Merge pull request 'fix(author): harden dirty-session rebind inventory and journal identity (#868)' (#869) from fix/issue-868-dirty-rebind-inventory-journal into master

Complete dirty-inventory revalidation immediately before and after
bind_session_lock so added, removed, or renamed paths fail closed.
Persist and validate full recovery-journal operation identity (remote,
org, repo, claimant identity, claimant profile) on execute, resume,
retry, and already_rebound. Add focused regression coverage and the
reconciler success-path integration test.

Closes #868.

gitea_mcp_server.py

@@ -440,13 +440,32 @@ def _session_author_lock_worktree() -> str | None:
 
     Used to derive the author mutation workspace when no explicit
     ``worktree_path`` or env binding is provided. Never invents a path.
+
+    #864: a session pointer whose owner PID is dead and is not this process
+    must not force workspace binding for other issues — rebind is required for
+    that issue, and a stale dead-owner pointer must not poison unrelated work.
     """
     try:
         lock = issue_lock_store.read_session_issue_lock() or {}
     except Exception:
         return None
     path = (lock.get("worktree_path") or "").strip()
-    return path or None
+    if not path:
+        return None
+    pid = lock.get("session_pid")
+    if pid is None:
+        pid = lock.get("pid")
+    try:
+        pid_i = int(pid) if pid is not None else None
+    except (TypeError, ValueError):
+        pid_i = None
+    if (
+        pid_i is not None
+        and pid_i != os.getpid()
+        and not issue_lock_store.is_process_alive(pid_i)
+    ):
+        return None
+    return path
 
 
 def _resolve_preflight_workspace_path(worktree_path: str | None = None) -> str:
@@ -2031,6 +2050,7 @@ import issue_lock_store  # noqa: E402
 import issue_lock_adoption  # noqa: E402
 import issue_lock_recovery  # noqa: E402
 import issue_lock_renewal  # noqa: E402
+import dirty_same_claimant_session_rebind  # noqa: E402  # #864
 import stacked_pr_support  # noqa: E402
 import merge_approval_gate  # noqa: E402
 import review_quarantine  # noqa: E402  # #695 contaminated formal-review quarantine
@@ -4342,6 +4362,263 @@ def gitea_lock_issue(
     return result
 
 
+@mcp.tool()
+def gitea_rebind_dirty_same_claimant_author_session(
+    issue_number: int,
+    branch_name: str,
+    worktree_path: str,
+    old_pid: int,
+    expected_local_head: str,
+    expected_remote_head: str,
+    expected_dirty_paths: list[str],
+    expected_fingerprints: dict,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+    dry_run: bool = False,
+    authorize_reconciler_execute: bool = False,
+) -> dict:
+    """Rebind a dirty registered issue worktree to this session (#864).
+
+    Sanctioned only when every pin agrees: same claimant, dead old_pid matching
+    the durable lock, matching local/remote heads, exact dirty path set, and
+    per-path sha256 fingerprints. Preserves every tracked/untracked byte.
+    Does not sync remote, create recovery worktrees, clean, reset, or move heads.
+
+    Role gate:
+    * author — must match the lock claimant identity/profile
+    * reconciler — execute only when ``authorize_reconciler_execute=True``
+    * reviewer/merger — always refuse
+
+    ``gitea.issue.comment`` (author map entry) is required for mutation; dry_run
+    still assesses fully but writes nothing. Permission alone is never ownership
+    proof — every pin is re-checked server-side.
+
+    Args:
+        issue_number: Tracking issue number on the durable lock.
+        branch_name: Exact locked branch name.
+        worktree_path: Registered dirty worktree path (must be under branches/).
+        old_pid: Dead owner PID recorded on the lock (must match session_pid/pid).
+        expected_local_head: Full local HEAD sha the caller observed.
+        expected_remote_head: Full remote-tracking HEAD sha the caller observed.
+        expected_dirty_paths: Exact set of dirty relative paths (tracked+untracked).
+        expected_fingerprints: Map of relative path -> sha256 hex of file bytes.
+        remote: Known instance — 'dadeschools' or 'prgs'.
+        host/org/repo: Optional target overrides (validated against binding).
+        dry_run: When true, assess only (no lock/session writes).
+        authorize_reconciler_execute: Reconciler-only execute gate.
+    """
+    role = _profile_role_kind(get_profile())
+    role_norm = (role or "").strip().lower()
+
+    # Permission: authors need comment; dry_run assess is reachable under read
+    # for diagnosis, but execute always needs comment. Reconciler execute also
+    # needs comment when authorized.
+    if dry_run:
+        read_block = _profile_operation_gate("gitea.read")
+        if read_block:
+            return {
+                "success": False,
+                "dry_run": True,
+                "reasons": read_block,
+                "permission_report": _permission_block_report("gitea.read"),
+            }
+    else:
+        blocked = _profile_permission_block(
+            task_capability_map.required_permission(
+                "rebind_dirty_same_claimant_author_session"
+            ),
+            issue_number=issue_number,
+            remote=remote,
+            host=host,
+            org=org,
+            repo=repo,
+            org_explicit=org is not None,
+            repo_explicit=repo is not None,
+        )
+        if blocked:
+            return blocked
+
+    if role_norm in {"reviewer", "merger"}:
+        return {
+            "success": False,
+            "dry_run": bool(dry_run),
+            "outcome": dirty_same_claimant_session_rebind.REFUSED,
+            "reasons": [
+                f"role '{role_norm}' cannot rebind dirty same-claimant author "
+                "sessions (fail closed)"
+            ],
+        }
+    if role_norm == "reconciler" and not authorize_reconciler_execute and not dry_run:
+        return {
+            "success": False,
+            "dry_run": False,
+            "outcome": dirty_same_claimant_session_rebind.REFUSED,
+            "reasons": [
+                "reconciler role requires authorize_reconciler_execute=True "
+                "to execute dirty same-claimant rebind (fail closed)"
+            ],
+        }
+
+    h, o, r = _resolve(remote, host, org, repo)
+    try:
+        identity = _authenticated_username(h)
+    except Exception:
+        identity = None
+    profile = get_profile()
+    profile_name = profile.get("profile_name")
+
+    existing = _load_existing_issue_lock(
+        remote=remote, org=o, repo=r, issue_number=issue_number
+    )
+    resolved_wt = os.path.realpath(os.path.abspath((worktree_path or "").strip()))
+    inv = dirty_same_claimant_session_rebind.collect_dirty_inventory(resolved_wt)
+
+    branch_res = subprocess.run(
+        ["git", "-C", resolved_wt, "branch", "--show-current"],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    current_branch = (branch_res.stdout or "").strip() or None
+    head_res = subprocess.run(
+        ["git", "-C", resolved_wt, "rev-parse", "HEAD"],
+        capture_output=True,
+        text=True,
+        check=False,
+    )
+    local_head = (head_res.stdout or "").strip() if head_res.returncode == 0 else None
+
+    # Observe remote-tracking head without network when possible.
+    remote_head = None
+    for ref in (
+        f"refs/remotes/origin/{branch_name}",
+        f"origin/{branch_name}",
+        f"refs/remotes/{remote}/{branch_name}",
+        f"{remote}/{branch_name}",
+    ):
+        rh = subprocess.run(
+            ["git", "-C", resolved_wt, "rev-parse", "--verify", "--quiet", ref],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+        if rh.returncode == 0 and (rh.stdout or "").strip():
+            remote_head = (rh.stdout or "").strip()
+            break
+    if remote_head is None:
+        # Fall back to caller's pin only for observation absence — assessment
+        # still requires pin==observed, so missing observation fails closed.
+        remote_head = None
+
+    # Competing live locks (other issues / other worktrees).
+    competing_live = []
+    for entry in issue_lock_store.list_live_locks():
+        competing_live.append(entry)
+
+    # Session pointers that claim this issue lock.
+    competing_sessions = []
+    lock_dir = issue_lock_store.default_lock_dir()
+    lock_path = issue_lock_store.lock_file_path(
+        remote=remote, org=o, repo=r, issue_number=issue_number, lock_dir=lock_dir
+    )
+    try:
+        for name in os.listdir(lock_dir):
+            if not name.startswith("session-") or not name.endswith(".json"):
+                continue
+            ptr = issue_lock_store.read_lock_file(os.path.join(lock_dir, name))
+            if not ptr:
+                continue
+            ptr_lock = str(ptr.get("lock_file_path") or "").strip()
+            if not ptr_lock:
+                continue
+            try:
+                same = os.path.realpath(ptr_lock) == os.path.realpath(lock_path)
+            except OSError:
+                same = ptr_lock == lock_path
+            if not same:
+                continue
+            try:
+                sess_pid = int(str(name)[len("session-") : -len(".json")])
+            except ValueError:
+                sess_pid = ptr.get("pid")
+            competing_sessions.append(
+                {
+                    "pid": sess_pid,
+                    "lock_file_path": ptr_lock,
+                    "live": issue_lock_store.is_process_alive(sess_pid),
+                }
+            )
+    except OSError:
+        pass
+
+    # Best-effort workflow-lease scan: any live lock file whose work_lease is a
+    # non-author workflow lease on this issue/branch counts as active.
+    workflow_lease_active = False
+    for path in issue_lock_store.iter_lock_files(lock_dir):
+        rec = issue_lock_store.read_lock_file(path)
+        if not rec:
+            continue
+        lease = rec.get("work_lease") if isinstance(rec.get("work_lease"), dict) else {}
+        op = str(lease.get("operation_type") or "")
+        if op and op != issue_lock_store.AUTHOR_ISSUE_WORK_LEASE:
+            if rec.get("issue_number") == issue_number or str(
+                rec.get("branch_name") or ""
+            ) == branch_name:
+                if issue_lock_store.is_lease_live(rec):
+                    workflow_lease_active = True
+                    break
+
+    repo_root = _canonical_local_git_root()
+    # permission_allowed reflects profile gate only — never ownership proof.
+    permission_allowed = True
+
+    result = dirty_same_claimant_session_rebind.apply_dirty_same_claimant_session_rebind(
+        remote=remote,
+        org=o,
+        repo=r,
+        issue_number=issue_number,
+        branch_name=branch_name,
+        worktree_path=resolved_wt,
+        claimant_identity=identity,
+        claimant_profile=profile_name,
+        old_pid=old_pid,
+        expected_local_head=expected_local_head,
+        expected_remote_head=expected_remote_head,
+        expected_dirty_paths=list(expected_dirty_paths or []),
+        expected_fingerprints=dict(expected_fingerprints or {}),
+        existing_lock=existing,
+        current_identity=identity,
+        current_profile=profile_name,
+        role_kind=role_norm or role,
+        current_pid=os.getpid(),
+        current_branch=current_branch,
+        local_head=local_head,
+        remote_head=remote_head,
+        dirty_inventory=inv,
+        competing_live_locks=competing_live,
+        competing_sessions=competing_sessions,
+        workflow_lease_active=workflow_lease_active,
+        authorize_reconciler_execute=bool(authorize_reconciler_execute),
+        permission_allowed=permission_allowed,
+        repo_root=repo_root,
+        dry_run=bool(dry_run),
+        lock_dir=lock_dir,
+    )
+    result["observed"] = {
+        "local_head": local_head,
+        "remote_head": remote_head,
+        "current_branch": current_branch,
+        "dirty_paths": inv.get("dirty_paths"),
+        "fingerprints": inv.get("fingerprints"),
+        "identity": identity,
+        "profile": profile_name,
+        "role_kind": role_norm,
+    }
+    return result
+
+
 @mcp.tool()
 def gitea_assess_work_issue_duplicate(
     issue_number: int,

issue_lock_provenance.py

@@ -16,11 +16,16 @@ ISSUE_LOCK_FILE = os.environ.get("GITEA_ISSUE_LOCK_FILE", "/tmp/gitea_issue_lock
 SOURCE_LOCK_ISSUE = "gitea_lock_issue"
 SOURCE_LOCK_ADOPTION = "gitea_lock_issue_adoption"
 SOURCE_OPERATOR_OVERRIDE = "operator_override"
+# #864: dirty-preserving same-claimant author-session rebind (dead owner PID).
+SOURCE_DIRTY_SAME_CLAIMANT_REBIND = (
+    "gitea_rebind_dirty_same_claimant_author_session"
+)
 
 SANCTIONED_LOCK_SOURCES = frozenset({
     SOURCE_LOCK_ISSUE,
     SOURCE_LOCK_ADOPTION,
     SOURCE_OPERATOR_OVERRIDE,
+    SOURCE_DIRTY_SAME_CLAIMANT_REBIND,
 })
 
 _OPERATOR_OVERRIDE_ENV = "GITEA_ISSUE_LOCK_OPERATOR_OVERRIDE"

task_capability_map.py

@@ -32,6 +32,17 @@ TASK_CAPABILITY_MAP: dict[str, dict[str, str]] = {
         "permission": "gitea.issue.comment",
         "role": "author",
     },
+    # #864: dirty-preserving same-claimant author-session rebind (dead owner PID).
+    # Author MCP tool path. Reconciler execute is gated inside the tool via
+    # authorize_reconciler_execute + role_kind checks (not this map entry).
+    "rebind_dirty_same_claimant_author_session": {
+        "permission": "gitea.issue.comment",
+        "role": "author",
+    },
+    "gitea_rebind_dirty_same_claimant_author_session": {
+        "permission": "gitea.issue.comment",
+        "role": "author",
+    },
     "set_issue_labels": {
         "permission": "gitea.issue.comment",
         "role": "author",