docs: remediate stable control runtime ADR review findings (#615)

Address review 443 on PR #616: mandatory operator-guide/runbook cross-links,
LLM vs operator restart/relaunch split, and sanctioned post-merge parity
staleness response (stop, report, operator reload, re-verify). Add docs tests
enforcing F1–F3.

Refs: #615

tests/test_stable_control_runtime_policy_docs.py

@@ -0,0 +1,139 @@
+"""Documentation acceptance for the stable control runtime ADR (#615 / PR #616).
+
+Enforces review 443 remediation:
+
+* F1 — operator guide / runbooks cross-link the ADR (issue #615 AC2).
+* F2 — LLM sessions are not instructed to kill/restart/relaunch MCP; process
+  restart is operator-owned; ADR is the authoritative split.
+* F3 — routine post-merge master-parity staleness has a sanctioned response
+  (stop → report → operator reload → re-verify parity) and is not a full
+  promotion ledger requirement.
+"""
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+ADR = (
+    REPO_ROOT
+    / "docs"
+    / "architecture"
+    / "mcp-stable-control-runtime-policy-adr.md"
+)
+ADR_REL = "architecture/mcp-stable-control-runtime-policy-adr.md"
+ADR_BASENAME = "mcp-stable-control-runtime-policy-adr.md"
+
+CROSS_LINK_DOCS = (
+    REPO_ROOT / "docs" / "wiki" / "Operator-Guide.md",
+    REPO_ROOT / "docs" / "wiki" / "Runbooks.md",
+    REPO_ROOT / "docs" / "llm-workflow-runbooks.md",
+)
+
+
+def _read(path: Path) -> str:
+    assert path.is_file(), f"missing {path.relative_to(REPO_ROOT)}"
+    return path.read_text(encoding="utf-8")
+
+
+def test_adr_exists_with_policy_core():
+    text = _read(ADR)
+    assert text.lstrip().startswith("#"), "ADR lacks a title"
+    assert "#615" in text
+    assert "stable control runtime" in text.lower()
+    assert "2.3" in text and "2.4" in text and "2.5" in text and "2.6" in text
+
+
+def test_f1_operator_docs_cross_link_adr():
+    for path in CROSS_LINK_DOCS:
+        text = _read(path)
+        assert ADR_BASENAME in text, (
+            f"{path.relative_to(REPO_ROOT)} must cross-link {ADR_BASENAME} "
+            f"(issue #615 acceptance criterion 2)"
+        )
+
+
+def test_f1_adr_lists_cross_links_as_acceptance_not_optional_tooling():
+    text = _read(ADR)
+    # Acceptance section must require guide/runbook cross-links.
+    assert "Operator guide / runbooks cross-link" in text or (
+        "operator guide" in text.lower() and "cross-link" in text.lower()
+        and "Acceptance" in text
+    )
+    # Cross-link must not remain only as optional tooling item #4.
+    optional = text.split("## 5. Implementation follow-ups", 1)[-1].split(
+        "## 6. Acceptance", 1
+    )[0]
+    assert "Operator Guide wiki cross-link to this ADR" not in optional, (
+        "ADR §5 must not list operator-guide cross-link as optional tooling"
+    )
+    assert "Not optional" in text or "must** cross-link" in text.lower() or (
+        "must cross-link" in text.lower()
+    )
+
+
+def test_f2_runbook_fallback_is_operator_owned_not_llm_restart():
+    runbooks = _read(REPO_ROOT / "docs" / "llm-workflow-runbooks.md")
+    # Forbidden historical self-service instruction.
+    forbidden = (
+        "the LLM must relaunch or restart the client/MCP with the correct "
+        "profile environment variable before claiming or working on any tasks"
+    )
+    assert forbidden not in runbooks, (
+        "llm-workflow-runbooks must not instruct the LLM to relaunch/restart MCP"
+    )
+    assert "operator-owned" in runbooks.lower() or "Operator-owned" in runbooks
+    assert ADR_BASENAME in runbooks
+
+
+def test_f2_workspace_rebind_does_not_require_llm_process_relaunch():
+    runbooks = _read(REPO_ROOT / "docs" / "llm-workflow-runbooks.md")
+    section = runbooks.split("### Safe reconnect / rebind procedure", 1)[-1]
+    section = section.split("## Safety notes", 1)[0]
+    # Must not tell the LLM alone to relaunch the MCP process as step 2.
+    assert "Reconnect or relaunch the correct namespace MCP server from the intended" not in section
+    assert "Operator-owned" in section or "operator" in section.lower()
+    assert "worktree_path" in section
+    collapsed = " ".join(section.lower().split())
+    assert "client reconnect" in collapsed
+
+
+def test_f2_adr_forbids_llm_restart_and_supersedes_self_service_relaunch():
+    text = _read(ADR)
+    lower = text.lower()
+    assert "must not" in lower and "restart" in lower
+    assert "operator" in lower and "reload" in lower
+    assert "supersedes" in lower
+    assert "llm" in lower
+
+
+def test_f3_adr_defines_post_merge_parity_staleness_response():
+    text = _read(ADR)
+    lower = text.lower()
+    assert "2.6" in text
+    assert "post-merge" in lower or "post merge" in lower
+    assert "parity" in lower and "stale" in lower
+    # Sanctioned steps: stop, report, operator reload, re-verify.
+    assert "stop" in lower
+    assert "report" in lower
+    assert "operator" in lower
+    assert "parity is verified" in lower or "re-verif" in lower or (
+        "startup/current-head" in lower
+    )
+    # Not a full promotion ledger for routine reload.
+    assert "not a §2.4 promotion" in lower or "not a section 2.4 promotion" in lower or (
+        "not a §2.4" in text or "Not a §2.4 promotion" in text
+    )
+    # Stale parity listed among unhealthy triggers.
+    assert "master parity is stale" in lower or "stale master parity" in lower
+
+
+def test_f3_adr_forbids_llm_bypass_of_parity_gate():
+    text = _read(ADR)
+    lower = text.lower()
+    assert "bypass" in lower or "self-reset" in lower or "self-service" in lower
+    assert "parity" in lower
+
+
+def test_cross_links_do_not_embed_secrets_or_raw_hosts_in_wiki_snippets():
+    for path in CROSS_LINK_DOCS:
+        text = _read(path)
+        for marker in ("ghp_", "BEGIN PRIVATE KEY", "Authorization: Bearer"):
+            assert marker not in text, f"{path} contains {marker!r}"