feat(control-plane): add authoritative native MCP fleet inventory (#949)

Every pre-existing runtime surface is per-process. gitea_get_runtime_context
and gitea_assess_master_parity describe only the server answering the call,
and gitea_assess_mcp_namespace_health accepts process, probe_result and
registered_tools from the caller, so it cannot constrain the caller. The
control-plane sessions table records allocator task sessions, not server
processes. Five self-reports of one revision therefore never proved that five
processes exist, that no sixth exists, or that all five share one client
cohort.

Add gitea_assess_fleet_inventory, a strictly read-only capability that takes
no evidence parameters. It combines two sources that must agree:

- a control-plane runtime registry row each server writes about itself,
  from the official entrypoint, immediately after the native transport bind;
- a process observation the answering server performs, never the caller.

A member is running only when both agree and the observed process predates
its registration, so configuration alone never counts and a recycled PID
cannot impersonate an exited server. Classification is a pure function of the
snapshot, so gitea-controller and gitea-reconciler return the same verdict.

Missing, duplicate, unexpected, stale and unregistered members are reported
in separate fields rather than collapsed into one error, because each needs a
different operator action. single_cohort is derived only from recorded cohort
identity and stays null when unknown, so matching revisions never establish a
cohort. Any unreadable registry, unavailable listing, unregistered process,
unknown cohort or unknown revision sets inventory_complete and
mutation_gate_satisfied false with a specific blocked_reason.

The capability performs no restart, reconnect, drain, lease mutation, issue
mutation or process termination, never terminates a duplicate, and never
manufactures restart evidence. The only signal sent is signal 0.

Also resolves the fleet namespace from the expected roster:
role_namespace_gate.infer_mcp_namespace recognises only author and reviewer
and echoes the profile name otherwise, which would have mislabelled the
controller, merger and reconciler members. Widening that shared helper is
controller role-metadata work owned by #950 and is deliberately not done here.

Schema v5 to v6 is additive and idempotent: one new table, no existing table,
tool signature or result field changed. Two control-plane tests that pinned
the schema version to the literal 5 now assert against SCHEMA_VERSION.

#950 (controller role metadata), #951 (restart receipts) and #952 (stale-lease
consistency) remain separate and untouched.

Tests: 118 new across tests/test_mcp_fleet_inventory.py,
tests/test_control_plane_db_server_runtimes.py and
tests/test_fleet_inventory_tool.py, covering every acceptance criterion
including the multi-LLM duplicate-server regression that motivated the issue.

Closes #949

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01NBaQKcRRKeKbZuhk72MhEf
This commit is contained in:
2026-07-27 23:25:45 -04:00
co-authored by Claude Opus 5
parent 82d71b7702
commit 92615f474b
12 changed files with 2718 additions and 3 deletions
+164 -1
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@@ -32,7 +32,7 @@ from typing import Any, Iterator, Sequence
import dependency_graph import dependency_graph
import gitea_audit import gitea_audit
SCHEMA_VERSION = 5 SCHEMA_VERSION = 6
# Assignable work kinds only — raw monitoring incidents are never work items. # Assignable work kinds only — raw monitoring incidents are never work items.
WORK_KINDS = frozenset({"issue", "pr"}) WORK_KINDS = frozenset({"issue", "pr"})
@@ -65,6 +65,33 @@ CREATE TABLE IF NOT EXISTS sessions (
status TEXT NOT NULL DEFAULT 'active' status TEXT NOT NULL DEFAULT 'active'
); );
-- Fleet-level MCP server runtime registry (#949). Distinct from ``sessions``:
-- a session is one allocator *task*, while a row here is one *server process*
-- that bound native MCP transport. Each server writes its own row and no other,
-- so a caller can never supply this evidence. Creating the table is itself the
-- v5→v6 migration: additive, idempotent, and it touches no existing table.
CREATE TABLE IF NOT EXISTS mcp_server_runtimes (
runtime_id TEXT PRIMARY KEY,
namespace TEXT NOT NULL,
profile TEXT,
role TEXT,
remote TEXT,
org TEXT,
repo TEXT,
repository_root TEXT,
pid INTEGER NOT NULL,
cohort_id TEXT,
cohort_source TEXT,
client_provenance TEXT,
boot_id TEXT,
startup_head TEXT,
daemon_start_head TEXT,
transport TEXT,
registered_at TEXT NOT NULL,
last_heartbeat_at TEXT NOT NULL,
status TEXT NOT NULL DEFAULT 'running'
);
CREATE TABLE IF NOT EXISTS work_items ( CREATE TABLE IF NOT EXISTS work_items (
work_item_id INTEGER PRIMARY KEY AUTOINCREMENT, work_item_id INTEGER PRIMARY KEY AUTOINCREMENT,
remote TEXT NOT NULL, remote TEXT NOT NULL,
@@ -910,6 +937,142 @@ class ControlPlaneDB:
rows = conn.execute(sql, params).fetchall() rows = conn.execute(sql, params).fetchall()
return [dict(r) for r in rows] return [dict(r) for r in rows]
# ── MCP server runtime registry (#949) ────────────────────────────────
_RUNTIME_COLUMNS: tuple[str, ...] = (
"runtime_id",
"namespace",
"profile",
"role",
"remote",
"org",
"repo",
"repository_root",
"pid",
"cohort_id",
"cohort_source",
"client_provenance",
"boot_id",
"startup_head",
"daemon_start_head",
"transport",
"registered_at",
"last_heartbeat_at",
"status",
)
def register_mcp_server_runtime(
self,
record: dict[str, Any],
*,
retention_seconds: int | None = None,
now: str | None = None,
) -> dict[str, Any]:
"""Record that *this* server process is running (#949).
Only the described process ever calls this, at native transport bind.
Two housekeeping deletions happen here — on the startup write path, never
on the read path — so the registry cannot grow without bound:
* rows that recorded the **same PID**, which the calling process now
owns and which therefore cannot still be a live server;
* rows older than *retention_seconds*.
Neither can hide a live duplicate: a concurrently running server holds a
different PID and writes a fresher row.
"""
stamp = now or _ts()
row = {key: record.get(key) for key in self._RUNTIME_COLUMNS}
row["runtime_id"] = str(record.get("runtime_id") or "").strip()
if not row["runtime_id"]:
raise ValueError("runtime_id is required (fail closed)")
row["namespace"] = str(record.get("namespace") or "").strip()
if not row["namespace"]:
raise ValueError("namespace is required (fail closed)")
if record.get("pid") is None:
raise ValueError("pid is required (fail closed)")
row["pid"] = int(record["pid"])
row["registered_at"] = record.get("registered_at") or stamp
row["last_heartbeat_at"] = record.get("last_heartbeat_at") or stamp
row["status"] = record.get("status") or "running"
columns = ", ".join(self._RUNTIME_COLUMNS)
placeholders = ", ".join("?" for _ in self._RUNTIME_COLUMNS)
values = [row[key] for key in self._RUNTIME_COLUMNS]
with self._tx() as conn:
conn.execute(
"DELETE FROM mcp_server_runtimes WHERE pid = ? AND runtime_id != ?",
(row["pid"], row["runtime_id"]),
)
if retention_seconds and retention_seconds > 0:
cutoff = _ts(
_utc_now() - timedelta(seconds=int(retention_seconds))
)
conn.execute(
"DELETE FROM mcp_server_runtimes WHERE registered_at < ?",
(cutoff,),
)
conn.execute(
f"INSERT OR REPLACE INTO mcp_server_runtimes({columns}) "
f"VALUES ({placeholders})",
values,
)
stored = conn.execute(
"SELECT * FROM mcp_server_runtimes WHERE runtime_id = ?",
(row["runtime_id"],),
).fetchone()
return dict(stored)
def heartbeat_mcp_server_runtime(self, runtime_id: str) -> None:
"""Refresh a runtime row's liveness timestamp.
Never called by the inventory read path: liveness is established from
process evidence so that reading the fleet mutates nothing (#949 AC11).
"""
with self._tx() as conn:
conn.execute(
"UPDATE mcp_server_runtimes SET last_heartbeat_at = ? "
"WHERE runtime_id = ?",
(_ts(), runtime_id),
)
def mark_mcp_server_runtime_stopped(self, runtime_id: str) -> None:
"""Mark a runtime row stopped (graceful shutdown bookkeeping)."""
with self._tx() as conn:
conn.execute(
"UPDATE mcp_server_runtimes SET status = 'stopped', "
"last_heartbeat_at = ? WHERE runtime_id = ?",
(_ts(), runtime_id),
)
def list_mcp_server_runtimes(
self,
*,
statuses: Sequence[str] | None = None,
limit: int = 500,
) -> list[dict[str, Any]]:
"""List runtime registry rows, newest registration first (read-only).
Ordering is fully deterministic: ties on ``registered_at`` break on
``runtime_id`` so two callers reading one snapshot see one order.
"""
clauses: list[str] = []
params: list[Any] = []
if statuses:
placeholders = ", ".join("?" for _ in statuses)
clauses.append(f"status IN ({placeholders})")
params.extend(statuses)
where = ("WHERE " + " AND ".join(clauses)) if clauses else ""
params.append(max(1, int(limit)))
with self._tx(immediate=False) as conn:
rows = conn.execute(
f"SELECT * FROM mcp_server_runtimes {where} "
"ORDER BY registered_at DESC, runtime_id ASC LIMIT ?",
params,
).fetchall()
return [dict(r) for r in rows]
# ── work items ──────────────────────────────────────────────────────── # ── work items ────────────────────────────────────────────────────────
def upsert_work_item( def upsert_work_item(
+134
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@@ -0,0 +1,134 @@
# Authoritative MCP fleet inventory (#949)
`gitea_assess_fleet_inventory` is the read-only native capability that answers a
question no other surface could: **is exactly one server running for each
configured PRGS profile, and do they all belong to one client cohort?**
## Why the existing surfaces were not enough
| Surface | What it proves | Why it cannot prove the fleet |
| --- | --- | --- |
| `gitea_get_runtime_context` | Profile, identity, workspace binding of **the process answering the call** | Says nothing about the other four namespaces |
| `gitea_assess_master_parity` | Startup vs current vs live revision of **that same process** | Five self-reports of one revision do not establish five processes, nor the absence of a sixth |
| `gitea_assess_mcp_namespace_health` | Whether one named namespace can invoke one tool | Accepts `process`, `probe_result` and `registered_tools` **from the caller** — a capability whose inputs come from the party it constrains is not evidence |
| control-plane `sessions` table | Allocator **task** sessions | A session is a unit of work, not a server process; nothing recorded that a server exists |
Before this capability, satisfying a strict five-process/single-cohort gate
required shell process inspection, cached JSON, or source reading — none of
which are sanctioned workflow evidence.
## Evidence model
Two independent sources must agree before a member counts as running.
**1. Control-plane runtime registry** — table `mcp_server_runtimes`.
Each server writes exactly one row *about itself*, from the official entrypoint,
immediately after the native MCP transport bind. Only a transport-bound process
reaches that line, and no MCP caller can reach it at all. The row is
authoritative for identity: namespace, profile, role, repository binding,
cohort, startup revision, transport, and PID.
**2. Server-side process observation** — a process listing performed by the
server answering the inventory call, never by the caller. It is authoritative
for existence and liveness, and it is the only source that can reveal a running
server the registry does not know about.
A member is `live` only when a registry row has a matching running process whose
start time precedes the registration — so a recycled PID cannot impersonate a
server that has since exited.
### Deliberate non-inferences
* **Configuration is not existence.** A configured profile with no live
corroborated row is `missing`, never `running` (AC8).
* **Matching revisions are not a cohort.** `single_cohort` is derived only from
recorded cohort identity. Five members at one revision with an unknown cohort
yield `single_cohort: null` and a closed gate, never `true` (AC7).
* **Parent-client status is not member health.** Each member is classified from
its own evidence.
Cohort identity comes from `GITEA_MCP_CLIENT_COHORT_ID` when the client sets it,
otherwise from the parent process that launched the server. A server whose
parent has gone away (reparented to init) reports an unknown cohort rather than
guessing.
## Result shape
Top-level verdict fields:
| Field | Meaning |
| --- | --- |
| `inventory_complete` | All evidence was obtainable. False whenever anything below is unknown. |
| `incomplete_reasons` | Every distinct reason completeness failed. |
| `configured_members` | The five expected members with their instance counts and health. |
| `running_members` | Live, corroborated instances of expected profiles. |
| `missing_members` | Expected profiles with no live instance. |
| `duplicate_members` | Expected profiles with more than one live instance, with every PID. |
| `unexpected_members` | Live members outside the expected roster. Never folded into duplicates. |
| `stale_members` | Registry rows whose process is dead, unobserved, PID-recycled, or unknown. |
| `unregistered_processes` | Running MCP server processes with no registry row. |
| `repository_binding_mismatches` | Live members bound to another repository, or with an incomplete binding. |
| `role_mismatches` | Live members whose declared role or namespace contradicts the configured profile. |
| `single_cohort` / `mixed_cohort` | `true`/`false`, or `null` when cohort evidence is unknown. |
| `mixed_revision` / `startup_revisions` | Revision spread across live members. |
| `exactly_one_per_profile` | No missing and no duplicate expected members. |
| `mutation_gate_satisfied` | The full invariant held. |
| `blocked_reason` / `blocked_reasons` | Why the gate is closed; the first is the headline. |
| `mutations_performed` | Always `[]`. |
Ordering is deterministic — every list sorts by namespace, profile, PID, then
runtime id — so two callers reading one snapshot see identical structure.
## How controller and reconciler gates consume it
Classification is a **pure function of the snapshot**. The answering namespace is
reported as `answering_namespace` metadata and never affects the verdict, so
`gitea-controller` and `gitea-reconciler` return the same result for the same
fleet. Neither is privileged over the other.
Consume it like this:
1. Call `gitea_assess_fleet_inventory` from `gitea-controller` **or**
`gitea-reconciler` (any namespace holding `gitea.read` may call it).
2. If `mutation_gate_satisfied` is `true`, the exact-one-instance-per-profile,
single-cohort, single-revision invariant is proven; proceed.
3. Otherwise **stop and report `blocked_reason` verbatim**. Distinguish the
cases — they need different operator actions:
* `missing_members` — the client did not launch that namespace; reconnect it.
* `duplicate_members` — a second client or a manual launch is running that
profile; the **operator** quits the extra client. This capability never
terminates a process.
* `unexpected_members` — an unconfigured PRGS server is live; investigate
before trusting any gate.
* `unregistered_processes` — a server is running code that predates this
capability, or failed to register; the inventory is incomplete by
construction and must not be reported as healthy.
* `mixed_cohort` / `mixed_revision` — the fleet is not one coherent unit.
* `single_cohort: null` — cohort evidence is missing; this is *unknown*, not
*healthy*.
Never treat `inventory_complete: false` as a soft warning. It means the
inventory cannot describe the whole fleet, which is exactly the state the
mutation gate exists to refuse.
## Read-only guarantees
The capability performs no restart, reconnect, drain, lease mutation, issue
mutation, repository write, or process termination, and it never manufactures
historical restart evidence. The only signal it sends is `signal 0`, a
liveness/permission check that delivers nothing to the target process. Registry
writes happen exclusively on the startup path of the process being described,
never on this read path.
## Scope boundaries
This capability is observation only. Related concerns live elsewhere and are
deliberately not absorbed here:
* **#950** — controller role metadata and capability-routing consistency.
* **#951** — durable synchronization and restart receipts.
* **#952** — stale-lease inspection, dashboard, and executor consistency.
* **#900** — cohort lifecycle supervision (draining and reaping superseded
cohorts) is a *mutating* transition that would consume this evidence.
* **#948** — the client/session/generation ownership model that this evidence
feeds.
+1
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@@ -54,6 +54,7 @@ that gates each call, not which tools exist.
- `gitea_assess_already_landed_reconciliation` - `gitea_assess_already_landed_reconciliation`
- `gitea_assess_conflict_fix_classification` - `gitea_assess_conflict_fix_classification`
- `gitea_assess_conflict_fix_push` - `gitea_assess_conflict_fix_push`
- `gitea_assess_fleet_inventory`
- `gitea_assess_gitea_operation_path` - `gitea_assess_gitea_operation_path`
- `gitea_assess_master_parity` - `gitea_assess_master_parity`
- `gitea_assess_mcp_namespace_health` - `gitea_assess_mcp_namespace_health`
+182
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@@ -196,6 +196,7 @@ RECONCILER_WORKTREE_ENV = "GITEA_RECONCILER_WORKTREE"
import namespace_workspace_binding as nwb # noqa: E402 import namespace_workspace_binding as nwb # noqa: E402
import canonical_repository_root as crr # noqa: E402 # #706 cross-repo canonical root import canonical_repository_root as crr # noqa: E402 # #706 cross-repo canonical root
import mcp_namespace_health # noqa: E402 import mcp_namespace_health # noqa: E402
import mcp_fleet_inventory # noqa: E402 # #949 authoritative fleet inventory
import stale_binding_recovery # noqa: E402 import stale_binding_recovery # noqa: E402
# Worktree env bindings inherited from the parent environment at daemon boot # Worktree env bindings inherited from the parent environment at daemon boot
@@ -18811,6 +18812,116 @@ def gitea_assess_master_parity(
return out return out
def _fleet_namespace_for_profile(profile_name: str | None) -> str | None:
"""Fleet namespace for *profile_name* (#949).
``role_namespace_gate.infer_mcp_namespace`` recognises only author and
reviewer and returns the profile name for everything else, so it cannot
name the controller, merger, or reconciler namespaces. The fleet roster
carries that mapping; this defers to it and keeps the existing inference as
the fallback for profiles outside the roster. Widening the shared helper is
controller role-metadata work owned by #950.
"""
return mcp_fleet_inventory.namespace_for_profile(
profile_name,
default=role_namespace_gate.infer_mcp_namespace(profile_name),
)
@mcp.tool()
def gitea_assess_fleet_inventory(
remote: str = "dadeschools",
host: str | None = None,
org: str | None = None,
repo: str | None = None,
) -> dict:
"""Read-only: authoritative inventory of the running PRGS MCP fleet (#949).
Every other runtime surface is per-process. ``gitea_get_runtime_context``
and ``gitea_assess_master_parity`` describe only the server answering the
call; ``gitea_assess_mcp_namespace_health`` takes ``process`` and
``probe_result`` from the caller and so cannot constrain it. This tool takes
**no evidence parameters at all**: it combines the control-plane runtime
registry, which each server writes about itself at native transport bind,
with a process observation performed by this server. A member counts as
running only when both agree, so configuration alone never counts as a
running server and a caller cannot supply the answer.
Classification is a pure function of the snapshot, so ``gitea-controller``
and ``gitea-reconciler`` return the same verdict for the same fleet;
``answering_namespace`` is metadata and never changes it.
Fails closed. Any unreadable registry, unavailable process listing,
unregistered server process, unknown cohort, or unknown startup revision
sets ``inventory_complete`` false and ``mutation_gate_satisfied`` false with
a specific ``blocked_reason``. Matching Git revisions never establish a
single cohort ``single_cohort`` is derived only from recorded cohort
identity and stays ``null`` when that is unknown.
Strictly read-only: no restart, reconnect, lease mutation, issue mutation,
repository write, or process termination, and duplicates are reported and
never terminated. The only signal sent is ``signal 0`` liveness probing,
which delivers nothing to the target process. ``mutations_performed`` is
always an empty list.
Args:
remote: Known instance 'dadeschools' or 'prgs'. Declares which
repository binding fleet members are expected to carry.
host: Override the Gitea host.
org: Override the expected owner/organization binding.
repo: Override the expected repository binding.
Returns:
dict with 'inventory_complete', 'configured_members', 'running_members',
'missing_members', 'duplicate_members', 'unexpected_members',
'stale_members', 'unregistered_processes', 'single_cohort',
'mixed_cohort', 'mixed_revision', 'exactly_one_per_profile',
'mutation_gate_satisfied', 'blocked_reason', and per-member evidence.
"""
read_block = _profile_operation_gate("gitea.read")
if read_block:
return {
"success": False,
"read_only": True,
"inventory_complete": False,
"mutation_gate_satisfied": False,
"blocked_reason": "the active profile may not read control-plane state",
"reasons": read_block,
"permission_report": _permission_block_report("gitea.read"),
"mutations_performed": [],
}
ctx = session_ctx.get_session_context() or {}
expected_binding = {
"remote": remote or ctx.get("remote"),
"org": org or ctx.get("org"),
"repo": repo or ctx.get("repository"),
}
db, db_errors = _control_plane_db_or_error()
runtime_rows: list[dict] = []
registry_error: str | None = None
if db is None:
registry_error = "; ".join(db_errors) or "control-plane DB unavailable"
else:
try:
runtime_rows = db.list_mcp_server_runtimes(statuses=("running",))
except Exception as exc: # noqa: BLE001 - unreadable registry is unknown evidence
registry_error = f"runtime registry could not be read: {_redact(str(exc))}"
result = mcp_fleet_inventory.classify_fleet_inventory(
runtime_rows=runtime_rows,
process_scan=mcp_fleet_inventory.scan_mcp_server_processes(),
expected_binding=expected_binding,
registry_available=registry_error is None,
registry_error=registry_error,
answering_namespace=_fleet_namespace_for_profile(_active_profile_name(host)),
)
result["expected_repository_binding"] = expected_binding
result["summary"] = mcp_fleet_inventory.summarize(result)
return result
# #781: documented in the canonical review workflow as a tool reviewers call # #781: documented in the canonical review workflow as a tool reviewers call
# before workflow load, but the registration decorator had been lost, so the # before workflow load, but the registration decorator had been lost, so the
# documented inventory named something no namespace could reach. # documented inventory named something no namespace could reach.
@@ -24344,6 +24455,72 @@ def gitea_quarantine_contaminated_review(
} }
def _register_fleet_runtime(transport: str = "stdio") -> dict | None:
"""Record this server process in the control-plane runtime registry (#949).
Called once from the official entrypoint immediately after the native
transport bind, so the row can only ever describe the process writing it.
This is the evidence ``gitea_assess_fleet_inventory`` reads; without it the
fleet is unprovable, but a failure here must never prevent the server from
serving, so every error is swallowed after being logged to stderr.
"""
try:
profile_name = gitea_config.selected_profile_name()
try:
profile = get_profile()
except Exception: # noqa: BLE001 - identity resolution must not block boot
profile = {}
allowed = (profile or {}).get("allowed_operations") or []
forbidden = (profile or {}).get("forbidden_operations") or []
role = _role_kind(allowed, forbidden) if allowed else None
ctx = session_ctx.get_session_context() or {}
env = os.environ
provenance = (
"client_managed"
if (
(env.get("GITEA_CLIENT_MANAGED") or "").strip().lower()
in {"1", "true", "yes", "client_managed"}
or (env.get("GITEA_MCP_CLIENT_MANAGED") or "").strip().lower()
in {"1", "true", "yes", "client_managed"}
or (env.get("GITEA_SERVER_PROVENANCE") or "").strip()
== "client_managed"
)
else "manual_launch"
)
record = mcp_fleet_inventory.build_process_runtime_record(
namespace=_fleet_namespace_for_profile(profile_name),
profile=profile_name,
role=role,
remote=ctx.get("remote"),
org=ctx.get("org"),
repo=ctx.get("repository"),
repository_root=PROJECT_ROOT,
startup_head=_process_boot_head_sha,
daemon_start_head=_process_boot_head_sha,
transport=transport,
client_provenance=provenance,
env=env,
)
db, errors = _control_plane_db_or_error()
if db is None:
sys.stderr.write(
f"--- fleet runtime registration skipped: {'; '.join(errors)} ---\n"
)
return None
db.register_mcp_server_runtime(
record,
retention_seconds=mcp_fleet_inventory.RUNTIME_RETENTION_SECONDS,
)
sys.stderr.write(
f"--- fleet runtime registered: {record['runtime_id']} "
f"(cohort {record['cohort_id']}) ---\n"
)
return record
except Exception as exc: # noqa: BLE001 - never block startup
sys.stderr.write(f"--- fleet runtime registration failed: {exc} ---\n")
return None
# ── Entry point ─────────────────────────────────────────────────────────────── # ── Entry point ───────────────────────────────────────────────────────────────
if __name__ == "__main__": if __name__ == "__main__":
@@ -24353,6 +24530,11 @@ if __name__ == "__main__":
# native transport; offline imports / standalone scripts fail closed. # native transport; offline imports / standalone scripts fail closed.
mcp_daemon_guard.mark_sanctioned_daemon() mcp_daemon_guard.mark_sanctioned_daemon()
mcp_daemon_guard.bind_native_mcp_transport(transport="stdio") mcp_daemon_guard.bind_native_mcp_transport(transport="stdio")
# #949: record this process in the control-plane runtime registry. Only a
# transport-bound server reaches this point, so the row is authoritative
# evidence that this namespace is actually running — evidence no caller of
# gitea_assess_fleet_inventory can supply.
_register_fleet_runtime(transport="stdio")
# Lock this session's launch profile into the environment so child CLI # Lock this session's launch profile into the environment so child CLI
# processes (e.g. review_pr.py) can detect and refuse profile # processes (e.g. review_pr.py) can detect and refuse profile
# side-channel overrides (#199). # side-channel overrides (#199).
+785
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@@ -0,0 +1,785 @@
"""Authoritative, read-only PRGS MCP fleet inventory (#949).
Every pre-existing runtime surface is *per process*. ``gitea_get_runtime_context``
and ``gitea_assess_master_parity`` describe only the server answering the call.
``gitea_assess_mcp_namespace_health`` accepts ``process``, ``probe_result`` and
``registered_tools`` **from the caller**, so it cannot constrain the caller. The
control-plane ``sessions`` table records allocator *task* sessions, not server
processes. Five independent self-reports of the same revision therefore never
proved that exactly five processes exist, that no sixth exists, or that all five
belong to one client cohort.
Evidence model
--------------
Two independent sources must agree before a fleet member counts as running:
``control-plane runtime registry``
A row each server writes **about itself** at native transport bind
(:func:`build_process_runtime_record`). No caller can supply it. It is
authoritative for identity: namespace, profile, role, repository binding,
cohort, and the revision the process started at.
``server-side process observation``
A process listing performed by the server answering the inventory call
(:func:`scan_mcp_server_processes`), never by the caller. It is
authoritative for existence and liveness, and it is the only source that
can show a process the registry does not know about.
A member is ``live`` only when a registry row has a matching, still-running
process whose start time precedes the registration (so a recycled PID cannot
impersonate a dead server). Anything the two sources cannot jointly establish
is reported as unknown and fails the mutation gate closed — configuration alone
never counts as a running member, and matching Git revisions never establish a
single cohort.
This module performs no restart, reconnect, lease mutation, issue mutation, or
process termination. The only signal it ever sends is ``signal 0`` liveness
probing, which delivers nothing to the target process.
"""
from __future__ import annotations
import os
import secrets
import subprocess
from datetime import datetime, timezone
from typing import Any, Iterable, Mapping, Sequence
# ── expected fleet ────────────────────────────────────────────────────────────
# The configured PRGS fleet. Each entry is one expected member; the roster is
# the definition of "expected" for missing/unexpected classification.
EXPECTED_PRGS_FLEET: tuple[dict[str, str], ...] = (
{"namespace": "gitea-author", "profile": "prgs-author", "role": "author"},
{
"namespace": "gitea-controller",
"profile": "prgs-controller",
"role": "controller",
},
{"namespace": "gitea-reviewer", "profile": "prgs-reviewer", "role": "reviewer"},
{"namespace": "gitea-merger", "profile": "prgs-merger", "role": "merger"},
{
"namespace": "gitea-reconciler",
"profile": "prgs-reconciler",
"role": "reconciler",
},
)
# Cohort identity supplied by a client that manages the whole fleet.
COHORT_ID_ENV = "GITEA_MCP_CLIENT_COHORT_ID"
# Registry rows older than this are pruned at *registration* time (a startup
# write), never on the read path. Dead rows inside the window are still reported
# as stale evidence rather than silently dropped.
RUNTIME_RETENTION_SECONDS = 7 * 24 * 3600
# Liveness classifications for a registry row.
LIVENESS_LIVE = "live"
LIVENESS_DEAD = "dead"
LIVENESS_PID_RECYCLED = "pid_recycled"
LIVENESS_UNOBSERVED = "unobserved"
LIVENESS_UNKNOWN = "unknown"
# Per-member health classifications.
HEALTH_RUNNING = "running"
HEALTH_MISSING = "missing"
HEALTH_DUPLICATE = "duplicate"
HEALTH_UNEXPECTED = "unexpected"
HEALTH_STALE = "stale"
HEALTH_UNKNOWN = "unknown"
EVIDENCE_AUTHORITY = "control_plane_runtime_registry+server_process_observation"
_MCP_PROCESS_MARKER = "mcp_server.py"
_LSTART_FORMAT = "%a %b %d %H:%M:%S %Y"
_ISO_FORMAT = "%Y-%m-%dT%H:%M:%SZ"
# ── time helpers ──────────────────────────────────────────────────────────────
def _utcnow() -> datetime:
return datetime.now(timezone.utc)
def iso_now() -> str:
return _utcnow().strftime(_ISO_FORMAT)
def _parse_iso(value: Any) -> datetime | None:
text = (str(value) if value is not None else "").strip()
if not text:
return None
if text.endswith("Z"):
text = text[:-1] + "+00:00"
try:
parsed = datetime.fromisoformat(text)
except ValueError:
return None
if parsed.tzinfo is None:
parsed = parsed.replace(tzinfo=timezone.utc)
return parsed.astimezone(timezone.utc)
def _int_or_none(value: Any) -> int | None:
try:
return int(value)
except (TypeError, ValueError):
return None
def _clean(value: Any) -> str | None:
text = (str(value) if value is not None else "").strip()
return text or None
# ── process-level evidence (server side only) ─────────────────────────────────
def probe_pid_alive(pid: int | None) -> bool | None:
"""Return whether *pid* exists. ``None`` when it cannot be determined.
Uses ``signal 0``, which performs a permission/existence check and delivers
nothing to the target. This module never sends a terminating signal.
"""
resolved = _int_or_none(pid)
if resolved is None or resolved <= 0:
return None
try:
os.kill(resolved, 0)
except ProcessLookupError:
return False
except PermissionError:
# The process exists but belongs to another user.
return True
except OSError:
return None
return True
def scan_mcp_server_processes(*, runner=subprocess.run) -> dict[str, Any]:
"""Observe running Gitea MCP server processes from this server process.
This is deliberately performed by the answering server, never by the caller:
a caller-supplied process list is exactly the input a fleet gate must not
trust. When the listing cannot be obtained the result reports
``available=False`` so the inventory fails closed instead of assuming that
no unregistered process exists.
"""
try:
proc = runner(
["ps", "-o", "pid,lstart,command", "-ax"],
capture_output=True,
text=True,
check=True,
)
except Exception as exc: # noqa: BLE001 - any failure means unknown evidence
return {
"available": False,
"processes": [],
"reason": f"process listing unavailable: {exc}",
}
processes: list[dict[str, Any]] = []
for raw_line in (proc.stdout or "").splitlines()[1:]:
line = raw_line.strip()
if not line or _MCP_PROCESS_MARKER not in line:
continue
parts = line.split(None, 6)
if len(parts) < 7:
continue
pid = _int_or_none(parts[0])
if pid is None:
continue
try:
naive = datetime.strptime(" ".join(parts[1:6]), _LSTART_FORMAT)
started_at = naive.astimezone(timezone.utc)
except (ValueError, OSError):
started_at = None
processes.append(
{
"pid": pid,
"started_at": started_at.strftime(_ISO_FORMAT) if started_at else None,
"command": parts[6],
}
)
processes.sort(key=lambda item: item["pid"])
return {"available": True, "processes": processes, "reason": None}
# ── cohort / registration record ──────────────────────────────────────────────
def namespace_for_profile(profile: str | None, *, default: str | None = None) -> str | None:
"""Map a configured profile to its fleet namespace.
Resolved from the expected roster rather than from name-shape heuristics.
``role_namespace_gate.infer_mcp_namespace`` only recognises author and
reviewer, so it returns the *profile* name for controller, merger, and
reconciler — which would label three of the five members with a namespace
that does not exist. Widening that helper is controller role-metadata work
and belongs to #950; the roster already carries the mapping this inventory
needs, so it is read from there.
A profile outside the roster falls back to *default* (typically the
caller's existing inference), so an unexpected member is still described
rather than dropped.
"""
cleaned = _clean(profile)
for entry in EXPECTED_PRGS_FLEET:
if entry["profile"] == cleaned:
return entry["namespace"]
return default if default is not None else cleaned
def derive_cohort_identity(env: Mapping[str, str] | None = None) -> dict[str, Any]:
"""Derive the client/cohort identity of this server process.
A cohort is the set of servers a single client launched together. The
parent process is the durable expression of that: an IDE/CLI client spawns
every namespace as its own child. A process whose parent has gone away
(reparented to init) cannot prove which cohort it belongs to, and says so
rather than guessing.
Revisions are deliberately not consulted here. Two servers built from the
same commit are not thereby one cohort (#949 AC7).
"""
source_env = os.environ if env is None else env
explicit = _clean(source_env.get(COHORT_ID_ENV))
if explicit:
return {"cohort_id": explicit, "cohort_source": "explicit_env"}
try:
ppid = os.getppid()
except OSError:
ppid = 0
if ppid and ppid > 1:
return {"cohort_id": f"ppid:{ppid}", "cohort_source": "parent_process"}
return {
"cohort_id": None,
"cohort_source": "unknown",
"cohort_reason": (
"parent process is unavailable or reparented to init; this server "
"cannot prove which client cohort launched it"
),
}
def build_process_runtime_record(
*,
namespace: str,
profile: str | None,
role: str | None,
remote: str | None = None,
org: str | None = None,
repo: str | None = None,
repository_root: str | None = None,
pid: int | None = None,
startup_head: str | None = None,
daemon_start_head: str | None = None,
transport: str | None = None,
client_provenance: str | None = None,
env: Mapping[str, str] | None = None,
boot_id: str | None = None,
registered_at: str | None = None,
) -> dict[str, Any]:
"""Build the row a server writes about itself at native transport bind.
Every field describes the *calling* process. Nothing here is caller-supplied
in the MCP sense: the only code that reaches this function is the official
entrypoint of the process being described.
"""
cohort = derive_cohort_identity(env)
resolved_pid = _int_or_none(pid)
if resolved_pid is None:
resolved_pid = os.getpid()
token = boot_id or secrets.token_hex(8)
return {
"runtime_id": f"{namespace}:{resolved_pid}:{token}",
"namespace": namespace,
"profile": _clean(profile),
"role": _clean(role),
"remote": _clean(remote),
"org": _clean(org),
"repo": _clean(repo),
"repository_root": _clean(repository_root),
"pid": resolved_pid,
"cohort_id": cohort["cohort_id"],
"cohort_source": cohort["cohort_source"],
"client_provenance": _clean(client_provenance) or "unknown",
"boot_id": token,
"startup_head": _clean(startup_head),
"daemon_start_head": _clean(daemon_start_head),
"transport": _clean(transport),
"registered_at": registered_at or iso_now(),
"status": "running",
}
# ── classification ────────────────────────────────────────────────────────────
def _expected_index(
expected_fleet: Sequence[Mapping[str, str]],
) -> dict[str, dict[str, str]]:
index: dict[str, dict[str, str]] = {}
for entry in expected_fleet:
profile = _clean(entry.get("profile"))
if profile:
index[profile] = dict(entry)
return index
def _sort_key(member: Mapping[str, Any]) -> tuple:
return (
str(member.get("namespace") or ""),
str(member.get("profile") or ""),
_int_or_none(member.get("pid")) or 0,
str(member.get("runtime_id") or ""),
)
def _normalize_row(
row: Mapping[str, Any],
*,
observed_by_pid: Mapping[int, Mapping[str, Any]],
process_scan_available: bool,
now: datetime,
) -> dict[str, Any]:
pid = _int_or_none(row.get("pid"))
member: dict[str, Any] = {
"runtime_id": _clean(row.get("runtime_id")),
"namespace": _clean(row.get("namespace")),
"profile": _clean(row.get("profile")),
"role": _clean(row.get("role")),
"remote": _clean(row.get("remote")),
"org": _clean(row.get("org")),
"repo": _clean(row.get("repo")),
"repository_root": _clean(row.get("repository_root")),
"pid": pid,
"cohort_id": _clean(row.get("cohort_id")),
"cohort_source": _clean(row.get("cohort_source")) or "unknown",
"client_provenance": _clean(row.get("client_provenance")) or "unknown",
"boot_id": _clean(row.get("boot_id")),
"startup_head": _clean(row.get("startup_head")),
"daemon_start_head": _clean(row.get("daemon_start_head")),
"transport": _clean(row.get("transport")),
"registered_at": _clean(row.get("registered_at")),
"last_heartbeat_at": _clean(row.get("last_heartbeat_at")),
"recorded_status": _clean(row.get("status")) or "unknown",
}
pid_alive = probe_pid_alive(pid)
member["pid_alive"] = pid_alive
observed = observed_by_pid.get(pid) if pid is not None else None
member["process_observed"] = bool(observed) if process_scan_available else None
if not process_scan_available:
# Existence cannot be corroborated; never upgrade to live on the
# registry's word alone.
member["liveness"] = LIVENESS_UNKNOWN
member["liveness_reason"] = (
"process observation unavailable; registry rows cannot be corroborated"
)
elif pid_alive is False:
member["liveness"] = LIVENESS_DEAD
member["liveness_reason"] = "recorded PID is not running"
elif pid_alive is None:
member["liveness"] = LIVENESS_UNKNOWN
member["liveness_reason"] = "PID liveness could not be determined"
elif observed is None:
member["liveness"] = LIVENESS_UNOBSERVED
member["liveness_reason"] = (
"recorded PID is not a running Gitea MCP server process"
)
else:
started_at = _parse_iso(observed.get("started_at"))
registered_at = _parse_iso(member["registered_at"])
if started_at and registered_at and started_at > registered_at:
member["liveness"] = LIVENESS_PID_RECYCLED
member["liveness_reason"] = (
"the process now holding this PID started after the registry row "
"was written; the registered server is gone"
)
else:
member["liveness"] = LIVENESS_LIVE
member["liveness_reason"] = None
heartbeat = _parse_iso(member["last_heartbeat_at"])
member["heartbeat_age_seconds"] = (
int((now - heartbeat).total_seconds()) if heartbeat else None
)
return member
def _binding_matches(
member: Mapping[str, Any], expected_binding: Mapping[str, Any] | None
) -> bool | None:
if not expected_binding:
return None
for field in ("remote", "org", "repo"):
expected = _clean(expected_binding.get(field))
if expected is None:
continue
actual = _clean(member.get(field))
if actual is None:
return None
if actual != expected:
return False
return True
def classify_fleet_inventory(
*,
runtime_rows: Iterable[Mapping[str, Any]],
process_scan: Mapping[str, Any] | None = None,
expected_fleet: Sequence[Mapping[str, str]] = EXPECTED_PRGS_FLEET,
expected_binding: Mapping[str, Any] | None = None,
registry_available: bool = True,
registry_error: str | None = None,
now: datetime | None = None,
answering_namespace: str | None = None,
) -> dict[str, Any]:
"""Classify a fleet snapshot. Pure: identical input yields identical output.
The verdict never depends on which namespace asked, so controller and
reconciler agree by construction; ``answering_namespace`` is reported as
metadata only.
"""
moment = now or _utcnow()
scan = dict(process_scan or {"available": False, "processes": [], "reason": None})
scan_available = bool(scan.get("available"))
observed_processes = list(scan.get("processes") or [])
observed_by_pid: dict[int, Mapping[str, Any]] = {}
for proc in observed_processes:
observed_pid = _int_or_none(proc.get("pid"))
if observed_pid is not None:
observed_by_pid[observed_pid] = proc
expected_index = _expected_index(expected_fleet)
members = [
_normalize_row(
row,
observed_by_pid=observed_by_pid,
process_scan_available=scan_available,
now=moment,
)
for row in (runtime_rows or [])
]
live = [m for m in members if m["liveness"] == LIVENESS_LIVE]
not_live = [m for m in members if m["liveness"] != LIVENESS_LIVE]
live_by_profile: dict[str, list[dict[str, Any]]] = {}
for member in live:
live_by_profile.setdefault(member["profile"] or "", []).append(member)
running_members: list[dict[str, Any]] = []
missing_members: list[dict[str, Any]] = []
duplicate_members: list[dict[str, Any]] = []
unexpected_members: list[dict[str, Any]] = []
binding_mismatches: list[dict[str, Any]] = []
role_mismatches: list[dict[str, Any]] = []
configured_members: list[dict[str, Any]] = []
for entry in expected_fleet:
profile = _clean(entry.get("profile")) or ""
instances = sorted(live_by_profile.get(profile, []), key=_sort_key)
configured_members.append(
{
"namespace": _clean(entry.get("namespace")),
"profile": profile,
"role": _clean(entry.get("role")),
"instance_count": len(instances),
"health": (
HEALTH_MISSING
if not instances
else HEALTH_RUNNING
if len(instances) == 1
else HEALTH_DUPLICATE
),
}
)
if not instances:
missing_members.append(
{
"namespace": _clean(entry.get("namespace")),
"profile": profile,
"role": _clean(entry.get("role")),
"health": HEALTH_MISSING,
"reason": (
"no live registry row corroborated by a running server "
"process"
),
}
)
continue
for instance in instances:
instance["health"] = (
HEALTH_RUNNING if len(instances) == 1 else HEALTH_DUPLICATE
)
instance["expected"] = True
running_members.append(instance)
if len(instances) > 1:
duplicate_members.append(
{
"namespace": _clean(entry.get("namespace")),
"profile": profile,
"role": _clean(entry.get("role")),
"health": HEALTH_DUPLICATE,
"instance_count": len(instances),
"pids": sorted(
i["pid"] for i in instances if i["pid"] is not None
),
"instances": instances,
"reason": (
"more than one live server is registered for this profile"
),
}
)
for member in sorted(live, key=_sort_key):
profile = member["profile"] or ""
expected_entry = expected_index.get(profile)
if expected_entry is not None:
expected_role = _clean(expected_entry.get("role"))
actual_role = member["role"]
if expected_role and actual_role and actual_role != expected_role:
role_mismatches.append(
{
"namespace": member["namespace"],
"profile": profile,
"pid": member["pid"],
"expected_role": expected_role,
"declared_role": actual_role,
"reason": "declared role does not match the configured profile",
}
)
expected_namespace = _clean(expected_entry.get("namespace"))
if (
expected_namespace
and member["namespace"]
and member["namespace"] != expected_namespace
):
role_mismatches.append(
{
"namespace": member["namespace"],
"profile": profile,
"pid": member["pid"],
"expected_namespace": expected_namespace,
"declared_role": member["role"],
"reason": (
"profile is served from a namespace it is not "
"configured for"
),
}
)
else:
member["health"] = HEALTH_UNEXPECTED
member["expected"] = False
unexpected_members.append(member)
match = _binding_matches(member, expected_binding)
member["repository_binding_matches"] = match
if match is False:
binding_mismatches.append(
{
"namespace": member["namespace"],
"profile": profile,
"pid": member["pid"],
"remote": member["remote"],
"org": member["org"],
"repo": member["repo"],
"expected": dict(expected_binding or {}),
"reason": "member is bound to a different repository",
}
)
elif match is None and expected_binding:
binding_mismatches.append(
{
"namespace": member["namespace"],
"profile": profile,
"pid": member["pid"],
"remote": member["remote"],
"org": member["org"],
"repo": member["repo"],
"expected": dict(expected_binding or {}),
"reason": "member did not record a complete repository binding",
}
)
stale_members: list[dict[str, Any]] = []
for member in sorted(not_live, key=_sort_key):
member["health"] = (
HEALTH_UNKNOWN if member["liveness"] == LIVENESS_UNKNOWN else HEALTH_STALE
)
stale_members.append(member)
registered_pids = {m["pid"] for m in live if m["pid"] is not None}
unregistered_processes: list[dict[str, Any]] = []
if scan_available:
for proc in observed_processes:
observed_pid = _int_or_none(proc.get("pid"))
if observed_pid is None or observed_pid in registered_pids:
continue
unregistered_processes.append(
{"pid": observed_pid, "started_at": proc.get("started_at")}
)
unregistered_processes.sort(key=lambda item: item["pid"])
# Cohort. Derived only from recorded cohort identity — never from revisions.
cohort_ids = {m["cohort_id"] for m in live}
cohort_unknown = any(cohort_id is None for cohort_id in cohort_ids)
known_cohorts = sorted(c for c in cohort_ids if c is not None)
if not live or cohort_unknown:
single_cohort: bool | None = None
mixed_cohort: bool | None = None
else:
single_cohort = len(known_cohorts) == 1
mixed_cohort = len(known_cohorts) > 1
# Revision spread. Reported independently of cohort; never used to infer it.
heads = {m["startup_head"] for m in live}
head_unknown = any(head is None for head in heads)
known_heads = sorted(h for h in heads if h is not None)
mixed_revision = (len(known_heads) > 1) if known_heads else None
exactly_one_per_profile = not missing_members and not duplicate_members
no_unexpected_members = not unexpected_members
incomplete_reasons: list[str] = []
if not registry_available:
incomplete_reasons.append(
registry_error or "the control-plane runtime registry could not be read"
)
if not scan_available:
incomplete_reasons.append(
str(scan.get("reason") or "server-side process observation unavailable")
)
if unregistered_processes:
pids = ", ".join(str(p["pid"]) for p in unregistered_processes)
incomplete_reasons.append(
f"running Gitea MCP server process(es) with no runtime registry row "
f"(PIDs: {pids}); the fleet contains members this inventory cannot "
f"describe"
)
if live and cohort_unknown:
incomplete_reasons.append(
"one or more live members did not record a client cohort identity; "
"matching revisions do not establish a single cohort"
)
if live and head_unknown:
incomplete_reasons.append(
"one or more live members did not record a startup revision"
)
if any(m["liveness"] == LIVENESS_UNKNOWN for m in members):
incomplete_reasons.append(
"liveness of one or more registry rows could not be determined"
)
inventory_complete = not incomplete_reasons
blocked_reasons: list[str] = list(incomplete_reasons)
if missing_members:
names = ", ".join(sorted(m["profile"] for m in missing_members))
blocked_reasons.append(f"expected fleet member(s) not running: {names}")
if duplicate_members:
names = ", ".join(sorted(d["profile"] for d in duplicate_members))
blocked_reasons.append(
f"duplicate server(s) registered for profile(s): {names}"
)
if unexpected_members:
names = ", ".join(
sorted(
str(m["profile"] or m["namespace"] or "?") for m in unexpected_members
)
)
blocked_reasons.append(f"unexpected fleet member(s) running: {names}")
if mixed_cohort:
blocked_reasons.append(
"live members span more than one client cohort: "
+ ", ".join(known_cohorts)
)
if mixed_revision:
blocked_reasons.append(
"live members started at different revisions: " + ", ".join(known_heads)
)
if binding_mismatches:
blocked_reasons.append(
"one or more live members are not bound to the expected repository"
)
if role_mismatches:
blocked_reasons.append(
"one or more live members declare a role or namespace that does not "
"match the configured profile"
)
mutation_gate_satisfied = bool(
inventory_complete
and exactly_one_per_profile
and no_unexpected_members
and single_cohort is True
and mixed_revision is False
and not binding_mismatches
and not role_mismatches
)
if not mutation_gate_satisfied and not blocked_reasons:
blocked_reasons.append(
"the fleet snapshot did not establish the exact-one-instance-per-"
"profile, single-cohort invariant"
)
return {
"success": True,
"read_only": True,
"evidence_authority": EVIDENCE_AUTHORITY,
"answering_namespace": _clean(answering_namespace),
"generated_at": moment.strftime(_ISO_FORMAT),
"inventory_complete": inventory_complete,
"incomplete_reasons": incomplete_reasons,
"configured_members": configured_members,
"running_members": sorted(running_members, key=_sort_key),
"missing_members": sorted(missing_members, key=_sort_key),
"duplicate_members": sorted(duplicate_members, key=_sort_key),
"unexpected_members": sorted(unexpected_members, key=_sort_key),
"stale_members": stale_members,
"unregistered_processes": unregistered_processes,
"repository_binding_mismatches": sorted(binding_mismatches, key=_sort_key),
"role_mismatches": sorted(role_mismatches, key=_sort_key),
"cohort_ids": known_cohorts,
"single_cohort": single_cohort,
"mixed_cohort": mixed_cohort,
"startup_revisions": known_heads,
"mixed_revision": mixed_revision,
"exactly_one_per_profile": exactly_one_per_profile,
"no_unexpected_members": no_unexpected_members,
"expected_member_count": len(expected_fleet),
"running_member_count": len(running_members),
"mutation_gate_satisfied": mutation_gate_satisfied,
"blocked_reason": blocked_reasons[0] if blocked_reasons else None,
"blocked_reasons": blocked_reasons,
"process_observation": {
"available": scan_available,
"observed_process_count": len(observed_processes),
"reason": scan.get("reason"),
},
"registry": {
"available": registry_available,
"row_count": len(members),
"error": registry_error,
},
"mutations_performed": [],
}
def summarize(result: Mapping[str, Any]) -> str:
"""One-line human summary of a classification result."""
if result.get("mutation_gate_satisfied"):
return (
f"fleet healthy: {result.get('running_member_count')} of "
f"{result.get('expected_member_count')} members running in a single "
f"cohort at one revision"
)
return f"fleet not provable: {result.get('blocked_reason')}"
+1
View File
@@ -40,6 +40,7 @@ NON_TOOL_IDENTIFIERS: frozenset[str] = frozenset(
"gitea_auth", "gitea_auth",
"gitea_config", "gitea_config",
"gitea_mcp_server", "gitea_mcp_server",
"mcp_fleet_inventory",
"mcp_server", "mcp_server",
"offline_mcp_helper", "offline_mcp_helper",
"offline_mcp_runner", "offline_mcp_runner",
+25
View File
@@ -252,6 +252,31 @@ Helpers: `scripts/worktree-start`, `scripts/worktree-review`,
- Never place raw tokens in LLM/MCP config. - Never place raw tokens in LLM/MCP config.
- Use `gitea_whoami` and `gitea_resolve_task_capability` before mutating. - Use `gitea_whoami` and `gitea_resolve_task_capability` before mutating.
## Fleet inventory
`gitea_whoami`, `gitea_get_runtime_context` and `gitea_assess_master_parity` each
describe only the server answering the call. Five namespaces independently
reporting the same revision never proved that five processes exist, that no sixth
exists, or that all five belong to one client cohort.
`gitea_assess_fleet_inventory` is the read-only capability that does prove it. It
takes no evidence parameters: it combines the control-plane runtime registry,
which each server writes about itself at native transport bind, with a process
observation the answering server performs. Classification is a pure function of
that snapshot, so `gitea-controller` and `gitea-reconciler` return the same
verdict for the same fleet.
Consume `mutation_gate_satisfied`. When it is false, report `blocked_reason`
verbatim and stop — `missing_members`, `duplicate_members`, `unexpected_members`,
`unregistered_processes`, `mixed_cohort` and `mixed_revision` are reported
separately because each needs a different operator action. Treat
`inventory_complete: false` and `single_cohort: null` as *unknown*, never as
healthy. The capability never terminates a duplicate process, restarts,
reconnects, or touches a lease.
Details, field meanings, and the gate-consumption sequence:
[`docs/mcp-fleet-inventory.md`](../../docs/mcp-fleet-inventory.md) (#949).
## Tool inventory ## Tool inventory
[`docs/mcp-tool-inventory.md`](../../docs/mcp-tool-inventory.md) is the canonical [`docs/mcp-tool-inventory.md`](../../docs/mcp-tool-inventory.md) is the canonical
+13
View File
@@ -159,6 +159,19 @@ TASK_CAPABILITY_MAP: dict[str, dict[str, str]] = {
"permission": "gitea.read", "permission": "gitea.read",
"role": "reconciler", "role": "reconciler",
}, },
# #949: fleet inventory is strictly read-only evidence. It is deliberately
# not role-exclusive — the controller and reconciler gates are its named
# consumers, but any namespace holding gitea.read must be able to prove the
# exact-five-process/single-cohort invariant before it acts, and the verdict
# is a pure function of the snapshot so every namespace agrees.
"assess_fleet_inventory": {
"permission": "gitea.read",
"role": "reconciler",
},
"gitea_assess_fleet_inventory": {
"permission": "gitea.read",
"role": "reconciler",
},
# PR synchronization lifecycle: assess is read-only (any role with gitea.read); # PR synchronization lifecycle: assess is read-only (any role with gitea.read);
# update-by-merge is author-only and mutates the PR head via Gitea API. # update-by-merge is author-only and mutates the PR head via Gitea API.
"assess_pr_sync_status": { "assess_pr_sync_status": {
+6 -2
View File
@@ -14,6 +14,7 @@ from control_plane_db import (
ControlPlaneError, ControlPlaneError,
InvalidWorkKindError, InvalidWorkKindError,
LeaseRequiredError, LeaseRequiredError,
SCHEMA_VERSION,
WORK_KINDS, WORK_KINDS,
_ts, _ts,
_utc_now, _utc_now,
@@ -37,7 +38,10 @@ class ControlPlaneDBTest(unittest.TestCase):
rows = dict(conn.execute("SELECT key, value FROM schema_meta").fetchall()) rows = dict(conn.execute("SELECT key, value FROM schema_meta").fetchall())
finally: finally:
conn.close() conn.close()
self.assertEqual(rows["schema_version"], "5") # Pinned to the constant, not a literal: every additive migration bumps
# SCHEMA_VERSION, and the invariant under test is that the meta row
# records the version the code actually wrote (#949 added v6).
self.assertEqual(rows["schema_version"], str(SCHEMA_VERSION))
self.assertIn("DB coordinates", rows["architecture"]) self.assertIn("DB coordinates", rows["architecture"])
self.assertIn("bridge", rows["architecture"].lower()) self.assertIn("bridge", rows["architecture"].lower())
@@ -868,7 +872,7 @@ class SessionCheckpointTest(unittest.TestCase):
conn.close() conn.close()
self.assertIn("session_checkpoints", names) self.assertIn("session_checkpoints", names)
record = self._write() record = self._write()
self.assertEqual(record["checkpoint_schema_version"], 5) self.assertEqual(record["checkpoint_schema_version"], SCHEMA_VERSION)
# AC2 — checkpoints written for multi-role session fixtures. # AC2 — checkpoints written for multi-role session fixtures.
def test_multi_role_fixtures_each_get_a_row(self) -> None: def test_multi_role_fixtures_each_get_a_row(self) -> None:
@@ -0,0 +1,282 @@
"""Control-plane MCP server runtime registry (#949).
The registry is the half of the fleet evidence a caller cannot supply: each
server writes exactly one row about itself at native transport bind. These tests
pin the storage contract additive migration, deterministic ordering, and
PID-reuse/retention pruning that cannot hide a live duplicate.
"""
import os
import tempfile
import unittest
from datetime import datetime, timedelta, timezone
from unittest import mock
import control_plane_db
import mcp_fleet_inventory as mfi
def _stamp(delta_seconds=0):
moment = datetime.now(timezone.utc) + timedelta(seconds=delta_seconds)
return moment.replace(microsecond=0).strftime("%Y-%m-%dT%H:%M:%SZ")
class _DBCase(unittest.TestCase):
def setUp(self):
self._tmp = tempfile.TemporaryDirectory()
self.addCleanup(self._tmp.cleanup)
self.db_path = os.path.join(self._tmp.name, "control_plane.sqlite3")
self.db = control_plane_db.ControlPlaneDB(db_path=self.db_path)
def record(self, namespace, profile, role, pid, **overrides):
base = mfi.build_process_runtime_record(
namespace=namespace,
profile=profile,
role=role,
remote="prgs",
org="Scaled-Tech-Consulting",
repo="Gitea-Tools",
repository_root="/checkout/Gitea-Tools",
pid=pid,
startup_head="82d71b77028a7abd4f8ab4a4e4d89658a187f73d",
transport="stdio",
client_provenance="client_managed",
env={mfi.COHORT_ID_ENV: "ppid:40990"},
boot_id=f"boot{pid}",
)
base.update(overrides)
return base
class TestSchema(_DBCase):
def test_schema_version_is_bumped(self):
self.assertGreaterEqual(control_plane_db.SCHEMA_VERSION, 6)
def test_runtime_table_exists_on_a_fresh_database(self):
self.assertEqual(self.db.list_mcp_server_runtimes(), [])
def test_migration_is_additive_and_idempotent(self):
"""Re-opening an existing DB must not disturb the other tables."""
self.db.upsert_session(session_id="s-a", role="author", profile="prgs-author")
self.db.register_mcp_server_runtime(
self.record("gitea-author", "prgs-author", "author", 41000)
)
reopened = control_plane_db.ControlPlaneDB(db_path=self.db_path)
self.assertEqual(len(reopened.list_sessions()), 1)
self.assertEqual(len(reopened.list_mcp_server_runtimes()), 1)
class TestRegistration(_DBCase):
def test_registration_round_trips_every_field(self):
record = self.record("gitea-controller", "prgs-controller", "controller", 41001)
stored = self.db.register_mcp_server_runtime(record)
for key in (
"runtime_id",
"namespace",
"profile",
"role",
"remote",
"org",
"repo",
"repository_root",
"pid",
"cohort_id",
"cohort_source",
"client_provenance",
"boot_id",
"startup_head",
"transport",
"status",
):
self.assertEqual(stored[key], record[key], key)
def test_registration_requires_a_runtime_id(self):
record = self.record("gitea-author", "prgs-author", "author", 41002)
record["runtime_id"] = ""
with self.assertRaises(ValueError):
self.db.register_mcp_server_runtime(record)
def test_registration_requires_a_namespace(self):
record = self.record("gitea-author", "prgs-author", "author", 41003)
record["namespace"] = " "
with self.assertRaises(ValueError):
self.db.register_mcp_server_runtime(record)
def test_registration_requires_a_pid(self):
record = self.record("gitea-author", "prgs-author", "author", 41004)
record["pid"] = None
with self.assertRaises(ValueError):
self.db.register_mcp_server_runtime(record)
def test_five_members_register_independently(self):
for index, entry in enumerate(mfi.EXPECTED_PRGS_FLEET):
self.db.register_mcp_server_runtime(
self.record(
entry["namespace"], entry["profile"], entry["role"], 41100 + index
)
)
rows = self.db.list_mcp_server_runtimes()
self.assertEqual(len(rows), 5)
self.assertEqual(
sorted(r["profile"] for r in rows),
[
"prgs-author",
"prgs-controller",
"prgs-merger",
"prgs-reconciler",
"prgs-reviewer",
],
)
class TestPruning(_DBCase):
def test_reusing_a_pid_replaces_the_stale_row(self):
first = self.record("gitea-author", "prgs-author", "author", 41200)
self.db.register_mcp_server_runtime(first)
second = self.record("gitea-reviewer", "prgs-reviewer", "reviewer", 41200)
self.db.register_mcp_server_runtime(second)
rows = self.db.list_mcp_server_runtimes()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["runtime_id"], second["runtime_id"])
def test_pruning_never_removes_a_live_duplicate_on_another_pid(self):
"""The defect this must not have: hiding a second running server."""
first = self.record("gitea-author", "prgs-author", "author", 41300)
self.db.register_mcp_server_runtime(first)
second = self.record("gitea-author", "prgs-author", "author", 41301)
self.db.register_mcp_server_runtime(
second, retention_seconds=mfi.RUNTIME_RETENTION_SECONDS
)
rows = self.db.list_mcp_server_runtimes()
self.assertEqual(len(rows), 2)
self.assertEqual(sorted(r["pid"] for r in rows), [41300, 41301])
def test_retention_drops_rows_older_than_the_window(self):
old = self.record(
"gitea-merger",
"prgs-merger",
"merger",
41400,
registered_at=_stamp(-(mfi.RUNTIME_RETENTION_SECONDS + 3600)),
)
self.db.register_mcp_server_runtime(old)
fresh = self.record("gitea-author", "prgs-author", "author", 41401)
self.db.register_mcp_server_runtime(
fresh, retention_seconds=mfi.RUNTIME_RETENTION_SECONDS
)
rows = self.db.list_mcp_server_runtimes()
self.assertEqual([r["pid"] for r in rows], [41401])
def test_retention_is_skipped_when_not_requested(self):
old = self.record(
"gitea-merger",
"prgs-merger",
"merger",
41500,
registered_at=_stamp(-(mfi.RUNTIME_RETENTION_SECONDS + 3600)),
)
self.db.register_mcp_server_runtime(old)
self.db.register_mcp_server_runtime(
self.record("gitea-author", "prgs-author", "author", 41501)
)
self.assertEqual(len(self.db.list_mcp_server_runtimes()), 2)
class TestListing(_DBCase):
def test_listing_is_deterministically_ordered(self):
for index in range(5):
self.db.register_mcp_server_runtime(
self.record(
"gitea-author",
"prgs-author",
"author",
41600 + index,
registered_at="2026-07-28T02:00:00Z",
)
)
first = [r["runtime_id"] for r in self.db.list_mcp_server_runtimes()]
second = [r["runtime_id"] for r in self.db.list_mcp_server_runtimes()]
self.assertEqual(first, second)
self.assertEqual(first, sorted(first))
def test_status_filter_selects_running_rows(self):
running = self.record("gitea-author", "prgs-author", "author", 41700)
self.db.register_mcp_server_runtime(running)
stopped = self.record("gitea-merger", "prgs-merger", "merger", 41701)
self.db.register_mcp_server_runtime(stopped)
self.db.mark_mcp_server_runtime_stopped(stopped["runtime_id"])
rows = self.db.list_mcp_server_runtimes(statuses=("running",))
self.assertEqual([r["pid"] for r in rows], [41700])
def test_listing_without_a_filter_returns_stopped_rows_too(self):
stopped = self.record("gitea-merger", "prgs-merger", "merger", 41800)
self.db.register_mcp_server_runtime(stopped)
self.db.mark_mcp_server_runtime_stopped(stopped["runtime_id"])
rows = self.db.list_mcp_server_runtimes()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["status"], "stopped")
class TestHeartbeat(_DBCase):
def test_heartbeat_advances_only_the_timestamp(self):
record = self.record(
"gitea-author",
"prgs-author",
"author",
41900,
last_heartbeat_at="2026-07-28T02:00:00Z",
)
self.db.register_mcp_server_runtime(record)
self.db.heartbeat_mcp_server_runtime(record["runtime_id"])
row = self.db.list_mcp_server_runtimes()[0]
self.assertNotEqual(row["last_heartbeat_at"], "2026-07-28T02:00:00Z")
self.assertEqual(row["status"], "running")
self.assertEqual(row["pid"], 41900)
def test_heartbeat_for_an_unknown_runtime_is_a_no_op(self):
self.db.heartbeat_mcp_server_runtime("does-not-exist")
self.assertEqual(self.db.list_mcp_server_runtimes(), [])
class TestEndToEndSnapshot(_DBCase):
"""Registry rows feed the classifier without reshaping."""
def test_registered_fleet_classifies_as_healthy(self):
pids = []
for index, entry in enumerate(mfi.EXPECTED_PRGS_FLEET):
pid = 42000 + index
pids.append(pid)
self.db.register_mcp_server_runtime(
self.record(
entry["namespace"],
entry["profile"],
entry["role"],
pid,
registered_at="2026-07-28T02:00:00Z",
)
)
rows = self.db.list_mcp_server_runtimes(statuses=("running",))
scan = {
"available": True,
"processes": [
{"pid": pid, "started_at": "2026-07-28T01:00:00Z"} for pid in pids
],
"reason": None,
}
with mock.patch.object(mfi, "probe_pid_alive", return_value=True):
result = mfi.classify_fleet_inventory(
runtime_rows=rows,
process_scan=scan,
expected_binding={
"remote": "prgs",
"org": "Scaled-Tech-Consulting",
"repo": "Gitea-Tools",
},
)
self.assertTrue(result["inventory_complete"])
self.assertTrue(result["mutation_gate_satisfied"])
self.assertEqual(result["running_member_count"], 5)
if __name__ == "__main__":
unittest.main()
+337
View File
@@ -0,0 +1,337 @@
"""Native exposure of the fleet inventory capability (#949).
Covers the parts the pure classifier cannot: that the tool is registered and
documented, that it is gated on ``gitea.read`` rather than a role, that it
accepts no caller-supplied evidence, that it fails closed on an unreadable
registry, and that the workflow documentation explains gate consumption.
"""
import inspect
import os
import pathlib
import unittest
from unittest import mock
import gitea_mcp_server
import mcp_fleet_inventory as mfi
import task_capability_map
REPO_ROOT = pathlib.Path(__file__).resolve().parent.parent
TOOL_NAME = "gitea_assess_fleet_inventory"
class TestCapabilityMapExposure(unittest.TestCase):
"""AC14: the invariant is provable through sanctioned native calls."""
def test_task_resolves_to_a_read_permission(self):
self.assertEqual(
task_capability_map.required_permission("assess_fleet_inventory"),
"gitea.read",
)
self.assertEqual(
task_capability_map.required_permission(TOOL_NAME), "gitea.read"
)
def test_task_and_tool_keys_agree(self):
self.assertEqual(
task_capability_map.TASK_CAPABILITY_MAP["assess_fleet_inventory"],
task_capability_map.TASK_CAPABILITY_MAP[TOOL_NAME],
)
def test_task_is_not_role_exclusive(self):
"""Controller and reconciler both need it; so does any read-only gate."""
self.assertNotIn(
"assess_fleet_inventory", task_capability_map.ROLE_EXCLUSIVE_TASKS
)
self.assertNotIn(TOOL_NAME, task_capability_map.ROLE_EXCLUSIVE_TASKS)
def test_task_is_not_registered_as_an_issue_mutation(self):
self.assertNotIn(TOOL_NAME, task_capability_map.ISSUE_MUTATION_TOOL_TASKS)
def test_unknown_task_still_fails_closed(self):
with self.assertRaises(KeyError):
task_capability_map.required_permission("assess_fleet_inventory_typo")
class TestToolRegistration(unittest.TestCase):
def test_tool_is_registered_on_the_server(self):
self.assertTrue(hasattr(gitea_mcp_server, TOOL_NAME))
def test_tool_accepts_no_caller_supplied_evidence(self):
"""The defect #949 names: evidence parameters the caller controls."""
signature = inspect.signature(gitea_mcp_server.gitea_assess_fleet_inventory)
self.assertEqual(sorted(signature.parameters), ["host", "org", "remote", "repo"])
for forbidden in ("process", "probe_result", "registered_tools", "processes"):
self.assertNotIn(forbidden, signature.parameters)
def test_tool_is_documented_in_the_canonical_inventory(self):
doc = (REPO_ROOT / "docs" / "mcp-tool-inventory.md").read_text()
self.assertIn(f"`{TOOL_NAME}`", doc)
def test_docstring_states_the_read_only_guarantee(self):
doc = (gitea_mcp_server.gitea_assess_fleet_inventory.__doc__ or "").lower()
self.assertIn("read-only", doc)
self.assertIn("fails closed", doc)
class TestNamespaceResolution(unittest.TestCase):
"""Every configured profile must resolve to its real fleet namespace.
``role_namespace_gate.infer_mcp_namespace`` recognises only author and
reviewer and echoes the profile name for the rest, which would label the
controller, merger, and reconciler members with namespaces that do not
exist and then flag all three as role mismatches.
"""
def test_every_expected_profile_maps_to_its_namespace(self):
for entry in mfi.EXPECTED_PRGS_FLEET:
self.assertEqual(
mfi.namespace_for_profile(entry["profile"]),
entry["namespace"],
entry["profile"],
)
def test_server_helper_agrees_with_the_roster(self):
for entry in mfi.EXPECTED_PRGS_FLEET:
self.assertEqual(
gitea_mcp_server._fleet_namespace_for_profile(entry["profile"]),
entry["namespace"],
entry["profile"],
)
def test_unknown_profile_falls_back_to_the_supplied_default(self):
self.assertEqual(
mfi.namespace_for_profile("prgs-shadow", default="gitea-shadow"),
"gitea-shadow",
)
def test_unknown_profile_without_a_default_returns_the_profile(self):
self.assertEqual(mfi.namespace_for_profile("prgs-shadow"), "prgs-shadow")
def test_registered_row_uses_the_roster_namespace(self):
fake_db = mock.Mock()
with mock.patch.object(
gitea_mcp_server, "_control_plane_db_or_error", return_value=(fake_db, [])
), mock.patch.object(
gitea_mcp_server, "get_profile", return_value={"allowed_operations": []}
), mock.patch.object(
gitea_mcp_server.gitea_config,
"selected_profile_name",
return_value="prgs-reconciler",
):
record = gitea_mcp_server._register_fleet_runtime(transport="stdio")
self.assertEqual(record["namespace"], "gitea-reconciler")
class TestToolBehavior(unittest.TestCase):
"""The tool wires the registry and the process scan into the classifier."""
@staticmethod
def _healthy_rows():
return [
{
"runtime_id": f"{entry['namespace']}:{43000 + index}:boot",
"namespace": entry["namespace"],
"profile": entry["profile"],
"role": entry["role"],
"remote": "prgs",
"org": "Scaled-Tech-Consulting",
"repo": "Gitea-Tools",
"repository_root": "/checkout/Gitea-Tools",
"pid": 43000 + index,
"cohort_id": "ppid:40990",
"cohort_source": "parent_process",
"client_provenance": "client_managed",
"boot_id": "boot",
"startup_head": "82d71b77028a7abd4f8ab4a4e4d89658a187f73d",
"daemon_start_head": "82d71b77028a7abd4f8ab4a4e4d89658a187f73d",
"transport": "stdio",
"registered_at": "2026-07-28T02:00:00Z",
"last_heartbeat_at": "2026-07-28T02:00:00Z",
"status": "running",
}
for index, entry in enumerate(mfi.EXPECTED_PRGS_FLEET)
]
def _call(self, rows, *, scan=None, db=None, db_errors=None):
fake_db = db
if fake_db is None and db_errors is None:
fake_db = mock.Mock()
fake_db.list_mcp_server_runtimes.return_value = rows
scan = scan or {
"available": True,
"processes": [
{"pid": r["pid"], "started_at": "2026-07-28T01:00:00Z"} for r in rows
],
"reason": None,
}
with mock.patch.object(
gitea_mcp_server, "_profile_operation_gate", return_value=[]
), mock.patch.object(
gitea_mcp_server,
"_control_plane_db_or_error",
return_value=(fake_db, db_errors or []),
), mock.patch.object(
gitea_mcp_server, "_active_profile_name", return_value="prgs-controller"
), mock.patch.object(
mfi, "scan_mcp_server_processes", return_value=scan
), mock.patch.object(
mfi, "probe_pid_alive", return_value=True
):
return gitea_mcp_server.gitea_assess_fleet_inventory(
remote="prgs", org="Scaled-Tech-Consulting", repo="Gitea-Tools"
)
def test_healthy_fleet_satisfies_the_gate_through_the_tool(self):
result = self._call(self._healthy_rows())
self.assertTrue(result["inventory_complete"])
self.assertTrue(result["mutation_gate_satisfied"])
self.assertEqual(result["running_member_count"], 5)
self.assertEqual(result["mutations_performed"], [])
def test_tool_reports_the_expected_repository_binding(self):
result = self._call(self._healthy_rows())
self.assertEqual(
result["expected_repository_binding"],
{"remote": "prgs", "org": "Scaled-Tech-Consulting", "repo": "Gitea-Tools"},
)
def test_tool_reads_only_running_rows(self):
rows = self._healthy_rows()
fake_db = mock.Mock()
fake_db.list_mcp_server_runtimes.return_value = rows
self._call(rows, db=fake_db)
fake_db.list_mcp_server_runtimes.assert_called_once_with(statuses=("running",))
def test_tool_never_writes_to_the_registry(self):
rows = self._healthy_rows()
fake_db = mock.Mock()
fake_db.list_mcp_server_runtimes.return_value = rows
self._call(rows, db=fake_db)
fake_db.register_mcp_server_runtime.assert_not_called()
fake_db.heartbeat_mcp_server_runtime.assert_not_called()
fake_db.mark_mcp_server_runtime_stopped.assert_not_called()
def test_unavailable_control_plane_fails_closed(self):
result = self._call([], db_errors=["control-plane DB substrate unavailable"])
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertFalse(result["registry"]["available"])
self.assertIn("unavailable", result["blocked_reason"])
def test_registry_read_failure_fails_closed(self):
rows = self._healthy_rows()
fake_db = mock.Mock()
fake_db.list_mcp_server_runtimes.side_effect = RuntimeError("db locked")
result = self._call(rows, db=fake_db)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("could not be read", result["registry"]["error"])
def test_missing_read_permission_blocks_without_touching_the_registry(self):
fake_db = mock.Mock()
with mock.patch.object(
gitea_mcp_server,
"_profile_operation_gate",
return_value=["profile may not read"],
), mock.patch.object(
gitea_mcp_server, "_control_plane_db_or_error", return_value=(fake_db, [])
):
result = gitea_mcp_server.gitea_assess_fleet_inventory(remote="prgs")
self.assertFalse(result["success"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("permission_report", result)
self.assertEqual(result["mutations_performed"], [])
fake_db.list_mcp_server_runtimes.assert_not_called()
def test_answering_namespace_is_reported(self):
result = self._call(self._healthy_rows())
self.assertEqual(result["answering_namespace"], "gitea-controller")
def test_summary_is_present(self):
result = self._call(self._healthy_rows())
self.assertIn("5 of 5", result["summary"])
class TestStartupRegistration(unittest.TestCase):
"""The registry row is written by the process it describes."""
def test_registration_helper_exists_on_the_entrypoint_module(self):
self.assertTrue(hasattr(gitea_mcp_server, "_register_fleet_runtime"))
def test_registration_writes_one_row_for_this_process(self):
fake_db = mock.Mock()
with mock.patch.object(
gitea_mcp_server, "_control_plane_db_or_error", return_value=(fake_db, [])
), mock.patch.object(
gitea_mcp_server, "get_profile", return_value={"allowed_operations": []}
):
record = gitea_mcp_server._register_fleet_runtime(transport="stdio")
self.assertIsNotNone(record)
fake_db.register_mcp_server_runtime.assert_called_once()
written = fake_db.register_mcp_server_runtime.call_args.args[0]
self.assertEqual(written["pid"], os.getpid())
self.assertEqual(written["transport"], "stdio")
def test_registration_failure_never_blocks_startup(self):
with mock.patch.object(
gitea_mcp_server,
"_control_plane_db_or_error",
side_effect=RuntimeError("boom"),
):
self.assertIsNone(gitea_mcp_server._register_fleet_runtime())
def test_registration_is_skipped_when_the_control_plane_is_unavailable(self):
with mock.patch.object(
gitea_mcp_server,
"_control_plane_db_or_error",
return_value=(None, ["unavailable"]),
):
self.assertIsNone(gitea_mcp_server._register_fleet_runtime())
def test_entrypoint_registers_after_binding_native_transport(self):
"""Order matters: only a transport-bound process may claim a row."""
source = (REPO_ROOT / "gitea_mcp_server.py").read_text()
bind_at = source.index('bind_native_mcp_transport(transport="stdio")')
register_at = source.index('_register_fleet_runtime(transport="stdio")')
run_at = source.index('mcp.run(transport="stdio")')
self.assertLess(bind_at, register_at)
self.assertLess(register_at, run_at)
class TestWorkflowDocumentation(unittest.TestCase):
"""AC13: documentation explains how the gates consume the result."""
def setUp(self):
self.doc = (REPO_ROOT / "docs" / "mcp-fleet-inventory.md").read_text()
self.skill = (
REPO_ROOT / "skills" / "llm-project-workflow" / "SKILL.md"
).read_text()
def test_dedicated_document_exists(self):
self.assertIn("# Authoritative MCP fleet inventory", self.doc)
def test_document_names_both_consuming_namespaces(self):
self.assertIn("gitea-controller", self.doc)
self.assertIn("gitea-reconciler", self.doc)
def test_document_explains_gate_consumption(self):
self.assertIn("mutation_gate_satisfied", self.doc)
self.assertIn("blocked_reason", self.doc)
def test_document_states_the_non_inferences(self):
self.assertIn("Configuration is not existence", self.doc)
self.assertIn("Matching revisions are not a cohort", self.doc)
def test_document_preserves_the_neighbouring_issue_boundaries(self):
for issue in ("#950", "#951", "#952"):
self.assertIn(issue, self.doc)
def test_canonical_workflow_skill_links_the_document(self):
self.assertIn("docs/mcp-fleet-inventory.md", self.skill)
self.assertIn(TOOL_NAME, self.skill)
if __name__ == "__main__":
unittest.main()
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"""Authoritative fleet inventory classification (#949).
One test group per acceptance criterion. The classifier is pure, so every
scenario is expressed as a snapshot: registry rows plus a process observation.
PID liveness is the one impure input, so it is patched per test rather than
depending on whatever happens to be running on the machine.
"""
import os
import unittest
from datetime import datetime, timedelta, timezone
from unittest import mock
import mcp_fleet_inventory as mfi
NOW = datetime(2026, 7, 28, 3, 0, 0, tzinfo=timezone.utc)
HEAD_A = "82d71b77028a7abd4f8ab4a4e4d89658a187f73d"
HEAD_B = "35ed8a2fcb11134a37c862ca6eaca26e3028902a"
COHORT_A = "ppid:40990"
COHORT_B = "ppid:51022"
BINDING = {"remote": "prgs", "org": "Scaled-Tech-Consulting", "repo": "Gitea-Tools"}
_BASE_PID = 41000
def row(
namespace,
profile,
role,
pid,
*,
cohort_id=COHORT_A,
startup_head=HEAD_A,
registered_at="2026-07-28T02:00:00Z",
**overrides,
):
"""One control-plane runtime registry row."""
record = {
"runtime_id": f"{namespace}:{pid}:boot{pid}",
"namespace": namespace,
"profile": profile,
"role": role,
"remote": BINDING["remote"],
"org": BINDING["org"],
"repo": BINDING["repo"],
"repository_root": "/checkout/Gitea-Tools",
"pid": pid,
"cohort_id": cohort_id,
"cohort_source": "parent_process",
"client_provenance": "client_managed",
"boot_id": f"boot{pid}",
"startup_head": startup_head,
"daemon_start_head": startup_head,
"transport": "stdio",
"registered_at": registered_at,
"last_heartbeat_at": registered_at,
"status": "running",
}
record.update(overrides)
return record
def healthy_rows():
"""One live row per expected member, all one cohort, all one revision."""
return [
row(entry["namespace"], entry["profile"], entry["role"], _BASE_PID + index)
for index, entry in enumerate(mfi.EXPECTED_PRGS_FLEET)
]
def scan_for(rows, *, available=True, extra_pids=(), started_at="2026-07-28T01:00:00Z"):
"""A process observation that corroborates *rows* (plus any extra PIDs)."""
processes = [
{"pid": r["pid"], "started_at": started_at, "command": "python mcp_server.py"}
for r in rows
]
processes.extend(
{"pid": pid, "started_at": started_at, "command": "python mcp_server.py"}
for pid in extra_pids
)
return {"available": available, "processes": processes, "reason": None}
def classify(rows, scan=None, **kwargs):
kwargs.setdefault("expected_binding", BINDING)
kwargs.setdefault("now", NOW)
return mfi.classify_fleet_inventory(
runtime_rows=rows,
process_scan=scan if scan is not None else scan_for(rows),
**kwargs,
)
class _AliveMixin:
"""Treat every PID as alive unless a test declares it dead or unknown."""
def setUp(self):
super().setUp()
self.dead_pids = set()
self.unknown_pids = set()
def probe(pid):
if pid in self.unknown_pids:
return None
return pid not in self.dead_pids
patcher = mock.patch.object(mfi, "probe_pid_alive", side_effect=probe)
patcher.start()
self.addCleanup(patcher.stop)
class TestHealthyFleet(_AliveMixin, unittest.TestCase):
"""AC1: a healthy five-server fleet reports all five members exactly once."""
def test_five_members_each_reported_once(self):
result = classify(healthy_rows())
self.assertEqual(len(result["configured_members"]), 5)
self.assertEqual(len(result["running_members"]), 5)
self.assertEqual(result["running_member_count"], 5)
self.assertEqual(result["missing_members"], [])
self.assertEqual(result["duplicate_members"], [])
self.assertEqual(result["unexpected_members"], [])
self.assertTrue(result["exactly_one_per_profile"])
for member in result["configured_members"]:
self.assertEqual(member["instance_count"], 1)
self.assertEqual(member["health"], mfi.HEALTH_RUNNING)
def test_healthy_fleet_satisfies_the_mutation_gate(self):
result = classify(healthy_rows())
self.assertTrue(result["inventory_complete"])
self.assertTrue(result["mutation_gate_satisfied"])
self.assertIsNone(result["blocked_reason"])
self.assertTrue(result["single_cohort"])
self.assertFalse(result["mixed_cohort"])
self.assertFalse(result["mixed_revision"])
def test_every_expected_namespace_and_profile_is_present(self):
result = classify(healthy_rows())
self.assertEqual(
sorted(m["profile"] for m in result["configured_members"]),
[
"prgs-author",
"prgs-controller",
"prgs-merger",
"prgs-reconciler",
"prgs-reviewer",
],
)
class TestDuplicateMember(_AliveMixin, unittest.TestCase):
"""AC2: two processes on one profile are a duplicate and fail the gate."""
def test_duplicate_is_reported_with_every_pid(self):
rows = healthy_rows()
rows.append(row("gitea-author", "prgs-author", "author", 49999))
result = classify(rows)
self.assertEqual(len(result["duplicate_members"]), 1)
duplicate = result["duplicate_members"][0]
self.assertEqual(duplicate["profile"], "prgs-author")
self.assertEqual(duplicate["instance_count"], 2)
self.assertEqual(duplicate["pids"], [_BASE_PID, 49999])
def test_duplicate_fails_the_mutation_gate(self):
rows = healthy_rows()
rows.append(row("gitea-author", "prgs-author", "author", 49999))
result = classify(rows)
self.assertFalse(result["exactly_one_per_profile"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("duplicate", result["blocked_reason"])
def test_duplicate_is_not_reported_as_missing_or_unexpected(self):
rows = healthy_rows()
rows.append(row("gitea-author", "prgs-author", "author", 49999))
result = classify(rows)
self.assertEqual(result["missing_members"], [])
self.assertEqual(result["unexpected_members"], [])
class TestMissingMember(_AliveMixin, unittest.TestCase):
"""AC3: a missing expected server is identified and fails the gate."""
def test_missing_member_is_named(self):
rows = [r for r in healthy_rows() if r["profile"] != "prgs-merger"]
result = classify(rows)
self.assertEqual(len(result["missing_members"]), 1)
self.assertEqual(result["missing_members"][0]["profile"], "prgs-merger")
self.assertEqual(result["missing_members"][0]["health"], mfi.HEALTH_MISSING)
def test_missing_member_fails_the_mutation_gate(self):
rows = [r for r in healthy_rows() if r["profile"] != "prgs-merger"]
result = classify(rows)
self.assertFalse(result["exactly_one_per_profile"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("prgs-merger", result["blocked_reason"])
def test_missing_member_still_lists_all_configured_members(self):
rows = [r for r in healthy_rows() if r["profile"] != "prgs-merger"]
result = classify(rows)
self.assertEqual(len(result["configured_members"]), 5)
merger = [
m for m in result["configured_members"] if m["profile"] == "prgs-merger"
][0]
self.assertEqual(merger["instance_count"], 0)
self.assertEqual(merger["health"], mfi.HEALTH_MISSING)
class TestUnexpectedMember(_AliveMixin, unittest.TestCase):
"""AC4: an unexpected PRGS server is reported explicitly."""
def test_unexpected_member_is_its_own_category(self):
rows = healthy_rows()
rows.append(row("gitea-shadow", "prgs-shadow", "author", 47777))
result = classify(rows)
self.assertEqual(len(result["unexpected_members"]), 1)
self.assertEqual(result["unexpected_members"][0]["profile"], "prgs-shadow")
self.assertEqual(
result["unexpected_members"][0]["health"], mfi.HEALTH_UNEXPECTED
)
def test_unexpected_member_is_not_collapsed_into_duplicates_or_missing(self):
rows = healthy_rows()
rows.append(row("gitea-shadow", "prgs-shadow", "author", 47777))
result = classify(rows)
self.assertEqual(result["duplicate_members"], [])
self.assertEqual(result["missing_members"], [])
self.assertTrue(result["exactly_one_per_profile"])
self.assertFalse(result["no_unexpected_members"])
self.assertFalse(result["mutation_gate_satisfied"])
def test_unexpected_member_blocks_with_its_own_reason(self):
rows = healthy_rows()
rows.append(row("gitea-shadow", "prgs-shadow", "author", 47777))
result = classify(rows)
self.assertTrue(
any("unexpected" in reason for reason in result["blocked_reasons"])
)
class TestMixedCohort(_AliveMixin, unittest.TestCase):
"""AC5: members from different client cohorts are detected."""
def test_two_cohorts_are_detected(self):
rows = healthy_rows()
rows[0]["cohort_id"] = COHORT_B
result = classify(rows)
self.assertTrue(result["mixed_cohort"])
self.assertFalse(result["single_cohort"])
self.assertEqual(result["cohort_ids"], sorted([COHORT_A, COHORT_B]))
def test_mixed_cohort_fails_the_mutation_gate(self):
rows = healthy_rows()
rows[0]["cohort_id"] = COHORT_B
result = classify(rows)
self.assertFalse(result["mutation_gate_satisfied"])
self.assertTrue(any("cohort" in reason for reason in result["blocked_reasons"]))
def test_mixed_cohort_is_not_a_duplicate_or_missing_report(self):
rows = healthy_rows()
rows[0]["cohort_id"] = COHORT_B
result = classify(rows)
self.assertEqual(result["duplicate_members"], [])
self.assertEqual(result["missing_members"], [])
class TestMixedRevision(_AliveMixin, unittest.TestCase):
"""AC6: members running different startup revisions are detected."""
def test_two_revisions_are_detected(self):
rows = healthy_rows()
rows[0]["startup_head"] = HEAD_B
result = classify(rows)
self.assertTrue(result["mixed_revision"])
self.assertEqual(result["startup_revisions"], sorted([HEAD_A, HEAD_B]))
def test_mixed_revision_fails_the_mutation_gate(self):
rows = healthy_rows()
rows[0]["startup_head"] = HEAD_B
result = classify(rows)
self.assertFalse(result["mutation_gate_satisfied"])
self.assertTrue(
any("revision" in reason for reason in result["blocked_reasons"])
)
def test_mixed_revision_does_not_by_itself_imply_mixed_cohort(self):
rows = healthy_rows()
rows[0]["startup_head"] = HEAD_B
result = classify(rows)
self.assertTrue(result["single_cohort"])
self.assertFalse(result["mixed_cohort"])
class TestRevisionIsNotCohort(_AliveMixin, unittest.TestCase):
"""AC7: matching Git revisions alone do not establish a single cohort."""
def test_identical_revisions_with_unknown_cohort_stay_unknown(self):
rows = healthy_rows()
for r in rows:
r["cohort_id"] = None
result = classify(rows)
self.assertEqual(len({r["startup_head"] for r in rows}), 1)
self.assertIsNone(result["single_cohort"])
self.assertIsNone(result["mixed_cohort"])
def test_identical_revisions_with_unknown_cohort_fail_closed(self):
rows = healthy_rows()
for r in rows:
r["cohort_id"] = None
result = classify(rows)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertTrue(
any("cohort" in reason for reason in result["incomplete_reasons"])
)
def test_one_unknown_cohort_among_known_ones_still_fails_closed(self):
rows = healthy_rows()
rows[0]["cohort_id"] = None
result = classify(rows)
self.assertIsNone(result["single_cohort"])
self.assertFalse(result["mutation_gate_satisfied"])
def test_cohort_derivation_never_consults_revisions(self):
"""The cohort helper takes no revision input at all."""
identity = mfi.derive_cohort_identity({mfi.COHORT_ID_ENV: "cohort-x"})
self.assertEqual(identity["cohort_id"], "cohort-x")
self.assertEqual(identity["cohort_source"], "explicit_env")
def test_orphaned_process_reports_unknown_cohort(self):
with mock.patch("os.getppid", return_value=1):
identity = mfi.derive_cohort_identity({})
self.assertIsNone(identity["cohort_id"])
self.assertEqual(identity["cohort_source"], "unknown")
def test_parent_process_is_the_cohort_when_no_env_is_set(self):
with mock.patch("os.getppid", return_value=40990):
identity = mfi.derive_cohort_identity({})
self.assertEqual(identity["cohort_id"], COHORT_A)
self.assertEqual(identity["cohort_source"], "parent_process")
class TestConfigurationIsNotRunning(_AliveMixin, unittest.TestCase):
"""AC8: configuration without a live worker is not a running member."""
def test_no_registry_rows_means_every_member_is_missing(self):
result = classify([], scan=scan_for([]))
self.assertEqual(len(result["missing_members"]), 5)
self.assertEqual(result["running_members"], [])
self.assertFalse(result["mutation_gate_satisfied"])
def test_dead_pid_is_stale_not_running(self):
rows = healthy_rows()
self.dead_pids = {rows[0]["pid"]}
result = classify(rows)
self.assertEqual(len(result["running_members"]), 4)
self.assertEqual(len(result["stale_members"]), 1)
self.assertEqual(result["stale_members"][0]["liveness"], mfi.LIVENESS_DEAD)
self.assertEqual(result["stale_members"][0]["health"], mfi.HEALTH_STALE)
self.assertEqual(len(result["missing_members"]), 1)
def test_registry_row_without_a_matching_process_is_not_running(self):
rows = healthy_rows()
scan = scan_for(rows[1:]) # first member's process is absent
result = classify(rows, scan=scan)
self.assertEqual(len(result["running_members"]), 4)
self.assertEqual(
result["stale_members"][0]["liveness"], mfi.LIVENESS_UNOBSERVED
)
self.assertFalse(result["mutation_gate_satisfied"])
def test_recycled_pid_does_not_impersonate_a_dead_server(self):
rows = healthy_rows()
scan = scan_for(rows)
# The process now holding the first PID started *after* registration.
scan["processes"][0]["started_at"] = "2026-07-28T02:30:00Z"
result = classify(rows, scan=scan)
stale = [
m
for m in result["stale_members"]
if m["liveness"] == mfi.LIVENESS_PID_RECYCLED
]
self.assertEqual(len(stale), 1)
self.assertEqual(len(result["running_members"]), 4)
self.assertFalse(result["mutation_gate_satisfied"])
class TestIncompleteEvidenceFailsClosed(_AliveMixin, unittest.TestCase):
"""AC9: unknown or unavailable evidence produces a fail-closed result."""
def test_unavailable_process_listing_fails_closed(self):
rows = healthy_rows()
result = classify(
rows,
scan={"available": False, "processes": [], "reason": "ps unavailable"},
)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("ps unavailable", result["incomplete_reasons"])
self.assertEqual(result["running_members"], [])
def test_unreadable_registry_fails_closed(self):
result = classify(
[],
scan=scan_for([]),
registry_available=False,
registry_error="registry unreadable",
)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertIn("registry unreadable", result["incomplete_reasons"])
def test_unregistered_running_process_fails_closed(self):
rows = healthy_rows()
result = classify(rows, scan=scan_for(rows, extra_pids=[59999]))
self.assertEqual([p["pid"] for p in result["unregistered_processes"]], [59999])
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertTrue(
any("59999" in reason for reason in result["incomplete_reasons"])
)
def test_undeterminable_pid_liveness_is_unknown_not_healthy(self):
rows = healthy_rows()
self.unknown_pids = {rows[0]["pid"]}
result = classify(rows)
self.assertEqual(result["stale_members"][0]["liveness"], mfi.LIVENESS_UNKNOWN)
self.assertEqual(result["stale_members"][0]["health"], mfi.HEALTH_UNKNOWN)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
def test_unknown_startup_revision_fails_closed(self):
rows = healthy_rows()
rows[0]["startup_head"] = None
result = classify(rows)
self.assertFalse(result["inventory_complete"])
self.assertFalse(result["mutation_gate_satisfied"])
self.assertTrue(
any("startup revision" in r for r in result["incomplete_reasons"])
)
def test_unknown_is_distinguished_from_healthy(self):
rows = healthy_rows()
for r in rows:
r["cohort_id"] = None
result = classify(rows)
# Not "unhealthy" in the sense of a named defect: nothing is missing,
# duplicated or unexpected. It is *unknown*, and that still fails closed.
self.assertEqual(result["missing_members"], [])
self.assertEqual(result["duplicate_members"], [])
self.assertEqual(result["unexpected_members"], [])
self.assertIsNone(result["single_cohort"])
self.assertFalse(result["mutation_gate_satisfied"])
class TestBindingAndRoleConsistency(_AliveMixin, unittest.TestCase):
"""Repository-binding and role/profile mismatches fail closed."""
def test_repository_binding_mismatch_is_reported(self):
rows = healthy_rows()
rows[0]["repo"] = "Some-Other-Repo"
result = classify(rows)
self.assertEqual(len(result["repository_binding_mismatches"]), 1)
self.assertEqual(
result["repository_binding_mismatches"][0]["repo"], "Some-Other-Repo"
)
self.assertFalse(result["mutation_gate_satisfied"])
def test_incomplete_repository_binding_is_reported(self):
rows = healthy_rows()
rows[0]["org"] = None
result = classify(rows)
self.assertEqual(len(result["repository_binding_mismatches"]), 1)
self.assertIn("complete", result["repository_binding_mismatches"][0]["reason"])
self.assertFalse(result["mutation_gate_satisfied"])
def test_role_mismatch_is_reported(self):
rows = healthy_rows()
rows[0]["role"] = "merger" # prgs-author is configured as author
result = classify(rows)
self.assertEqual(len(result["role_mismatches"]), 1)
self.assertEqual(result["role_mismatches"][0]["expected_role"], "author")
self.assertEqual(result["role_mismatches"][0]["declared_role"], "merger")
self.assertFalse(result["mutation_gate_satisfied"])
def test_profile_served_from_the_wrong_namespace_is_reported(self):
rows = healthy_rows()
rows[0]["namespace"] = "gitea-reviewer"
result = classify(rows)
self.assertTrue(
any(
m.get("expected_namespace") == "gitea-author"
for m in result["role_mismatches"]
)
)
self.assertFalse(result["mutation_gate_satisfied"])
def test_matching_binding_produces_no_mismatch(self):
result = classify(healthy_rows())
self.assertEqual(result["repository_binding_mismatches"], [])
self.assertEqual(result["role_mismatches"], [])
class TestDeterminism(_AliveMixin, unittest.TestCase):
"""AC10 / stable ordering and deterministic structured output."""
def test_identical_snapshots_produce_identical_results(self):
rows = healthy_rows()
first = classify(rows, scan=scan_for(rows))
second = classify(healthy_rows(), scan=scan_for(healthy_rows()))
self.assertEqual(first, second)
def test_row_order_does_not_change_the_result(self):
rows = healthy_rows()
shuffled = list(reversed(healthy_rows()))
forward = classify(rows, scan=scan_for(rows))
backward = classify(shuffled, scan=scan_for(shuffled))
self.assertEqual(forward["running_members"], backward["running_members"])
self.assertEqual(forward["configured_members"], backward["configured_members"])
self.assertEqual(
forward["mutation_gate_satisfied"], backward["mutation_gate_satisfied"]
)
def test_members_are_sorted_by_namespace_then_profile_then_pid(self):
rows = healthy_rows()
rows.append(row("gitea-author", "prgs-author", "author", 40001))
result = classify(rows)
keys = [
(m["namespace"], m["profile"], m["pid"]) for m in result["running_members"]
]
self.assertEqual(keys, sorted(keys))
def test_answering_namespace_does_not_change_the_verdict(self):
"""AC10: controller and reconciler agree for one fleet snapshot."""
rows = healthy_rows()
controller = classify(
rows, scan=scan_for(rows), answering_namespace="gitea-controller"
)
reconciler = classify(
healthy_rows(),
scan=scan_for(healthy_rows()),
answering_namespace="gitea-reconciler",
)
self.assertEqual(controller["answering_namespace"], "gitea-controller")
self.assertEqual(reconciler["answering_namespace"], "gitea-reconciler")
for key in sorted(set(controller) - {"answering_namespace"}):
self.assertEqual(controller[key], reconciler[key], f"{key} disagreed")
def test_controller_and_reconciler_agree_on_an_unhealthy_fleet(self):
rows = [r for r in healthy_rows() if r["profile"] != "prgs-merger"]
controller = classify(
rows, scan=scan_for(rows), answering_namespace="gitea-controller"
)
reconciler = classify(
rows, scan=scan_for(rows), answering_namespace="gitea-reconciler"
)
self.assertEqual(controller["blocked_reason"], reconciler["blocked_reason"])
self.assertEqual(
controller["mutation_gate_satisfied"],
reconciler["mutation_gate_satisfied"],
)
class TestReadOnly(_AliveMixin, unittest.TestCase):
"""AC11: the capability mutates nothing."""
def test_classification_reports_no_mutations(self):
result = classify(healthy_rows())
self.assertEqual(result["mutations_performed"], [])
self.assertTrue(result["read_only"])
def test_classification_does_not_write_the_input_rows_back(self):
rows = healthy_rows()
snapshot = [dict(r) for r in rows]
classify(rows)
self.assertEqual(rows, snapshot)
class TestLivenessProbe(unittest.TestCase):
"""AC11: the real probe never sends a terminating signal.
Deliberately *not* using ``_AliveMixin`` these tests exercise
``probe_pid_alive`` itself, which the mixin replaces.
"""
def test_only_signal_zero_is_ever_sent(self):
with mock.patch("os.kill") as killer:
mfi.probe_pid_alive(4242)
killer.assert_called_once_with(4242, 0)
def test_classifying_a_duplicate_never_terminates_it(self):
rows = healthy_rows()
rows.append(row("gitea-author", "prgs-author", "author", 49999))
with mock.patch("os.kill") as killer:
result = mfi.classify_fleet_inventory(
runtime_rows=rows,
process_scan=scan_for(rows),
expected_binding=BINDING,
now=NOW,
)
self.assertTrue(killer.call_args_list, "liveness must actually be probed")
for call in killer.call_args_list:
self.assertEqual(call.args[1], 0, "only signal 0 may ever be sent")
self.assertEqual(result["mutations_performed"], [])
def test_liveness_probe_tolerates_a_missing_process(self):
with mock.patch("os.kill", side_effect=ProcessLookupError):
self.assertFalse(mfi.probe_pid_alive(4242))
def test_liveness_probe_treats_permission_error_as_alive(self):
with mock.patch("os.kill", side_effect=PermissionError):
self.assertTrue(mfi.probe_pid_alive(4242))
def test_liveness_probe_returns_unknown_on_other_os_errors(self):
with mock.patch("os.kill", side_effect=OSError):
self.assertIsNone(mfi.probe_pid_alive(4242))
def test_invalid_pid_is_unknown_and_probes_nothing(self):
with mock.patch("os.kill") as killer:
self.assertIsNone(mfi.probe_pid_alive(None))
self.assertIsNone(mfi.probe_pid_alive(0))
killer.assert_not_called()
class TestMultiClientRegression(_AliveMixin, unittest.TestCase):
"""The multi-LLM duplicate-server scenario that motivated #949."""
@staticmethod
def _two_client_rows():
first = healthy_rows()
second = [
row(
entry["namespace"],
entry["profile"],
entry["role"],
50000 + index,
cohort_id=COHORT_B,
)
for index, entry in enumerate(mfi.EXPECTED_PRGS_FLEET)
]
return first + second
def test_second_client_running_the_same_five_profiles_is_caught(self):
"""Two clients, ten servers, same profiles, same revision.
Every member self-reports the same parity, which is exactly why the old
per-process surfaces reported success. The fleet inventory must report
five duplicates, two cohorts, and a closed gate.
"""
rows = self._two_client_rows()
result = classify(rows, scan=scan_for(rows))
self.assertEqual(len(result["duplicate_members"]), 5)
self.assertFalse(result["exactly_one_per_profile"])
self.assertTrue(result["mixed_cohort"])
self.assertFalse(result["single_cohort"])
self.assertFalse(result["mixed_revision"], "both clients share a revision")
self.assertFalse(result["mutation_gate_satisfied"])
self.assertEqual(result["missing_members"], [])
def test_identical_parity_across_ten_servers_is_not_health(self):
rows = self._two_client_rows()
result = classify(rows, scan=scan_for(rows))
self.assertEqual(result["startup_revisions"], [HEAD_A])
self.assertFalse(result["mutation_gate_satisfied"])
def test_every_duplicate_pid_is_named_for_the_operator(self):
rows = self._two_client_rows()
result = classify(rows, scan=scan_for(rows))
for duplicate in result["duplicate_members"]:
self.assertEqual(len(duplicate["pids"]), 2)
class TestProcessScan(unittest.TestCase):
"""The process observation is server-side and fails closed."""
def test_scan_parses_mcp_server_processes(self):
stdout = (
" PID STARTED COMMAND\n"
" 41000 Mon Jul 27 20:00:00 2026 python /path/mcp_server.py\n"
" 41001 Mon Jul 27 20:00:01 2026 python /path/other_server.py\n"
)
result = mfi.scan_mcp_server_processes(
runner=lambda *a, **k: mock.Mock(stdout=stdout)
)
self.assertTrue(result["available"])
self.assertEqual([p["pid"] for p in result["processes"]], [41000])
def test_scan_failure_reports_unavailable_rather_than_empty(self):
def boom(*args, **kwargs):
raise OSError("ps missing")
result = mfi.scan_mcp_server_processes(runner=boom)
self.assertFalse(result["available"])
self.assertEqual(result["processes"], [])
self.assertIn("ps missing", result["reason"])
def test_scan_results_are_sorted_by_pid(self):
stdout = (
" PID STARTED COMMAND\n"
" 41005 Mon Jul 27 20:00:00 2026 python /path/mcp_server.py\n"
" 41001 Mon Jul 27 20:00:01 2026 python /path/mcp_server.py\n"
)
result = mfi.scan_mcp_server_processes(
runner=lambda *a, **k: mock.Mock(stdout=stdout)
)
self.assertEqual([p["pid"] for p in result["processes"]], [41001, 41005])
class TestRuntimeRecord(unittest.TestCase):
"""The row a server writes about itself."""
def test_record_describes_the_calling_process(self):
record = mfi.build_process_runtime_record(
namespace="gitea-controller",
profile="prgs-controller",
role="controller",
remote="prgs",
org=BINDING["org"],
repo=BINDING["repo"],
pid=41022,
startup_head=HEAD_A,
transport="stdio",
client_provenance="client_managed",
env={mfi.COHORT_ID_ENV: COHORT_A},
boot_id="deadbeefcafe0001",
)
self.assertEqual(
record["runtime_id"], "gitea-controller:41022:deadbeefcafe0001"
)
self.assertEqual(record["namespace"], "gitea-controller")
self.assertEqual(record["cohort_id"], COHORT_A)
self.assertEqual(record["cohort_source"], "explicit_env")
self.assertEqual(record["startup_head"], HEAD_A)
self.assertEqual(record["status"], "running")
def test_record_defaults_pid_to_the_current_process(self):
record = mfi.build_process_runtime_record(
namespace="gitea-author", profile="prgs-author", role="author"
)
self.assertEqual(record["pid"], os.getpid())
def test_each_boot_gets_a_distinct_runtime_id(self):
first = mfi.build_process_runtime_record(
namespace="gitea-author", profile="prgs-author", role="author", pid=1
)
second = mfi.build_process_runtime_record(
namespace="gitea-author", profile="prgs-author", role="author", pid=1
)
self.assertNotEqual(first["runtime_id"], second["runtime_id"])
def test_registered_at_uses_the_control_plane_timestamp_format(self):
record = mfi.build_process_runtime_record(
namespace="gitea-author", profile="prgs-author", role="author", pid=1
)
datetime.strptime(record["registered_at"], "%Y-%m-%dT%H:%M:%SZ")
class TestSummary(_AliveMixin, unittest.TestCase):
def test_healthy_summary_names_the_counts(self):
result = classify(healthy_rows())
self.assertIn("5 of 5", mfi.summarize(result))
def test_blocked_summary_repeats_the_blocked_reason(self):
rows = [r for r in healthy_rows() if r["profile"] != "prgs-merger"]
result = classify(rows)
self.assertIn(result["blocked_reason"], mfi.summarize(result))
class TestHeartbeatAge(_AliveMixin, unittest.TestCase):
def test_heartbeat_age_is_reported_for_diagnosis(self):
rows = healthy_rows()
stamp = (NOW - timedelta(minutes=30)).strftime("%Y-%m-%dT%H:%M:%SZ")
rows[0]["last_heartbeat_at"] = stamp
result = classify(rows)
member = [m for m in result["running_members"] if m["pid"] == rows[0]["pid"]][0]
self.assertEqual(member["heartbeat_age_seconds"], 1800)
def test_missing_heartbeat_is_reported_as_unknown_age(self):
rows = healthy_rows()
rows[0]["last_heartbeat_at"] = None
result = classify(rows)
member = [m for m in result["running_members"] if m["pid"] == rows[0]["pid"]][0]
self.assertIsNone(member["heartbeat_age_seconds"])
if __name__ == "__main__":
unittest.main()