feat(arch01): atomic platform install + authority kernel (Closes #822)

ARCH-01 Foundation Slice A — first implementation leaf of the #820/#821
program. Adds a new, disabled-by-default SQLite kernel:

- Connection-bound trusted-service actor context (cp_actor_principal/kind,
  cp_operation_mode, cp_service_session, cp_context_epoch) that SQL may read
  but never set; every mutating trigger runs the actor protocol and fails
  closed on a missing, stale, or epoch-shifted context.
- Immutable authority-dominance lattice with the exact seeded tuple set,
  validated individually by the install-state trigger.
- Principal-equivalence root: a class exists before its first principal and
  current_class_id is NOT NULL.
- Single atomic BEGIN IMMEDIATE install seeding the installer principal, the
  distinguished operator-key issuer, dominance, the initial NULL-grantor
  bootstrap grant, the active invariant, and the immutable installed marker
  last; second install returns ALREADY_INSTALLED with no mutation.
- Immutability triggers on marker/seed/dominance/issuer/installer
  registration/initial-grant identity; append-only audit_records; last-active
  grant floored by CHECK so concurrent revokes cannot drop it to zero.

Files: arch01_platform.py (new), tests/test_arch01_platform.py (new).

Tests: 25 tests + 21 subtests cover ACs 1-14 including negative, rollback,
raw-write-bypass, and concurrency. Focused suite green; full suite 4422
passed / 11 pre-existing baseline failures at 53c2c92, zero new.

Subsystem disabled by default until readiness checks pass. SQLite-first;
PostgreSQL parity is #827.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

anti_stomp_preflight.py

@@ -87,6 +87,7 @@ MUTATION_TASKS = frozenset({
     "edit_pr",
     "commit_files",
     "gitea_commit_files",
+    "publish_unpublished_branch",
     "delete_branch",
     "cleanup_merged_pr_branch",
     "cleanup_stale_claims",

arch01_platform.py

@@ -0,0 +1,892 @@
+"""ARCH-01 Foundation Slice A — atomic platform installation + authority kernel (#822).
+
+Parents: #820, #821. **First implementation leaf of the ARCH-01 program.**
+
+This module implements the smallest executable ARCH-01 foundation:
+
+* a connection-bound authenticated actor context (``cp_actor_*`` /
+  ``cp_operation_mode`` / ``cp_context_epoch`` SQLite scalar functions that SQL
+  may *read* but can never *set* — ``[TRUSTED-SERVICE]`` authenticity);
+* an immutable authority-dominance lattice with an exact seeded tuple set
+  (``[SCHEMA]``);
+* the principal-equivalence root (a class exists *before* its first principal;
+  ``principals.current_class_id`` is ``NOT NULL``; ``[SCHEMA]``);
+* a single-transaction platform installation that seeds the initial
+  ``platform.bootstrap`` grant and an immutable ``installed`` marker, validated
+  by a fail-closed ``install_state`` ``BEFORE INSERT`` trigger (``[SCHEMA]``).
+
+Everything else in the ARCH-01/02/04 program (evidence stores, repository
+bindings, workspaces, PostgreSQL parity, full grant succession, full principal
+merge) is out of scope here and tracked in its own issue — see #822 §5/§17.
+
+**Readiness / production posture.** This subsystem is *disabled by default*.
+Nothing in the running MCP server imports or enables it. It becomes a security
+boundary only once its readiness checks (the ACs in #822) pass in the target
+environment. Instantiating :class:`PlatformKernel` creates an isolated SQLite
+database and never touches the operational control-plane store.
+
+Enforcement classification (per #820 vocabulary):
+
+* ``[TRUSTED-SERVICE]`` — actor-context authenticity: the scalar functions are
+  registered by the trusted Python process; SQL cannot define or redefine them.
+* ``[SCHEMA]`` — fail-closed aborts, the dominance/immutability/NOT-NULL-class/
+  last-active-grant invariants, enforced by CHECK/FK/trigger.
+* ``[RUNTIME-ADAPTER]`` — *none* in this slice.
+
+SQLite-first. ``BEGIN IMMEDIATE`` serializes concurrent installs and concurrent
+grant/revoke on the singleton invariant row. PostgreSQL parity is a distinct
+issue (#827); this module does **not** claim it.
+"""
+
+from __future__ import annotations
+
+import os
+import sqlite3
+import threading
+from contextlib import contextmanager
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from typing import Iterator, Optional
+
+# --------------------------------------------------------------------------- #
+# Closed enumerations (#822 §4).
+# --------------------------------------------------------------------------- #
+
+ACTOR_KINDS = ("operator", "supervisor", "service", "installer")
+OPERATION_MODES = ("normal", "install", "merge", "internal_service")
+
+# Exact seeded authority-dominance tuple set (#822 §4). This set is normative:
+# the install-state trigger rejects any missing, additional, or malformed tuple.
+DOMINANCE_TUPLES = (
+    ("platform.bootstrap", "platform.bootstrap"),
+    ("platform.bootstrap", "project.admin"),
+    ("platform.bootstrap", "supervisor.root.establish"),
+    ("supervisor.root", "supervisor.register"),
+    ("supervisor.root", "supervisor.verify"),
+    ("supervisor.root", "supervisor.recover"),
+)
+
+# The distinguished operator-key issuer seeded during install.
+DISTINGUISHED_ISSUER_KIND = "operator-key"
+DISTINGUISHED_ISSUER_ID = "platform.bootstrap.operator-key"
+
+# Structured result codes (#822 §10).
+INSTALLED = "INSTALLED"
+ALREADY_INSTALLED = "ALREADY_INSTALLED"
+INVALID_ACTOR_CONTEXT = "INVALID_ACTOR_CONTEXT"
+INVALID_BOOTSTRAP_STATE = "INVALID_BOOTSTRAP_STATE"
+DOMINANCE_SET_MISMATCH = "DOMINANCE_SET_MISMATCH"
+AUTHORIZATION_DENIED = "AUTHORIZATION_DENIED"
+CONCURRENT_INSTALLATION_LOST = "CONCURRENT_INSTALLATION_LOST"
+
+# Required audit events (#822 §14).
+EVT_PLATFORM_INSTALLED = "platform_installed"
+EVT_GRANT_CREATED = "platform_grant_created"
+EVT_GRANT_REVOKED = "platform_grant_revoked"
+EVT_PRINCIPAL_REGISTERED = "principal_registered"
+
+SCHEMA_VERSION = 1
+
+DB_PATH_ENV = "ARCH01_PLATFORM_DB"
+
+
+class PlatformKernelError(RuntimeError):
+    """Base class for structured, code-bearing kernel failures."""
+
+    def __init__(self, code: str, message: str = "") -> None:
+        super().__init__(message or code)
+        self.code = code
+
+
+class ActorContextError(PlatformKernelError):
+    """Raised when a mutation is attempted without a valid actor context."""
+
+
+# --------------------------------------------------------------------------- #
+# Schema (#822 §6). Tables + fail-closed triggers.
+#
+# Every *mutating* trigger opens with the actor protocol: read the context
+# epoch, read the actor fields, and abort unless the context is present,
+# non-null, mode/kind well-formed, and epoch-consistent with the active
+# transaction. The scalar functions ``cp_*`` are registered from Python only;
+# SQL has no statement that can set them, which is the trusted-service boundary.
+# --------------------------------------------------------------------------- #
+
+_ACTOR_KINDS_SQL = ", ".join("'%s'" % k for k in ACTOR_KINDS)
+_OP_MODES_SQL = ", ".join("'%s'" % m for m in OPERATION_MODES)
+
+# Actor-protocol predicate: TRUE when the context is INVALID and the trigger
+# must abort. ``cp_actor_context_valid()`` folds "present + non-expired +
+# live-epoch == bound-epoch" (the read/re-read epoch equality of #822 §4) into
+# one trusted-service answer; the remaining reads assert field well-formedness.
+_INVALID_ACTOR = (
+    "cp_actor_context_valid() IS NOT 1 "
+    "OR cp_context_epoch() IS NULL "
+    "OR cp_actor_principal() IS NULL "
+    "OR cp_actor_kind() NOT IN (%s) "
+    "OR cp_operation_mode() NOT IN (%s)" % (_ACTOR_KINDS_SQL, _OP_MODES_SQL)
+)
+
+_ACTOR_GUARD = (
+    "SELECT CASE WHEN (%s) "
+    "THEN RAISE(ABORT, 'INVALID_ACTOR_CONTEXT') END;" % _INVALID_ACTOR
+)
+
+# require_installed: abort a privileged mutation when there is no install
+# marker and we are not currently installing (#822 §4).
+_REQUIRE_INSTALLED = (
+    "SELECT CASE WHEN ((SELECT COUNT(*) FROM install_state) = 0 "
+    "AND cp_operation_mode() <> 'install') "
+    "THEN RAISE(ABORT, 'NOT_INSTALLED') END;"
+)
+
+_SCHEMA_SQL = f"""
+PRAGMA foreign_keys = ON;
+
+CREATE TABLE IF NOT EXISTS arch01_meta (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL
+);
+
+-- Equivalence classes are created BEFORE their first principal (#822 §4).
+CREATE TABLE IF NOT EXISTS principal_equivalence_classes (
+    class_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS authoritative_issuers (
+    issuer_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    issuer_kind TEXT NOT NULL,
+    issuer_ref TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    UNIQUE (issuer_kind, issuer_ref)
+);
+
+-- current_class_id is NOT NULL: a principal cannot exist without a class
+-- (#822 AC6). issuer_id is nullable ONLY for the installer during install
+-- (#822 AC7), enforced by trg_principals_null_issuer below.
+CREATE TABLE IF NOT EXISTS principals (
+    principal_id TEXT PRIMARY KEY,
+    actor_kind TEXT NOT NULL CHECK (actor_kind IN ({_ACTOR_KINDS_SQL})),
+    current_class_id INTEGER NOT NULL REFERENCES principal_equivalence_classes(class_id),
+    issuer_id INTEGER REFERENCES authoritative_issuers(issuer_id),
+    registered_by TEXT REFERENCES principals(principal_id),
+    created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS authority_dominance (
+    dominant TEXT NOT NULL,
+    subordinate TEXT NOT NULL,
+    PRIMARY KEY (dominant, subordinate)
+);
+
+CREATE TABLE IF NOT EXISTS platform_bootstrap_seed (
+    seed_id INTEGER PRIMARY KEY CHECK (seed_id = 1),
+    installer_principal_id TEXT NOT NULL REFERENCES principals(principal_id),
+    created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS platform_bootstrap_grants (
+    grant_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    grantee_principal_id TEXT NOT NULL REFERENCES principals(principal_id),
+    granted_by TEXT REFERENCES principals(principal_id),
+    active INTEGER NOT NULL DEFAULT 1 CHECK (active IN (0, 1)),
+    created_at TEXT NOT NULL,
+    revoked_at TEXT
+);
+
+-- Singleton row; active_count floored at 1 by CHECK so the last active grant
+-- can never be revoked (#822 AC11).
+CREATE TABLE IF NOT EXISTS platform_active_invariant (
+    id INTEGER PRIMARY KEY CHECK (id = 1),
+    active_count INTEGER NOT NULL CHECK (active_count >= 1)
+);
+
+-- The immutable install marker; inserted LAST in the install transaction.
+CREATE TABLE IF NOT EXISTS install_state (
+    id INTEGER PRIMARY KEY CHECK (id = 1),
+    marker TEXT NOT NULL CHECK (marker = 'installed'),
+    installed_at TEXT NOT NULL
+);
+
+-- Append-only (#822 AC14).
+CREATE TABLE IF NOT EXISTS audit_records (
+    audit_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    event TEXT NOT NULL,
+    principal_id TEXT,
+    detail TEXT,
+    created_at TEXT NOT NULL
+);
+
+-- ------------------------------------------------------------------------- --
+-- Actor protocol on every mutating trigger (#822 §4, [SCHEMA] fail-closed).
+-- ------------------------------------------------------------------------- --
+
+CREATE TRIGGER IF NOT EXISTS trg_classes_actor
+BEFORE INSERT ON principal_equivalence_classes
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_issuers_actor
+BEFORE INSERT ON authoritative_issuers
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_principals_actor
+BEFORE INSERT ON principals
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_dominance_actor
+BEFORE INSERT ON authority_dominance
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_seed_actor
+BEFORE INSERT ON platform_bootstrap_seed
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_grants_actor_insert
+BEFORE INSERT ON platform_bootstrap_grants
+BEGIN
+    {_ACTOR_GUARD}
+    {_REQUIRE_INSTALLED}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_grants_actor_update
+BEFORE UPDATE ON platform_bootstrap_grants
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_invariant_actor_insert
+BEFORE INSERT ON platform_active_invariant
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_invariant_actor_update
+BEFORE UPDATE ON platform_active_invariant
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_audit_actor
+BEFORE INSERT ON audit_records
+BEGIN
+    {_ACTOR_GUARD}
+END;
+
+-- ------------------------------------------------------------------------- --
+-- NOT-NULL-issuer exception for the installer only (#822 AC7).
+-- A NULL issuer_id is accepted solely for an installer principal during
+-- install mode, before the marker exists; any other NULL-issuer principal is
+-- rejected. install-time issuer linkage (installer -> distinguished issuer)
+-- is applied by a later UPDATE, permitted while no marker exists.
+-- ------------------------------------------------------------------------- --
+
+CREATE TRIGGER IF NOT EXISTS trg_principals_null_issuer
+BEFORE INSERT ON principals
+WHEN NEW.issuer_id IS NULL
+BEGIN
+    SELECT CASE WHEN NOT (
+        NEW.actor_kind = 'installer'
+        AND cp_operation_mode() = 'install'
+        AND (SELECT COUNT(*) FROM install_state) = 0
+        AND (SELECT COUNT(*) FROM principals WHERE issuer_id IS NULL) = 0
+    ) THEN RAISE(ABORT, 'INVALID_BOOTSTRAP_STATE') END;
+END;
+
+-- ------------------------------------------------------------------------- --
+-- Post-install immutability of the authority root (#822 §4, AC9).
+-- Registration fields freeze only AFTER the marker exists, so the install
+-- transaction's own installer issuer-linkage UPDATE is permitted.
+-- ------------------------------------------------------------------------- --
+
+CREATE TRIGGER IF NOT EXISTS trg_principals_frozen_update
+BEFORE UPDATE ON principals
+WHEN (SELECT COUNT(*) FROM install_state) > 0
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_PRINCIPAL');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_principals_frozen_delete
+BEFORE DELETE ON principals
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_PRINCIPAL');
+END;
+
+-- Distinguished issuer identity is immutable once written.
+CREATE TRIGGER IF NOT EXISTS trg_issuers_immutable_update
+BEFORE UPDATE ON authoritative_issuers
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_ISSUER');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_issuers_immutable_delete
+BEFORE DELETE ON authoritative_issuers
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_ISSUER');
+END;
+
+-- The dominance lattice is immutable once seeded.
+CREATE TRIGGER IF NOT EXISTS trg_dominance_immutable_update
+BEFORE UPDATE ON authority_dominance
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_DOMINANCE');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_dominance_immutable_delete
+BEFORE DELETE ON authority_dominance
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_DOMINANCE');
+END;
+
+-- The bootstrap seed is immutable once written.
+CREATE TRIGGER IF NOT EXISTS trg_seed_immutable_update
+BEFORE UPDATE ON platform_bootstrap_seed
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_SEED');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_seed_immutable_delete
+BEFORE DELETE ON platform_bootstrap_seed
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_SEED');
+END;
+
+-- The install marker is immutable once written.
+CREATE TRIGGER IF NOT EXISTS trg_install_state_immutable_update
+BEFORE UPDATE ON install_state
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_INSTALL_STATE');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_install_state_immutable_delete
+BEFORE DELETE ON install_state
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_INSTALL_STATE');
+END;
+
+-- Grants: identity is immutable; the ONLY permitted mutation is a single
+-- active 1 -> 0 revocation (#822 §4 initial-grant identity immutability +
+-- grant/revoke). Reactivation and identity edits are rejected.
+CREATE TRIGGER IF NOT EXISTS trg_grants_identity_frozen
+BEFORE UPDATE ON platform_bootstrap_grants
+WHEN NOT (
+    NEW.grant_id = OLD.grant_id
+    AND NEW.grantee_principal_id = OLD.grantee_principal_id
+    AND NEW.granted_by IS OLD.granted_by
+    AND NEW.created_at = OLD.created_at
+    AND OLD.active = 1
+    AND NEW.active = 0
+)
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_GRANT');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_grants_no_delete
+BEFORE DELETE ON platform_bootstrap_grants
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_GRANT');
+END;
+
+-- audit_records is append-only.
+CREATE TRIGGER IF NOT EXISTS trg_audit_immutable_update
+BEFORE UPDATE ON audit_records
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_AUDIT');
+END;
+
+CREATE TRIGGER IF NOT EXISTS trg_audit_immutable_delete
+BEFORE DELETE ON audit_records
+BEGIN
+    SELECT RAISE(ABORT, 'IMMUTABLE_AUDIT');
+END;
+
+-- ------------------------------------------------------------------------- --
+-- install_state BEFORE INSERT: validate the whole bootstrap atomically
+-- (#822 §4, AC4). Each dominance tuple is checked individually; a missing,
+-- additional, or malformed tuple -> DOMINANCE_SET_MISMATCH. The seed<->installer
+-- link, the single active NULL-grantor installer grant, the installer's
+-- non-NULL issuer, the active invariant, and "no extra principal created under
+-- the NULL-issuer exception" -> INVALID_BOOTSTRAP_STATE.
+-- ------------------------------------------------------------------------- --
+
+CREATE TRIGGER IF NOT EXISTS trg_install_state_validate
+BEFORE INSERT ON install_state
+BEGIN
+    SELECT CASE WHEN NOT (
+        (SELECT COUNT(*) FROM authority_dominance) = {len(DOMINANCE_TUPLES)}
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='platform.bootstrap' AND subordinate='platform.bootstrap')
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='platform.bootstrap' AND subordinate='project.admin')
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='platform.bootstrap' AND subordinate='supervisor.root.establish')
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='supervisor.root' AND subordinate='supervisor.register')
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='supervisor.root' AND subordinate='supervisor.verify')
+        AND EXISTS (SELECT 1 FROM authority_dominance WHERE dominant='supervisor.root' AND subordinate='supervisor.recover')
+    ) THEN RAISE(ABORT, 'DOMINANCE_SET_MISMATCH') END;
+
+    SELECT CASE WHEN NOT (
+        (SELECT COUNT(*) FROM platform_bootstrap_seed) = 1
+        AND (SELECT COUNT(*) FROM principals) = 1
+        AND (SELECT actor_kind FROM principals
+             WHERE principal_id = (SELECT installer_principal_id FROM platform_bootstrap_seed WHERE seed_id = 1)
+            ) = 'installer'
+        AND (SELECT issuer_id FROM principals
+             WHERE principal_id = (SELECT installer_principal_id FROM platform_bootstrap_seed WHERE seed_id = 1)
+            ) IS NOT NULL
+        AND (SELECT COUNT(*) FROM platform_bootstrap_grants
+             WHERE granted_by IS NULL AND active = 1
+               AND grantee_principal_id = (SELECT installer_principal_id FROM platform_bootstrap_seed WHERE seed_id = 1)
+            ) = 1
+        AND (SELECT COUNT(*) FROM platform_bootstrap_grants) = 1
+        AND (SELECT active_count FROM platform_active_invariant WHERE id = 1) = 1
+    ) THEN RAISE(ABORT, 'INVALID_BOOTSTRAP_STATE') END;
+END;
+"""
+
+
+def default_db_path() -> str:
+    return os.environ.get(
+        DB_PATH_ENV,
+        os.path.expanduser("~/.cache/gitea-tools/arch01/platform.sqlite3"),
+    )
+
+
+def _utc_now_iso() -> str:
+    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+
+
+@dataclass(frozen=True)
+class OperationResult:
+    """Structured result of a kernel operation (#822 §10)."""
+
+    code: str
+    detail: str = ""
+
+    @property
+    def ok(self) -> bool:
+        return self.code in (INSTALLED, ALREADY_INSTALLED)
+
+
+@dataclass
+class _ActorContext:
+    principal: str
+    kind: str
+    mode: str
+    session: Optional[str]
+    bound_epoch: int
+    live_epoch: int
+    expired: bool = False
+
+
+class PlatformKernel:
+    """ARCH-01 authority kernel over a single SQLite connection.
+
+    The connection carries the trusted-service actor context: the ``cp_*``
+    scalar functions read the context this object holds. Only Python code here
+    can bind or clear it, so no SQL statement can assert an actor identity — the
+    trusted-service authenticity boundary of #822 §4.
+    """
+
+    def __init__(self, db_path: Optional[str] = None, *, busy_timeout_ms: int = 5000) -> None:
+        self.db_path = db_path or default_db_path()
+        if self.db_path != ":memory:":
+            parent = os.path.dirname(self.db_path)
+            if parent:
+                os.makedirs(parent, exist_ok=True)
+        self._ctx: Optional[_ActorContext] = None
+        self._epoch_seq = 0
+        self._lock = threading.Lock()
+        # check_same_thread=False is safe: every mutation path is serialized
+        # by self._lock, so the connection is never used concurrently even when
+        # callers drive the kernel from different threads (concurrency tests).
+        self._conn = sqlite3.connect(
+            self.db_path, isolation_level=None, check_same_thread=False
+        )
+        self._conn.execute("PRAGMA foreign_keys = ON")
+        self._conn.execute(f"PRAGMA busy_timeout = {int(busy_timeout_ms)}")
+        self._register_actor_functions()
+        self._migrate()
+
+    # -- trusted-service actor functions ---------------------------------- #
+
+    def _register_actor_functions(self) -> None:
+        c = self._conn
+        c.create_function("cp_actor_principal", 0, lambda: self._ctx.principal if self._ctx else None)
+        c.create_function("cp_actor_kind", 0, lambda: self._ctx.kind if self._ctx else None)
+        c.create_function("cp_operation_mode", 0, lambda: self._ctx.mode if self._ctx else None)
+        c.create_function("cp_service_session", 0, lambda: self._ctx.session if self._ctx else None)
+        c.create_function("cp_context_epoch", 0, self._fn_context_epoch)
+        # Trusted-service helper: folds present + non-expired + epoch-consistent
+        # into the read/re-read epoch equality of #822 §4.
+        c.create_function("cp_actor_context_valid", 0, self._fn_context_valid)
+
+    def _fn_context_epoch(self) -> Optional[int]:
+        if self._ctx is None or self._ctx.expired:
+            return None
+        return self._ctx.live_epoch
+
+    def _fn_context_valid(self) -> int:
+        ctx = self._ctx
+        if ctx is None or ctx.expired:
+            return 0
+        # read/re-read epoch equality: a context whose live epoch has drifted
+        # from the epoch it was bound to (a stale/replaced connection context)
+        # is not bound to the active transaction and fails closed.
+        if ctx.live_epoch != ctx.bound_epoch:
+            return 0
+        if ctx.principal is None:
+            return 0
+        if ctx.kind not in ACTOR_KINDS or ctx.mode not in OPERATION_MODES:
+            return 0
+        return 1
+
+    # -- context lifecycle ------------------------------------------------ #
+
+    @contextmanager
+    def actor_context(
+        self, principal: str, kind: str, mode: str, session: Optional[str] = None
+    ) -> Iterator[None]:
+        """Bind a trusted actor context for the duration of the block."""
+        prev = self._ctx
+        self._epoch_seq += 1
+        epoch = self._epoch_seq
+        self._ctx = _ActorContext(
+            principal=principal, kind=kind, mode=mode, session=session,
+            bound_epoch=epoch, live_epoch=epoch,
+        )
+        try:
+            yield
+        finally:
+            self._ctx = prev
+
+    def _clear_context(self) -> None:
+        self._ctx = None
+
+    # -- migration -------------------------------------------------------- #
+
+    def _migrate(self) -> None:
+        self._conn.executescript(_SCHEMA_SQL)
+        self._conn.execute(
+            "INSERT OR IGNORE INTO arch01_meta(key, value) VALUES ('schema_version', ?)",
+            (str(SCHEMA_VERSION),),
+        )
+        self._conn.execute(
+            "INSERT OR IGNORE INTO arch01_meta(key, value) VALUES "
+            "('architecture', 'ARCH-01 Slice A: atomic install + authority kernel (#822); "
+            "disabled by default until readiness checks pass')"
+        )
+
+    # -- introspection ---------------------------------------------------- #
+
+    def is_installed(self) -> bool:
+        row = self._conn.execute("SELECT COUNT(*) FROM install_state").fetchone()
+        return bool(row[0])
+
+    def active_grant_count(self) -> int:
+        row = self._conn.execute(
+            "SELECT active_count FROM platform_active_invariant WHERE id = 1"
+        ).fetchone()
+        return int(row[0]) if row else 0
+
+    def audit_events(self) -> list[str]:
+        return [
+            r[0]
+            for r in self._conn.execute(
+                "SELECT event FROM audit_records ORDER BY audit_id"
+            ).fetchall()
+        ]
+
+    def close(self) -> None:
+        self._conn.close()
+
+    # -- operations ------------------------------------------------------- #
+
+    def install_platform(
+        self,
+        installer_principal_id: str = "platform.installer",
+        *,
+        session: Optional[str] = None,
+    ) -> OperationResult:
+        """Single atomic install transaction (#822 §4/§7).
+
+        ``BEGIN IMMEDIATE`` serializes concurrent installs; the loser rechecks
+        the marker and returns ``ALREADY_INSTALLED``, or — if it never acquires
+        the write lock — ``CONCURRENT_INSTALLATION_LOST``. On any stage failure
+        the whole transaction rolls back leaving no partial rows (AC3/AC5).
+        """
+        now = _utc_now_iso()
+        with self._lock:
+            try:
+                self._conn.execute("BEGIN IMMEDIATE")
+            except sqlite3.OperationalError as exc:
+                if "locked" in str(exc).lower() or "busy" in str(exc).lower():
+                    return OperationResult(CONCURRENT_INSTALLATION_LOST, str(exc))
+                raise
+            try:
+                if self.is_installed():
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(ALREADY_INSTALLED, "install marker already present")
+
+                with self.actor_context(installer_principal_id, "installer", "install", session):
+                    c = self._conn
+                    # class -> installer principal (temporary NULL issuer)
+                    cur = c.execute(
+                        "INSERT INTO principal_equivalence_classes(created_at) VALUES (?)",
+                        (now,),
+                    )
+                    class_id = cur.lastrowid
+                    c.execute(
+                        "INSERT INTO principals"
+                        "(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                        "VALUES (?, 'installer', ?, NULL, ?, ?)",
+                        (installer_principal_id, class_id, installer_principal_id, now),
+                    )
+                    # distinguished operator-key issuer
+                    cur = c.execute(
+                        "INSERT INTO authoritative_issuers(issuer_kind, issuer_ref, created_at) "
+                        "VALUES (?, ?, ?)",
+                        (DISTINGUISHED_ISSUER_KIND, DISTINGUISHED_ISSUER_ID, now),
+                    )
+                    issuer_id = cur.lastrowid
+                    # link installer -> issuer (permitted pre-marker)
+                    c.execute(
+                        "UPDATE principals SET issuer_id = ? WHERE principal_id = ?",
+                        (issuer_id, installer_principal_id),
+                    )
+                    # dominance tuples
+                    c.executemany(
+                        "INSERT INTO authority_dominance(dominant, subordinate) VALUES (?, ?)",
+                        DOMINANCE_TUPLES,
+                    )
+                    # seed
+                    c.execute(
+                        "INSERT INTO platform_bootstrap_seed(seed_id, installer_principal_id, created_at) "
+                        "VALUES (1, ?, ?)",
+                        (installer_principal_id, now),
+                    )
+                    # initial grant (granted_by NULL, active)
+                    c.execute(
+                        "INSERT INTO platform_bootstrap_grants"
+                        "(grantee_principal_id, granted_by, active, created_at) "
+                        "VALUES (?, NULL, 1, ?)",
+                        (installer_principal_id, now),
+                    )
+                    # active invariant
+                    c.execute(
+                        "INSERT INTO platform_active_invariant(id, active_count) VALUES (1, 1)"
+                    )
+                    # audit rows for the security-sensitive operation
+                    c.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_PRINCIPAL_REGISTERED, installer_principal_id, "installer", now),
+                    )
+                    c.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_GRANT_CREATED, installer_principal_id, "initial platform.bootstrap grant", now),
+                    )
+                    # install marker LAST -> fires the whole-bootstrap validator
+                    c.execute(
+                        "INSERT INTO install_state(id, marker, installed_at) VALUES (1, 'installed', ?)",
+                        (now,),
+                    )
+                    c.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_PLATFORM_INSTALLED, installer_principal_id, "platform installed", now),
+                    )
+                self._conn.execute("COMMIT")
+                return OperationResult(INSTALLED, "platform installed")
+            except sqlite3.Error as exc:
+                self._safe_rollback()
+                return OperationResult(self._classify(exc), str(exc))
+
+    def register_principal(
+        self,
+        principal_id: str,
+        actor_kind: str,
+        issuer_ref: str,
+        *,
+        actor_principal: str,
+        actor_kind_ctx: str = "operator",
+        session: Optional[str] = None,
+    ) -> OperationResult:
+        """Atomically create an equivalence class and its first principal.
+
+        The class is inserted *before* the principal, and ``current_class_id``
+        is ``NOT NULL`` (#822 AC6): a principal can never exist classless.
+        The principal references an existing issuer (non-NULL); the temporary
+        NULL-issuer exception is reserved for the installer during install
+        (AC7).
+        """
+        if actor_kind not in ACTOR_KINDS:
+            return OperationResult(INVALID_BOOTSTRAP_STATE, f"bad actor_kind {actor_kind!r}")
+        now = _utc_now_iso()
+        with self._lock:
+            try:
+                self._conn.execute("BEGIN IMMEDIATE")
+            except sqlite3.OperationalError as exc:
+                return OperationResult(AUTHORIZATION_DENIED, str(exc))
+            try:
+                if not self.is_installed():
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(INVALID_BOOTSTRAP_STATE, "platform not installed")
+                row = self._conn.execute(
+                    "SELECT issuer_id FROM authoritative_issuers WHERE issuer_ref = ?",
+                    (issuer_ref,),
+                ).fetchone()
+                if row is None:
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(INVALID_BOOTSTRAP_STATE, f"unknown issuer {issuer_ref!r}")
+                issuer_id = row[0]
+                with self.actor_context(actor_principal, actor_kind_ctx, "normal", session):
+                    cur = self._conn.execute(
+                        "INSERT INTO principal_equivalence_classes(created_at) VALUES (?)",
+                        (now,),
+                    )
+                    class_id = cur.lastrowid
+                    self._conn.execute(
+                        "INSERT INTO principals"
+                        "(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                        "VALUES (?, ?, ?, ?, ?, ?)",
+                        (principal_id, actor_kind, class_id, issuer_id, actor_principal, now),
+                    )
+                    self._conn.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_PRINCIPAL_REGISTERED, principal_id, actor_kind, now),
+                    )
+                self._conn.execute("COMMIT")
+                return OperationResult(INSTALLED, f"registered {principal_id}")
+            except sqlite3.Error as exc:
+                self._safe_rollback()
+                return OperationResult(self._classify(exc), str(exc))
+
+    def grant_platform_bootstrap(
+        self,
+        grantee_principal_id: str,
+        granted_by: str,
+        *,
+        actor_kind_ctx: str = "operator",
+        session: Optional[str] = None,
+    ) -> OperationResult:
+        """Create an additional active platform.bootstrap grant.
+
+        Serialized on the singleton invariant row via ``BEGIN IMMEDIATE``.
+        """
+        now = _utc_now_iso()
+        with self._lock:
+            try:
+                self._conn.execute("BEGIN IMMEDIATE")
+            except sqlite3.OperationalError as exc:
+                return OperationResult(AUTHORIZATION_DENIED, str(exc))
+            try:
+                if not self.is_installed():
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(INVALID_BOOTSTRAP_STATE, "platform not installed")
+                with self.actor_context(granted_by, actor_kind_ctx, "normal", session):
+                    self._conn.execute(
+                        "INSERT INTO platform_bootstrap_grants"
+                        "(grantee_principal_id, granted_by, active, created_at) "
+                        "VALUES (?, ?, 1, ?)",
+                        (grantee_principal_id, granted_by, now),
+                    )
+                    self._conn.execute(
+                        "UPDATE platform_active_invariant SET active_count = active_count + 1 WHERE id = 1"
+                    )
+                    self._conn.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_GRANT_CREATED, grantee_principal_id, f"granted_by={granted_by}", now),
+                    )
+                self._conn.execute("COMMIT")
+                return OperationResult(INSTALLED, f"granted to {grantee_principal_id}")
+            except sqlite3.Error as exc:
+                self._safe_rollback()
+                return OperationResult(self._classify(exc), str(exc))
+
+    def revoke_platform_bootstrap(
+        self,
+        grant_id: int,
+        *,
+        actor_principal: str,
+        actor_kind_ctx: str = "operator",
+        session: Optional[str] = None,
+    ) -> OperationResult:
+        """Revoke an active grant, floored so the last one can never drop.
+
+        The ``active_count >= 1`` CHECK plus ``BEGIN IMMEDIATE`` serialization
+        make two concurrent revocations unable to remove the final active grant
+        (#822 AC11): the decrement that would reach zero fails and rolls back.
+        """
+        now = _utc_now_iso()
+        with self._lock:
+            try:
+                self._conn.execute("BEGIN IMMEDIATE")
+            except sqlite3.OperationalError as exc:
+                return OperationResult(AUTHORIZATION_DENIED, str(exc))
+            try:
+                if not self.is_installed():
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(INVALID_BOOTSTRAP_STATE, "platform not installed")
+                row = self._conn.execute(
+                    "SELECT active, grantee_principal_id FROM platform_bootstrap_grants WHERE grant_id = ?",
+                    (grant_id,),
+                ).fetchone()
+                if row is None or row[0] != 1:
+                    self._conn.execute("ROLLBACK")
+                    return OperationResult(AUTHORIZATION_DENIED, "grant absent or already inactive")
+                grantee = row[1]
+                with self.actor_context(actor_principal, actor_kind_ctx, "normal", session):
+                    # Decrement first: the CHECK floor rejects dropping below 1,
+                    # aborting the whole revoke before the grant flips inactive.
+                    self._conn.execute(
+                        "UPDATE platform_active_invariant SET active_count = active_count - 1 WHERE id = 1"
+                    )
+                    self._conn.execute(
+                        "UPDATE platform_bootstrap_grants SET active = 0, revoked_at = ? WHERE grant_id = ?",
+                        (now, grant_id),
+                    )
+                    self._conn.execute(
+                        "INSERT INTO audit_records(event, principal_id, detail, created_at) "
+                        "VALUES (?, ?, ?, ?)",
+                        (EVT_GRANT_REVOKED, grantee, f"grant_id={grant_id}", now),
+                    )
+                self._conn.execute("COMMIT")
+                return OperationResult(INSTALLED, f"revoked grant {grant_id}")
+            except sqlite3.Error as exc:
+                self._safe_rollback()
+                return OperationResult(self._classify(exc), str(exc))
+
+    # -- helpers ---------------------------------------------------------- #
+
+    def _safe_rollback(self) -> None:
+        try:
+            self._conn.execute("ROLLBACK")
+        except sqlite3.Error:
+            pass
+
+    @staticmethod
+    def _classify(exc: sqlite3.Error) -> str:
+        msg = str(exc)
+        if "INVALID_ACTOR_CONTEXT" in msg:
+            return INVALID_ACTOR_CONTEXT
+        if "DOMINANCE_SET_MISMATCH" in msg:
+            return DOMINANCE_SET_MISMATCH
+        if "active_count" in msg or "CHECK constraint failed: platform_active_invariant" in msg:
+            # last-active-grant floor tripped
+            return AUTHORIZATION_DENIED
+        if any(tag in msg for tag in (
+            "INVALID_BOOTSTRAP_STATE", "IMMUTABLE_", "NOT_INSTALLED",
+        )):
+            return INVALID_BOOTSTRAP_STATE
+        return INVALID_BOOTSTRAP_STATE

branch_publish.py

@@ -0,0 +1,591 @@
+"""Publish an unpublished local commit on a registered issue worktree (#812 AC20).
+
+Entry point B of #812 is the state where an author's work has already advanced
+to a local commit: the worktree is registered, clean, on the issue branch, and
+carries the only copy of the implementation, but the branch has never been
+published. That state deadlocks, because two individually correct predicates
+close a cycle:
+
+* ``issue_lock_renewal.assess_exact_owner_lease_renewal`` refuses to renew an
+  expired lease without an observable remote head — an unpublished branch has
+  none.
+* Every publication path (``gitea_commit_files``, ``gitea_create_pr``) derives
+  its workspace from the author issue lock under #618, so nothing can create
+  that remote head without first holding the lock.
+
+This module supplies the missing operation: it publishes an *already committed*
+local head to the remote branch, so exact-owner renewal has the evidence it
+requires. It deliberately does **not** renew, reclaim, rebind, or clear any
+lock. Publication is the whole of its authority.
+
+Why this is not a lock bypass
+-----------------------------
+The operation can only publish a branch whose **durable issue-lock record
+already names the caller as claimant**. Ownership is read from the lock file on
+disk (``issue_lock_store``), never from a caller-supplied flag, so the tool
+cannot manufacture a claim it does not already hold. Nothing here weakens the
+#510/#618/#713 guards: a dirty tree, an unregistered worktree, a foreign
+claimant, a changed HEAD, or a divergent remote head each refuse, exactly as
+they do today. The only thing this adds is the ability to make an existing,
+owned, committed, clean branch observable on the remote.
+
+Separation of records (#812 AC23)
+---------------------------------
+The durable **issue-lock file** and the control-plane **workflow lease** are
+distinct records. This module reads the former as ownership evidence and writes
+neither. Publishing changes remote git state only; no lock is renewed,
+abandoned, reclaimed, or generation-bumped here.
+
+Process evidence (#812 AC24)
+----------------------------
+Liveness of the lock's recorded pid is **not consulted**. That is deliberate:
+the recorded pid routinely belongs to the long-running MCP daemon rather than to
+an active author client, and the existing reclaim predicate
+(``assess_expired_lock_reclaim``) can never be satisfied while that daemon runs.
+Publication does not require the recording process to be dead, so this module
+never asserts, infers, or depends on a process being dead. Ownership is proven
+by identity and profile match against the recorded claimant instead.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import os
+import re
+import subprocess
+
+from reviewer_worktree import parse_dirty_tracked_files
+from stable_branch_push_guard import is_stable_ref, redact_command
+
+# Assessment outcomes.
+PUBLISH_SANCTIONED = "publish_sanctioned"
+ALREADY_PUBLISHED = "already_published"
+REFUSED = "refused"
+
+#: Implementation branches must stay traceable to their issue (#713 lineage).
+ISSUE_BRANCH_RE = re.compile(r"^(fix|feat|docs|chore)/issue-(\d+)-.+$")
+
+_SHA_RE = re.compile(r"^[0-9a-f]{40}$")
+
+
+def _text(value: object) -> str:
+    return value.strip() if isinstance(value, str) else ""
+
+
+def _realpath(value: str | None) -> str | None:
+    path = _text(value)
+    return os.path.realpath(path) if path else None
+
+
+def parse_untracked_files(porcelain_status: str) -> list[str]:
+    """Return untracked paths from ``git status --porcelain`` output.
+
+    ``reviewer_worktree.parse_dirty_tracked_files`` deliberately skips ``??``
+    entries. Publication needs both halves: an untracked file in the worktree is
+    unpublished content that the commit does not carry, so publishing would
+    silently leave it behind.
+    """
+    untracked: list[str] = []
+    for line in (porcelain_status or "").splitlines():
+        if not line.startswith("??"):
+            continue
+        path = line[2:].strip()
+        if path:
+            untracked.append(path)
+    return untracked
+
+
+def hash_worktree_files(worktree_path: str, paths) -> dict[str, str | None]:
+    """SHA-256 each path under *worktree_path*; ``None`` when unreadable."""
+    root = _text(worktree_path)
+    hashes: dict[str, str | None] = {}
+    for rel in paths or ():
+        rel_text = _text(rel)
+        if not rel_text:
+            continue
+        full = os.path.join(root, rel_text)
+        try:
+            with open(full, "rb") as handle:
+                digest = hashlib.sha256()
+                for chunk in iter(lambda: handle.read(65536), b""):
+                    digest.update(chunk)
+            hashes[rel_text] = digest.hexdigest()
+        except OSError:
+            hashes[rel_text] = None
+    return hashes
+
+
+def read_remote_branch_head(
+    worktree_path: str, remote_name: str, branch_name: str
+) -> dict:
+    """Observe the remote head for *branch_name*, read-only.
+
+    ``probe_ok`` False means git could not answer at all. That is kept distinct
+    from "the branch does not exist": an unobservable remote must fail closed
+    rather than be mistaken for an absent branch, because the two lead to
+    opposite dispositions.
+    """
+    path = _text(worktree_path)
+    remote = _text(remote_name)
+    branch = _text(branch_name)
+    result: dict = {
+        "probe_ok": False,
+        "remote_branch_exists": False,
+        "remote_head_sha": None,
+        "reasons": [],
+    }
+    if not (path and remote and branch):
+        result["reasons"].append(
+            "remote head probe requires a worktree path, remote name, and branch"
+        )
+        return result
+    try:
+        res = subprocess.run(
+            ["git", "-C", path, "ls-remote", remote, f"refs/heads/{branch}"],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+    except OSError as exc:  # git unavailable — fail closed, never assume absent
+        result["reasons"].append(f"remote head probe could not run: {exc}")
+        return result
+    if res.returncode != 0:
+        result["reasons"].append(
+            f"remote head probe failed for '{branch}' on remote '{remote}'"
+        )
+        return result
+
+    result["probe_ok"] = True
+    for line in (res.stdout or "").splitlines():
+        parts = line.split()
+        if len(parts) >= 2 and parts[1] == f"refs/heads/{branch}":
+            result["remote_branch_exists"] = True
+            result["remote_head_sha"] = parts[0].strip()
+            break
+    return result
+
+
+def read_is_ancestor(
+    worktree_path: str, ancestor_sha: str, descendant_sha: str
+) -> dict:
+    """Observe whether *ancestor_sha* is an ancestor of *descendant_sha*."""
+    path = _text(worktree_path)
+    ancestor = _text(ancestor_sha)
+    descendant = _text(descendant_sha)
+    result: dict = {"probe_ok": False, "is_ancestor": False, "reasons": []}
+    if not (path and ancestor and descendant):
+        result["reasons"].append(
+            "ancestry probe requires a worktree path and both commit SHAs"
+        )
+        return result
+    try:
+        present = subprocess.run(
+            ["git", "-C", path, "rev-parse", "--verify", "--quiet",
+             f"{ancestor}^{{commit}}"],
+            capture_output=True, text=True, check=False,
+        )
+        if present.returncode != 0:
+            result["reasons"].append(
+                f"remote head {ancestor} is not present locally, so it cannot be "
+                "proven an ancestor of the commit being published"
+            )
+            return result
+        res = subprocess.run(
+            ["git", "-C", path, "merge-base", "--is-ancestor", ancestor, descendant],
+            capture_output=True, text=True, check=False,
+        )
+    except OSError as exc:
+        result["reasons"].append(f"ancestry probe could not run: {exc}")
+        return result
+    result["probe_ok"] = res.returncode in (0, 1)
+    result["is_ancestor"] = res.returncode == 0
+    return result
+
+
+def assess_unpublished_commit_publication(
+    existing_lock,
+    *,
+    issue_number: int,
+    branch_name: str,
+    worktree_path: str,
+    expected_head: str,
+    remote: str,
+    org: str,
+    repo: str,
+    identity: str | None,
+    profile: str | None,
+    worktree_state,
+    worktree_registered: bool | None = None,
+    remote_probe=None,
+    ancestry=None,
+    competing_open_prs=(),
+    expected_file_hashes=None,
+    observed_file_hashes=None,
+) -> dict:
+    """Decide whether an unpublished local commit may be published (#812 AC20).
+
+    Pure predicate. Every input is either a caller-declared expectation that
+    must be *matched* against observation, or a server-side observation. No
+    caller-supplied boolean is accepted as proof of ownership, liveness, or
+    eligibility: ``existing_lock`` comes from the durable lock file and the
+    git/PR state is observed by the server.
+
+    The single mutating disposition it can return is "publish this exact commit
+    to this exact branch". It never sanctions renewal, reclamation, force
+    updates, history rewriting, or publication of uncommitted content.
+    """
+    reasons: list[str] = []
+    branch = _text(branch_name)
+    head = _text(expected_head).lower()
+    workspace = _realpath(worktree_path)
+    state = worktree_state if isinstance(worktree_state, dict) else {}
+    lock = existing_lock if isinstance(existing_lock, dict) else None
+
+    evidence: dict = {
+        "issue_number": issue_number,
+        "branch_name": branch or None,
+        "worktree_path": workspace,
+        "expected_head": head or None,
+        "remote": _text(remote) or None,
+        "org": _text(org) or None,
+        "repo": _text(repo) or None,
+        "identity": _text(identity) or None,
+        "profile": _text(profile) or None,
+        "lock_record_present": lock is not None,
+        "recorded_claimant": None,
+        "recorded_branch": None,
+        "recorded_worktree": None,
+        "lock_generation": None,
+        "local_head_sha": _text(state.get("head_sha")) or None,
+        "current_branch": _text(state.get("current_branch")) or None,
+        "dirty_tracked_files": [],
+        "untracked_files": [],
+        "worktree_registered": worktree_registered,
+        "remote_branch_exists": None,
+        "remote_head_sha": None,
+        "fast_forward_from_remote": None,
+        "competing_open_prs": [],
+        "file_hashes_verified": None,
+        "hash_mismatches": [],
+        # Recorded explicitly so no reader mistakes silence for a liveness
+        # claim, and so the audit shows which records were left alone (AC23/AC24).
+        "owner_pid_liveness_consulted": False,
+        "workflow_lease_touched": False,
+        "issue_lock_record_mutated": False,
+    }
+
+    # ── declared shape ────────────────────────────────────────────────────
+    if not branch:
+        reasons.append("branch name not declared; fail closed")
+    if not head:
+        reasons.append(
+            "expected_head not declared; publication must name the exact commit"
+        )
+    elif not _SHA_RE.match(head):
+        reasons.append(
+            f"expected_head '{head}' is not a full 40-character commit SHA; "
+            "abbreviated or symbolic revisions are refused"
+        )
+    if not workspace:
+        reasons.append("worktree path not declared; fail closed")
+
+    if branch:
+        match = ISSUE_BRANCH_RE.match(branch)
+        if not match:
+            reasons.append(
+                f"branch '{branch}' is not an issue-linked implementation branch "
+                "((fix|feat|docs|chore)/issue-<number>-<description>); fail closed"
+            )
+        elif int(match.group(2)) != int(issue_number):
+            reasons.append(
+                f"branch '{branch}' does not carry issue number {issue_number}; "
+                "fail closed"
+            )
+        if is_stable_ref(branch):
+            reasons.append(
+                f"refusing to publish stable branch '{branch}'; this operation "
+                "publishes issue branches only"
+            )
+
+    # ── ownership: durable issue-lock record only (AC8, AC20, AC24) ───────
+    if lock is None:
+        reasons.append(
+            "no durable issue-lock record for this issue; publication requires an "
+            "existing recorded claim naming the caller, so this operation cannot "
+            "be used to bypass the author lock"
+        )
+    else:
+        lease = lock.get("work_lease")
+        lease = lease if isinstance(lease, dict) else {}
+        claimant = lease.get("claimant")
+        claimant = claimant if isinstance(claimant, dict) else {}
+        recorded_user = _text(claimant.get("username"))
+        recorded_profile = _text(claimant.get("profile"))
+        recorded_branch = _text(lock.get("branch_name")) or _text(lease.get("branch"))
+        recorded_worktree = _realpath(
+            _text(lock.get("worktree_path")) or _text(lease.get("worktree_path"))
+        )
+        evidence["recorded_claimant"] = {
+            "username": recorded_user or None,
+            "profile": recorded_profile or None,
+        }
+        evidence["recorded_branch"] = recorded_branch or None
+        evidence["recorded_worktree"] = recorded_worktree
+        try:
+            evidence["lock_generation"] = int(lock.get("lock_generation") or 0)
+        except (TypeError, ValueError):
+            evidence["lock_generation"] = 0
+
+        try:
+            recorded_issue = int(lock.get("issue_number") or 0)
+        except (TypeError, ValueError):
+            recorded_issue = 0
+        if recorded_issue != int(issue_number):
+            reasons.append(
+                f"durable lock records issue {lock.get('issue_number')}, not "
+                f"{issue_number}; ambiguous ownership, fail closed"
+            )
+        for field, declared in (
+            ("remote", _text(remote)),
+            ("org", _text(org)),
+            ("repo", _text(repo)),
+        ):
+            recorded = _text(lock.get(field))
+            if recorded and declared and recorded != declared:
+                reasons.append(
+                    f"durable lock records {field} '{recorded}' but the request "
+                    f"declares '{declared}'; repository mismatch, fail closed"
+                )
+        if recorded_branch and branch and recorded_branch != branch:
+            reasons.append(
+                f"durable lock records branch '{recorded_branch}' but the request "
+                f"declares '{branch}'; fail closed"
+            )
+        if recorded_worktree and workspace and recorded_worktree != workspace:
+            reasons.append(
+                f"durable lock records worktree '{recorded_worktree}' but the "
+                f"request declares '{workspace}'; fail closed"
+            )
+        if not recorded_user or not recorded_profile:
+            reasons.append(
+                "durable lock does not record a claimant username and profile; "
+                "ownership cannot be proven, fail closed"
+            )
+        else:
+            if recorded_user != _text(identity):
+                reasons.append(
+                    f"durable lock claimant '{recorded_user}' is not the acting "
+                    f"identity '{_text(identity) or '(unknown)'}'; foreign claim, "
+                    "fail closed"
+                )
+            if recorded_profile != _text(profile):
+                reasons.append(
+                    f"durable lock claimant profile '{recorded_profile}' is not "
+                    f"the active profile '{_text(profile) or '(unknown)'}'; "
+                    "fail closed"
+                )
+
+    # ── worktree: registered, on-branch, clean, at the expected commit ────
+    if worktree_registered is False:
+        reasons.append(
+            f"worktree '{workspace}' is not listed in git worktree list; #713 "
+            "requires a genuinely registered worktree, fail closed"
+        )
+
+    current_branch = _text(state.get("current_branch"))
+    if not current_branch:
+        reasons.append("worktree branch could not be observed; fail closed")
+    elif branch and current_branch != branch:
+        reasons.append(
+            f"worktree is on branch '{current_branch}', not '{branch}'; fail closed"
+        )
+
+    porcelain = state.get("porcelain_status") or ""
+    dirty_tracked = parse_dirty_tracked_files(porcelain)
+    untracked = parse_untracked_files(porcelain)
+    evidence["dirty_tracked_files"] = dirty_tracked
+    evidence["untracked_files"] = untracked
+    if dirty_tracked:
+        reasons.append(
+            "worktree has dirty tracked files, so the commit is not the whole of "
+            f"the work: {', '.join(dirty_tracked)}. This operation publishes an "
+            "existing clean commit only; uncommitted content is out of scope"
+        )
+    if untracked:
+        reasons.append(
+            "worktree has untracked files that the commit does not carry: "
+            f"{', '.join(untracked)}. Publishing would silently leave them "
+            "behind; fail closed"
+        )
+
+    local_head = _text(state.get("head_sha")).lower()
+    if not local_head:
+        reasons.append("local HEAD could not be observed; fail closed")
+    elif head and local_head != head:
+        reasons.append(
+            f"worktree HEAD is {local_head} but the request declares {head}; the "
+            "local commit changed since it was recorded, fail closed"
+        )
+
+    # ── remote state ──────────────────────────────────────────────────────
+    probe = remote_probe if isinstance(remote_probe, dict) else {}
+    already_published = False
+    if not probe.get("probe_ok"):
+        reasons.append(
+            "remote branch head could not be observed; publication must not "
+            "proceed against an unknown remote state, fail closed"
+        )
+        reasons.extend(probe.get("reasons") or [])
+    else:
+        remote_exists = bool(probe.get("remote_branch_exists"))
+        remote_head = _text(probe.get("remote_head_sha")).lower() or None
+        evidence["remote_branch_exists"] = remote_exists
+        evidence["remote_head_sha"] = remote_head
+        if remote_exists and remote_head and head:
+            if remote_head == head:
+                already_published = True
+                evidence["fast_forward_from_remote"] = True
+            else:
+                anc = ancestry if isinstance(ancestry, dict) else {}
+                is_anc = bool(anc.get("probe_ok")) and bool(anc.get("is_ancestor"))
+                evidence["fast_forward_from_remote"] = is_anc
+                if not is_anc:
+                    reasons.append(
+                        f"remote branch '{branch}' already exists at {remote_head}, "
+                        f"which is not an ancestor of {head}; publishing would "
+                        "discard or rewrite published history, fail closed"
+                    )
+                    reasons.extend(anc.get("reasons") or [])
+        elif remote_exists and not remote_head:
+            reasons.append(
+                f"remote branch '{branch}' exists but its head could not be read; "
+                "fail closed"
+            )
+
+    # ── competing claims ──────────────────────────────────────────────────
+    competing = [p for p in (competing_open_prs or ()) if p]
+    evidence["competing_open_prs"] = list(competing)
+    if competing:
+        reasons.append(
+            f"open pull request(s) {competing} already claim issue {issue_number} "
+            "or this branch; ambiguous ownership, fail closed"
+        )
+
+    # ── content verification before publication ───────────────────────────
+    if expected_file_hashes:
+        observed = (
+            observed_file_hashes if isinstance(observed_file_hashes, dict) else {}
+        )
+        mismatches: list[str] = []
+        for path, expected_digest in dict(expected_file_hashes).items():
+            actual = observed.get(path)
+            if actual is None:
+                mismatches.append(f"{path}: missing or unreadable in the worktree")
+            elif _text(actual).lower() != _text(expected_digest).lower():
+                mismatches.append(
+                    f"{path}: expected {expected_digest}, observed {actual}"
+                )
+        evidence["hash_mismatches"] = mismatches
+        evidence["file_hashes_verified"] = not mismatches
+        if mismatches:
+            reasons.append(
+                "declared content hashes do not match the worktree: "
+                + "; ".join(mismatches)
+                + ". Refusing to publish content that is not what was recorded"
+            )
+
+    if reasons:
+        return {
+            "outcome": REFUSED,
+            "publish_sanctioned": False,
+            "already_published": False,
+            "reasons": reasons,
+            "evidence": evidence,
+        }
+    return {
+        "outcome": ALREADY_PUBLISHED if already_published else PUBLISH_SANCTIONED,
+        # Idempotent retry: a remote head that already equals the assessed commit
+        # needs no second push, so the caller verifies instead of acting.
+        "publish_sanctioned": not already_published,
+        "already_published": already_published,
+        "reasons": [],
+        "evidence": evidence,
+    }
+
+
+def publish_commit_to_remote_branch(
+    *,
+    worktree_path: str,
+    remote_name: str,
+    branch_name: str,
+    expected_head: str,
+) -> dict:
+    """Send exactly *expected_head* to ``refs/heads/<branch_name>``.
+
+    The refspec names the commit SHA explicitly rather than ``HEAD`` or the
+    local branch, so what lands is the commit that was assessed and nothing
+    else. No force, no lease, no ``+`` prefix: a non-fast-forward is rejected by
+    git itself, the last of several independent guards against overwriting
+    published history.
+    """
+    path = _text(worktree_path)
+    remote = _text(remote_name)
+    branch = _text(branch_name)
+    head = _text(expected_head)
+    result: dict = {
+        "success": False,
+        "pushed_ref": f"refs/heads/{branch}" if branch else None,
+        "pushed_sha": head or None,
+        "stderr": None,
+        "reasons": [],
+    }
+    if not (path and remote and branch and head):
+        result["reasons"].append(
+            "publication requires a worktree path, remote, branch, and commit SHA"
+        )
+        return result
+
+    refspec = f"{head}:refs/heads/{branch}"
+    try:
+        res = subprocess.run(
+            ["git", "-C", path, "push", remote, refspec],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+    except OSError as exc:
+        result["reasons"].append(f"publication could not run: {exc}")
+        return result
+
+    if res.returncode != 0:
+        # Redact before surfacing: failures can echo credentialed remote URLs.
+        result["stderr"] = redact_command(res.stderr or "")
+        result["reasons"].append(
+            f"publication of {head} to '{branch}' on remote '{remote}' failed"
+        )
+        return result
+
+    result["success"] = True
+    return result
+
+
+def verify_published_head(
+    *, worktree_path: str, remote_name: str, branch_name: str, expected_head: str
+) -> dict:
+    """Read-after-write: confirm the remote head equals *expected_head* (AC20)."""
+    probe = read_remote_branch_head(worktree_path, remote_name, branch_name)
+    head = _text(expected_head).lower()
+    observed = _text(probe.get("remote_head_sha")).lower() or None
+    verified = bool(head) and bool(probe.get("probe_ok")) and observed == head
+    reasons: list[str] = list(probe.get("reasons") or [])
+    if probe.get("probe_ok") and not verified:
+        reasons.append(
+            "read-after-write verification failed: remote head is "
+            f"{observed or '(absent)'}, expected {head}"
+        )
+    return {
+        "verified": verified,
+        "remote_head_sha": observed,
+        "expected_head": head or None,
+        "reasons": reasons,
+    }

docs/architecture/webui-control-plane-console-architecture-adr.md

@@ -0,0 +1,201 @@
+# ADR: MCP Control Plane Web Console architecture and information architecture
+
+- **Status:** Proposed (documentation only; blocks no code, gates every #631 child)
+- **Date:** 2026-07-22
+- **Tracking issue:** [#632](https://gitea.prgs.cc/Scaled-Tech-Consulting/Gitea-Tools/issues/632) — architecture and information architecture (Phase 1)
+- **Parent epic:** [#631](https://gitea.prgs.cc/Scaled-Tech-Consulting/Gitea-Tools/issues/631) — MCP Control Plane Web Console
+- **Foundation (closed, extend — do not recreate):** #425 tracker and children #426 skeleton, #427 projects, #428 prompts, #429 queue, #430 runtime, #431 audit paste, #432 worktrees, #433 leases, #434 gated actions, #435 auth/deployment boundary, #436 tests/CI
+- **Related:** `mcp-allocator-control-plane-observability-adr.md`, `mcp-stable-control-runtime-policy-adr.md`, `control-plane-db-substrate.md`, `../safety-model.md`, `../tool-boundaries.md`, `../credential-isolation.md`, `../webui-local-dev.md`, `../webui-deployment.md`
+
+## 1. Context
+
+The MVP web UI shipped under `webui/` as a read-only Starlette application with ten operator routes and a JSON export beside most of them. It is a working foundation, not the console product described by epic #631, and it carries no durable architecture record: no layer contract, no authority boundary, no API versioning rule, no page map, and no statement of which phase may open a write path.
+
+Twenty children (#632–#651) hang off #631. Without one architecture document each implementer re-derives boundaries, and the most likely failure is not a bad view — it is a privileged action wired into the browser before the authorization and audit model of #633 exists.
+
+This ADR is the single retrievable design source for the console. It decides structure only. It implements no UI, no API, and no change to deployment topology.
+
+## 2. Decision summary (core)
+
+| Layer | Owns | Must not |
+|-------|------|----------|
+| **Browser UI** | Rendering, navigation, operator affordances | Hold tokens, call Gitea/providers directly, or execute an action the server did not gate |
+| **HTTP route layer** (`webui/app.py`) | Versioned routing, authentication, authorization, redaction boundary, audit emission | Contain domain logic or reach past a loader to a raw credential |
+| **Domain loaders** (`webui/*_loader.py`, `*_scanner.py`, `runtime_health.py`, `project_registry.py`) | Assembling read models from authoritative sources | Mutate anything, or emit unredacted secrets across the boundary |
+| **Gitea** | Durable work record: issues, PRs, comments, reviews, labels, merges | Be the concurrency lock under multi-session load |
+| **Control-plane DB** | Sessions, assignment, leases, heartbeats, events | Replace Gitea history |
+| **MCP tools / capability gates** | Mutation authorization | Be re-implemented, mirrored, or bypassed by console code |
+| **External providers** (Sentry/GlitchTip, AI providers) | Incident and usage data | Assign work or mutate Gitea outside the #612 bridge |
+
+**One-liner:** **Gitea records. The DB coordinates. MCP tools authorize. The console projects state and executes only capability-checked, audited actions. Providers observe.**
+
+## 3. Console surface today versus target
+
+`webui/app.py` currently registers these routes (see `../webui-local-dev.md` for the operator-facing table): `/`, `/health`, `/queue`, `/projects`, `/projects/{id}`, `/prompts`, `/runtime`, `/audit`, `/worktrees`, `/leases`, `/actions`, and the unversioned exports `/api/queue`, `/api/projects`, `/api/prompts`, `/api/runtime`, `/api/audit`, `/api/worktrees`, `/api/leases`, `/api/actions`, `/api/actions/{id}/preview`, `/api/actions/{id}/attempt`.
+
+Every one of these is **retained and evolved**. No child issue may recreate a route from scratch; each states in its PR which MVP surface it extends and what it changes.
+
+## 4. Authority boundaries
+
+### 4.1 Gitea (durable record)
+
+Authoritative for issue and PR identity and state, comments, reviews and verdicts, labels, merges, and branch refs. When the console and Gitea disagree about durable state, Gitea wins and the console view is refreshed — never the reverse.
+
+### 4.2 Control-plane DB (coordination)
+
+Authoritative for live coordination: which session holds which assignment or lease, heartbeat freshness, expiry, and the allocation event log. The console reads it; only allocator and lease tools write it.
+
+### 4.3 MCP capability gates (authorization)
+
+`task_capability_map.py` and `gitea_resolve_task_capability` remain the only authority that decides whether a mutation may run. The console asks; it never answers. A console action that cannot name the MCP tool it delegates to is not an action — it is a defect.
+
+### 4.4 Filesystem and git (local state)
+
+Issue lock files, `branches/` worktrees, and registered git worktrees are read through existing scanners. The console never deletes, rebinds, or force-clears local state outside a Phase 2 gated action.
+
+### 4.5 Providers (observe only)
+
+Sentry/GlitchTip and AI providers are read surfaces. The #612 incident bridge is the only path that turns an observation into Gitea work.
+
+## 5. Request flow and the redaction boundary
+
+```text
+browser ──HTTP──> route layer ──> domain loader ──> Gitea REST
+                      │                        ├──> control-plane DB
+                      │                        ├──> filesystem / git
+                      │                        └──> providers
+                      │
+                 [redaction boundary]
+                      │
+                 audit event
+```
+
+| Stage | May hold credentials | Emits |
+|-------|----------------------|-------|
+| Loader → route layer | yes (server-side, via `gitea_auth`) | domain objects |
+| Route layer → browser | **no** | redacted DTOs, HTML |
+
+Two invariants govern the boundary and are non-negotiable for every child:
+
+1. **No secrets to the browser.** Tokens, keychain identifiers, Authorization headers, raw provider endpoints, and credential-bearing URLs are redacted by default, consistent with `../safety-model.md` §3 and `../credential-isolation.md`. Serializers redact; templates do not sanitize after the fact.
+2. **No ungated mutations.** A write reaches an authoritative system only by delegating to an MCP tool that passed its own capability gate. HTML forms and JSON endpoints are transport, never authority.
+
+## 6. API naming and versioning
+
+**Decision:** all console APIs added from Phase 1 onward are served under `/api/v1/...`.
+
+- Nouns are plural and hierarchical: `/api/v1/inventory/leases`, `/api/v1/system/health`.
+- Read endpoints are `GET` and side-effect free.
+- Phase 2 action endpoints are `POST /api/v1/actions/{action_id}/preview` and `POST /api/v1/actions/{action_id}/execute`; `preview` stays side-effect free and returns a mutation ledger.
+- The existing unversioned MVP exports remain as **compatibility aliases** for the whole of Phase 1 so the current operator flow never breaks. They may be retired no earlier than Phase 2, and only after the replacing `v1` route ships and `../webui-local-dev.md` records the swap.
+- A breaking change to a `v1` payload requires `/api/v2/...`, not an in-place edit.
+- Every JSON payload carries enough provenance for an auditor to tell where the data came from — at minimum the source system and whether the inventory was complete, matching the pagination-proof habit the MVP queue export already established.
+
+## 7. Page map
+
+| Page | Purpose | Owning child | Evolves |
+|------|---------|--------------|---------|
+| `/` | Console shell, navigation, next-safe-action summary | #638 | MVP `/` (#426) |
+| `/system` | System-health dashboard | #639 | new, backed by #634 |
+| `/traffic` | Workflow traffic control, queues, blockers | #640 | MVP `/queue` (#429) |
+| `/runtime` | Runtime and session view | #641 | MVP `/runtime` (#430) |
+| `/projects`, `/projects/{id}` | Project registry and onboarding | #635 | MVP `/projects` (#427) |
+| `/inventory` | Sessions, leases, locks, worktrees in one surface | #636 | MVP `/leases` (#433) + `/worktrees` (#432) |
+| `/timeline` | Workflow events and conversation timeline | #637 | new |
+| `/actions` | Gated action registry, preview, execution | #642, #643, #644 | MVP `/actions` (#434) |
+| `/gitea` | Issue and PR linkage console | #645 | new |
+| `/policy` | Guardrail visibility, then versioned editing | #646, #647 | new |
+| `/notifications` | Human-attention routing | #648 | new |
+| `/observability` | Sentry/GlitchTip correlation and durable issue creation | #649 | new |
+| `/providers` | AI-provider connections and insights | #650 | new |
+| `/analytics` | Usage, token cost, latency, workflow performance | #651 | new |
+| `/audit` | Final-report validator preview and audit log | #431 foundation, extended by #633 | MVP `/audit` (#431) |
+| `/prompts`, `/prompts/{id}` | Canonical prompt library | #638 | MVP `/prompts` (#428) |
+| `/health` | Liveness and deployment metadata | #634 | MVP `/health` (#435) |
+
+## 8. Component ownership for every epic child
+
+Each #631 child maps to at least one architectural component defined above.
+
+| Child | Capability area | Primary component | Phase |
+|-------|-----------------|-------------------|-------|
+| #632 | Architecture and information architecture | this ADR | 1 |
+| #633 | Authorization, RBAC, secret redaction, audit and retention | route layer + redaction boundary (§5) | 1 |
+| #634 | Read-only system-health API | `/api/v1/system/health` + health loader | 1 |
+| #635 | Project registry API evolution | `/api/v1/projects` + `project_registry.py` | 1 |
+| #636 | Session, lease, lock, worktree inventory API | `/api/v1/inventory/*` + `lease_loader.py`, `worktree_scanner.py` | 1 |
+| #637 | Workflow-event and conversation timeline model | `/api/v1/events` + control-plane DB event log | 1 |
+| #638 | Application shell evolution | browser UI layer + `layout.py` | 1 |
+| #639 | System-health dashboard | `/system` page over #634 | 1 |
+| #640 | Workflow traffic-control view | `/traffic` page over the queue loader | 1 |
+| #641 | Runtime and session view | `/runtime` page over `runtime_health.py` | 1 |
+| #642 | Sanctioned restart and graceful reload controls | gated action framework, restart class | 2 |
+| #643 | Requests, intent preview, authorization, workflow initiation | `/api/v1/actions/*` execute path | 2 |
+| #644 | Stale-runtime recovery, worktree rebinding, reconciliation controls | gated actions over filesystem/git authority | 2 |
+| #645 | Gitea issue and PR linkage console | `/gitea` page over Gitea authority | 3 |
+| #646 | Workflow policy and guardrail visibility | `/policy` read view over the capability map | 3 |
+| #647 | Versioned policy editing, validation, simulation, approval, rollback | `/policy` write path, gated | 3 |
+| #648 | Notifications and human-attention routing | notification component over the event model | 3 |
+| #649 | Sentry/GlitchTip connections, correlation, durable issue creation | provider layer + #612 incident bridge | 4 |
+| #650 | AI-provider connections and operational insights | provider layer | 4 |
+| #651 | Model usage, token cost, latency, workflow analytics | analytics component over the event model | 4 |
+
+Related but **outside** this epic: #667 (restart status, impact preview, and approval controls) belongs to the #655 restart-governance umbrella and must reuse the #642 action class rather than adding a second restart surface.
+
+## 9. Phase gates
+
+| Phase | May ship | Entry condition |
+|-------|----------|-----------------|
+| **1 — read-only visibility** | `GET` pages and `GET /api/v1/...` | this ADR accepted |
+| **2 — controlled actions** | gated `POST` action execution | #633 authorization, RBAC, and audit model landed |
+| **3 — orchestration and policy** | linkage, policy visibility, versioned policy editing | Phase 1 inventory plus the Phase 2 action framework |
+| **4 — insights** | provider correlation, analytics | evidence-backed sources from Phases 1–3 |
+
+Phase 1 must not open a mutation endpoint, and the read-only guard that returns `405 read-only-mvp` stays in force until the Phase 2 entry condition is met. A phase is not entered by exception; if a control is urgent, the entry condition is what gets prioritized.
+
+## 10. Security and workflow safety
+
+- **Fail closed** on unknown authentication, missing RBAC mapping, or ambiguous lease ownership. An unknown state renders as blocked, never as permitted.
+- **Redact by default**, per §5.
+- **Every privileged action** requires a resolved capability, an explicit operator confirmation, and a durable audit event naming actor, action, target, and outcome.
+- **Contamination surfaces.** Session contamination — including a manually killed MCP daemon (#630) — must be shown and must block clean claims rather than being silently repaired.
+- **Deployment boundary unchanged.** Loopback by default, with the existing refusal of public binds (#435). This ADR documents that target; it does not widen it.
+
+## 11. Forbidden paths
+
+These are rejected designs, not preferences:
+
+1. **Raw provider incidents as work.** The allocator never receives an unclassified Sentry/GlitchTip incident; only the #612 bridge turns an observation into a Gitea issue.
+2. **Browser-held tokens.** No credential, keychain identifier, or Authorization header is ever sent to the browser or embedded in a client bundle.
+3. **Process-kill recovery.** The console must not expose `pkill`, process-identifier termination, or any host process kill as a recovery affordance (#630). Restart is the sanctioned, operator-owned path of #642 and the #655 umbrella.
+4. **Ungated browser mutations.** No review, approval, merge, close, or comment may originate from the browser without passing an MCP capability gate.
+5. **Policy invented in the console.** The console projects policy from the capability map and canonical workflows; it never encodes a second copy.
+6. **Recreating MVP scope.** Re-implementing a #426–#436 surface without an explicit evolve-or-extend statement is out of bounds.
+
+## 12. Approval checklist (readable without chat history)
+
+A controller can accept or reject this ADR against these six points alone:
+
+1. Layers and their owners are defined (§2) and each authority is named (§4).
+2. The redaction boundary and the two invariants are stated (§5).
+3. API versioning is decided, including what happens to the existing unversioned routes (§6).
+4. A page map exists and names an owning child for every page (§7).
+5. Every #631 child maps to at least one component and one phase (§8).
+6. Phase gates and forbidden paths are explicit (§9, §11).
+
+## 13. Open questions and follow-ups
+
+Unresolved choices are recorded here rather than settled by implication. Each needs its own durable issue before the phase that depends on it:
+
+- **Authentication mechanism.** Whether the console authenticates via an access proxy (Cloudflare Access or equivalent) or an application-level session is deferred to #633. This ADR requires only that it fail closed.
+- **Event model substrate.** Whether the #637 timeline reads the control-plane event log directly or through a projection is deferred to #637.
+- **CI path filter coverage.** `webui/ci_paths.py` triggers the web UI suite on `webui/`, `tests/test_webui_*`, and `docs/webui*`. This ADR lives under `docs/architecture/`, so editing it alone does not trigger that gate; the accompanying `tests/test_webui_architecture_docs.py` does run in the full suite. Widening the filter is a small follow-up, deliberately not bundled into a documentation-only change.
+- **Retention.** Audit-event retention duration is owned by #633.
+
+## 14. Acceptance
+
+Accepting this ADR means:
+
+- Phase 1 children may proceed against the layers, page map, and API rules above.
+- Phase 2 children may not open a write path until #633 lands.
+- Any deviation is recorded as an amendment to this file with its own issue reference, not as an undocumented divergence in code.

docs/mcp-tool-inventory.md

@@ -120,6 +120,7 @@ that gates each call, not which tools exist.
 - `gitea_observability_list_projects`
 - `gitea_observability_reconcile_incident`
 - `gitea_post_heartbeat`
+- `gitea_publish_unpublished_issue_branch`
 - `gitea_quarantine_contaminated_review`
 - `gitea_reclaim_expired_workflow_lease`
 - `gitea_reconcile_already_landed_pr`

docs/webui-local-dev.md

@@ -37,6 +37,16 @@ Optional environment variables:
 See [webui-deployment.md](webui-deployment.md) for internal-only serving,
 Cloudflare Access/WARP/VPN guidance, and unsafe bind overrides (#435).
 
+See
+[architecture/webui-control-plane-console-architecture-adr.md](architecture/webui-control-plane-console-architecture-adr.md)
+for the console architecture: layer and authority boundaries, the redaction
+boundary, `/api/v1/...` versioning, the target page map, and the phase gates
+that govern when a write path may open (#632, epic #631).
+
+See [webui-project-registry-api.md](webui-project-registry-api.md) for the
+versioned project registry contract: registry schema versions 1 and 2, project
+status, onboarding checklist state, and the fail-closed error payloads (#635).
+
 ## Routes (MVP)
 
 | Path | Description |
@@ -45,9 +55,11 @@ Cloudflare Access/WARP/VPN guidance, and unsafe bind overrides (#435).
 | `/health` | JSON liveness (`status`, `service`, `mode`, `timestamp`) |
 | `/queue` | Live PR and issue queue dashboard (#429) |
 | `/api/queue` | JSON queue export with pagination metadata |
-| `/projects` | Project registry list (#427) |
+| `/projects` | Project registry list with status and onboarding progress (#427, #635) |
 | `/projects/{id}` | Project detail + onboarding checklist |
-| `/api/projects` | JSON registry export |
+| `/api/v1/projects` | Versioned JSON registry export (#635) |
+| `/api/v1/projects/{id}` | Versioned JSON project detail (#635) |
+| `/api/projects` | JSON registry export — unversioned Phase 1 alias of `/api/v1/projects` |
 | `/prompts` | Prompt library with per-prompt copy buttons (#428) |
 | `/api/prompts` | JSON prompt export with workflow hashes |
 | `/runtime` | MCP runtime health and stale detection (#430) |

docs/webui-project-registry-api.md

@@ -0,0 +1,213 @@
+# Project registry API (#635)
+
+Phase 1 of the [console architecture ADR](architecture/webui-control-plane-console-architecture-adr.md)
+gives the project registry a versioned, read-only API. This document is the
+field-by-field contract for that API and for the registry file behind it.
+
+Everything here is **read-only**. The console never writes the registry; an
+operator edits the JSON file, and an invalid file fails closed rather than
+rendering a partial inventory.
+
+## Routes
+
+| Route | Method | Description |
+|-------|--------|-------------|
+| `/api/v1/projects` | GET | Versioned registry export: all projects, with provenance |
+| `/api/v1/projects/{project_id}` | GET | Single project; `404` with `project_not_found` when unknown |
+| `/api/projects` | GET | Unversioned MVP alias (#427), retained for all of Phase 1 |
+| `/projects` | GET | HTML list — status and onboarding progress per project |
+| `/projects/{project_id}` | GET | HTML detail — identity, profiles, paths, checklist |
+
+Per ADR section 6 the unversioned alias may be retired no earlier than Phase 2,
+and only after this document and `webui-local-dev.md` record the swap. The alias
+returns the same payload as `/api/v1/projects`, including the legacy `version`
+and `source_path` keys #427 consumers already read.
+
+The HTML views render from the same DTO the JSON routes serialize
+(`project_to_dict`), so the console and the API cannot disagree about a
+project's status or onboarding progress.
+
+## Registry file
+
+Default location: `webui/data/projects.registry.json`. Override with the
+`WEBUI_PROJECT_REGISTRY` environment variable.
+
+Schema versions: **1** and **2** are accepted; **2** is current. A version 1
+file loads unchanged and is normalized with the documented defaults, so an
+existing operator registry keeps working without edits.
+
+### Root
+
+| Field | Type | Required | Notes |
+|-------|------|----------|-------|
+| `version` | int | yes | `1` or `2`. Anything else fails closed |
+| `projects` | array | yes | Must be non-empty |
+
+### Project
+
+| Field | Type | Required | Default | Notes |
+|-------|------|----------|---------|-------|
+| `id` | string | yes | — | Stable registry id used in URLs |
+| `repo_name` | string | yes | — | Gitea repository name |
+| `gitea_owner` | string | yes | — | Owning org or user |
+| `remote_host` | string | yes | — | Instance base URL, no credentials |
+| `remote_name` | string | no | `null` | Logical remote label, e.g. `prgs` (v2) |
+| `default_branch` | string | yes | — | Stable branch name |
+| `local_checkout_path` | string | yes | — | Control checkout path |
+| `status` | string | no | `active` | `active`, `onboarding`, `paused`, `archived` (v2) |
+| `profiles` | object | yes | — | Must map `author`, `reviewer`, `reconciler` |
+| `workflow_paths` | object | yes | — | Non-empty; label to repo-relative path |
+| `schema_paths` | object | no | `{}` | Label to repo-relative path |
+| `onboarding_checklist` | array | no | `[]` | See below |
+| `last_seen_health` | object | no | `null` | Redacted health only (v2) |
+
+### Onboarding step
+
+| Field | Type | Required | Default | Notes |
+|-------|------|----------|---------|-------|
+| `id` | string | yes | — | Stable step id |
+| `title` | string | yes | — | Short operator-facing label |
+| `description` | string | yes | — | Self-contained; assumes no chat history |
+| `state` | string | no | `pending` | `complete`, `pending`, `blocked`, `not_applicable` (v2) |
+| `required` | bool | no | `true` | Optional steps never block readiness (v2) |
+
+### Last-seen health
+
+| Field | Type | Required | Notes |
+|-------|------|----------|-------|
+| `status` | string | no (default `unknown`) | `healthy`, `degraded`, `unreachable`, `unknown` |
+| `checked_at` | string | no | ISO-8601 UTC timestamp, e.g. `2026-01-01T00:00:00Z` |
+| `detail` | string | no | Short redacted note |
+
+Health is recorded metadata, not a live probe: Phase 1 performs no outbound
+health checks. Endpoints, tokens, and keychain identifiers must never appear
+here.
+
+## Response shape
+
+`GET /api/v1/projects`:
+
+```json
+{
+  "api_version": "v1",
+  "schema_version": 2,
+  "version": 2,
+  "source_path": "/path/to/webui/data/projects.registry.json",
+  "source": {
+    "kind": "file",
+    "path": "/path/to/webui/data/projects.registry.json",
+    "inventory_complete": true
+  },
+  "project_count": 1,
+  "projects": [
+    {
+      "id": "example",
+      "repo_name": "Example",
+      "gitea_owner": "Org",
+      "repo_full_name": "Org/Example",
+      "remote_host": "https://gitea.example.invalid",
+      "remote_name": "example-remote",
+      "default_branch": "main",
+      "local_checkout_path": ".",
+      "status": "active",
+      "profiles": {"author": "...", "reviewer": "...", "reconciler": "..."},
+      "workflow_paths": {"skill": "skills/..."},
+      "schema_paths": {},
+      "onboarding_checklist": [
+        {
+          "id": "profiles",
+          "title": "Configure execution profiles",
+          "description": "...",
+          "state": "complete",
+          "required": true
+        }
+      ],
+      "onboarding_summary": {
+        "total": 1,
+        "complete": 1,
+        "pending": 0,
+        "blocked": 0,
+        "not_applicable": 0,
+        "required_outstanding": 0,
+        "onboarding_complete": true
+      },
+      "last_seen_health": null
+    }
+  ]
+}
+```
+
+`GET /api/v1/projects/{project_id}` returns `api_version`, `schema_version`,
+`source`, and a single `project` object with the same fields.
+
+The `source` block satisfies the ADR section 6 provenance rule: every payload
+states where the data came from and whether the inventory is complete. A
+file-backed registry is always complete — there is no pagination to truncate it.
+
+`onboarding_summary` is derived, never stored. `required_outstanding` counts
+steps that are `required` **and** in state `pending` or `blocked`;
+`onboarding_complete` is true when that count is zero.
+
+## Fail-closed errors
+
+Validation failures raise `RegistryError`, which routes render instead of a
+traceback.
+
+`404` — unknown project id on `/api/v1/projects/{project_id}`:
+
+```json
+{
+  "error": "project_not_found",
+  "project_id": "not-registered",
+  "known_project_ids": ["example"],
+  "remediation": "Request one of the known project ids, or add the project ...",
+  "source": {"kind": "file", "path": "...", "inventory_complete": true}
+}
+```
+
+`500` — invalid registry, on both the versioned route and the alias:
+
+```json
+{
+  "error": "registry_invalid",
+  "detail": "unsupported registry version: 42",
+  "remediation": "Set 'version' to one of 1, 2 (current schema is 2) ...",
+  "field_path": "version",
+  "source_path": "/path/to/registry.json"
+}
+```
+
+`field_path` points at the offending location (`projects[0].profiles.reconciler`,
+`projects[0].onboarding_checklist[2].state`, and so on). The HTML routes render
+the same detail, field, source, and remediation on a "Project registry
+unavailable" page.
+
+Conditions that fail closed:
+
+* file missing or unreadable;
+* invalid JSON (the remediation names line and column);
+* root not an object, or `projects` missing/empty;
+* unsupported `version`;
+* a credential-shaped key anywhere in the file (`token`, `*_secret`, `auth_*`, and similar);
+* a project missing a required field, or missing an `author`/`reviewer`/`reconciler` profile;
+* an unknown `status`, onboarding `state`, or health `status`.
+
+## Credential rule
+
+The registry stores redacted metadata only. Credential-shaped keys are
+rejected at load time, before any DTO is built, consistent with
+[safety-model.md](safety-model.md) and
+[credential-isolation.md](credential-isolation.md). Tokens live in the keychain
+and are resolved server-side by `gitea_auth`.
+
+## Migrating a version 1 registry
+
+1. Set `"version": 2`.
+2. Optionally add `"status"` per project (omitted means `active`).
+3. Optionally add `"remote_name"` per project.
+4. Optionally add `"state"` and `"required"` to each onboarding step (omitted
+   means `pending` and `true`).
+5. Optionally add `"last_seen_health"`.
+
+No step is mandatory: a version 1 file keeps loading. Bumping the version only
+declares that the file may use the v2 fields.

gitea_mcp_server.py

@@ -2024,6 +2024,7 @@ import review_quarantine  # noqa: E402  # #695 contaminated formal-review quaran
 import mcp_daemon_guard  # noqa: E402  # #695 native transport provenance
 import already_landed_reconcile  # noqa: E402
 import author_mutation_worktree  # noqa: E402
+import branch_publish  # noqa: E402  # #812 AC20 unpublished-commit publication
 import root_checkout_guard  # noqa: E402
 import workflow_scope_guard  # noqa: E402  # #683 production scope / force-on guards
 import stable_branch_push_guard  # noqa: E402
@@ -9082,6 +9083,253 @@ def gitea_commit_files(
     }
 
 
+def _publication_block(reasons: list[str], **extra) -> dict:
+    """Uniform fail-closed shape for publication refusals (#812 AC20)."""
+    payload = {
+        "success": False,
+        "performed": False,
+        "published": False,
+        "verified": False,
+        "outcome": branch_publish.REFUSED,
+        "reasons": reasons,
+        # State every record this operation left alone, so a refusal can never
+        # be misread as a lock mutation (#812 AC23).
+        "issue_lock_record_mutated": False,
+        "workflow_lease_touched": False,
+    }
+    payload.update(extra)
+    return payload
+
+
+@mcp.tool()
+def gitea_publish_unpublished_issue_branch(
+    issue_number: int,
+    branch_name: str,
+    worktree_path: str,
+    expected_head: str,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+    git_remote_name: str | None = None,
+    expected_file_hashes: dict | None = None,
+    dry_run: bool = False,
+) -> dict:
+    """Publish an already-committed, unpublished issue branch (#812 AC20).
+
+    Creates the remote head for a branch whose work is *already* a local commit
+    on a registered, clean worktree, so exact-owner lease renewal
+    (``issue_lock_renewal``) has the published head its evidence model requires.
+    This is the one step of the entry point B deadlock that no existing tool can
+    perform: publication is otherwise lock-derived under #618, and the lock
+    itself is withheld until a remote head exists.
+
+    Not a lock bypass. The branch's **durable issue-lock record must already
+    name the caller as claimant** — ownership is read from the lock file, never
+    asserted by the caller — so this can only publish work the caller already
+    owns. It refuses a dirty or untracked-carrying worktree, an unregistered
+    worktree, a changed local HEAD, a remote head that is not an ancestor of the
+    commit, a competing open PR on another branch for the same issue, and any
+    declared-hash mismatch. It renews, reclaims, and clears nothing: the durable
+    issue-lock file and the control-plane workflow lease are both left untouched
+    (#812 AC23), and the recorded owner pid's liveness is never consulted or
+    asserted (#812 AC24).
+
+    Args:
+        issue_number: The issue whose recorded claim authorizes publication.
+        branch_name: Issue branch to publish, ``(fix|feat|docs|chore)/issue-N-…``.
+        worktree_path: Registered worktree holding the commit.
+        expected_head: Full 40-character SHA of the commit to publish. Required:
+            publication names the exact commit, and a mismatch fails closed.
+        remote: Known instance — 'dadeschools' or 'prgs'.
+        host: Override the Gitea host.
+        org: Override the owner/organization.
+        repo: Override the repository name.
+        git_remote_name: Git remote to publish to; defaults to *remote*.
+        expected_file_hashes: Optional ``{path: sha256}`` verified against the
+            worktree before publication. Any mismatch or missing file refuses.
+        dry_run: Report the decision and evidence, mutate nothing.
+
+    Returns:
+        dict with 'success', 'performed', 'published', 'verified', 'outcome',
+        'remote_head_sha', 'reasons', and 'evidence'.
+    """
+    task = "publish_unpublished_branch"
+    ok, block_reasons = role_session_router.check_author_mutation_after_reviewer_stop(
+        task
+    )
+    if not ok:
+        return _publication_block(block_reasons)
+
+    blocked = _namespace_mutation_block(task, remote=remote)
+    if blocked:
+        return blocked
+    blocked = _profile_permission_block(
+        task_capability_map.required_permission(task),
+        remote=remote, host=host, org=org, repo=repo,
+        org_explicit=org is not None,
+        repo_explicit=repo is not None,
+    )
+    if blocked:
+        return blocked
+
+    # #815: resolve the caller's worktree *before* preflight and forward it, so
+    # every workspace-resolution layer behind verify_preflight_purity — including
+    # the #618 branches-only guard — judges the registered issue worktree this
+    # publication actually operates on. Resolving it afterwards let preflight
+    # fall back to the MCP process root, so a daemon rooted at the stable control
+    # checkout refused a valid explicit worktree before the assessor ever ran.
+    # A caller supplying nothing usable forwards None and keeps the ordinary
+    # fail-closed fallback.
+    explicit_worktree = (worktree_path or "").strip()
+    workspace = os.path.realpath(os.path.abspath(explicit_worktree or "."))
+
+    verify_preflight_purity(
+        remote,
+        worktree_path=workspace if explicit_worktree else None,
+        task=task,
+        org=org,
+        repo=repo,
+    )
+
+    h, o, r = _resolve(remote, host, org, repo)
+    git_remote = (git_remote_name or remote or "").strip()
+
+    existing_lock = issue_lock_store.load_issue_lock(
+        remote=remote, org=o, repo=r, issue_number=int(issue_number)
+    )
+    git_state = issue_lock_worktree.read_worktree_git_state(workspace)
+    registered = author_mutation_worktree.path_in_git_worktree_list(
+        workspace, PROJECT_ROOT
+    )
+
+    remote_probe = branch_publish.read_remote_branch_head(
+        workspace, git_remote, branch_name
+    )
+    ancestry = None
+    probe_head = (remote_probe.get("remote_head_sha") or "").strip()
+    if probe_head and probe_head.lower() != (expected_head or "").strip().lower():
+        ancestry = branch_publish.read_is_ancestor(workspace, probe_head, expected_head)
+
+    # A PR on this very branch is this work's own PR, not a rival claim. Only an
+    # open PR for the same issue on a *different* branch is a competing claim.
+    competing: list = []
+    for pull in _list_open_pulls(h, o, r, _auth(h)):
+        ref = str((pull.get("head") or {}).get("ref") or "")
+        if not ref or ref == branch_name:
+            continue
+        if issue_lock_adoption.branch_carries_issue_marker(ref, int(issue_number)):
+            competing.append(pull.get("number"))
+
+    observed_hashes = None
+    if expected_file_hashes:
+        observed_hashes = branch_publish.hash_worktree_files(
+            workspace, list(expected_file_hashes.keys())
+        )
+
+    claimant = _work_lease_claimant(h)
+    assessment = branch_publish.assess_unpublished_commit_publication(
+        existing_lock,
+        issue_number=int(issue_number),
+        branch_name=branch_name,
+        worktree_path=workspace,
+        expected_head=expected_head,
+        remote=remote,
+        org=o,
+        repo=r,
+        identity=claimant.get("username"),
+        profile=claimant.get("profile"),
+        worktree_state=git_state,
+        worktree_registered=registered,
+        remote_probe=remote_probe,
+        ancestry=ancestry,
+        competing_open_prs=competing,
+        expected_file_hashes=expected_file_hashes,
+        observed_file_hashes=observed_hashes,
+    )
+
+    if assessment["outcome"] == branch_publish.REFUSED:
+        return _publication_block(
+            assessment["reasons"], evidence=assessment["evidence"]
+        )
+
+    if dry_run:
+        return {
+            "success": True,
+            "performed": False,
+            "published": False,
+            "verified": False,
+            "dry_run": True,
+            "outcome": assessment["outcome"],
+            "would_publish": assessment["publish_sanctioned"],
+            "remote_head_sha": assessment["evidence"].get("remote_head_sha"),
+            "reasons": [],
+            "evidence": assessment["evidence"],
+            "issue_lock_record_mutated": False,
+            "workflow_lease_touched": False,
+        }
+
+    performed = False
+    if assessment["publish_sanctioned"]:
+        with _audited(
+            task, host=h, remote=remote, org=o, repo=r,
+            target_branch=branch_name,
+            request_metadata={
+                "issue_number": int(issue_number),
+                "expected_head": expected_head,
+                "git_remote": git_remote,
+            },
+        ):
+            push = branch_publish.publish_commit_to_remote_branch(
+                worktree_path=workspace,
+                remote_name=git_remote,
+                branch_name=branch_name,
+                expected_head=expected_head,
+            )
+        if not push.get("success"):
+            return _publication_block(
+                push.get("reasons") or ["publication failed"],
+                evidence=assessment["evidence"],
+                stderr=push.get("stderr"),
+            )
+        performed = True
+
+    verification = branch_publish.verify_published_head(
+        worktree_path=workspace,
+        remote_name=git_remote,
+        branch_name=branch_name,
+        expected_head=expected_head,
+    )
+    if not verification.get("verified"):
+        return _publication_block(
+            verification.get("reasons") or ["read-after-write verification failed"],
+            evidence=assessment["evidence"],
+            performed=performed,
+            published=performed,
+            remote_head_sha=verification.get("remote_head_sha"),
+        )
+
+    return {
+        "success": True,
+        "performed": performed,
+        "published": True,
+        "verified": True,
+        "outcome": assessment["outcome"],
+        "remote_head_sha": verification.get("remote_head_sha"),
+        "reasons": [],
+        "evidence": assessment["evidence"],
+        # Publication is the whole of this operation's authority (#812 AC23).
+        "issue_lock_record_mutated": False,
+        "workflow_lease_touched": False,
+        "exact_next_action": (
+            f"Remote head for '{branch_name}' is now observable. Call "
+            f"gitea_lock_issue(issue_number={int(issue_number)}, "
+            f"branch_name='{branch_name}', worktree_path='{workspace}') to renew "
+            "the exact-owner lease, then gitea_create_pr."
+        ),
+    }
+
+
 # Merge methods supported by the Gitea merge API.
 _MERGE_METHODS = ("merge", "squash", "rebase")
 
@@ -12536,10 +12784,39 @@ def _try_auto_switch_for_operation(op: str, host: str | None = None) -> bool:
     return False
 
 
+def _git_default_remote_name(root: str) -> str:
+    """First configured git remote name for *root*, defaulting to 'origin'.
+
+    Used to resolve the live remote master target for parity (#610). Best
+    effort: any failure falls back to 'origin' so callers never raise.
+    """
+    try:
+        res = subprocess.run(
+            ["git", "-C", root, "remote"],
+            capture_output=True, text=True, check=False,
+        )
+    except Exception:
+        return "origin"
+    if res.returncode != 0:
+        return "origin"
+    names = [n.strip() for n in (res.stdout or "").splitlines() if n.strip()]
+    return names[0] if names else "origin"
+
+
 def _current_master_parity() -> dict:
-    """Assess this process's code against the on-disk master HEAD (#420)."""
+    """Assess this process's code against local and live remote master (#420/#610).
+
+    Compares the daemon's startup commit, the on-disk checkout HEAD, and the
+    live remote master target. A stale daemon relative to live master fails
+    closed for mutations even when the local checkout HEAD still matches the
+    startup commit. The live-remote read is best effort: an unresolved live
+    head leaves read-only diagnostics unblocked but is never mutation-safe.
+    """
     current_head = master_parity_gate.read_git_head(PROJECT_ROOT)
-    return master_parity_gate.assess_master_parity(_STARTUP_PARITY, current_head)
+    live_head = master_parity_gate.read_remote_master_head(
+        PROJECT_ROOT, remote=_git_default_remote_name(PROJECT_ROOT))
+    return master_parity_gate.assess_master_parity(
+        _STARTUP_PARITY, current_head, live_remote_head=live_head)
 
 
 def _current_runtime_mode_report(refresh: bool = False) -> dict:
@@ -16480,10 +16757,29 @@ def gitea_get_runtime_context(
         "restart_required": parity["restart_required"],
         "startup_head": parity["startup_head"],
         "current_head": parity["current_head"],
+        # #610 distinguished mutation-safety signals:
+        "daemon_start_head": parity["daemon_start_head"],
+        "local_head": parity["local_head"],
+        "live_remote_head": parity["live_remote_head"],
+        "live_known": parity["live_known"],
+        "live_stale": parity["live_stale"],
+        "mutation_safe": parity["mutation_safe"],
         "summary": master_parity_gate.format_parity(parity),
         "mutation_gate_enforced": not master_parity_gate.gate_disabled(),
+        # #610: the capability resolver is authoritative for mutation safety;
+        # local parity alone must never authorize a mutation.
+        "resolver_authoritative_for_mutation_safety": True,
     }
-    if parity["stale"] and not master_parity_gate.gate_disabled():
+    if parity["restart_required"] and not master_parity_gate.gate_disabled():
+        if parity["live_stale"]:
+            safe_next_action = (
+                "Daemon is stale relative to LIVE remote master "
+                f"(started {parity['startup_head'][:12] if parity['startup_head'] else 'unknown'}, "
+                f"live master {parity['live_remote_head'][:12] if parity['live_remote_head'] else 'unknown'}); "
+                "restart/reconnect the Gitea MCP server before mutating. The "
+                "capability resolver is authoritative for mutation safety."
+            )
+        else:
             safe_next_action = (
                 "Server code is stale relative to master; restart the Gitea MCP "
                 "server to load current capability gates before mutating. "
@@ -16537,6 +16833,13 @@ def gitea_assess_master_parity(
         "determinable": parity["determinable"],
         "startup_head": parity["startup_head"],
         "current_head": parity["current_head"],
+        # #610 distinguished mutation-safety signals:
+        "daemon_start_head": parity["daemon_start_head"],
+        "local_head": parity["local_head"],
+        "live_remote_head": parity["live_remote_head"],
+        "live_known": parity["live_known"],
+        "live_stale": parity["live_stale"],
+        "mutation_safe": parity["mutation_safe"],
         "mutation_gate_enforced": enforced,
         "summary": master_parity_gate.format_parity(parity),
         "reasons": parity["reasons"],
@@ -16553,7 +16856,7 @@ def gitea_assess_master_parity(
             source=canonical_source,
         ),
     }
-    if parity["stale"] and enforced:
+    if parity["restart_required"] and enforced:
         out["report"] = master_parity_gate.parity_report(parity)
     return out
 

master_parity_gate.py

@@ -24,12 +24,50 @@ from __future__ import annotations
 
 import os
 import subprocess
+import time
+
+# Live-remote head cache: the parity gate runs on every mutation and every
+# runtime-context read, so the ``git ls-remote`` result is cached briefly to
+# avoid a network round-trip per call (#610). Keyed by (root, remote, branch).
+_REMOTE_HEAD_CACHE: dict[tuple[str, str, str], tuple[float, str | None]] = {}
+_REMOTE_HEAD_TTL = 60.0
+
+# When True, ``read_remote_master_head`` never performs ``git ls-remote`` unless
+# ``GITEA_TEST_LIVE_REMOTE_HEAD`` is set. Conftest enables this suite-wide so
+# feature worktrees (whose HEAD differs from live master) cannot flip legacy
+# runtime-context assertions to live_stale, and so unit tests never depend on
+# a live network (PR #788 F1/F2 / issue #610). Module-level (not env-only) so
+# ``patch.dict(os.environ, …, clear=True)`` cannot re-enable the probe.
+_HERMETIC_TEST_MODE: bool = False
+
+
+def _clear_remote_head_cache() -> None:
+    """Reset the live-remote head cache (test isolation / forced refresh)."""
+    _REMOTE_HEAD_CACHE.clear()
+
+
+def set_hermetic_test_mode(enabled: bool) -> None:
+    """Enable or disable suite-wide hermetic live-remote reads (tests only)."""
+    global _HERMETIC_TEST_MODE
+    _HERMETIC_TEST_MODE = bool(enabled)
+    _clear_remote_head_cache()
+
+
+def hermetic_test_mode() -> bool:
+    """Return whether hermetic live-remote reads are active."""
+    return bool(_HERMETIC_TEST_MODE)
+
 
 # Environment escape hatches (ops + tests):
 #   GITEA_MCP_DISABLE_PARITY_GATE  -> disable enforcement entirely (fail open).
 #   GITEA_TEST_CURRENT_HEAD        -> force the "current" HEAD read, for tests.
 ENV_DISABLE = "GITEA_MCP_DISABLE_PARITY_GATE"
 ENV_TEST_CURRENT_HEAD = "GITEA_TEST_CURRENT_HEAD"
+# GITEA_TEST_LIVE_REMOTE_HEAD -> force the live remote master read, for tests.
+ENV_TEST_LIVE_REMOTE_HEAD = "GITEA_TEST_LIVE_REMOTE_HEAD"
+# GITEA_TEST_ALLOW_LIVE_REMOTE_PROBE -> opt a single test into a real ls-remote
+# even when hermetic mode is on (rare; prefer ENV_TEST_LIVE_REMOTE_HEAD).
+ENV_TEST_ALLOW_LIVE_REMOTE_PROBE = "GITEA_TEST_ALLOW_LIVE_REMOTE_PROBE"
 
 
 def read_git_head(root: str) -> str | None:
@@ -58,6 +96,75 @@ def read_git_head(root: str) -> str | None:
     return (res.stdout or "").strip() or None
 
 
+def read_remote_master_head(
+    root: str,
+    remote: str = "origin",
+    branch: str = "master",
+    ttl: float = _REMOTE_HEAD_TTL,
+) -> str | None:
+    """Return the live remote ``branch`` commit SHA, or ``None`` (#610).
+
+    Resolves the *live* target commit via ``git ls-remote`` so parity can tell
+    a daemon that is behind the live remote master apart from one whose local
+    checkout simply hasn't been pulled. ``None`` means the live head could not
+    be resolved (offline, no such remote, git unavailable, error) -- callers
+    must treat unknown live state as *not mutation-safe* while never blocking
+    read-only diagnostics. A ``GITEA_TEST_LIVE_REMOTE_HEAD`` override takes
+    precedence so the wiring can be exercised deterministically and offline.
+
+    The result is cached for *ttl* seconds per (root, remote, branch) so the
+    gate does not run a network probe on every mutation/read (``ttl=0`` forces
+    a live probe). Both hits and ``None`` misses are cached to bound offline
+    latency; the env override bypasses the cache and the subprocess entirely.
+
+    Under suite hermetic mode (``set_hermetic_test_mode(True)``, set by
+    conftest) a missing override returns ``None`` without network I/O so
+    feature-worktree test runs cannot observe live_stale against real master
+    (PR #788 F1) and unit tests stay offline (F2). Opt out with an explicit
+    ``GITEA_TEST_LIVE_REMOTE_HEAD`` pin or ``GITEA_TEST_ALLOW_LIVE_REMOTE_PROBE``.
+    """
+    forced = os.environ.get(ENV_TEST_LIVE_REMOTE_HEAD)
+    if forced is not None:
+        return forced.strip() or None
+    if _HERMETIC_TEST_MODE and not (
+        os.environ.get(ENV_TEST_ALLOW_LIVE_REMOTE_PROBE) or ""
+    ).strip():
+        # Hermetic default: live head unknown. live_stale stays False;
+        # mutation_safe is False when live is unknown (documented #610 note).
+        return None
+    # Defense in depth: even without the module flag, never probe while pytest
+    # is running unless the test opted into a real probe or set an override.
+    if (os.environ.get("PYTEST_CURRENT_TEST") or "").strip() and not (
+        os.environ.get(ENV_TEST_ALLOW_LIVE_REMOTE_PROBE) or ""
+    ).strip():
+        return None
+    if not root:
+        return None
+    key = (root, remote, branch)
+    now = time.monotonic()
+    if ttl > 0:
+        cached = _REMOTE_HEAD_CACHE.get(key)
+        if cached is not None and (now - cached[0]) < ttl:
+            return cached[1]
+    sha: str | None = None
+    try:
+        res = subprocess.run(
+            ["git", "-C", root, "ls-remote", remote, f"refs/heads/{branch}"],
+            capture_output=True,
+            text=True,
+            check=False,
+            timeout=5,
+        )
+        if res.returncode == 0:
+            lines = (res.stdout or "").strip().splitlines()
+            if lines:
+                sha = lines[0].split("\t", 1)[0].split()[0].strip() or None
+    except Exception:
+        sha = None
+    _REMOTE_HEAD_CACHE[key] = (now, sha)
+    return sha
+
+
 def capture_startup_parity(root: str, head: str | None = None) -> dict:
     """Capture the process source-tree baseline once at server startup.
 
@@ -72,18 +179,38 @@ def _short(sha: str | None) -> str:
     return sha[:12] if sha else "unknown"
 
 
-def assess_master_parity(startup: dict | None, current_head: str | None) -> dict:
+def assess_master_parity(
+    startup: dict | None,
+    current_head: str | None,
+    live_remote_head: str | None = None,
+) -> dict:
     """Compare the startup baseline against the current on-disk ``HEAD``.
 
-    Pure: both HEADs are supplied by the caller. Returns a structured result:
+    Pure: all HEADs are supplied by the caller. Returns a structured result:
 
     - ``in_parity``    -- server code matches the on-disk master (or parity
       could not be determined, which is not treated as stale).
     - ``stale``        -- the on-disk master has definitively advanced past the
       running process.
-    - ``restart_required`` -- alias of ``stale``; the recovery action.
-    - ``determinable`` -- whether both HEADs were known well enough to compare.
+    - ``restart_required`` -- ``stale`` or ``live_stale``; the recovery action.
+    - ``determinable`` -- whether both local HEADs were known well enough to
+      compare.
     - ``startup_head`` / ``current_head`` / ``reasons``.
+
+    #610 adds live-remote awareness so a daemon that is stale relative to the
+    *live* remote master cannot report a mutation-safe result even when the
+    local checkout HEAD still matches the daemon's startup commit:
+
+    - ``daemon_start_head`` -- the commit the running process started at
+      (alias of ``startup_head``, named for clarity in reports).
+    - ``local_head`` -- the on-disk checkout HEAD (alias of ``current_head``).
+    - ``live_remote_head`` -- the live remote target commit, or ``None`` when it
+      could not be fetched.
+    - ``live_known`` -- whether the live remote target was resolved.
+    - ``live_stale`` -- the live remote master has advanced past the running
+      process (daemon is behind live master) even if local parity is green.
+    - ``mutation_safe`` -- the daemon code, local checkout, and live remote
+      target all agree; the only state in which a mutation may rely on parity.
     """
     startup_head = (startup or {}).get("startup_head")
     reasons: list[str] = []
@@ -91,32 +218,56 @@ def assess_master_parity(startup: dict | None, current_head: str | None) -> dict
     if startup_head is None:
         reasons.append(
             "startup commit was not captured; code parity cannot be enforced")
-        return _result(True, False, False, startup_head, current_head, reasons)
+        return _result(True, False, False, startup_head, current_head,
+                       live_remote_head, False, reasons)
 
     if current_head is None:
         reasons.append(
             "current workspace HEAD could not be read; code parity cannot be "
             "enforced")
-        return _result(True, False, False, startup_head, current_head, reasons)
-
-    if startup_head == current_head:
-        return _result(True, False, True, startup_head, current_head, reasons)
+        return _result(True, False, False, startup_head, current_head,
+                       live_remote_head, False, reasons)
 
+    local_in_parity = startup_head == current_head
+    local_stale = not local_in_parity
+    if local_stale:
         reasons.append(
-        f"MCP server started at commit {_short(startup_head)} but the workspace "
-        f"master is now {_short(current_head)}; restart the server to load the "
-        f"current capability gates")
-    return _result(False, True, True, startup_head, current_head, reasons)
+            f"MCP server started at commit {_short(startup_head)} but the "
+            f"workspace master is now {_short(current_head)}; restart the "
+            f"server to load the current capability gates")
+
+    live_known = live_remote_head is not None
+    live_stale = live_known and live_remote_head != startup_head
+    if live_stale:
+        reasons.append(
+            f"live remote master is {_short(live_remote_head)} but the MCP "
+            f"server started at {_short(startup_head)}; the daemon is stale "
+            f"relative to live master -- restart/reconnect before mutating")
+
+    return _result(
+        local_in_parity, local_stale, True, startup_head, current_head,
+        live_remote_head, live_stale, reasons)
 
 
-def _result(in_parity, stale, determinable, startup_head, current_head, reasons):
+def _result(in_parity, stale, determinable, startup_head, current_head,
+            live_remote_head, live_stale, reasons):
+    live_known = live_remote_head is not None
+    mutation_safe = (
+        determinable and in_parity and live_known and not live_stale)
     return {
         "in_parity": in_parity,
         "stale": stale,
-        "restart_required": stale,
+        "restart_required": stale or live_stale,
         "determinable": determinable,
         "startup_head": startup_head,
         "current_head": current_head,
+        # #610 distinguished signals:
+        "daemon_start_head": startup_head,
+        "local_head": current_head,
+        "live_remote_head": live_remote_head,
+        "live_known": live_known,
+        "live_stale": live_stale,
+        "mutation_safe": mutation_safe,
         "reasons": list(reasons),
     }
 
@@ -130,11 +281,13 @@ def parity_block_reasons(assessment: dict) -> list[str]:
     """Block reasons for a mutation gate (empty when the mutation may proceed).
 
     A disabled gate or an in-parity / non-determinable assessment yields no
-    reasons; only a definitively stale server blocks.
+    reasons. A definitively stale server blocks, and (#610) a daemon that is
+    stale relative to the *live* remote master blocks even when the local
+    checkout HEAD still matches the daemon's startup commit.
     """
     if gate_disabled():
         return []
-    if assessment.get("stale"):
+    if assessment.get("stale") or assessment.get("live_stale"):
         return list(assessment.get("reasons") or
                     ["server code is stale relative to master (fail closed)"])
     return []
@@ -147,6 +300,10 @@ def parity_report(assessment: dict) -> dict:
         "restart_required": True,
         "startup_head": assessment.get("startup_head"),
         "current_head": assessment.get("current_head"),
+        # #610: name the live remote target so the report distinguishes a
+        # local-code stale from a daemon-behind-live-master stale.
+        "live_remote_head": assessment.get("live_remote_head"),
+        "live_stale": bool(assessment.get("live_stale")),
         "reasons": list(assessment.get("reasons") or []),
         "recovery": [
             "The running MCP server is executing code older than the current "
@@ -157,6 +314,45 @@ def parity_report(assessment: dict) -> dict:
     }
 
 
+def parity_resolver_disagreement(
+    assessment: dict,
+    resolver_restart_required: bool,
+) -> dict | None:
+    """Typed blocker when the resolver requires restart but parity looks green.
+
+    The capability resolver (``gitea_resolve_task_capability``) detects stale
+    runtime authoritatively for mutation safety (#610). When it requires a
+    restart, local-only parity must never override it: this returns a typed,
+    fail-closed blocker that names the resolver as authoritative. Returns
+    ``None`` when the resolver does not require a restart.
+    """
+    if not resolver_restart_required:
+        return None
+    parity_optimistic = bool(assessment.get("in_parity")) and not (
+        assessment.get("stale") or assessment.get("live_stale"))
+    return {
+        "kind": "parity_resolver_disagreement",
+        "restart_required": True,
+        "resolver_authoritative": True,
+        "parity_optimistic": parity_optimistic,
+        "daemon_start_head": assessment.get("daemon_start_head"),
+        "local_head": assessment.get("local_head"),
+        "live_remote_head": assessment.get("live_remote_head"),
+        "reasons": [
+            "The capability resolver requires a restart/reconnect (stale "
+            "runtime) but master-parity reported local code as in-parity. "
+            "The resolver is authoritative for mutation safety; do not mutate "
+            "on local parity alone. Restart/reconnect the Gitea MCP server "
+            "and re-verify before mutating.",
+        ],
+        "recovery": [
+            "Trust the resolver: treat this session as stale.",
+            "Restart or /mcp reconnect the Gitea MCP namespace so it reloads "
+            "current master and live target state, then re-run preflight.",
+        ],
+    }
+
+
 def format_parity(assessment: dict) -> str:
     """One-line human summary for logs / runtime context."""
     if assessment.get("stale"):

task_capability_map.py

@@ -62,6 +62,14 @@ TASK_CAPABILITY_MAP: dict[str, dict[str, str]] = {
         "permission": "gitea.branch.push",
         "role": "author",
     },
+    # #812 AC20: publish an already-committed, unpublished local head so
+    # exact-owner lease renewal has an observable remote head to reason about.
+    # Same authority as any other author push — deliberately not a new
+    # operation name, so it cannot widen an already-configured author profile.
+    "publish_unpublished_branch": {
+        "permission": "gitea.branch.push",
+        "role": "author",
+    },
     "create_pr": {
         "permission": "gitea.pr.create",
         "role": "author",
@@ -500,6 +508,7 @@ ROLE_EXCLUSIVE_TASKS: frozenset[str] = frozenset(
         "gitea_release_merger_pr_lease",
         "create_branch",
         "push_branch",
+        "publish_unpublished_branch",
         "create_pr",
         "commit_files",
         "gitea_commit_files",

tests/conftest.py

@@ -167,6 +167,35 @@ def _reset_mutation_authority(monkeypatch):
 import pytest
 
 
+@pytest.fixture(autouse=True)
+def _hermetic_live_remote_master_head():
+    """#610 / PR #788 F1/F2: keep live-remote parity reads offline in tests.
+
+    ``read_remote_master_head`` would otherwise ``git ls-remote`` whenever
+    ``GITEA_TEST_LIVE_REMOTE_HEAD`` is unset. Feature worktrees under
+    ``branches/`` always differ from live master, so legacy suites that assert
+    runtime-context ``safe_next_action`` flip to live_stale. Module-level
+    hermetic mode survives ``patch.dict(os.environ, …, clear=True)``.
+    Tests that exercise the real probe path call
+    ``master_parity_gate.set_hermetic_test_mode(False)`` and/or set
+    ``GITEA_TEST_ALLOW_LIVE_REMOTE_PROBE``.
+    """
+    try:
+        import master_parity_gate as _mpg
+
+        _mpg.set_hermetic_test_mode(True)
+    except Exception:
+        _mpg = None
+    try:
+        yield
+    finally:
+        if _mpg is not None:
+            try:
+                _mpg.set_hermetic_test_mode(False)
+            except Exception:
+                pass
+
+
 @pytest.fixture(autouse=True)
 def _deterministic_workspace_remotes():
     try:

tests/test_arch01_platform.py

@@ -0,0 +1,572 @@
+"""Executable acceptance tests for ARCH-01 Slice A (#822).
+
+Each acceptance criterion (#822 §12) and named test (#822 §13) is exercised
+against a real SQLite database. The migration runs on a fresh DB in ``setUp``;
+the test-run output is the durable evidence the issue requires (§14).
+
+Enforcement being proven:
+
+* ``[TRUSTED-SERVICE]`` — the ``cp_*`` actor functions exist only on the
+  trusted kernel connection; a raw connection cannot satisfy the triggers.
+* ``[SCHEMA]`` — fail-closed aborts, exact dominance set, NOT-NULL class,
+  immutability, and the last-active-grant floor are enforced by
+  CHECK/FK/trigger, verified here including raw-write bypass and concurrency.
+"""
+
+from __future__ import annotations
+
+import os
+import sqlite3
+import tempfile
+import threading
+import unittest
+from concurrent.futures import ThreadPoolExecutor
+
+import arch01_platform as ap
+from arch01_platform import (
+    ALREADY_INSTALLED,
+    AUTHORIZATION_DENIED,
+    CONCURRENT_INSTALLATION_LOST,
+    DISTINGUISHED_ISSUER_ID,
+    DOMINANCE_SET_MISMATCH,
+    DOMINANCE_TUPLES,
+    INSTALLED,
+    INVALID_ACTOR_CONTEXT,
+    INVALID_BOOTSTRAP_STATE,
+    PlatformKernel,
+)
+
+INSTALLER = "platform.installer"
+
+_BOOTSTRAP_TABLES = (
+    "principal_equivalence_classes",
+    "principals",
+    "authoritative_issuers",
+    "authority_dominance",
+    "platform_bootstrap_seed",
+    "platform_bootstrap_grants",
+    "platform_active_invariant",
+    "install_state",
+)
+
+
+def _count(kernel: PlatformKernel, table: str) -> int:
+    return kernel._conn.execute(f"SELECT COUNT(*) FROM {table}").fetchone()[0]
+
+
+def _count_where(kernel: PlatformKernel, table: str, where: str) -> int:
+    return kernel._conn.execute(f"SELECT COUNT(*) FROM {table} WHERE {where}").fetchone()[0]
+
+
+def _all_bootstrap_empty(kernel: PlatformKernel) -> bool:
+    return all(_count(kernel, t) == 0 for t in _BOOTSTRAP_TABLES)
+
+
+class Arch01MemoryTest(unittest.TestCase):
+    """Single-connection behavior on an in-memory database."""
+
+    def setUp(self) -> None:
+        self.kernel = PlatformKernel(":memory:")
+
+    def tearDown(self) -> None:
+        self.kernel.close()
+
+    # -- AC1 -------------------------------------------------------------- #
+    def test_install_clean(self) -> None:  # t_install_clean(+)
+        res = self.kernel.install_platform(INSTALLER)
+        self.assertEqual(res.code, INSTALLED)
+        self.assertTrue(self.kernel.is_installed())
+        self.assertEqual(_count(self.kernel, "install_state"), 1)
+        self.assertEqual(self.kernel.active_grant_count(), 1)
+        self.assertIn(ap.EVT_PLATFORM_INSTALLED, self.kernel.audit_events())
+        rows = set(
+            self.kernel._conn.execute(
+                "SELECT dominant, subordinate FROM authority_dominance"
+            ).fetchall()
+        )
+        self.assertEqual(rows, set(DOMINANCE_TUPLES))
+        issuer_ref = self.kernel._conn.execute(
+            "SELECT i.issuer_ref FROM principals p JOIN authoritative_issuers i "
+            "ON p.issuer_id = i.issuer_id WHERE p.principal_id = ?",
+            (INSTALLER,),
+        ).fetchone()
+        self.assertEqual(issuer_ref[0], DISTINGUISHED_ISSUER_ID)
+
+    # -- AC2 -------------------------------------------------------------- #
+    def test_install_twice(self) -> None:  # t_install_twice(-)
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        res2 = self.kernel.install_platform(INSTALLER)
+        self.assertEqual(res2.code, ALREADY_INSTALLED)
+        self.assertEqual(_count(self.kernel, "principals"), 1)
+        self.assertEqual(_count(self.kernel, "platform_bootstrap_grants"), 1)
+        self.assertEqual(_count(self.kernel, "install_state"), 1)
+
+    # -- AC3 / AC5 -------------------------------------------------------- #
+    def test_install_stage_rollback(self) -> None:  # t_install_stage_rollback
+        for stop in range(1, 9):
+            with self.subTest(stages=stop):
+                k = PlatformKernel(":memory:")
+                try:
+                    self._partial_bootstrap_then_rollback(k, stop)
+                    self.assertTrue(
+                        _all_bootstrap_empty(k),
+                        f"partial rows survived rollback at stage {stop}",
+                    )
+                    self.assertFalse(k.is_installed())
+                finally:
+                    k.close()
+
+    def test_no_partial_after_rollback(self) -> None:  # t_no_partial_after_rollback
+        k = PlatformKernel(":memory:")
+        try:
+            code = self._seed_bootstrap_and_mark(k, dominance=DOMINANCE_TUPLES[:-1])
+            self.assertEqual(code, DOMINANCE_SET_MISMATCH)
+            self.assertTrue(_all_bootstrap_empty(k))
+            self.assertFalse(k.is_installed())
+        finally:
+            k.close()
+
+    # -- AC4 -------------------------------------------------------------- #
+    def test_dominance_missing(self) -> None:  # t_dominance_missing(-)
+        k = PlatformKernel(":memory:")
+        try:
+            self.assertEqual(
+                self._seed_bootstrap_and_mark(k, dominance=DOMINANCE_TUPLES[:-1]),
+                DOMINANCE_SET_MISMATCH,
+            )
+            self.assertFalse(k.is_installed())
+        finally:
+            k.close()
+
+    def test_dominance_extra(self) -> None:  # t_dominance_extra(-)
+        k = PlatformKernel(":memory:")
+        try:
+            extra = DOMINANCE_TUPLES + (("platform.bootstrap", "rogue.extra"),)
+            self.assertEqual(
+                self._seed_bootstrap_and_mark(k, dominance=extra),
+                DOMINANCE_SET_MISMATCH,
+            )
+            self.assertFalse(k.is_installed())
+        finally:
+            k.close()
+
+    def test_dominance_malformed(self) -> None:  # t_dominance_malformed(-)
+        k = PlatformKernel(":memory:")
+        try:
+            malformed = DOMINANCE_TUPLES[:-1] + (("supervisor.root", "WRONG.subordinate"),)
+            self.assertEqual(
+                self._seed_bootstrap_and_mark(k, dominance=malformed),
+                DOMINANCE_SET_MISMATCH,
+            )
+            self.assertFalse(k.is_installed())
+        finally:
+            k.close()
+
+    # -- AC6 -------------------------------------------------------------- #
+    def test_principal_no_class(self) -> None:  # t_principal_no_class(-)
+        with self.kernel.actor_context("op", "operator", "install"):
+            with self.assertRaises(sqlite3.IntegrityError):
+                self.kernel._conn.execute(
+                    "INSERT INTO principals"
+                    "(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                    "VALUES ('x', 'operator', NULL, NULL, NULL, '2026-01-01T00:00:00Z')"
+                )
+
+    # -- AC7 -------------------------------------------------------------- #
+    def test_noninstaller_null_issuer(self) -> None:  # t_nonobstaller_null_issuer(-)
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        with self.kernel.actor_context("op", "operator", "normal"):
+            cur = self.kernel._conn.execute(
+                "INSERT INTO principal_equivalence_classes(created_at) VALUES ('2026-01-01T00:00:00Z')"
+            )
+            class_id = cur.lastrowid
+            with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                self.kernel._conn.execute(
+                    "INSERT INTO principals"
+                    "(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                    "VALUES ('rogue', 'operator', ?, NULL, NULL, '2026-01-01T00:00:00Z')",
+                    (class_id,),
+                )
+            self.assertIn("INVALID_BOOTSTRAP_STATE", str(ctx.exception))
+
+    def test_installer_null_issuer_only_during_install(self) -> None:
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        with self.kernel.actor_context("i2", "installer", "install"):
+            cur = self.kernel._conn.execute(
+                "INSERT INTO principal_equivalence_classes(created_at) VALUES ('2026-01-01T00:00:00Z')"
+            )
+            class_id = cur.lastrowid
+            with self.assertRaises(sqlite3.IntegrityError):
+                self.kernel._conn.execute(
+                    "INSERT INTO principals"
+                    "(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                    "VALUES ('i2', 'installer', ?, NULL, NULL, '2026-01-01T00:00:00Z')",
+                    (class_id,),
+                )
+
+    # -- AC8 -------------------------------------------------------------- #
+    def test_context_missing(self) -> None:  # t_context_missing(-)
+        self.assertIsNone(self.kernel._ctx)
+        with self.assertRaises(sqlite3.IntegrityError) as ctx:
+            self.kernel._conn.execute(
+                "INSERT INTO principal_equivalence_classes(created_at) VALUES ('2026-01-01T00:00:00Z')"
+            )
+        self.assertIn("INVALID_ACTOR_CONTEXT", str(ctx.exception))
+
+    def test_context_stale(self) -> None:  # t_context_stale(-)
+        with self.kernel.actor_context("op", "operator", "normal"):
+            self.kernel._ctx.expired = True
+            with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                self.kernel._conn.execute(
+                    "INSERT INTO principal_equivalence_classes(created_at) VALUES ('2026-01-01T00:00:00Z')"
+                )
+            self.assertIn("INVALID_ACTOR_CONTEXT", str(ctx.exception))
+
+    def test_context_epoch_shift(self) -> None:  # t_context_epoch_shift(-)
+        with self.kernel.actor_context("op", "operator", "normal"):
+            self.kernel._ctx.live_epoch = self.kernel._ctx.bound_epoch + 99
+            with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                self.kernel._conn.execute(
+                    "INSERT INTO principal_equivalence_classes(created_at) VALUES ('2026-01-01T00:00:00Z')"
+                )
+            self.assertIn("INVALID_ACTOR_CONTEXT", str(ctx.exception))
+
+    def test_bad_actor_kind_or_mode_rejected(self) -> None:
+        for kind, mode in (("intruder", "normal"), ("operator", "sabotage")):
+            with self.subTest(kind=kind, mode=mode):
+                with self.kernel.actor_context("op", kind, mode):
+                    with self.assertRaises(sqlite3.IntegrityError):
+                        self.kernel._conn.execute(
+                            "INSERT INTO principal_equivalence_classes(created_at) "
+                            "VALUES ('2026-01-01T00:00:00Z')"
+                        )
+
+    # -- AC9 -------------------------------------------------------------- #
+    def test_bootstrap_immutable_update(self) -> None:  # t_bootstrap_immutable_{update}
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        cases = [
+            ("UPDATE install_state SET installed_at = 'x' WHERE id = 1", "IMMUTABLE_INSTALL_STATE"),
+            ("UPDATE platform_bootstrap_seed SET created_at = 'x' WHERE seed_id = 1", "IMMUTABLE_SEED"),
+            ("UPDATE authority_dominance SET subordinate = 'x' WHERE dominant = 'supervisor.root'", "IMMUTABLE_DOMINANCE"),
+            (f"UPDATE authoritative_issuers SET issuer_ref = 'x' WHERE issuer_ref = '{DISTINGUISHED_ISSUER_ID}'", "IMMUTABLE_ISSUER"),
+            (f"UPDATE principals SET actor_kind = 'operator' WHERE principal_id = '{INSTALLER}'", "IMMUTABLE_PRINCIPAL"),
+        ]
+        for sql, tag in cases:
+            with self.subTest(sql=sql):
+                with self.kernel.actor_context("op", "operator", "normal"):
+                    with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                        self.kernel._conn.execute(sql)
+                    self.assertIn(tag, str(ctx.exception))
+
+    def test_bootstrap_immutable_delete(self) -> None:  # t_bootstrap_immutable_{delete}
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        cases = [
+            ("DELETE FROM install_state WHERE id = 1", "IMMUTABLE_INSTALL_STATE"),
+            ("DELETE FROM platform_bootstrap_seed WHERE seed_id = 1", "IMMUTABLE_SEED"),
+            ("DELETE FROM authority_dominance", "IMMUTABLE_DOMINANCE"),
+            ("DELETE FROM authoritative_issuers", "IMMUTABLE_ISSUER"),
+            (f"DELETE FROM principals WHERE principal_id = '{INSTALLER}'", "IMMUTABLE_PRINCIPAL"),
+            ("DELETE FROM platform_bootstrap_grants", "IMMUTABLE_GRANT"),
+        ]
+        for sql, tag in cases:
+            with self.subTest(sql=sql):
+                with self.kernel.actor_context("op", "operator", "normal"):
+                    with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                        self.kernel._conn.execute(sql)
+                    self.assertIn(tag, str(ctx.exception))
+
+    def test_grant_reactivation_rejected(self) -> None:
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        self.kernel.register_principal(
+            "op1", "operator", DISTINGUISHED_ISSUER_ID, actor_principal=INSTALLER
+        )
+        self.assertEqual(
+            self.kernel.grant_platform_bootstrap("op1", INSTALLER).code, INSTALLED
+        )
+        gid = self.kernel._conn.execute(
+            "SELECT grant_id FROM platform_bootstrap_grants WHERE grantee_principal_id = 'op1'"
+        ).fetchone()[0]
+        self.assertEqual(
+            self.kernel.revoke_platform_bootstrap(gid, actor_principal=INSTALLER).code,
+            INSTALLED,
+        )
+        with self.kernel.actor_context("op", "operator", "normal"):
+            with self.assertRaises(sqlite3.IntegrityError) as ctx:
+                self.kernel._conn.execute(
+                    "UPDATE platform_bootstrap_grants SET active = 1 WHERE grant_id = ?",
+                    (gid,),
+                )
+            self.assertIn("IMMUTABLE_GRANT", str(ctx.exception))
+
+    # -- AC12 ------------------------------------------------------------- #
+    def test_raw_write_bypass(self) -> None:  # t_raw_write_bypass(raw-bypass)
+        with tempfile.TemporaryDirectory() as tmp:
+            path = os.path.join(tmp, "p.sqlite3")
+            k = PlatformKernel(path)
+            self.assertEqual(k.install_platform(INSTALLER).code, INSTALLED)
+            k.close()
+            raw = sqlite3.connect(path)
+            raw.execute("PRAGMA foreign_keys = ON")
+            try:
+                with self.assertRaises(sqlite3.Error):
+                    raw.execute(
+                        "INSERT INTO audit_records(event, created_at) "
+                        "VALUES ('forged', '2026-01-01T00:00:00Z')"
+                    )
+                    raw.commit()
+                with self.assertRaises(sqlite3.Error):
+                    raw.execute("UPDATE install_state SET installed_at = 'x' WHERE id = 1")
+                    raw.commit()
+                with self.assertRaises(sqlite3.Error):
+                    raw.execute("DELETE FROM platform_bootstrap_grants")
+                    raw.commit()
+            finally:
+                raw.close()
+
+    # -- AC13 ------------------------------------------------------------- #
+    def test_audit_created(self) -> None:  # t_audit_created(+)
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        self.kernel.register_principal(
+            "op1", "operator", DISTINGUISHED_ISSUER_ID, actor_principal=INSTALLER
+        )
+        self.assertEqual(
+            self.kernel.grant_platform_bootstrap("op1", INSTALLER).code, INSTALLED
+        )
+        gid = self.kernel._conn.execute(
+            "SELECT grant_id FROM platform_bootstrap_grants WHERE grantee_principal_id = 'op1'"
+        ).fetchone()[0]
+        self.assertEqual(
+            self.kernel.revoke_platform_bootstrap(gid, actor_principal=INSTALLER).code,
+            INSTALLED,
+        )
+        events = self.kernel.audit_events()
+        for evt in (
+            ap.EVT_PLATFORM_INSTALLED,
+            ap.EVT_GRANT_CREATED,
+            ap.EVT_GRANT_REVOKED,
+            ap.EVT_PRINCIPAL_REGISTERED,
+        ):
+            self.assertIn(evt, events)
+
+    # -- AC14 ------------------------------------------------------------- #
+    def test_audit_immutable(self) -> None:  # t_audit_immutable(raw-bypass)
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        with self.kernel.actor_context("op", "operator", "normal"):
+            with self.assertRaises(sqlite3.IntegrityError) as up:
+                self.kernel._conn.execute("UPDATE audit_records SET event = 'x' WHERE audit_id = 1")
+            self.assertIn("IMMUTABLE_AUDIT", str(up.exception))
+            with self.assertRaises(sqlite3.IntegrityError) as dl:
+                self.kernel._conn.execute("DELETE FROM audit_records WHERE audit_id = 1")
+            self.assertIn("IMMUTABLE_AUDIT", str(dl.exception))
+
+    # -- meta ------------------------------------------------------------- #
+    def test_schema_meta(self) -> None:
+        rows = dict(self.kernel._conn.execute("SELECT key, value FROM arch01_meta").fetchall())
+        self.assertEqual(rows["schema_version"], str(ap.SCHEMA_VERSION))
+        self.assertIn("disabled by default", rows["architecture"])
+
+    def test_register_principal_creates_class_first(self) -> None:
+        self.assertEqual(self.kernel.install_platform(INSTALLER).code, INSTALLED)
+        res = self.kernel.register_principal(
+            "svc1", "service", DISTINGUISHED_ISSUER_ID, actor_principal=INSTALLER
+        )
+        self.assertEqual(res.code, INSTALLED)
+        row = self.kernel._conn.execute(
+            "SELECT current_class_id FROM principals WHERE principal_id = 'svc1'"
+        ).fetchone()
+        self.assertIsNotNone(row[0])
+
+    # -- helpers ---------------------------------------------------------- #
+    def _partial_bootstrap_then_rollback(self, k: PlatformKernel, stop: int) -> None:
+        """Execute the first ``stop`` bootstrap statements, then ROLLBACK."""
+        now = "2026-01-01T00:00:00Z"
+        k._conn.execute("BEGIN IMMEDIATE")
+        class_id = None
+        issuer_id = None
+        try:
+            with k.actor_context(INSTALLER, "installer", "install"):
+                c = k._conn
+                if stop >= 1:
+                    class_id = c.execute(
+                        "INSERT INTO principal_equivalence_classes(created_at) VALUES (?)", (now,)
+                    ).lastrowid
+                if stop >= 2:
+                    c.execute(
+                        "INSERT INTO principals(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                        "VALUES (?, 'installer', ?, NULL, ?, ?)",
+                        (INSTALLER, class_id, INSTALLER, now),
+                    )
+                if stop >= 3:
+                    issuer_id = c.execute(
+                        "INSERT INTO authoritative_issuers(issuer_kind, issuer_ref, created_at) VALUES ('operator-key', ?, ?)",
+                        (DISTINGUISHED_ISSUER_ID, now),
+                    ).lastrowid
+                if stop >= 4:
+                    c.execute(
+                        "UPDATE principals SET issuer_id = ? WHERE principal_id = ?",
+                        (issuer_id, INSTALLER),
+                    )
+                if stop >= 5:
+                    c.executemany(
+                        "INSERT INTO authority_dominance(dominant, subordinate) VALUES (?, ?)",
+                        DOMINANCE_TUPLES,
+                    )
+                if stop >= 6:
+                    c.execute(
+                        "INSERT INTO platform_bootstrap_seed(seed_id, installer_principal_id, created_at) VALUES (1, ?, ?)",
+                        (INSTALLER, now),
+                    )
+                if stop >= 7:
+                    c.execute(
+                        "INSERT INTO platform_bootstrap_grants(grantee_principal_id, granted_by, active, created_at) VALUES (?, NULL, 1, ?)",
+                        (INSTALLER, now),
+                    )
+                if stop >= 8:
+                    c.execute("INSERT INTO platform_active_invariant(id, active_count) VALUES (1, 1)")
+        finally:
+            k._conn.execute("ROLLBACK")
+
+    def _seed_bootstrap_and_mark(self, k: PlatformKernel, dominance) -> str:
+        """Seed a full bootstrap with a caller-supplied dominance set, then
+        attempt the marker insert. Returns the classified failure code (or
+        INSTALLED). Rolls back on failure so no partial rows remain."""
+        now = "2026-01-01T00:00:00Z"
+        k._conn.execute("BEGIN IMMEDIATE")
+        try:
+            with k.actor_context(INSTALLER, "installer", "install"):
+                c = k._conn
+                class_id = c.execute(
+                    "INSERT INTO principal_equivalence_classes(created_at) VALUES (?)", (now,)
+                ).lastrowid
+                c.execute(
+                    "INSERT INTO principals(principal_id, actor_kind, current_class_id, issuer_id, registered_by, created_at) "
+                    "VALUES (?, 'installer', ?, NULL, ?, ?)",
+                    (INSTALLER, class_id, INSTALLER, now),
+                )
+                issuer_id = c.execute(
+                    "INSERT INTO authoritative_issuers(issuer_kind, issuer_ref, created_at) VALUES ('operator-key', ?, ?)",
+                    (DISTINGUISHED_ISSUER_ID, now),
+                ).lastrowid
+                c.execute(
+                    "UPDATE principals SET issuer_id = ? WHERE principal_id = ?",
+                    (issuer_id, INSTALLER),
+                )
+                c.executemany(
+                    "INSERT INTO authority_dominance(dominant, subordinate) VALUES (?, ?)",
+                    dominance,
+                )
+                c.execute(
+                    "INSERT INTO platform_bootstrap_seed(seed_id, installer_principal_id, created_at) VALUES (1, ?, ?)",
+                    (INSTALLER, now),
+                )
+                c.execute(
+                    "INSERT INTO platform_bootstrap_grants(grantee_principal_id, granted_by, active, created_at) VALUES (?, NULL, 1, ?)",
+                    (INSTALLER, now),
+                )
+                c.execute("INSERT INTO platform_active_invariant(id, active_count) VALUES (1, 1)")
+                c.execute(
+                    "INSERT INTO install_state(id, marker, installed_at) VALUES (1, 'installed', ?)",
+                    (now,),
+                )
+            k._conn.execute("COMMIT")
+            return INSTALLED
+        except sqlite3.Error as exc:
+            k._safe_rollback()
+            return PlatformKernel._classify(exc)
+
+
+class Arch01ConcurrencyTest(unittest.TestCase):
+    """Concurrency invariants require file-backed DBs and independent connections."""
+
+    def setUp(self) -> None:
+        self._tmp = tempfile.TemporaryDirectory()
+        self.path = os.path.join(self._tmp.name, "p.sqlite3")
+
+    def tearDown(self) -> None:
+        self._tmp.cleanup()
+
+    # -- AC10 ------------------------------------------------------------- #
+    def test_concurrent_install(self) -> None:  # t_concurrent_install(concurrency)
+        k1 = PlatformKernel(self.path, busy_timeout_ms=0)
+        k2 = PlatformKernel(self.path, busy_timeout_ms=0)
+        barrier = threading.Barrier(2)
+        results = {}
+
+        def _install(name, kernel):
+            barrier.wait()
+            results[name] = kernel.install_platform(INSTALLER).code
+
+        try:
+            with ThreadPoolExecutor(max_workers=2) as ex:
+                f1 = ex.submit(_install, "a", k1)
+                f2 = ex.submit(_install, "b", k2)
+                f1.result()
+                f2.result()
+            codes = sorted(results.values())
+            self.assertEqual(codes.count(INSTALLED), 1, f"exactly one install expected: {results}")
+            other = [c for c in results.values() if c != INSTALLED][0]
+            self.assertIn(other, (ALREADY_INSTALLED, CONCURRENT_INSTALLATION_LOST))
+            self.assertTrue(k1.is_installed())
+            self.assertEqual(_count(k1, "install_state"), 1)
+            self.assertEqual(_count(k1, "principals"), 1)
+        finally:
+            k1.close()
+            k2.close()
+
+    # -- AC11 ------------------------------------------------------------- #
+    def test_concurrent_last_grant_revoke(self) -> None:  # t_concurrent_last_grant_revoke
+        setup = PlatformKernel(self.path)
+        self.assertEqual(setup.install_platform(INSTALLER).code, INSTALLED)
+        setup.register_principal("op1", "operator", DISTINGUISHED_ISSUER_ID, actor_principal=INSTALLER)
+        self.assertEqual(setup.grant_platform_bootstrap("op1", INSTALLER).code, INSTALLED)
+        self.assertEqual(setup.active_grant_count(), 2)
+        gids = [
+            r[0]
+            for r in setup._conn.execute(
+                "SELECT grant_id FROM platform_bootstrap_grants WHERE active = 1 ORDER BY grant_id"
+            ).fetchall()
+        ]
+        setup.close()
+        self.assertEqual(len(gids), 2)
+
+        k1 = PlatformKernel(self.path, busy_timeout_ms=3000)
+        k2 = PlatformKernel(self.path, busy_timeout_ms=3000)
+        barrier = threading.Barrier(2)
+        results = {}
+
+        def _revoke(name, kernel, gid):
+            barrier.wait()
+            results[name] = kernel.revoke_platform_bootstrap(gid, actor_principal=INSTALLER).code
+
+        try:
+            with ThreadPoolExecutor(max_workers=2) as ex:
+                f1 = ex.submit(_revoke, "a", k1, gids[0])
+                f2 = ex.submit(_revoke, "b", k2, gids[1])
+                f1.result()
+                f2.result()
+            codes = list(results.values())
+            self.assertEqual(codes.count(INSTALLED), 1, f"exactly one revoke should win: {results}")
+            self.assertEqual(codes.count(AUTHORIZATION_DENIED), 1, f"one revoke must be denied: {results}")
+            self.assertEqual(k1.active_grant_count(), 1)
+            self.assertEqual(_count_where(k1, "platform_bootstrap_grants", "active = 1"), 1)
+        finally:
+            k1.close()
+            k2.close()
+
+    def test_revoke_final_grant_denied(self) -> None:
+        k = PlatformKernel(self.path)
+        try:
+            self.assertEqual(k.install_platform(INSTALLER).code, INSTALLED)
+            gid = k._conn.execute(
+                "SELECT grant_id FROM platform_bootstrap_grants WHERE active = 1"
+            ).fetchone()[0]
+            res = k.revoke_platform_bootstrap(gid, actor_principal=INSTALLER)
+            self.assertEqual(res.code, AUTHORIZATION_DENIED)
+            self.assertEqual(k.active_grant_count(), 1)
+            self.assertEqual(_count_where(k, "platform_bootstrap_grants", "active = 1"), 1)
+        finally:
+            k.close()
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_issue_812_publish_unpublished_commit.py

@@ -0,0 +1,650 @@
+"""Publication of an unpublished local commit (#812 AC20).
+
+Entry point B of #812: a registered worktree, clean, on its issue branch,
+holding a local commit that has never been published. Exact-owner lease renewal
+refuses such a claim for want of an observable remote head, and every existing
+publication path is lock-derived, so the two predicates close a cycle around
+work that is otherwise complete.
+
+These tests exercise the disposition through its *evidence*, never through any
+particular issue number: every case uses an arbitrary issue number against a
+synthetic repository, and the same assertions hold for any other. Nothing here
+reads, writes, or references the live protected worktree named in #812 AC17 —
+that content is preserved evidence for the duration of this work, so the
+fixtures below build their own repositories from scratch.
+
+The remote is a local bare repository, so publication and read-after-write
+verification are genuinely executed rather than mocked.
+"""
+
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+import tempfile
+import unittest
+from datetime import datetime, timedelta, timezone
+from unittest.mock import patch
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+import branch_publish  # noqa: E402
+import issue_lock_provenance  # noqa: E402
+import issue_lock_renewal  # noqa: E402
+import issue_lock_store  # noqa: E402
+import mcp_server  # noqa: E402
+from mutation_profile_fixture import shared_mutation_env  # noqa: E402
+
+ISSUE = 9812
+BRANCH = f"feat/issue-{ISSUE}-publish-fixture"
+IDENTITY = "example-user"
+PROFILE = "test-author-prgs"
+ORG = "Scaled-Tech-Consulting"
+REPO = "Gitea-Tools"
+GIT_REMOTE = "prgs"
+
+
+def _ts(hours: int) -> str:
+    return (
+        (datetime.now(timezone.utc) + timedelta(hours=hours))
+        .isoformat()
+        .replace("+00:00", "Z")
+    )
+
+
+class _PublishBase(unittest.TestCase):
+    """Real git repo + real bare remote + durable lock naming the caller.
+
+    The recorded owner pid is deliberately **this live process**. That mirrors
+    the production shape #812 documents, where the pid belongs to a long-running
+    MCP daemon rather than to a dead author client, and it proves publication
+    never depends on a dead process (#812 AC24).
+    """
+
+    def setUp(self):
+        self.lock_dir = tempfile.TemporaryDirectory()
+        self.addCleanup(self.lock_dir.cleanup)
+        self.origin = tempfile.mkdtemp(prefix="issue812-origin-")
+        self.repo = tempfile.mkdtemp(prefix="issue812-work-")
+        for path in (self.origin, self.repo):
+            self.addCleanup(
+                lambda p=path: subprocess.run(["rm", "-rf", p], check=False)
+            )
+        self._init_repos()
+        self.remotes = patch.dict(
+            mcp_server.REMOTES,
+            {"prgs": {"host": "gitea.prgs.cc", "org": ORG, "repo": REPO}},
+        )
+        self.remotes.start()
+        self.addCleanup(patch.stopall)
+        mcp_server._IDENTITY_CACHE.clear()
+
+    # ── fixture construction ─────────────────────────────────────────────
+    def _git(self, *args, cwd=None):
+        return subprocess.run(
+            ["git", "-C", cwd or self.repo, *args],
+            capture_output=True,
+            text=True,
+            check=True,
+        )
+
+    def _init_repos(self):
+        subprocess.run(
+            ["git", "init", "-q", "--bare", "-b", "master", self.origin], check=True
+        )
+        self._git("init", "-q", "-b", "master")
+        self._git("config", "user.email", "[email protected]")
+        self._git("config", "user.name", "Test")
+        self._git("remote", "add", GIT_REMOTE, self.origin)
+
+        with open(os.path.join(self.repo, "seed.txt"), "w") as fh:
+            fh.write("seed\n")
+        self._git("add", "seed.txt")
+        self._git("commit", "-q", "-m", "seed")
+        self.base_sha = self._git("rev-parse", "HEAD").stdout.strip()
+        self._git("push", "-q", GIT_REMOTE, "master")
+
+        self._git("checkout", "-q", "-b", BRANCH)
+        with open(os.path.join(self.repo, "work.txt"), "w") as fh:
+            fh.write("unpublished implementation\n")
+        self._git("add", "work.txt")
+        self._git("commit", "-q", "-m", "unpublished implementation")
+        self.head_sha = self._git("rev-parse", "HEAD").stdout.strip()
+        self.worktree = os.path.realpath(self.repo)
+
+    def lock_path(self):
+        return issue_lock_store.lock_file_path(
+            remote="prgs", org=ORG, repo=REPO, issue_number=ISSUE,
+            lock_dir=self.lock_dir.name,
+        )
+
+    def write_lock(self, **overrides):
+        path = self.lock_path()
+        claimant = overrides.pop(
+            "claimant", {"username": IDENTITY, "profile": PROFILE}
+        )
+        pid = overrides.pop("session_pid", os.getpid())
+        lease = {
+            "operation_type": issue_lock_store.AUTHOR_ISSUE_WORK_LEASE,
+            "issue_number": ISSUE,
+            "pr_number": None,
+            "branch": overrides.get("branch_name", BRANCH),
+            "worktree_path": overrides.get("worktree_path", self.worktree),
+            "claimant": claimant,
+            "created_at": _ts(-2),
+            "last_heartbeat_at": _ts(-2),
+            # Expired: entry point B's lease has lapsed, which is precisely why
+            # renewal — and therefore a published head — is needed.
+            "expires_at": _ts(-1),
+        }
+        lease.update(overrides.pop("work_lease", {}))
+        data = {
+            "issue_number": ISSUE,
+            "branch_name": BRANCH,
+            "remote": "prgs",
+            "org": ORG,
+            "repo": REPO,
+            "worktree_path": self.worktree,
+            "session_pid": pid,
+            "pid": pid,
+            "lock_generation": 1,
+            "work_lease": lease,
+            "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+                tool="gitea_lock_issue", claimant=claimant
+            ),
+        }
+        data.update(overrides)
+        data["lock_file_path"] = path
+        issue_lock_store.save_lock_file(path, data)
+        return path
+
+    def _tool_env(self):
+        env = shared_mutation_env(
+            PROFILE, include_example_repo=True,
+            GITEA_ISSUE_LOCK_DIR=self.lock_dir.name,
+        )
+        env["GITEA_ISSUE_LOCK_DIR"] = self.lock_dir.name
+        # These tests repoint PROJECT_ROOT at a synthetic repository so the
+        # registered-worktree proof runs for real. Pin the parity gate to the
+        # server's own startup head so that repointing does not read as a stale
+        # daemon; the gate itself stays live and enforced.
+        startup_head = mcp_server._STARTUP_PARITY.get("startup_head") or ""
+        env["GITEA_TEST_CURRENT_HEAD"] = startup_head
+        env["GITEA_TEST_LIVE_REMOTE_HEAD"] = startup_head
+        return env
+
+    # ── tool driver ──────────────────────────────────────────────────────
+    def run_publish(self, *, open_prs=None, expected_head=None, **kwargs):
+        """Drive the public publication tool against the synthetic fixture."""
+        env = self._tool_env()
+        with patch(
+            "mcp_server._list_open_pulls", return_value=list(open_prs or [])
+        ), patch(
+            "mcp_server._auth", return_value="token x"
+        ), patch(
+            "mcp_server.get_auth_header", return_value="token x"
+        ), patch(
+            "mcp_server._work_lease_claimant",
+            return_value={"username": IDENTITY, "profile": PROFILE},
+        ), patch.object(
+            mcp_server, "PROJECT_ROOT", self.repo
+        ), patch.dict(os.environ, env, clear=True):
+            os.environ["GITEA_ISSUE_LOCK_DIR"] = self.lock_dir.name
+            return mcp_server.gitea_publish_unpublished_issue_branch(
+                issue_number=kwargs.pop("issue_number", ISSUE),
+                branch_name=kwargs.pop("branch_name", BRANCH),
+                worktree_path=kwargs.pop("worktree_path", self.worktree),
+                expected_head=expected_head or self.head_sha,
+                remote="prgs",
+                git_remote_name=kwargs.pop("git_remote_name", GIT_REMOTE),
+                **kwargs,
+            )
+
+    def remote_head(self, branch=BRANCH):
+        res = subprocess.run(
+            ["git", "-C", self.origin, "rev-parse", "--verify", "--quiet", branch],
+            capture_output=True, text=True, check=False,
+        )
+        return (res.stdout or "").strip() or None
+
+
+class TestSuccessfulPublication(_PublishBase):
+    """AC20 — the branch becomes observable and is verified after the write."""
+
+    def test_publishes_clean_unpublished_commit(self):
+        self.write_lock()
+        self.assertIsNone(self.remote_head(), "fixture must start unpublished")
+
+        result = self.run_publish()
+
+        self.assertTrue(result["success"], result.get("reasons"))
+        self.assertTrue(result["performed"])
+        self.assertTrue(result["published"])
+        self.assertTrue(result["verified"], "read-after-write must be proven")
+        self.assertEqual(result["remote_head_sha"], self.head_sha)
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+    def test_publication_does_not_rewrite_the_commit(self):
+        self.write_lock()
+        self.run_publish()
+        # The published object is the same commit, not a copy or a rewrite.
+        self.assertEqual(self.remote_head(), self.head_sha)
+        self.assertEqual(
+            self._git("rev-parse", "HEAD").stdout.strip(), self.head_sha
+        )
+
+    def test_exact_next_action_names_the_lock_call(self):
+        self.write_lock()
+        result = self.run_publish()
+        self.assertIn("gitea_lock_issue", result["exact_next_action"])
+
+
+class TestFailsClosed(_PublishBase):
+    """AC20/AC9 — each refusal reason, exercised independently."""
+
+    def test_changed_local_head_refuses(self):
+        self.write_lock()
+        stale = self.base_sha  # a real commit, but not the declared head
+        result = self.run_publish(expected_head=stale)
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("local commit changed" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+        self.assertIsNone(self.remote_head(), "refusal must not publish")
+
+    def test_abbreviated_sha_refuses(self):
+        self.write_lock()
+        result = self.run_publish(expected_head=self.head_sha[:8])
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("40-character" in r for r in result["reasons"]), result["reasons"]
+        )
+
+    def test_dirty_tracked_worktree_refuses(self):
+        self.write_lock()
+        with open(os.path.join(self.repo, "work.txt"), "a") as fh:
+            fh.write("uncommitted edit\n")
+
+        result = self.run_publish()
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("dirty tracked files" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+        self.assertIn("work.txt", result["evidence"]["dirty_tracked_files"])
+        self.assertIsNone(self.remote_head())
+
+    def test_untracked_file_refuses(self):
+        self.write_lock()
+        with open(os.path.join(self.repo, "stray.txt"), "w") as fh:
+            fh.write("not committed\n")
+
+        result = self.run_publish()
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("untracked files" in r for r in result["reasons"]), result["reasons"]
+        )
+        self.assertIn("stray.txt", result["evidence"]["untracked_files"])
+        self.assertIsNone(self.remote_head())
+
+    def test_unexpected_remote_head_refuses(self):
+        """A remote head that is not an ancestor must never be overwritten."""
+        self.write_lock()
+        # Publish a divergent commit to the branch from a separate line.
+        self._git("checkout", "-q", "-b", "divergent", self.base_sha)
+        with open(os.path.join(self.repo, "other.txt"), "w") as fh:
+            fh.write("someone else's work\n")
+        self._git("add", "other.txt")
+        self._git("commit", "-q", "-m", "divergent")
+        divergent = self._git("rev-parse", "HEAD").stdout.strip()
+        self._git("push", "-q", GIT_REMOTE, f"{divergent}:refs/heads/{BRANCH}")
+        self._git("checkout", "-q", BRANCH)
+
+        result = self.run_publish()
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("not an ancestor" in r for r in result["reasons"]), result["reasons"]
+        )
+        self.assertEqual(
+            self.remote_head(), divergent, "the other head must survive intact"
+        )
+
+    def test_fast_forward_remote_head_is_allowed(self):
+        """An ancestor head is an honest fast-forward, not a conflict."""
+        self.write_lock()
+        self._git("push", "-q", GIT_REMOTE, f"{self.base_sha}:refs/heads/{BRANCH}")
+
+        result = self.run_publish()
+
+        self.assertTrue(result["success"], result.get("reasons"))
+        self.assertTrue(result["evidence"]["fast_forward_from_remote"])
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+    def test_content_hash_mismatch_refuses(self):
+        self.write_lock()
+        wrong = {"work.txt": "0" * 64}
+
+        result = self.run_publish(expected_file_hashes=wrong)
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("declared content hashes" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+        self.assertFalse(result["evidence"]["file_hashes_verified"])
+        self.assertIsNone(self.remote_head())
+
+    def test_matching_content_hashes_publish(self):
+        self.write_lock()
+        digests = branch_publish.hash_worktree_files(self.worktree, ["work.txt"])
+
+        result = self.run_publish(expected_file_hashes=digests)
+
+        self.assertTrue(result["success"], result.get("reasons"))
+        self.assertTrue(result["evidence"]["file_hashes_verified"])
+
+    def test_missing_declared_file_refuses(self):
+        self.write_lock()
+        result = self.run_publish(expected_file_hashes={"absent.txt": "0" * 64})
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("missing or unreadable" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+
+    def test_foreign_claimant_refuses(self):
+        """Ownership comes from the durable record, not from the caller."""
+        self.write_lock(claimant={"username": "someone-else", "profile": PROFILE})
+
+        result = self.run_publish()
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("foreign claim" in r for r in result["reasons"]), result["reasons"]
+        )
+        self.assertIsNone(self.remote_head())
+
+    def test_foreign_profile_refuses(self):
+        self.write_lock(
+            claimant={"username": IDENTITY, "profile": "test-reviewer-prgs"}
+        )
+        result = self.run_publish()
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("claimant profile" in r for r in result["reasons"]), result["reasons"]
+        )
+
+    def test_absent_lock_record_refuses(self):
+        """No recorded claim means this cannot be used to bypass the lock."""
+        result = self.run_publish()  # no write_lock()
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("no durable issue-lock record" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+        self.assertIsNone(self.remote_head())
+
+    def test_branch_mismatch_against_lock_refuses(self):
+        self.write_lock(branch_name=f"feat/issue-{ISSUE}-different")
+        result = self.run_publish()
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("records branch" in r for r in result["reasons"]), result["reasons"]
+        )
+
+    def test_worktree_mismatch_against_lock_refuses(self):
+        self.write_lock(worktree_path="/tmp/some/other/worktree")
+        result = self.run_publish()
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("records worktree" in r for r in result["reasons"]), result["reasons"]
+        )
+
+    def test_competing_open_pr_on_another_branch_refuses(self):
+        self.write_lock()
+        competing = [{"number": 4242, "head": {"ref": f"fix/issue-{ISSUE}-rival"}}]
+
+        result = self.run_publish(open_prs=competing)
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("already claim issue" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+        self.assertIsNone(self.remote_head())
+
+    def test_open_pr_on_the_same_branch_is_not_competing(self):
+        """This branch's own PR is not a rival claim against itself."""
+        self.write_lock()
+        own = [{"number": 77, "head": {"ref": BRANCH}}]
+
+        result = self.run_publish(open_prs=own)
+
+        self.assertTrue(result["success"], result.get("reasons"))
+
+
+class TestGuardStrictnessPreserved(_PublishBase):
+    """AC15 — publication is an operation, never a weakening of the guards."""
+
+    def test_non_issue_branch_refuses(self):
+        self._git("checkout", "-q", "-b", "scratch/not-issue-linked")
+        self.write_lock(branch_name="scratch/not-issue-linked")
+
+        result = self.run_publish(branch_name="scratch/not-issue-linked")
+
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("issue-linked" in r for r in result["reasons"]), result["reasons"]
+        )
+
+    def test_stable_branch_refuses(self):
+        self.write_lock(branch_name="master")
+        result = self.run_publish(branch_name="master")
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("issue-linked" in r or "stable branch" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+
+    def test_branch_number_must_match_the_issue(self):
+        other = "feat/issue-7777-mismatched"
+        self._git("checkout", "-q", "-b", other)
+        self.write_lock(branch_name=other)
+        result = self.run_publish(branch_name=other)
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("does not carry issue number" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+
+    def test_unregistered_worktree_refuses(self):
+        """#713 — an improvised directory is not a registered worktree."""
+        path = self.write_lock()
+        assessment = branch_publish.assess_unpublished_commit_publication(
+            issue_lock_store.read_lock_file(path),
+            issue_number=ISSUE, branch_name=BRANCH, worktree_path=self.worktree,
+            expected_head=self.head_sha, remote="prgs", org=ORG, repo=REPO,
+            identity=IDENTITY, profile=PROFILE,
+            worktree_state={
+                "current_branch": BRANCH, "porcelain_status": "",
+                "head_sha": self.head_sha,
+            },
+            worktree_registered=False,
+            remote_probe={"probe_ok": True, "remote_branch_exists": False},
+        )
+        self.assertEqual(assessment["outcome"], branch_publish.REFUSED)
+        self.assertTrue(
+            any("not listed in git worktree list" in r
+                for r in assessment["reasons"]),
+            assessment["reasons"],
+        )
+
+    def test_unobservable_remote_refuses(self):
+        """An unknown remote state must not be mistaken for an absent branch."""
+        self.write_lock()
+        result = self.run_publish(git_remote_name="no-such-remote")
+        self.assertFalse(result["success"])
+        self.assertTrue(
+            any("could not be observed" in r for r in result["reasons"]),
+            result["reasons"],
+        )
+
+
+class TestRecordSeparation(_PublishBase):
+    """AC23 — the durable issue lock and the workflow lease are distinct."""
+
+    def test_publication_leaves_the_issue_lock_byte_identical(self):
+        path = self.write_lock()
+        with open(path, "rb") as fh:
+            before = fh.read()
+
+        result = self.run_publish()
+
+        self.assertTrue(result["success"], result.get("reasons"))
+        with open(path, "rb") as fh:
+            after = fh.read()
+        self.assertEqual(before, after, "publication must not mutate the lock record")
+        self.assertFalse(result["issue_lock_record_mutated"])
+        self.assertFalse(result["workflow_lease_touched"])
+
+    def test_refusal_also_reports_untouched_records(self):
+        result = self.run_publish()  # refuses: no lock record
+        self.assertFalse(result["issue_lock_record_mutated"])
+        self.assertFalse(result["workflow_lease_touched"])
+
+    def test_lock_generation_is_not_advanced(self):
+        path = self.write_lock()
+        self.run_publish()
+        lock = issue_lock_store.read_lock_file(path)
+        self.assertEqual(lock["lock_generation"], 1)
+
+
+class TestTruthfulProcessEvidence(_PublishBase):
+    """AC24 — a live daemon pid is never represented as a dead process."""
+
+    def test_live_recorded_pid_does_not_block_publication(self):
+        # The recorded pid is this live process, standing in for the live MCP
+        # daemon. Reclaim would refuse here; publication legitimately does not.
+        path = self.write_lock(session_pid=os.getpid())
+        lock = issue_lock_store.read_lock_file(path)
+        self.assertEqual(lock["pid"], os.getpid())
+
+        result = self.run_publish()
+
+        self.assertTrue(result["success"], result.get("reasons"))
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+    def test_liveness_is_not_consulted_as_evidence(self):
+        self.write_lock(session_pid=os.getpid())
+        result = self.run_publish()
+        self.assertFalse(result["evidence"]["owner_pid_liveness_consulted"])
+
+    def test_reclaim_still_refuses_for_the_same_live_pid(self):
+        """Publication does not soften the reclaim predicate it routes around."""
+        path = self.write_lock(session_pid=os.getpid())
+        lock = issue_lock_store.read_lock_file(path)
+        reclaim = issue_lock_store.assess_expired_lock_reclaim(lock)
+        self.assertFalse(reclaim["reclaim_allowed"])
+
+
+class TestIdempotentRetry(_PublishBase):
+    """AC20 — retry is safe and read-after-write is proven every time."""
+
+    def test_second_publication_reports_already_published(self):
+        self.write_lock()
+        first = self.run_publish()
+        self.assertTrue(first["performed"])
+
+        second = self.run_publish()
+
+        self.assertTrue(second["success"], second.get("reasons"))
+        self.assertFalse(second["performed"], "no second push is needed")
+        self.assertTrue(second["published"])
+        self.assertTrue(second["verified"])
+        self.assertEqual(second["outcome"], branch_publish.ALREADY_PUBLISHED)
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+
+class TestDryRun(_PublishBase):
+    """AC12 — dry run reports the decision and mutates nothing."""
+
+    def test_dry_run_reports_intent_without_publishing(self):
+        self.write_lock()
+
+        result = self.run_publish(dry_run=True)
+
+        self.assertTrue(result["success"])
+        self.assertTrue(result["dry_run"])
+        self.assertTrue(result["would_publish"])
+        self.assertFalse(result["performed"])
+        self.assertIsNone(self.remote_head(), "dry run must not publish")
+
+    def test_dry_run_and_apply_agree_on_a_refusal(self):
+        """AC11 — the reported decision does not depend on which mode ran."""
+        self.write_lock(claimant={"username": "someone-else", "profile": PROFILE})
+
+        dry = self.run_publish(dry_run=True)
+        applied = self.run_publish()
+
+        self.assertFalse(dry["success"])
+        self.assertFalse(applied["success"])
+        self.assertEqual(dry["reasons"], applied["reasons"])
+
+
+class TestRenewalUnblocked(_PublishBase):
+    """AC20/AC21 — renewal is permitted only after verified publication."""
+
+    def _renewal(self, remote_head):
+        return issue_lock_renewal.assess_exact_owner_lease_renewal(
+            issue_lock_store.read_lock_file(self.lock_path()),
+            issue_number=ISSUE, branch_name=BRANCH, worktree_path=self.worktree,
+            remote="prgs", org=ORG, repo=REPO,
+            identity=IDENTITY, profile=PROFILE,
+            current_branch=BRANCH, porcelain_status="", worktree_exists=True,
+            head_sha=self.head_sha, remote_head_sha=remote_head,
+        )
+
+    def test_renewal_refuses_before_publication(self):
+        self.write_lock()
+        decision = self._renewal(None)
+        self.assertFalse(decision["renewal_sanctioned"])
+        self.assertTrue(
+            any("unpublished branch" in r for r in decision["reasons"]),
+            decision["reasons"],
+        )
+
+    def test_renewal_is_sanctioned_after_publication(self):
+        self.write_lock()
+        result = self.run_publish()
+        self.assertTrue(result["verified"], result.get("reasons"))
+
+        decision = self._renewal(self.remote_head())
+
+        self.assertTrue(decision["renewal_sanctioned"], decision["reasons"])
+
+
+class TestProtectedAssetUntouched(unittest.TestCase):
+    """AC17 — no test or fixture may reference the protected worktree."""
+
+    def test_no_reference_to_the_protected_worktree(self):
+        here = os.path.dirname(os.path.abspath(__file__))
+        root = os.path.dirname(here)
+        needle = "issue-635-project-registry" + "-api"
+        for path in (
+            os.path.join(here, "test_issue_812_publish_unpublished_commit.py"),
+            os.path.join(root, "branch_publish.py"),
+        ):
+            with open(path, "r", encoding="utf-8") as fh:
+                body = fh.read()
+            self.assertNotIn(needle, body)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    unittest.main()

tests/test_issue_815_preflight_worktree_forwarding.py

@@ -0,0 +1,622 @@
+"""Publication preflight must receive the caller's worktree (#815).
+
+``gitea_publish_unpublished_issue_branch`` takes a **required** ``worktree_path``
+but resolved it only *after* ``verify_preflight_purity`` had already run. Every
+workspace-resolution layer behind that preflight — canonical root, root checkout,
+create-issue bootstrap, the #618 branches-only guard, issue scope, and anti-stomp
+— therefore received ``None`` and fell back to the MCP process root. A daemon
+rooted at the stable control checkout refused a valid registered issue worktree
+that the caller had explicitly supplied, before the publication assessor ever ran.
+
+The #812 suite could not see this. Its fixture sets ``self.worktree =
+os.path.realpath(self.repo)`` and patches ``PROJECT_ROOT`` to that same path, so
+the fallback resolved to the very worktree the argument named. The production
+topology — control checkout on a stable branch, issue worktree somewhere else —
+was never constructed, and preflight additionally no-ops under pytest unless
+production guards are forced on.
+
+These tests build that topology honestly:
+
+* ``PROJECT_ROOT`` is a control checkout sitting on ``master``;
+* the registered issue worktree is a genuinely separate path under ``branches/``;
+* ``GITEA_TEST_FORCE_PRODUCTION_GUARDS`` is set so the #618 guard really runs;
+* no patch makes the issue worktree appear to be ``PROJECT_ROOT``.
+
+Nothing here reads, writes, or references the protected worktree named in #812
+AC17 and #815 AC9. Every fixture is built from scratch against a local bare
+remote, so publication and read-after-write verification genuinely execute.
+"""
+
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+import tempfile
+import unittest
+from datetime import datetime, timedelta, timezone
+from unittest.mock import patch
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+import issue_lock_provenance  # noqa: E402
+import issue_lock_store  # noqa: E402
+import mcp_server  # noqa: E402
+from mutation_profile_fixture import shared_mutation_env  # noqa: E402
+
+ISSUE = 9815
+BRANCH = f"feat/issue-{ISSUE}-forwarding-fixture"
+WORKTREE_DIRNAME = BRANCH.replace("/", "-")
+IDENTITY = "example-user"
+PROFILE = "test-author-prgs"
+ORG = "Scaled-Tech-Consulting"
+REPO = "Gitea-Tools"
+GIT_REMOTE = "prgs"
+
+AUTHOR_PROFILE = {
+    "profile_name": "prgs-author",
+    "role": "author",
+    "allowed_operations": [
+        "gitea.read", "gitea.issue.create", "gitea.issue.comment",
+        "gitea.pr.create", "gitea.repo.commit", "gitea.branch.push",
+    ],
+    "forbidden_operations": [],
+    "audit_label": "prgs-author",
+}
+
+
+def _ts(hours: int) -> str:
+    return (
+        (datetime.now(timezone.utc) + timedelta(hours=hours))
+        .isoformat()
+        .replace("+00:00", "Z")
+    )
+
+
+class TestPreflightReceivesTheWorktree(unittest.TestCase):
+    """AC1 — the supplied path reaches ``verify_preflight_purity`` itself.
+
+    Follows the #735 capture pattern: replace preflight with a recorder that
+    raises, so the argument can be proven forwarded without performing the
+    mutation. This is the direct unit-level statement of the defect.
+    """
+
+    def _capture_preflight(self, **kwargs):
+        captured: dict = {}
+
+        def _capture(*a, **kw):
+            captured.update(kw)
+            captured["_args"] = a
+            raise RuntimeError("capture-only")
+
+        with patch.object(
+            mcp_server, "verify_preflight_purity", side_effect=_capture
+        ), patch.object(
+            mcp_server, "get_profile", return_value=AUTHOR_PROFILE
+        ), patch.object(
+            mcp_server, "_resolve",
+            return_value=("gitea.prgs.cc", ORG, REPO),
+        ), patch.object(
+            mcp_server, "_auth", return_value="token fake",
+        ), patch.object(
+            mcp_server.role_session_router,
+            "check_author_mutation_after_reviewer_stop",
+            return_value=(True, []),
+        ), patch.object(
+            mcp_server, "_namespace_mutation_block", return_value=None
+        ), patch.object(
+            mcp_server, "_profile_permission_block", return_value=None
+        ):
+            try:
+                mcp_server.gitea_publish_unpublished_issue_branch(**kwargs)
+            except RuntimeError as exc:
+                if "capture-only" not in str(exc) and not captured:
+                    raise
+        self.assertTrue(
+            captured,
+            "gitea_publish_unpublished_issue_branch never called "
+            "verify_preflight_purity",
+        )
+        return captured
+
+    def _base_kwargs(self, **overrides):
+        kwargs = {
+            "issue_number": ISSUE,
+            "branch_name": BRANCH,
+            "worktree_path": "/tmp/issue-815-explicit-worktree",
+            "expected_head": "a" * 40,
+            "remote": "prgs",
+            "org": ORG,
+            "repo": REPO,
+            "git_remote_name": GIT_REMOTE,
+        }
+        kwargs.update(overrides)
+        return kwargs
+
+    def test_explicit_worktree_path_reaches_preflight(self):
+        captured = self._capture_preflight(**self._base_kwargs())
+        self.assertEqual(
+            captured.get("worktree_path"),
+            os.path.realpath(os.path.abspath("/tmp/issue-815-explicit-worktree")),
+            "the authoritative worktree_path must be forwarded into preflight",
+        )
+
+    def test_forwarded_path_is_the_one_publication_uses(self):
+        """AC4 — preflight and publication must judge the same resolved path."""
+        raw = "/tmp/issue-815-explicit-worktree/./"
+        captured = self._capture_preflight(**self._base_kwargs(worktree_path=raw))
+        expected = os.path.realpath(os.path.abspath(raw.strip()))
+        self.assertEqual(captured.get("worktree_path"), expected)
+
+    def test_blank_worktree_path_forwards_none(self):
+        """AC5/AC8 — nothing usable supplied keeps the fail-closed fallback."""
+        for blank in ("", "   "):
+            with self.subTest(blank=repr(blank)):
+                captured = self._capture_preflight(
+                    **self._base_kwargs(worktree_path=blank)
+                )
+                self.assertIsNone(
+                    captured.get("worktree_path"),
+                    "a blank worktree must not resolve to the process cwd",
+                )
+
+    def test_org_repo_and_task_forwarding_are_not_regressed(self):
+        """AC6 — #735's org/repo forwarding and the task name still hold."""
+        captured = self._capture_preflight(**self._base_kwargs())
+        self.assertEqual(captured.get("org"), ORG)
+        self.assertEqual(captured.get("repo"), REPO)
+        self.assertEqual(captured.get("task"), "publish_unpublished_branch")
+
+
+class _ProductionTopologyBase(unittest.TestCase):
+    """Control checkout on master + a distinct registered issue worktree.
+
+    This is the shape the production daemon runs in and the shape the #812
+    fixture never built. ``PROJECT_ROOT`` is the control checkout; the issue
+    worktree is a real registered worktree at a different path; production
+    guards are forced on so the #618 branches-only guard genuinely evaluates.
+    """
+
+    def setUp(self):
+        self.lock_dir = tempfile.TemporaryDirectory()
+        self.addCleanup(self.lock_dir.cleanup)
+        self.origin = tempfile.mkdtemp(prefix="issue815-origin-")
+        self.control = tempfile.mkdtemp(prefix="issue815-control-")
+        for path in (self.origin, self.control):
+            self.addCleanup(
+                lambda p=path: subprocess.run(["rm", "-rf", p], check=False)
+            )
+        self._init_repos()
+        self.remotes = patch.dict(
+            mcp_server.REMOTES,
+            {"prgs": {"host": "gitea.prgs.cc", "org": ORG, "repo": REPO}},
+        )
+        self.remotes.start()
+        self.addCleanup(patch.stopall)
+        mcp_server._IDENTITY_CACHE.clear()
+
+    def _git(self, *args, cwd=None):
+        return subprocess.run(
+            ["git", "-C", cwd or self.control, *args],
+            capture_output=True, text=True, check=True,
+        )
+
+    def _init_repos(self):
+        subprocess.run(
+            ["git", "init", "-q", "--bare", "-b", "master", self.origin], check=True
+        )
+        self._git("init", "-q", "-b", "master")
+        self._git("config", "user.email", "[email protected]")
+        self._git("config", "user.name", "Test")
+        self._git("remote", "add", GIT_REMOTE, self.origin)
+
+        with open(os.path.join(self.control, "seed.txt"), "w") as fh:
+            fh.write("seed\n")
+        # The real repository gitignores branches/, so a registered worktree
+        # living there does not dirty the stable control checkout. Mirror that,
+        # or the #615 dirty-runtime block fires on the worktree we just created.
+        with open(os.path.join(self.control, ".gitignore"), "w") as fh:
+            fh.write("branches/\n")
+        self._git("add", "seed.txt", ".gitignore")
+        self._git("commit", "-q", "-m", "seed")
+        self.base_sha = self._git("rev-parse", "HEAD").stdout.strip()
+        self._git("push", "-q", GIT_REMOTE, "master")
+
+        # The control checkout STAYS on master. This is the whole point: the
+        # daemon's process root is the stable control checkout, never the
+        # worktree the publication targets.
+        self.worktree = os.path.realpath(
+            os.path.join(self.control, "branches", WORKTREE_DIRNAME)
+        )
+        self._git("worktree", "add", "-q", "-b", BRANCH, self.worktree, "master")
+
+        with open(os.path.join(self.worktree, "work.txt"), "w") as fh:
+            fh.write("unpublished implementation\n")
+        self._git("add", "work.txt", cwd=self.worktree)
+        self._git("commit", "-q", "-m", "unpublished implementation", cwd=self.worktree)
+        self.head_sha = self._git("rev-parse", "HEAD", cwd=self.worktree).stdout.strip()
+
+        self.control_branch = self._git(
+            "rev-parse", "--abbrev-ref", "HEAD"
+        ).stdout.strip()
+
+    # ── durable lock naming the caller and the issue worktree ────────────
+    def lock_path(self):
+        return issue_lock_store.lock_file_path(
+            remote="prgs", org=ORG, repo=REPO, issue_number=ISSUE,
+            lock_dir=self.lock_dir.name,
+        )
+
+    def write_lock(self, *, bind_session=True, **overrides):
+        path = self.lock_path()
+        claimant = overrides.pop(
+            "claimant", {"username": IDENTITY, "profile": PROFILE}
+        )
+        pid = overrides.pop("session_pid", os.getpid())
+        lease = {
+            "operation_type": issue_lock_store.AUTHOR_ISSUE_WORK_LEASE,
+            "issue_number": ISSUE,
+            "pr_number": None,
+            "branch": overrides.get("branch_name", BRANCH),
+            "worktree_path": overrides.get("worktree_path", self.worktree),
+            "claimant": claimant,
+            "created_at": _ts(-2),
+            "last_heartbeat_at": _ts(-2),
+            "expires_at": _ts(-1),
+        }
+        lease.update(overrides.pop("work_lease", {}))
+        data = {
+            "issue_number": ISSUE,
+            "branch_name": BRANCH,
+            "remote": "prgs",
+            "org": ORG,
+            "repo": REPO,
+            "worktree_path": self.worktree,
+            "session_pid": pid,
+            "pid": pid,
+            "lock_generation": 1,
+            "work_lease": lease,
+            "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+                tool="gitea_lock_issue", claimant=claimant
+            ),
+        }
+        data.update(overrides)
+        data["lock_file_path"] = path
+        issue_lock_store.save_lock_file(path, data)
+        # Bind the session pointer so the #683 issue-scope guard resolves an
+        # owning issue for this author session. In real production the publish
+        # task does not require a session lock — require_author_lock is keyed on
+        # the test-only production_guards_forced() flag, which this suite must
+        # set to make preflight run at all — so this pointer is fixture
+        # scaffolding to clear a guard production would not apply here, never a
+        # softening of the worktree-forwarding behaviour under test. The
+        # preflight-negative cases below leave it unbound precisely so the #618
+        # guard is reached with no session fallback to rescue a bad worktree.
+        if bind_session:
+            pointer = {
+                "pid": os.getpid(),
+                "lock_file_path": path,
+                "issue_number": ISSUE,
+                "branch_name": data["branch_name"],
+                "remote": "prgs",
+                "org": ORG,
+                "repo": REPO,
+            }
+            issue_lock_store.save_lock_file(
+                issue_lock_store.session_pointer_path(self.lock_dir.name), pointer
+            )
+        return path
+
+    def _tool_env(self):
+        env = shared_mutation_env(
+            PROFILE, include_example_repo=True,
+            GITEA_ISSUE_LOCK_DIR=self.lock_dir.name,
+        )
+        env["GITEA_ISSUE_LOCK_DIR"] = self.lock_dir.name
+        # The defect only exists where preflight actually runs. Under pytest the
+        # production root/branches/scope guards are skipped unless forced on, so
+        # force them: this test exists to exercise the #618 guard, not to bypass
+        # it. Parity is pinned to the server's own startup head so repointing
+        # PROJECT_ROOT does not read as a stale daemon.
+        env["GITEA_TEST_FORCE_PRODUCTION_GUARDS"] = "1"
+        # Production is a promoted stable-control runtime. The pytest process
+        # itself runs from a branches/ worktree, which the #615 runtime-mode
+        # gate correctly classifies as dev-test; declaring the sanctioned mode
+        # models the production daemon rather than defeating the gate. Without
+        # this, forcing production guards on would trip the *runtime-mode* block
+        # for a reason unrelated to the #815 worktree-forwarding defect.
+        env["GITEA_MCP_RUNTIME_MODE"] = "stable-control"
+        startup_head = mcp_server._STARTUP_PARITY.get("startup_head") or ""
+        env["GITEA_TEST_CURRENT_HEAD"] = startup_head
+        env["GITEA_TEST_LIVE_REMOTE_HEAD"] = startup_head
+        return env
+
+    def run_publish(self, *, open_prs=None, expected_head=None, **kwargs):
+        """Drive the public tool with PROJECT_ROOT pinned to the CONTROL checkout."""
+        env = self._tool_env()
+        with patch(
+            "mcp_server._list_open_pulls", return_value=list(open_prs or [])
+        ), patch(
+            "mcp_server._auth", return_value="token x"
+        ), patch(
+            "mcp_server.get_auth_header", return_value="token x"
+        ), patch(
+            "mcp_server._work_lease_claimant",
+            return_value={"username": IDENTITY, "profile": PROFILE},
+        ), patch.object(
+            # NOTE: the control checkout — deliberately NOT self.worktree.
+            mcp_server, "PROJECT_ROOT", self.control
+        ), patch.dict(os.environ, env, clear=True):
+            os.environ["GITEA_ISSUE_LOCK_DIR"] = self.lock_dir.name
+            return mcp_server.gitea_publish_unpublished_issue_branch(
+                issue_number=kwargs.pop("issue_number", ISSUE),
+                branch_name=kwargs.pop("branch_name", BRANCH),
+                worktree_path=kwargs.pop("worktree_path", self.worktree),
+                expected_head=expected_head or self.head_sha,
+                remote="prgs",
+                git_remote_name=kwargs.pop("git_remote_name", GIT_REMOTE),
+                **kwargs,
+            )
+
+    def remote_head(self, branch=BRANCH):
+        res = subprocess.run(
+            ["git", "-C", self.origin, "rev-parse", "--verify", "--quiet", branch],
+            capture_output=True, text=True, check=False,
+        )
+        return (res.stdout or "").strip() or None
+
+
+class TestForwardingClearsThe618Guard(_ProductionTopologyBase):
+    """AC2 — the faithful production reproduction, and the sharpest fix proof.
+
+    The production recovery worker had **no** session issue lock — acquiring one
+    was the very thing the deadlock prevented — so preflight had nothing but the
+    explicit ``worktree_path`` argument to resolve the workspace from. This class
+    reproduces exactly that: no session pointer is bound, so there is no
+    author-lock fallback to rescue a dropped argument.
+
+    With the argument forwarded (fixed source) the #618 branches-only guard
+    accepts the registered issue worktree and the call advances to the next
+    guard. With the argument dropped (the buggy source this issue reports)
+    preflight falls back to ``PROJECT_ROOT`` — the stable control checkout — and
+    the #618 guard traps the call there. The two outcomes are told apart by the
+    guard that fired, on its own error text.
+
+    This test therefore *fails* against the unpatched source (the call is trapped
+    at #618 instead of clearing it), which is what makes it a regression rather
+    than a smoke test.
+    """
+
+    _CONTROL_CHECKOUT_MARKERS = ("stable control checkout", "#618")
+
+    def test_explicit_worktree_clears_618_without_a_session_lock(self):
+        # No write_lock(): the session is deliberately unbound, as in production.
+        with self.assertRaises(RuntimeError) as ctx:
+            self.run_publish()
+        message = str(ctx.exception)
+        # The workspace guard is satisfied — the failure is the *later* scope
+        # guard (no owning issue), never the control-checkout refusal. If the
+        # argument were dropped, this call would be trapped at #618 instead.
+        for marker in self._CONTROL_CHECKOUT_MARKERS:
+            self.assertNotIn(
+                marker, message,
+                f"the explicit worktree must clear #618; got a control-checkout "
+                f"refusal instead: {message}",
+            )
+        self.assertIn(
+            "owning issue", message,
+            f"expected the downstream scope guard to fire, got: {message}",
+        )
+        self.assertIsNone(self.remote_head())
+
+    def test_dropped_argument_would_be_trapped_at_618(self):
+        # Simulate the buggy call shape directly: no session lock, and preflight
+        # given no worktree, exactly as the unpatched source left it. This pins
+        # the control-checkout refusal that the fix eliminates, so the pair of
+        # tests brackets the defect from both sides regardless of which source
+        # version is loaded.
+        env = self._tool_env()
+        with patch(
+            "mcp_server._list_open_pulls", return_value=[]
+        ), patch(
+            "mcp_server._auth", return_value="token x"
+        ), patch(
+            "mcp_server.get_auth_header", return_value="token x"
+        ), patch(
+            "mcp_server._work_lease_claimant",
+            return_value={"username": IDENTITY, "profile": PROFILE},
+        ), patch.object(
+            mcp_server, "PROJECT_ROOT", self.control
+        ), patch.dict(os.environ, env, clear=True):
+            os.environ["GITEA_ISSUE_LOCK_DIR"] = self.lock_dir.name
+            with self.assertRaises(RuntimeError) as ctx:
+                # Drive verify_preflight_purity the way the buggy body did:
+                # no worktree_path forwarded at all.
+                mcp_server.verify_preflight_purity(
+                    "prgs",
+                    task="publish_unpublished_branch",
+                    org=ORG,
+                    repo=REPO,
+                )
+        message = str(ctx.exception)
+        self.assertTrue(
+            any(m in message for m in self._CONTROL_CHECKOUT_MARKERS),
+            f"a dropped worktree must trap at the control checkout: {message}",
+        )
+        self.assertIsNone(self.remote_head())
+
+
+class TestProductionTopologyPublishes(_ProductionTopologyBase):
+    """AC2/AC4/AC7 — the explicit registered worktree is what preflight validates."""
+
+    def test_fixture_is_genuinely_the_production_topology(self):
+        """Guard the guard: if this drifts, the regression stops meaning anything."""
+        self.assertNotEqual(
+            os.path.realpath(self.control), self.worktree,
+            "the issue worktree must not be PROJECT_ROOT",
+        )
+        self.assertEqual(
+            self.control_branch, "master",
+            "the control checkout must sit on a stable branch",
+        )
+        self.assertTrue(
+            os.path.realpath(self.worktree).startswith(
+                os.path.realpath(os.path.join(self.control, "branches")) + os.sep
+            ),
+            "the issue worktree must live under branches/",
+        )
+        listed = subprocess.run(
+            ["git", "-C", self.control, "worktree", "list"],
+            capture_output=True, text=True, check=True,
+        ).stdout
+        self.assertIn(
+            self.worktree, listed, "the issue worktree must be genuinely registered"
+        )
+
+    def test_publishes_from_a_control_rooted_daemon(self):
+        """The exact production failure: this refused with #618 before the fix."""
+        self.write_lock()
+        self.assertIsNone(self.remote_head(), "fixture must start unpublished")
+        res = self.run_publish()
+        self.assertTrue(res.get("success"), res)
+        self.assertTrue(res.get("performed"), res)
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+    def test_dry_run_uses_the_explicit_worktree(self):
+        """AC4 — dry-run reaches the same decision without publishing."""
+        self.write_lock()
+        res = self.run_publish(dry_run=True)
+        self.assertTrue(res.get("success"), res)
+        self.assertFalse(res.get("performed"), res)
+        self.assertTrue(res.get("would_publish"), res)
+        self.assertIsNone(self.remote_head(), "dry-run must not publish")
+
+    def test_dry_run_and_apply_agree_on_the_same_worktree(self):
+        """AC4 — both paths resolve the same workspace, so both succeed."""
+        self.write_lock()
+        dry = self.run_publish(dry_run=True)
+        self.assertTrue(dry.get("would_publish"), dry)
+        applied = self.run_publish()
+        self.assertTrue(applied.get("performed"), applied)
+        self.assertEqual(self.remote_head(), self.head_sha)
+
+    def test_read_after_write_verification_still_runs(self):
+        """AC6 — PR #814's post-publication verification is unchanged."""
+        self.write_lock()
+        res = self.run_publish()
+        self.assertTrue(res.get("verified"), res)
+        self.assertEqual(res.get("remote_head_sha"), self.head_sha)
+
+
+class TestProductionTopologyFailsClosed(_ProductionTopologyBase):
+    """AC3/AC5/AC8 — the fix does not weaken any refusal.
+
+    A refusal reaches the caller by one of two mechanisms, and this class holds
+    them apart deliberately. A bad *workspace* is caught by the #618 preflight
+    guard, which raises before the assessor is built. A bad *content/ownership*
+    fact passes preflight (the worktree itself is fine) and is then refused by
+    the publication assessor, which returns ``success: False``. Both are
+    fail-closed; asserting the wrong mechanism would hide a regression.
+    """
+
+    # ── #618 preflight refusals: no session lock, so nothing rescues a bad
+    #    workspace and the guard fires exactly as it does in production ──────
+    def _assert_preflight_raises(self, **kwargs):
+        with self.assertRaises(RuntimeError) as ctx:
+            self.run_publish(**kwargs)
+        self.assertIsNone(
+            self.remote_head(), "a blocked publication must not reach the remote"
+        )
+        return str(ctx.exception)
+
+    def test_blank_worktree_path_fails_closed_via_618(self):
+        """AC5 — a blank path forwards None, so preflight sees the control root."""
+        for blank in ("", "   "):
+            with self.subTest(blank=repr(blank)):
+                message = self._assert_preflight_raises(worktree_path=blank)
+                self.assertIn("618", message)
+
+    def test_control_checkout_as_worktree_fails_closed_via_618(self):
+        """AC5 — naming the stable control checkout explicitly is still refused."""
+        message = self._assert_preflight_raises(worktree_path=self.control)
+        self.assertIn("618", message)
+
+    def test_unregistered_directory_fails_closed(self):
+        """AC3 — a plain directory under branches/ is not a registered worktree."""
+        bogus = os.path.join(self.control, "branches", "not-a-worktree")
+        os.makedirs(bogus, exist_ok=True)
+        self._assert_preflight_raises(worktree_path=bogus)
+
+    def test_missing_worktree_path_fails_closed(self):
+        """AC3 — a path that does not exist is refused, not silently replaced."""
+        missing = os.path.join(self.control, "branches", "absent-worktree")
+        self._assert_preflight_raises(worktree_path=missing)
+
+    # ── assessor refusals: preflight passes on a valid worktree, then the
+    #    publication assessor refuses on content/ownership evidence ──────────
+    def _assert_assessor_refuses(self, **kwargs):
+        res = self.run_publish(**kwargs)
+        self.assertFalse(res.get("success"), res)
+        self.assertFalse(res.get("performed"), res)
+        self.assertIsNone(self.remote_head())
+        return res
+
+    def test_changed_local_head_still_refuses(self):
+        """AC6 — the declared expected_head remains authoritative."""
+        self.write_lock()
+        self._assert_assessor_refuses(expected_head="b" * 40)
+
+    def test_foreign_claimant_still_refuses(self):
+        """AC6 — ownership still comes from the durable lock record."""
+        self.write_lock(claimant={"username": "someone-else", "profile": PROFILE})
+        self._assert_assessor_refuses()
+
+    def test_dirty_worktree_still_refuses(self):
+        """AC6 — cleanliness enforcement survives the forwarding change."""
+        self.write_lock()
+        with open(os.path.join(self.worktree, "work.txt"), "a") as fh:
+            fh.write("uncommitted drift\n")
+        self._assert_assessor_refuses()
+
+    def test_competing_open_pr_still_refuses(self):
+        """AC6 — a rival claim on another branch still blocks."""
+        self.write_lock()
+        self._assert_assessor_refuses(
+            open_prs=[{"number": 4242, "head": {"ref": f"fix/issue-{ISSUE}-rival"}}]
+        )
+
+    def test_issue_lock_record_is_not_mutated_by_a_refusal(self):
+        """AC6 — record separation (#812 AC23) is unaffected by this change."""
+        path = self.write_lock()
+        with open(path, "rb") as fh:
+            before = fh.read()
+        self._assert_assessor_refuses(expected_head="c" * 40)
+        with open(path, "rb") as fh:
+            self.assertEqual(before, fh.read())
+
+
+class TestProtectedFixtureNotReferenced(unittest.TestCase):
+    """AC9 — this regression never names the protected #635 fixture.
+
+    The forbidden tokens are reconstructed from fragments so this assertion
+    file does not itself contain them and produce a false positive.
+    """
+
+    def test_no_reference_to_the_protected_worktree(self):
+        forbidden = [
+            "issue-635-" + "project-registry-api",
+            "b2f6e9a6dc40e9651ef8" + "76f322dd0a68bddebfd8",
+        ]
+        here = os.path.abspath(__file__)
+        with open(here, "r", encoding="utf-8") as fh:
+            text = fh.read()
+        for token in forbidden:
+            self.assertNotIn(
+                token, text,
+                f"the protected #635 fixture must not be referenced: {token}",
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_master_parity_gate.py

@@ -78,6 +78,95 @@ class TestBlockReasonsAndReport(unittest.TestCase):
         self.assertTrue(report["recovery"])
 
 
+class TestLiveRemoteParity(unittest.TestCase):
+    """#610: parity must account for the live remote master, not just local.
+
+    The daemon can be stale relative to the live remote target while the local
+    checkout HEAD still matches the daemon's startup commit, so local parity
+    reports green even though a mutation would run against outdated code.
+    """
+
+    SHA_C = "c" * 40
+
+    def test_distinguishes_three_shas(self):
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_B)
+        self.assertEqual(res["daemon_start_head"], SHA_A)
+        self.assertEqual(res["local_head"], SHA_A)
+        self.assertEqual(res["live_remote_head"], SHA_B)
+
+    def test_mutation_safe_only_when_all_three_match(self):
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_A)
+        self.assertTrue(res["mutation_safe"])
+        self.assertTrue(res["live_known"])
+        self.assertFalse(res["live_stale"])
+
+    def test_live_stale_when_remote_advanced_past_daemon(self):
+        # Local checkout still matches the daemon start (local parity green),
+        # but the live remote master has advanced -> daemon is live-stale.
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_B)
+        self.assertTrue(res["in_parity"])  # local parity still green
+        self.assertTrue(res["live_stale"])
+        self.assertFalse(res["mutation_safe"])
+        self.assertTrue(any("live" in r.lower() for r in res["reasons"]))
+
+    def test_live_unknown_is_not_mutation_safe_but_not_stale(self):
+        # Non-goal: unfetchable live remote must not be treated as stale for
+        # read-only, but a mutation-safe claim fails closed.
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=None)
+        self.assertFalse(res["live_known"])
+        self.assertFalse(res["mutation_safe"])
+        self.assertFalse(res["live_stale"])
+        self.assertTrue(res["in_parity"])
+
+    def test_default_live_remote_preserves_legacy_shape(self):
+        # Callers that do not supply a live head keep the pre-#610 behavior:
+        # in-parity, not live-stale, no live-derived block.
+        res = mp.assess_master_parity({"startup_head": SHA_A}, SHA_A)
+        self.assertFalse(res["live_stale"])
+        self.assertEqual(mp.parity_block_reasons(res), [])
+
+
+class TestLiveStaleBlockAndReport(unittest.TestCase):
+    """#610: live-staleness must block mutations and surface a typed blocker."""
+
+    def test_live_stale_produces_block_reasons(self):
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_B)
+        self.assertTrue(mp.parity_block_reasons(res))
+
+    def test_disable_env_suppresses_live_stale_block(self):
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_B)
+        with patch.dict(os.environ, {mp.ENV_DISABLE: "1"}):
+            self.assertEqual(mp.parity_block_reasons(res), [])
+
+    def test_resolver_disagreement_returns_typed_blocker(self):
+        # Parity says local-green, resolver says restart required -> disagreement
+        # is a typed, fail-closed blocker naming the resolver as authoritative.
+        res = mp.assess_master_parity({"startup_head": SHA_A}, SHA_A)
+        blocker = mp.parity_resolver_disagreement(res, resolver_restart_required=True)
+        self.assertIsNotNone(blocker)
+        self.assertEqual(blocker["kind"], "parity_resolver_disagreement")
+        self.assertTrue(blocker["restart_required"])
+        self.assertTrue(blocker["resolver_authoritative"])
+
+    def test_no_disagreement_when_resolver_agrees(self):
+        res = mp.assess_master_parity({"startup_head": SHA_A}, SHA_A)
+        self.assertIsNone(
+            mp.parity_resolver_disagreement(res, resolver_restart_required=False))
+
+    def test_live_stale_report_names_live_remote(self):
+        res = mp.assess_master_parity(
+            {"startup_head": SHA_A}, SHA_A, live_remote_head=SHA_B)
+        report = mp.parity_report(res)
+        self.assertEqual(report["live_remote_head"], SHA_B)
+        self.assertTrue(report["restart_required"])
+
+
 class TestReadGitHead(unittest.TestCase):
     def test_test_override_takes_precedence(self):
         with patch.dict(os.environ, {mp.ENV_TEST_CURRENT_HEAD: SHA_B}):
@@ -95,6 +184,149 @@ class TestReadGitHead(unittest.TestCase):
             self.assertIsNone(mp.read_git_head(""))
 
 
+class TestReadRemoteMasterHead(unittest.TestCase):
+    """#610: live remote master head reader (env-overridable, fails to None)."""
+
+    def test_test_override_takes_precedence(self):
+        with patch.dict(os.environ, {mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_B}):
+            self.assertEqual(mp.read_remote_master_head("/nonexistent"), SHA_B)
+
+    def test_blank_override_is_none(self):
+        with patch.dict(os.environ, {mp.ENV_TEST_LIVE_REMOTE_HEAD: "   "}):
+            self.assertIsNone(mp.read_remote_master_head("/nonexistent"))
+
+    def test_unfetchable_remote_is_none(self):
+        # No override; a bogus root/remote must fail closed to None, never raise.
+        env = {k: v for k, v in os.environ.items()
+               if k != mp.ENV_TEST_LIVE_REMOTE_HEAD}
+        with patch.dict(os.environ, env, clear=True):
+            self.assertIsNone(
+                mp.read_remote_master_head("/nonexistent", remote="nope"))
+
+
+class TestRemoteHeadCache(unittest.TestCase):
+    """#610: live remote reads are cached with a TTL to stay off the network.
+
+    The parity gate runs on every mutation and every runtime-context read, so an
+    unbounded ``git ls-remote`` per call would be a latency/flakiness regression.
+    """
+
+    def setUp(self):
+        # These cases intentionally exercise the subprocess/cache path, so they
+        # opt out of suite-wide hermetic mode (PR #788 F1).
+        self._saved_hermetic = mp.hermetic_test_mode()
+        mp.set_hermetic_test_mode(False)
+        mp._clear_remote_head_cache()
+        env = {
+            k: v for k, v in os.environ.items()
+            if k not in (mp.ENV_TEST_LIVE_REMOTE_HEAD,
+                         mp.ENV_TEST_ALLOW_LIVE_REMOTE_PROBE,
+                         "PYTEST_CURRENT_TEST")
+        }
+        # Allow the probe path under hermetic defenses while still mocking
+        # subprocess so no real network call runs.
+        env[mp.ENV_TEST_ALLOW_LIVE_REMOTE_PROBE] = "1"
+        self._env = patch.dict(os.environ, env, clear=True)
+        self._env.start()
+        self.addCleanup(self._env.stop)
+        self.addCleanup(mp._clear_remote_head_cache)
+        self.addCleanup(
+            lambda: mp.set_hermetic_test_mode(self._saved_hermetic)
+        )
+
+    def _fake_run(self, sha):
+        class _R:
+            returncode = 0
+            stdout = f"{sha}\trefs/heads/master\n"
+        calls = {"n": 0}
+
+        def run(*args, **kwargs):
+            calls["n"] += 1
+            return _R()
+        return run, calls
+
+    def test_second_call_within_ttl_uses_cache(self):
+        run, calls = self._fake_run(SHA_B)
+        with patch.object(mp.subprocess, "run", run):
+            a = mp.read_remote_master_head("/repo", remote="prgs", ttl=100)
+            b = mp.read_remote_master_head("/repo", remote="prgs", ttl=100)
+        self.assertEqual(a, SHA_B)
+        self.assertEqual(b, SHA_B)
+        self.assertEqual(calls["n"], 1)
+
+    def test_zero_ttl_bypasses_cache(self):
+        run, calls = self._fake_run(SHA_B)
+        with patch.object(mp.subprocess, "run", run):
+            mp.read_remote_master_head("/repo", remote="prgs", ttl=0)
+            mp.read_remote_master_head("/repo", remote="prgs", ttl=0)
+        self.assertEqual(calls["n"], 2)
+
+    def test_env_override_never_touches_subprocess(self):
+        run, calls = self._fake_run(SHA_B)
+        with patch.dict(os.environ, {mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_A}):
+            with patch.object(mp.subprocess, "run", run):
+                self.assertEqual(
+                    mp.read_remote_master_head("/repo", remote="prgs"), SHA_A)
+        self.assertEqual(calls["n"], 0)
+
+
+class TestHermeticLiveRemoteReads(unittest.TestCase):
+    """#610 / PR #788 F1/F2: suite hermetic mode never hits the network."""
+
+    def setUp(self):
+        self._saved = mp.hermetic_test_mode()
+        mp.set_hermetic_test_mode(True)
+        mp._clear_remote_head_cache()
+        self.addCleanup(lambda: mp.set_hermetic_test_mode(self._saved))
+        self.addCleanup(mp._clear_remote_head_cache)
+
+    def test_hermetic_mode_returns_none_without_subprocess(self):
+        run_calls = {"n": 0}
+
+        def boom(*args, **kwargs):
+            run_calls["n"] += 1
+            raise AssertionError("ls-remote must not run under hermetic mode")
+
+        env = {
+            k: v for k, v in os.environ.items()
+            if k not in (mp.ENV_TEST_LIVE_REMOTE_HEAD,
+                         mp.ENV_TEST_ALLOW_LIVE_REMOTE_PROBE)
+        }
+        with patch.dict(os.environ, env, clear=True):
+            with patch.object(mp.subprocess, "run", boom):
+                self.assertIsNone(
+                    mp.read_remote_master_head("/repo", remote="prgs")
+                )
+        self.assertEqual(run_calls["n"], 0)
+
+    def test_hermetic_mode_survives_clear_true_env(self):
+        """Module flag, not env pin: clear=True cannot re-enable the probe."""
+        run_calls = {"n": 0}
+
+        def boom(*args, **kwargs):
+            run_calls["n"] += 1
+            raise AssertionError("ls-remote must not run after clear=True")
+
+        with patch.dict(os.environ, {}, clear=True):
+            with patch.object(mp.subprocess, "run", boom):
+                self.assertIsNone(mp.read_remote_master_head("/repo"))
+        self.assertEqual(run_calls["n"], 0)
+
+    def test_explicit_override_still_wins_under_hermetic(self):
+        run_calls = {"n": 0}
+
+        def boom(*args, **kwargs):
+            run_calls["n"] += 1
+            raise AssertionError("override must bypass subprocess")
+
+        with patch.dict(os.environ, {mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_B}):
+            with patch.object(mp.subprocess, "run", boom):
+                self.assertEqual(
+                    mp.read_remote_master_head("/repo"), SHA_B
+                )
+        self.assertEqual(run_calls["n"], 0)
+
+
 class TestServerWiring(unittest.TestCase):
     """Integration with the gate choke point in the server namespace."""
 
@@ -105,6 +337,13 @@ class TestServerWiring(unittest.TestCase):
         self._saved = self.srv._STARTUP_PARITY
         self.srv._STARTUP_PARITY = {"root": self.srv.PROJECT_ROOT,
                                     "startup_head": SHA_A}
+        # Keep the live-remote read hermetic (no real ls-remote network call):
+        # default the live master to the daemon start so parity is fully green
+        # unless a test overrides the live head explicitly (#610).
+        self._live_patch = patch.dict(
+            os.environ, {mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_A})
+        self._live_patch.start()
+        self.addCleanup(self._live_patch.stop)
 
     def tearDown(self):
         self.srv._STARTUP_PARITY = self._saved
@@ -147,6 +386,36 @@ class TestServerWiring(unittest.TestCase):
             self.assertTrue(out["in_parity"])
             self.assertNotIn("report", out)
 
+    # --- #610: live-remote wiring -------------------------------------------
+
+    def test_live_stale_blocks_mutation_though_local_green(self):
+        # Local checkout matches the daemon start (local parity green) but the
+        # live remote master has advanced -> mutations must fail closed.
+        with patch.dict(os.environ, {mp.ENV_TEST_CURRENT_HEAD: SHA_A,
+                                     mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_B}):
+            self.assertEqual(self.srv._master_parity_block("gitea.read"), [])
+            self.assertTrue(
+                self.srv._master_parity_block("gitea.pr.create"))
+
+    def test_assess_tool_exposes_three_distinct_shas(self):
+        with patch.dict(os.environ, {mp.ENV_TEST_CURRENT_HEAD: SHA_A,
+                                     mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_B}):
+            out = self.srv.gitea_assess_master_parity(remote="prgs")
+            self.assertEqual(out["daemon_start_head"], SHA_A)
+            self.assertEqual(out["local_head"], SHA_A)
+            self.assertEqual(out["live_remote_head"], SHA_B)
+            self.assertTrue(out["live_stale"])
+            self.assertFalse(out["mutation_safe"])
+            self.assertIn("report", out)
+
+    def test_assess_tool_mutation_safe_when_all_three_match(self):
+        with patch.dict(os.environ, {mp.ENV_TEST_CURRENT_HEAD: SHA_A,
+                                     mp.ENV_TEST_LIVE_REMOTE_HEAD: SHA_A}):
+            out = self.srv.gitea_assess_master_parity(remote="prgs")
+            self.assertTrue(out["mutation_safe"])
+            self.assertFalse(out["live_stale"])
+            self.assertNotIn("report", out)
+
 
 if __name__ == "__main__":
     unittest.main()

tests/test_task_capability_role_invariants.py

@@ -139,6 +139,9 @@ EXPECTED_ROLE_EXCLUSIVE_TASKS = frozenset(
         "gitea_release_merger_pr_lease",
         "create_branch",
         "push_branch",
+        # #812 AC20: publishing an unpublished local head is author-only for the
+        # same reason every other push is — it writes a branch to the remote.
+        "publish_unpublished_branch",
         "create_pr",
         "commit_files",
         "gitea_commit_files",

tests/test_webui_architecture_docs.py

@@ -0,0 +1,149 @@
+"""Documentation acceptance for the web console architecture ADR (#632 / epic #631).
+
+Enforces the acceptance criteria of issue #632:
+
+* AC1 — the ADR exists and covers layers, authority, phases, API versioning,
+  and a page map.
+* AC2 — every #631 child (#632–#651) maps to at least one architectural
+  component.
+* AC3 — the closed MVP (#425–#436) is stated as foundation, not recreated.
+* AC4 — forbidden paths are explicit: raw provider incidents as work,
+  browser-held tokens, process-kill recovery.
+* AC5 — a controller can approve the document without reading chat history.
+
+Plus the linkage requirement: ``docs/webui-local-dev.md`` cross-links the ADR.
+"""
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+ADR = (
+    REPO_ROOT
+    / "docs"
+    / "architecture"
+    / "webui-control-plane-console-architecture-adr.md"
+)
+ADR_BASENAME = "webui-control-plane-console-architecture-adr.md"
+LOCAL_DEV = REPO_ROOT / "docs" / "webui-local-dev.md"
+
+# Epic #631 children, phases 1-4 (twenty capability areas).
+EPIC_CHILDREN = tuple(f"#{number}" for number in range(632, 652))
+
+
+def _read(path: Path) -> str:
+    assert path.is_file(), f"missing {path.relative_to(REPO_ROOT)}"
+    return path.read_text(encoding="utf-8")
+
+
+def test_ac1_adr_exists_with_required_sections():
+    text = _read(ADR)
+    lower = text.lower()
+    assert text.lstrip().startswith("#"), "ADR lacks a title"
+    assert "#631" in text and "#632" in text
+    for heading in (
+        "## 2. Decision summary",
+        "## 4. Authority boundaries",
+        "## 5. Request flow and the redaction boundary",
+        "## 6. API naming and versioning",
+        "## 7. Page map",
+        "## 8. Component ownership",
+        "## 9. Phase gates",
+        "## 11. Forbidden paths",
+    ):
+        assert heading in text, f"ADR must contain section {heading!r}"
+    assert "browser ui" in lower and "domain loader" in lower
+    assert "control-plane db" in lower and "capability gate" in lower
+
+
+def test_ac1_api_versioning_is_decided_including_legacy_routes():
+    text = _read(ADR)
+    assert "/api/v1/" in text, "ADR must decide the versioned API prefix"
+    assert "/api/v2/" in text, "ADR must state how breaking changes are handled"
+    lower = text.lower()
+    assert "compatibility alias" in lower, (
+        "ADR must say what happens to the existing unversioned MVP exports"
+    )
+
+
+def test_ac1_page_map_covers_mvp_routes():
+    text = _read(ADR)
+    for route in ("`/`", "`/health`", "`/projects`", "`/prompts`", "`/runtime`",
+                  "`/audit`", "`/actions`"):
+        assert route in text, f"page map must account for MVP route {route}"
+
+
+def test_ac2_every_epic_child_maps_to_a_component():
+    text = _read(ADR)
+    ownership = text.split("## 8. Component ownership", 1)[-1].split("## 9.", 1)[0]
+    missing = [child for child in EPIC_CHILDREN if child not in ownership]
+    assert not missing, (
+        f"epic #631 children without an architectural component: {missing}"
+    )
+
+
+def test_ac2_every_child_row_declares_a_phase():
+    text = _read(ADR)
+    ownership = text.split("## 8. Component ownership", 1)[-1].split("## 9.", 1)[0]
+    for child in EPIC_CHILDREN:
+        row = next(
+            (line for line in ownership.splitlines() if line.startswith(f"| {child} ")),
+            None,
+        )
+        assert row is not None, f"no ownership row for {child}"
+        assert row.rstrip().endswith(("| 1 |", "| 2 |", "| 3 |", "| 4 |")), (
+            f"ownership row for {child} must end with its phase: {row!r}"
+        )
+
+
+def test_ac3_mvp_is_foundation_not_recreated():
+    text = _read(ADR)
+    assert "#425" in text and "#436" in text
+    lower = text.lower()
+    assert "do not recreate" in lower or "recreating mvp scope" in lower
+    assert "retained and evolved" in lower
+
+
+def test_ac4_forbidden_paths_are_explicit():
+    text = _read(ADR)
+    forbidden = text.split("## 11. Forbidden paths", 1)[-1].split("## 12.", 1)[0]
+    lower = forbidden.lower()
+    assert "raw provider incidents" in lower and "#612" in forbidden
+    assert "browser-held tokens" in lower
+    assert "process-kill recovery" in lower and "#630" in forbidden
+    assert "ungated browser mutations" in lower
+
+
+def test_ac5_approval_checklist_is_self_contained():
+    text = _read(ADR)
+    assert "## 12. Approval checklist" in text
+    checklist = text.split("## 12. Approval checklist", 1)[-1].split("## 13.", 1)[0]
+    for marker in ("1.", "2.", "3.", "4.", "5.", "6."):
+        assert marker in checklist, f"approval checklist missing item {marker}"
+
+
+def test_adr_states_the_two_boundary_invariants():
+    text = _read(ADR)
+    lower = text.lower()
+    assert "no secrets to the browser" in lower
+    assert "no ungated mutations" in lower
+
+
+def test_open_questions_are_recorded_not_implied():
+    text = _read(ADR)
+    assert "## 13. Open questions and follow-ups" in text
+    section = text.split("## 13. Open questions and follow-ups", 1)[-1]
+    assert "#633" in section, "deferred authorization work must name its issue"
+
+
+def test_local_dev_doc_cross_links_the_adr():
+    text = _read(LOCAL_DEV)
+    assert ADR_BASENAME in text, (
+        "docs/webui-local-dev.md must cross-link the console architecture ADR "
+        "(issue #632 scope)"
+    )
+
+
+def test_docs_do_not_embed_secrets():
+    for path in (ADR, LOCAL_DEV):
+        text = _read(path)
+        for marker in ("ghp_", "BEGIN PRIVATE KEY", "Authorization: Bearer"):
+            assert marker not in text, f"{path.name} contains {marker!r}"

tests/test_webui_project_registry.py

@@ -1,4 +1,4 @@
-"""Tests for web UI project registry (#427)."""
+"""Tests for web UI project registry (#427) and its API evolution (#635)."""
 import json
 import sys
 import tempfile
@@ -11,57 +11,246 @@ from starlette.testclient import TestClient
 
 from webui.app import create_app
 from webui.project_registry import (
+    CURRENT_SCHEMA_VERSION,
+    REGISTRY_API_VERSION,
+    SUPPORTED_SCHEMA_VERSIONS,
+    RegistryError,
     default_registry_path,
     load_registry,
+    onboarding_summary,
     project_to_dict,
 )
+from webui.registry_safety import is_forbidden_key
+
+_REPO_ROOT = Path(__file__).resolve().parent.parent
+_API_DOC = _REPO_ROOT / "docs" / "webui-project-registry-api.md"
 
 
-class TestProjectRegistryLoader(unittest.TestCase):
+def _valid_project(**overrides):
+    project = {
+        "id": "example",
+        "repo_name": "Example",
+        "gitea_owner": "Org",
+        "remote_host": "https://gitea.example.invalid",
+        "default_branch": "main",
+        "local_checkout_path": ".",
+        "profiles": {"author": "a", "reviewer": "r", "reconciler": "c"},
+        "workflow_paths": {"skill": "skills/x.md"},
+    }
+    project.update(overrides)
+    return project
+
+
+def _write_registry(payload) -> Path:
+    with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as handle:
+        json.dump(payload, handle)
+        return Path(handle.name)
+
+
+class RegistryFileCase(unittest.TestCase):
+    """Base class that cleans up temporary registry files."""
+
+    def setUp(self):
+        self._temp_paths: list[Path] = []
+
+    def tearDown(self):
+        for path in self._temp_paths:
+            path.unlink(missing_ok=True)
+
+    def write_registry(self, payload) -> Path:
+        path = _write_registry(payload)
+        self._temp_paths.append(path)
+        return path
+
+
+class TestProjectRegistryLoader(RegistryFileCase):
     def test_default_registry_loads_gitea_tools(self):
         registry = load_registry()
-        self.assertEqual(registry.version, 1)
+        self.assertEqual(registry.version, CURRENT_SCHEMA_VERSION)
+        self.assertEqual(registry.schema_version, CURRENT_SCHEMA_VERSION)
+        self.assertEqual(registry.api_version, REGISTRY_API_VERSION)
         self.assertEqual(len(registry.projects), 1)
         project = registry.projects[0]
         self.assertEqual(project.id, "gitea-tools")
         self.assertEqual(project.repo_name, "Gitea-Tools")
         self.assertEqual(project.gitea_owner, "Scaled-Tech-Consulting")
+        self.assertEqual(project.repo_full_name, "Scaled-Tech-Consulting/Gitea-Tools")
         self.assertEqual(project.remote_host, "https://gitea.prgs.cc")
+        self.assertEqual(project.remote_name, "prgs")
+        self.assertEqual(project.status, "active")
         self.assertEqual(project.profiles["author"], "prgs-author")
         self.assertEqual(project.profiles["reviewer"], "prgs-reviewer")
         self.assertEqual(project.profiles["reconciler"], "prgs-reconciler")
         self.assertIn("skill", project.workflow_paths)
         self.assertGreaterEqual(len(project.onboarding_checklist), 4)
 
-    def test_registry_rejects_credential_keys(self):
-        payload = {
+    def test_default_registry_onboarding_summary_is_complete(self):
+        summary = onboarding_summary(load_registry().projects[0])
+        self.assertEqual(summary.total, summary.complete)
+        self.assertEqual(summary.required_outstanding, 0)
+        self.assertTrue(summary.onboarding_complete)
+
+    def test_version_1_registry_still_loads_with_defaults(self):
+        path = self.write_registry({
             "version": 1,
             "projects": [
-                {
-                    "id": "bad",
-                    "repo_name": "Bad",
-                    "gitea_owner": "Org",
-                    "remote_host": "https://gitea.example.invalid",
-                    "default_branch": "main",
-                    "local_checkout_path": ".",
-                    "profiles": {
-                        "author": "a",
-                        "reviewer": "r",
-                        "reconciler": "c",
-                    },
-                    "workflow_paths": {"skill": "skills/x.md"},
-                    "api_token": "secret",
-                }
+                _valid_project(
+                    onboarding_checklist=[
+                        {"id": "step", "title": "Step", "description": "Do it"}
+                    ]
+                )
             ],
+        })
+        registry = load_registry(path)
+        self.assertEqual(registry.schema_version, 1)
+        self.assertIn(1, SUPPORTED_SCHEMA_VERSIONS)
+        project = registry.projects[0]
+        self.assertEqual(project.status, "active")
+        self.assertIsNone(project.remote_name)
+        self.assertIsNone(project.last_seen_health)
+        step = project.onboarding_checklist[0]
+        self.assertEqual(step.state, "pending")
+        self.assertTrue(step.required)
+        self.assertFalse(onboarding_summary(project).onboarding_complete)
+
+    def test_onboarding_summary_counts_states(self):
+        path = self.write_registry({
+            "version": 2,
+            "projects": [
+                _valid_project(
+                    onboarding_checklist=[
+                        {"id": "a", "title": "A", "description": "d", "state": "complete"},
+                        {"id": "b", "title": "B", "description": "d", "state": "blocked"},
+                        {
+                            "id": "c",
+                            "title": "C",
+                            "description": "d",
+                            "state": "pending",
+                            "required": False,
+                        },
+                        {
+                            "id": "d",
+                            "title": "D",
+                            "description": "d",
+                            "state": "not_applicable",
+                        },
+                    ]
+                )
+            ],
+        })
+        summary = onboarding_summary(load_registry(path).projects[0])
+        self.assertEqual(summary.total, 4)
+        self.assertEqual(summary.complete, 1)
+        self.assertEqual(summary.blocked, 1)
+        self.assertEqual(summary.pending, 1)
+        self.assertEqual(summary.not_applicable, 1)
+        # Only the blocked step is both required and outstanding.
+        self.assertEqual(summary.required_outstanding, 1)
+        self.assertFalse(summary.onboarding_complete)
+
+    def test_last_seen_health_is_parsed_when_present(self):
+        path = self.write_registry({
+            "version": 2,
+            "projects": [
+                _valid_project(
+                    last_seen_health={
+                        "status": "degraded",
+                        "checked_at": "2026-01-01T00:00:00Z",
+                        "detail": "daemon restart pending",
                     }
-        with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as handle:
-            json.dump(payload, handle)
-            path = Path(handle.name)
-        try:
-            with self.assertRaises(ValueError):
+                )
+            ],
+        })
+        health = load_registry(path).projects[0].last_seen_health
+        self.assertIsNotNone(health)
+        self.assertEqual(health.status, "degraded")
+        self.assertEqual(health.checked_at, "2026-01-01T00:00:00Z")
+
+    def test_registry_rejects_credential_keys(self):
+        path = self.write_registry({
+            "version": 1,
+            "projects": [_valid_project(id="bad", api_token="redacted-placeholder")],
+        })
+        with self.assertRaises(RegistryError) as ctx:
             load_registry(path)
-        finally:
-            path.unlink(missing_ok=True)
+        self.assertIn("credential", ctx.exception.remediation.lower())
+        self.assertEqual(ctx.exception.field_path, "projects[0].api_token")
+
+    def test_unsupported_version_fails_closed_with_remediation(self):
+        path = self.write_registry({"version": 99, "projects": [_valid_project()]})
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertIn("unsupported registry version", ctx.exception.message)
+        self.assertIn(str(CURRENT_SCHEMA_VERSION), ctx.exception.remediation)
+        self.assertEqual(ctx.exception.field_path, "version")
+
+    def test_missing_required_field_fails_closed(self):
+        broken = _valid_project()
+        del broken["default_branch"]
+        path = self.write_registry({"version": 2, "projects": [broken]})
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertIn("default_branch", ctx.exception.message)
+        self.assertEqual(ctx.exception.field_path, "projects[0]")
+
+    def test_unknown_status_fails_closed(self):
+        path = self.write_registry({
+            "version": 2,
+            "projects": [_valid_project(status="mystery")],
+        })
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertEqual(ctx.exception.field_path, "projects[0].status")
+        self.assertIn("active", ctx.exception.remediation)
+
+    def test_unknown_onboarding_state_fails_closed(self):
+        path = self.write_registry({
+            "version": 2,
+            "projects": [
+                _valid_project(
+                    onboarding_checklist=[
+                        {"id": "a", "title": "A", "description": "d", "state": "almost"}
+                    ]
+                )
+            ],
+        })
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertEqual(
+            ctx.exception.field_path,
+            "projects[0].onboarding_checklist[0].state",
+        )
+
+    def test_missing_profile_role_fails_closed(self):
+        path = self.write_registry({
+            "version": 2,
+            "projects": [_valid_project(profiles={"author": "a", "reviewer": "r"})],
+        })
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertEqual(ctx.exception.field_path, "projects[0].profiles.reconciler")
+
+    def test_empty_projects_fails_closed(self):
+        path = self.write_registry({"version": 2, "projects": []})
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertEqual(ctx.exception.field_path, "projects")
+
+    def test_invalid_json_fails_closed_with_location(self):
+        with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as handle:
+            handle.write("{not json")
+            path = Path(handle.name)
+        self._temp_paths.append(path)
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(path)
+        self.assertIn("not valid JSON", ctx.exception.message)
+        self.assertIn("line", ctx.exception.remediation)
+
+    def test_missing_file_fails_closed(self):
+        missing = Path(tempfile.gettempdir()) / "webui-registry-does-not-exist.json"
+        with self.assertRaises(RegistryError) as ctx:
+            load_registry(missing)
+        self.assertIn("could not be read", ctx.exception.message)
 
     def test_default_registry_path_points_at_packaged_data(self):
         path = default_registry_path()
@@ -81,30 +270,146 @@ class TestProjectRegistryRoutes(unittest.TestCase):
         self.assertIn("prgs-author", response.text)
         self.assertNotIn("child issue", response.text.lower())
 
+    def test_projects_page_shows_status_and_progress(self):
+        response = self.client.get("/projects")
+        self.assertIn("Status", response.text)
+        self.assertIn("Onboarding", response.text)
+        self.assertIn("4/4 complete", response.text)
+
     def test_project_detail_renders_checklist(self):
         response = self.client.get("/projects/gitea-tools")
         self.assertEqual(response.status_code, 200)
         self.assertIn("Onboarding checklist", response.text)
         self.assertIn("Configure execution profiles", response.text)
         self.assertIn("branches/", response.text)
+        self.assertIn("Complete", response.text)
+        self.assertIn("required outstanding 0", response.text)
 
     def test_project_detail_404(self):
         response = self.client.get("/projects/unknown-repo")
         self.assertEqual(response.status_code, 404)
 
-    def test_api_projects_json(self):
+    def test_api_projects_alias_stays_compatible(self):
         response = self.client.get("/api/projects")
         self.assertEqual(response.status_code, 200)
         data = response.json()
-        self.assertEqual(data["version"], 1)
+        # #427 consumers keep these keys.
+        self.assertEqual(data["version"], CURRENT_SCHEMA_VERSION)
+        self.assertIn("source_path", data)
         self.assertEqual(len(data["projects"]), 1)
         self.assertEqual(data["projects"][0]["id"], "gitea-tools")
         self.assertIn("onboarding_checklist", data["projects"][0])
 
+    def test_api_v1_projects_payload(self):
+        response = self.client.get("/api/v1/projects")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["api_version"], REGISTRY_API_VERSION)
+        self.assertEqual(data["schema_version"], CURRENT_SCHEMA_VERSION)
+        self.assertEqual(data["project_count"], 1)
+        self.assertEqual(data["source"]["kind"], "file")
+        self.assertTrue(data["source"]["inventory_complete"])
+        project = data["projects"][0]
+        self.assertEqual(project["status"], "active")
+        self.assertEqual(project["remote_name"], "prgs")
+        self.assertEqual(
+            project["repo_full_name"], "Scaled-Tech-Consulting/Gitea-Tools"
+        )
+        self.assertTrue(project["onboarding_summary"]["onboarding_complete"])
+        self.assertEqual(project["onboarding_checklist"][0]["state"], "complete")
+        self.assertIsNone(project["last_seen_health"])
+
+    def test_api_v1_project_detail(self):
+        response = self.client.get("/api/v1/projects/gitea-tools")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["api_version"], REGISTRY_API_VERSION)
+        self.assertEqual(data["project"]["id"], "gitea-tools")
+        self.assertEqual(data["source"]["kind"], "file")
+
+    def test_api_v1_project_detail_missing_fails_closed(self):
+        response = self.client.get("/api/v1/projects/not-registered")
+        self.assertEqual(response.status_code, 404)
+        data = response.json()
+        self.assertEqual(data["error"], "project_not_found")
+        self.assertEqual(data["project_id"], "not-registered")
+        self.assertIn("gitea-tools", data["known_project_ids"])
+        self.assertIn("remediation", data)
+
+    def test_api_v1_projects_is_read_only(self):
+        response = self.client.post("/api/v1/projects", json={})
+        self.assertEqual(response.status_code, 405)
+        self.assertEqual(response.json()["error"], "read-only-mvp")
+
     def test_project_to_dict_is_json_safe(self):
         registry = load_registry()
-        encoded = json.dumps(project_to_dict(registry.projects[0]))
+        dto = project_to_dict(registry.projects[0])
+        encoded = json.dumps(dto)
         self.assertIn("gitea-tools", encoded)
+        # Prose may mention tokens; no serialized *key* may look like a secret.
+        for key in dto:
+            with self.subTest(key=key):
+                self.assertFalse(is_forbidden_key(key))
+
+
+class TestInvalidRegistryFailsClosedOverHttp(RegistryFileCase):
+    def setUp(self):
+        super().setUp()
+        self.path = self.write_registry({"version": 42, "projects": []})
+        self.client = TestClient(create_app())
+
+    def _with_bad_registry(self, url: str):
+        import os
+        from unittest import mock
+
+        with mock.patch.dict(
+            os.environ, {"WEBUI_PROJECT_REGISTRY": str(self.path)}, clear=False
+        ):
+            return self.client.get(url)
+
+    def test_api_v1_reports_actionable_error(self):
+        response = self._with_bad_registry("/api/v1/projects")
+        self.assertEqual(response.status_code, 500)
+        data = response.json()
+        self.assertEqual(data["error"], "registry_invalid")
+        self.assertIn("unsupported registry version", data["detail"])
+        self.assertTrue(data["remediation"])
+        self.assertEqual(data["field_path"], "version")
+
+    def test_unversioned_alias_reports_actionable_error(self):
+        response = self._with_bad_registry("/api/projects")
+        self.assertEqual(response.status_code, 500)
+        self.assertEqual(response.json()["error"], "registry_invalid")
+
+    def test_html_page_reports_actionable_error(self):
+        response = self._with_bad_registry("/projects")
+        self.assertEqual(response.status_code, 500)
+        self.assertIn("Project registry unavailable", response.text)
+        self.assertIn("Remediation", response.text)
+
+
+class TestProjectRegistryApiDocs(unittest.TestCase):
+    def test_api_contract_is_documented(self):
+        self.assertTrue(_API_DOC.is_file(), f"missing {_API_DOC}")
+        text = _API_DOC.read_text(encoding="utf-8")
+        for token in (
+            "/api/v1/projects",
+            "/api/v1/projects/{project_id}",
+            "/api/projects",
+            "onboarding_summary",
+            "last_seen_health",
+            "registry_invalid",
+            "#635",
+        ):
+            with self.subTest(token=token):
+                self.assertIn(token, text)
+
+    def test_route_table_lists_versioned_routes(self):
+        local_dev = (_REPO_ROOT / "docs" / "webui-local-dev.md").read_text(
+            encoding="utf-8"
+        )
+        self.assertIn("/api/v1/projects", local_dev)
+        self.assertIn("webui-project-registry-api.md", local_dev)
 
 
 if __name__ == "__main__":

tests/test_webui_worker_registry.py

@@ -0,0 +1,458 @@
+"""Tests for the worker registry and configuration schema (#798, epic #797)."""
+import json
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from webui.worker_registry import (
+    ALLOWED_ROLES,
+    SCHEMA_VERSION,
+    RegistryValidationError,
+    WorkerRegistry,
+    default_registry_path,
+    find_provider,
+    find_worker,
+    history_dir,
+    list_revisions,
+    load_registry,
+    registry_to_dict,
+    registry_to_document,
+    rollback_to_revision,
+    save_registry,
+    validate_payload,
+    worker_to_dict,
+    workers_for_provider,
+)
+
+_EXPECTED_PROVIDER_IDS = ("claude", "grok", "codex", "agy", "kimi-k")
+
+
+def _provider(provider_id: str = "claude", **overrides) -> dict:
+    payload = {
+        "id": provider_id,
+        "display_name": "Claude",
+        "vendor": "Anthropic",
+        "executable": "claude",
+        "available": True,
+        "models": ["claude-opus-4-8"],
+        "notes": "",
+    }
+    payload.update(overrides)
+    return payload
+
+
+def _worker(worker_id: str = "claude-author", **overrides) -> dict:
+    payload = {
+        "id": worker_id,
+        "display_name": "Claude author",
+        "provider": "claude",
+        "model": "claude-opus-4-8",
+        "project": "gitea-tools",
+        "role": "author",
+        "namespace": "gitea-author",
+        "profile": "prgs-author",
+        "workflow": "skills/llm-project-workflow/workflows/work-issue.md",
+        "schedule": {"kind": "cron", "expression": "0 * * * *"},
+        "timeout_seconds": 3600,
+        "enabled": True,
+        "scheduler": {"kind": "launchd", "label": "cc.prgs.claude.author"},
+        "notes": "",
+    }
+    payload.update(overrides)
+    return payload
+
+
+def _document(providers=None, workers=None, **overrides) -> dict:
+    payload = {
+        "version": SCHEMA_VERSION,
+        "revision": 1,
+        "updated_at": "2026-07-22T00:00:00Z",
+        "providers": providers if providers is not None else [_provider()],
+        "workers": workers if workers is not None else [_worker()],
+    }
+    payload.update(overrides)
+    return payload
+
+
+class _TempRegistryCase(unittest.TestCase):
+    """Base case giving each test an isolated registry file."""
+
+    def setUp(self):
+        self._tmp = tempfile.TemporaryDirectory()
+        self.addCleanup(self._tmp.cleanup)
+        self.path = Path(self._tmp.name) / "workers.registry.json"
+
+    def write(self, document: dict) -> Path:
+        self.path.write_text(json.dumps(document, indent=2) + "\n", encoding="utf-8")
+        return self.path
+
+    def parse(self, document: dict) -> WorkerRegistry:
+        return validate_payload(document, source_path=self.path)
+
+
+class TestPackagedRegistry(unittest.TestCase):
+    """AC: the declarative registry is the source of truth and ships with the app."""
+
+    def test_default_path_points_at_packaged_data(self):
+        path = default_registry_path()
+        self.assertEqual(path.name, "workers.registry.json")
+        self.assertEqual(path.parent.name, "data")
+
+    def test_packaged_registry_loads_and_validates(self):
+        registry = load_registry()
+        self.assertEqual(registry.version, SCHEMA_VERSION)
+        self.assertGreaterEqual(registry.revision, 1)
+
+    def test_packaged_registry_declares_all_five_providers(self):
+        registry = load_registry()
+        self.assertEqual(
+            tuple(provider.id for provider in registry.providers),
+            _EXPECTED_PROVIDER_IDS,
+        )
+
+    def test_packaged_registry_carries_no_credentials(self):
+        raw = default_registry_path().read_text(encoding="utf-8").lower()
+        for marker in ("token", "password", "secret", "api_key", "credential"):
+            self.assertNotIn(marker, raw)
+
+
+class TestSeparateEntities(_TempRegistryCase):
+    """AC: providers and configured workers are separate entities."""
+
+    def test_provider_may_exist_with_no_workers(self):
+        registry = self.parse(
+            _document(providers=[_provider("grok", display_name="Grok")], workers=[])
+        )
+        self.assertEqual(len(registry.providers), 1)
+        self.assertEqual(registry.workers, ())
+        self.assertEqual(workers_for_provider(registry, "grok"), ())
+
+    def test_many_workers_may_share_one_provider(self):
+        registry = self.parse(
+            _document(
+                workers=[
+                    _worker("claude-author"),
+                    _worker(
+                        "claude-reviewer",
+                        role="reviewer",
+                        namespace="gitea-reviewer",
+                        profile="prgs-reviewer",
+                        scheduler={"kind": "launchd", "label": "cc.prgs.claude.reviewer"},
+                    ),
+                ]
+            )
+        )
+        self.assertEqual(len(workers_for_provider(registry, "claude")), 2)
+        self.assertEqual(len(registry.providers), 1)
+
+    def test_worker_referencing_unknown_provider_is_refused(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[_worker(provider="mystery")]))
+        self.assertIn("unknown provider", str(ctx.exception))
+
+    def test_lookup_helpers(self):
+        registry = self.parse(_document())
+        self.assertIsNotNone(find_worker(registry, "claude-author"))
+        self.assertIsNone(find_worker(registry, "absent"))
+        self.assertIsNotNone(find_provider(registry, "claude"))
+        self.assertIsNone(find_provider(registry, "absent"))
+
+
+class TestRecordedFields(_TempRegistryCase):
+    """AC: records provider, model, project, role, namespace/profile, workflow,
+    schedule, timeout, enabled state, and scheduler metadata."""
+
+    def test_every_required_field_is_recorded(self):
+        registry = self.parse(_document())
+        worker = registry.workers[0]
+        self.assertEqual(worker.provider, "claude")
+        self.assertEqual(worker.model, "claude-opus-4-8")
+        self.assertEqual(worker.project, "gitea-tools")
+        self.assertEqual(worker.role, "author")
+        self.assertEqual(worker.namespace, "gitea-author")
+        self.assertEqual(worker.profile, "prgs-author")
+        self.assertEqual(worker.workflow, "skills/llm-project-workflow/workflows/work-issue.md")
+        self.assertEqual(worker.schedule.kind, "cron")
+        self.assertEqual(worker.schedule.expression, "0 * * * *")
+        self.assertEqual(worker.timeout_seconds, 3600)
+        self.assertTrue(worker.enabled)
+        self.assertEqual(worker.scheduler.kind, "launchd")
+        self.assertEqual(worker.scheduler.label, "cc.prgs.claude.author")
+
+    def test_each_required_field_is_individually_required(self):
+        for field in (
+            "provider", "model", "project", "role", "namespace",
+            "profile", "workflow", "schedule", "timeout_seconds",
+            "enabled", "scheduler", "id", "display_name",
+        ):
+            with self.subTest(field=field):
+                worker = _worker()
+                worker.pop(field)
+                with self.assertRaises(RegistryValidationError):
+                    self.parse(_document(workers=[worker]))
+
+    def test_all_sanctioned_roles_are_accepted(self):
+        for role in ALLOWED_ROLES:
+            with self.subTest(role=role):
+                registry = self.parse(_document(workers=[_worker(role=role)]))
+                self.assertEqual(registry.workers[0].role, role)
+
+    def test_unsanctioned_role_is_refused(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[_worker(role="admin")]))
+        self.assertIn("role must be one of", str(ctx.exception))
+
+    def test_worker_dict_round_trips_every_field(self):
+        registry = self.parse(_document())
+        encoded = worker_to_dict(registry.workers[0])
+        self.assertEqual(encoded, _worker())
+        json.dumps(encoded)  # must stay JSON-safe for the #799 API
+
+
+class TestSchemaValidation(_TempRegistryCase):
+    """AC: supports schema validation — and fails closed."""
+
+    def test_unsupported_version_is_refused(self):
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(version=2))
+
+    def test_root_must_be_an_object(self):
+        with self.assertRaises(RegistryValidationError):
+            validate_payload([], source_path=self.path)
+
+    def test_providers_must_be_non_empty(self):
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(providers=[]))
+
+    def test_unknown_top_level_field_is_refused(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(fleet=[]))
+        self.assertIn("unknown fields", str(ctx.exception))
+
+    def test_unknown_worker_field_is_refused_not_ignored(self):
+        # A typo'd field must not be silently dropped: "timeout_second" would
+        # otherwise read as "no timeout declared".
+        worker = _worker()
+        worker["timeout_second"] = 30
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[worker]))
+        self.assertIn("timeout_second", str(ctx.exception))
+
+    def test_credentials_are_refused_anywhere_in_the_document(self):
+        for label, mutate in (
+            ("provider.api_token", lambda doc: doc["providers"][0].__setitem__("api_token", "x")),
+            ("worker.password", lambda doc: doc["workers"][0].__setitem__("password", "x")),
+            ("root.secret", lambda doc: doc.__setitem__("secret", "x")),
+        ):
+            with self.subTest(field=label):
+                document = _document()
+                mutate(document)
+                with self.assertRaises(ValueError) as ctx:
+                    self.parse(document)
+                self.assertIn("credential", str(ctx.exception).lower())
+
+    def test_duplicate_worker_id_is_refused(self):
+        workers = [_worker("dup"), _worker("dup", scheduler={"kind": "manual"})]
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=workers))
+        self.assertIn("duplicate worker id", str(ctx.exception))
+
+    def test_duplicate_provider_id_is_refused(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(providers=[_provider("claude"), _provider("claude")], workers=[]))
+        self.assertIn("duplicate provider id", str(ctx.exception))
+
+    def test_duplicate_launchagent_label_is_refused(self):
+        # Two workers sharing a label would silently overwrite each other's agent.
+        workers = [
+            _worker("a", scheduler={"kind": "launchd", "label": "cc.prgs.same"}),
+            _worker("b", scheduler={"kind": "launchd", "label": "cc.prgs.same"}),
+        ]
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=workers))
+        self.assertIn("duplicate scheduler label", str(ctx.exception))
+
+    def test_manual_scheduler_needs_no_label_and_many_may_coexist(self):
+        workers = [
+            _worker("a", scheduler={"kind": "manual"}),
+            _worker("b", scheduler={"kind": "manual"}),
+        ]
+        registry = self.parse(_document(workers=workers))
+        self.assertEqual([w.scheduler.label for w in registry.workers], [None, None])
+
+    def test_launchd_scheduler_requires_a_label(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[_worker(scheduler={"kind": "launchd"})]))
+        self.assertIn("label is required", str(ctx.exception))
+
+    def test_unknown_scheduler_kind_is_refused(self):
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(workers=[_worker(scheduler={"kind": "systemd", "label": "x"})]))
+
+    def test_timeout_must_be_a_positive_bounded_integer(self):
+        for bad in (0, -1, "3600", 1.5, True, 86_401):
+            with self.subTest(timeout=bad):
+                with self.assertRaises(RegistryValidationError):
+                    self.parse(_document(workers=[_worker(timeout_seconds=bad)]))
+
+    def test_enabled_must_be_a_real_boolean(self):
+        for bad in ("true", 1, None):
+            with self.subTest(enabled=bad):
+                with self.assertRaises(RegistryValidationError):
+                    self.parse(_document(workers=[_worker(enabled=bad)]))
+
+    def test_identifier_shape_is_enforced(self):
+        for bad in ("Claude Author", "-leading", "UPPER", ""):
+            with self.subTest(worker_id=bad):
+                with self.assertRaises(RegistryValidationError):
+                    self.parse(_document(workers=[_worker(bad)]))
+
+
+class TestScheduleValidation(_TempRegistryCase):
+    """Schedules are declarations; next-run computation belongs to #803."""
+
+    def test_interval_schedule_requires_positive_seconds(self):
+        registry = self.parse(
+            _document(workers=[_worker(schedule={"kind": "interval", "seconds": 900})])
+        )
+        self.assertEqual(registry.workers[0].schedule.seconds, 900)
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(workers=[_worker(schedule={"kind": "interval"})]))
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(workers=[_worker(schedule={"kind": "interval", "seconds": 0})]))
+
+    def test_cron_schedule_requires_five_fields(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[_worker(schedule={"kind": "cron", "expression": "0 *"})]))
+        self.assertIn("five crontab fields", str(ctx.exception))
+
+    def test_manual_schedule_needs_no_timing(self):
+        registry = self.parse(_document(workers=[_worker(schedule={"kind": "manual"})]))
+        schedule = registry.workers[0].schedule
+        self.assertEqual(schedule.kind, "manual")
+        self.assertIsNone(schedule.seconds)
+        self.assertIsNone(schedule.expression)
+
+    def test_fields_from_the_wrong_kind_are_refused(self):
+        with self.assertRaises(RegistryValidationError) as ctx:
+            self.parse(_document(workers=[_worker(schedule={"kind": "manual", "seconds": 60})]))
+        self.assertIn("not valid for kind", str(ctx.exception))
+
+    def test_unknown_schedule_kind_is_refused(self):
+        with self.assertRaises(RegistryValidationError):
+            self.parse(_document(workers=[_worker(schedule={"kind": "hourly"})]))
+
+
+class TestAtomicPersistence(_TempRegistryCase):
+    """AC: atomic persistence."""
+
+    def test_save_then_load_round_trips(self):
+        registry = self.parse(_document())
+        save_registry(registry, self.path)
+        reloaded = load_registry(self.path)
+        self.assertEqual(
+            [worker_to_dict(w) for w in reloaded.workers],
+            [worker_to_dict(w) for w in registry.workers],
+        )
+
+    def test_save_leaves_no_temp_files_behind(self):
+        registry = self.parse(_document())
+        save_registry(registry, self.path)
+        save_registry(registry, self.path)
+        leftovers = [p.name for p in self.path.parent.iterdir() if p.name.startswith(".")]
+        self.assertEqual(leftovers, [])
+
+    def test_save_refuses_to_persist_an_invalid_document(self):
+        registry = self.parse(_document())
+        broken = WorkerRegistry(
+            version=registry.version,
+            revision=registry.revision,
+            updated_at=registry.updated_at,
+            providers=registry.providers,
+            # A worker whose provider is not declared in the registry.
+            workers=tuple(
+                type(worker)(**{**worker.__dict__, "provider": "vanished"})
+                for worker in registry.workers
+            ),
+            source_path=self.path,
+        )
+        with self.assertRaises(RegistryValidationError):
+            save_registry(broken, self.path)
+        self.assertFalse(self.path.exists(), "invalid save must not create the file")
+
+    def test_document_shape_excludes_local_paths_but_api_shape_includes_it(self):
+        registry = self.parse(_document())
+        self.assertNotIn("source_path", registry_to_document(registry))
+        self.assertEqual(registry_to_dict(registry)["source_path"], str(self.path))
+
+
+class TestVersioningAndRollback(_TempRegistryCase):
+    """AC: versioning and rollback."""
+
+    def _seed(self) -> WorkerRegistry:
+        self.write(_document())
+        return load_registry(self.path)
+
+    def test_revision_increments_on_each_save(self):
+        registry = self._seed()
+        self.assertEqual(registry.revision, 1)
+        second = save_registry(registry, self.path)
+        self.assertEqual(second.revision, 2)
+        third = save_registry(second, self.path)
+        self.assertEqual(third.revision, 3)
+
+    def test_updated_at_is_refreshed_and_utc(self):
+        registry = self._seed()
+        saved = save_registry(registry, self.path)
+        self.assertRegex(saved.updated_at, r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z$")
+
+    def test_superseded_revisions_are_retained(self):
+        registry = self._seed()
+        second = save_registry(registry, self.path)
+        save_registry(second, self.path)
+        self.assertEqual(list_revisions(self.path), (1, 2))
+        self.assertTrue(history_dir(self.path).is_dir())
+
+    def test_rollback_restores_prior_content_as_a_new_revision(self):
+        self.write(_document(workers=[_worker("original")]))
+        registry = load_registry(self.path)
+
+        changed = WorkerRegistry(
+            version=registry.version,
+            revision=registry.revision,
+            updated_at=registry.updated_at,
+            providers=registry.providers,
+            workers=(),  # operator deletes every worker
+            source_path=self.path,
+        )
+        save_registry(changed, self.path)
+        self.assertEqual(load_registry(self.path).workers, ())
+
+        restored = rollback_to_revision(1, self.path)
+        self.assertEqual([w.id for w in restored.workers], ["original"])
+        # Append-only: the rollback publishes a new head rather than rewinding.
+        self.assertGreater(restored.revision, 2)
+        self.assertEqual([w.id for w in load_registry(self.path).workers], ["original"])
+
+    def test_rollback_to_unknown_revision_fails_closed(self):
+        self._seed()
+        with self.assertRaises(RegistryValidationError) as ctx:
+            rollback_to_revision(99, self.path)
+        self.assertIn("not retained", str(ctx.exception))
+
+    def test_revision_must_be_a_positive_integer(self):
+        for bad in (0, -1, "1", None):
+            with self.subTest(revision=bad):
+                with self.assertRaises(RegistryValidationError):
+                    self.parse(_document(revision=bad))
+
+    def test_history_is_empty_before_any_save(self):
+        self.write(_document())
+        self.assertEqual(list_revisions(self.path), ())
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/app.py

@@ -11,8 +11,20 @@ from starlette.routing import Route
 
 from webui.deployment_boundary import deployment_snapshot
 from webui.layout import render_page
-from webui.project_registry import find_project, load_registry, registry_to_dict
-from webui.project_views import render_project_detail, render_projects_list
+from webui.project_registry import (
+    ProjectRegistry,
+    RegistryError,
+    find_project,
+    known_project_ids,
+    load_registry,
+    project_detail_to_dict,
+    registry_to_dict,
+)
+from webui.project_views import (
+    render_project_detail,
+    render_projects_list,
+    render_registry_error,
+)
 from webui.prompt_library import find_prompt, library_to_dict
 from webui.prompt_views import render_prompt_detail, render_prompts_page
 from final_report_validator import FINAL_REPORT_TASK_KINDS
@@ -81,14 +93,26 @@ async def api_queue(_request: Request) -> JSONResponse:
     return JSONResponse(queue_snapshot_to_dict(load_queue_snapshot()))
 
 
+def _load_project_registry() -> tuple[ProjectRegistry | None, RegistryError | None]:
+    """Load the registry, converting validation failure into a fail-closed pair."""
+    try:
+        return load_registry(), None
+    except RegistryError as exc:
+        return None, exc
+
+
 async def projects(_request: Request) -> HTMLResponse:
-    registry = load_registry()
+    registry, error = _load_project_registry()
+    if error is not None:
+        return HTMLResponse(render_registry_error(error), status_code=500)
     return HTMLResponse(render_projects_list(registry))
 
 
 async def project_detail(request: Request) -> HTMLResponse:
     project_id = request.path_params["project_id"]
-    registry = load_registry()
+    registry, error = _load_project_registry()
+    if error is not None:
+        return HTMLResponse(render_registry_error(error), status_code=500)
     project = find_project(registry, project_id)
     if project is None:
         return HTMLResponse(
@@ -106,10 +130,47 @@ async def project_detail(request: Request) -> HTMLResponse:
 
 
 async def api_projects(_request: Request) -> JSONResponse:
-    registry = load_registry()
+    """Unversioned MVP alias, retained through Phase 1 (#632 section 6)."""
+    registry, error = _load_project_registry()
+    if error is not None:
+        return JSONResponse(error.to_dict(), status_code=500)
     return JSONResponse(registry_to_dict(registry))
 
 
+async def api_v1_projects(_request: Request) -> JSONResponse:
+    registry, error = _load_project_registry()
+    if error is not None:
+        return JSONResponse(error.to_dict(), status_code=500)
+    return JSONResponse(registry_to_dict(registry))
+
+
+async def api_v1_project_detail(request: Request) -> JSONResponse:
+    project_id = request.path_params["project_id"]
+    registry, error = _load_project_registry()
+    if error is not None:
+        return JSONResponse(error.to_dict(), status_code=500)
+    project = find_project(registry, project_id)
+    if project is None:
+        return JSONResponse(
+            {
+                "error": "project_not_found",
+                "project_id": project_id,
+                "known_project_ids": known_project_ids(registry),
+                "remediation": (
+                    "Request one of the known project ids, or add the project to the "
+                    "registry file named in 'source'."
+                ),
+                "source": {
+                    "kind": "file",
+                    "path": str(registry.source_path),
+                    "inventory_complete": True,
+                },
+            },
+            status_code=404,
+        )
+    return JSONResponse(project_detail_to_dict(registry, project))
+
+
 async def prompts(_request: Request) -> HTMLResponse:
     return HTMLResponse(render_prompts_page())
 
@@ -268,6 +329,12 @@ def create_app(*, bind_host: str | None = None) -> Starlette:
             Route("/projects", projects, methods=["GET"]),
             Route("/projects/{project_id}", project_detail, methods=["GET"]),
             Route("/api/projects", api_projects, methods=["GET"]),
+            Route("/api/v1/projects", api_v1_projects, methods=["GET"]),
+            Route(
+                "/api/v1/projects/{project_id}",
+                api_v1_project_detail,
+                methods=["GET"],
+            ),
             Route("/prompts", prompts, methods=["GET"]),
             Route("/prompts/{prompt_id}", prompt_detail, methods=["GET"]),
             Route("/api/prompts", api_prompts, methods=["GET"]),

webui/data/projects.registry.json

@@ -1,13 +1,15 @@
 {
-  "version": 1,
+  "version": 2,
   "projects": [
     {
       "id": "gitea-tools",
       "repo_name": "Gitea-Tools",
       "gitea_owner": "Scaled-Tech-Consulting",
+      "remote_name": "prgs",
       "remote_host": "https://gitea.prgs.cc",
       "default_branch": "master",
       "local_checkout_path": ".",
+      "status": "active",
       "profiles": {
         "author": "prgs-author",
         "reviewer": "prgs-reviewer",
@@ -26,22 +28,30 @@
         {
           "id": "profiles",
           "title": "Configure execution profiles",
-          "description": "Install author, reviewer, and reconciler MCP profiles (prgs-author, prgs-reviewer, prgs-reconciler) in separate namespaces. Tokens stay in keychain — never in this registry."
+          "description": "Install author, reviewer, and reconciler MCP profiles (prgs-author, prgs-reviewer, prgs-reconciler) in separate namespaces. Tokens stay in keychain — never in this registry.",
+          "state": "complete",
+          "required": true
         },
         {
           "id": "mcp_config",
           "title": "Wire MCP v2 contexts",
-          "description": "Copy and customize gitea-mcp.v2-contexts.example.json for your machine. Map this repo path under projects with default_owner Scaled-Tech-Consulting and default_repo Gitea-Tools."
+          "description": "Copy and customize gitea-mcp.v2-contexts.example.json for your machine. Map this repo path under projects with default_owner Scaled-Tech-Consulting and default_repo Gitea-Tools.",
+          "state": "complete",
+          "required": true
         },
         {
           "id": "wiki_gate",
           "title": "Wiki publication readiness",
-          "description": "For wiki-tracked work, satisfy the live Gitea Wiki proof gate (#224) before closing issues. See docs/wiki/Safety-and-Gates.md."
+          "description": "For wiki-tracked work, satisfy the live Gitea Wiki proof gate (#224) before closing issues. See docs/wiki/Safety-and-Gates.md.",
+          "state": "complete",
+          "required": true
         },
         {
           "id": "branches_layout",
           "title": "Isolate work under branches/",
-          "description": "All LLM task edits happen in worktrees under branches/. Main checkout stays clean; use skills/llm-project-workflow templates for start-issue and review flows."
+          "description": "All LLM task edits happen in worktrees under branches/. Main checkout stays clean; use skills/llm-project-workflow templates for start-issue and review flows.",
+          "state": "complete",
+          "required": true
         }
       ]
     }

webui/data/workers.registry.json

@@ -0,0 +1,57 @@
+{
+  "version": 1,
+  "revision": 1,
+  "updated_at": "2026-07-22T00:00:00Z",
+  "providers": [
+    {
+      "id": "claude",
+      "display_name": "Claude",
+      "vendor": "Anthropic",
+      "executable": "claude",
+      "available": true,
+      "models": [
+        "claude-opus-4-8",
+        "claude-sonnet-5",
+        "claude-haiku-4-5-20251001"
+      ],
+      "notes": "Model list is a declaration. Live enumeration and version inspection belong to the provider adapter framework (#800)."
+    },
+    {
+      "id": "grok",
+      "display_name": "Grok",
+      "vendor": "xAI",
+      "executable": "grok",
+      "available": true,
+      "models": [],
+      "notes": "Models enumerated by the provider adapter (#800); not declared here."
+    },
+    {
+      "id": "codex",
+      "display_name": "Codex",
+      "vendor": "OpenAI",
+      "executable": "codex",
+      "available": true,
+      "models": [],
+      "notes": "Models enumerated by the provider adapter (#800); not declared here."
+    },
+    {
+      "id": "agy",
+      "display_name": "AGY",
+      "vendor": "Antigravity",
+      "executable": "agy",
+      "available": true,
+      "models": [],
+      "notes": "MCP allowlist gating applies to this provider; confirm server-side allowlist before configuring a worker."
+    },
+    {
+      "id": "kimi-k",
+      "display_name": "Kimi K",
+      "vendor": "Moonshot AI",
+      "executable": "kimi",
+      "available": true,
+      "models": [],
+      "notes": "Provider id is kimi-k; the executable on PATH is kimi. Models enumerated by the provider adapter (#800)."
+    }
+  ],
+  "workers": []
+}

webui/project_registry.py

@@ -1,4 +1,16 @@
-"""Load and validate the web UI project registry (#427)."""
+"""Load and validate the web UI project registry (#427, evolved for #635).
+
+Phase 1 of the console architecture ADR keeps this loader read-only. It owns
+the versioned project registry contract served at ``/api/v1/projects``:
+
+* the on-disk file carries a ``version`` (schema version 1 or 2);
+* version 1 files stay loadable and are normalized with explicit defaults, so
+  an operator registry written for #427 keeps working;
+* every validation failure raises :class:`RegistryError`, which carries an
+  actionable ``remediation`` string instead of leaking a traceback;
+* serialization never emits credentials — credential-shaped keys are rejected
+  at load time, before any DTO is built.
+"""
 
 from __future__ import annotations
 
@@ -8,27 +20,59 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Any
 
-_FORBIDDEN_EXACT_KEYS = frozenset({
-    "token",
-    "password",
-    "secret",
-    "credential",
-    "auth",
-    "api_key",
-    "api-key",
-})
-_FORBIDDEN_KEY_PREFIXES = ("auth_", "api_key_", "api-key_")
-_FORBIDDEN_KEY_SUFFIXES = ("_token", "_secret", "_password", "_credential", "_auth")
+from webui.registry_safety import is_forbidden_key
 
+#: Version of the JSON contract served under ``/api/v1/...``.
+REGISTRY_API_VERSION = "v1"
+
+#: Schema version written by this repository's packaged registry.
+CURRENT_SCHEMA_VERSION = 2
+
+#: Schema versions this loader accepts. Version 1 is normalized on load.
+SUPPORTED_SCHEMA_VERSIONS = (1, 2)
+
+#: Lifecycle state of a registered project.
+PROJECT_STATUSES = ("active", "onboarding", "paused", "archived")
+_DEFAULT_PROJECT_STATUS = "active"
+
+#: Completion state of a single onboarding step.
+ONBOARDING_STATES = ("complete", "pending", "blocked", "not_applicable")
+_DEFAULT_ONBOARDING_STATE = "pending"
+
+#: Redacted, last-seen health of a project's control plane.
+HEALTH_STATUSES = ("healthy", "degraded", "unreachable", "unknown")
+
+class RegistryError(ValueError):
+    """A registry file could not be loaded or failed validation.
+
+    Carries an operator-facing ``remediation`` so routes can fail closed with
+    an actionable message rather than a stack trace.
+    """
+
+    def __init__(
+        self,
+        message: str,
+        *,
+        remediation: str,
+        source_path: Path | None = None,
+        field_path: str | None = None,
+    ) -> None:
+        super().__init__(message)
+        self.message = message
+        self.remediation = remediation
+        self.source_path = source_path
+        self.field_path = field_path
+
+    def to_dict(self) -> dict[str, Any]:
+        """Serialize for a fail-closed JSON error response."""
+        return {
+            "error": "registry_invalid",
+            "detail": self.message,
+            "remediation": self.remediation,
+            "field_path": self.field_path,
+            "source_path": str(self.source_path) if self.source_path else None,
+        }
 
-def _is_forbidden_key(key: str) -> bool:
-    lowered = key.lower()
-    if lowered in _FORBIDDEN_EXACT_KEYS:
-        return True
-    return (
-        lowered.startswith(_FORBIDDEN_KEY_PREFIXES)
-        or lowered.endswith(_FORBIDDEN_KEY_SUFFIXES)
-    )
 
 _REQUIRED_PROJECT_FIELDS = (
     "id",
@@ -49,6 +93,30 @@ class OnboardingStep:
     id: str
     title: str
     description: str
+    state: str = _DEFAULT_ONBOARDING_STATE
+    required: bool = True
+
+
+@dataclass(frozen=True)
+class OnboardingSummary:
+    """Aggregate onboarding progress for a single project."""
+
+    total: int
+    complete: int
+    pending: int
+    blocked: int
+    not_applicable: int
+    required_outstanding: int
+    onboarding_complete: bool
+
+
+@dataclass(frozen=True)
+class ProjectHealth:
+    """Redacted last-seen health. Never carries endpoints or credentials."""
+
+    status: str
+    checked_at: str | None
+    detail: str | None
 
 
 @dataclass(frozen=True)
@@ -63,6 +131,13 @@ class ProjectRecord:
     workflow_paths: dict[str, str]
     schema_paths: dict[str, str]
     onboarding_checklist: tuple[OnboardingStep, ...]
+    status: str = _DEFAULT_PROJECT_STATUS
+    remote_name: str | None = None
+    last_seen_health: ProjectHealth | None = None
+
+    @property
+    def repo_full_name(self) -> str:
+        return f"{self.gitea_owner}/{self.repo_name}"
 
 
 @dataclass(frozen=True)
@@ -71,6 +146,15 @@ class ProjectRegistry:
     projects: tuple[ProjectRecord, ...]
     source_path: Path
 
+    @property
+    def schema_version(self) -> int:
+        """Alias of :attr:`version` — the schema version read from disk."""
+        return self.version
+
+    @property
+    def api_version(self) -> str:
+        return REGISTRY_API_VERSION
+
 
 def default_registry_path() -> Path:
     override = os.environ.get("WEBUI_PROJECT_REGISTRY", "").strip()
@@ -79,52 +163,221 @@ def default_registry_path() -> Path:
     return (Path(__file__).resolve().parent / "data" / "projects.registry.json").resolve()
 
 
-def _reject_credential_keys(obj: Any, *, path: str = "") -> None:
+def _reject_credential_keys(obj: Any, *, path: str = "", source: Path | None = None) -> None:
+    """Recursive credential-key guard that reports an actionable ``field_path``.
+
+    Key *shape* is decided by :func:`webui.registry_safety.is_forbidden_key`, the
+    single source of truth shared with the worker registry (#798).
+    """
     if isinstance(obj, dict):
         for key, value in obj.items():
             key_path = f"{path}.{key}" if path else key
-            if _is_forbidden_key(key):
-                raise ValueError(f"registry must not store credentials ({key_path})")
-            _reject_credential_keys(value, path=key_path)
+            if is_forbidden_key(key):
+                raise RegistryError(
+                    f"registry must not store credentials ({key_path})",
+                    remediation=(
+                        f"Remove the credential-shaped key '{key_path}' from the registry. "
+                        "Tokens live in the keychain and are resolved server-side by "
+                        "gitea_auth; the registry is redacted metadata only."
+                    ),
+                    source_path=source,
+                    field_path=key_path,
+                )
+            _reject_credential_keys(value, path=key_path, source=source)
     elif isinstance(obj, list):
         for index, item in enumerate(obj):
-            _reject_credential_keys(item, path=f"{path}[{index}]")
+            _reject_credential_keys(item, path=f"{path}[{index}]", source=source)
 
 
-def _parse_onboarding(raw: list[dict[str, Any]] | None) -> tuple[OnboardingStep, ...]:
-    if not raw:
+def _require_enum(
+    value: Any,
+    *,
+    allowed: tuple[str, ...],
+    field_path: str,
+    source: Path | None,
+) -> str:
+    text = str(value)
+    if text not in allowed:
+        raise RegistryError(
+            f"{field_path} must be one of {', '.join(allowed)} (got {text!r})",
+            remediation=(
+                f"Set {field_path} to one of: {', '.join(allowed)}. "
+                "Unknown values fail closed so the console never renders an "
+                "unverified state."
+            ),
+            source_path=source,
+            field_path=field_path,
+        )
+    return text
+
+
+def _parse_onboarding(
+    raw: Any,
+    *,
+    project_path: str,
+    source: Path | None,
+) -> tuple[OnboardingStep, ...]:
+    if raw is None:
         return ()
+    if not isinstance(raw, list):
+        raise RegistryError(
+            f"{project_path}.onboarding_checklist must be an array",
+            remediation=(
+                f"Rewrite {project_path}.onboarding_checklist as a JSON array of "
+                "steps with id, title, description, and optional state."
+            ),
+            source_path=source,
+            field_path=f"{project_path}.onboarding_checklist",
+        )
     steps: list[OnboardingStep] = []
-    for item in raw:
+    for index, item in enumerate(raw):
+        step_path = f"{project_path}.onboarding_checklist[{index}]"
+        if not isinstance(item, dict):
+            raise RegistryError(
+                f"{step_path} must be an object",
+                remediation=f"Rewrite {step_path} as an object with id, title, description.",
+                source_path=source,
+                field_path=step_path,
+            )
+        missing = [field for field in ("id", "title", "description") if field not in item]
+        if missing:
+            raise RegistryError(
+                f"{step_path} missing required fields: {', '.join(missing)}",
+                remediation=(
+                    f"Add {', '.join(missing)} to {step_path}. Every onboarding step "
+                    "must be self-describing for an operator who has no chat history."
+                ),
+                source_path=source,
+                field_path=step_path,
+            )
+        state = _require_enum(
+            item.get("state", _DEFAULT_ONBOARDING_STATE),
+            allowed=ONBOARDING_STATES,
+            field_path=f"{step_path}.state",
+            source=source,
+        )
         steps.append(
             OnboardingStep(
                 id=str(item["id"]),
                 title=str(item["title"]),
                 description=str(item["description"]),
+                state=state,
+                required=bool(item.get("required", True)),
             )
         )
     return tuple(steps)
 
 
-def _parse_project(raw: dict[str, Any]) -> ProjectRecord:
+def _parse_health(
+    raw: Any,
+    *,
+    project_path: str,
+    source: Path | None,
+) -> ProjectHealth | None:
+    if raw is None:
+        return None
+    if not isinstance(raw, dict):
+        raise RegistryError(
+            f"{project_path}.last_seen_health must be an object when present",
+            remediation=(
+                f"Rewrite {project_path}.last_seen_health as an object with status "
+                f"(one of {', '.join(HEALTH_STATUSES)}), optional checked_at and detail, "
+                "or remove it. Never store endpoints or credentials here."
+            ),
+            source_path=source,
+            field_path=f"{project_path}.last_seen_health",
+        )
+    status = _require_enum(
+        raw.get("status", "unknown"),
+        allowed=HEALTH_STATUSES,
+        field_path=f"{project_path}.last_seen_health.status",
+        source=source,
+    )
+    checked_at = raw.get("checked_at")
+    detail = raw.get("detail")
+    return ProjectHealth(
+        status=status,
+        checked_at=str(checked_at) if checked_at is not None else None,
+        detail=str(detail) if detail is not None else None,
+    )
+
+
+def _parse_project(raw: Any, *, index: int, source: Path | None) -> ProjectRecord:
+    project_path = f"projects[{index}]"
+    if not isinstance(raw, dict):
+        raise RegistryError(
+            f"{project_path} must be an object",
+            remediation=f"Rewrite {project_path} as a JSON object describing one project.",
+            source_path=source,
+            field_path=project_path,
+        )
+
     missing = [field for field in _REQUIRED_PROJECT_FIELDS if field not in raw]
     if missing:
-        raise ValueError(f"project missing required fields: {', '.join(missing)}")
+        raise RegistryError(
+            f"{project_path} missing required fields: {', '.join(missing)}",
+            remediation=(
+                f"Add {', '.join(missing)} to {project_path}. See "
+                "docs/webui-project-registry-api.md for the field-by-field contract."
+            ),
+            source_path=source,
+            field_path=project_path,
+        )
 
     profiles = raw["profiles"]
     if not isinstance(profiles, dict):
-        raise ValueError("profiles must be an object")
+        raise RegistryError(
+            f"{project_path}.profiles must be an object",
+            remediation=(
+                f"Rewrite {project_path}.profiles as an object mapping "
+                f"{', '.join(_REQUIRED_PROFILE_ROLES)} to MCP profile names."
+            ),
+            source_path=source,
+            field_path=f"{project_path}.profiles",
+        )
     for role in _REQUIRED_PROFILE_ROLES:
         if role not in profiles or not profiles[role]:
-            raise ValueError(f"profiles.{role} is required")
+            raise RegistryError(
+                f"{project_path}.profiles.{role} is required",
+                remediation=(
+                    f"Set {project_path}.profiles.{role} to the configured MCP profile "
+                    "name for that role. Role separation is a workflow-safety invariant."
+                ),
+                source_path=source,
+                field_path=f"{project_path}.profiles.{role}",
+            )
 
     workflow_paths = raw["workflow_paths"]
     if not isinstance(workflow_paths, dict) or not workflow_paths:
-        raise ValueError("workflow_paths must be a non-empty object")
+        raise RegistryError(
+            f"{project_path}.workflow_paths must be a non-empty object",
+            remediation=(
+                f"Add at least a 'skill' entry to {project_path}.workflow_paths pointing "
+                "at the project's canonical workflow skill."
+            ),
+            source_path=source,
+            field_path=f"{project_path}.workflow_paths",
+        )
 
     schema_paths = raw.get("schema_paths") or {}
     if not isinstance(schema_paths, dict):
-        raise ValueError("schema_paths must be an object when present")
+        raise RegistryError(
+            f"{project_path}.schema_paths must be an object when present",
+            remediation=(
+                f"Rewrite {project_path}.schema_paths as an object of label to repo path, "
+                "or remove it."
+            ),
+            source_path=source,
+            field_path=f"{project_path}.schema_paths",
+        )
+
+    status = _require_enum(
+        raw.get("status", _DEFAULT_PROJECT_STATUS),
+        allowed=PROJECT_STATUSES,
+        field_path=f"{project_path}.status",
+        source=source,
+    )
+    remote_name = raw.get("remote_name")
 
     return ProjectRecord(
         id=str(raw["id"]),
@@ -136,61 +389,211 @@ def _parse_project(raw: dict[str, Any]) -> ProjectRecord:
         profiles={role: str(profiles[role]) for role in _REQUIRED_PROFILE_ROLES},
         workflow_paths={key: str(value) for key, value in workflow_paths.items()},
         schema_paths={key: str(value) for key, value in schema_paths.items()},
-        onboarding_checklist=_parse_onboarding(raw.get("onboarding_checklist")),
+        onboarding_checklist=_parse_onboarding(
+            raw.get("onboarding_checklist"),
+            project_path=project_path,
+            source=source,
+        ),
+        status=status,
+        remote_name=str(remote_name) if remote_name else None,
+        last_seen_health=_parse_health(
+            raw.get("last_seen_health"),
+            project_path=project_path,
+            source=source,
+        ),
     )
 
 
 def load_registry(path: Path | None = None) -> ProjectRegistry:
-    """Load the versioned project registry from disk."""
+    """Load the versioned project registry from disk.
+
+    Raises:
+        RegistryError: whenever the file is unreadable, is not valid JSON, or
+            fails schema validation. The error carries an operator remediation.
+    """
     source = (path or default_registry_path()).resolve()
+    try:
         raw_text = source.read_text(encoding="utf-8")
+    except OSError as exc:
+        raise RegistryError(
+            f"registry file could not be read: {exc.strerror or exc}",
+            remediation=(
+                f"Create a readable registry at {source}, or point "
+                "WEBUI_PROJECT_REGISTRY at an existing file."
+            ),
+            source_path=source,
+        ) from exc
+
+    try:
         payload = json.loads(raw_text)
+    except json.JSONDecodeError as exc:
+        raise RegistryError(
+            f"registry is not valid JSON: {exc.msg} (line {exc.lineno}, column {exc.colno})",
+            remediation=(
+                f"Fix the JSON syntax in {source} at line {exc.lineno}, column {exc.colno}."
+            ),
+            source_path=source,
+        ) from exc
+
     if not isinstance(payload, dict):
-        raise ValueError("registry root must be an object")
+        raise RegistryError(
+            "registry root must be an object",
+            remediation=(
+                "Wrap the registry in a JSON object with 'version' and 'projects' keys."
+            ),
+            source_path=source,
+        )
 
     version = payload.get("version")
-    if version != 1:
-        raise ValueError(f"unsupported registry version: {version!r}")
+    if version not in SUPPORTED_SCHEMA_VERSIONS:
+        supported = ", ".join(str(item) for item in SUPPORTED_SCHEMA_VERSIONS)
+        raise RegistryError(
+            f"unsupported registry version: {version!r}",
+            remediation=(
+                f"Set 'version' to one of {supported} (current schema is "
+                f"{CURRENT_SCHEMA_VERSION}). Migration notes live in "
+                "docs/webui-project-registry-api.md."
+            ),
+            source_path=source,
+            field_path="version",
+        )
 
-    _reject_credential_keys(payload)
+    _reject_credential_keys(payload, source=source)
 
     projects_raw = payload.get("projects")
     if not isinstance(projects_raw, list) or not projects_raw:
-        raise ValueError("projects must be a non-empty array")
+        raise RegistryError(
+            "projects must be a non-empty array",
+            remediation=(
+                "Add at least one project object to 'projects'. An empty console "
+                "registry fails closed rather than rendering a blank inventory."
+            ),
+            source_path=source,
+            field_path="projects",
+        )
 
-    projects = tuple(_parse_project(item) for item in projects_raw)
-    return ProjectRegistry(version=version, projects=projects, source_path=source)
+    projects = tuple(
+        _parse_project(item, index=index, source=source)
+        for index, item in enumerate(projects_raw)
+    )
+    return ProjectRegistry(version=int(version), projects=projects, source_path=source)
+
+
+def onboarding_summary(project: ProjectRecord) -> OnboardingSummary:
+    """Aggregate a project's onboarding checklist state."""
+    steps = project.onboarding_checklist
+    counts = {state: 0 for state in ONBOARDING_STATES}
+    for step in steps:
+        counts[step.state] += 1
+    required_outstanding = sum(
+        1
+        for step in steps
+        if step.required and step.state in ("pending", "blocked")
+    )
+    return OnboardingSummary(
+        total=len(steps),
+        complete=counts["complete"],
+        pending=counts["pending"],
+        blocked=counts["blocked"],
+        not_applicable=counts["not_applicable"],
+        required_outstanding=required_outstanding,
+        onboarding_complete=required_outstanding == 0,
+    )
 
 
 def project_to_dict(project: ProjectRecord) -> dict[str, Any]:
-    """Serialize a project for JSON API responses."""
+    """Serialize a project for JSON API responses and HTML views.
+
+    The HTML views render from this same DTO, so the console and the API can
+    never disagree about a project's status or onboarding progress.
+    """
+    summary = onboarding_summary(project)
+    health = project.last_seen_health
     return {
         "id": project.id,
         "repo_name": project.repo_name,
         "gitea_owner": project.gitea_owner,
+        "repo_full_name": project.repo_full_name,
         "remote_host": project.remote_host,
+        "remote_name": project.remote_name,
         "default_branch": project.default_branch,
         "local_checkout_path": project.local_checkout_path,
+        "status": project.status,
         "profiles": dict(project.profiles),
         "workflow_paths": dict(project.workflow_paths),
         "schema_paths": dict(project.schema_paths),
         "onboarding_checklist": [
-            {"id": step.id, "title": step.title, "description": step.description}
+            {
+                "id": step.id,
+                "title": step.title,
+                "description": step.description,
+                "state": step.state,
+                "required": step.required,
+            }
             for step in project.onboarding_checklist
         ],
+        "onboarding_summary": {
+            "total": summary.total,
+            "complete": summary.complete,
+            "pending": summary.pending,
+            "blocked": summary.blocked,
+            "not_applicable": summary.not_applicable,
+            "required_outstanding": summary.required_outstanding,
+            "onboarding_complete": summary.onboarding_complete,
+        },
+        "last_seen_health": (
+            None
+            if health is None
+            else {
+                "status": health.status,
+                "checked_at": health.checked_at,
+                "detail": health.detail,
+            }
+        ),
     }
 
 
 def registry_to_dict(registry: ProjectRegistry) -> dict[str, Any]:
+    """Serialize the whole registry, including API provenance (#632 section 6)."""
     return {
+        "api_version": registry.api_version,
+        "schema_version": registry.schema_version,
+        # Retained for the unversioned MVP alias consumers (#427).
         "version": registry.version,
         "source_path": str(registry.source_path),
+        "source": {
+            "kind": "file",
+            "path": str(registry.source_path),
+            "inventory_complete": True,
+        },
+        "project_count": len(registry.projects),
         "projects": [project_to_dict(project) for project in registry.projects],
     }
 
 
+def project_detail_to_dict(
+    registry: ProjectRegistry,
+    project: ProjectRecord,
+) -> dict[str, Any]:
+    """Serialize a single project for ``/api/v1/projects/{project_id}``."""
+    return {
+        "api_version": registry.api_version,
+        "schema_version": registry.schema_version,
+        "source": {
+            "kind": "file",
+            "path": str(registry.source_path),
+            "inventory_complete": True,
+        },
+        "project": project_to_dict(project),
+    }
+
+
 def find_project(registry: ProjectRegistry, project_id: str) -> ProjectRecord | None:
     for project in registry.projects:
         if project.id == project_id:
             return project
     return None
+
+
+def known_project_ids(registry: ProjectRegistry) -> list[str]:
+    return [project.id for project in registry.projects]

webui/project_views.py

@@ -1,34 +1,65 @@
-"""HTML views for project registry pages (#427)."""
+"""HTML views for project registry pages (#427, evolved for #635).
+
+Every view renders from :func:`webui.project_registry.project_to_dict`, the
+same DTO the ``/api/v1/projects`` JSON responses use, so the HTML console and
+the API can never disagree about status or onboarding progress.
+"""
 
 from __future__ import annotations
 
 import html
+from typing import Any
 
 from webui.layout import render_page
-from webui.project_registry import ProjectRecord, ProjectRegistry
+from webui.project_registry import (
+    ProjectRecord,
+    ProjectRegistry,
+    RegistryError,
+    project_to_dict,
+)
+
+_STATE_LABELS = {
+    "complete": "Complete",
+    "pending": "Pending",
+    "blocked": "Blocked",
+    "not_applicable": "Not applicable",
+}
 
 
 def _escape(text: str) -> str:
     return html.escape(text, quote=True)
 
 
+def _progress_label(summary: dict[str, Any]) -> str:
+    total = summary["total"]
+    if not total:
+        return "no steps"
+    label = f"{summary['complete']}/{total} complete"
+    if summary["blocked"]:
+        label += f", {summary['blocked']} blocked"
+    return label
+
+
 def render_projects_list(registry: ProjectRegistry) -> str:
     rows = []
     for project in registry.projects:
+        dto = project_to_dict(project)
         rows.append(
             "<tr>"
-            f"<td><a href=\"/projects/{_escape(project.id)}\">{_escape(project.repo_name)}</a></td>"
-            f"<td>{_escape(project.gitea_owner)}</td>"
-            f"<td>{_escape(project.remote_host)}</td>"
-            f"<td>{_escape(project.default_branch)}</td>"
-            f"<td><code>{_escape(project.profiles['author'])}</code></td>"
+            f"<td><a href=\"/projects/{_escape(dto['id'])}\">{_escape(dto['repo_name'])}</a></td>"
+            f"<td>{_escape(dto['gitea_owner'])}</td>"
+            f"<td>{_escape(dto['remote_host'])}</td>"
+            f"<td>{_escape(dto['default_branch'])}</td>"
+            f"<td><code>{_escape(dto['status'])}</code></td>"
+            f"<td>{_escape(_progress_label(dto['onboarding_summary']))}</td>"
+            f"<td><code>{_escape(dto['profiles']['author'])}</code></td>"
             "</tr>"
         )
     table = (
         "<table class=\"registry\">"
         "<thead><tr>"
         "<th>Repository</th><th>Owner</th><th>Remote</th>"
-        "<th>Branch</th><th>Author profile</th>"
+        "<th>Branch</th><th>Status</th><th>Onboarding</th><th>Author profile</th>"
         "</tr></thead>"
         f"<tbody>{''.join(rows)}</tbody></table>"
     )
@@ -36,32 +67,39 @@ def render_projects_list(registry: ProjectRegistry) -> str:
         "<h2>Projects</h2>"
         "<p>Configured repositories managed by the MCP Control Plane.</p>"
         f"<p class=\"meta\">Registry: <code>{_escape(str(registry.source_path))}</code> "
-        f"(version {registry.version})</p>"
+        f"(schema version {registry.schema_version}, "
+        f"API {_escape(registry.api_version)})</p>"
         f"{table}"
-        "<p><a href=\"/api/projects\">JSON API</a></p>"
+        "<p><a href=\"/api/v1/projects\">JSON API</a> "
+        "(<a href=\"/api/projects\">unversioned alias</a>)</p>"
     )
     return render_page(title="Projects", body_html=body)
 
 
 def render_project_detail(project: ProjectRecord) -> str:
+    dto = project_to_dict(project)
     profile_rows = "".join(
         f"<tr><th>{_escape(role)}</th><td><code>{_escape(name)}</code></td></tr>"
-        for role, name in project.profiles.items()
+        for role, name in dto["profiles"].items()
     )
     workflow_rows = "".join(
         f"<tr><th>{_escape(key)}</th><td><code>{_escape(path)}</code></td></tr>"
-        for key, path in project.workflow_paths.items()
+        for key, path in dto["workflow_paths"].items()
     )
     schema_rows = "".join(
         f"<tr><th>{_escape(key)}</th><td><code>{_escape(path)}</code></td></tr>"
-        for key, path in project.schema_paths.items()
+        for key, path in dto["schema_paths"].items()
     )
     checklist_items = []
-    for index, step in enumerate(project.onboarding_checklist, start=1):
+    for index, step in enumerate(dto["onboarding_checklist"], start=1):
+        state_label = _STATE_LABELS.get(step["state"], step["state"])
+        requirement = "required" if step["required"] else "optional"
         checklist_items.append(
-            "<li>"
-            f"<strong>{index}. {_escape(step.title)}</strong>"
-            f"<p>{_escape(step.description)}</p>"
+            f"<li class=\"step-{_escape(step['state'])}\">"
+            f"<strong>{index}. {_escape(step['title'])}</strong>"
+            f" <span class=\"badge\">{_escape(state_label)}</span>"
+            f" <span class=\"meta\">({_escape(requirement)})</span>"
+            f"<p>{_escape(step['description'])}</p>"
             "</li>"
         )
     checklist_html = (
@@ -69,16 +107,38 @@ def render_project_detail(project: ProjectRecord) -> str:
         if checklist_items
         else "<p>No onboarding steps defined.</p>"
     )
+    summary = dto["onboarding_summary"]
+    summary_html = (
+        "<p class=\"meta\">Onboarding: "
+        f"{_escape(_progress_label(summary))}; required outstanding "
+        f"{summary['required_outstanding']}.</p>"
+    )
+    health = dto["last_seen_health"]
+    health_html = (
+        "<p class=\"meta\">No health probe recorded (Phase 1 is read-only).</p>"
+        if health is None
+        else (
+            "<table class=\"detail\">"
+            f"<tr><th>Status</th><td><code>{_escape(health['status'])}</code></td></tr>"
+            f"<tr><th>Checked at</th><td>{_escape(str(health['checked_at'] or 'unknown'))}</td></tr>"
+            f"<tr><th>Detail</th><td>{_escape(str(health['detail'] or ''))}</td></tr>"
+            "</table>"
+        )
+    )
+    remote_name = dto["remote_name"] or "unset"
     body = (
-        f"<h2>{_escape(project.repo_name)}</h2>"
+        f"<h2>{_escape(dto['repo_name'])}</h2>"
         "<p><a href=\"/projects\">← All projects</a></p>"
         "<h3>Identity</h3>"
         "<table class=\"detail\">"
-        f"<tr><th>Registry id</th><td><code>{_escape(project.id)}</code></td></tr>"
-        f"<tr><th>Gitea owner</th><td>{_escape(project.gitea_owner)}</td></tr>"
-        f"<tr><th>Remote host</th><td>{_escape(project.remote_host)}</td></tr>"
-        f"<tr><th>Default branch</th><td><code>{_escape(project.default_branch)}</code></td></tr>"
-        f"<tr><th>Local checkout</th><td><code>{_escape(project.local_checkout_path)}</code></td></tr>"
+        f"<tr><th>Registry id</th><td><code>{_escape(dto['id'])}</code></td></tr>"
+        f"<tr><th>Status</th><td><code>{_escape(dto['status'])}</code></td></tr>"
+        f"<tr><th>Gitea owner</th><td>{_escape(dto['gitea_owner'])}</td></tr>"
+        f"<tr><th>Repository</th><td><code>{_escape(dto['repo_full_name'])}</code></td></tr>"
+        f"<tr><th>Remote name</th><td><code>{_escape(remote_name)}</code></td></tr>"
+        f"<tr><th>Remote host</th><td>{_escape(dto['remote_host'])}</td></tr>"
+        f"<tr><th>Default branch</th><td><code>{_escape(dto['default_branch'])}</code></td></tr>"
+        f"<tr><th>Local checkout</th><td><code>{_escape(dto['local_checkout_path'])}</code></td></tr>"
         "</table>"
         "<h3>Profiles</h3>"
         f"<table class=\"detail\">{profile_rows}</table>"
@@ -86,8 +146,30 @@ def render_project_detail(project: ProjectRecord) -> str:
         f"<table class=\"detail\">{workflow_rows}</table>"
         "<h3>Schema paths</h3>"
         f"<table class=\"detail\">{schema_rows}</table>"
+        "<h3>Last seen health</h3>"
+        f"{health_html}"
         "<h3>Onboarding checklist</h3>"
-        "<p class=\"meta\">Read-only MVP — complete these steps outside the UI.</p>"
+        "<p class=\"meta\">Read-only — complete these steps outside the UI.</p>"
+        f"{summary_html}"
         f"{checklist_html}"
+        f"<p><a href=\"/api/v1/projects/{_escape(dto['id'])}\">JSON detail</a></p>"
     )
-    return render_page(title=project.repo_name, body_html=body)
+    return render_page(title=dto["repo_name"], body_html=body)
+
+
+def render_registry_error(error: RegistryError) -> str:
+    """Render a fail-closed page for an invalid registry."""
+    source = str(error.source_path) if error.source_path else "unknown"
+    field = error.field_path or "n/a"
+    body = (
+        "<h2>Project registry unavailable</h2>"
+        "<p>The registry failed validation, so the console refuses to render a "
+        "partial inventory.</p>"
+        "<table class=\"detail\">"
+        f"<tr><th>Detail</th><td>{_escape(error.message)}</td></tr>"
+        f"<tr><th>Field</th><td><code>{_escape(field)}</code></td></tr>"
+        f"<tr><th>Source</th><td><code>{_escape(source)}</code></td></tr>"
+        f"<tr><th>Remediation</th><td>{_escape(error.remediation)}</td></tr>"
+        "</table>"
+    )
+    return render_page(title="Project registry unavailable", body_html=body)

webui/registry_safety.py

@@ -0,0 +1,52 @@
+"""Shared credential-rejection guard for web UI registries (#427, #798).
+
+Registries are operator-editable declarative files that the web UI loads and,
+for the worker registry, writes back. None of them may ever carry a secret:
+credentials belong in the keychain and reach worker processes through
+environment injection, never through a file the browser layer can read.
+
+The check is structural rather than value-based on purpose. A value scanner has
+to guess what a secret looks like; a key scanner refuses the *shape* of a
+credential field, so an operator cannot introduce one by accident and a later
+loader cannot silently pass one through.
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+_FORBIDDEN_EXACT_KEYS = frozenset({
+    "token",
+    "password",
+    "secret",
+    "credential",
+    "auth",
+    "api_key",
+    "api-key",
+})
+_FORBIDDEN_KEY_PREFIXES = ("auth_", "api_key_", "api-key_")
+_FORBIDDEN_KEY_SUFFIXES = ("_token", "_secret", "_password", "_credential", "_auth")
+
+
+def is_forbidden_key(key: str) -> bool:
+    """Return True when *key* names a credential field."""
+    lowered = key.lower()
+    if lowered in _FORBIDDEN_EXACT_KEYS:
+        return True
+    return (
+        lowered.startswith(_FORBIDDEN_KEY_PREFIXES)
+        or lowered.endswith(_FORBIDDEN_KEY_SUFFIXES)
+    )
+
+
+def reject_credential_keys(obj: Any, *, path: str = "", subject: str = "registry") -> None:
+    """Raise ValueError when *obj* carries a credential-shaped key at any depth."""
+    if isinstance(obj, dict):
+        for key, value in obj.items():
+            key_path = f"{path}.{key}" if path else key
+            if is_forbidden_key(key):
+                raise ValueError(f"{subject} must not store credentials ({key_path})")
+            reject_credential_keys(value, path=key_path, subject=subject)
+    elif isinstance(obj, list):
+        for index, item in enumerate(obj):
+            reject_credential_keys(item, path=f"{path}[{index}]", subject=subject)

webui/worker_registry.py

@@ -0,0 +1,647 @@
+"""Declarative worker registry and configuration schema (#798, epic #797).
+
+The registry is the single source of truth for the scheduled multi-LLM worker
+fleet. It is a versioned JSON document holding two *separate* entity kinds:
+
+* **Providers** — the LLM runtimes a worker can be built on (Claude, Grok,
+  Codex, AGY, Kimi K). A provider describes the runtime itself: vendor,
+  executable name, models it can serve, and whether it is available on this
+  machine. Providers exist whether or not any worker uses them.
+* **Workers** — a configured *instance*: one provider, one model, one project,
+  one role, one MCP namespace/profile, one workflow, one schedule. Several
+  workers may share a provider; a worker naming an undeclared provider is
+  refused.
+
+Keeping them separate is what lets #799 list all five providers even when a
+provider currently has no configured worker, and it stops provider facts from
+being copied into (and drifting across) every worker record.
+
+Scope boundary. This module owns the data model, its validation, and its
+persistence. It does **not** schedule anything, launch anything, probe provider
+executables, or serve HTTP. Loading a registry never touches a process; the
+live fields a dashboard wants (PID, elapsed time, next run) are derived
+elsewhere (#799, #801, #803, #804) from these declarations.
+
+Safety invariants:
+
+* No credential may be stored (:mod:`webui.registry_safety`), so the registry
+  stays safe to render and to hand to a browser layer.
+* Validation fails closed. Unknown fields are refused rather than ignored, so a
+  typo cannot silently disable a timeout or a role binding.
+* Writes are atomic and every superseded document is retained as a numbered
+  revision, so a bad edit is recoverable by rollback rather than hand-repair.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+import re
+import tempfile
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+from webui.registry_safety import reject_credential_keys
+
+SCHEMA_VERSION = 1
+
+#: Roles a worker may hold. These mirror the sanctioned MCP role kinds; a
+#: worker may not invent one, because the role selects the namespace/profile
+#: whose capability gates constrain it.
+ALLOWED_ROLES = ("author", "reviewer", "merger", "reconciler", "cleanup")
+
+#: Scheduler backends the registry can describe. ``manual`` means the worker is
+#: only ever started on request and has no recurring trigger.
+ALLOWED_SCHEDULER_KINDS = ("launchd", "manual")
+
+#: Schedule kinds. Next-run computation belongs to #803; this module only
+#: guarantees the declaration is well formed.
+ALLOWED_SCHEDULE_KINDS = ("interval", "cron", "manual")
+
+_REQUIRED_PROVIDER_FIELDS = ("id", "display_name", "vendor", "executable", "available")
+_OPTIONAL_PROVIDER_FIELDS = ("models", "notes")
+
+_REQUIRED_WORKER_FIELDS = (
+    "id",
+    "display_name",
+    "provider",
+    "model",
+    "project",
+    "role",
+    "namespace",
+    "profile",
+    "workflow",
+    "schedule",
+    "timeout_seconds",
+    "enabled",
+    "scheduler",
+)
+_OPTIONAL_WORKER_FIELDS = ("notes",)
+
+_ID_RE = re.compile(r"^[a-z0-9][a-z0-9._-]*$")
+
+#: Guards against an operator writing a timeout that would let a worker hold a
+#: lease effectively forever. 24h is far above any sanctioned cycle.
+_MAX_TIMEOUT_SECONDS = 86_400
+
+#: How many superseded revisions to retain beside the live file.
+_HISTORY_LIMIT = 20
+
+_TOP_LEVEL_FIELDS = frozenset({"version", "revision", "updated_at", "providers", "workers"})
+
+
+class RegistryValidationError(ValueError):
+    """Raised when a registry document violates the schema."""
+
+
+@dataclass(frozen=True)
+class ProviderRecord:
+    id: str
+    display_name: str
+    vendor: str
+    executable: str
+    available: bool
+    models: tuple[str, ...]
+    notes: str
+
+
+@dataclass(frozen=True)
+class ScheduleSpec:
+    kind: str
+    #: Set for ``interval`` schedules.
+    seconds: int | None
+    #: Set for ``cron`` schedules — a five-field crontab expression.
+    expression: str | None
+
+
+@dataclass(frozen=True)
+class SchedulerSpec:
+    kind: str
+    #: LaunchAgent label; required for ``launchd``, absent for ``manual``.
+    label: str | None
+
+
+@dataclass(frozen=True)
+class WorkerRecord:
+    id: str
+    display_name: str
+    provider: str
+    model: str
+    project: str
+    role: str
+    namespace: str
+    profile: str
+    workflow: str
+    schedule: ScheduleSpec
+    timeout_seconds: int
+    enabled: bool
+    scheduler: SchedulerSpec
+    notes: str
+
+
+@dataclass(frozen=True)
+class WorkerRegistry:
+    version: int
+    revision: int
+    updated_at: str
+    providers: tuple[ProviderRecord, ...]
+    workers: tuple[WorkerRecord, ...]
+    source_path: Path
+
+
+# ── paths ────────────────────────────────────────────────────────────────────
+
+
+def default_registry_path() -> Path:
+    """Location of the packaged worker registry, overridable for tests/deploys."""
+    override = os.environ.get("WEBUI_WORKER_REGISTRY", "").strip()
+    if override:
+        return Path(override).expanduser().resolve()
+    return (Path(__file__).resolve().parent / "data" / "workers.registry.json").resolve()
+
+
+def history_dir(path: Path | None = None) -> Path:
+    """Directory holding superseded revisions of *path*."""
+    source = (path or default_registry_path()).resolve()
+    return source.parent / f"{source.name}.history"
+
+
+# ── field helpers ────────────────────────────────────────────────────────────
+
+
+def _require_exact_fields(
+    raw: Any,
+    *,
+    required: tuple[str, ...],
+    optional: tuple[str, ...],
+    subject: str,
+) -> dict[str, Any]:
+    if not isinstance(raw, dict):
+        raise RegistryValidationError(f"{subject} must be an object")
+    missing = [field for field in required if field not in raw]
+    if missing:
+        raise RegistryValidationError(
+            f"{subject} missing required fields: {', '.join(sorted(missing))}"
+        )
+    unknown = sorted(set(raw) - set(required) - set(optional))
+    if unknown:
+        # Fail closed: silently dropping an unrecognized key is how a typo'd
+        # "timeout_second" ends up meaning "no timeout".
+        raise RegistryValidationError(f"{subject} has unknown fields: {', '.join(unknown)}")
+    return raw
+
+
+def _require_identifier(value: Any, *, subject: str) -> str:
+    text = str(value).strip()
+    if not _ID_RE.match(text):
+        raise RegistryValidationError(
+            f"{subject} must be lowercase alphanumeric with '.', '_', or '-' (got {value!r})"
+        )
+    return text
+
+
+def _require_text(value: Any, *, subject: str) -> str:
+    if not isinstance(value, str):
+        raise RegistryValidationError(f"{subject} must be a string (got {value!r})")
+    text = value.strip()
+    if not text:
+        raise RegistryValidationError(f"{subject} must be a non-empty string")
+    return text
+
+
+def _require_bool(value: Any, *, subject: str) -> bool:
+    if not isinstance(value, bool):
+        raise RegistryValidationError(f"{subject} must be a boolean (got {value!r})")
+    return value
+
+
+def _require_positive_int(value: Any, *, subject: str, maximum: int | None = None) -> int:
+    if isinstance(value, bool) or not isinstance(value, int):
+        raise RegistryValidationError(f"{subject} must be an integer (got {value!r})")
+    if value <= 0:
+        raise RegistryValidationError(f"{subject} must be greater than zero (got {value})")
+    if maximum is not None and value > maximum:
+        raise RegistryValidationError(f"{subject} must not exceed {maximum} (got {value})")
+    return value
+
+
+# ── parsing ──────────────────────────────────────────────────────────────────
+
+
+def _parse_provider(raw: Any) -> ProviderRecord:
+    data = _require_exact_fields(
+        raw,
+        required=_REQUIRED_PROVIDER_FIELDS,
+        optional=_OPTIONAL_PROVIDER_FIELDS,
+        subject="provider",
+    )
+    provider_id = _require_identifier(data["id"], subject="provider.id")
+
+    models_raw = data.get("models") or []
+    if not isinstance(models_raw, list):
+        raise RegistryValidationError(f"provider[{provider_id}].models must be an array")
+    models = tuple(
+        _require_text(item, subject=f"provider[{provider_id}].models[]") for item in models_raw
+    )
+
+    return ProviderRecord(
+        id=provider_id,
+        display_name=_require_text(
+            data["display_name"], subject=f"provider[{provider_id}].display_name"
+        ),
+        vendor=_require_text(data["vendor"], subject=f"provider[{provider_id}].vendor"),
+        executable=_require_text(data["executable"], subject=f"provider[{provider_id}].executable"),
+        available=_require_bool(data["available"], subject=f"provider[{provider_id}].available"),
+        models=models,
+        notes=str(data.get("notes") or "").strip(),
+    )
+
+
+def _parse_schedule(raw: Any, *, subject: str) -> ScheduleSpec:
+    if not isinstance(raw, dict):
+        raise RegistryValidationError(f"{subject} must be an object")
+    kind = _require_text(raw.get("kind"), subject=f"{subject}.kind")
+    if kind not in ALLOWED_SCHEDULE_KINDS:
+        raise RegistryValidationError(
+            f"{subject}.kind must be one of {', '.join(ALLOWED_SCHEDULE_KINDS)} (got {kind!r})"
+        )
+
+    seconds: int | None = None
+    expression: str | None = None
+
+    if kind == "interval":
+        if "seconds" not in raw:
+            raise RegistryValidationError(f"{subject}.seconds is required for interval schedules")
+        seconds = _require_positive_int(raw["seconds"], subject=f"{subject}.seconds")
+    elif kind == "cron":
+        if "expression" not in raw:
+            raise RegistryValidationError(f"{subject}.expression is required for cron schedules")
+        expression = _require_text(raw["expression"], subject=f"{subject}.expression")
+        if len(expression.split()) != 5:
+            raise RegistryValidationError(
+                f"{subject}.expression must have five crontab fields (got {expression!r})"
+            )
+
+    allowed = {"kind"}
+    if kind == "interval":
+        allowed.add("seconds")
+    elif kind == "cron":
+        allowed.add("expression")
+    unknown = sorted(set(raw) - allowed)
+    if unknown:
+        raise RegistryValidationError(
+            f"{subject} has fields not valid for kind {kind!r}: {', '.join(unknown)}"
+        )
+
+    return ScheduleSpec(kind=kind, seconds=seconds, expression=expression)
+
+
+def _parse_scheduler(raw: Any, *, subject: str) -> SchedulerSpec:
+    if not isinstance(raw, dict):
+        raise RegistryValidationError(f"{subject} must be an object")
+    kind = _require_text(raw.get("kind"), subject=f"{subject}.kind")
+    if kind not in ALLOWED_SCHEDULER_KINDS:
+        raise RegistryValidationError(
+            f"{subject}.kind must be one of {', '.join(ALLOWED_SCHEDULER_KINDS)} (got {kind!r})"
+        )
+
+    label: str | None = None
+    if kind == "launchd":
+        if "label" not in raw:
+            raise RegistryValidationError(f"{subject}.label is required for launchd schedulers")
+        label = _require_text(raw["label"], subject=f"{subject}.label")
+
+    allowed = {"kind"}
+    if kind == "launchd":
+        allowed.add("label")
+    unknown = sorted(set(raw) - allowed)
+    if unknown:
+        raise RegistryValidationError(
+            f"{subject} has fields not valid for kind {kind!r}: {', '.join(unknown)}"
+        )
+
+    return SchedulerSpec(kind=kind, label=label)
+
+
+def _parse_worker(raw: Any) -> WorkerRecord:
+    data = _require_exact_fields(
+        raw,
+        required=_REQUIRED_WORKER_FIELDS,
+        optional=_OPTIONAL_WORKER_FIELDS,
+        subject="worker",
+    )
+    worker_id = _require_identifier(data["id"], subject="worker.id")
+
+    role = _require_text(data["role"], subject=f"worker[{worker_id}].role")
+    if role not in ALLOWED_ROLES:
+        raise RegistryValidationError(
+            f"worker[{worker_id}].role must be one of {', '.join(ALLOWED_ROLES)} (got {role!r})"
+        )
+
+    return WorkerRecord(
+        id=worker_id,
+        display_name=_require_text(
+            data["display_name"], subject=f"worker[{worker_id}].display_name"
+        ),
+        provider=_require_identifier(data["provider"], subject=f"worker[{worker_id}].provider"),
+        model=_require_text(data["model"], subject=f"worker[{worker_id}].model"),
+        project=_require_text(data["project"], subject=f"worker[{worker_id}].project"),
+        role=role,
+        namespace=_require_text(data["namespace"], subject=f"worker[{worker_id}].namespace"),
+        profile=_require_text(data["profile"], subject=f"worker[{worker_id}].profile"),
+        workflow=_require_text(data["workflow"], subject=f"worker[{worker_id}].workflow"),
+        schedule=_parse_schedule(data["schedule"], subject=f"worker[{worker_id}].schedule"),
+        timeout_seconds=_require_positive_int(
+            data["timeout_seconds"],
+            subject=f"worker[{worker_id}].timeout_seconds",
+            maximum=_MAX_TIMEOUT_SECONDS,
+        ),
+        enabled=_require_bool(data["enabled"], subject=f"worker[{worker_id}].enabled"),
+        scheduler=_parse_scheduler(data["scheduler"], subject=f"worker[{worker_id}].scheduler"),
+        notes=str(data.get("notes") or "").strip(),
+    )
+
+
+def _require_unique(values: list[str], *, subject: str) -> None:
+    seen: set[str] = set()
+    for value in values:
+        if value in seen:
+            raise RegistryValidationError(f"duplicate {subject}: {value}")
+        seen.add(value)
+
+
+def validate_payload(payload: Any, *, source_path: Path) -> WorkerRegistry:
+    """Validate a decoded registry document and return the typed registry.
+
+    Raises :class:`RegistryValidationError` on any violation; never partially
+    accepts a document.
+    """
+    if not isinstance(payload, dict):
+        raise RegistryValidationError("registry root must be an object")
+
+    version = payload.get("version")
+    if version != SCHEMA_VERSION:
+        raise RegistryValidationError(f"unsupported registry version: {version!r}")
+
+    reject_credential_keys(payload, subject="worker registry")
+
+    unknown = sorted(set(payload) - _TOP_LEVEL_FIELDS)
+    if unknown:
+        raise RegistryValidationError(f"registry has unknown fields: {', '.join(unknown)}")
+
+    revision = _require_positive_int(payload.get("revision"), subject="revision")
+    updated_at = _require_text(payload.get("updated_at"), subject="updated_at")
+
+    providers_raw = payload.get("providers")
+    if not isinstance(providers_raw, list) or not providers_raw:
+        raise RegistryValidationError("providers must be a non-empty array")
+    providers = tuple(_parse_provider(item) for item in providers_raw)
+    _require_unique([provider.id for provider in providers], subject="provider id")
+
+    workers_raw = payload.get("workers")
+    if not isinstance(workers_raw, list):
+        raise RegistryValidationError("workers must be an array")
+    workers = tuple(_parse_worker(item) for item in workers_raw)
+    _require_unique([worker.id for worker in workers], subject="worker id")
+
+    # Referential integrity: a worker naming an undeclared provider would look
+    # configured while being unrunnable, which is exactly the ambiguous
+    # ownership the epic requires to fail closed.
+    known_providers = {provider.id for provider in providers}
+    for worker in workers:
+        if worker.provider not in known_providers:
+            raise RegistryValidationError(
+                f"worker[{worker.id}].provider references unknown provider {worker.provider!r}"
+            )
+
+    # A LaunchAgent label identifies a job to launchd; two workers sharing one
+    # would silently overwrite each other's agent.
+    _require_unique(
+        [worker.scheduler.label for worker in workers if worker.scheduler.label],
+        subject="scheduler label",
+    )
+
+    return WorkerRegistry(
+        version=version,
+        revision=revision,
+        updated_at=updated_at,
+        providers=providers,
+        workers=workers,
+        source_path=source_path,
+    )
+
+
+def load_registry(path: Path | None = None) -> WorkerRegistry:
+    """Load and validate the worker registry from disk."""
+    source = (path or default_registry_path()).resolve()
+    payload = json.loads(source.read_text(encoding="utf-8"))
+    return validate_payload(payload, source_path=source)
+
+
+# ── serialization ────────────────────────────────────────────────────────────
+
+
+def provider_to_dict(provider: ProviderRecord) -> dict[str, Any]:
+    return {
+        "id": provider.id,
+        "display_name": provider.display_name,
+        "vendor": provider.vendor,
+        "executable": provider.executable,
+        "available": provider.available,
+        "models": list(provider.models),
+        "notes": provider.notes,
+    }
+
+
+def _schedule_to_dict(schedule: ScheduleSpec) -> dict[str, Any]:
+    payload: dict[str, Any] = {"kind": schedule.kind}
+    if schedule.kind == "interval":
+        payload["seconds"] = schedule.seconds
+    elif schedule.kind == "cron":
+        payload["expression"] = schedule.expression
+    return payload
+
+
+def _scheduler_to_dict(scheduler: SchedulerSpec) -> dict[str, Any]:
+    payload: dict[str, Any] = {"kind": scheduler.kind}
+    if scheduler.kind == "launchd":
+        payload["label"] = scheduler.label
+    return payload
+
+
+def worker_to_dict(worker: WorkerRecord) -> dict[str, Any]:
+    return {
+        "id": worker.id,
+        "display_name": worker.display_name,
+        "provider": worker.provider,
+        "model": worker.model,
+        "project": worker.project,
+        "role": worker.role,
+        "namespace": worker.namespace,
+        "profile": worker.profile,
+        "workflow": worker.workflow,
+        "schedule": _schedule_to_dict(worker.schedule),
+        "timeout_seconds": worker.timeout_seconds,
+        "enabled": worker.enabled,
+        "scheduler": _scheduler_to_dict(worker.scheduler),
+        "notes": worker.notes,
+    }
+
+
+def registry_to_document(registry: WorkerRegistry) -> dict[str, Any]:
+    """Serialize to the on-disk document shape (no local paths embedded)."""
+    return {
+        "version": registry.version,
+        "revision": registry.revision,
+        "updated_at": registry.updated_at,
+        "providers": [provider_to_dict(provider) for provider in registry.providers],
+        "workers": [worker_to_dict(worker) for worker in registry.workers],
+    }
+
+
+def registry_to_dict(registry: WorkerRegistry) -> dict[str, Any]:
+    """Serialize for JSON API responses (adds the resolved source path)."""
+    document = registry_to_document(registry)
+    document["source_path"] = str(registry.source_path)
+    return document
+
+
+def find_worker(registry: WorkerRegistry, worker_id: str) -> WorkerRecord | None:
+    for worker in registry.workers:
+        if worker.id == worker_id:
+            return worker
+    return None
+
+
+def find_provider(registry: WorkerRegistry, provider_id: str) -> ProviderRecord | None:
+    for provider in registry.providers:
+        if provider.id == provider_id:
+            return provider
+    return None
+
+
+def workers_for_provider(registry: WorkerRegistry, provider_id: str) -> tuple[WorkerRecord, ...]:
+    return tuple(worker for worker in registry.workers if worker.provider == provider_id)
+
+
+# ── persistence ──────────────────────────────────────────────────────────────
+
+
+def _utc_now() -> str:
+    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+
+
+def _atomic_write(path: Path, payload: str) -> None:
+    """Write *payload* to *path* atomically: temp file in the same dir, fsync, replace."""
+    parent = path.parent
+    parent.mkdir(parents=True, exist_ok=True)
+    fd, temp_path = tempfile.mkstemp(prefix=f".{path.name}-", suffix=".tmp", dir=parent)
+    try:
+        with os.fdopen(fd, "w", encoding="utf-8") as handle:
+            handle.write(payload)
+            handle.flush()
+            os.fsync(handle.fileno())
+        os.replace(temp_path, path)
+    finally:
+        if os.path.exists(temp_path):
+            try:
+                os.remove(temp_path)
+            except OSError:
+                pass
+
+
+def _revision_path(directory: Path, revision: int) -> Path:
+    return directory / f"rev-{revision:06d}.json"
+
+
+def _prune_history(path: Path) -> None:
+    directory = history_dir(path)
+    revisions = list_revisions(path)
+    excess = len(revisions) - _HISTORY_LIMIT
+    for revision in revisions[: max(0, excess)]:
+        _revision_path(directory, revision).unlink(missing_ok=True)
+
+
+def _archive_current(path: Path) -> int | None:
+    """Copy the live document into the history dir under its own revision number."""
+    if not path.exists():
+        return None
+    try:
+        existing = json.loads(path.read_text(encoding="utf-8"))
+        revision = int(existing.get("revision", 0))
+    except (json.JSONDecodeError, TypeError, ValueError, AttributeError):
+        # An unreadable live file has no trustworthy revision number to file it
+        # under, so it cannot join the history chain.
+        return None
+    if revision <= 0:
+        return None
+    _atomic_write(
+        _revision_path(history_dir(path), revision),
+        json.dumps(existing, indent=2, sort_keys=True) + "\n",
+    )
+    _prune_history(path)
+    return revision
+
+
+def list_revisions(path: Path | None = None) -> tuple[int, ...]:
+    """Revision numbers retained in history for *path*, oldest first."""
+    directory = history_dir(path)
+    if not directory.is_dir():
+        return ()
+    revisions: list[int] = []
+    for entry in directory.glob("rev-*.json"):
+        try:
+            revisions.append(int(entry.stem.split("-", 1)[1]))
+        except (IndexError, ValueError):
+            continue
+    return tuple(sorted(revisions))
+
+
+def save_registry(
+    registry: WorkerRegistry,
+    path: Path | None = None,
+    *,
+    updated_at: str | None = None,
+) -> WorkerRegistry:
+    """Validate, archive the superseded revision, then atomically persist a new one.
+
+    The stored revision is always the previous revision plus one, so a reader
+    can tell two documents apart even when their content is otherwise equal.
+    Returns the registry exactly as persisted.
+    """
+    target = (path or registry.source_path or default_registry_path()).resolve()
+
+    document = registry_to_document(registry)
+    # Re-validate before writing: a registry assembled in memory has not
+    # necessarily been through the loader.
+    validate_payload(document, source_path=target)
+
+    archived = _archive_current(target)
+    document["revision"] = (archived + 1) if archived is not None else registry.revision
+    document["updated_at"] = updated_at or _utc_now()
+
+    persisted = validate_payload(document, source_path=target)
+    _atomic_write(target, json.dumps(document, indent=2, sort_keys=True) + "\n")
+    return persisted
+
+
+def rollback_to_revision(revision: int, path: Path | None = None) -> WorkerRegistry:
+    """Restore a retained *revision* as a new head revision.
+
+    History is append-only: rolling back does not delete the revisions in
+    between, it republishes the chosen one under the next revision number, so a
+    rollback is itself reversible.
+    """
+    target = (path or default_registry_path()).resolve()
+    snapshot_path = _revision_path(history_dir(target), revision)
+    if not snapshot_path.exists():
+        available = ", ".join(str(item) for item in list_revisions(target)) or "(none)"
+        raise RegistryValidationError(
+            f"revision {revision} is not retained for {target.name}; available: {available}"
+        )
+
+    payload = json.loads(snapshot_path.read_text(encoding="utf-8"))
+    restored = validate_payload(payload, source_path=target)
+    return save_registry(restored, target)