fix: resolve conflicts for PR #416

Merge current prgs/master into feat/issue-399-conflict-fix-leases.
Preserve reviewer PR lease gate (#407) before conflict-fix stale-head
gate (#399); document both as §26B and §26C. Align MCP and validator
tests with mandatory expected_head_sha and stale-head proof fields.

docs/llm-workflow-runbooks.md

@@ -281,6 +281,21 @@ same-issue/same-operation lease blocks duplicate work. An expired lease still
 blocks takeover until a recovery review records why the prior work is abandoned,
 completed, or unsafe to continue.
 
+**Issue-lock recovery (#447):** Do not manually seed, restore, or delete
+`/tmp/gitea_issue_lock.json` as a normal recovery path. That file is global
+shared state and manual writes can clobber another session's live lease. Use
+`sanctioned recovery` instead:
+
+1. `gitea_lock_issue` on a clean `branches/` worktree (normal path).
+2. Own-branch adoption via #442 when the issue's exact branch is already pushed.
+3. Operator override only when explicitly authorized — record
+   `External-state mutations` and `operator override proof` in the final report.
+
+`gitea_create_pr` rejects lock files that lack sanctioned `lock_provenance`
+metadata. Final-report validation blocks handoffs that hide lock read/write/delete
+under `External-state mutations: none` or mix author PR creation with reviewer
+approval in one run. See also #438 (global lock redesign).
+
 Remote branches matching the issue number are also treated as active work unless
 the recovery review proves the branch is abandoned or superseded. Never delete
 or clean up a branch when it has an active lease, dirty worktree, open PR, or is

docs/webui-local-dev.md

@@ -0,0 +1,89 @@
+# Internal web UI — local development (#426)
+
+Read-only MVP skeleton for the MCP Control Plane operator console. Gitea,
+MCP capability gates, and `skills/llm-project-workflow/` remain the source of
+truth; this UI only provides route stubs and layout.
+
+## Prerequisites
+
+- Python 3.11+ with project dependencies installed (`pip install -r requirements.txt`)
+- No secrets in repo, config, or client bundle
+
+## Start the server
+
+From the repository root (or an issue worktree):
+
+```bash
+./scripts/run-webui
+```
+
+Or directly:
+
+```bash
+python3 -m webui
+```
+
+Optional environment variables:
+
+| Variable | Default | Purpose |
+|----------|---------|---------|
+| `WEBUI_HOST` | `127.0.0.1` | Bind address (keep local for MVP) |
+| `WEBUI_PORT` | `8765` | Listen port |
+
+## Routes (MVP)
+
+| Path | Description |
+|------|-------------|
+| `/` | Home / operator overview |
+| `/health` | JSON liveness (`status`, `service`, `mode`, `timestamp`) |
+| `/queue` | Live PR and issue queue dashboard (#429) |
+| `/api/queue` | JSON queue export with pagination metadata |
+| `/projects` | Project registry list (#427) |
+| `/projects/{id}` | Project detail + onboarding checklist |
+| `/api/projects` | JSON registry export |
+| `/prompts` | Prompt library with per-prompt copy buttons (#428) |
+| `/api/prompts` | JSON prompt export with workflow hashes |
+| `/runtime` | Stub — MCP runtime health (#430) |
+| `/audit` | Stub — report audit paste (#431) |
+| `/worktrees` | Stub — hygiene dashboard (#432) |
+| `/leases` | Stub — lease visibility (#433) |
+
+All routes are GET-only. POST/PUT/PATCH/DELETE return `405` with
+`read-only-mvp`.
+
+## Project registry (#427)
+
+Versioned registry file: `webui/data/projects.registry.json` (schema version `1`).
+
+Override path with `WEBUI_PROJECT_REGISTRY` when operators keep a machine-local
+copy outside git. The registry stores repo identity, remotes, profile names,
+workflow/schema path references, and onboarding checklist steps — never tokens
+or credentials.
+
+Seed entry: **Gitea-Tools** on `https://gitea.prgs.cc` with `prgs-author`,
+`prgs-reviewer`, and `prgs-reconciler` profiles.
+
+## Prompt library (#428)
+
+Prompts are generated at load time from canonical workflow files under
+`skills/llm-project-workflow/workflows/`. SHA-256 hashes are computed from
+`WEBUI_REPO_ROOT` (defaults to the repository root). Prompt bodies are short
+copy/paste starters; canonical workflow files remain the only full policy
+source.
+
+## Live queue dashboard (#429)
+
+`/queue` loads open PRs and issues for the default registry project (seed:
+**Gitea-Tools** on `https://gitea.prgs.cc`) using existing `gitea_auth` read
+credentials. The UI surfaces pagination proof (returned count, pages fetched,
+`has_more`, `inventory_complete`) and classification badges (`claimed`,
+`blocked`, `in-review`, `duplicate`) when evidence exists.
+
+If credentials are missing or the fetch fails, the page shows an explicit error
+instead of an empty queue (fail closed).
+
+## Tests
+
+```bash
+pytest tests/test_webui_skeleton.py tests/test_webui_project_registry.py tests/test_webui_prompt_library.py tests/test_webui_queue_dashboard.py -q
+```

final_report_validator.py

@@ -11,6 +11,7 @@ import inspect
 import re
 from typing import Any, Callable
 
+import issue_lock_provenance
 from review_proofs import (
     HANDOFF_HEADING,
     assess_controller_handoff,
@@ -909,6 +910,54 @@ def _rule_reviewer_mutation_ledger(
     )
 
 
+def _rule_shared_issue_lock_external_state(report_text: str) -> list[dict[str, str]]:
+    result = issue_lock_provenance.assess_issue_lock_external_state_report(report_text)
+    if result.get("proven"):
+        return []
+    return _findings_from_reasons(
+        "shared.issue_lock_external_state",
+        result.get("reasons") or [],
+        field="External-state mutations",
+        severity="block",
+        safe_next_action=(
+            "disclose gitea_issue_lock.json read/write/delete under "
+            "External-state mutations; never claim none after lock seeding"
+        ),
+    )
+
+
+def _rule_shared_manual_lock_pr_override(report_text: str) -> list[dict[str, str]]:
+    result = issue_lock_provenance.assess_manual_lock_pr_without_override(report_text)
+    if result.get("proven"):
+        return []
+    return _findings_from_reasons(
+        "shared.manual_lock_pr_override",
+        result.get("reasons") or [],
+        field="External-state mutations",
+        severity="block",
+        safe_next_action=(
+            "use gitea_lock_issue or #442 adoption instead of manual lock seeding; "
+            "if operator override was authorized, cite override proof"
+        ),
+    )
+
+
+def _rule_shared_author_reviewer_same_run(report_text: str) -> list[dict[str, str]]:
+    result = issue_lock_provenance.assess_author_reviewer_same_run_report(report_text)
+    if result.get("proven"):
+        return []
+    return _findings_from_reasons(
+        "shared.author_reviewer_same_run",
+        result.get("reasons") or [],
+        field="Review mutations",
+        severity="block",
+        safe_next_action=(
+            "split author PR creation and reviewer approval across separate "
+            "sessions and handoffs"
+        ),
+    )
+
+
 def _rule_reviewer_review_mutation(
     report_text: str,
     *,
@@ -928,10 +977,17 @@ def _rule_reviewer_review_mutation(
     )
 
 
+_SHARED_ISSUE_LOCK_RULES = (
+    _rule_shared_issue_lock_external_state,
+    _rule_shared_manual_lock_pr_override,
+    _rule_shared_author_reviewer_same_run,
+)
+
 _RULES_BY_TASK: dict[str, list[Callable[..., list[dict[str, str]]]]] = {
     "review_pr": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
         _rule_reviewer_legacy_workspace_mutations,
         _rule_reviewer_vague_mutations_none,
         _rule_reviewer_mutation_categories,
@@ -953,6 +1009,7 @@ _RULES_BY_TASK: dict[str, list[Callable[..., list[dict[str, str]]]]] = {
     "reconcile_already_landed": [
         _rule_reconcile_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
         _rule_reconcile_stale_author_fields,
         _rule_reconcile_eligible_reviewed,
         _rule_reconcile_linked_issue_live,
@@ -964,26 +1021,31 @@ _RULES_BY_TASK: dict[str, list[Callable[..., list[dict[str, str]]]]] = {
     "author_issue": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
         _rule_reviewer_vague_mutations_none,
     ],
     "work_issue": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
         _rule_reviewer_vague_mutations_none,
         _rule_conflict_fix_push_proof,
     ],
     "issue_filing": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
     ],
     "inventory": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
         _rule_reconcile_pagination_proof,
     ],
     "issue_selection": [
         _rule_shared_controller_handoff,
         _rule_shared_email_disclosure,
+        *_SHARED_ISSUE_LOCK_RULES,
     ],
 }
 

gitea_mcp_server.py

@@ -440,10 +440,48 @@ def verify_preflight_purity(remote: str | None = None, worktree_path: str | None
             "Pre-flight order violation: Task capability (gitea_resolve_task_capability) has not been resolved (fail closed)"
         )
 
-    if worktree_path:
-        dirty_files = sorted(_parse_porcelain_entries(_get_workspace_porcelain(worktree_path)))
+    workspace = author_mutation_worktree.resolve_mutation_workspace(
+        worktree_path,
+        PROJECT_ROOT,
+        active_worktree_env=os.environ.get(ACTIVE_WORKTREE_ENV),
+        author_worktree_env=os.environ.get(AUTHOR_WORKTREE_ENV),
+    )
+    real_workspace = os.path.realpath(workspace)
+    real_root = os.path.realpath(PROJECT_ROOT)
+
+    if real_workspace != real_root:
+        if not _preflight_in_test_mode():
+            if not os.path.exists(real_workspace):
+                raise RuntimeError(
+                    f"Branches-only mutation guard (#274): worktree path '{workspace}' does not exist (fail closed)"
+                )
+            if not os.path.isdir(real_workspace):
+                raise RuntimeError(
+                    f"Branches-only mutation guard (#274): worktree path '{workspace}' is not a directory (fail closed)"
+                )
+            try:
+                res = subprocess.run(
+                    ["git", "-C", real_workspace, "rev-parse", "--git-common-dir"],
+                    capture_output=True,
+                    text=True,
+                    check=True,
+                )
+                common_dir = os.path.realpath(res.stdout.strip())
+                expected_dir = os.path.realpath(os.path.join(real_root, ".git"))
+                if common_dir != expected_dir:
+                    raise RuntimeError(
+                        f"Branches-only mutation guard (#274): worktree '{workspace}' does not belong to the target repository '{PROJECT_ROOT}' (fail closed)"
+                    )
+            except Exception as e:
+                if isinstance(e, RuntimeError):
+                    raise e
+                raise RuntimeError(
+                    f"Branches-only mutation guard (#274): worktree '{workspace}' is not a valid git repository (fail closed)"
+                )
+
+        dirty_files = sorted(_parse_porcelain_entries(_get_workspace_porcelain(workspace)))
         if dirty_files:
-            details = _preflight_workspace_details(worktree_path, dirty_files)
+            details = _preflight_workspace_details(workspace, dirty_files)
             raise RuntimeError(
                 "Pre-flight order violation: Active task workspace has tracked "
                 "file edits before mutation (fail closed). "
@@ -500,9 +538,12 @@ import task_capability_map  # noqa: E402
 import review_proofs  # noqa: E402
 import agent_temp_artifacts
 import issue_lock_worktree  # noqa: E402
+import issue_lock_provenance  # noqa: E402
 import already_landed_reconcile  # noqa: E402
 import author_mutation_worktree  # noqa: E402
 import issue_claim_heartbeat  # noqa: E402
+import issue_work_duplicate_gate  # noqa: E402
+import reviewer_pr_lease  # noqa: E402
 import merged_cleanup_reconcile  # noqa: E402
 import reconciler_profile  # noqa: E402
 import reconciliation_workflow  # noqa: E402
@@ -548,7 +589,7 @@ def _load_existing_issue_lock() -> dict | None:
     if not os.path.exists(ISSUE_LOCK_FILE):
         return None
     try:
-        with open(ISSUE_LOCK_FILE, encoding="utf-8") as f:
+        with open(ISSUE_LOCK_FILE, "r", encoding="utf-8") as f:
             data = json.load(f)
         return data if isinstance(data, dict) else None
     except Exception:
@@ -642,6 +683,119 @@ def _branch_entry_name(branch: dict | str) -> str:
     return str(branch.get("name") or branch.get("ref") or "")
 
 
+def _live_fetch_issue_duplicate_context(
+    h: str,
+    o: str,
+    r: str,
+    auth: str,
+    issue_number: int,
+) -> tuple[list[dict], list[str], dict]:
+    """Live open PRs, remote branch names, and claim state for one issue."""
+    base = repo_api_url(h, o, r)
+    open_prs = api_get_all(f"{base}/pulls?state=open", auth)
+    branches = api_get_all(f"{base}/branches", auth)
+    branch_names = [_branch_entry_name(b) for b in branches]
+    issue = api_request("GET", f"{base}/issues/{issue_number}", auth) or {}
+    comments = api_request(
+        "GET", f"{base}/issues/{issue_number}/comments", auth
+    ) or []
+    claim_entry = issue_claim_heartbeat.classify_issue_claim(
+        issue=issue,
+        comments=comments,
+        open_prs=open_prs,
+        branch_names=branch_names,
+    )
+    return open_prs, branch_names, claim_entry
+
+
+# Injectable duplicate-work context fetcher (#400). Production uses the live
+# Gitea API path above; unit tests patch this symbol instead of hitting the
+# network.
+issue_duplicate_context_fetcher = _live_fetch_issue_duplicate_context
+
+
+def _collect_issue_duplicate_context(
+    h: str,
+    o: str,
+    r: str,
+    auth: str,
+    issue_number: int,
+) -> tuple[list[dict], list[str], dict]:
+    return issue_duplicate_context_fetcher(h, o, r, auth, issue_number)
+
+
+def _assess_issue_duplicate_gate(
+    issue_number: int,
+    *,
+    h: str,
+    o: str,
+    r: str,
+    auth: str,
+    locked_branch: str | None = None,
+    phase: str,
+) -> dict:
+    open_prs, branch_names, claim_entry = _collect_issue_duplicate_context(
+        h, o, r, auth, issue_number
+    )
+    return issue_work_duplicate_gate.assess_work_issue_duplicate_gate(
+        issue_number,
+        open_prs=open_prs,
+        branch_names=branch_names,
+        claim_entry=claim_entry,
+        locked_branch=locked_branch,
+        phase=phase,
+    )
+
+
+def _duplicate_gate_block_response(gate: dict, **extra) -> dict:
+    out = {
+        "success": False,
+        "performed": False,
+        "reasons": list(gate.get("reasons") or []),
+        "duplicate_gate": gate,
+        "safe_next_action": gate.get("safe_next_action"),
+    }
+    out.update(extra)
+    return out
+
+
+def _enforce_locked_issue_duplicate_recheck(
+    remote: str,
+    phase: str,
+    *,
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+) -> dict | None:
+    """Re-check duplicate-work gates for the locked issue (#400)."""
+    lock_data = _load_existing_issue_lock()
+    if not lock_data:
+        return None
+    issue_number = int(lock_data.get("issue_number") or 0)
+    locked_branch = lock_data.get("branch_name")
+    if not issue_number:
+        return None
+    h, o, r = _resolve(
+        remote or lock_data.get("remote") or "dadeschools",
+        host or lock_data.get("host"),
+        org or lock_data.get("org"),
+        repo or lock_data.get("repo"),
+    )
+    auth = _auth(h)
+    gate = _assess_issue_duplicate_gate(
+        issue_number,
+        h=h,
+        o=o,
+        r=r,
+        auth=auth,
+        locked_branch=locked_branch,
+        phase=phase,
+    )
+    if gate.get("block"):
+        return gate
+    return None
+
+
 def _reveal_endpoints() -> bool:
     """Admin/debug opt-in (#120): include endpoint URLs and token source
     names in tool output. Off by default so normal LLM-facing responses
@@ -973,6 +1127,7 @@ def gitea_create_issue(
     repo: str | None = None,
     allow_duplicate_override: bool = False,
     split_from_issue: int | None = None,
+    worktree_path: str | None = None,
 ) -> dict:
     """Create a new issue on a Gitea repository.
 
@@ -985,6 +1140,7 @@ def gitea_create_issue(
         repo: Override the repository name.
         allow_duplicate_override: Operator-approved split after duplicate found.
         split_from_issue: Existing duplicate issue number when overriding.
+        worktree_path: Optional path to verify branches-only guard.
 
     Returns:
         dict with 'number' of the created issue ('url' only with the reveal opt-in).
@@ -1011,7 +1167,7 @@ def gitea_create_issue(
     )
     if blocked:
         return blocked
-    verify_preflight_purity(remote)
+    verify_preflight_purity(remote, worktree_path=worktree_path)
     base = repo_api_url(h, o, r)
     open_issues = api_get_all(f"{base}/issues?state=open&type=issues", auth)
     closed_issues = api_get_all(
@@ -1112,48 +1268,21 @@ def gitea_lock_issue(
             issue_lock_worktree.format_issue_lock_worktree_error(lock_assessment)
         )
 
-    # 2. Check if the issue already has an open PR (reuse protection)
     h, o, r = _resolve(remote, host, org, repo)
     auth = _auth(h)
-    url = f"{repo_api_url(h, o, r)}/pulls?state=open"
-
-    try:
-        prs = api_get_all(url, auth)
-    except Exception as e:
-        raise RuntimeError(f"Could not list open PRs to verify issue lock: {e}")
-
-    for pr in prs:
-        pr_head = pr.get("head", {}).get("ref", "")
-        pr_title = pr.get("title", "")
-        pr_body = pr.get("body", "")
-
-        if expected_pattern in pr_head:
-            raise ValueError(
-                f"Issue #{issue_number} is already tied to an open PR (PR #{pr.get('number')}, branch '{pr_head}') (fail closed)"
-            )
-
-        patterns = [
-            f"closes #{issue_number}",
-            f"fixes #{issue_number}",
-        ]
-        text_to_check = f"{pr_title} {pr_body}".lower()
-        if any(p in text_to_check for p in patterns):
-            raise ValueError(
-                f"Issue #{issue_number} is already tied to an open PR (PR #{pr.get('number')}) via Closes/Fixes reference (fail closed)"
-            )
-
-    branch_url = f"{repo_api_url(h, o, r)}/branches"
-    try:
-        branches = api_get_all(branch_url, auth)
-    except Exception as e:
-        raise RuntimeError(f"Could not list branches to verify issue lock: {e}")
-    for branch in branches:
-        name = _branch_entry_name(branch)
-        if expected_pattern in name:
-            raise ValueError(
-                f"Issue #{issue_number} already has matching branch '{name}' "
-                "(fail closed)"
-            )
+    duplicate_gate = _assess_issue_duplicate_gate(
+        issue_number,
+        h=h,
+        o=o,
+        r=r,
+        auth=auth,
+        locked_branch=branch_name,
+        phase=issue_work_duplicate_gate.PHASE_LOCK,
+    )
+    if duplicate_gate.get("block"):
+        raise ValueError("; ".join(duplicate_gate.get("reasons") or [
+            f"duplicate work gate blocked issue #{issue_number} (fail closed)"
+        ]))
 
     work_lease = _build_author_issue_work_lease(
         issue_number=issue_number,
@@ -1169,6 +1298,10 @@ def gitea_lock_issue(
         "repo": r,
         "worktree_path": resolved_worktree,
         "work_lease": work_lease,
+        "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+            tool="gitea_lock_issue",
+            claimant=work_lease.get("claimant"),
+        ),
     }
 
     try:
@@ -1199,6 +1332,39 @@ def gitea_lock_issue(
     return result
 
 
+@mcp.tool()
+def gitea_assess_work_issue_duplicate(
+    issue_number: int,
+    branch_name: str | None = None,
+    phase: str = issue_work_duplicate_gate.PHASE_LOCK,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+) -> dict:
+    """Read-only duplicate-work gate for author sessions before mutations (#400)."""
+    read_block = _profile_operation_gate("gitea.read")
+    if read_block:
+        return {
+            "success": False,
+            "performed": False,
+            "reasons": read_block,
+            "permission_report": _permission_block_report("gitea.read"),
+        }
+    h, o, r = _resolve(remote, host, org, repo)
+    auth = _auth(h)
+    gate = _assess_issue_duplicate_gate(
+        issue_number,
+        h=h,
+        o=o,
+        r=r,
+        auth=auth,
+        locked_branch=branch_name,
+        phase=phase,
+    )
+    return {"success": not gate.get("block"), **gate}
+
+
 @mcp.tool()
 def gitea_create_pr(
     title: str,
@@ -1259,6 +1425,14 @@ def gitea_create_pr(
     except Exception as e:
         raise RuntimeError(f"Could not read issue lock file: {e} (fail closed)")
 
+    lock_provenance_check = issue_lock_provenance.assess_lock_file_for_create_pr(
+        lock_data
+    )
+    if lock_provenance_check["block"]:
+        raise RuntimeError(
+            issue_lock_provenance.format_lock_provenance_error(lock_provenance_check)
+        )
+
     locked_issue = lock_data.get("issue_number")
     locked_branch = lock_data.get("branch_name")
     locked_worktree = lock_data.get("worktree_path")
@@ -1290,6 +1464,21 @@ def gitea_create_pr(
             f"PR title or body must contain 'Closes #{locked_issue}' or 'Fixes #{locked_issue}' exactly to ensure durable tracking (fail closed)"
         )
 
+    duplicate_block = _enforce_locked_issue_duplicate_recheck(
+        remote,
+        issue_work_duplicate_gate.PHASE_CREATE_PR,
+        host=host,
+        org=org,
+        repo=repo,
+    )
+    if duplicate_block:
+        return _duplicate_gate_block_response(
+            duplicate_block,
+            number=None,
+            issue_number=locked_issue,
+            branch_name=locked_branch,
+        )
+
     auth = _auth(h)
     url = f"{repo_api_url(h, o, r)}/pulls"
     payload = {"title": title, "body": body, "head": head, "base": base}
@@ -1829,6 +2018,7 @@ def init_review_decision_lock(remote: str | None, task: str | None):
         (os.environ.get(SESSION_PROFILE_LOCK_ENV) or "").strip()
         or profile_name
     )
+    reviewer_pr_lease.clear_session_lease()
     _save_review_decision_lock({
         "task": task,
         "remote": remote,
@@ -2315,6 +2505,20 @@ def _evaluate_pr_review_submission(
             result["permission_report"] = elig["permission_report"]
         return result
 
+    if live:
+        reasons.extend(_reviewer_pr_lease_gate(
+            pr_number=pr_number,
+            remote=remote,
+            host=host,
+            org=org,
+            repo=repo,
+            mutation=action,
+            live_head_sha=result.get("head_sha"),
+            pinned_head_sha=expected_head_sha,
+        ))
+        if reasons:
+            return result
+
     auth_user = result["authenticated_user"]
     pr_author = result["pr_author"]
     if action == "approve" and auth_user and pr_author and auth_user == pr_author:
@@ -2991,6 +3195,20 @@ def gitea_commit_files(
     if blocked:
         return blocked
 
+    duplicate_block = _enforce_locked_issue_duplicate_recheck(
+        remote,
+        issue_work_duplicate_gate.PHASE_COMMIT,
+        host=host,
+        org=org,
+        repo=repo,
+    )
+    if duplicate_block:
+        return _duplicate_gate_block_response(
+            duplicate_block,
+            commit="",
+            branch="",
+        )
+
     verify_preflight_purity(remote)
     processed_files, source_proofs = _prepare_commit_payload_files(files)
 
@@ -3153,6 +3371,19 @@ def gitea_merge_pr(
             result["permission_report"] = elig["permission_report"]
         return result
 
+    reasons.extend(_reviewer_pr_lease_gate(
+        pr_number=pr_number,
+        remote=remote,
+        host=host,
+        org=org,
+        repo=repo,
+        mutation="merge",
+        live_head_sha=result.get("head_sha"),
+        pinned_head_sha=expected_head_sha,
+    ))
+    if reasons:
+        return result
+
     # Gate 4 — reviewed head SHA is mandatory and must match live PR head (#399).
     actual_sha = result["head_sha"]
     if not (expected_head_sha or "").strip():
@@ -4471,6 +4702,261 @@ def _namespace_mutation_block(mutation_task: str, **extra_fields) -> dict | None
     return blocked
 
 
+def _fetch_pr_comments(
+    pr_number: int,
+    *,
+    remote: str,
+    host: str | None,
+    org: str | None,
+    repo: str | None,
+) -> list[dict]:
+    h, o, r = _resolve(remote, host, org, repo)
+    auth = _auth(h)
+    api = f"{repo_api_url(h, o, r)}/issues/{pr_number}/comments"
+    return api_request("GET", api, auth) or []
+
+
+def _reviewer_pr_lease_gate(
+    *,
+    pr_number: int,
+    remote: str,
+    host: str | None,
+    org: str | None,
+    repo: str | None,
+    mutation: str,
+    live_head_sha: str | None,
+    pinned_head_sha: str | None,
+) -> list[str]:
+    """Return block reasons when the session lacks an owned PR reviewer lease."""
+    session = reviewer_pr_lease.get_session_lease()
+    session_id = (session or {}).get("session_id")
+    identity = _authenticated_username(remote) or ""
+    try:
+        comments = _fetch_pr_comments(
+            pr_number, remote=remote, host=host, org=org, repo=repo)
+    except Exception as exc:
+        return [f"cannot fetch PR comments for lease gate: {_redact(str(exc))}"]
+    assessment = reviewer_pr_lease.assess_mutation_lease_gate(
+        pr_number=pr_number,
+        comments=comments,
+        reviewer_identity=identity,
+        session_id=session_id,
+        mutation=mutation,
+        live_head_sha=live_head_sha,
+        pinned_head_sha=pinned_head_sha,
+    )
+    return list(assessment.get("reasons") or []) if assessment.get("block") else []
+
+
+@mcp.tool()
+def gitea_acquire_reviewer_pr_lease(
+    pr_number: int,
+    worktree: str,
+    candidate_head: str | None = None,
+    target_branch: str = "master",
+    target_branch_sha: str | None = None,
+    issue_number: int | None = None,
+    session_id: str | None = None,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+) -> dict:
+    """Acquire a per-PR reviewer lease before review/merge mutations (#407)."""
+    read_block = _profile_operation_gate("gitea.read")
+    if read_block:
+        return {
+            "success": False,
+            "acquired": False,
+            "reasons": read_block,
+            "permission_report": _permission_block_report("gitea.read"),
+        }
+    comment_block = _profile_operation_gate("gitea.pr.comment")
+    if comment_block:
+        return {
+            "success": False,
+            "acquired": False,
+            "reasons": comment_block,
+            "permission_report": _permission_block_report("gitea.pr.comment"),
+        }
+
+    verify_preflight_purity(remote)
+    h, o, r = _resolve(remote, host, org, repo)
+    auth = _auth(h)
+    profile = get_profile()
+    identity = _authenticated_username(remote) or profile.get("username") or ""
+    sid = (session_id or "").strip() or reviewer_pr_lease.new_session_id()
+    repo_label = f"{o}/{r}"
+
+    comments = _fetch_pr_comments(
+        pr_number, remote=remote, host=host, org=org, repo=repo)
+    assessment = reviewer_pr_lease.assess_acquire_lease(
+        comments,
+        pr_number=pr_number,
+        reviewer_identity=identity,
+        profile=profile.get("profile_name") or "unknown",
+        session_id=sid,
+        repo=repo_label,
+        issue_number=issue_number,
+        worktree=worktree,
+        candidate_head=candidate_head,
+        target_branch=target_branch,
+        target_branch_sha=target_branch_sha,
+    )
+    if not assessment.get("acquire_allowed"):
+        return {
+            "success": False,
+            "acquired": False,
+            "reasons": assessment.get("reasons") or [],
+            "existing_lease": assessment.get("existing_lease"),
+        }
+
+    body = assessment["lease_body"]
+    comment_url = f"{repo_api_url(h, o, r)}/issues/{pr_number}/comments"
+    with _audited(
+        "comment_pr",
+        host=h,
+        remote=remote,
+        org=o,
+        repo=r,
+        pr_number=pr_number,
+        request_metadata={"source": "acquire_reviewer_pr_lease"},
+    ):
+        posted = api_request("POST", comment_url, auth, {"body": body})
+
+    session_lease = reviewer_pr_lease.record_session_lease({
+        "pr_number": pr_number,
+        "issue_number": issue_number,
+        "session_id": sid,
+        "reviewer_identity": identity,
+        "profile": profile.get("profile_name"),
+        "worktree": worktree,
+        "phase": "claimed",
+        "candidate_head": candidate_head,
+        "target_branch": target_branch,
+        "target_branch_sha": target_branch_sha,
+        "repo": repo_label,
+        "comment_id": posted.get("id"),
+    })
+    return {
+        "success": True,
+        "acquired": True,
+        "pr_number": pr_number,
+        "session_id": sid,
+        "comment_id": posted.get("id"),
+        "session_lease": session_lease,
+        "reasons": [],
+    }
+
+
+@mcp.tool()
+def gitea_heartbeat_reviewer_pr_lease(
+    pr_number: int,
+    phase: str,
+    worktree: str | None = None,
+    candidate_head: str | None = None,
+    target_branch_sha: str | None = None,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+) -> dict:
+    """Post a reviewer lease heartbeat / phase update on the PR thread (#407)."""
+    comment_block = _profile_operation_gate("gitea.pr.comment")
+    if comment_block:
+        return {
+            "success": False,
+            "posted": False,
+            "reasons": comment_block,
+            "permission_report": _permission_block_report("gitea.pr.comment"),
+        }
+    session = reviewer_pr_lease.get_session_lease()
+    if not session or session.get("pr_number") != pr_number:
+        return {
+            "success": False,
+            "posted": False,
+            "reasons": [
+                f"no in-session lease for PR #{pr_number}; acquire first "
+                "(fail closed)"
+            ],
+        }
+
+    verify_preflight_purity(remote)
+    h, o, r = _resolve(remote, host, org, repo)
+    auth = _auth(h)
+    body = reviewer_pr_lease.format_lease_body(
+        repo=f"{o}/{r}",
+        pr_number=pr_number,
+        issue_number=session.get("issue_number"),
+        reviewer_identity=session.get("reviewer_identity") or "",
+        profile=session.get("profile") or "unknown",
+        session_id=session.get("session_id") or reviewer_pr_lease.new_session_id(),
+        worktree=worktree or session.get("worktree") or "",
+        phase=phase,
+        candidate_head=candidate_head or session.get("candidate_head"),
+        target_branch=session.get("target_branch") or "master",
+        target_branch_sha=target_branch_sha or session.get("target_branch_sha"),
+    )
+    comment_url = f"{repo_api_url(h, o, r)}/issues/{pr_number}/comments"
+    with _audited(
+        "comment_pr",
+        host=h,
+        remote=remote,
+        org=o,
+        repo=r,
+        pr_number=pr_number,
+        request_metadata={"source": "heartbeat_reviewer_pr_lease", "phase": phase},
+    ):
+        posted = api_request("POST", comment_url, auth, {"body": body})
+
+    updated = reviewer_pr_lease.record_session_lease({
+        **session,
+        "phase": phase,
+        "worktree": worktree or session.get("worktree"),
+        "candidate_head": candidate_head or session.get("candidate_head"),
+        "target_branch_sha": target_branch_sha or session.get("target_branch_sha"),
+        "last_comment_id": posted.get("id"),
+    })
+    return {
+        "success": True,
+        "posted": True,
+        "pr_number": pr_number,
+        "phase": phase,
+        "comment_id": posted.get("id"),
+        "session_lease": updated,
+        "reasons": [],
+    }
+
+
+@mcp.tool()
+def gitea_assess_reviewer_pr_lease(
+    pr_number: int,
+    remote: str = "dadeschools",
+    host: str | None = None,
+    org: str | None = None,
+    repo: str | None = None,
+) -> dict:
+    """Read-only: assess active reviewer lease state for a PR (#407)."""
+    read_block = _profile_operation_gate("gitea.read")
+    if read_block:
+        return {
+            "success": False,
+            "reasons": read_block,
+            "permission_report": _permission_block_report("gitea.read"),
+        }
+    comments = _fetch_pr_comments(
+        pr_number, remote=remote, host=host, org=org, repo=repo)
+    active = reviewer_pr_lease.find_active_reviewer_lease(
+        comments, pr_number=pr_number)
+    return {
+        "success": True,
+        "pr_number": pr_number,
+        "active_lease": active,
+        "session_lease": reviewer_pr_lease.get_session_lease(),
+        "reasons": [],
+    }
+
+
 @mcp.tool()
 def gitea_list_issue_comments(
     issue_number: int,

issue_lock_provenance.py

@@ -0,0 +1,269 @@
+"""Issue-lock provenance and external-state disclosure (#447).
+
+Sanctioned locks are written only by ``gitea_lock_issue`` (or adoption recovery
+#442). Manual seeding of ``/tmp/gitea_issue_lock.json`` is unsafe and must be
+blocked at PR creation unless explicit operator override proof is recorded.
+"""
+
+from __future__ import annotations
+
+import os
+import re
+from datetime import datetime, timezone
+
+ISSUE_LOCK_FILE = os.environ.get("GITEA_ISSUE_LOCK_FILE", "/tmp/gitea_issue_lock.json")
+
+SOURCE_LOCK_ISSUE = "gitea_lock_issue"
+SOURCE_LOCK_ADOPTION = "gitea_lock_issue_adoption"
+SOURCE_OPERATOR_OVERRIDE = "operator_override"
+
+SANCTIONED_LOCK_SOURCES = frozenset({
+    SOURCE_LOCK_ISSUE,
+    SOURCE_LOCK_ADOPTION,
+    SOURCE_OPERATOR_OVERRIDE,
+})
+
+_OPERATOR_OVERRIDE_ENV = "GITEA_ISSUE_LOCK_OPERATOR_OVERRIDE"
+
+_ISSUE_LOCK_PATH_RE = re.compile(
+    r"(?:/tmp/)?gitea_issue_lock\.json",
+    re.IGNORECASE,
+)
+_LOCK_SEED_RE = re.compile(
+    r"(?:seed(?:ed|ing)?|restor(?:e|ed|ing)|wrote|written|write|programmatically|"
+    r"hand[- ]forg|manual(?:ly)?).{0,80}gitea_issue_lock",
+    re.IGNORECASE | re.DOTALL,
+)
+_LOCK_REMOVE_RE = re.compile(
+    r"(?:\brm\b|remove|deleted?|unlink).{0,80}gitea_issue_lock",
+    re.IGNORECASE | re.DOTALL,
+)
+_LOCK_READ_RE = re.compile(
+    r"(?:read|loaded?|parsed?).{0,80}gitea_issue_lock",
+    re.IGNORECASE | re.DOTALL,
+)
+_EXTERNAL_NONE_RE = re.compile(
+    r"external[- ]state mutations\s*:\s*none\b",
+    re.IGNORECASE,
+)
+_EXTERNAL_FIELD_RE = re.compile(
+    r"external[- ]state mutations\s*:\s*(.+)$",
+    re.IGNORECASE | re.MULTILINE,
+)
+_CLEANUP_ONLY_RE = re.compile(
+    r"cleanup mutations\s*:\s*(?:none|lock removed|removed issue lock)",
+    re.IGNORECASE,
+)
+_PR_CREATED_RE = re.compile(
+    r"(?:\bgitea_create_pr\b|PR\s*#\s*\d+\s+created|created\s+PR\s*#|opened\s+PR\s*#|"
+    r"PR\s+creation\s+(?:succeeded|complete))",
+    re.IGNORECASE,
+)
+_REVIEW_APPROVE_RE = re.compile(
+    r"(?:submitted\s+(?:['\"]approve['\"]|approve\s+review)|"
+    r"review decision\s*:\s*approve|approved\s+PR\s*#|gitea_review_pr.*approve)",
+    re.IGNORECASE,
+)
+_OVERRIDE_PROOF_RE = re.compile(
+    r"operator[- ]override\s+proof\s*:\s*(.+)$",
+    re.IGNORECASE | re.MULTILINE,
+)
+
+
+def _utc_now_iso() -> str:
+    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+
+
+def build_sanctioned_lock_provenance(
+    *,
+    tool: str,
+    source: str = SOURCE_LOCK_ISSUE,
+    claimant: dict | None = None,
+    adoption: dict | None = None,
+) -> dict:
+    """Return provenance metadata stored with a sanctioned lock write."""
+    entry = {
+        "source": source,
+        "written_at": _utc_now_iso(),
+        "written_by_tool": tool,
+        "lock_file_path": ISSUE_LOCK_FILE,
+    }
+    if claimant:
+        entry["claimant"] = claimant
+    if adoption:
+        entry["adoption"] = adoption
+    return entry
+
+
+def operator_override_requested() -> bool:
+    return os.environ.get(_OPERATOR_OVERRIDE_ENV, "").strip().lower() in {
+        "1",
+        "true",
+        "yes",
+    }
+
+
+def build_operator_override_provenance(*, reason: str, claimant: dict | None = None) -> dict:
+    text = (reason or "").strip()
+    if not text:
+        raise ValueError(
+            "operator override requires a non-empty override reason (fail closed)"
+        )
+    entry = build_sanctioned_lock_provenance(
+        tool="operator_override",
+        source=SOURCE_OPERATOR_OVERRIDE,
+        claimant=claimant,
+    )
+    entry["override_reason"] = text
+    return entry
+
+
+def assess_lock_file_for_create_pr(lock_data: dict | None) -> dict:
+    """Fail closed when lock file lacks sanctioned provenance (#447)."""
+    data = lock_data if isinstance(lock_data, dict) else {}
+    reasons: list[str] = []
+    provenance = data.get("lock_provenance")
+    if not isinstance(provenance, dict):
+        reasons.append(
+            "issue lock file lacks sanctioned lock_provenance; manual seeding is "
+            "not a normal recovery path — call gitea_lock_issue or use #442 adoption"
+        )
+        return _provenance_result(False, reasons, provenance)
+
+    source = str(provenance.get("source") or "").strip()
+    if source not in SANCTIONED_LOCK_SOURCES:
+        reasons.append(
+            f"issue lock provenance source '{source or '(missing)'}' is not sanctioned"
+        )
+
+    if source == SOURCE_OPERATOR_OVERRIDE and not str(
+        provenance.get("override_reason") or ""
+    ).strip():
+        reasons.append(
+            "operator_override lock provenance requires override_reason proof"
+        )
+
+    if not data.get("work_lease"):
+        reasons.append("issue lock file missing work_lease metadata")
+
+    if not str(provenance.get("written_by_tool") or "").strip():
+        reasons.append("issue lock provenance missing written_by_tool")
+
+    proven = not reasons
+    return _provenance_result(proven, reasons, provenance)
+
+
+def _provenance_result(proven: bool, reasons: list[str], provenance: dict | None) -> dict:
+    return {
+        "proven": proven,
+        "block": not proven,
+        "reasons": reasons,
+        "lock_provenance": provenance,
+    }
+
+
+def format_lock_provenance_error(assessment: dict) -> str:
+    reasons = "; ".join(assessment.get("reasons") or ["unknown lock provenance violation"])
+    return f"Issue lock provenance guard (#447): {reasons} (fail closed)"
+
+
+def _lock_activity_detected(text: str) -> dict[str, bool]:
+    body = text or ""
+    return {
+        "seed_or_restore": bool(_LOCK_SEED_RE.search(body)),
+        "remove": bool(_LOCK_REMOVE_RE.search(body)),
+        "read": bool(_LOCK_READ_RE.search(body)),
+    }
+
+
+def _external_state_discloses_lock(text: str) -> bool:
+    match = _EXTERNAL_FIELD_RE.search(text or "")
+    if not match:
+        return False
+    value = (match.group(1) or "").strip().lower()
+    if value in {"", "none", "n/a"}:
+        return False
+    return "lock" in value or "gitea_issue_lock" in value or "issue-lock" in value
+
+
+def assess_issue_lock_external_state_report(report_text: str) -> dict:
+    """Require explicit external-state disclosure for issue-lock mutations (#447)."""
+    text = report_text or ""
+    activity = _lock_activity_detected(text)
+    if not any(activity.values()):
+        return {"proven": True, "block": False, "reasons": [], "activity": activity}
+
+    reasons: list[str] = []
+    disclosed = _external_state_discloses_lock(text)
+
+    if activity["seed_or_restore"] and _EXTERNAL_NONE_RE.search(text):
+        reasons.append(
+            "report mentions seeding/restoring gitea_issue_lock.json but claims "
+            "External-state mutations: none"
+        )
+    elif activity["seed_or_restore"] and not disclosed:
+        reasons.append(
+            "report mentions issue-lock file activity but External-state mutations "
+            "does not disclose read/write of gitea_issue_lock.json"
+        )
+
+    if activity["remove"]:
+        if _EXTERNAL_NONE_RE.search(text):
+            reasons.append(
+                "report mentions removing gitea_issue_lock.json but claims "
+                "External-state mutations: none"
+            )
+        elif not disclosed and _CLEANUP_ONLY_RE.search(text):
+            reasons.append(
+                "report removes issue lock but classifies it as cleanup only; "
+                "record under External-state mutations"
+            )
+        elif not disclosed:
+            reasons.append(
+                "report mentions deleting issue lock without External-state "
+                "mutation disclosure"
+            )
+
+    proven = not reasons
+    return {
+        "proven": proven,
+        "block": not proven,
+        "reasons": reasons,
+        "activity": activity,
+    }
+
+
+def assess_manual_lock_pr_without_override(report_text: str) -> dict:
+    """Block reports that created a PR via manual lock seed without override proof."""
+    text = report_text or ""
+    seeded = bool(_LOCK_SEED_RE.search(text))
+    created = bool(_PR_CREATED_RE.search(text))
+    if not (seeded and created):
+        return {"proven": True, "block": False, "reasons": []}
+
+    if _OVERRIDE_PROOF_RE.search(text):
+        return {"proven": True, "block": False, "reasons": []}
+
+    return {
+        "proven": False,
+        "block": True,
+        "reasons": [
+            "report created/opened a PR after manual issue-lock seeding without "
+            "operator override proof"
+        ],
+    }
+
+
+def assess_author_reviewer_same_run_report(report_text: str) -> dict:
+    """Reviewer handoff must not create and approve the same PR in one run (#447)."""
+    text = report_text or ""
+    if not (_PR_CREATED_RE.search(text) and _REVIEW_APPROVE_RE.search(text)):
+        return {"proven": True, "block": False, "reasons": []}
+    return {
+        "proven": False,
+        "block": True,
+        "reasons": [
+            "report mixes author-side PR creation and reviewer approval in one "
+            "final handoff; split author and reviewer sessions"
+        ],
+    }

issue_work_duplicate_gate.py

@@ -0,0 +1,180 @@
+"""Early duplicate-work detection for author work-issue sessions (#400)."""
+
+from __future__ import annotations
+
+from typing import Any
+
+import issue_claim_heartbeat as claim_hb
+
+PHASE_LOCK = "lock_issue"
+PHASE_COMMIT = "commit"
+PHASE_PUSH = "push"
+PHASE_CREATE_PR = "create_pr"
+
+OUTCOME_DUPLICATE_PR_PREVENTED = "duplicate_pr_prevented"
+OUTCOME_DUPLICATE_BRANCH_PREVENTED = "duplicate_branch_prevented"
+OUTCOME_DUPLICATE_COMMIT_PREVENTED = "duplicate_commit_prevented"
+OUTCOME_DUPLICATE_WORK_NOT_PREVENTED = "duplicate_work_not_prevented"
+
+_ACTIVE_CLAIM_STATUSES = frozenset({"active", "awaiting_review"})
+
+
+def _issue_pattern(issue_number: int) -> str:
+    return f"issue-{int(issue_number)}"
+
+
+def _linked_open_pr(issue_number: int, open_prs: list[dict]) -> dict | None:
+    return claim_hb._linked_open_pr(issue_number, open_prs)
+
+
+def _matching_branches(
+    issue_number: int,
+    branch_names: list[str],
+    *,
+    locked_branch: str | None = None,
+) -> list[str]:
+    pattern = _issue_pattern(issue_number)
+    matches = [
+        name for name in (branch_names or [])
+        if pattern in (name or "").lower()
+    ]
+    if locked_branch:
+        locked = locked_branch.strip()
+        matches = [name for name in matches if name != locked]
+    return matches
+
+
+def assess_work_issue_duplicate_gate(
+    issue_number: int,
+    *,
+    open_prs: list[dict] | None = None,
+    branch_names: list[str] | None = None,
+    claim_entry: dict | None = None,
+    locked_branch: str | None = None,
+    phase: str = PHASE_LOCK,
+) -> dict[str, Any]:
+    """Fail closed when duplicate work is already in flight for an issue."""
+    reasons: list[str] = []
+    outcome = OUTCOME_DUPLICATE_WORK_NOT_PREVENTED
+    prs = list(open_prs or [])
+    branches = list(branch_names or [])
+    pattern = _issue_pattern(issue_number)
+
+    linked = _linked_open_pr(issue_number, prs)
+    if linked:
+        reasons.append(
+            f"open PR #{linked.get('number')} already covers issue "
+            f"#{issue_number} (fail closed)"
+        )
+        outcome = OUTCOME_DUPLICATE_PR_PREVENTED
+
+    conflicting_branches = _matching_branches(
+        issue_number, branches, locked_branch=locked_branch
+    )
+    if conflicting_branches:
+        names = ", ".join(conflicting_branches[:5])
+        reasons.append(
+            f"remote branch(es) already match issue pattern '{pattern}': "
+            f"{names} (fail closed)"
+        )
+        if outcome == OUTCOME_DUPLICATE_WORK_NOT_PREVENTED:
+            outcome = OUTCOME_DUPLICATE_BRANCH_PREVENTED
+
+    entry = claim_entry or {}
+    if entry.get("linked_open_pr") and not linked:
+        reasons.append(
+            f"claim inventory reports open PR #{entry['linked_open_pr']} "
+            f"for issue #{issue_number} (fail closed)"
+        )
+        outcome = OUTCOME_DUPLICATE_PR_PREVENTED
+
+    status = (entry.get("status") or "").strip().lower()
+    if status in _ACTIVE_CLAIM_STATUSES and not linked:
+        heartbeat = entry.get("latest_heartbeat") or {}
+        claim_branch = (heartbeat.get("branch") or "").strip()
+        if locked_branch and claim_branch and claim_branch != locked_branch:
+            reasons.append(
+                f"active claim lease on branch '{claim_branch}' blocks "
+                f"work on '{locked_branch}' for issue #{issue_number} "
+                "(fail closed)"
+            )
+            if outcome == OUTCOME_DUPLICATE_WORK_NOT_PREVENTED:
+                outcome = OUTCOME_DUPLICATE_BRANCH_PREVENTED
+        elif not locked_branch and status == "active":
+            reasons.append(
+                f"issue #{issue_number} has an active claim lease "
+                "(fail closed)"
+            )
+            if outcome == OUTCOME_DUPLICATE_WORK_NOT_PREVENTED:
+                outcome = OUTCOME_DUPLICATE_BRANCH_PREVENTED
+
+    if phase in {PHASE_COMMIT, PHASE_PUSH} and reasons:
+        if outcome == OUTCOME_DUPLICATE_PR_PREVENTED:
+            outcome = OUTCOME_DUPLICATE_COMMIT_PREVENTED
+        elif outcome == OUTCOME_DUPLICATE_BRANCH_PREVENTED:
+            outcome = OUTCOME_DUPLICATE_COMMIT_PREVENTED
+
+    block = bool(reasons)
+    return {
+        "block": block,
+        "performed": not block,
+        "issue_number": issue_number,
+        "phase": phase,
+        "outcome": outcome,
+        "linked_open_pr": linked.get("number") if linked else entry.get("linked_open_pr"),
+        "conflicting_branches": conflicting_branches,
+        "claim_status": status or None,
+        "reasons": reasons,
+        "safe_next_action": (
+            "stop before mutating; preserve local work and produce a "
+            "reconciliation handoff if a concurrent PR appeared after push"
+            if block and phase == PHASE_CREATE_PR
+            else "stop before mutating; do not commit or push duplicate work"
+            if block
+            else "proceed"
+        ),
+    }
+
+
+def assess_work_issue_duplicate_report(report_text: str) -> dict[str, Any]:
+    """Require explicit duplicate-work outcome wording in work-issue reports."""
+    text = (report_text or "").lower()
+    markers = {
+        OUTCOME_DUPLICATE_PR_PREVENTED: (
+            "duplicate pr prevented",
+            "duplicate_pr_prevented",
+        ),
+        OUTCOME_DUPLICATE_BRANCH_PREVENTED: (
+            "duplicate branch prevented",
+            "duplicate_branch_prevented",
+        ),
+        OUTCOME_DUPLICATE_COMMIT_PREVENTED: (
+            "duplicate commit prevented",
+            "duplicate_commit_prevented",
+        ),
+        OUTCOME_DUPLICATE_WORK_NOT_PREVENTED: (
+            "duplicate work not prevented",
+            "duplicate_work_not_prevented",
+            "no duplicate work",
+        ),
+    }
+    matched = [
+        key for key, phrases in markers.items()
+        if any(phrase in text for phrase in phrases)
+    ]
+    if len(matched) != 1:
+        return {
+            "complete": False,
+            "downgraded": True,
+            "reasons": [
+                "work-issue report must state exactly one duplicate-work "
+                "outcome (duplicate PR/branch/commit prevented, or "
+                "duplicate work not prevented)"
+            ],
+        }
+    return {
+        "complete": True,
+        "downgraded": False,
+        "outcome": matched[0],
+        "reasons": [],
+    }

review_proofs.py

@@ -3624,9 +3624,12 @@ def assess_work_issue_mode_isolation(report_text: str) -> dict:
 
 def assess_work_issue_final_report(report_text: str) -> dict:
     """#139: composite verifier for work-issue final reports."""
+    from issue_work_duplicate_gate import assess_work_issue_duplicate_report
+
     checks = {
         "workflow_source": assess_work_issue_workflow_source(report_text),
         "mode_isolation": assess_work_issue_mode_isolation(report_text),
+        "duplicate_work_outcome": assess_work_issue_duplicate_report(report_text),
     }
 
     reasons = []

reviewer_pr_lease.py

@@ -0,0 +1,382 @@
+"""Per-PR reviewer leases for safe parallel review sessions (#407)."""
+
+from __future__ import annotations
+
+import os
+import re
+import uuid
+from datetime import datetime, timedelta, timezone
+from typing import Any
+
+MARKER = "<!-- mcp-review-lease:v1 -->"
+
+_FIELD_RE = re.compile(
+    r"^\s*([a-z_]+)\s*:\s*(.+?)\s*$",
+    re.IGNORECASE | re.MULTILINE,
+)
+_FULL_SHA = re.compile(r"^[0-9a-f]{40}$", re.IGNORECASE)
+
+_TERMINAL_PHASES = frozenset({"done", "released", "blocked"})
+_ACTIVE_PHASES = frozenset({
+    "claimed",
+    "validating",
+    "approved",
+    "request-changes",
+    "merging",
+})
+
+DEFAULT_LEASE_TTL_MINUTES = 120
+STALE_WARNING_MINUTES = 30
+RECLAIMABLE_MINUTES = 60
+
+_SESSION_LEASE: dict[str, Any] | None = None
+
+
+def _parse_timestamp(value: str | None) -> datetime | None:
+    if not value:
+        return None
+    text = value.strip()
+    if text.endswith("Z"):
+        text = text[:-1] + "+00:00"
+    try:
+        parsed = datetime.fromisoformat(text)
+    except ValueError:
+        return None
+    if parsed.tzinfo is None:
+        return parsed.replace(tzinfo=timezone.utc)
+    return parsed.astimezone(timezone.utc)
+
+
+def _normalize_sha(value: str | None) -> str | None:
+    text = (value or "").strip().lower()
+    return text if text and _FULL_SHA.match(text) else None
+
+
+def _parse_pr_ref(value: str | None) -> int | None:
+    digits = re.sub(r"[^\d]", "", value or "")
+    return int(digits) if digits.isdigit() else None
+
+
+def new_session_id() -> str:
+    return f"{os.getpid()}-{uuid.uuid4().hex[:12]}"
+
+
+def format_lease_body(
+    *,
+    repo: str,
+    pr_number: int,
+    issue_number: int | None,
+    reviewer_identity: str,
+    profile: str,
+    session_id: str,
+    worktree: str,
+    phase: str,
+    candidate_head: str | None,
+    target_branch: str,
+    target_branch_sha: str | None,
+    last_activity: datetime | None = None,
+    expires_at: datetime | None = None,
+    blocker: str = "none",
+) -> str:
+    now = last_activity or datetime.now(timezone.utc)
+    expires = expires_at or (now + timedelta(minutes=DEFAULT_LEASE_TTL_MINUTES))
+    last_text = now.astimezone(timezone.utc).replace(microsecond=0).isoformat().replace(
+        "+00:00", "Z"
+    )
+    expires_text = expires.astimezone(timezone.utc).replace(microsecond=0).isoformat().replace(
+        "+00:00", "Z"
+    )
+    issue_text = f"#{issue_number}" if issue_number else "none"
+    lines = [
+        MARKER,
+        f"repo: {repo}",
+        f"pr: #{pr_number}",
+        f"issue: {issue_text}",
+        f"reviewer_identity: {reviewer_identity}",
+        f"profile: {profile}",
+        f"session_id: {session_id}",
+        f"worktree: {worktree}",
+        f"phase: {phase}",
+        f"candidate_head: {candidate_head or 'none'}",
+        f"target_branch: {target_branch}",
+        f"target_branch_sha: {target_branch_sha or 'none'}",
+        f"last_activity: {last_text}",
+        f"expires_at: {expires_text}",
+        f"blocker: {blocker}",
+    ]
+    return "\n".join(lines)
+
+
+def parse_lease_comment(body: str) -> dict[str, Any] | None:
+    text = body or ""
+    if MARKER not in text:
+        return None
+    fields: dict[str, str] = {}
+    for match in _FIELD_RE.finditer(text):
+        fields[match.group(1).strip().lower()] = match.group(2).strip()
+    if not fields:
+        return None
+    return {
+        "repo": fields.get("repo"),
+        "pr_number": _parse_pr_ref(fields.get("pr")),
+        "issue_number": _parse_pr_ref(fields.get("issue")),
+        "reviewer_identity": fields.get("reviewer_identity"),
+        "profile": fields.get("profile"),
+        "session_id": fields.get("session_id"),
+        "worktree": fields.get("worktree"),
+        "phase": (fields.get("phase") or "").strip().lower() or None,
+        "candidate_head": _normalize_sha(fields.get("candidate_head")),
+        "target_branch": fields.get("target_branch"),
+        "target_branch_sha": _normalize_sha(fields.get("target_branch_sha")),
+        "last_activity": fields.get("last_activity"),
+        "expires_at": fields.get("expires_at"),
+        "blocker": fields.get("blocker"),
+        "raw_fields": fields,
+    }
+
+
+def _lease_entries(comments: list[dict], *, pr_number: int) -> list[dict]:
+    entries: list[dict] = []
+    for comment in comments or []:
+        parsed = parse_lease_comment(comment.get("body") or "")
+        if not parsed:
+            continue
+        if parsed.get("pr_number") not in (None, pr_number):
+            continue
+        entries.append({
+            **parsed,
+            "comment_id": comment.get("id"),
+            "author": (comment.get("user") or {}).get("login") or comment.get("author"),
+            "created_at": comment.get("created_at"),
+            "updated_at": comment.get("updated_at"),
+        })
+    return entries
+
+
+def _lease_expired(lease: dict, *, now: datetime) -> bool:
+    expires_at = _parse_timestamp(lease.get("expires_at"))
+    return bool(expires_at and expires_at <= now)
+
+
+def _minutes_since_activity(lease: dict, *, now: datetime) -> float | None:
+    last = _parse_timestamp(lease.get("last_activity"))
+    if not last:
+        return None
+    return (now - last).total_seconds() / 60.0
+
+
+def classify_lease_freshness(lease: dict, *, now: datetime | None = None) -> str:
+    """Return active, stale_warning, reclaimable, expired, or terminal."""
+    now = now or datetime.now(timezone.utc)
+    phase = (lease.get("phase") or "").strip().lower()
+    if phase in _TERMINAL_PHASES:
+        return "terminal"
+    if _lease_expired(lease, now=now):
+        return "expired"
+    minutes = _minutes_since_activity(lease, now=now)
+    if minutes is None:
+        return "active"
+    if minutes >= RECLAIMABLE_MINUTES:
+        return "reclaimable"
+    if minutes >= STALE_WARNING_MINUTES:
+        return "stale_warning"
+    return "active"
+
+
+def find_active_reviewer_lease(
+    comments: list[dict],
+    *,
+    pr_number: int,
+    now: datetime | None = None,
+) -> dict[str, Any] | None:
+    """Newest non-terminal, unexpired lease for *pr_number*."""
+    now = now or datetime.now(timezone.utc)
+    for lease in reversed(_lease_entries(comments, pr_number=pr_number)):
+        phase = (lease.get("phase") or "").strip().lower()
+        if phase in _TERMINAL_PHASES:
+            continue
+        if _lease_expired(lease, now=now):
+            continue
+        if phase in _ACTIVE_PHASES or phase:
+            lease = dict(lease)
+            lease["freshness"] = classify_lease_freshness(lease, now=now)
+            return lease
+    return None
+
+
+def assess_acquire_lease(
+    comments: list[dict],
+    *,
+    pr_number: int,
+    reviewer_identity: str,
+    profile: str,
+    session_id: str,
+    repo: str,
+    issue_number: int | None,
+    worktree: str,
+    candidate_head: str | None,
+    target_branch: str,
+    target_branch_sha: str | None,
+    now: datetime | None = None,
+) -> dict[str, Any]:
+    """Fail closed when another session holds an active lease."""
+    now = now or datetime.now(timezone.utc)
+    reasons: list[str] = []
+    existing = find_active_reviewer_lease(comments, pr_number=pr_number, now=now)
+    if existing:
+        owner_session = (existing.get("session_id") or "").strip()
+        freshness = existing.get("freshness") or classify_lease_freshness(existing, now=now)
+        if owner_session and owner_session != session_id and freshness in {
+            "active", "stale_warning"
+        }:
+            reasons.append(
+                f"PR #{pr_number} already has active reviewer lease "
+                f"(session_id={owner_session}, phase={existing.get('phase')})"
+            )
+        elif owner_session and owner_session != session_id and freshness == "reclaimable":
+            reasons.append(
+                f"PR #{pr_number} lease is reclaimable but still held by "
+                f"session_id={owner_session}; explicit reclaim not implemented "
+                "(fail closed)"
+            )
+
+    if not (reviewer_identity or "").strip():
+        reasons.append("reviewer identity required for lease acquisition")
+    if not (session_id or "").strip():
+        reasons.append("session_id required for lease acquisition")
+    if not (worktree or "").strip():
+        reasons.append("worktree path required for lease acquisition")
+
+    allowed = not reasons
+    body = None
+    if allowed:
+        body = format_lease_body(
+            repo=repo,
+            pr_number=pr_number,
+            issue_number=issue_number,
+            reviewer_identity=reviewer_identity,
+            profile=profile,
+            session_id=session_id,
+            worktree=worktree,
+            phase="claimed",
+            candidate_head=candidate_head,
+            target_branch=target_branch,
+            target_branch_sha=target_branch_sha,
+            last_activity=now,
+        )
+    return {
+        "acquire_allowed": allowed,
+        "reasons": reasons,
+        "existing_lease": existing,
+        "lease_body": body,
+        "session_id": session_id,
+    }
+
+
+def record_session_lease(lease: dict[str, Any]) -> dict[str, Any]:
+    global _SESSION_LEASE
+    _SESSION_LEASE = dict(lease)
+    return dict(_SESSION_LEASE)
+
+
+def clear_session_lease() -> None:
+    global _SESSION_LEASE
+    _SESSION_LEASE = None
+
+
+def get_session_lease() -> dict[str, Any] | None:
+    return dict(_SESSION_LEASE) if _SESSION_LEASE else None
+
+
+def assess_mutation_lease_gate(
+    *,
+    pr_number: int,
+    comments: list[dict],
+    reviewer_identity: str,
+    session_id: str | None,
+    mutation: str,
+    live_head_sha: str | None,
+    pinned_head_sha: str | None,
+    now: datetime | None = None,
+) -> dict[str, Any]:
+    """Reviewer mutations require an owned, current PR lease."""
+    now = now or datetime.now(timezone.utc)
+    reasons: list[str] = []
+    session = get_session_lease()
+    active = find_active_reviewer_lease(comments, pr_number=pr_number, now=now)
+
+    if not session:
+        reasons.append(
+            f"no in-session reviewer lease recorded; acquire via "
+            f"gitea_acquire_reviewer_pr_lease before {mutation}"
+        )
+    elif session.get("pr_number") != pr_number:
+        reasons.append(
+            f"session lease is for PR #{session.get('pr_number')}, not #{pr_number}"
+        )
+    elif (session.get("session_id") or "") != (session_id or session.get("session_id")):
+        reasons.append("session lease session_id mismatch (fail closed)")
+
+    if active:
+        owner = (active.get("session_id") or "").strip()
+        if owner and session_id and owner != session_id:
+            reasons.append(
+                f"active PR lease owned by session_id={owner}; current session "
+                f"cannot {mutation}"
+            )
+        pinned = _normalize_sha(pinned_head_sha)
+        live = _normalize_sha(live_head_sha)
+        lease_head = active.get("candidate_head")
+        if pinned and live and pinned != live:
+            reasons.append(
+                "PR head changed during lease; stop and re-validate before "
+                f"reviewer {mutation}"
+            )
+        if lease_head and live and lease_head != live:
+            reasons.append(
+                "live PR head differs from lease candidate_head; refresh lease "
+                f"before {mutation}"
+            )
+        freshness = active.get("freshness") or classify_lease_freshness(active, now=now)
+        if freshness in {"expired", "reclaimable"}:
+            reasons.append(f"reviewer lease freshness is '{freshness}' (fail closed)")
+    else:
+        reasons.append(f"no active reviewer lease found on PR #{pr_number}")
+
+    allowed = not reasons
+    return {
+        "mutation_allowed": allowed,
+        "block": not allowed,
+        "reasons": reasons,
+        "active_lease": active,
+        "session_lease": session,
+    }
+
+
+def assess_lease_inventory(
+    comments_by_pr: dict[int, list[dict]],
+    *,
+    now: datetime | None = None,
+) -> dict[str, Any]:
+    """Summarize lease states across PR comment threads."""
+    now = now or datetime.now(timezone.utc)
+    active: list[dict] = []
+    stale: list[dict] = []
+    reclaimable: list[dict] = []
+    for pr_number, comments in (comments_by_pr or {}).items():
+        lease = find_active_reviewer_lease(comments, pr_number=pr_number, now=now)
+        if not lease:
+            continue
+        freshness = lease.get("freshness") or classify_lease_freshness(lease, now=now)
+        entry = {"pr_number": pr_number, "session_id": lease.get("session_id"), "freshness": freshness}
+        if freshness == "stale_warning":
+            stale.append(entry)
+        elif freshness == "reclaimable":
+            reclaimable.append(entry)
+        else:
+            active.append(entry)
+    return {
+        "active_review_leases": active,
+        "stale_review_leases": stale,
+        "reclaimable_review_leases": reclaimable,
+    }

scripts/run-webui

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -euo pipefail
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/.." && pwd)"
+cd "$repo_root"
+exec python3 -m webui "$@"

skills/llm-project-workflow/workflows/review-merge-pr.md

@@ -732,7 +732,27 @@ The final report must identify:
 * whether same-PR merge continuation was allowed
 * whether the run stopped as required
 
-## 26B. Conflict-fix lease and stale-head protection (#399)
+## 26B. Per-PR reviewer lease (#407)
+
+Parallel reviewer sessions are allowed only when each session holds a distinct,
+live PR lease.
+
+Before validation or review mutation on a selected PR:
+
+1. Call `gitea_acquire_reviewer_pr_lease` with worktree path, candidate head SHA,
+   and target branch SHA.
+2. Post heartbeats via `gitea_heartbeat_reviewer_pr_lease` before validation,
+   after validation, before review mutation, and before merge.
+3. Do not approve, request changes, or merge unless the in-session lease
+   matches the selected PR.
+
+If PR head or target branch advances during the lease, stop and refresh
+inventory before continuing.
+
+Final reports must include lease session id, acquisition proof, heartbeat
+status, and release/blocked status.
+
+## 26C. Conflict-fix lease and stale-head protection (#399)
 
 Before validating, approving, or merging a PR:
 

skills/llm-project-workflow/workflows/work-issue.md

@@ -297,6 +297,36 @@ Report:
 
 Do not create another branch/PR for the same issue unless the project explicitly allows taking over or updating existing work and exact capability is proven.
 
+### 10A. Duplicate-work gate phases (#400)
+
+Before any file edits, prove duplicate-work clearance with
+`gitea_assess_work_issue_duplicate` or `gitea_lock_issue` (which runs the same
+gate). The gate checks live:
+
+* open PRs linked to the issue (head branch or Closes/Fixes reference),
+* remote branches matching `issue-<number>`,
+* active claim leases from structured heartbeats.
+
+Re-check immediately before:
+
+* `gitea_commit_files` (commit),
+* branch push,
+* `gitea_create_pr` (PR creation).
+
+If a concurrent open PR appears after work begins:
+
+* before commit/push → stop and preserve local work without pushing,
+* after commit but before push → stop without pushing,
+* after push but before PR creation → stop and produce a reconciliation
+  handoff instead of opening a PR.
+
+Final reports must state exactly one duplicate-work outcome:
+
+* `duplicate PR prevented`
+* `duplicate branch prevented`
+* `duplicate commit prevented`
+* `duplicate work not prevented`
+
 ## 11. Claim or lock the issue before implementation
 
 Claim/lock the issue before implementation if the project provides a claim/lock mechanism.
@@ -740,6 +770,12 @@ Use only precise categories:
 * External-state mutations:
 * Read-only diagnostics:
 
+Issue-lock file (`/tmp/gitea_issue_lock.json`) read/write/delete is always an
+external-state mutation. Never claim `External-state mutations: none` after
+seeding, restoring, or removing that file. Manual lock seeding is not a normal
+recovery path (#447); use `gitea_lock_issue` or the #442 adoption recovery path
+instead. Link broader redesign: #438.
+
 `git fetch`, `git remote update`, and any command that updates refs must be listed under `Git ref mutations`, not read-only diagnostics.
 
 If `git reset --hard`, checkout, clean, worktree add/remove, merge simulation, merge abort, or similar commands occurred, report them under `Worktree/index mutations`.

tests/test_agent_temp_artifacts.py

@@ -80,7 +80,10 @@ class TestIssueLockArtifactWarning(unittest.TestCase):
     def tearDown(self):
         self._env_patcher.stop()
 
-    @patch("mcp_server.api_get_all", return_value=[])
+    @patch(
+        "mcp_server.issue_duplicate_context_fetcher",
+        return_value=([], [], {"status": "not_claimed"}),
+    )
     @patch("mcp_server._auth", return_value="token x")
     @patch("mcp_server._resolve", return_value=("h", "o", "r"))
     @patch("mcp_server.ISSUE_LOCK_FILE", new_callable=lambda: tempfile.mktemp())

tests/test_audit.py

@@ -286,6 +286,21 @@ class TestSimpleToolAudit(_AuditWiringBase):
 
 class TestGatedToolAudit(_AuditWiringBase):
 
+    def setUp(self):
+        super().setUp()
+        from tests.test_mcp_server import _install_owned_reviewer_lease
+        import reviewer_pr_lease
+
+        self._lease_patch = _install_owned_reviewer_lease(8)
+        self._lease_patch.start()
+        self._auth_identity_patch = patch(
+            "mcp_server._authenticated_username", return_value="reviewer-bot"
+        )
+        self._auth_identity_patch.start()
+        self.addCleanup(self._auth_identity_patch.stop)
+        self.addCleanup(self._lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
+
     def _pr(self, author, state="open", sha="abc123", mergeable=True):
         return {"user": {"login": author}, "state": state,
                 "head": {"sha": sha}, "mergeable": mergeable}
@@ -344,11 +359,22 @@ class TestGatedToolAudit(_AuditWiringBase):
                         GITEA_ALLOWED_OPERATIONS="read,review,approve")
         with patch.dict(os.environ, env, clear=True):
             from mcp_server import init_review_decision_lock, gitea_mark_final_review_decision
+            from tests.test_mcp_server import _install_owned_reviewer_lease
+            import reviewer_pr_lease
+
             init_review_decision_lock("prgs", "review_pr")
             gitea_mark_final_review_decision(8, "approve", remote="prgs")
-            r = gitea_submit_pr_review(pr_number=8, action="approve",
-                                       body="LGTM", remote="prgs",
-                                       final_review_decision_ready=True)
+            lease_patch = _install_owned_reviewer_lease(8)
+            lease_patch.start()
+            try:
+                r = gitea_submit_pr_review(
+                    pr_number=8, action="approve",
+                    body="LGTM", remote="prgs",
+                    final_review_decision_ready=True,
+                )
+            finally:
+                lease_patch.stop()
+                reviewer_pr_lease.clear_session_lease()
         self.assertTrue(r["performed"])
         recs = self._records()
         self.assertEqual(len(recs), 1)

tests/test_commit_files_capability.py

@@ -76,7 +76,14 @@ class CommitFilesCapabilityBase(unittest.TestCase):
         with open(self.config_path, "w", encoding="utf-8") as fh:
             fh.write(json.dumps(CONFIG))
 
+        self._dup_fetcher_patcher = patch(
+            "mcp_server.issue_duplicate_context_fetcher",
+            return_value=([], [], {"status": "not_claimed"}),
+        )
+        self._dup_fetcher_patcher.start()
+
     def tearDown(self):
+        self._dup_fetcher_patcher.stop()
         self._remotes.stop()
         mcp_server._IDENTITY_CACHE.clear()
         mcp_server._preflight_whoami_called, mcp_server._preflight_capability_called = (

tests/test_commit_payloads.py

@@ -67,6 +67,15 @@ class TestCommitPayloads(unittest.TestCase):
         self.locked_worktree_path = os.path.realpath(self.locked_worktree_dir.name)
 
         self.lock_file_path = "/tmp/gitea_issue_lock.json"
+        import issue_lock_provenance
+
+        work_lease = {
+            "operation_type": "author_issue_work",
+            "issue_number": 263,
+            "branch": "feat/issue-263-native-commit-payloads",
+            "claimant": {"username": "test-user", "profile": "test-author"},
+            "expires_at": "2999-01-01T00:00:00Z",
+        }
         self.lock_data = {
             "issue_number": 263,
             "branch_name": "feat/issue-263-native-commit-payloads",
@@ -74,6 +83,11 @@ class TestCommitPayloads(unittest.TestCase):
             "org": "Example-Org",
             "repo": "Example-Repo",
             "worktree_path": self.locked_worktree_path,
+            "work_lease": work_lease,
+            "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+                tool="gitea_lock_issue",
+                claimant=work_lease.get("claimant"),
+            ),
         }
         with open(self.lock_file_path, "w", encoding="utf-8") as fh:
             fh.write(json.dumps(self.lock_data))
@@ -84,7 +98,14 @@ class TestCommitPayloads(unittest.TestCase):
         mcp_server._preflight_whoami_called = True
         mcp_server._preflight_capability_called = True
 
+        self._dup_fetcher_patcher = patch(
+            "mcp_server.issue_duplicate_context_fetcher",
+            return_value=([], [], {"status": "not_claimed"}),
+        )
+        self._dup_fetcher_patcher.start()
+
     def tearDown(self):
+        self._dup_fetcher_patcher.stop()
         self._remotes.stop()
         mcp_server._IDENTITY_CACHE.clear()
 

tests/test_create_issue_workspace_guard.py

@@ -0,0 +1,145 @@
+import os
+import sys
+import unittest
+from pathlib import Path
+from unittest.mock import patch, MagicMock
+
+# Ensure we import from the repo root
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+import gitea_mcp_server as srv
+
+FAKE_AUTH = {"Authorization": "token test-token"}
+# Stable control checkout (parent of branches/), not the MCP server worktree root.
+CONTROL_CHECKOUT_ROOT = str(Path(__file__).resolve().parents[3])
+PROJECT_ROOT = srv.PROJECT_ROOT
+
+
+class TestCreateIssueWorkspaceGuard(unittest.TestCase):
+
+    def setUp(self):
+        # Reset preflight flags
+        srv._preflight_whoami_called = True
+        srv._preflight_capability_called = True
+        srv._preflight_resolved_role = "author"
+        srv._preflight_whoami_violation = False
+        srv._preflight_capability_violation = False
+        
+        # Disable early return in verify_preflight_purity for testing
+        self._orig_in_test = srv._preflight_in_test_mode
+        srv._preflight_in_test_mode = lambda: False
+
+    def tearDown(self):
+        srv._preflight_in_test_mode = self._orig_in_test
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    @patch("gitea_mcp_server.role_session_router.check_author_mutation_after_reviewer_stop", return_value=(True, []))
+    @patch("gitea_mcp_server.api_request")
+    @patch("gitea_mcp_server.api_get_all", return_value=[])
+    @patch("gitea_mcp_server.issue_lock_worktree.read_worktree_git_state", return_value={"current_branch": "feat/issue-1"})
+    def test_create_issue_stable_checkout_rejected(self, _git, _get_all, mock_api, _role, _ns, _prof, _auth):
+        # Without worktree_path/env hints, workspace resolves to PROJECT_ROOT. When that
+        # path is the stable control checkout (not under branches/), mutation must fail.
+        with patch.object(srv, "PROJECT_ROOT", CONTROL_CHECKOUT_ROOT):
+            with self.assertRaises(RuntimeError) as ctx:
+                srv.gitea_create_issue(title="Test issue", body="body text")
+        self.assertIn("stable control checkout", str(ctx.exception))
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    @patch("gitea_mcp_server.role_session_router.check_author_mutation_after_reviewer_stop", return_value=(True, []))
+    @patch("gitea_mcp_server.api_request")
+    @patch("gitea_mcp_server.api_get_all", return_value=[])
+    @patch("gitea_mcp_server.issue_lock_worktree.read_worktree_git_state", return_value={"current_branch": "feat/issue-1"})
+    @patch("os.path.exists", return_value=True)
+    @patch("os.path.isdir", return_value=True)
+    @patch("subprocess.run")
+    def test_create_issue_valid_worktree_succeeds(self, mock_run, mock_isdir, mock_exists, _git, _get_all, mock_api, _role, _ns, _prof, _auth):
+        # Mock subprocess.run for git --git-common-dir to return PROJECT_ROOT/.git
+        mock_res = MagicMock()
+        mock_res.stdout = f"{CONTROL_CHECKOUT_ROOT}/.git\n"
+        mock_run.return_value = mock_res
+
+        mock_api.return_value = {"number": 42, "html_url": "https://gitea.example.com/issues/42"}
+
+        # Provide a valid branches path under the control checkout root
+        valid_path = os.path.join(CONTROL_CHECKOUT_ROOT, "branches", "feat-issue-1")
+        
+        with patch.object(srv, "PROJECT_ROOT", CONTROL_CHECKOUT_ROOT):
+            with patch("gitea_mcp_server._get_workspace_porcelain", return_value=""):
+                res = srv.gitea_create_issue(
+                    title="Test issue", body="body", worktree_path=valid_path
+                )
+            
+        self.assertEqual(res["number"], 42)
+        mock_api.assert_called_once()
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    @patch("gitea_mcp_server.role_session_router.check_author_mutation_after_reviewer_stop", return_value=(True, []))
+    @patch("gitea_mcp_server.api_request")
+    @patch("gitea_mcp_server.api_get_all", return_value=[])
+    @patch("gitea_mcp_server.issue_lock_worktree.read_worktree_git_state", return_value={"current_branch": "feat/issue-1"})
+    def test_create_issue_missing_worktree_fails_closed(self, _git, _get_all, mock_api, _role, _ns, _prof, _auth):
+        # Path under branches/ but doesn't exist
+        missing_path = os.path.join(
+            CONTROL_CHECKOUT_ROOT, "branches", "nonexistent-worktree-path-999"
+        )
+        
+        with patch.object(srv, "PROJECT_ROOT", CONTROL_CHECKOUT_ROOT):
+            with self.assertRaises(RuntimeError) as ctx:
+                srv.gitea_create_issue(
+                    title="Test issue", body="body", worktree_path=missing_path
+                )
+        self.assertIn("does not exist (fail closed)", str(ctx.exception))
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    @patch("gitea_mcp_server.role_session_router.check_author_mutation_after_reviewer_stop", return_value=(True, []))
+    @patch("gitea_mcp_server.api_request")
+    @patch("gitea_mcp_server.api_get_all", return_value=[])
+    @patch("gitea_mcp_server.issue_lock_worktree.read_worktree_git_state", return_value={"current_branch": "feat/issue-1"})
+    @patch("os.path.exists", return_value=True)
+    @patch("os.path.isdir", return_value=True)
+    @patch("subprocess.run")
+    def test_create_issue_wrong_repo_fails_closed(self, mock_run, mock_isdir, mock_exists, _git, _get_all, mock_api, _role, _ns, _prof, _auth):
+        # Mock subprocess.run for git --git-common-dir to return a different path
+        mock_res = MagicMock()
+        mock_res.stdout = "/Users/jasonwalker/Development/some-other-repo/.git\n"
+        mock_run.return_value = mock_res
+
+        wrong_repo_path = os.path.join(CONTROL_CHECKOUT_ROOT, "branches", "feat-issue-1")
+
+        with patch.object(srv, "PROJECT_ROOT", CONTROL_CHECKOUT_ROOT):
+            with self.assertRaises(RuntimeError) as ctx:
+                srv.gitea_create_issue(
+                    title="Test issue", body="body", worktree_path=wrong_repo_path
+                )
+        self.assertIn("does not belong to the target repository", str(ctx.exception))
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    def test_create_issue_fails_without_whoami_preflight(self, _ns, _prof, _auth):
+        srv._preflight_whoami_called = False
+        with self.assertRaises(RuntimeError) as ctx:
+            srv.gitea_create_issue(title="Test issue", body="body")
+        self.assertIn("Identity (gitea_whoami) has not been verified", str(ctx.exception))
+
+    @patch("gitea_mcp_server._auth", return_value=FAKE_AUTH)
+    @patch("gitea_mcp_server._profile_permission_block", return_value=None)
+    @patch("gitea_mcp_server._namespace_mutation_block", return_value=None)
+    def test_create_issue_fails_without_capability_preflight(self, _ns, _prof, _auth):
+        srv._preflight_capability_called = False
+        with self.assertRaises(RuntimeError) as ctx:
+            srv.gitea_create_issue(title="Test issue", body="body")
+        self.assertIn("Task capability (gitea_resolve_task_capability) has not been resolved", str(ctx.exception))
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_final_report_validator.py

@@ -41,6 +41,10 @@ def _review_handoff(**overrides):
         "- Selected PR: #203",
         "- Reviewer eligibility: eligible",
         "- Pinned reviewed head: 0fdc8f582026b72a229d59a172c0a63ac4aaeaf9",
+        "- Reviewed head SHA: 0fdc8f582026b72a229d59a172c0a63ac4aaeaf9",
+        "- Final live head SHA before approval: 0fdc8f582026b72a229d59a172c0a63ac4aaeaf9",
+        "- Final live head SHA before merge: 0fdc8f582026b72a229d59a172c0a63ac4aaeaf9",
+        "- Push occurred during validation: no",
         "- Worktree path: branches/review-203",
         "- Worktree dirty: clean",
         "- Scratch worktree used: yes (branches/review-203)",

tests/test_issue_lock_provenance.py

@@ -0,0 +1,130 @@
+"""Tests for issue-lock provenance and external-state disclosure (#447)."""
+
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+import issue_lock_provenance as ilp  # noqa: E402
+from final_report_validator import assess_final_report_validator  # noqa: E402
+
+
+def _sanctioned_lock(**overrides):
+    work_lease = {
+        "operation_type": "author_issue_work",
+        "issue_number": 447,
+        "branch": "feat/issue-447-lock-provenance",
+        "claimant": {"username": "jcwalker3", "profile": "prgs-author"},
+        "expires_at": "2999-01-01T00:00:00Z",
+    }
+    data = {
+        "issue_number": 447,
+        "branch_name": "feat/issue-447-lock-provenance",
+        "work_lease": work_lease,
+        "lock_provenance": ilp.build_sanctioned_lock_provenance(
+            tool="gitea_lock_issue",
+            claimant=work_lease["claimant"],
+        ),
+    }
+    data.update(overrides)
+    return data
+
+
+class TestLockProvenanceForCreatePr(unittest.TestCase):
+    def test_sanctioned_lock_passes(self):
+        result = ilp.assess_lock_file_for_create_pr(_sanctioned_lock())
+        self.assertTrue(result["proven"])
+        self.assertFalse(result["block"])
+
+    def test_manual_seed_without_provenance_blocked(self):
+        result = ilp.assess_lock_file_for_create_pr(
+            {"issue_number": 420, "branch_name": "feat/x", "work_lease": {}}
+        )
+        self.assertTrue(result["block"])
+        self.assertIn("lock_provenance", result["reasons"][0])
+
+    def test_operator_override_requires_reason(self):
+        result = ilp.assess_lock_file_for_create_pr(
+            _sanctioned_lock(
+                lock_provenance=ilp.build_sanctioned_lock_provenance(
+                    tool="operator_override",
+                    source=ilp.SOURCE_OPERATOR_OVERRIDE,
+                )
+            )
+        )
+        self.assertTrue(result["block"])
+
+
+class TestExternalStateReportRules(unittest.TestCase):
+    def test_seed_with_external_none_blocked(self):
+        report = (
+            "Restored /tmp/gitea_issue_lock.json to unblock PR creation.\n"
+            "- External-state mutations: none\n"
+        )
+        result = ilp.assess_issue_lock_external_state_report(report)
+        self.assertTrue(result["block"])
+
+    def test_seed_with_disclosure_passes(self):
+        report = (
+            "Restored /tmp/gitea_issue_lock.json after MCP restart.\n"
+            "- External-state mutations: wrote /tmp/gitea_issue_lock.json\n"
+        )
+        result = ilp.assess_issue_lock_external_state_report(report)
+        self.assertTrue(result["proven"])
+
+    def test_remove_claimed_as_cleanup_only_blocked(self):
+        report = (
+            "rm /tmp/gitea_issue_lock.json after PR creation.\n"
+            "- Cleanup mutations: lock removed\n"
+            "- External-state mutations: none\n"
+        )
+        result = ilp.assess_issue_lock_external_state_report(report)
+        self.assertTrue(result["block"])
+
+    def test_manual_lock_pr_without_override_blocked(self):
+        report = (
+            "Programmatically seeded gitea_issue_lock.json then gitea_create_pr.\n"
+            "PR #444 created.\n"
+        )
+        result = ilp.assess_manual_lock_pr_without_override(report)
+        self.assertTrue(result["block"])
+
+    def test_author_reviewer_same_run_blocked(self):
+        report = (
+            "gitea_create_pr opened PR #444.\n"
+            "Submitted approve review on PR #444.\n"
+        )
+        result = ilp.assess_author_reviewer_same_run_report(report)
+        self.assertTrue(result["block"])
+
+
+class TestFinalReportValidatorIntegration(unittest.TestCase):
+    def test_work_issue_blocks_hidden_lock_mutation(self):
+        report = (
+            "## Controller Handoff\n"
+            "- Task: work issue #420\n"
+            "- External-state mutations: none\n"
+            "Restored /tmp/gitea_issue_lock.json before PR creation.\n"
+        )
+        result = assess_final_report_validator(report, "work_issue")
+        rule_ids = {f["rule_id"] for f in result["findings"]}
+        self.assertIn("shared.issue_lock_external_state", rule_ids)
+        self.assertTrue(result["blocked"])
+
+    def test_review_pr_blocks_create_and_approve(self):
+        report = (
+            "## Controller Handoff\n"
+            "- Task: review PR #444\n"
+            "- Review decision: approve\n"
+            "Created PR #444 via gitea_create_pr earlier in this run.\n"
+        )
+        result = assess_final_report_validator(report, "review_pr")
+        rule_ids = {f["rule_id"] for f in result["findings"]}
+        self.assertIn("shared.author_reviewer_same_run", rule_ids)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_issue_work_duplicate_gate.py

@@ -0,0 +1,264 @@
+"""Tests for early duplicate-work detection (#400)."""
+import json
+import os
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+import issue_lock_provenance
+import issue_work_duplicate_gate as dup_gate
+import mcp_server
+from issue_work_duplicate_gate import (
+    OUTCOME_DUPLICATE_BRANCH_PREVENTED,
+    OUTCOME_DUPLICATE_COMMIT_PREVENTED,
+    OUTCOME_DUPLICATE_PR_PREVENTED,
+    OUTCOME_DUPLICATE_WORK_NOT_PREVENTED,
+    PHASE_COMMIT,
+    PHASE_CREATE_PR,
+    PHASE_LOCK,
+    assess_work_issue_duplicate_gate,
+    assess_work_issue_duplicate_report,
+)
+
+
+class TestDuplicateGateAssessment(unittest.TestCase):
+    def test_clear_issue_passes(self):
+        result = assess_work_issue_duplicate_gate(
+            400,
+            open_prs=[],
+            branch_names=["feat/other-issue-99"],
+            claim_entry={"status": "not_claimed"},
+            locked_branch="feat/issue-400-duplicate-work-preflight",
+            phase=PHASE_LOCK,
+        )
+        self.assertFalse(result["block"])
+        self.assertEqual(result["outcome"], OUTCOME_DUPLICATE_WORK_NOT_PREVENTED)
+
+    def test_open_pr_blocks(self):
+        prs = [{
+            "number": 397,
+            "title": "feat: handoff",
+            "body": "Closes #395",
+            "head": {"ref": "feat/issue-395-proof-backed-review-handoff"},
+        }]
+        result = assess_work_issue_duplicate_gate(
+            395,
+            open_prs=prs,
+            branch_names=[],
+            phase=PHASE_LOCK,
+        )
+        self.assertTrue(result["block"])
+        self.assertEqual(result["outcome"], OUTCOME_DUPLICATE_PR_PREVENTED)
+
+    def test_conflicting_remote_branch_blocks(self):
+        result = assess_work_issue_duplicate_gate(
+            395,
+            open_prs=[],
+            branch_names=["feat/issue-395-proof-backed-handoff-claims"],
+            locked_branch="feat/issue-395-new-attempt",
+            phase=PHASE_LOCK,
+        )
+        self.assertTrue(result["block"])
+        self.assertEqual(result["outcome"], OUTCOME_DUPLICATE_BRANCH_PREVENTED)
+
+    def test_active_claim_on_other_branch_blocks(self):
+        result = assess_work_issue_duplicate_gate(
+            398,
+            open_prs=[],
+            branch_names=[],
+            claim_entry={
+                "status": "active",
+                "latest_heartbeat": {
+                    "branch": "feat/issue-398-validation-cwd-proof",
+                },
+            },
+            locked_branch="feat/issue-398-other-branch",
+            phase=PHASE_LOCK,
+        )
+        self.assertTrue(result["block"])
+
+    def test_commit_phase_maps_to_commit_outcome(self):
+        prs = [{
+            "number": 411,
+            "title": "x",
+            "body": "Closes #398",
+            "head": {"ref": "feat/issue-398-validation-cwd-proof"},
+        }]
+        result = assess_work_issue_duplicate_gate(
+            398,
+            open_prs=prs,
+            branch_names=[],
+            locked_branch="feat/issue-398-alt",
+            phase=PHASE_COMMIT,
+        )
+        self.assertTrue(result["block"])
+        self.assertEqual(result["outcome"], OUTCOME_DUPLICATE_COMMIT_PREVENTED)
+
+    def test_stale_claim_does_not_block_by_status_alone(self):
+        result = assess_work_issue_duplicate_gate(
+            400,
+            open_prs=[],
+            branch_names=[],
+            claim_entry={"status": "reclaimable", "reasons": ["stale"]},
+            locked_branch="feat/issue-400-duplicate-work-preflight",
+            phase=PHASE_LOCK,
+        )
+        self.assertFalse(result["block"])
+
+
+class TestDuplicateReportOutcome(unittest.TestCase):
+    def test_requires_exactly_one_outcome(self):
+        bad = assess_work_issue_duplicate_report("work finished")
+        self.assertFalse(bad["complete"])
+
+        good = assess_work_issue_duplicate_report(
+            "Duplicate work not prevented for issue #400."
+        )
+        self.assertTrue(good["complete"])
+        self.assertEqual(good["outcome"], OUTCOME_DUPLICATE_WORK_NOT_PREVENTED)
+
+
+class TestInjectableDuplicateFetcher(unittest.TestCase):
+    @patch("mcp_server.get_auth_header", return_value="token x")
+    def test_lock_issue_uses_injected_fetcher(self, _auth):
+        seen = {}
+
+        def fetcher(h, o, r, auth, issue_number):
+            seen["issue_number"] = issue_number
+            return [], [], {"status": "not_claimed"}
+
+        with patch(
+            "mcp_server.issue_duplicate_context_fetcher",
+            side_effect=fetcher,
+        ), patch(
+            "mcp_server.issue_lock_worktree.read_worktree_git_state",
+            return_value={
+                "current_branch": "master",
+                "porcelain_status": "",
+                "base_equivalent": True,
+            },
+        ), patch.dict(os.environ, {
+            "GITEA_ALLOWED_OPERATIONS": "gitea.issue.comment",
+        }, clear=True):
+            with patch.object(mcp_server, "ISSUE_LOCK_FILE", tempfile.mktemp()):
+                mcp_server.gitea_lock_issue(
+                    issue_number=400,
+                    branch_name="feat/issue-400-duplicate-work-preflight",
+                    remote="prgs",
+                )
+        self.assertEqual(seen["issue_number"], 400)
+
+
+class TestMcpDuplicateRecheck(unittest.TestCase):
+    def setUp(self):
+        self._dir = tempfile.TemporaryDirectory()
+        self.lock_path = os.path.join(self._dir.name, "gitea_issue_lock.json")
+        self._lock_patch = patch.object(
+            mcp_server, "ISSUE_LOCK_FILE", self.lock_path
+        )
+        self._lock_patch.start()
+        self._remotes = patch.dict(mcp_server.REMOTES, {
+            "prgs": {"host": "gitea.example.com", "org": "Example-Org",
+                     "repo": "Example-Repo"},
+        })
+        self._remotes.start()
+        mcp_server._IDENTITY_CACHE.clear()
+
+    def tearDown(self):
+        patch.stopall()
+        self._dir.cleanup()
+
+    def _write_lock(self, issue_number=400, branch="feat/issue-400-x"):
+        work_lease = {
+            "operation_type": "author_issue_work",
+            "issue_number": issue_number,
+            "branch": branch,
+            "claimant": {"username": "test-user", "profile": "test-author"},
+            "expires_at": "2999-01-01T00:00:00Z",
+        }
+        with open(self.lock_path, "w", encoding="utf-8") as fh:
+            json.dump({
+                "issue_number": issue_number,
+                "branch_name": branch,
+                "remote": "prgs",
+                "work_lease": work_lease,
+                "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+                    tool="gitea_lock_issue",
+                    claimant=work_lease.get("claimant"),
+                ),
+            }, fh)
+
+    @patch("mcp_server._assess_issue_duplicate_gate")
+    @patch("mcp_server.get_profile", return_value={
+        "profile_name": "test-author",
+        "allowed_operations": ["gitea.read", "gitea.repo.commit"],
+        "forbidden_operations": [],
+        "audit_label": "test-author",
+    })
+    @patch("mcp_server.get_auth_header", return_value="token x")
+    def test_commit_files_blocked_on_recheck(self, _auth, _profile, mock_gate):
+        self._write_lock()
+        mock_gate.return_value = {
+            "block": True,
+            "reasons": ["open PR #412 already covers issue #400"],
+            "outcome": OUTCOME_DUPLICATE_COMMIT_PREVENTED,
+            "safe_next_action": "stop",
+        }
+        mcp_server.record_preflight_check("whoami")
+        mcp_server.record_preflight_check("capability", resolved_role="author")
+        with patch(
+            "mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
+            return_value=(True, []),
+        ):
+            result = mcp_server.gitea_commit_files(
+                files=[{
+                    "operation": "create",
+                    "path": "a.txt",
+                    "content_plain": "hi",
+                }],
+                message="test",
+                remote="prgs",
+            )
+        self.assertFalse(result["success"])
+        self.assertIn("duplicate_gate", result)
+
+    @patch("mcp_server._assess_issue_duplicate_gate")
+    @patch("mcp_server.get_profile", return_value={
+        "profile_name": "test-author",
+        "allowed_operations": ["gitea.read", "gitea.pr.create"],
+        "forbidden_operations": [],
+        "audit_label": "test-author",
+    })
+    @patch("mcp_server.get_auth_header", return_value="token x")
+    def test_create_pr_returns_handoff_on_duplicate(self, _auth, _profile, mock_gate):
+        self._write_lock()
+        mock_gate.return_value = {
+            "block": True,
+            "reasons": ["open PR #412 already covers issue #400"],
+            "outcome": OUTCOME_DUPLICATE_PR_PREVENTED,
+            "safe_next_action": "reconciliation handoff",
+        }
+        mcp_server.record_preflight_check("whoami")
+        mcp_server.record_preflight_check("capability", resolved_role="author")
+        with patch(
+            "mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
+            return_value=(True, []),
+        ):
+            result = mcp_server.gitea_create_pr(
+                title="feat: x (Closes #400)",
+                head="feat/issue-400-x",
+                base="master",
+                body="Closes #400",
+                remote="prgs",
+            )
+        self.assertFalse(result["success"])
+        self.assertIsNone(result.get("number"))
+        self.assertIn("duplicate_gate", result)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_mcp_server.py

@@ -60,6 +60,7 @@ def _mark_request_changes_ready(pr_number=8, **kwargs):
     suppression feedback fetch stubbed to 'no existing blocker'."""
     with patch("mcp_server.gitea_get_pr_review_feedback",
                return_value=dict(_NO_BLOCKER_FEEDBACK)):
+        kwargs.setdefault("expected_head_sha", "abc123")
         return gitea_mark_final_review_decision(
             pr_number, "request_changes", **kwargs)
 
@@ -79,6 +80,65 @@ def _visible_approval_reviews(reviewer="reviewer-bot", sha="abc123"):
     return [_formal_review(reviewer, "APPROVED", sha=sha)]
 
 
+_DEFAULT_LEASE_SESSION = "mcp-test-reviewer-lease"
+_NO_PR_WORK_LEASE_BLOCK = {"block": False, "reasons": [], "mutation_allowed": True}
+
+
+def _reviewer_lease_comment(
+    pr_number,
+    *,
+    session_id=_DEFAULT_LEASE_SESSION,
+    head_sha="abc123",
+    reviewer="reviewer-bot",
+):
+    from datetime import datetime, timezone
+
+    import reviewer_pr_lease
+
+    body = reviewer_pr_lease.format_lease_body(
+        repo="Scaled-Tech-Consulting/Gitea-Tools",
+        pr_number=pr_number,
+        issue_number=407,
+        reviewer_identity=reviewer,
+        profile="gitea-reviewer",
+        session_id=session_id,
+        worktree="branches/review-test",
+        phase="claimed",
+        candidate_head=head_sha,
+        target_branch="master",
+        target_branch_sha="b" * 40,
+        last_activity=datetime.now(timezone.utc),
+    )
+    return {"id": 9001, "body": body, "user": {"login": reviewer}}
+
+
+def _install_owned_reviewer_lease(
+    pr_number,
+    *,
+    session_id=_DEFAULT_LEASE_SESSION,
+    head_sha="abc123",
+):
+    import reviewer_pr_lease
+
+    reviewer_pr_lease.clear_session_lease()
+    reviewer_pr_lease.record_session_lease({
+        "pr_number": pr_number,
+        "session_id": session_id,
+        "candidate_head": head_sha,
+        "target_branch": "master",
+    })
+    return patch(
+        "mcp_server._fetch_pr_comments",
+        return_value=[
+            _reviewer_lease_comment(
+                pr_number,
+                session_id=session_id,
+                head_sha=head_sha,
+            )
+        ],
+    )
+
+
 # Issue-write tools are profile-gated (#69).
 ISSUE_WRITE_ENV = {
     "GITEA_ALLOWED_OPERATIONS": (
@@ -101,17 +161,36 @@ ISSUE_LOCK_FILE = "/tmp/gitea_issue_lock.json"
 
 
 def _sample_issue_lock(issue_number=123, branch_name="feat/x", **overrides):
+    import issue_lock_provenance
+
+    work_lease = {
+        "operation_type": "author_issue_work",
+        "issue_number": issue_number,
+        "branch": branch_name,
+        "claimant": {"username": "test-user", "profile": "test-author"},
+        "expires_at": "2999-01-01T00:00:00Z",
+    }
     record = {
         "issue_number": issue_number,
         "branch_name": branch_name,
         "remote": "dadeschools",
         "org": "Scaled-Tech-Consulting",
         "repo": "Gitea-Tools",
+        "work_lease": work_lease,
+        "lock_provenance": issue_lock_provenance.build_sanctioned_lock_provenance(
+            tool="gitea_lock_issue",
+            claimant=work_lease.get("claimant"),
+        ),
     }
     record.update(overrides)
     return record
 
 
+def _clear_duplicate_context_fetcher(*_args, **_kwargs):
+    """Default injectable duplicate-work context for lock/create_pr tests."""
+    return [], [], {"status": "not_claimed"}
+
+
 # ---------------------------------------------------------------------------
 # Create Issue
 # ---------------------------------------------------------------------------
@@ -166,13 +245,17 @@ class TestCreateIssue(unittest.TestCase):
 # ---------------------------------------------------------------------------
 class TestCreatePR(unittest.TestCase):
 
+    @patch(
+        "mcp_server.issue_duplicate_context_fetcher",
+        return_value=([], [], {"status": "not_claimed"}),
+    )
     @patch("mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
            return_value=(True, []))
     @patch("mcp_server.api_request")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
     @patch("os.path.exists", return_value=True)
     @patch("builtins.open")
-    def test_creates_pr(self, mock_open, mock_exists, _auth, mock_api, _role):
+    def test_creates_pr(self, mock_open, mock_exists, _auth, mock_api, _role, _dup_fetcher):
         lock_json = json.dumps(_sample_issue_lock(issue_number=123, branch_name="feat/x"))
         mock_open.return_value.__enter__.return_value.read.return_value = lock_json
         mock_api.return_value = {"number": 3, "html_url": "https://example.com/pulls/3"}
@@ -187,13 +270,17 @@ class TestCreatePR(unittest.TestCase):
         self.assertEqual(payload["base"], "main")
         self.assertIn("Closes #123", payload["title"])
 
+    @patch(
+        "mcp_server.issue_duplicate_context_fetcher",
+        return_value=([], [], {"status": "not_claimed"}),
+    )
     @patch("mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
            return_value=(True, []))
     @patch("mcp_server.api_request")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
     @patch("os.path.exists", return_value=True)
     @patch("builtins.open")
-    def test_create_pr_reveal_opt_in_includes_url(self, mock_open, mock_exists, _auth, mock_api, _role):
+    def test_create_pr_reveal_opt_in_includes_url(self, mock_open, mock_exists, _auth, mock_api, _role, _dup_fetcher):
         lock_json = json.dumps(_sample_issue_lock(issue_number=123, branch_name="feat/x"))
         mock_open.return_value.__enter__.return_value.read.return_value = lock_json
         mock_api.return_value = {"number": 3, "html_url": "https://example.com/pulls/3"}
@@ -512,6 +599,30 @@ class TestViewPR(unittest.TestCase):
 class TestMergePR(unittest.TestCase):
     """Gated merge workflow (#16). gitea_merge_pr is the only merge path."""
 
+    def setUp(self):
+        import reviewer_pr_lease
+
+        self._lease_patch = _install_owned_reviewer_lease(8)
+        self._lease_patch.start()
+        self._auth_identity_patch = patch(
+            "mcp_server._authenticated_username", return_value="reviewer-bot"
+        )
+        self._auth_identity_patch.start()
+        self.addCleanup(self._auth_identity_patch.stop)
+        self.addCleanup(self._lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
+        self._pr_lease_comments_patch = patch(
+            "mcp_server._list_pr_lease_comments", return_value=[]
+        )
+        self._pr_lease_comments_patch.start()
+        self.addCleanup(self._pr_lease_comments_patch.stop)
+        self._pr_work_lease_patch = patch(
+            "mcp_server._pr_work_lease_reviewer_block",
+            return_value=dict(_NO_PR_WORK_LEASE_BLOCK),
+        )
+        self._pr_work_lease_patch.start()
+        self.addCleanup(self._pr_work_lease_patch.stop)
+
     def _pr(self, author, state="open", sha="abc123", mergeable=True):
         return {
             "user": {"login": author},
@@ -584,7 +695,8 @@ class TestMergePR(unittest.TestCase):
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
                 pr_number=8, confirmation=self._confirm(8),
-                expected_changed_files=["b.py", "a.py"], remote="prgs")
+                expected_changed_files=["b.py", "a.py"],
+                expected_head_sha="abc123", remote="prgs")
         self.assertTrue(r["performed"])
 
     # -- read-back / cleanup surfacing (#98) -----------------------------------
@@ -602,8 +714,10 @@ class TestMergePR(unittest.TestCase):
         env = {"GITEA_PROFILE_NAME": "gitea-merger",
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
-            r = gitea_merge_pr(pr_number=8, confirmation=self._confirm(8),
-                               remote="prgs")
+            r = gitea_merge_pr(
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         # The merge itself is still reported performed/successful.
         self.assertTrue(r["performed"])
         self.assertEqual(r["merge_result"], "PR #8 merged via 'merge'.")
@@ -631,8 +745,10 @@ class TestMergePR(unittest.TestCase):
         env = {"GITEA_PROFILE_NAME": "gitea-merger",
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
-            r = gitea_merge_pr(pr_number=8, confirmation=self._confirm(8),
-                               remote="prgs")
+            r = gitea_merge_pr(
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         self.assertTrue(r["performed"])
         self.assertEqual(r["merge_commit"], "c9")
         self.assertTrue(r["cleanup_status"].startswith("skipped (cleanup error:"))
@@ -646,7 +762,7 @@ class TestMergePR(unittest.TestCase):
         env = {"GITEA_PROFILE_NAME": "gitea-merger",
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
-            r = gitea_merge_pr(pr_number=8, confirmation="", remote="prgs")
+            r = gitea_merge_pr(pr_number=8, confirmation="", expected_head_sha="abc123", remote="prgs")
         self.assertFalse(r["performed"])
         self.assertTrue(any("explicit confirmation required" in x for x in r["reasons"]))
         mock_api.assert_not_called()
@@ -657,7 +773,7 @@ class TestMergePR(unittest.TestCase):
         env = {"GITEA_PROFILE_NAME": "gitea-merger",
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
-            r = gitea_merge_pr(pr_number=8, confirmation="MERGE PR 9", remote="prgs")
+            r = gitea_merge_pr(pr_number=8, confirmation="MERGE PR 9", expected_head_sha="abc123", remote="prgs")
         self.assertFalse(r["performed"])
         mock_api.assert_not_called()
 
@@ -772,9 +888,11 @@ class TestMergePR(unittest.TestCase):
                 pr_number=8, confirmation=self._confirm(8),
                 expected_head_sha="deadbeef", remote="prgs")
         self.assertFalse(r["performed"])
-        self.assertIn(
-            "expected head SHA does not match current PR head (fail closed)",
-            r["reasons"])
+        self.assertTrue(any(
+            "expected head SHA does not match current PR head (fail closed)" in reason
+            or "PR head changed during lease" in reason
+            for reason in r["reasons"]
+        ))
         self._assert_no_merge_call(mock_api)
 
     @patch("mcp_server.api_request")
@@ -789,7 +907,8 @@ class TestMergePR(unittest.TestCase):
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
                 pr_number=8, confirmation=self._confirm(8),
-                expected_changed_files=["a.py", "b.py"], remote="prgs")
+                expected_changed_files=["a.py", "b.py"],
+                expected_head_sha="abc123", remote="prgs")
         self.assertFalse(r["performed"])
         self.assertIn(
             "PR changed files do not match expected_changed_files (fail closed)",
@@ -802,7 +921,7 @@ class TestMergePR(unittest.TestCase):
     def test_invalid_merge_method_rejected(self, mock_api):
         with patch.dict(os.environ, {}, clear=True):
             r = gitea_merge_pr(
-                pr_number=8, confirmation="MERGE PR 8", do="octopus", remote="prgs")
+                pr_number=8, confirmation="MERGE PR 8", do="octopus", expected_head_sha="abc123", remote="prgs")
         self.assertFalse(r["performed"])
         self.assertTrue(any("unknown merge method" in x for x in r["reasons"]))
         mock_api.assert_not_called()
@@ -820,7 +939,9 @@ class TestMergePR(unittest.TestCase):
                "GITEA_TOKEN": "super-secret-token"}
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
-                pr_number=8, confirmation=self._confirm(8), remote="prgs")
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         blob = repr(r).lower()
         for secret in ("super-secret-token", "authorization", "basic ", FAKE_AUTH.lower()):
             self.assertNotIn(secret, blob)
@@ -837,7 +958,9 @@ class TestMergePR(unittest.TestCase):
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
-                pr_number=8, confirmation=self._confirm(8), remote="prgs")
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         self.assertFalse(r["performed"])
         blob = repr(r)
         self.assertIn("[REDACTED]", blob)
@@ -855,7 +978,9 @@ class TestMergePR(unittest.TestCase):
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
-                pr_number=8, confirmation=self._confirm(8), remote="prgs")
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         self.assertFalse(r["performed"])
         self.assertFalse(r.get("approval_visible"))
         self.assertTrue(any("no visible APPROVED review" in x for x in r["reasons"]))
@@ -876,7 +1001,9 @@ class TestMergePR(unittest.TestCase):
                "GITEA_ALLOWED_OPERATIONS": "read,merge"}
         with patch.dict(os.environ, env, clear=True):
             r = gitea_merge_pr(
-                pr_number=8, confirmation=self._confirm(8), remote="prgs")
+                pr_number=8, confirmation=self._confirm(8),
+                expected_head_sha="abc123", remote="prgs",
+            )
         self.assertFalse(r["performed"])
         self.assertTrue(r.get("has_blocking_change_requests"))
         self.assertTrue(any("REQUEST_CHANGES" in x for x in r["reasons"]))
@@ -986,7 +1113,7 @@ class TestReviewPR(unittest.TestCase):
         ]
         from mcp_server import init_review_decision_lock
         init_review_decision_lock("prgs", "review_pr")
-        gitea_mark_final_review_decision(1, "approve", remote="prgs")
+        gitea_mark_final_review_decision(1, "approve", remote="prgs", expected_head_sha="abc123")
         result = gitea_review_pr(
             pr_number=1,
             event="APPROVE",
@@ -1653,7 +1780,26 @@ class TestReviewDecisionValidationGate(unittest.TestCase):
         }
 
     def setUp(self):
+        import reviewer_pr_lease
+
         init_review_decision_lock("prgs", "review_pr")
+        self._lease_patch = _install_owned_reviewer_lease(
+            self.PR, head_sha=self.SHA,
+        )
+        self._lease_patch.start()
+        self._auth_identity_patch = patch(
+            "mcp_server._authenticated_username", return_value="reviewer-bot"
+        )
+        self._auth_identity_patch.start()
+        self.addCleanup(self._auth_identity_patch.stop)
+        self.addCleanup(self._lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
+        self._pr_lease_comments_patch = patch(
+            "mcp_server._list_pr_lease_comments", return_value=[]
+        )
+        self._pr_lease_comments_patch.start()
+        self.addCleanup(self._pr_lease_comments_patch.stop)
+
 
     def _env(self):
         return patch.dict(os.environ, {
@@ -1748,8 +1894,32 @@ class TestSubmitPrReview(unittest.TestCase):
     """Gated review-mutation tool (#15)."""
 
     def setUp(self):
+        import reviewer_pr_lease
+
         init_review_decision_lock("prgs", "review_pr")
-        gitea_mark_final_review_decision(8, "approve", remote="prgs")
+        self._lease_patch = _install_owned_reviewer_lease(8)
+        self._lease_patch.start()
+        self._auth_identity_patch = patch(
+            "mcp_server._authenticated_username", return_value="reviewer-bot"
+        )
+        self._auth_identity_patch.start()
+        self._pr_lease_comments_patch = patch(
+            "mcp_server._list_pr_lease_comments", return_value=[]
+        )
+        self._pr_lease_comments_patch.start()
+        self._pr_work_lease_patch = patch(
+            "mcp_server._pr_work_lease_reviewer_block",
+            return_value=dict(_NO_PR_WORK_LEASE_BLOCK),
+        )
+        self._pr_work_lease_patch.start()
+        gitea_mark_final_review_decision(
+            8, "approve", remote="prgs", expected_head_sha="abc123",
+        )
+        self.addCleanup(self._auth_identity_patch.stop)
+        self.addCleanup(self._lease_patch.stop)
+        self.addCleanup(self._pr_lease_comments_patch.stop)
+        self.addCleanup(self._pr_work_lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
 
     def _pr(self, author, state="open", sha="abc123", mergeable=True):
         return {
@@ -1909,10 +2079,11 @@ class TestSubmitPrReview(unittest.TestCase):
     @patch("mcp_server.api_request")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
     def test_comment_succeeds_when_review_eligible(self, _auth, mock_api):
-        gitea_mark_final_review_decision(8, "comment", remote="prgs")
         mock_api.side_effect = [
+            {"login": "reviewer-bot"}, self._pr("author-bot"),
             {"login": "reviewer-bot"}, self._pr("author-bot"), {"id": 3},
         ]
+        gitea_mark_final_review_decision(8, "comment", remote="prgs", expected_head_sha="abc123")
         env = {"GITEA_PROFILE_NAME": "gitea-reviewer",
                "GITEA_ALLOWED_OPERATIONS": "read,review"}
         with patch.dict(os.environ, env, clear=True):
@@ -1928,12 +2099,15 @@ class TestSubmitPrReview(unittest.TestCase):
         with patch("mcp_server.get_auth_header", return_value=FAKE_AUTH), \
                 patch("mcp_server.api_request") as mock_api:
             mock_api.side_effect = [
+                {"login": "jcwalker3"}, self._pr("jcwalker3"),
                 {"login": "jcwalker3"}, self._pr("jcwalker3"), {"id": 4},
             ]
             env = {"GITEA_PROFILE_NAME": "gitea-reviewer",
                    "GITEA_ALLOWED_OPERATIONS": "read,review"}
             with patch.dict(os.environ, env, clear=True):
-                gitea_mark_final_review_decision(8, "comment", remote="prgs")
+                gitea_mark_final_review_decision(
+                    8, "comment", remote="prgs", expected_head_sha="abc123",
+                )
                 r = gitea_submit_pr_review(
                     pr_number=8, action="comment", body="note", remote="prgs",
                     final_review_decision_ready=True,
@@ -1976,20 +2150,22 @@ class TestSubmitPrReview(unittest.TestCase):
         with patch("mcp_server.get_auth_header", return_value=FAKE_AUTH), \
                 patch("mcp_server.api_request") as mock_api:
             mock_api.side_effect = [
-                {"login": "reviewer-bot"}, self._pr("author-bot", sha="abc123"),
+                {"login": "reviewer-bot"}, self._pr("author-bot", sha="deadbeef"),
             ]
             env = {"GITEA_PROFILE_NAME": "gitea-reviewer",
                    "GITEA_ALLOWED_OPERATIONS": "read,review,approve"}
             with patch.dict(os.environ, env, clear=True):
                 r = gitea_submit_pr_review(
                     pr_number=8, action="approve",
-                    expected_head_sha="deadbeef", remote="prgs",
+                    expected_head_sha="abc123", remote="prgs",
                     final_review_decision_ready=True,
                 )
             self.assertFalse(r["performed"])
-            self.assertIn(
-                "expected head SHA does not match current PR head (fail closed)",
-                r["reasons"])
+            self.assertTrue(any(
+                "expected head SHA does not match current PR head (fail closed)" in reason
+                or "PR head changed during lease" in reason
+                for reason in r["reasons"]
+            ))
             self._assert_no_mutation(mock_api)
 
     def test_head_sha_match_allows(self):
@@ -2032,7 +2208,7 @@ class TestSubmitPrReview(unittest.TestCase):
                "GITEA_ALLOWED_OPERATIONS": "read,review,approve",
                "GITEA_TOKEN": "super-secret-token"}
         with patch.dict(os.environ, env, clear=True):
-            gitea_mark_final_review_decision(5, "approve", remote="prgs")
+            gitea_mark_final_review_decision(5, "approve", remote="prgs", expected_head_sha="abc123")
             r = gitea_submit_pr_review(
                 pr_number=5, action="approve", remote="prgs",
                 final_review_decision_ready=True,
@@ -2052,9 +2228,8 @@ class TestSubmitPrReview(unittest.TestCase):
         env = {"GITEA_PROFILE_NAME": "gitea-reviewer",
                "GITEA_ALLOWED_OPERATIONS": "read,review,approve"}
         with patch.dict(os.environ, env, clear=True):
-            gitea_mark_final_review_decision(5, "approve", remote="prgs")
             r = gitea_submit_pr_review(
-                pr_number=5, action="approve", remote="prgs",
+                pr_number=8, action="approve", remote="prgs",
                 final_review_decision_ready=True,
             )
         self.assertFalse(r["performed"])
@@ -2142,7 +2317,7 @@ class TestSubmitPrReview(unittest.TestCase):
 
     def test_mark_final_decision_rejects_remote_mismatch(self):
         init_review_decision_lock("prgs", "review_pr")
-        r = gitea_mark_final_review_decision(8, "approve", remote="dadeschools")
+        r = gitea_mark_final_review_decision(8, "approve", remote="dadeschools", expected_head_sha="abc123")
         self.assertFalse(r["marked_ready"])
         self.assertTrue(any("does not match locked remote" in x for x in r["reasons"]))
 
@@ -2154,28 +2329,30 @@ class TestSubmitPrReview(unittest.TestCase):
             {"id": 42, "state": "APPROVED"},
             [_formal_review("reviewer-bot", "APPROVED", review_id=42)],
             {"login": "reviewer-bot"}, self._pr("author-bot"),
+            {"login": "reviewer-bot"}, self._pr("author-bot"),
             {"id": 43, "state": "REQUEST_CHANGES"},
             [_formal_review("reviewer-bot", "REQUEST_CHANGES", review_id=43)],
         ]
         env = {"GITEA_PROFILE_NAME": "gitea-reviewer",
                "GITEA_ALLOWED_OPERATIONS": "read,review,approve,request_changes"}
-        gitea_mark_final_review_decision(8, "approve", remote="prgs")
-        with patch.dict(os.environ, env, clear=True):
-            first = gitea_submit_pr_review(
-                pr_number=8, action="approve", remote="prgs",
-                final_review_decision_ready=True,
-            )
-            auth = gitea_authorize_review_correction(
-                prior_review_id=42,
-                prior_review_state="approve",
-                reason="operator approved correcting mistaken approve",
-                operator_authorized=True,
-            )
-            _mark_request_changes_ready(remote="prgs")
-            second = gitea_submit_pr_review(
-                pr_number=8, action="request_changes", remote="prgs",
-                final_review_decision_ready=True,
-            )
+        with patch("mcp_server.gitea_get_pr_review_feedback",
+                   return_value=dict(_NO_BLOCKER_FEEDBACK)):
+            with patch.dict(os.environ, env, clear=True):
+                first = gitea_submit_pr_review(
+                    pr_number=8, action="approve", remote="prgs",
+                    final_review_decision_ready=True,
+                )
+                auth = gitea_authorize_review_correction(
+                    prior_review_id=42,
+                    prior_review_state="approve",
+                    reason="operator approved correcting mistaken approve",
+                    operator_authorized=True,
+                )
+                _mark_request_changes_ready(remote="prgs")
+                second = gitea_submit_pr_review(
+                    pr_number=8, action="request_changes", remote="prgs",
+                    final_review_decision_ready=True,
+                )
         self.assertTrue(first["performed"])
         self.assertTrue(auth["authorized"])
         self.assertTrue(second["performed"])
@@ -2187,7 +2364,7 @@ class TestSubmitPrReview(unittest.TestCase):
                "GITEA_ALLOWED_OPERATIONS": "read,review,approve"}
         with patch.dict(os.environ, env, clear=True):
             # Mark decision for specific remote, org, repo
-            gitea_mark_final_review_decision(8, "approve", remote="prgs", org="MyOrg", repo="MyRepo")
+            gitea_mark_final_review_decision(8, "approve", remote="prgs", expected_head_sha="abc123", org="MyOrg", repo="MyRepo")
 
             # Mismatched remote
             r = gitea_submit_pr_review(
@@ -2273,6 +2450,13 @@ class TestTrackerHygieneCleanup(unittest.TestCase):
         self.assertEqual(res["cleanup_status"].get(1), "not present")
 
     def test_merge_pr_with_closes_removes_label(self):
+        import reviewer_pr_lease
+
+        lease_patch = _install_owned_reviewer_lease(1, head_sha="sha123")
+        lease_patch.start()
+        self.addCleanup(lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
+
         def api_side_effect(method, url, auth, payload=None):
             if method == "GET" and "/user" in url:
                 return {"login": "merger"}
@@ -2307,6 +2491,13 @@ class TestTrackerHygieneCleanup(unittest.TestCase):
         self.assertEqual(res["cleanup_status"].get(123), "released")
 
     def test_merge_pr_with_branch_name_removes_label(self):
+        import reviewer_pr_lease
+
+        lease_patch = _install_owned_reviewer_lease(1, head_sha="sha123")
+        lease_patch.start()
+        self.addCleanup(lease_patch.stop)
+        self.addCleanup(reviewer_pr_lease.clear_session_lease)
+
         def api_side_effect(method, url, auth, payload=None):
             if method == "GET" and "/user" in url:
                 return {"login": "merger"}
@@ -2988,10 +3179,12 @@ class TestVerifyMutationAuthority(unittest.TestCase):
         # profile; the active profile resolves as reviewer — side-channel
         # override rejected even with a matching in-process authority.
         self._authority()
-        with patch.dict(os.environ,
-                        {"GITEA_SESSION_PROFILE_LOCK": "prgs-author"}):
-            with self.assertRaises(RuntimeError) as ctx:
-                mcp_server.verify_mutation_authority("prgs")
+        with patch("mcp_server.gitea_config.is_runtime_switching_enabled",
+                   return_value=False):
+            with patch.dict(os.environ,
+                            {"GITEA_SESSION_PROFILE_LOCK": "prgs-author"}):
+                with self.assertRaises(RuntimeError) as ctx:
+                    mcp_server.verify_mutation_authority("prgs")
         self.assertIn("side-channel override rejected", str(ctx.exception))
 
     def test_foreign_pid_authority_is_not_trusted(self):
@@ -3044,8 +3237,14 @@ class TestIssueLocking(unittest.TestCase):
     def setUp(self):
         self._env_patcher = patch.dict(os.environ, ISSUE_WRITE_ENV, clear=True)
         self._env_patcher.start()
+        self._dup_fetcher_patcher = patch(
+            "mcp_server.issue_duplicate_context_fetcher",
+            return_value=([], [], {"status": "not_claimed"}),
+        )
+        self.mock_dup_fetcher = self._dup_fetcher_patcher.start()
 
     def tearDown(self):
+        self._dup_fetcher_patcher.stop()
         self._env_patcher.stop()
         if os.path.exists(ISSUE_LOCK_FILE):
             os.remove(ISSUE_LOCK_FILE)
@@ -3054,10 +3253,8 @@ class TestIssueLocking(unittest.TestCase):
         "mcp_server.issue_lock_worktree.read_worktree_git_state",
         return_value=_clean_master_git_state_for_lock(),
     )
-    @patch("mcp_server.api_get_all")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
-    def test_lock_issue_success(self, _auth, mock_api, _git_state):
-        mock_api.return_value = [] # no open PRs
+    def test_lock_issue_success(self, _auth, _git_state):
         res = gitea_lock_issue(issue_number=196, branch_name="feat/issue-196-mutations", remote="prgs")
         self.assertTrue(res["success"])
         self.assertEqual(res["work_lease"]["operation_type"], "author_issue_work")
@@ -3082,50 +3279,48 @@ class TestIssueLocking(unittest.TestCase):
         "mcp_server.issue_lock_worktree.read_worktree_git_state",
         return_value=_clean_master_git_state_for_lock(),
     )
-    @patch("mcp_server.api_get_all")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
-    def test_lock_issue_reused_by_open_pr_branch(self, _auth, mock_api, _git_state):
-        mock_api.return_value = [{
+    def test_lock_issue_reused_by_open_pr_branch(self, _auth, _git_state):
+        self.mock_dup_fetcher.return_value = ([{
             "number": 200,
             "head": {"ref": "feat/issue-196-boundary"},
             "title": "Some PR",
-            "body": "No closes ref"
-        }]
+            "body": "No closes ref",
+        }], [], {"status": "not_claimed"})
         with self.assertRaises(ValueError) as ctx:
             gitea_lock_issue(issue_number=196, branch_name="feat/issue-196-mutations", remote="prgs")
-        self.assertIn("already tied to an open PR", str(ctx.exception))
+        self.assertIn("open PR #200 already covers issue", str(ctx.exception))
 
     @patch(
         "mcp_server.issue_lock_worktree.read_worktree_git_state",
         return_value=_clean_master_git_state_for_lock(),
     )
-    @patch("mcp_server.api_get_all")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
-    def test_lock_issue_reused_by_open_pr_closes_ref(self, _auth, mock_api, _git_state):
-        mock_api.return_value = [{
+    def test_lock_issue_reused_by_open_pr_closes_ref(self, _auth, _git_state):
+        self.mock_dup_fetcher.return_value = ([{
             "number": 200,
             "head": {"ref": "feat/other-branch"},
             "title": "Some PR",
-            "body": "fixes #196"
-        }]
+            "body": "fixes #196",
+        }], [], {"status": "not_claimed"})
         with self.assertRaises(ValueError) as ctx:
             gitea_lock_issue(issue_number=196, branch_name="feat/issue-196-mutations", remote="prgs")
-        self.assertIn("already tied to an open PR", str(ctx.exception))
+        self.assertIn("open PR #200 already covers issue", str(ctx.exception))
 
     @patch(
         "mcp_server.issue_lock_worktree.read_worktree_git_state",
         return_value=_clean_master_git_state_for_lock(),
     )
-    @patch("mcp_server.api_get_all")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
-    def test_lock_issue_reused_by_remote_branch(self, _auth, mock_api, _git_state):
-        mock_api.side_effect = [
+    def test_lock_issue_reused_by_remote_branch(self, _auth, _git_state):
+        self.mock_dup_fetcher.return_value = (
             [],
-            [{"name": "feat/issue-196-existing-work"}],
-        ]
+            ["feat/issue-196-existing-work"],
+            {"status": "not_claimed"},
+        )
         with self.assertRaises(ValueError) as ctx:
             gitea_lock_issue(issue_number=196, branch_name="feat/issue-196-mutations", remote="prgs")
-        self.assertIn("already has matching branch", str(ctx.exception))
+        self.assertIn("remote branch(es) already match issue pattern", str(ctx.exception))
 
     def test_lock_issue_blocks_active_same_operation_lease(self):
         with open(ISSUE_LOCK_FILE, "w", encoding="utf-8") as f:
@@ -3284,6 +3479,28 @@ class TestIssueLocking(unittest.TestCase):
                 )
         self.assertIn("does not match locked worktree", str(ctx.exception))
 
+    @patch("mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
+           return_value=(True, []))
+    @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
+    def test_create_pr_manual_lock_seed_blocked(self, _auth, _role):
+        with open(ISSUE_LOCK_FILE, "w", encoding="utf-8") as f:
+            json.dump(
+                _sample_issue_lock(
+                    issue_number=447,
+                    branch_name="feat/issue-447-lock-provenance",
+                    lock_provenance=None,
+                ),
+                f,
+            )
+        with patch.dict(os.environ, CREATE_PR_ENV, clear=True):
+            with self.assertRaises(RuntimeError) as ctx:
+                gitea_create_pr(
+                    title="feat: lock provenance Closes #447",
+                    head="feat/issue-447-lock-provenance",
+                    remote="prgs",
+                )
+        self.assertIn("lock provenance", str(ctx.exception).lower())
+
     @patch("mcp_server.api_request")
     @patch("mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
            return_value=(True, []))

tests/test_pr_queue_inventory.py

@@ -156,9 +156,22 @@ class TestPRQueueInventory(unittest.TestCase):
         ]
 
         from mcp_server import init_review_decision_lock, gitea_mark_final_review_decision
-        init_review_decision_lock("prgs", "review_pr")
-        gitea_mark_final_review_decision(1, "approve", remote="prgs")
-        result = gitea_review_pr(pr_number=1, event="APPROVE", remote="prgs", final_review_decision_ready=True)
+        from tests.test_mcp_server import _install_owned_reviewer_lease
+        import reviewer_pr_lease
+
+        with patch("mcp_server._authenticated_username", return_value="reviewer1"):
+            init_review_decision_lock("prgs", "review_pr")
+            gitea_mark_final_review_decision(1, "approve", remote="prgs")
+            lease_patch = _install_owned_reviewer_lease(
+                1, head_sha="abc1", session_id="inventory-review-lease",
+            )
+            lease_patch.start()
+            self.addCleanup(lease_patch.stop)
+            self.addCleanup(reviewer_pr_lease.clear_session_lease)
+            result = gitea_review_pr(
+                pr_number=1, event="APPROVE", remote="prgs",
+                final_review_decision_ready=True,
+            )
         self.assertTrue(result["success"])
         self.assertIn("=== PR Queue Inventory ===", result["message"])
         self.assertIn("Repository:", result["message"])

tests/test_review_proofs.py

@@ -2346,6 +2346,7 @@ class TestWorkIssueFinalReport(unittest.TestCase):
             "- Safe next action: open PR",
             "- Next: open PR",
             "- Safety statement: no review/merge",
+            "- Duplicate work outcome: duplicate work not prevented",
         ])
 
     def test_complete_work_issue_report_earns_a(self):

tests/test_reviewer_pr_lease.py

@@ -0,0 +1,193 @@
+"""Tests for per-PR reviewer leases (#407)."""
+
+import sys
+import unittest
+from datetime import datetime, timedelta, timezone
+from unittest.mock import patch
+
+sys.path.insert(0, str(__import__("pathlib").Path(__file__).resolve().parent.parent))
+
+import reviewer_pr_lease as leases
+
+
+def _lease_comment(
+    pr_number: int,
+    session_id: str,
+    *,
+    phase: str = "claimed",
+    minutes_ago: int = 0,
+    candidate_head: str = "a" * 40,
+) -> dict:
+    now = datetime.now(timezone.utc) - timedelta(minutes=minutes_ago)
+    body = leases.format_lease_body(
+        repo="Scaled-Tech-Consulting/Gitea-Tools",
+        pr_number=pr_number,
+        issue_number=295,
+        reviewer_identity="rev1",
+        profile="prgs-reviewer",
+        session_id=session_id,
+        worktree="branches/review-pr382",
+        phase=phase,
+        candidate_head=candidate_head,
+        target_branch="master",
+        target_branch_sha="b" * 40,
+        last_activity=now,
+    )
+    return {"id": 1, "body": body, "user": {"login": "rev1"}}
+
+
+class TestReviewerLeaseAcquire(unittest.TestCase):
+    def setUp(self):
+        leases.clear_session_lease()
+
+    def test_two_reviewers_cannot_lease_same_pr(self):
+        comments = [_lease_comment(382, "session-a")]
+        result = leases.assess_acquire_lease(
+            comments,
+            pr_number=382,
+            reviewer_identity="rev2",
+            profile="prgs-reviewer",
+            session_id="session-b",
+            repo="Scaled-Tech-Consulting/Gitea-Tools",
+            issue_number=295,
+            worktree="branches/review-pr382-b",
+            candidate_head="c" * 40,
+            target_branch="master",
+            target_branch_sha="d" * 40,
+        )
+        self.assertFalse(result["acquire_allowed"])
+        self.assertTrue(any("already has active" in r for r in result["reasons"]))
+
+    def test_two_reviewers_can_lease_different_prs(self):
+        comments = [_lease_comment(382, "session-a")]
+        result = leases.assess_acquire_lease(
+            comments,
+            pr_number=383,
+            reviewer_identity="rev2",
+            profile="prgs-reviewer",
+            session_id="session-b",
+            repo="Scaled-Tech-Consulting/Gitea-Tools",
+            issue_number=296,
+            worktree="branches/review-pr383",
+            candidate_head="c" * 40,
+            target_branch="master",
+            target_branch_sha="d" * 40,
+        )
+        self.assertTrue(result["acquire_allowed"])
+        self.assertIsNotNone(result["lease_body"])
+
+
+class TestReviewerLeaseFreshness(unittest.TestCase):
+    def test_stale_warning_after_30_minutes(self):
+        lease = leases.parse_lease_comment(
+            _lease_comment(382, "session-a", minutes_ago=35)["body"]
+        )
+        self.assertEqual(
+            leases.classify_lease_freshness(lease),
+            "stale_warning",
+        )
+
+    def test_reclaimable_after_60_minutes(self):
+        lease = leases.parse_lease_comment(
+            _lease_comment(382, "session-a", minutes_ago=65)["body"]
+        )
+        self.assertEqual(
+            leases.classify_lease_freshness(lease),
+            "reclaimable",
+        )
+
+
+class TestReviewerLeaseMutationGate(unittest.TestCase):
+    def setUp(self):
+        leases.clear_session_lease()
+
+    def test_reviewer_without_lease_cannot_mutate(self):
+        head = "f" * 40
+        comments = [_lease_comment(382, "other-session", candidate_head=head)]
+        result = leases.assess_mutation_lease_gate(
+            pr_number=382,
+            comments=comments,
+            reviewer_identity="rev1",
+            session_id="my-session",
+            mutation="approve",
+            live_head_sha=head,
+            pinned_head_sha=head,
+        )
+        self.assertTrue(result["block"])
+
+    def test_owned_lease_allows_mutation(self):
+        head = "f" * 40
+        comments = [_lease_comment(382, "my-session", candidate_head=head)]
+        leases.record_session_lease({
+            "pr_number": 382,
+            "session_id": "my-session",
+            "candidate_head": head,
+            "target_branch": "master",
+        })
+        result = leases.assess_mutation_lease_gate(
+            pr_number=382,
+            comments=comments,
+            reviewer_identity="rev1",
+            session_id="my-session",
+            mutation="approve",
+            live_head_sha=head,
+            pinned_head_sha=head,
+        )
+        self.assertFalse(result["block"])
+
+    def test_head_change_invalidates_lease(self):
+        reviewed = "f" * 40
+        live = "e" * 40
+        comments = [_lease_comment(382, "my-session", candidate_head=reviewed)]
+        leases.record_session_lease({
+            "pr_number": 382,
+            "session_id": "my-session",
+            "candidate_head": reviewed,
+        })
+        result = leases.assess_mutation_lease_gate(
+            pr_number=382,
+            comments=comments,
+            reviewer_identity="rev1",
+            session_id="my-session",
+            mutation="merge",
+            live_head_sha=live,
+            pinned_head_sha=reviewed,
+        )
+        self.assertTrue(result["block"])
+        self.assertTrue(any("head" in r.lower() for r in result["reasons"]))
+
+
+class TestReviewerLeaseMcpGate(unittest.TestCase):
+    def setUp(self):
+        leases.clear_session_lease()
+        patch("mcp_server.verify_preflight_purity").start()
+        patch("gitea_audit.audit_enabled", return_value=False).start()
+        mcp_server = __import__("mcp_server")
+        mcp_server._IDENTITY_CACHE.clear()
+        mcp_server.init_review_decision_lock("prgs", "review_pr")
+        mcp_server.record_preflight_check("whoami")
+        mcp_server.record_preflight_check("capability", "reviewer")
+
+    def tearDown(self):
+        patch.stopall()
+        leases.clear_session_lease()
+
+    def test_reviewer_pr_lease_gate_helper_blocks_without_session(self):
+        import mcp_server
+        head = "a" * 40
+        with patch("mcp_server._fetch_pr_comments", return_value=[]):
+            reasons = mcp_server._reviewer_pr_lease_gate(
+                pr_number=382,
+                remote="prgs",
+                host=None,
+                org=None,
+                repo=None,
+                mutation="approve",
+                live_head_sha=head,
+                pinned_head_sha=head,
+            )
+        self.assertTrue(any("lease" in r.lower() for r in reasons))
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_webui_project_registry.py

@@ -0,0 +1,111 @@
+"""Tests for web UI project registry (#427)."""
+import json
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from starlette.testclient import TestClient
+
+from webui.app import create_app
+from webui.project_registry import (
+    default_registry_path,
+    load_registry,
+    project_to_dict,
+)
+
+
+class TestProjectRegistryLoader(unittest.TestCase):
+    def test_default_registry_loads_gitea_tools(self):
+        registry = load_registry()
+        self.assertEqual(registry.version, 1)
+        self.assertEqual(len(registry.projects), 1)
+        project = registry.projects[0]
+        self.assertEqual(project.id, "gitea-tools")
+        self.assertEqual(project.repo_name, "Gitea-Tools")
+        self.assertEqual(project.gitea_owner, "Scaled-Tech-Consulting")
+        self.assertEqual(project.remote_host, "https://gitea.prgs.cc")
+        self.assertEqual(project.profiles["author"], "prgs-author")
+        self.assertEqual(project.profiles["reviewer"], "prgs-reviewer")
+        self.assertEqual(project.profiles["reconciler"], "prgs-reconciler")
+        self.assertIn("skill", project.workflow_paths)
+        self.assertGreaterEqual(len(project.onboarding_checklist), 4)
+
+    def test_registry_rejects_credential_keys(self):
+        payload = {
+            "version": 1,
+            "projects": [
+                {
+                    "id": "bad",
+                    "repo_name": "Bad",
+                    "gitea_owner": "Org",
+                    "remote_host": "https://gitea.example.invalid",
+                    "default_branch": "main",
+                    "local_checkout_path": ".",
+                    "profiles": {
+                        "author": "a",
+                        "reviewer": "r",
+                        "reconciler": "c",
+                    },
+                    "workflow_paths": {"skill": "skills/x.md"},
+                    "api_token": "secret",
+                }
+            ],
+        }
+        with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as handle:
+            json.dump(payload, handle)
+            path = Path(handle.name)
+        try:
+            with self.assertRaises(ValueError):
+                load_registry(path)
+        finally:
+            path.unlink(missing_ok=True)
+
+    def test_default_registry_path_points_at_packaged_data(self):
+        path = default_registry_path()
+        self.assertTrue(path.name == "projects.registry.json")
+        self.assertTrue(path.parent.name == "data")
+
+
+class TestProjectRegistryRoutes(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+
+    def test_projects_page_lists_gitea_tools(self):
+        response = self.client.get("/projects")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Gitea-Tools", response.text)
+        self.assertIn("Scaled-Tech-Consulting", response.text)
+        self.assertIn("prgs-author", response.text)
+        self.assertNotIn("child issue", response.text.lower())
+
+    def test_project_detail_renders_checklist(self):
+        response = self.client.get("/projects/gitea-tools")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Onboarding checklist", response.text)
+        self.assertIn("Configure execution profiles", response.text)
+        self.assertIn("branches/", response.text)
+
+    def test_project_detail_404(self):
+        response = self.client.get("/projects/unknown-repo")
+        self.assertEqual(response.status_code, 404)
+
+    def test_api_projects_json(self):
+        response = self.client.get("/api/projects")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["version"], 1)
+        self.assertEqual(len(data["projects"]), 1)
+        self.assertEqual(data["projects"][0]["id"], "gitea-tools")
+        self.assertIn("onboarding_checklist", data["projects"][0])
+
+    def test_project_to_dict_is_json_safe(self):
+        registry = load_registry()
+        encoded = json.dumps(project_to_dict(registry.projects[0]))
+        self.assertIn("gitea-tools", encoded)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_webui_prompt_library.py

@@ -0,0 +1,90 @@
+"""Tests for web UI prompt library (#428)."""
+import json
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from starlette.testclient import TestClient
+
+from webui.app import create_app
+from webui.prompt_library import find_prompt, library_to_dict, load_prompt_library, prompt_to_dict
+
+REQUIRED_PROMPT_SLUGS = frozenset({
+    "review-pr",
+    "work-issue",
+    "create-issue",
+    "comment-issue",
+    "cleanup",
+    "audit",
+    "onboarding",
+})
+
+
+class TestPromptLibraryLoader(unittest.TestCase):
+    def test_library_loads_required_prompts(self):
+        entries = load_prompt_library()
+        slugs = {entry.slug for entry in entries}
+        self.assertEqual(slugs, REQUIRED_PROMPT_SLUGS)
+
+    def test_workflow_hashes_present(self):
+        review = find_prompt("review-pr")
+        self.assertIsNotNone(review)
+        assert review is not None
+        self.assertTrue(review.workflow_hash)
+        self.assertEqual(len(review.workflow_hash), 64)
+
+    def test_prompt_text_is_short(self):
+        for entry in load_prompt_library():
+            self.assertLess(len(entry.prompt_text), 400)
+            self.assertNotIn("Do not improvise around the gates", entry.prompt_text)
+
+
+class TestPromptLibraryRoutes(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+
+    def test_prompts_page_lists_all_entries(self):
+        response = self.client.get("/prompts")
+        self.assertEqual(response.status_code, 200)
+        for label in (
+            "Review PR",
+            "Work issue",
+            "Create issue",
+            "Comment on issue",
+            "Post-merge cleanup",
+            "Reconciliation audit",
+            "Project onboarding",
+        ):
+            self.assertIn(label, response.text)
+        self.assertIn("Copy prompt", response.text)
+        self.assertIn("sha256:", response.text)
+        self.assertNotIn("child issue", response.text.lower())
+
+    def test_prompt_detail_route(self):
+        response = self.client.get("/prompts/work-issue")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("work-issue.md", response.text)
+        self.assertIn("Copy prompt", response.text)
+
+    def test_prompt_detail_404(self):
+        self.assertEqual(self.client.get("/prompts/missing").status_code, 404)
+
+    def test_api_prompts_json(self):
+        response = self.client.get("/api/prompts")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["count"], 7)
+        review = next(item for item in data["prompts"] if item["slug"] == "review-pr")
+        self.assertIn("workflow_hash", review)
+        self.assertIn("review-merge-pr.md", review["workflow_path"])
+
+    def test_prompt_to_dict_roundtrip(self):
+        entry = load_prompt_library()[0]
+        encoded = json.dumps(prompt_to_dict(entry))
+        self.assertIn("workflow_path", encoded)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_webui_queue_dashboard.py

@@ -0,0 +1,288 @@
+"""Tests for web UI live queue dashboard (#429)."""
+import sys
+import unittest
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from starlette.testclient import TestClient
+
+from webui.app import create_app
+from webui.queue_loader import (
+    PaginationMeta,
+    QueueSnapshot,
+    _classify_issue,
+    _classify_pr,
+    _extract_linked_issue,
+    load_queue_snapshot,
+    snapshot_to_dict,
+)
+from webui.queue_views import render_queue_page
+
+_RECENT = datetime.now(timezone.utc).isoformat()
+_STALE = (datetime.now(timezone.utc) - timedelta(days=30)).isoformat()
+
+_SAMPLE_PRS = [
+    {
+        "number": 100,
+        "title": "feat: queue dashboard (Closes #429)",
+        "body": "",
+        "mergeable": True,
+        "updated_at": _RECENT,
+        "head": {"ref": "feat/issue-429", "sha": "abc123def456"},
+        "base": {"ref": "master"},
+    },
+    {
+        "number": 99,
+        "title": "fix: conflict",
+        "body": "Closes #50",
+        "mergeable": False,
+        "updated_at": _STALE,
+        "head": {"ref": "fix/issue-50", "sha": "deadbeef0001"},
+        "base": {"ref": "master"},
+    },
+    {
+        "number": 98,
+        "title": "feat: duplicate A (Closes #60)",
+        "body": "",
+        "mergeable": True,
+        "updated_at": _RECENT,
+        "head": {"ref": "feat/issue-60-a", "sha": "111111111111"},
+        "base": {"ref": "master"},
+    },
+    {
+        "number": 97,
+        "title": "feat: duplicate B (Closes #60)",
+        "body": "",
+        "mergeable": True,
+        "updated_at": _RECENT,
+        "head": {"ref": "feat/issue-60-b", "sha": "222222222222"},
+        "base": {"ref": "master"},
+    },
+]
+
+_SAMPLE_ISSUES = [
+    {
+        "number": 429,
+        "title": "Web UI queue dashboard",
+        "state": "open",
+        "labels": [{"name": "status:in-progress"}],
+        "assignee": None,
+        "updated_at": _RECENT,
+    },
+    {
+        "number": 60,
+        "title": "Duplicate PR target",
+        "state": "open",
+        "labels": [],
+        "assignee": None,
+        "updated_at": _RECENT,
+    },
+    {
+        "number": 50,
+        "title": "Blocked PR target",
+        "state": "open",
+        "labels": [],
+        "assignee": None,
+        "updated_at": _STALE,
+    },
+]
+
+
+def _mock_pagination(count: int) -> PaginationMeta:
+    return PaginationMeta(
+        page=1,
+        per_page=50,
+        returned_count=count,
+        has_more=False,
+        is_final_page=True,
+        inventory_complete=True,
+        pages_fetched=1,
+    )
+
+
+def _mock_fetch_prs(*_args, **_kwargs):
+    return list(_SAMPLE_PRS), _mock_pagination(len(_SAMPLE_PRS))
+
+
+def _mock_fetch_issues(*_args, **_kwargs):
+    return list(_SAMPLE_ISSUES), _mock_pagination(len(_SAMPLE_ISSUES))
+
+
+class TestQueueClassification(unittest.TestCase):
+    def test_extract_linked_issue_from_title(self):
+        self.assertEqual(
+            _extract_linked_issue("feat: X (Closes #429)", ""),
+            429,
+        )
+
+    def test_classify_pr_blocked_and_stale(self):
+        pr = _SAMPLE_PRS[1]
+        badges = _classify_pr(
+            pr,
+            issue_claimed=set(),
+            issue_to_prs={50: [99]},
+        )
+        self.assertIn("blocked", badges)
+        self.assertIn("stale", badges)
+
+    def test_classify_pr_duplicate(self):
+        badges = _classify_pr(
+            _SAMPLE_PRS[2],
+            issue_claimed=set(),
+            issue_to_prs={60: [98, 97]},
+        )
+        self.assertIn("duplicate", badges)
+        self.assertIn("in-review", badges)
+
+    def test_classify_issue_claimed_and_duplicate(self):
+        claimed = _classify_issue(_SAMPLE_ISSUES[0], linked_prs=[])
+        self.assertIn("claimed", claimed)
+        duplicate = _classify_issue(_SAMPLE_ISSUES[1], linked_prs=[98, 97])
+        self.assertIn("duplicate", duplicate)
+
+
+class TestQueueLoader(unittest.TestCase):
+    def test_snapshot_with_mock_fetch(self):
+        snapshot = load_queue_snapshot(
+            fetch_prs=_mock_fetch_prs,
+            fetch_issues=_mock_fetch_issues,
+        )
+        self.assertEqual(snapshot.project_id, "gitea-tools")
+        self.assertIsNone(snapshot.fetch_error)
+        self.assertEqual(len(snapshot.prs), 4)
+        self.assertEqual(len(snapshot.issues), 3)
+        self.assertTrue(snapshot.pr_pagination.inventory_complete)
+        self.assertTrue(snapshot.issue_pagination.inventory_complete)
+
+        pr100 = next(p for p in snapshot.prs if p.number == 100)
+        self.assertEqual(pr100.extra["linked_issue"], "429")
+        self.assertIn("claimed", pr100.badges)
+
+    def test_snapshot_dict_export(self):
+        snapshot = load_queue_snapshot(
+            fetch_prs=_mock_fetch_prs,
+            fetch_issues=_mock_fetch_issues,
+        )
+        data = snapshot_to_dict(snapshot)
+        self.assertEqual(data["project_id"], "gitea-tools")
+        self.assertIsNone(data["fetch_error"])
+        self.assertEqual(len(data["prs"]), 4)
+        self.assertTrue(data["pagination"]["prs"]["inventory_complete"])
+
+
+class TestQueueRoutes(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+        self._patch = mock.patch(
+            "webui.app.load_queue_snapshot",
+            return_value=load_queue_snapshot(
+                fetch_prs=_mock_fetch_prs,
+                fetch_issues=_mock_fetch_issues,
+            ),
+        )
+        self._patch.start()
+
+    def tearDown(self):
+        self._patch.stop()
+
+    def test_queue_page_renders_tables_and_pagination(self):
+        response = self.client.get("/queue")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Live queue", response.text)
+        self.assertIn("Open pull requests", response.text)
+        self.assertIn("Open issues", response.text)
+        self.assertIn("pages_fetched", response.text)
+        self.assertIn("Gitea-Tools", response.text)
+        self.assertNotIn("child issue", response.text.lower())
+
+    def test_api_queue_json(self):
+        response = self.client.get("/api/queue")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["repo"], "Scaled-Tech-Consulting/Gitea-Tools")
+        self.assertEqual(data["pagination"]["issues"]["returned_count"], 3)
+
+    def test_queue_fail_closed_without_credentials(self):
+        with mock.patch("webui.queue_loader.get_auth_header", return_value=None):
+            snapshot = load_queue_snapshot()
+        self.assertIsNotNone(snapshot.fetch_error)
+        self.assertEqual(len(snapshot.prs), 0)
+
+
+def _empty_pagination() -> PaginationMeta:
+    return PaginationMeta(
+        page=1,
+        per_page=50,
+        returned_count=0,
+        has_more=False,
+        is_final_page=True,
+        inventory_complete=True,
+        pages_fetched=1,
+    )
+
+
+def _empty_fetch(*_args, **_kwargs):
+    return [], _empty_pagination()
+
+
+class TestQueueFailClosedUx(unittest.TestCase):
+    """Regression tests for #458 fail-closed empty-state copy."""
+
+    def test_fail_closed_view_suppresses_empty_queue_copy(self):
+        snapshot = QueueSnapshot(
+            project_id="gitea-tools",
+            repo_label="Scaled-Tech-Consulting/Gitea-Tools",
+            prs=(),
+            issues=(),
+            pr_pagination=None,
+            issue_pagination=None,
+            fetch_error="Gitea credentials unavailable for gitea.prgs.cc",
+        )
+        html = render_queue_page(snapshot)
+        self.assertIn("Queue unavailable", html)
+        self.assertIn("Not loaded", html)
+        self.assertNotIn("No open items.", html)
+        self.assertIn("pagination:</strong> unavailable", html)
+
+    def test_fail_closed_route_does_not_show_empty_queue_copy(self):
+        client = TestClient(create_app())
+        snapshot = load_queue_snapshot(
+            fetch_prs=_empty_fetch,
+            fetch_issues=_empty_fetch,
+        )
+        snapshot = QueueSnapshot(
+            project_id=snapshot.project_id,
+            repo_label=snapshot.repo_label,
+            prs=(),
+            issues=(),
+            pr_pagination=None,
+            issue_pagination=None,
+            fetch_error="Gitea credentials unavailable for gitea.prgs.cc",
+        )
+        with mock.patch("webui.app.load_queue_snapshot", return_value=snapshot):
+            response = client.get("/queue")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Queue unavailable", response.text)
+        self.assertNotIn("No open items.", response.text)
+
+    def test_successful_empty_inventory_shows_empty_copy(self):
+        snapshot = load_queue_snapshot(
+            fetch_prs=_empty_fetch,
+            fetch_issues=_empty_fetch,
+        )
+        self.assertIsNone(snapshot.fetch_error)
+        self.assertEqual(len(snapshot.prs), 0)
+        self.assertEqual(len(snapshot.issues), 0)
+        self.assertTrue(snapshot.pr_pagination.inventory_complete)
+
+        html = render_queue_page(snapshot)
+        self.assertNotIn("Queue unavailable", html)
+        self.assertEqual(html.count("No open items."), 2)
+        self.assertIn("pagination (complete)", html)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_webui_skeleton.py

@@ -0,0 +1,73 @@
+"""Tests for internal web UI skeleton (#426)."""
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from starlette.testclient import TestClient
+
+from webui.app import create_app
+
+
+class TestWebuiSkeleton(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+
+    def test_health_returns_json(self):
+        response = self.client.get("/health")
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["status"], "ok")
+        self.assertEqual(data["service"], "mcp-control-plane-webui")
+        self.assertEqual(data["mode"], "read-only-mvp")
+        self.assertIn("timestamp", data)
+
+    def test_home_renders(self):
+        response = self.client.get("/")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Operator console", response.text)
+        self.assertIn("Read-only MVP", response.text)
+
+    def test_route_stubs_render(self):
+        for path in ("/runtime", "/audit"):
+            with self.subTest(path=path):
+                response = self.client.get(path)
+                self.assertEqual(response.status_code, 200)
+                self.assertIn("child issue", response.text.lower())
+
+    def test_prompts_is_implemented(self):
+        response = self.client.get("/prompts")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Prompt library", response.text)
+
+    def test_projects_is_implemented(self):
+        response = self.client.get("/projects")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Gitea-Tools", response.text)
+
+    def test_extra_stub_routes(self):
+        for path in ("/worktrees", "/leases"):
+            with self.subTest(path=path):
+                self.assertEqual(self.client.get(path).status_code, 200)
+
+    def test_post_is_rejected(self):
+        response = self.client.post("/health")
+        self.assertEqual(response.status_code, 405)
+        self.assertEqual(response.json()["error"], "read-only-mvp")
+
+    def test_queue_route_renders(self):
+        response = self.client.get("/queue")
+        self.assertEqual(response.status_code, 200)
+        self.assertIn("Live queue", response.text)
+
+    def test_nav_links_on_all_pages(self):
+        for path in ("/", "/queue", "/projects", "/prompts", "/runtime", "/audit"):
+            with self.subTest(path=path):
+                text = self.client.get(path).text
+                for href in ("/queue", "/projects", "/prompts", "/runtime", "/audit"):
+                    self.assertIn(f'href="{href}"', text)
+
+
+if __name__ == "__main__":
+    unittest.main()

webui/__init__.py

@@ -0,0 +1,5 @@
+"""Internal MCP Control Plane web UI (read-only MVP skeleton, #426)."""
+
+from webui.app import create_app
+
+__all__ = ["create_app"]

webui/__main__.py

@@ -0,0 +1,19 @@
+"""Run the internal web UI: ``python -m webui``."""
+
+from __future__ import annotations
+
+import os
+
+import uvicorn
+
+from webui.app import create_app
+
+
+def main() -> None:
+    host = os.environ.get("WEBUI_HOST", "127.0.0.1")
+    port = int(os.environ.get("WEBUI_PORT", "8765"))
+    uvicorn.run(create_app(), host=host, port=port, log_level="info")
+
+
+if __name__ == "__main__":
+    main()

webui/app.py

@@ -0,0 +1,180 @@
+"""Starlette application for the internal read-only web UI (#426)."""
+
+from __future__ import annotations
+
+from datetime import datetime, timezone
+
+from starlette.applications import Starlette
+from starlette.requests import Request
+from starlette.responses import HTMLResponse, JSONResponse, Response
+from starlette.routing import Route
+
+from webui.layout import render_page
+from webui.project_registry import find_project, load_registry, registry_to_dict
+from webui.project_views import render_project_detail, render_projects_list
+from webui.prompt_library import find_prompt, library_to_dict
+from webui.prompt_views import render_prompt_detail, render_prompts_page
+from webui.queue_loader import load_queue_snapshot, snapshot_to_dict
+from webui.queue_views import render_queue_page
+
+_READ_ONLY_METHODS = frozenset({"GET", "HEAD", "OPTIONS"})
+
+
+def _stub_page(title: str, description: str) -> HTMLResponse:
+    body = (
+        f"<h2>{title}</h2>"
+        f'<div class="stub"><p>{description}</p>'
+        "<p>Implementation tracked in a child issue of #425.</p></div>"
+    )
+    return HTMLResponse(render_page(title=title, body_html=body))
+
+
+async def home(_request: Request) -> HTMLResponse:
+    body = (
+        "<h2>Operator console</h2>"
+        "<p>Local entry point for MCP Control Plane operational views.</p>"
+        "<ul>"
+        "<li><strong>Queue</strong> — live PR and issue dashboard (#429)</li>"
+        "<li><strong>Projects</strong> — registry and onboarding (#427)</li>"
+        "<li><strong>Prompts</strong> — canonical workflow prompt library (#428)</li>"
+        "<li><strong>Runtime</strong> — MCP health and stale-runtime detection (#430)</li>"
+        "<li><strong>Audit</strong> — final-report paste and validator preview (#431)</li>"
+        "<li><strong>Worktrees</strong> — branch hygiene dashboard (#432)</li>"
+        "<li><strong>Leases</strong> — collision and lease visibility (#433)</li>"
+        "</ul>"
+    )
+    return HTMLResponse(render_page(title="Home", body_html=body))
+
+
+async def health(_request: Request) -> JSONResponse:
+    return JSONResponse({
+        "status": "ok",
+        "service": "mcp-control-plane-webui",
+        "mode": "read-only-mvp",
+        "timestamp": datetime.now(timezone.utc).isoformat(),
+    })
+
+
+async def queue(_request: Request) -> HTMLResponse:
+    snapshot = load_queue_snapshot()
+    return HTMLResponse(render_page(title="Queue", body_html=render_queue_page(snapshot)))
+
+
+async def api_queue(_request: Request) -> JSONResponse:
+    return JSONResponse(snapshot_to_dict(load_queue_snapshot()))
+
+
+async def projects(_request: Request) -> HTMLResponse:
+    registry = load_registry()
+    return HTMLResponse(render_projects_list(registry))
+
+
+async def project_detail(request: Request) -> HTMLResponse:
+    project_id = request.path_params["project_id"]
+    registry = load_registry()
+    project = find_project(registry, project_id)
+    if project is None:
+        return HTMLResponse(
+            render_page(
+                title="Project not found",
+                body_html=(
+                    "<h2>Project not found</h2>"
+                    f"<p>No registry entry for <code>{project_id}</code>.</p>"
+                    '<p><a href="/projects">← All projects</a></p>'
+                ),
+            ),
+            status_code=404,
+        )
+    return HTMLResponse(render_project_detail(project))
+
+
+async def api_projects(_request: Request) -> JSONResponse:
+    registry = load_registry()
+    return JSONResponse(registry_to_dict(registry))
+
+
+async def prompts(_request: Request) -> HTMLResponse:
+    return HTMLResponse(render_prompts_page())
+
+
+async def prompt_detail(request: Request) -> HTMLResponse:
+    prompt_id = request.path_params["prompt_id"]
+    prompt = find_prompt(prompt_id)
+    if prompt is None:
+        return HTMLResponse(
+            render_page(
+                title="Prompt not found",
+                body_html=(
+                    "<h2>Prompt not found</h2>"
+                    f"<p>No library entry for <code>{prompt_id}</code>.</p>"
+                    '<p><a href="/prompts">← All prompts</a></p>'
+                ),
+            ),
+            status_code=404,
+        )
+    return HTMLResponse(render_prompt_detail(prompt))
+
+
+async def api_prompts(_request: Request) -> JSONResponse:
+    return JSONResponse(library_to_dict())
+
+
+async def runtime(_request: Request) -> HTMLResponse:
+    return _stub_page(
+        "Runtime",
+        "Runtime health will report MCP profile, preflight, and stale-server signals.",
+    )
+
+
+async def audit(_request: Request) -> HTMLResponse:
+    return _stub_page(
+        "Audit",
+        "Report audit will accept pasted final reports and run validator previews.",
+    )
+
+
+async def worktrees(_request: Request) -> HTMLResponse:
+    return _stub_page(
+        "Worktrees",
+        "Worktree hygiene will summarize branches/ session folders and cleanup risk.",
+    )
+
+
+async def leases(_request: Request) -> HTMLResponse:
+    return _stub_page(
+        "Leases",
+        "Lease visibility will show active issue and reviewer PR leases.",
+    )
+
+
+async def method_not_allowed(request: Request, _exc: Exception) -> Response:
+    if request.method not in _READ_ONLY_METHODS:
+        return JSONResponse(
+            {"error": "read-only-mvp", "detail": f"{request.method} not permitted"},
+            status_code=405,
+        )
+    return JSONResponse({"error": "not_found"}, status_code=404)
+
+
+def create_app() -> Starlette:
+    """Build the read-only MVP Starlette app."""
+    return Starlette(
+        debug=False,
+        routes=[
+            Route("/", home, methods=["GET"]),
+            Route("/health", health, methods=["GET"]),
+            Route("/queue", queue, methods=["GET"]),
+            Route("/api/queue", api_queue, methods=["GET"]),
+            Route("/projects", projects, methods=["GET"]),
+            Route("/projects/{project_id}", project_detail, methods=["GET"]),
+            Route("/api/projects", api_projects, methods=["GET"]),
+            Route("/prompts", prompts, methods=["GET"]),
+            Route("/prompts/{prompt_id}", prompt_detail, methods=["GET"]),
+            Route("/api/prompts", api_prompts, methods=["GET"]),
+            Route("/runtime", runtime, methods=["GET"]),
+            Route("/audit", audit, methods=["GET"]),
+            Route("/worktrees", worktrees, methods=["GET"]),
+            Route("/leases", leases, methods=["GET"]),
+        ],
+        exception_handlers={405: method_not_allowed},
+    )

webui/data/projects.registry.json

@@ -0,0 +1,49 @@
+{
+  "version": 1,
+  "projects": [
+    {
+      "id": "gitea-tools",
+      "repo_name": "Gitea-Tools",
+      "gitea_owner": "Scaled-Tech-Consulting",
+      "remote_host": "https://gitea.prgs.cc",
+      "default_branch": "master",
+      "local_checkout_path": ".",
+      "profiles": {
+        "author": "prgs-author",
+        "reviewer": "prgs-reviewer",
+        "reconciler": "prgs-reconciler"
+      },
+      "workflow_paths": {
+        "skill": "skills/llm-project-workflow/SKILL.md",
+        "work_issue": "skills/llm-project-workflow/workflows/work-issue.md",
+        "review_merge": "skills/llm-project-workflow/workflows/review-merge-pr.md"
+      },
+      "schema_paths": {
+        "mcp_config_v2": "gitea-mcp.v2-contexts.example.json",
+        "mcp_config_v1": "gitea-mcp.example.json"
+      },
+      "onboarding_checklist": [
+        {
+          "id": "profiles",
+          "title": "Configure execution profiles",
+          "description": "Install author, reviewer, and reconciler MCP profiles (prgs-author, prgs-reviewer, prgs-reconciler) in separate namespaces. Tokens stay in keychain — never in this registry."
+        },
+        {
+          "id": "mcp_config",
+          "title": "Wire MCP v2 contexts",
+          "description": "Copy and customize gitea-mcp.v2-contexts.example.json for your machine. Map this repo path under projects with default_owner Scaled-Tech-Consulting and default_repo Gitea-Tools."
+        },
+        {
+          "id": "wiki_gate",
+          "title": "Wiki publication readiness",
+          "description": "For wiki-tracked work, satisfy the live Gitea Wiki proof gate (#224) before closing issues. See docs/wiki/Safety-and-Gates.md."
+        },
+        {
+          "id": "branches_layout",
+          "title": "Isolate work under branches/",
+          "description": "All LLM task edits happen in worktrees under branches/. Main checkout stays clean; use skills/llm-project-workflow templates for start-issue and review flows."
+        }
+      ]
+    }
+  ]
+}

webui/layout.py

@@ -0,0 +1,176 @@
+"""Shared HTML layout for the internal web UI."""
+
+from __future__ import annotations
+
+NAV_ITEMS = (
+    ("/", "Home"),
+    ("/queue", "Queue"),
+    ("/projects", "Projects"),
+    ("/prompts", "Prompts"),
+    ("/runtime", "Runtime"),
+    ("/audit", "Audit"),
+    ("/worktrees", "Worktrees"),
+    ("/leases", "Leases"),
+)
+
+MVP_NOTICE = (
+    "Read-only MVP — Gitea, MCP tools, and canonical workflows remain the "
+    "source of truth. No mutation endpoints."
+)
+
+
+def render_page(*, title: str, body_html: str, extra_head: str = "") -> str:
+    nav_links = "".join(
+        f'<a href="{href}">{label}</a>' for href, label in NAV_ITEMS
+    )
+    return f"""<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>{title} · MCP Control Plane</title>
+  <style>
+    :root {{
+      --bg: #0f1419;
+      --surface: #1a2332;
+      --text: #e7ecf3;
+      --muted: #8b9cb3;
+      --accent: #5b9fd4;
+      --border: #2a3648;
+    }}
+    * {{ box-sizing: border-box; }}
+    body {{
+      margin: 0;
+      font-family: system-ui, -apple-system, sans-serif;
+      background: var(--bg);
+      color: var(--text);
+      line-height: 1.5;
+    }}
+    header {{
+      background: var(--surface);
+      border-bottom: 1px solid var(--border);
+      padding: 0.75rem 1.25rem;
+    }}
+    header h1 {{
+      margin: 0 0 0.5rem;
+      font-size: 1.1rem;
+      font-weight: 600;
+    }}
+    nav {{
+      display: flex;
+      flex-wrap: wrap;
+      gap: 0.75rem 1rem;
+    }}
+    nav a {{
+      color: var(--accent);
+      text-decoration: none;
+      font-size: 0.9rem;
+    }}
+    nav a:hover {{ text-decoration: underline; }}
+    main {{
+      max-width: 52rem;
+      margin: 0 auto;
+      padding: 1.5rem 1.25rem 2.5rem;
+    }}
+    .notice {{
+      color: var(--muted);
+      font-size: 0.85rem;
+      margin-bottom: 1.25rem;
+      padding: 0.65rem 0.85rem;
+      border: 1px solid var(--border);
+      border-radius: 6px;
+      background: var(--surface);
+    }}
+    h2 {{ margin-top: 0; font-size: 1.35rem; }}
+    p {{ color: var(--muted); }}
+    .stub {{
+      border-left: 3px solid var(--accent);
+      padding-left: 0.85rem;
+      margin: 1rem 0;
+    }}
+    .meta {{ font-size: 0.85rem; }}
+    table.registry, table.detail {{
+      width: 100%;
+      border-collapse: collapse;
+      margin: 1rem 0;
+      font-size: 0.9rem;
+    }}
+    table.registry th, table.registry td,
+    table.detail th, table.detail td {{
+      text-align: left;
+      padding: 0.45rem 0.6rem;
+      border-bottom: 1px solid var(--border);
+    }}
+    table.registry th, table.detail th {{
+      color: var(--muted);
+      font-weight: 500;
+    }}
+    code {{
+      font-family: ui-monospace, monospace;
+      font-size: 0.85em;
+      color: var(--text);
+    }}
+    ol.checklist {{
+      padding-left: 1.25rem;
+      margin: 0.5rem 0 1.5rem;
+    }}
+    ol.checklist li {{ margin-bottom: 0.85rem; }}
+    ol.checklist p {{ margin: 0.25rem 0 0; font-size: 0.9rem; }}
+    .prompt-card {{
+      margin: 1.25rem 0 1.75rem;
+      padding: 1rem 1.1rem;
+      border: 1px solid var(--border);
+      border-radius: 8px;
+      background: var(--surface);
+    }}
+    .prompt-card h3 {{ margin: 0 0 0.5rem; font-size: 1.05rem; }}
+    pre.prompt-text {{
+      white-space: pre-wrap;
+      word-break: break-word;
+      margin: 0.75rem 0;
+      padding: 0.75rem 0.85rem;
+      border-radius: 6px;
+      background: var(--bg);
+      border: 1px solid var(--border);
+      font-size: 0.9rem;
+      color: var(--text);
+    }}
+    .copy-btn {{
+      background: var(--accent);
+      color: #0b1219;
+      border: none;
+      border-radius: 6px;
+      padding: 0.4rem 0.85rem;
+      font-size: 0.85rem;
+      cursor: pointer;
+    }}
+    .copy-btn:hover {{ filter: brightness(1.08); }}
+    .muted {{ color: var(--muted); }}
+    .badges {{ display: inline-flex; flex-wrap: wrap; gap: 0.35rem; margin-left: 0.5rem; }}
+    .badge {{
+      font-size: 0.72rem;
+      padding: 0.1rem 0.45rem;
+      border-radius: 999px;
+      border: 1px solid var(--border);
+      color: var(--muted);
+      text-transform: lowercase;
+    }}
+    .badge-claimed {{ color: #8fd19e; border-color: #3d6b4a; }}
+    .badge-blocked {{ color: #f0a8a8; border-color: #7a3b3b; }}
+    .badge-in-review {{ color: #9ec8f0; border-color: #3d5f7a; }}
+    .badge-duplicate {{ color: #e0c27a; border-color: #6b5730; }}
+    .badge-stale {{ color: #c9b8e8; border-color: #5a4a78; }}
+  </style>
+  {extra_head}
+</head>
+<body>
+  <header>
+    <h1>MCP Control Plane</h1>
+    <nav>{nav_links}</nav>
+  </header>
+  <main>
+    <p class="notice">{MVP_NOTICE}</p>
+    {body_html}
+  </main>
+</body>
+</html>"""

webui/project_registry.py

@@ -0,0 +1,196 @@
+"""Load and validate the web UI project registry (#427)."""
+
+from __future__ import annotations
+
+import json
+import os
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+_FORBIDDEN_EXACT_KEYS = frozenset({
+    "token",
+    "password",
+    "secret",
+    "credential",
+    "auth",
+    "api_key",
+    "api-key",
+})
+_FORBIDDEN_KEY_PREFIXES = ("auth_", "api_key_", "api-key_")
+_FORBIDDEN_KEY_SUFFIXES = ("_token", "_secret", "_password", "_credential", "_auth")
+
+
+def _is_forbidden_key(key: str) -> bool:
+    lowered = key.lower()
+    if lowered in _FORBIDDEN_EXACT_KEYS:
+        return True
+    return (
+        lowered.startswith(_FORBIDDEN_KEY_PREFIXES)
+        or lowered.endswith(_FORBIDDEN_KEY_SUFFIXES)
+    )
+
+_REQUIRED_PROJECT_FIELDS = (
+    "id",
+    "repo_name",
+    "gitea_owner",
+    "remote_host",
+    "default_branch",
+    "local_checkout_path",
+    "profiles",
+    "workflow_paths",
+)
+
+_REQUIRED_PROFILE_ROLES = ("author", "reviewer", "reconciler")
+
+
+@dataclass(frozen=True)
+class OnboardingStep:
+    id: str
+    title: str
+    description: str
+
+
+@dataclass(frozen=True)
+class ProjectRecord:
+    id: str
+    repo_name: str
+    gitea_owner: str
+    remote_host: str
+    default_branch: str
+    local_checkout_path: str
+    profiles: dict[str, str]
+    workflow_paths: dict[str, str]
+    schema_paths: dict[str, str]
+    onboarding_checklist: tuple[OnboardingStep, ...]
+
+
+@dataclass(frozen=True)
+class ProjectRegistry:
+    version: int
+    projects: tuple[ProjectRecord, ...]
+    source_path: Path
+
+
+def default_registry_path() -> Path:
+    override = os.environ.get("WEBUI_PROJECT_REGISTRY", "").strip()
+    if override:
+        return Path(override).expanduser().resolve()
+    return (Path(__file__).resolve().parent / "data" / "projects.registry.json").resolve()
+
+
+def _reject_credential_keys(obj: Any, *, path: str = "") -> None:
+    if isinstance(obj, dict):
+        for key, value in obj.items():
+            key_path = f"{path}.{key}" if path else key
+            if _is_forbidden_key(key):
+                raise ValueError(f"registry must not store credentials ({key_path})")
+            _reject_credential_keys(value, path=key_path)
+    elif isinstance(obj, list):
+        for index, item in enumerate(obj):
+            _reject_credential_keys(item, path=f"{path}[{index}]")
+
+
+def _parse_onboarding(raw: list[dict[str, Any]] | None) -> tuple[OnboardingStep, ...]:
+    if not raw:
+        return ()
+    steps: list[OnboardingStep] = []
+    for item in raw:
+        steps.append(
+            OnboardingStep(
+                id=str(item["id"]),
+                title=str(item["title"]),
+                description=str(item["description"]),
+            )
+        )
+    return tuple(steps)
+
+
+def _parse_project(raw: dict[str, Any]) -> ProjectRecord:
+    missing = [field for field in _REQUIRED_PROJECT_FIELDS if field not in raw]
+    if missing:
+        raise ValueError(f"project missing required fields: {', '.join(missing)}")
+
+    profiles = raw["profiles"]
+    if not isinstance(profiles, dict):
+        raise ValueError("profiles must be an object")
+    for role in _REQUIRED_PROFILE_ROLES:
+        if role not in profiles or not profiles[role]:
+            raise ValueError(f"profiles.{role} is required")
+
+    workflow_paths = raw["workflow_paths"]
+    if not isinstance(workflow_paths, dict) or not workflow_paths:
+        raise ValueError("workflow_paths must be a non-empty object")
+
+    schema_paths = raw.get("schema_paths") or {}
+    if not isinstance(schema_paths, dict):
+        raise ValueError("schema_paths must be an object when present")
+
+    return ProjectRecord(
+        id=str(raw["id"]),
+        repo_name=str(raw["repo_name"]),
+        gitea_owner=str(raw["gitea_owner"]),
+        remote_host=str(raw["remote_host"]),
+        default_branch=str(raw["default_branch"]),
+        local_checkout_path=str(raw["local_checkout_path"]),
+        profiles={role: str(profiles[role]) for role in _REQUIRED_PROFILE_ROLES},
+        workflow_paths={key: str(value) for key, value in workflow_paths.items()},
+        schema_paths={key: str(value) for key, value in schema_paths.items()},
+        onboarding_checklist=_parse_onboarding(raw.get("onboarding_checklist")),
+    )
+
+
+def load_registry(path: Path | None = None) -> ProjectRegistry:
+    """Load the versioned project registry from disk."""
+    source = (path or default_registry_path()).resolve()
+    raw_text = source.read_text(encoding="utf-8")
+    payload = json.loads(raw_text)
+    if not isinstance(payload, dict):
+        raise ValueError("registry root must be an object")
+
+    version = payload.get("version")
+    if version != 1:
+        raise ValueError(f"unsupported registry version: {version!r}")
+
+    _reject_credential_keys(payload)
+
+    projects_raw = payload.get("projects")
+    if not isinstance(projects_raw, list) or not projects_raw:
+        raise ValueError("projects must be a non-empty array")
+
+    projects = tuple(_parse_project(item) for item in projects_raw)
+    return ProjectRegistry(version=version, projects=projects, source_path=source)
+
+
+def project_to_dict(project: ProjectRecord) -> dict[str, Any]:
+    """Serialize a project for JSON API responses."""
+    return {
+        "id": project.id,
+        "repo_name": project.repo_name,
+        "gitea_owner": project.gitea_owner,
+        "remote_host": project.remote_host,
+        "default_branch": project.default_branch,
+        "local_checkout_path": project.local_checkout_path,
+        "profiles": dict(project.profiles),
+        "workflow_paths": dict(project.workflow_paths),
+        "schema_paths": dict(project.schema_paths),
+        "onboarding_checklist": [
+            {"id": step.id, "title": step.title, "description": step.description}
+            for step in project.onboarding_checklist
+        ],
+    }
+
+
+def registry_to_dict(registry: ProjectRegistry) -> dict[str, Any]:
+    return {
+        "version": registry.version,
+        "source_path": str(registry.source_path),
+        "projects": [project_to_dict(project) for project in registry.projects],
+    }
+
+
+def find_project(registry: ProjectRegistry, project_id: str) -> ProjectRecord | None:
+    for project in registry.projects:
+        if project.id == project_id:
+            return project
+    return None

webui/project_views.py

@@ -0,0 +1,93 @@
+"""HTML views for project registry pages (#427)."""
+
+from __future__ import annotations
+
+import html
+
+from webui.layout import render_page
+from webui.project_registry import ProjectRecord, ProjectRegistry
+
+
+def _escape(text: str) -> str:
+    return html.escape(text, quote=True)
+
+
+def render_projects_list(registry: ProjectRegistry) -> str:
+    rows = []
+    for project in registry.projects:
+        rows.append(
+            "<tr>"
+            f"<td><a href=\"/projects/{_escape(project.id)}\">{_escape(project.repo_name)}</a></td>"
+            f"<td>{_escape(project.gitea_owner)}</td>"
+            f"<td>{_escape(project.remote_host)}</td>"
+            f"<td>{_escape(project.default_branch)}</td>"
+            f"<td><code>{_escape(project.profiles['author'])}</code></td>"
+            "</tr>"
+        )
+    table = (
+        "<table class=\"registry\">"
+        "<thead><tr>"
+        "<th>Repository</th><th>Owner</th><th>Remote</th>"
+        "<th>Branch</th><th>Author profile</th>"
+        "</tr></thead>"
+        f"<tbody>{''.join(rows)}</tbody></table>"
+    )
+    body = (
+        "<h2>Projects</h2>"
+        "<p>Configured repositories managed by the MCP Control Plane.</p>"
+        f"<p class=\"meta\">Registry: <code>{_escape(str(registry.source_path))}</code> "
+        f"(version {registry.version})</p>"
+        f"{table}"
+        "<p><a href=\"/api/projects\">JSON API</a></p>"
+    )
+    return render_page(title="Projects", body_html=body)
+
+
+def render_project_detail(project: ProjectRecord) -> str:
+    profile_rows = "".join(
+        f"<tr><th>{_escape(role)}</th><td><code>{_escape(name)}</code></td></tr>"
+        for role, name in project.profiles.items()
+    )
+    workflow_rows = "".join(
+        f"<tr><th>{_escape(key)}</th><td><code>{_escape(path)}</code></td></tr>"
+        for key, path in project.workflow_paths.items()
+    )
+    schema_rows = "".join(
+        f"<tr><th>{_escape(key)}</th><td><code>{_escape(path)}</code></td></tr>"
+        for key, path in project.schema_paths.items()
+    )
+    checklist_items = []
+    for index, step in enumerate(project.onboarding_checklist, start=1):
+        checklist_items.append(
+            "<li>"
+            f"<strong>{index}. {_escape(step.title)}</strong>"
+            f"<p>{_escape(step.description)}</p>"
+            "</li>"
+        )
+    checklist_html = (
+        "<ol class=\"checklist\">" + "".join(checklist_items) + "</ol>"
+        if checklist_items
+        else "<p>No onboarding steps defined.</p>"
+    )
+    body = (
+        f"<h2>{_escape(project.repo_name)}</h2>"
+        "<p><a href=\"/projects\">← All projects</a></p>"
+        "<h3>Identity</h3>"
+        "<table class=\"detail\">"
+        f"<tr><th>Registry id</th><td><code>{_escape(project.id)}</code></td></tr>"
+        f"<tr><th>Gitea owner</th><td>{_escape(project.gitea_owner)}</td></tr>"
+        f"<tr><th>Remote host</th><td>{_escape(project.remote_host)}</td></tr>"
+        f"<tr><th>Default branch</th><td><code>{_escape(project.default_branch)}</code></td></tr>"
+        f"<tr><th>Local checkout</th><td><code>{_escape(project.local_checkout_path)}</code></td></tr>"
+        "</table>"
+        "<h3>Profiles</h3>"
+        f"<table class=\"detail\">{profile_rows}</table>"
+        "<h3>Workflow paths</h3>"
+        f"<table class=\"detail\">{workflow_rows}</table>"
+        "<h3>Schema paths</h3>"
+        f"<table class=\"detail\">{schema_rows}</table>"
+        "<h3>Onboarding checklist</h3>"
+        "<p class=\"meta\">Read-only MVP — complete these steps outside the UI.</p>"
+        f"{checklist_html}"
+    )
+    return render_page(title=project.repo_name, body_html=body)

webui/prompt_library.py

@@ -0,0 +1,197 @@
+"""Canonical workflow prompt library for the internal web UI (#428)."""
+
+from __future__ import annotations
+
+import hashlib
+import os
+import re
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+_WORKFLOW_ROOT = Path("skills/llm-project-workflow/workflows")
+
+_DEFAULT_PROMPT_RE = re.compile(
+    r"\*\*Default task prompt:\*\*\s*\n+>\s*(.+?)(?=\n\n|\nDo not improvise)",
+    re.DOTALL,
+)
+_FRONTMATTER_TASK_MODE_RE = re.compile(r"^task_mode:\s*(\S+)", re.MULTILINE)
+
+
+@dataclass(frozen=True)
+class PromptEntry:
+    slug: str
+    label: str
+    prompt_text: str
+    workflow_path: str
+    task_mode: str | None
+    workflow_hash: str | None
+    source_note: str
+
+
+def _repo_root() -> Path:
+    override = (os.environ.get("WEBUI_REPO_ROOT") or "").strip()
+    if override:
+        return Path(override).resolve()
+    return Path(__file__).resolve().parent.parent
+
+
+def _workflow_file(path: str) -> Path:
+    return _repo_root() / path
+
+
+def _sha256_hex(content: str) -> str:
+    return hashlib.sha256(content.encode("utf-8")).hexdigest()
+
+
+def _read_workflow(path: str) -> tuple[str, str]:
+    file_path = _workflow_file(path)
+    text = file_path.read_text(encoding="utf-8")
+    return text, _sha256_hex(text)
+
+
+def _extract_default_prompt(markdown: str) -> str | None:
+    match = _DEFAULT_PROMPT_RE.search(markdown)
+    if not match:
+        return None
+    lines = [line.strip() for line in match.group(1).splitlines()]
+    return " ".join(line for line in lines if line)
+
+
+def _extract_task_mode(markdown: str) -> str | None:
+    match = _FRONTMATTER_TASK_MODE_RE.search(markdown)
+    return match.group(1) if match else None
+
+
+def _entry_from_workflow(
+    *,
+    slug: str,
+    label: str,
+    workflow_path: str,
+    prompt_override: str | None = None,
+    source_note: str = "",
+) -> PromptEntry:
+    markdown, digest = _read_workflow(workflow_path)
+    prompt_text = prompt_override or _extract_default_prompt(markdown)
+    if not prompt_text:
+        raise ValueError(f"No default task prompt found in {workflow_path}")
+    return PromptEntry(
+        slug=slug,
+        label=label,
+        prompt_text=prompt_text,
+        workflow_path=workflow_path,
+        task_mode=_extract_task_mode(markdown),
+        workflow_hash=digest,
+        source_note=source_note,
+    )
+
+
+def _static_entry(
+    *,
+    slug: str,
+    label: str,
+    prompt_text: str,
+    workflow_path: str,
+    source_note: str,
+) -> PromptEntry:
+    path = _workflow_file(workflow_path)
+    digest = _sha256_hex(path.read_text(encoding="utf-8")) if path.is_file() else None
+    markdown = path.read_text(encoding="utf-8") if path.is_file() else ""
+    return PromptEntry(
+        slug=slug,
+        label=label,
+        prompt_text=prompt_text,
+        workflow_path=workflow_path,
+        task_mode=_extract_task_mode(markdown) if markdown else None,
+        workflow_hash=digest,
+        source_note=source_note,
+    )
+
+
+def load_prompt_library() -> tuple[PromptEntry, ...]:
+    """Load operator prompts derived from canonical workflows."""
+    entries = (
+        _entry_from_workflow(
+            slug="review-pr",
+            label="Review PR",
+            workflow_path=str(_WORKFLOW_ROOT / "review-merge-pr.md"),
+        ),
+        _entry_from_workflow(
+            slug="work-issue",
+            label="Work issue",
+            workflow_path=str(_WORKFLOW_ROOT / "work-issue.md"),
+        ),
+        _entry_from_workflow(
+            slug="create-issue",
+            label="Create issue",
+            workflow_path=str(_WORKFLOW_ROOT / "create-issue.md"),
+        ),
+        _static_entry(
+            slug="comment-issue",
+            label="Comment on issue",
+            workflow_path=str(_WORKFLOW_ROOT / "create-issue.md"),
+            prompt_text=(
+                "Comment on the target Gitea issue only if exact comment_issue "
+                "capability is proven. Load the canonical create-issue workflow "
+                "first and follow §16 (comment-on-existing issue rule). Include "
+                "specific evidence; do not duplicate existing comments."
+            ),
+            source_note="Derived from create-issue.md §16; full policy remains in the workflow file.",
+        ),
+        _static_entry(
+            slug="cleanup",
+            label="Post-merge cleanup",
+            workflow_path="skills/llm-project-workflow/templates/worktree-cleanup.md",
+            prompt_text=(
+                "Task: clean up branch/worktree for PR #<pr> / issue #<n> after merge. "
+                "Confirm the merge on remote master before any deletion; never "
+                "force-remove a dirty worktree."
+            ),
+            source_note="Full cleanup steps live in templates/worktree-cleanup.md.",
+        ),
+        _entry_from_workflow(
+            slug="audit",
+            label="Reconciliation audit",
+            workflow_path=str(_WORKFLOW_ROOT / "reconcile-landed-pr.md"),
+        ),
+        _static_entry(
+            slug="onboarding",
+            label="Project onboarding",
+            workflow_path="skills/llm-project-workflow/SKILL.md",
+            prompt_text=(
+                "Onboard this repository into the MCP Control Plane: prove identity "
+                "and task capability, configure author/reviewer/reconciler profiles "
+                "in separate namespaces, then complete the checklist at /projects. "
+                "Canonical router: skills/llm-project-workflow/SKILL.md."
+            ),
+            source_note="Checklist details live in webui/data/projects.registry.json and /projects.",
+        ),
+    )
+    return entries
+
+
+def find_prompt(slug: str) -> PromptEntry | None:
+    for entry in load_prompt_library():
+        if entry.slug == slug:
+            return entry
+    return None
+
+
+def prompt_to_dict(entry: PromptEntry) -> dict[str, Any]:
+    return {
+        "slug": entry.slug,
+        "label": entry.label,
+        "prompt_text": entry.prompt_text,
+        "workflow_path": entry.workflow_path,
+        "task_mode": entry.task_mode,
+        "workflow_hash": entry.workflow_hash,
+        "source_note": entry.source_note,
+    }
+
+
+def library_to_dict() -> dict[str, Any]:
+    entries = load_prompt_library()
+    return {
+        "count": len(entries),
+        "prompts": [prompt_to_dict(entry) for entry in entries],
+    }

webui/prompt_views.py

@@ -0,0 +1,87 @@
+"""HTML views for the prompt library (#428)."""
+
+from __future__ import annotations
+
+import html
+
+from webui.layout import render_page
+from webui.prompt_library import PromptEntry, load_prompt_library
+
+
+def _escape(text: str) -> str:
+    return html.escape(text, quote=True)
+
+
+def _render_prompt_card(entry: PromptEntry) -> str:
+    hash_short = (
+        f"<code>{_escape(entry.workflow_hash[:12])}</code>"
+        if entry.workflow_hash
+        else "<span class=\"muted\">n/a</span>"
+    )
+    task_mode = (
+        f"<code>{_escape(entry.task_mode)}</code>"
+        if entry.task_mode
+        else "<span class=\"muted\">n/a</span>"
+    )
+    note = (
+        f'<p class="meta">{_escape(entry.source_note)}</p>'
+        if entry.source_note
+        else ""
+    )
+    prompt_id = f"prompt-{entry.slug}"
+    return (
+        f'<section class="prompt-card" id="{_escape(entry.slug)}">'
+        f"<h3>{_escape(entry.label)}</h3>"
+        f'<p class="meta">Workflow: <code>{_escape(entry.workflow_path)}</code> · '
+        f"task_mode: {task_mode} · sha256: {hash_short}</p>"
+        f'<pre class="prompt-text" id="{prompt_id}">{_escape(entry.prompt_text)}</pre>'
+        f'<button type="button" class="copy-btn" data-copy-target="{prompt_id}">'
+        "Copy prompt</button>"
+        f"{note}"
+        "</section>"
+    )
+
+
+PROMPT_PAGE_SCRIPT = """
+<script>
+document.querySelectorAll('.copy-btn').forEach((btn) => {
+  btn.addEventListener('click', async () => {
+    const targetId = btn.getAttribute('data-copy-target');
+    const node = document.getElementById(targetId);
+    if (!node) return;
+    const text = node.textContent || '';
+    try {
+      await navigator.clipboard.writeText(text);
+      const prior = btn.textContent;
+      btn.textContent = 'Copied';
+      setTimeout(() => { btn.textContent = prior; }, 1200);
+    } catch (_err) {
+      btn.textContent = 'Copy failed';
+    }
+  });
+});
+</script>
+"""
+
+
+def render_prompts_page() -> str:
+    entries = load_prompt_library()
+    cards = "".join(_render_prompt_card(entry) for entry in entries)
+    body = (
+        "<h2>Prompt library</h2>"
+        "<p>Short copy/paste task prompts derived from canonical workflows. "
+        "Full policy remains in the cited workflow files — not duplicated here.</p>"
+        f"{cards}"
+        "<p><a href=\"/api/prompts\">JSON API</a></p>"
+        f"{PROMPT_PAGE_SCRIPT}"
+    )
+    return render_page(title="Prompts", body_html=body)
+
+
+def render_prompt_detail(entry: PromptEntry) -> str:
+    body = (
+        f"<p><a href=\"/prompts\">← All prompts</a></p>"
+        f"{_render_prompt_card(entry)}"
+        f"{PROMPT_PAGE_SCRIPT}"
+    )
+    return render_page(title=entry.label, body_html=body)

webui/queue_loader.py

@@ -0,0 +1,385 @@
+"""Load live Gitea PR/issue queue state for the web UI dashboard (#429)."""
+
+from __future__ import annotations
+
+import re
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from typing import Any, Callable
+from urllib.parse import urlparse
+
+from gitea_auth import api_fetch_page, get_auth_header, repo_api_url
+
+from webui.project_registry import ProjectRecord, load_registry
+
+_CLOSES_RE = re.compile(r"(?:closes|fixes|resolves)\s+#(\d+)", re.I)
+_ISSUE_REF_RE = re.compile(r"#(\d+)")
+_STALE_DAYS = 14
+
+
+@dataclass(frozen=True)
+class PaginationMeta:
+    page: int
+    per_page: int
+    returned_count: int
+    has_more: bool
+    is_final_page: bool
+    inventory_complete: bool
+    pages_fetched: int
+
+
+@dataclass(frozen=True)
+class QueueItem:
+    number: int
+    title: str
+    badges: tuple[str, ...]
+    extra: dict[str, str]
+
+
+@dataclass(frozen=True)
+class QueueSnapshot:
+    project_id: str
+    repo_label: str
+    prs: tuple[QueueItem, ...]
+    issues: tuple[QueueItem, ...]
+    pr_pagination: PaginationMeta | None
+    issue_pagination: PaginationMeta | None
+    fetch_error: str | None = None
+
+
+def _host_from_url(remote_host: str) -> str:
+    parsed = urlparse(remote_host.strip())
+    return parsed.netloc or remote_host.strip().rstrip("/")
+
+
+def _extract_linked_issue(title: str | None, body: str | None = None) -> int | None:
+    for text in (title, body):
+        if not text:
+            continue
+        match = _CLOSES_RE.search(text)
+        if match:
+            return int(match.group(1))
+    if body:
+        refs = _ISSUE_REF_RE.findall(body)
+        if refs:
+            return int(refs[0])
+    return None
+
+
+def _is_stale(updated_at: str | None) -> bool:
+    if not updated_at:
+        return False
+    try:
+        normalized = updated_at.replace("Z", "+00:00")
+        parsed = datetime.fromisoformat(normalized)
+        if parsed.tzinfo is None:
+            parsed = parsed.replace(tzinfo=timezone.utc)
+        age = datetime.now(timezone.utc) - parsed.astimezone(timezone.utc)
+        return age.days >= _STALE_DAYS
+    except ValueError:
+        return False
+
+
+def _classify_pr(
+    pr: dict,
+    *,
+    issue_claimed: set[int],
+    issue_to_prs: dict[int, list[int]],
+) -> tuple[str, ...]:
+    badges: list[str] = []
+    mergeable = pr.get("mergeable")
+    if mergeable is False:
+        badges.append("blocked")
+    linked = _extract_linked_issue(pr.get("title"), pr.get("body"))
+    if linked is not None:
+        if linked in issue_claimed:
+            badges.append("claimed")
+        if len(issue_to_prs.get(linked, [])) > 1:
+            badges.append("duplicate")
+    if _is_stale(pr.get("updated_at")):
+        badges.append("stale")
+    if mergeable is True and "blocked" not in badges:
+        badges.append("in-review")
+    if not badges:
+        badges.append("open")
+    return tuple(dict.fromkeys(badges))
+
+
+def _classify_issue(
+    issue: dict,
+    *,
+    linked_prs: list[int],
+) -> tuple[str, ...]:
+    badges: list[str] = []
+    labels = [lb.get("name", "") for lb in issue.get("labels", [])]
+    if "status:in-progress" in labels:
+        badges.append("claimed")
+    if len(linked_prs) > 1:
+        badges.append("duplicate")
+    elif linked_prs and "claimed" not in badges:
+        badges.append("in-review")
+    if _is_stale(issue.get("updated_at")):
+        badges.append("stale")
+    if not badges:
+        badges.append("open")
+    return tuple(dict.fromkeys(badges))
+
+
+def _format_pr_item(pr: dict, badges: tuple[str, ...]) -> QueueItem:
+    head = pr.get("head") or {}
+    base = pr.get("base") or {}
+    mergeable = pr.get("mergeable")
+    merge_label = (
+        "mergeable" if mergeable is True else "conflicted" if mergeable is False else "unknown"
+    )
+    linked = _extract_linked_issue(pr.get("title"), pr.get("body"))
+    return QueueItem(
+        number=int(pr["number"]),
+        title=str(pr.get("title") or ""),
+        badges=badges,
+        extra={
+            "branch": f"{head.get('ref', '?')} → {base.get('ref', '?')}",
+            "head_sha": str(head.get("sha") or "")[:12],
+            "mergeable": merge_label,
+            "linked_issue": str(linked) if linked is not None else "",
+        },
+    )
+
+
+def _format_issue_item(issue: dict, badges: tuple[str, ...]) -> QueueItem:
+    labels = ", ".join(lb.get("name", "") for lb in issue.get("labels", []))
+    assignee = (issue.get("assignee") or {}).get("login", "")
+    return QueueItem(
+        number=int(issue["number"]),
+        title=str(issue.get("title") or ""),
+        badges=badges,
+        extra={
+            "labels": labels or "—",
+            "assignee": assignee or "unassigned",
+            "state": str(issue.get("state") or ""),
+        },
+    )
+
+
+def _pagination_from_pages(
+    *,
+    per_page: int,
+    pages_fetched: int,
+    returned_count: int,
+    is_final_page: bool,
+) -> PaginationMeta:
+    return PaginationMeta(
+        page=1,
+        per_page=per_page,
+        returned_count=returned_count,
+        has_more=not is_final_page,
+        is_final_page=is_final_page,
+        inventory_complete=is_final_page,
+        pages_fetched=pages_fetched,
+    )
+
+
+def _fetch_prs(
+    host: str,
+    org: str,
+    repo: str,
+    auth: str,
+    *,
+    per_page: int = 50,
+) -> tuple[list[dict], PaginationMeta]:
+    url = f"{repo_api_url(host, org, repo)}/pulls?state=open"
+    all_raw: list[dict] = []
+    pages_fetched = 0
+    is_final = False
+    page = 1
+    while pages_fetched < 20:
+        raw_page, meta = api_fetch_page(url, auth, page=page, limit=per_page)
+        pages_fetched += 1
+        all_raw.extend(raw_page)
+        is_final = bool(meta["is_final_page"])
+        if is_final:
+            break
+        page += 1
+    pagination = _pagination_from_pages(
+        per_page=per_page,
+        pages_fetched=pages_fetched,
+        returned_count=len(all_raw),
+        is_final_page=is_final,
+    )
+    return all_raw, pagination
+
+
+def _fetch_issues(
+    host: str,
+    org: str,
+    repo: str,
+    auth: str,
+    *,
+    per_page: int = 50,
+) -> tuple[list[dict], PaginationMeta]:
+    url = f"{repo_api_url(host, org, repo)}/issues?state=open&type=issues"
+    all_raw: list[dict] = []
+    page = 1
+    pages_fetched = 0
+    is_final = False
+    while pages_fetched < 20:
+        raw_page, meta = api_fetch_page(url, auth, page=page, limit=per_page)
+        pages_fetched += 1
+        all_raw.extend(raw_page)
+        is_final = bool(meta["is_final_page"])
+        if is_final:
+            break
+        page += 1
+    pagination = _pagination_from_pages(
+        per_page=per_page,
+        pages_fetched=pages_fetched,
+        returned_count=len(all_raw),
+        is_final_page=is_final,
+    )
+    return all_raw, pagination
+
+
+def load_queue_snapshot(
+    project_id: str | None = None,
+    *,
+    fetch_prs: Callable[..., tuple[list[dict], PaginationMeta]] | None = None,
+    fetch_issues: Callable[..., tuple[list[dict], PaginationMeta]] | None = None,
+) -> QueueSnapshot:
+    """Load open PR and issue queues for a registry project (default: first entry)."""
+    registry = load_registry()
+    project: ProjectRecord | None = None
+    if project_id:
+        for entry in registry.projects:
+            if entry.id == project_id:
+                project = entry
+                break
+    else:
+        project = registry.projects[0] if registry.projects else None
+
+    if project is None:
+        return QueueSnapshot(
+            project_id=project_id or "",
+            repo_label="",
+            prs=(),
+            issues=(),
+            pr_pagination=None,
+            issue_pagination=None,
+            fetch_error="project not found in registry",
+        )
+
+    host = _host_from_url(project.remote_host)
+    pr_fetch = fetch_prs or _fetch_prs
+    issue_fetch = fetch_issues or _fetch_issues
+    using_live_fetch = fetch_prs is None or fetch_issues is None
+    auth = get_auth_header(host) if using_live_fetch else "test-auth"
+    if using_live_fetch and not auth:
+        return QueueSnapshot(
+            project_id=project.id,
+            repo_label=f"{project.gitea_owner}/{project.repo_name}",
+            prs=(),
+            issues=(),
+            pr_pagination=None,
+            issue_pagination=None,
+            fetch_error=(
+                f"Gitea credentials unavailable for {host}; "
+                "queue cannot be loaded (fail closed — not showing empty queue)"
+            ),
+        )
+
+    try:
+        raw_prs, pr_pagination = pr_fetch(
+            host, project.gitea_owner, project.repo_name, auth
+        )
+        raw_issues, issue_pagination = issue_fetch(
+            host, project.gitea_owner, project.repo_name, auth
+        )
+    except Exception as exc:  # noqa: BLE001 — surface operator-visible fetch errors
+        return QueueSnapshot(
+            project_id=project.id,
+            repo_label=f"{project.gitea_owner}/{project.repo_name}",
+            prs=(),
+            issues=(),
+            pr_pagination=None,
+            issue_pagination=None,
+            fetch_error=f"Gitea fetch failed: {exc}",
+        )
+
+    issue_to_prs: dict[int, list[int]] = {}
+    for pr in raw_prs:
+        linked = _extract_linked_issue(pr.get("title"), pr.get("body"))
+        if linked is not None:
+            issue_to_prs.setdefault(linked, []).append(int(pr["number"]))
+
+    issue_claimed = {
+        int(i["number"])
+        for i in raw_issues
+        if any(lb.get("name") == "status:in-progress" for lb in i.get("labels", []))
+    }
+
+    pr_items = tuple(
+        _format_pr_item(
+            pr,
+            _classify_pr(
+                pr,
+                issue_claimed=issue_claimed,
+                issue_to_prs=issue_to_prs,
+            ),
+        )
+        for pr in sorted(raw_prs, key=lambda p: int(p["number"]), reverse=True)
+    )
+    issue_items = tuple(
+        _format_issue_item(
+            issue,
+            _classify_issue(
+                issue,
+                linked_prs=issue_to_prs.get(int(issue["number"]), []),
+            ),
+        )
+        for issue in sorted(raw_issues, key=lambda i: int(i["number"]), reverse=True)
+    )
+
+    return QueueSnapshot(
+        project_id=project.id,
+        repo_label=f"{project.gitea_owner}/{project.repo_name}",
+        prs=pr_items,
+        issues=issue_items,
+        pr_pagination=pr_pagination,
+        issue_pagination=issue_pagination,
+    )
+
+
+def snapshot_to_dict(snapshot: QueueSnapshot) -> dict[str, Any]:
+    """JSON-serializable export for /api/queue."""
+
+    def _page(meta: PaginationMeta | None) -> dict[str, Any] | None:
+        if meta is None:
+            return None
+        return {
+            "page": meta.page,
+            "per_page": meta.per_page,
+            "returned_count": meta.returned_count,
+            "has_more": meta.has_more,
+            "is_final_page": meta.is_final_page,
+            "inventory_complete": meta.inventory_complete,
+            "pages_fetched": meta.pages_fetched,
+        }
+
+    def _item(item: QueueItem) -> dict[str, Any]:
+        return {
+            "number": item.number,
+            "title": item.title,
+            "badges": list(item.badges),
+            **item.extra,
+        }
+
+    return {
+        "project_id": snapshot.project_id,
+        "repo": snapshot.repo_label,
+        "fetch_error": snapshot.fetch_error,
+        "prs": [_item(p) for p in snapshot.prs],
+        "issues": [_item(i) for i in snapshot.issues],
+        "pagination": {
+            "prs": _page(snapshot.pr_pagination),
+            "issues": _page(snapshot.issue_pagination),
+        },
+    }

webui/queue_views.py

@@ -0,0 +1,119 @@
+"""HTML views for the live Gitea queue dashboard (#429)."""
+
+from __future__ import annotations
+
+import html
+
+from webui.queue_loader import PaginationMeta, QueueItem, QueueSnapshot
+
+
+def _badge_html(badges: tuple[str, ...]) -> str:
+    if not badges:
+        return ""
+    chips = "".join(
+        f'<span class="badge badge-{html.escape(b)}">{html.escape(b)}</span>'
+        for b in badges
+    )
+    return f'<span class="badges">{chips}</span>'
+
+
+def _pagination_html(label: str, meta: PaginationMeta | None) -> str:
+    if meta is None:
+        return (
+            f"<p class='muted'><strong>{html.escape(label)} pagination:</strong> "
+            "unavailable</p>"
+        )
+    status = "complete" if meta.inventory_complete else "partial"
+    more = "yes" if meta.has_more else "no"
+    return (
+        f"<p class='meta'><strong>{html.escape(label)} pagination ({status}):</strong> "
+        f"returned {meta.returned_count} · per_page {meta.per_page} · "
+        f"pages_fetched {meta.pages_fetched} · has_more {more} · "
+        f"final_page {'yes' if meta.is_final_page else 'no'}</p>"
+    )
+
+
+def _queue_table(
+    *,
+    title: str,
+    items: tuple[QueueItem, ...],
+    columns: tuple[tuple[str, str], ...],
+    fetch_failed: bool = False,
+) -> str:
+    if fetch_failed:
+        return (
+            f"<h3>{html.escape(title)}</h3>"
+            "<p class='muted'>Not loaded — queue fetch did not complete.</p>"
+        )
+    if not items:
+        return f"<h3>{html.escape(title)}</h3><p class='muted'>No open items.</p>"
+
+    headers = "".join(f"<th>{html.escape(label)}</th>" for _, label in columns)
+    rows = []
+    for item in items:
+        cells = []
+        for key, _ in columns:
+            if key == "number":
+                cells.append(f"<td>#{item.number}</td>")
+            elif key == "title":
+                cells.append(
+                    f"<td>{html.escape(item.title)}{_badge_html(item.badges)}</td>"
+                )
+            else:
+                cells.append(f"<td>{html.escape(item.extra.get(key, ''))}</td>")
+        rows.append("<tr>" + "".join(cells) + "</tr>")
+
+    body = (
+        f"<h3>{html.escape(title)}</h3>"
+        f"<table class='registry'><thead><tr>{headers}</tr></thead>"
+        f"<tbody>{''.join(rows)}</tbody></table>"
+    )
+    return body
+
+
+def render_queue_page(snapshot: QueueSnapshot) -> str:
+    error_block = ""
+    if snapshot.fetch_error:
+        error_block = (
+            f'<div class="stub"><p><strong>Queue unavailable:</strong> '
+            f"{html.escape(snapshot.fetch_error)}</p></div>"
+        )
+
+    fetch_failed = bool(snapshot.fetch_error)
+    pr_section = _queue_table(
+        title="Open pull requests",
+        items=snapshot.prs,
+        fetch_failed=fetch_failed,
+        columns=(
+            ("number", "#"),
+            ("title", "Title"),
+            ("branch", "Branch"),
+            ("head_sha", "Head"),
+            ("mergeable", "Mergeable"),
+            ("linked_issue", "Linked issue"),
+        ),
+    )
+    issue_section = _queue_table(
+        title="Open issues",
+        items=snapshot.issues,
+        fetch_failed=fetch_failed,
+        columns=(
+            ("number", "#"),
+            ("title", "Title"),
+            ("labels", "Labels"),
+            ("assignee", "Assignee"),
+            ("state", "State"),
+        ),
+    )
+
+    return (
+        "<h2>Live queue</h2>"
+        f"<p class='meta'>Repository: <code>{html.escape(snapshot.repo_label)}</code> "
+        f"· project <code>{html.escape(snapshot.project_id)}</code></p>"
+        f"{error_block}"
+        f"{_pagination_html('PR', snapshot.pr_pagination)}"
+        f"{pr_section}"
+        f"{_pagination_html('Issue', snapshot.issue_pagination)}"
+        f"{issue_section}"
+        "<p class='muted'>Read-only MVP — claims, reviews, and merges stay in Gitea/MCP tools.</p>"
+    )