From 25622aa748987ff12adce10ebb38c1eadc59c7c9 Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:58:40 +0800
Subject: [PATCH 01/14] make-pr: preflight runs the PR-body validator on
 --body-file

description_check only read the description's prose for claims about the
repo's past, so preflight printed "ok preflight passed" for a body the
required PR Body check then rejected after publication (#780-#789, #793,
#795). describe() now also runs
engine/skills/draft-pr/scripts/validate-pr-body.mjs on the same file and
prints its errors under the gate line.

Exit 1 from the validator fails preflight. No node, a missing validator,
a timeout, or any other exit code prints "description unchecked: ..." and
fails too -- a check that could not run is not a pass.

The #795 description lands as a fixture: it exits 1 with Test Plan and
Revert Plan outside <details> and code names in the Summary, and the new
tests show preflight failing on it and still passing a valid body.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 engine/skills/make-pr/scripts/preflight.py    |  39 ++++-
 .../tests/fixtures/pr795-failing-body.md      |  54 ++++++
 .../make-pr/tests/test_description_check.py   |   6 +
 engine/skills/make-pr/tests/test_preflight.py | 165 ++++++++++++++++++
 4 files changed, 263 insertions(+), 1 deletion(-)
 create mode 100644 engine/skills/make-pr/tests/fixtures/pr795-failing-body.md

diff --git a/engine/skills/make-pr/scripts/preflight.py b/engine/skills/make-pr/scripts/preflight.py
index 36024a5e..e3c23704 100644
--- a/engine/skills/make-pr/scripts/preflight.py
+++ b/engine/skills/make-pr/scripts/preflight.py
@@ -39,6 +39,9 @@
 
 DEFAULT_CONFIG = os.path.join(REPO_ROOT, "drafter.config.json")
 UNCHECKED_EXIT = 3
+VALIDATOR = "engine/skills/draft-pr/scripts/validate-pr-body.mjs"
+VALIDATOR_NAME = os.path.basename(VALIDATOR)
+VALIDATOR_TIMEOUT = 120
 
 
 class UnitRulesUnreadable(Exception):
@@ -222,6 +225,34 @@ def changed_paths(base: str, repo: str = REPO_ROOT) -> list[str]:
     return sorted({p for p in (out + untracked).splitlines() if p.strip()})
 
 
+def validate_body(body_file: str, run=None, which=None) -> tuple[int, list[str]]:
+    """Run the PR-body schema validator that the required PR Body check runs.
+
+    description_check only reads the prose for history claims, so a body whose
+    Test Plan is not inside a <details> block passed preflight and then failed
+    the required check after publication (PRs #780-#789, #793, #795). Exit 1
+    from the validator is a real rejection; anything else -- no node, a
+    timeout, an unexpected exit code -- is unchecked, which also fails.
+    """
+    run = run if run is not None else subprocess.run
+    which = which if which is not None else shutil.which
+    if not which("node"):
+        return 1, [f"description unchecked: node is not on PATH, so {VALIDATOR_NAME} did not run"]
+    if not os.path.isfile(os.path.join(REPO_ROOT, VALIDATOR)):
+        return 1, [f"description unchecked: no {VALIDATOR} under {REPO_ROOT}"]
+    cmd = ["node", VALIDATOR, "--body-file", os.path.abspath(body_file)]
+    try:
+        res = run(cmd, cwd=REPO_ROOT, capture_output=True, text=True, timeout=VALIDATOR_TIMEOUT)
+    except subprocess.TimeoutExpired:
+        return 1, [f"description unchecked: {VALIDATOR_NAME} did not finish in {VALIDATOR_TIMEOUT}s"]
+    except OSError as exc:
+        return 1, [f"description unchecked: cannot run {VALIDATOR_NAME}: {exc}"]
+    lines = (res.stdout + res.stderr).strip().splitlines()
+    if res.returncode in (0, 1):
+        return res.returncode, lines
+    return 1, lines + [f"description unchecked: {VALIDATOR_NAME} exited {res.returncode}"]
+
+
 def describe(body_file: str | None) -> int:
     if not body_file:
         print("fail    description unchecked: pass --body-file with the PR description")
@@ -239,7 +270,13 @@ def describe(body_file: str | None) -> int:
     for line in lines:
         print("        " + line)
     print(f"        description {outcome}")
-    return 0 if outcome == "clean" else 1
+    status = 0 if outcome == "clean" else 1
+
+    print(f"gate    node {VALIDATOR} --body-file " + body_file)
+    schema_status, schema_lines = validate_body(body_file)
+    for line in schema_lines:
+        print("        " + line)
+    return status or schema_status
 
 
 def main(argv: list[str] | None = None) -> int:
diff --git a/engine/skills/make-pr/tests/fixtures/pr795-failing-body.md b/engine/skills/make-pr/tests/fixtures/pr795-failing-body.md
new file mode 100644
index 00000000..f97a5d9e
--- /dev/null
+++ b/engine/skills/make-pr/tests/fixtures/pr795-failing-body.md
@@ -0,0 +1,54 @@
+## Summary
+
+We run the same tools on seven machines. Keeping them all on the same version used to mean updating each one by hand.
+
+Now `scripts/update_fleet.sh` does it. It reads `remoteTargets` from `~/.invoker/config.json`, updates every machine, then prints one line per machine saying whether it worked.
+
+A machine it could not reach shows as failed, never as fine. A `--dry-run` changes nothing.
+
+## Review Claim
+
+The update script reports every machine it was asked about, and a machine it could not check shows as failed, not as fine.
+
+## Review Lane
+
+behavior
+
+## Review Unit
+
+corpus-lesson
+
+## Safety Invariant
+
+The script changes nothing on a `--dry-run`, and replacing the live app on that machine happens only behind an explicit flag. Release assets are checksum-verified before anything is installed.
+
+## Slice Rationale
+
+One claim, one review unit: the cat-mode skill package plus its colocated tests. The two mined rules are prose in the same skill; they ship no code and cannot be reviewed apart from the file they live in.
+
+## Non-goals
+
+- No Invoker-side change: the script consumes published release assets as they are.
+- No scheduler or worker. Running it is still a person's decision.
+
+## Test Plan
+
+```
+$ python3 -m unittest tests.test_cat_mode
+Ran 92 tests in 0.113s
+OK
+```
+
+Gates:
+
+```
+$ python3 scripts/ci/check_skill_file_refs.py    -> exit=0  ok      skill file refs
+$ python3 scripts/ci/check_codify_has_code.py    -> exit=0  ok      codify-has-code
+```
+
+## Revert Plan
+
+- Safe to revert? Yes
+- Revert command: `git revert <sha>`
+- Post-revert steps: None. No installed hook, skill, or machine reads the script.
+- Data migration? No
diff --git a/engine/skills/make-pr/tests/test_description_check.py b/engine/skills/make-pr/tests/test_description_check.py
index c0bbc8ae..60286071 100644
--- a/engine/skills/make-pr/tests/test_description_check.py
+++ b/engine/skills/make-pr/tests/test_description_check.py
@@ -95,8 +95,13 @@ def test_unreadable_body_file_fails_as_unchecked(self):
         self.assertIn("cannot read", out.getvalue())
 
     def test_clean_body_file_passes(self):
+        """BODY is a stub, not a schema-valid description, so describe()'s other
+        step -- the PR-body schema validator -- stands in as passing here. Its
+        own cases live in test_preflight.TestDescriptionSchemaValidator."""
         original = description_check.check
+        original_validate = preflight.validate_body
         description_check.check = lambda body: ("clean", [])
+        preflight.validate_body = lambda body_file: (0, ["PR body validation passed."])
         try:
             with tempfile.NamedTemporaryFile("w", suffix=".md", delete=False) as handle:
                 handle.write(BODY)
@@ -105,6 +110,7 @@ def test_clean_body_file_passes(self):
                 status = preflight.describe(handle.name)
         finally:
             description_check.check = original
+            preflight.validate_body = original_validate
             os.unlink(handle.name)
         self.assertEqual(status, 0)
         self.assertIn("description clean", out.getvalue())
diff --git a/engine/skills/make-pr/tests/test_preflight.py b/engine/skills/make-pr/tests/test_preflight.py
index 22fa2d14..7744a9c0 100644
--- a/engine/skills/make-pr/tests/test_preflight.py
+++ b/engine/skills/make-pr/tests/test_preflight.py
@@ -3,12 +3,15 @@
 sets of PRs in this repo (e.g. #89 visual-proof, the 2026-09-01 hook slices)."""
 from __future__ import annotations
 
+import contextlib
+import io
 import json
 import os
 import shutil
 import subprocess
 import sys
 import tempfile
+import types
 import unittest
 
 HERE = os.path.dirname(os.path.abspath(__file__))
@@ -16,6 +19,7 @@
 import preflight as pf  # noqa: E402
 
 SCRIPT = os.path.join(os.path.dirname(HERE), "scripts", "preflight.py")
+PR795_BODY = os.path.join(HERE, "fixtures", "pr795-failing-body.md")
 
 # real: PR #89 "Require actual captures for visual proof"
 PR89 = ["product/skills/visual-proof/SKILL.md", "product/skills/visual-proof/tests/fires_example.md"]
@@ -295,5 +299,166 @@ def test_no_paths_exits_2(self):
         self.assertEqual(res.returncode, 2)
 
 
+VALID_BODY = """## Summary
+
+We run the same tools on seven machines. Keeping them all on the same version used to mean updating each one by hand.
+
+Now one script does it. It updates every machine, then prints one line per machine saying whether it worked.
+
+A machine it could not reach shows as failed, never as fine. A practice run changes nothing.
+
+## Review Claim
+
+The update script reports every machine it was asked about, and a machine it could not check shows as failed, not as fine.
+
+## Review Lane
+
+behavior
+
+## Review Unit
+
+corpus-lesson
+
+## Safety Invariant
+
+The script changes nothing on a practice run, and replacing the live app on a machine happens only behind an explicit flag.
+
+## Slice Rationale
+
+One claim, one review unit: the cat-mode skill package plus its colocated tests.
+
+## Non-goals
+
+- No Invoker-side change: the script consumes published release assets as they are.
+
+## Test Plan
+
+<details>
+<summary>Test Plan</summary>
+
+```
+$ python3 -m unittest tests.test_cat_mode
+Ran 92 tests in 0.113s
+OK
+```
+
+</details>
+
+## Revert Plan
+
+<details>
+<summary>Revert Plan</summary>
+
+- Safe to revert? Yes
+- Revert command: `git revert <sha>`
+- Post-revert steps: None.
+- Data migration? No
+
+</details>
+"""
+
+
+@contextlib.contextmanager
+def clean_history_judge():
+    """Stand in for description_check so these tests exercise the schema
+    validator alone. The real checker asks a background LLM judge."""
+    stub = types.ModuleType("description_check")
+    stub.check = lambda body: ("clean", [])
+    real = sys.modules.get("description_check")
+    sys.modules["description_check"] = stub
+    try:
+        yield
+    finally:
+        if real is None:
+            sys.modules.pop("description_check", None)
+        else:
+            sys.modules["description_check"] = real
+
+
+def run_preflight(body_file):
+    """main() on a neutral path, so the exit status is the description's."""
+    real = pf.changed_paths
+    pf.changed_paths = lambda base, repo=pf.REPO_ROOT: ["docs/ecosystem.md"]
+    buf = io.StringIO()
+    try:
+        with clean_history_judge(), contextlib.redirect_stdout(buf):
+            status = pf.main(["--body-file", body_file])
+    finally:
+        pf.changed_paths = real
+    return status, buf.getvalue()
+
+
+class TestDescriptionSchemaValidator(unittest.TestCase):
+    """preflight's description step must run the same validator as the
+    required PR Body check. description_check only reads the prose for claims
+    about the repo's past, so a body whose Test Plan sits outside a <details>
+    block got `ok preflight passed` and was then rejected after publication."""
+
+    def test_the_pr795_body_is_rejected_with_the_validators_own_errors(self):
+        status, lines = pf.validate_body(PR795_BODY)
+        report = "\n".join(lines)
+        self.assertEqual(status, 1, report)
+        self.assertIn("## Test Plan must wrap its content in a collapsed <details> block", report)
+        self.assertIn("## Revert Plan must wrap its content in a collapsed <details> block", report)
+        self.assertIn("must not use code names", report)
+
+    def test_preflight_fails_on_the_pr795_body_and_prints_the_errors(self):
+        status, out = run_preflight(PR795_BODY)
+        self.assertEqual(status, 1, out)
+        self.assertIn("## Test Plan must wrap its content in a collapsed <details> block", out)
+        self.assertNotIn("ok      preflight passed", out)
+        self.assertIn("fail    preflight", out)
+
+    def test_a_body_the_validator_accepts_still_passes(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            body_file = os.path.join(tmp, "body.md")
+            with open(body_file, "w", encoding="utf-8") as handle:
+                handle.write(VALID_BODY)
+            status, out = run_preflight(body_file)
+        self.assertEqual(status, 0, out)
+        self.assertIn("PR body validation passed.", out)
+        self.assertIn("ok      preflight passed", out)
+
+    def test_a_missing_node_is_unchecked_not_a_pass(self):
+        status, lines = pf.validate_body(PR795_BODY, which=lambda name: None)
+        self.assertEqual(status, 1, lines)
+        self.assertIn("description unchecked", "\n".join(lines))
+        self.assertIn("node is not on PATH", "\n".join(lines))
+
+    def test_a_validator_that_is_not_in_the_checkout_is_unchecked_not_a_pass(self):
+        real = pf.VALIDATOR
+        pf.VALIDATOR = "engine/skills/draft-pr/scripts/no-such-validator.mjs"
+        try:
+            status, lines = pf.validate_body(PR795_BODY)
+        finally:
+            pf.VALIDATOR = real
+        self.assertEqual(status, 1, lines)
+        self.assertIn("description unchecked", "\n".join(lines))
+
+    def test_a_timeout_is_unchecked_not_a_pass(self):
+        def times_out(*args, **kwargs):
+            raise subprocess.TimeoutExpired(cmd="node", timeout=pf.VALIDATOR_TIMEOUT)
+
+        status, lines = pf.validate_body(PR795_BODY, run=times_out, which=lambda name: "/usr/bin/node")
+        self.assertEqual(status, 1, lines)
+        self.assertIn("description unchecked", "\n".join(lines))
+
+    def test_an_unexpected_exit_code_is_unchecked_not_a_pass(self):
+        def crashes(*args, **kwargs):
+            return subprocess.CompletedProcess(args, 7, stdout="", stderr="node: bad option")
+
+        status, lines = pf.validate_body(PR795_BODY, run=crashes, which=lambda name: "/usr/bin/node")
+        self.assertEqual(status, 1, lines)
+        self.assertIn("exited 7", "\n".join(lines))
+
+    def test_a_node_that_cannot_be_spawned_is_unchecked_not_a_pass(self):
+        def refuses(*args, **kwargs):
+            raise OSError("Exec format error")
+
+        status, lines = pf.validate_body(PR795_BODY, run=refuses, which=lambda name: "/usr/bin/node")
+        self.assertEqual(status, 1, lines)
+        self.assertIn("description unchecked", "\n".join(lines))
+
+
 if __name__ == "__main__":
     unittest.main()

From aeb2d1c931330fb5ec1b2bf1579e69e6a6d964af Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:58:53 +0800
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Exit code: 0

From e89618223402b2c1497635bfe6cd884299d7a7cc Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:59:12 +0800
Subject: [PATCH 03/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-1=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20-m=20unittest=20discover=20-s=20engine/skills/make-pr/tests?=
 =?UTF-8?q?=20-v`=20passes=20on=20the=20finished=20branch.=20Review=20lane?=
 =?UTF-8?q?:=20proof=20Safety=20invariant:=20Verification=20is=20read-only?=
 =?UTF-8?q?=20and=20alters=20no=20repository=20file.=20Effectiveness=20mea?=
 =?UTF-8?q?surement:=20The=20command's=20exit=20code=20is=20the=20direct?=
 =?UTF-8?q?=20measurement.=20Slice=20rationale:=20One=20check=20per=20proo?=
 =?UTF-8?q?f=20task.=20Architectural=20effect:=20None;=20verification=20on?=
 =?UTF-8?q?ly.=20Goal:=20Prove=20the=20slice.=20Motivation:=20Running=20th?=
 =?UTF-8?q?e=20check=20is=20the=20proof.=20Alternative=20considerations:?=
 =?UTF-8?q?=20The=20full=20suite=20was=20not=20required=20because=20the=20?=
 =?UTF-8?q?slice=20touches=20one=20component=20with=20its=20own=20tests.?=
 =?UTF-8?q?=20Implementation=20details:=20Run=20`python3=20-m=20unittest?=
 =?UTF-8?q?=20discover=20-s=20engine/skills/make-pr/tests=20-v`.=20Non-goa?=
 =?UTF-8?q?ls:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature=20s?=
 =?UTF-8?q?tate:=20active=20Layer=20exception:=20allowed.=20Verification?=
 =?UTF-8?q?=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20co?=
 =?UTF-8?q?mmit=20so=20they=20check=20the=20final=20branch=20the=20PR=20wi?=
 =?UTF-8?q?ll=20carry.=20Acceptance=20criteria:=20-=20The=20command=20exit?=
 =?UTF-8?q?s=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From fe1887b3effe7d00d47acbd00ae378a62893680f Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:59:13 +0800
Subject: [PATCH 04/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-4=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fno=5Fnew=5Fcomments.py`=20passes=20on=20the?=
 =?UTF-8?q?=20finished=20branch.=20Review=20lane:=20proof=20Safety=20invar?=
 =?UTF-8?q?iant:=20Verification=20is=20read-only=20and=20alters=20no=20rep?=
 =?UTF-8?q?ository=20file.=20Effectiveness=20measurement:=20The=20command'?=
 =?UTF-8?q?s=20exit=20code=20is=20the=20direct=20measurement.=20Slice=20ra?=
 =?UTF-8?q?tionale:=20One=20check=20per=20proof=20task.=20Architectural=20?=
 =?UTF-8?q?effect:=20None;=20verification=20only.=20Goal:=20Prove=20the=20?=
 =?UTF-8?q?slice.=20Motivation:=20Running=20the=20check=20is=20the=20proof?=
 =?UTF-8?q?.=20Alternative=20considerations:=20The=20full=20suite=20was=20?=
 =?UTF-8?q?not=20required=20because=20the=20slice=20touches=20one=20compon?=
 =?UTF-8?q?ent=20with=20its=20own=20tests.=20Implementation=20details:=20R?=
 =?UTF-8?q?un=20`python3=20scripts/check=5Fno=5Fnew=5Fcomments.py`.=20Non-?=
 =?UTF-8?q?goals:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature?=
 =?UTF-8?q?=20state:=20active=20Layer=20exception:=20allowed.=20Verificati?=
 =?UTF-8?q?on=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20?=
 =?UTF-8?q?commit=20so=20they=20check=20the=20final=20branch=20the=20PR=20?=
 =?UTF-8?q?will=20carry.=20Acceptance=20criteria:=20-=20The=20command=20ex?=
 =?UTF-8?q?its=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 1

From 394d32186d7f4efea35f3c7aae3abc98b7a4aef6 Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:59:28 +0800
Subject: [PATCH 05/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-2=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fskill=5Ftest=5Fcoverage.py=20--base=20origin?=
 =?UTF-8?q?/main=20--head=20HEAD`=20passes=20on=20the=20finished=20branch.?=
 =?UTF-8?q?=20Review=20lane:=20proof=20Safety=20invariant:=20Verification?=
 =?UTF-8?q?=20is=20read-only=20and=20alters=20no=20repository=20file.=20Ef?=
 =?UTF-8?q?fectiveness=20measurement:=20The=20command's=20exit=20code=20is?=
 =?UTF-8?q?=20the=20direct=20measurement.=20Slice=20rationale:=20One=20che?=
 =?UTF-8?q?ck=20per=20proof=20task.=20Architectural=20effect:=20None;=20ve?=
 =?UTF-8?q?rification=20only.=20Goal:=20Prove=20the=20slice.=20Motivation:?=
 =?UTF-8?q?=20Running=20the=20check=20is=20the=20proof.=20Alternative=20co?=
 =?UTF-8?q?nsiderations:=20The=20full=20suite=20was=20not=20required=20bec?=
 =?UTF-8?q?ause=20the=20slice=20touches=20one=20component=20with=20its=20o?=
 =?UTF-8?q?wn=20tests.=20Implementation=20details:=20Run=20`python3=20scri?=
 =?UTF-8?q?pts/check=5Fskill=5Ftest=5Fcoverage.py=20--base=20origin/main?=
 =?UTF-8?q?=20--head=20HEAD`.=20Non-goals:=20No=20mutations.=20Layer:=20ap?=
 =?UTF-8?q?p=5Fregression=20Feature=20state:=20active=20Layer=20exception:?=
 =?UTF-8?q?=20allowed.=20Verification=20and=20the=20terminal=20scrub=20run?=
 =?UTF-8?q?=20after=20the=20docs=20commit=20so=20they=20check=20the=20fina?=
 =?UTF-8?q?l=20branch=20the=20PR=20will=20carry.=20Acceptance=20criteria:?=
 =?UTF-8?q?=20-=20The=20command=20exits=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From 5950111b5bcc17cdad2ddff472ed8ec0f8f5f494 Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:59:31 +0800
Subject: [PATCH 06/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-3=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fskill=5Ffile=5Frefs.py`=20passes=20on=20the?=
 =?UTF-8?q?=20finished=20branch.=20Review=20lane:=20proof=20Safety=20invar?=
 =?UTF-8?q?iant:=20Verification=20is=20read-only=20and=20alters=20no=20rep?=
 =?UTF-8?q?ository=20file.=20Effectiveness=20measurement:=20The=20command'?=
 =?UTF-8?q?s=20exit=20code=20is=20the=20direct=20measurement.=20Slice=20ra?=
 =?UTF-8?q?tionale:=20One=20check=20per=20proof=20task.=20Architectural=20?=
 =?UTF-8?q?effect:=20None;=20verification=20only.=20Goal:=20Prove=20the=20?=
 =?UTF-8?q?slice.=20Motivation:=20Running=20the=20check=20is=20the=20proof?=
 =?UTF-8?q?.=20Alternative=20considerations:=20The=20full=20suite=20was=20?=
 =?UTF-8?q?not=20required=20because=20the=20slice=20touches=20one=20compon?=
 =?UTF-8?q?ent=20with=20its=20own=20tests.=20Implementation=20details:=20R?=
 =?UTF-8?q?un=20`python3=20scripts/check=5Fskill=5Ffile=5Frefs.py`.=20Non-?=
 =?UTF-8?q?goals:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature?=
 =?UTF-8?q?=20state:=20active=20Layer=20exception:=20allowed.=20Verificati?=
 =?UTF-8?q?on=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20?=
 =?UTF-8?q?commit=20so=20they=20check=20the=20final=20branch=20the=20PR=20?=
 =?UTF-8?q?will=20carry.=20Acceptance=20criteria:=20-=20The=20command=20ex?=
 =?UTF-8?q?its=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From e59f975f1c96f06b16439853b22beee3a5c974f0 Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 00:59:40 +0800
Subject: [PATCH 07/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-4=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fno=5Fnew=5Fcomments.py`=20passes=20on=20the?=
 =?UTF-8?q?=20finished=20branch.=20Review=20lane:=20proof=20Safety=20invar?=
 =?UTF-8?q?iant:=20Verification=20is=20read-only=20and=20alters=20no=20rep?=
 =?UTF-8?q?ository=20file.=20Effectiveness=20measurement:=20The=20command'?=
 =?UTF-8?q?s=20exit=20code=20is=20the=20direct=20measurement.=20Slice=20ra?=
 =?UTF-8?q?tionale:=20One=20check=20per=20proof=20task.=20Architectural=20?=
 =?UTF-8?q?effect:=20None;=20verification=20only.=20Goal:=20Prove=20the=20?=
 =?UTF-8?q?slice.=20Motivation:=20Running=20the=20check=20is=20the=20proof?=
 =?UTF-8?q?.=20Alternative=20considerations:=20The=20full=20suite=20was=20?=
 =?UTF-8?q?not=20required=20because=20the=20slice=20touches=20one=20compon?=
 =?UTF-8?q?ent=20with=20its=20own=20tests.=20Implementation=20details:=20R?=
 =?UTF-8?q?un=20`python3=20scripts/check=5Fno=5Fnew=5Fcomments.py`.=20Non-?=
 =?UTF-8?q?goals:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature?=
 =?UTF-8?q?=20state:=20active=20Layer=20exception:=20allowed.=20Verificati?=
 =?UTF-8?q?on=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20?=
 =?UTF-8?q?commit=20so=20they=20check=20the=20final=20branch=20the=20PR=20?=
 =?UTF-8?q?will=20carry.=20Acceptance=20criteria:=20-=20The=20command=20ex?=
 =?UTF-8?q?its=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 1

From 0c52061d7f2ecd8a37fbac3e3baf0e393472e6a5 Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 01:01:07 +0800
Subject: [PATCH 08/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-4=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fno=5Fnew=5Fcomments.py`=20passes=20on=20the?=
 =?UTF-8?q?=20finished=20branch.=20Review=20lane:=20proof=20Safety=20invar?=
 =?UTF-8?q?iant:=20Verification=20is=20read-only=20and=20alters=20no=20rep?=
 =?UTF-8?q?ository=20file.=20Effectiveness=20measurement:=20The=20command'?=
 =?UTF-8?q?s=20exit=20code=20is=20the=20direct=20measurement.=20Slice=20ra?=
 =?UTF-8?q?tionale:=20One=20check=20per=20proof=20task.=20Architectural=20?=
 =?UTF-8?q?effect:=20None;=20verification=20only.=20Goal:=20Prove=20the=20?=
 =?UTF-8?q?slice.=20Motivation:=20Running=20the=20check=20is=20the=20proof?=
 =?UTF-8?q?.=20Alternative=20considerations:=20The=20full=20suite=20was=20?=
 =?UTF-8?q?not=20required=20because=20the=20slice=20touches=20one=20compon?=
 =?UTF-8?q?ent=20with=20its=20own=20tests.=20Implementation=20details:=20R?=
 =?UTF-8?q?un=20`python3=20scripts/check=5Fno=5Fnew=5Fcomments.py`.=20Non-?=
 =?UTF-8?q?goals:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature?=
 =?UTF-8?q?=20state:=20active=20Layer=20exception:=20allowed.=20Verificati?=
 =?UTF-8?q?on=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20?=
 =?UTF-8?q?commit=20so=20they=20check=20the=20final=20branch=20the=20PR=20?=
 =?UTF-8?q?will=20carry.=20Acceptance=20criteria:=20-=20The=20command=20ex?=
 =?UTF-8?q?its=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Solution:
  Review claim: `python3 scripts/check_no_new_comments.py` passes on the finished branch.
Review lane: proof
Safety invariant: Verification is read-only and alters no repository file.
Effectiveness measurement: The command's exit code is the direct measurement.
Slice rationale: One check per proof task.
Architectural effect: None; verification only.
Goal: Prove the slice.
Motivation: Running the check is the proof.
Alternative considerations: The full suite was not required because the slice touches one component with its own tests.
Implementation details: Run `python3 scripts/check_no_new_comments.py`.
Non-goals: No mutations.
Layer: app_regression
Feature state: active
Layer exception: allowed. Verification and the terminal scrub run after the docs commit so they check the final branch the PR will carry.
Acceptance criteria:
- The command exits 0.
---
 scripts/ci/check_no_new_comments.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/ci/check_no_new_comments.py b/scripts/ci/check_no_new_comments.py
index 97210b61..010231f9 100644
--- a/scripts/ci/check_no_new_comments.py
+++ b/scripts/ci/check_no_new_comments.py
@@ -16,7 +16,7 @@
 import subprocess
 import sys
 
-SCRIPTS_DIR = os.path.dirname(os.path.abspath(__file__))
+SCRIPTS_DIR = os.path.dirname(os.path.realpath(__file__))
 REPO_ROOT = os.path.dirname(os.path.dirname(SCRIPTS_DIR))
 sys.path.insert(0, os.path.join(REPO_ROOT, "engine", "hooks", "no-comments"))
 sys.path.insert(0, SCRIPTS_DIR)

From 54e76b3fe572e414b2a511e31d2e5c2daec5222f Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 01:01:13 +0800
Subject: [PATCH 09/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/verify-pref?=
 =?UTF-8?q?light-runs-validator-4=20=E2=80=94=20Review=20claim:=20`python3?=
 =?UTF-8?q?=20scripts/check=5Fno=5Fnew=5Fcomments.py`=20passes=20on=20the?=
 =?UTF-8?q?=20finished=20branch.=20Review=20lane:=20proof=20Safety=20invar?=
 =?UTF-8?q?iant:=20Verification=20is=20read-only=20and=20alters=20no=20rep?=
 =?UTF-8?q?ository=20file.=20Effectiveness=20measurement:=20The=20command'?=
 =?UTF-8?q?s=20exit=20code=20is=20the=20direct=20measurement.=20Slice=20ra?=
 =?UTF-8?q?tionale:=20One=20check=20per=20proof=20task.=20Architectural=20?=
 =?UTF-8?q?effect:=20None;=20verification=20only.=20Goal:=20Prove=20the=20?=
 =?UTF-8?q?slice.=20Motivation:=20Running=20the=20check=20is=20the=20proof?=
 =?UTF-8?q?.=20Alternative=20considerations:=20The=20full=20suite=20was=20?=
 =?UTF-8?q?not=20required=20because=20the=20slice=20touches=20one=20compon?=
 =?UTF-8?q?ent=20with=20its=20own=20tests.=20Implementation=20details:=20R?=
 =?UTF-8?q?un=20`python3=20scripts/check=5Fno=5Fnew=5Fcomments.py`.=20Non-?=
 =?UTF-8?q?goals:=20No=20mutations.=20Layer:=20app=5Fregression=20Feature?=
 =?UTF-8?q?=20state:=20active=20Layer=20exception:=20allowed.=20Verificati?=
 =?UTF-8?q?on=20and=20the=20terminal=20scrub=20run=20after=20the=20docs=20?=
 =?UTF-8?q?commit=20so=20they=20check=20the=20final=20branch=20the=20PR=20?=
 =?UTF-8?q?will=20carry.=20Acceptance=20criteria:=20-=20The=20command=20ex?=
 =?UTF-8?q?its=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From cc4dd390202022a891ca379285c8ffff8cda7f5e Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 01:02:02 +0800
Subject: [PATCH 10/14] =?UTF-8?q?invoker:=20wf-1790182452439-6/scrub-hando?=
 =?UTF-8?q?ff-artifacts=20=E2=80=94=20Review=20claim:=20No=20ephemeral=20i?=
 =?UTF-8?q?nter-task=20handoff=20files=20remain=20in=20the=20worktree=20be?=
 =?UTF-8?q?fore=20the=20merge=20gate.=20Review=20lane:=20cleanup=20Safety?=
 =?UTF-8?q?=20invariant:=20The=20scrub=20script=20only=20checks=20for=20kn?=
 =?UTF-8?q?own=20handoff=20artifact=20names=20and=20never=20touches=20sour?=
 =?UTF-8?q?ce,=20tests,=20or=20other=20repository=20files.=20Effectiveness?=
 =?UTF-8?q?=20measurement:=20The=20script=20exits=20non-zero=20if=20any=20?=
 =?UTF-8?q?handoff=20artifact=20remains.=20Slice=20rationale:=20Required?=
 =?UTF-8?q?=20terminal=20scrub=20for=20every=20implementation=20workflow.?=
 =?UTF-8?q?=20Architectural=20effect:=20None;=20hygiene=20only.=20Goal:=20?=
 =?UTF-8?q?Leave=20the=20branch=20free=20of=20handoff=20artifacts.=20Motiv?=
 =?UTF-8?q?ation:=20Handoff=20files=20must=20not=20reach=20the=20PR.=20Alt?=
 =?UTF-8?q?ernative=20considerations:=20Manual=20cleanup=20was=20set=20asi?=
 =?UTF-8?q?de=20as=20non-deterministic.=20Implementation=20details:=20Run?=
 =?UTF-8?q?=20scripts/scrub-handoff-artifacts.sh.=20Non-goals:=20No=20prod?=
 =?UTF-8?q?uct=20edits.=20Layer:=20app=5Fregression=20Feature=20state:=20a?=
 =?UTF-8?q?ctive=20Layer=20exception:=20allowed.=20Verification=20and=20th?=
 =?UTF-8?q?e=20terminal=20scrub=20run=20after=20the=20docs=20commit=20so?=
 =?UTF-8?q?=20they=20check=20the=20final=20branch=20the=20PR=20will=20carr?=
 =?UTF-8?q?y.=20Acceptance=20criteria:=20-=20The=20command=20exits=200.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From 9bb7258ce3d220c8526ff009beeca94d059dfd2d Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Thu, 24 Sep 2026 10:52:21 +0800
Subject: [PATCH 11/14] cat-mode: many PR stacks run as one parallel unit per
 stack, never serially

route_execution(units=N) never returns local for N>1 publishing units:
Invoker first, else one worktree subagent per unit (also when the user
directs subagents).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Change-Id: I9d5797fbed454079561fd2f4b36379ab7b7df02d
---
 corpus/skills/cat-mode/SKILL.md               |  1 +
 .../cat-mode/references/execution-routing.md  |  1 +
 .../skills/cat-mode/references/subagents.md   | 23 ++++++++
 .../cat-mode/scripts/route_execution.py       | 55 ++++++++++++++++---
 tests/test_execution_routing.py               | 41 ++++++++++++++
 5 files changed, 112 insertions(+), 9 deletions(-)

diff --git a/corpus/skills/cat-mode/SKILL.md b/corpus/skills/cat-mode/SKILL.md
index 97a3caba..c826356b 100644
--- a/corpus/skills/cat-mode/SKILL.md
+++ b/corpus/skills/cat-mode/SKILL.md
@@ -138,6 +138,7 @@ isolated subagents and report back async rather than blocking on each one.
   durable artifact.** Separable and parallel is not authorization to fan
   out; a fan-out default cannot hand a subagent publishing authority the
   routing table never granted. Route that work through Execution routing.
+- **Many PR stacks: one parallel unit per stack, never serial** (Invoker, else a worktree subagent each).
 - **A fork/subagent told to touch files must run in its own worktree, not
   the live checkout** — even when told "read-only." Scope wording is not
   filesystem isolation.
diff --git a/corpus/skills/cat-mode/references/execution-routing.md b/corpus/skills/cat-mode/references/execution-routing.md
index b5994260..dd105c7c 100644
--- a/corpus/skills/cat-mode/references/execution-routing.md
+++ b/corpus/skills/cat-mode/references/execution-routing.md
@@ -6,6 +6,7 @@ Catstack owns judgment and local fallback. Invoker owns durable plan submission,
 
 ## Decision
 
+0. **More than one independent publishing unit** (several PR stacks to land or repair, several workflows): never serial in the parent chat. Invoker first, one workflow per unit; `subagent_worktree_per_unit` when Invoker is unavailable or the user directs subagents. `route_execution(units=N)` returns it; see [subagents.md](subagents.md).
 1. **Invoker unavailable** (no `invoker_prepare_plan_review` / `invoker_submit_plan` tools): stay local — subagents, `loop-generator`, `land-stack`, current chat execution.
 2. **Small local work** (one-file fix, short edit, read-only question): stay local even if Invoker is installed. Post-land wait until `MERGED`, merge-queue babysit, and already-named execution Backlog are **not** this bucket — they are `durable_parallel`.
 3. **Approved plan or durable/parallel work** and Invoker MCP is available: delegate. If Invoker is missing, use a separate git worktree + PR stack. Do not park that work in the parent chat.
diff --git a/corpus/skills/cat-mode/references/subagents.md b/corpus/skills/cat-mode/references/subagents.md
index 8180b19c..5ed7b83d 100644
--- a/corpus/skills/cat-mode/references/subagents.md
+++ b/corpus/skills/cat-mode/references/subagents.md
@@ -36,6 +36,29 @@ definition whatever `produces` claims; and an empty or unrecognized `produces`
 raises rather than falling through to fan-out, because an output nobody
 declared is unchecked, not clean.
 
+## Many stacks: parallel per unit, never serial
+
+Routing picks *who* runs publishing work; it never licenses running several
+independent units one after another in the parent thread. When the work is N
+independent PR stacks (landing, conflict repair, review fixes), each stack is
+its own unit with its own worktree, and the units run in parallel: an Invoker
+workflow per stack first, and one worktree-isolated subagent per stack as the
+fallback when Invoker is unavailable or the user directs it
+(`subagent_worktree_per_unit`). The per-unit subagent still inherits only the
+scope the parent names, and its transcript is still grepped for writes.
+
+The failure shape: asked to land dozens of admin-bypass PRs across two repos,
+the parent recommended working the ~20 rebases and review fixes "one at a
+time" and started serially in one worktree, until the user asked for a
+worktree subagent per stack. The routing table allowed it: `route_execution`
+returned `local` for publishing work without Invoker at any unit count.
+
+Prior art: Amdahl's law — Gene M. Amdahl, "Validity of the single processor
+approach to achieving large scale computing capabilities", AFIPS 1967,
+https://doi.org/10.1145/1465482.1465560 — the serial fraction bounds the
+whole job, so independent units forced through one thread set the finish
+time.
+
 ## Defer to the harness's routing skill
 
 The precedence above is catstack's fallback, not the owner. When a harness
diff --git a/corpus/skills/cat-mode/scripts/route_execution.py b/corpus/skills/cat-mode/scripts/route_execution.py
index 4fbf7028..2ad1bc08 100644
--- a/corpus/skills/cat-mode/scripts/route_execution.py
+++ b/corpus/skills/cat-mode/scripts/route_execution.py
@@ -11,8 +11,8 @@
 from typing import Literal
 
 WorkKind = Literal["readonly", "small_local", "approved_plan", "durable_parallel"]
-Route = Literal["local", "delegate_invoker"]
-Delegation = Literal["local", "delegate_invoker", "subagent_fanout"]
+Route = Literal["local", "delegate_invoker", "subagent_worktree_per_unit"]
+Delegation = Literal["local", "delegate_invoker", "subagent_fanout", "subagent_worktree_per_unit"]
 
 DURABLE_ALIASES = frozenset({"post_land_babysit", "named_execution_backlog"})
 
@@ -36,6 +36,13 @@
     "invoker_wait_for_workflow_or_status",
 )
 
+SUBAGENT_PER_UNIT_STEPS = (
+    "one_worktree_per_unit",
+    "spawn_one_subagent_per_unit_in_parallel",
+    "collect_reports_async",
+    "grep_transcripts_for_writes",
+)
+
 SUBAGENT_FANOUT_STEPS = (
     "spawn_worktree_isolated_subagents",
     "collect_reports_async",
@@ -72,14 +79,32 @@ def normalize_work_kind(work_kind: str) -> WorkKind:
     raise ValueError(f"unknown work_kind: {work_kind!r}")
 
 
-def route_execution(*, tools: set[str] | frozenset[str] | list[str], work_kind: str) -> Route:
+def route_execution(
+    *,
+    tools: set[str] | frozenset[str] | list[str],
+    work_kind: str,
+    units: int = 1,
+    user_directed_subagents: bool = False,
+) -> Route:
     """Return where execution should run for this request.
 
-    1. Invoker MCP missing → local
-    2. Small / read-only work → local even if Invoker exists
-    3. Approved plan or durable/parallel → delegate_invoker
+    `units` counts independent publishing units (PR stacks, workflows).
+    More than one never runs serially in the parent thread:
+    Invoker first, else one worktree-isolated subagent per unit.
+
+    1. units > 1 → delegate_invoker, or subagent_worktree_per_unit when
+       Invoker is missing or the user directed subagents
+    2. Invoker MCP missing → local
+    3. Small / read-only work → local even if Invoker exists
+    4. Approved plan or durable/parallel → delegate_invoker
     """
     kind = normalize_work_kind(work_kind)
+    if units < 1:
+        raise ValueError(f"units must be >= 1, got {units!r}")
+    if units > 1 and kind != "readonly":
+        if invoker_mcp_available(tools) and not user_directed_subagents:
+            return "delegate_invoker"
+        return "subagent_worktree_per_unit"
     if not invoker_mcp_available(tools):
         return "local"
     if kind in ("readonly", "small_local"):
@@ -112,6 +137,8 @@ def route_delegation(
     tools: set[str] | frozenset[str] | list[str],
     work_kind: str,
     produces: set[str] | frozenset[str] | list[str] | tuple[str, ...],
+    units: int = 1,
+    user_directed_subagents: bool = False,
 ) -> Delegation:
     """Resolve the Subagents default against the execution-routing table.
 
@@ -122,7 +149,9 @@ def route_delegation(
     """
     normalize_work_kind(work_kind)
     if publishes(work_kind=work_kind, produces=produces):
-        return route_execution(tools=tools, work_kind=work_kind)
+        return route_execution(
+            tools=tools, work_kind=work_kind, units=units, user_directed_subagents=user_directed_subagents,
+        )
     return "subagent_fanout"
 
 
@@ -131,6 +160,8 @@ def handoff_steps_for(route: Route | Delegation) -> tuple[str, ...]:
         return ("stay_local",)
     if route == "subagent_fanout":
         return SUBAGENT_FANOUT_STEPS
+    if route == "subagent_worktree_per_unit":
+        return SUBAGENT_PER_UNIT_STEPS
     return DELEGATE_HANDOFF_STEPS
 
 
@@ -142,9 +173,15 @@ def handoff_steps_for(route: Route | Delegation) -> tuple[str, ...]:
     tools = payload.get("tools", [])
     work_kind = payload.get("work_kind", "small_local")
     produces = payload.get("produces")
+    units = int(payload.get("units", 1))
+    directed = bool(payload.get("user_directed_subagents", False))
     if produces is None:
-        route: Route | Delegation = route_execution(tools=tools, work_kind=work_kind)
+        route: Route | Delegation = route_execution(
+            tools=tools, work_kind=work_kind, units=units, user_directed_subagents=directed,
+        )
     else:
-        route = route_delegation(tools=tools, work_kind=work_kind, produces=produces)
+        route = route_delegation(
+            tools=tools, work_kind=work_kind, produces=produces, units=units, user_directed_subagents=directed,
+        )
     defer_to = installed_harness_routing_skill(payload.get("home"))
     print(json.dumps({"route": route, "steps": list(handoff_steps_for(route)), "defer_to": defer_to}))
diff --git a/tests/test_execution_routing.py b/tests/test_execution_routing.py
index 49b3a80f..8fb7bddb 100644
--- a/tests/test_execution_routing.py
+++ b/tests/test_execution_routing.py
@@ -40,6 +40,47 @@ def test_partial_tools_still_local(self):
         )
         self.assertEqual(route, "local")
 
+    def test_many_publishing_units_never_run_serially(self):
+        tools = list(self.router.INVOKER_REQUIRED_TOOLS)
+        for kind in ("durable_parallel", "approved_plan", "post_land_babysit", "small_local"):
+            for available in (tools, []):
+                with self.subTest(kind=kind, invoker=bool(available)):
+                    route = self.router.route_execution(tools=available, work_kind=kind, units=13)
+                    self.assertNotEqual(route, "local")
+
+    def test_many_units_prefer_invoker_then_worktree_subagent_per_unit(self):
+        tools = list(self.router.INVOKER_REQUIRED_TOOLS)
+        self.assertEqual(
+            self.router.route_execution(tools=tools, work_kind="post_land_babysit", units=13),
+            "delegate_invoker",
+        )
+        self.assertEqual(
+            self.router.route_execution(tools=[], work_kind="post_land_babysit", units=13),
+            "subagent_worktree_per_unit",
+        )
+        self.assertEqual(
+            self.router.route_execution(
+                tools=tools, work_kind="post_land_babysit", units=13, user_directed_subagents=True,
+            ),
+            "subagent_worktree_per_unit",
+        )
+        steps = self.router.handoff_steps_for("subagent_worktree_per_unit")
+        self.assertEqual(steps[0], "one_worktree_per_unit")
+        self.assertIn("grep_transcripts_for_writes", steps)
+
+    def test_many_units_route_delegation_reaches_per_unit_route(self):
+        route = self.router.route_delegation(
+            tools=[], work_kind="durable_parallel", produces=["pull_request"], units=4,
+        )
+        self.assertEqual(route, "subagent_worktree_per_unit")
+
+    def test_units_must_be_positive(self):
+        with self.assertRaises(ValueError):
+            self.router.route_execution(tools=[], work_kind="durable_parallel", units=0)
+
+    def test_single_unit_keeps_existing_routes(self):
+        self.assertEqual(self.router.route_execution(tools=[], work_kind="approved_plan", units=1), "local")
+
     def test_small_local_stays_local_even_with_invoker(self):
         tools = list(self.router.INVOKER_REQUIRED_TOOLS)
         for kind in ("small_local", "readonly"):

From 13ab621032e05a184793ddf0f3012ebac5084eea Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbert.chan@yahoo.com>
Date: Tue, 22 Sep 2026 00:59:32 -0700
Subject: [PATCH 12/14] reflect: catch an evidence-order correction from the
 ledger transition, not from wording

Both retraction detectors need a wrongness word. Two real corrections carry
none, because the claim was true and only its order was wrong:

  "Correcting one claim and arming the check I implied:"
  "I was right - but I said it a turn before I checked it"

Primary fix, no regex and no model: a ledger row going outstanding ->
discharged IS the event "a claim was asserted before its check ran, and the
check has now run". The Stop that discharges a row now reports it as a reflect
trigger. It reads state, so the reply's wording is not consulted at all.

Secondary fix: the judge dictionary's meaning now covers "right, but said
before it was checked", and both real strings are eval cases. Run against the
real judge, all six cases land where the dictionary says they should.

The regex scan keeps its hole on purpose, pinned by three tests so the next
author widens it knowingly rather than by accident.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Change-Id: I99190104b68d88f78aa9c8a706c9a6d23055aecc
---
 .../phrases/wrong-check-reflect.json          |  6 ++--
 engine/hooks/unverified-tag-ledger/README.md  |  6 ++++
 engine/hooks/unverified-tag-ledger/detect.py  | 35 ++++++++++++++-----
 .../unverified-tag-ledger/tests/test_hooks.py | 30 ++++++++++++++++
 .../wrong-check-reflect/eval_dictionary.py    |  3 ++
 .../tests/test_self_retraction_scan.py        | 24 +++++++++++++
 6 files changed, 93 insertions(+), 11 deletions(-)

diff --git a/engine/hooks/llm-judge/phrases/wrong-check-reflect.json b/engine/hooks/llm-judge/phrases/wrong-check-reflect.json
index 173dbcbe..cf121c91 100644
--- a/engine/hooks/llm-judge/phrases/wrong-check-reflect.json
+++ b/engine/hooks/llm-judge/phrases/wrong-check-reflect.json
@@ -1,7 +1,7 @@
 {
   "checker": "wrong-check-reflect",
   "reads": "reply",
-  "meaning": "The latest assistant reply admits that something it told the user earlier was wrong, misread, or answered the wrong question.",
+  "meaning": "The latest assistant reply admits that something it told the user earlier was wrong, misread, or answered the wrong question, OR that an earlier claim of its own went out before the check backing it had run. A reply saying the claim turned out correct but was stated before it was checked IS a match: the failure is the order, not the answer, so no word in the reply has to say anything was wrong.",
   "match": [
     "my earlier check was wrong",
     "You're right, I misread that",
@@ -10,7 +10,9 @@
     "I was wrong about the path",
     "Correction: the file I pointed you to earlier is not the one in use; the real one is src/b.py.",
     "Good catch. The earlier number was off; the real count is 12.",
-  "My earlier read of the config was wrong \u2014 the default is 4, not 8."
+    "My earlier read of the config was wrong \u2014 the default is 4, not 8.",
+    "Correcting one claim and arming the check I implied:",
+    "I was right - but I said it a turn before I checked it"
   ],
   "not_match": [
     "You're right. Let's go with option B.",
diff --git a/engine/hooks/unverified-tag-ledger/README.md b/engine/hooks/unverified-tag-ledger/README.md
index ccfa1d8c..121cd94a 100644
--- a/engine/hooks/unverified-tag-ledger/README.md
+++ b/engine/hooks/unverified-tag-ledger/README.md
@@ -53,6 +53,12 @@ fixtures in `tests/test_hooks.py`.
   reason is written to stderr.
 - **Escalation** — a claim outstanding `ESCALATE_AFTER_TURNS` (3) turns or more
   is reported as a reflect trigger rather than accumulating quietly.
+- **Discharge is itself a reflect trigger** — a row going outstanding ->
+  discharged is the record of a claim that went out first and was checked
+  after. That is an evidence-order miss, and it carries no wrongness word, so
+  the phrase scanners (`engine/skills/reflect/scripts/self_retraction_scan.py`,
+  and the `wrong-check-reflect` dictionary) cannot see it from the text. This
+  hook sees it from state instead, and says so on the Stop that discharges.
 
 Malformed tags are deliberately ignored here; `diu-stop` already rejects those.
 
diff --git a/engine/hooks/unverified-tag-ledger/detect.py b/engine/hooks/unverified-tag-ledger/detect.py
index 8a47c2ef..1f54902d 100644
--- a/engine/hooks/unverified-tag-ledger/detect.py
+++ b/engine/hooks/unverified-tag-ledger/detect.py
@@ -34,6 +34,15 @@
 ESCALATE_AFTER_TURNS = 3
 MAX_LISTED = 5
 
+DISCHARGE_REFLECT = (
+    "unverified-tag-ledger: {count} claim(s) went from unverified to checked this turn: "
+    "{claims}. That transition is the whole event: the claim went out first and the check "
+    "ran after. No wording has to admit anything for this to be true, which is why the "
+    "phrase scanners miss it -- an evidence-order miss carries no wrongness word. "
+    "Treat it as a reflect trigger, not a milestone: run reflect on this transcript, or "
+    "say plainly why this one does not need it."
+)
+
 CLAIM_RE = re.compile(
     r"\{\{\s*CAT-UNVERIFIED\s*:?\s*(?P<claim>.*?)(?:--|—)\s*cannot\s+verify\s*:\s*(?P<reason>[^}]*)\}\}",
     re.IGNORECASE | re.DOTALL,
@@ -177,18 +186,26 @@ def evaluate(payload: dict) -> dict:
     session_id = str(payload.get("session_id") or "")
     message = _last_assistant_text(payload)
     tools = tools_used_this_turn(payload)
+    was_open = {row["claim"] for row in outstanding(read_ledger(session_id))}
     rows = record_turn(session_id, message, tools)
+    notes = []
+    discharged = sorted(
+        row["claim"] for row in rows if row.get("resolved") and row["claim"] in was_open)
+    if discharged:
+        notes.append(DISCHARGE_REFLECT.format(
+            count=len(discharged), claims="; ".join(discharged[:MAX_LISTED])))
 
     new_claims = {tag["claim"] for tag in parse_tags(message)}
     if not new_claims:
-        return {"note": "", "block": ""}
+        return {"note": "\n".join(notes), "block": ""}
 
     if tools is None:
-        return {"note": (
+        notes.append(
             f"unverified-tag-ledger: logged {len(new_claims)} CAT-UNVERIFIED claim(s), but this "
             "turn's tool calls could not be read from transcript_path (see the line above), so "
             "whether a check was attempted is UNCHECKED, not clean. Nothing was discharged and "
-            "the turn was not refused."), "block": ""}
+            "the turn was not refused.")
+        return {"note": "\n".join(notes), "block": ""}
 
     if not tools & VERIFY_TOOLS and not payload.get("stop_hook_active"):
         claims = "; ".join(sorted(new_claims)[:MAX_LISTED])
@@ -201,12 +218,12 @@ def evaluate(payload: dict) -> dict:
 
     fresh = [row for row in rows
              if row["claim"] in new_claims and not row.get("resolved") and row.get("turns", 0) == 0]
-    if not fresh:
-        return {"note": "", "block": ""}
-    return {"note": (
-        f"unverified-tag-ledger: logged {len(fresh)} CAT-UNVERIFIED claim(s) against this session. "
-        "They are deferred, not discharged, and will be raised again next turn "
-        "(cat-mode/SKILL.md:269)."), "block": ""}
+    if fresh:
+        notes.append(
+            f"unverified-tag-ledger: logged {len(fresh)} CAT-UNVERIFIED claim(s) against this "
+            "session. They are deferred, not discharged, and will be raised again next turn "
+            "(cat-mode/SKILL.md:269).")
+    return {"note": "\n".join(notes), "block": ""}
 
 
 def decide_stop(payload: dict) -> str:
diff --git a/engine/hooks/unverified-tag-ledger/tests/test_hooks.py b/engine/hooks/unverified-tag-ledger/tests/test_hooks.py
index 12ab9931..251cede6 100644
--- a/engine/hooks/unverified-tag-ledger/tests/test_hooks.py
+++ b/engine/hooks/unverified-tag-ledger/tests/test_hooks.py
@@ -38,6 +38,9 @@
     "-- cannot verify: my own reasoning isn't observable by any command}}")
 MALFORMED = "{{CAT-UNVERIFIED: something I did not check}}"
 
+EVIDENCE_ORDER_1 = "Correcting one claim and arming the check I implied:"
+EVIDENCE_ORDER_2 = "I was right - but I said it a turn before I checked it"
+
 
 def _real_transcript_lines() -> list[str]:
     with open(REAL_TRANSCRIPT, encoding="utf-8") as handle:
@@ -209,6 +212,33 @@ def test_verified_and_dropped_tag_is_discharged_through_the_real_payload(self) -
         self.assertEqual(self.detect.outstanding(self.detect.read_ledger("s1")), [])
         self.assertEqual(self.detect.reminder("s1"), "")
 
+    def test_a_discharged_claim_fires_the_reflect_trigger(self) -> None:
+        self.detect.evaluate(self.payload(REAL_TAG_1, tools=True))
+        verdict = self.detect.evaluate(
+            self.payload("Here is the pasted output proving it.", tools=True))
+        self.assertIn("reflect trigger", verdict["note"])
+        self.assertIn("widened scope", verdict["note"])
+
+    def test_an_evidence_order_correction_triggers_with_no_wrongness_word(self) -> None:
+        """The transition fires; the reply's wording is not consulted at all."""
+        for index, reply in enumerate((EVIDENCE_ORDER_1, EVIDENCE_ORDER_2)):
+            session = f"evidence-order-{index}"
+            self.detect.evaluate(self.payload(REAL_TAG_1, tools=True, session_id=session))
+            verdict = self.detect.evaluate(
+                self.payload(reply, tools=True, session_id=session))
+            self.assertIn("reflect trigger", verdict["note"])
+            self.assertIn("carries no wrongness word", verdict["note"])
+
+    def test_a_turn_that_discharges_nothing_stays_silent_about_reflect(self) -> None:
+        verdict = self.detect.evaluate(
+            self.payload("Ran the tests, all green.", tools=True))
+        self.assertEqual(verdict["note"], "")
+
+    def test_a_reemitted_tag_is_not_reported_as_discharged(self) -> None:
+        self.detect.evaluate(self.payload(REAL_TAG_1, tools=True))
+        verdict = self.detect.evaluate(self.payload(REAL_TAG_1, tools=True))
+        self.assertNotIn("reflect trigger", verdict["note"])
+
     def test_unchecked_turn_does_not_discharge_a_row(self) -> None:
         self.detect.evaluate(self.payload(REAL_TAG_1, tools=True))
         self.detect.evaluate({
diff --git a/engine/hooks/wrong-check-reflect/eval_dictionary.py b/engine/hooks/wrong-check-reflect/eval_dictionary.py
index 258dabb2..9a9e8927 100644
--- a/engine/hooks/wrong-check-reflect/eval_dictionary.py
+++ b/engine/hooks/wrong-check-reflect/eval_dictionary.py
@@ -17,6 +17,9 @@
     (HIT_TEXT, True),
     ("You're right. Let's go with option B.", False),
     ("I double-checked my earlier count and it holds; nothing in it was wrong.", False),
+    ("Correcting one claim and arming the check I implied:", True),
+    ("I was right - but I said it a turn before I checked it", True),
+    ("I ran the check first and then said it, so the order was right.", False),
 )
 
 
diff --git a/engine/skills/reflect/scripts/tests/test_self_retraction_scan.py b/engine/skills/reflect/scripts/tests/test_self_retraction_scan.py
index 72266f87..85258277 100644
--- a/engine/skills/reflect/scripts/tests/test_self_retraction_scan.py
+++ b/engine/skills/reflect/scripts/tests/test_self_retraction_scan.py
@@ -74,6 +74,30 @@ def test_third_party_blame_inside_a_reported_clause_stays_clean(self):
         self.assertIsNone(self_retraction_scan.find_admission(text))
 
 
+class TestEvidenceOrderIsOutOfReach(unittest.TestCase):
+    """Two real corrections this scan cannot see, and the reason it cannot.
+
+    Both are corrections about evidence ORDER: the claim was true, and it was
+    asserted before the check ran. Nothing in either sentence says anything was
+    wrong, so every pattern here misses them by construction. Pinned so the
+    next author widens the regex knowingly rather than by accident: the catch
+    for this class is the unverified-tag-ledger discharge transition, which
+    reads state rather than wording.
+    """
+
+    def test_arming_the_implied_check_is_not_reachable_by_wording(self):
+        text = "Correcting one claim and arming the check I implied:"
+        self.assertIsNone(self_retraction_scan.find_admission(text))
+
+    def test_right_but_asserted_early_is_not_reachable_by_wording(self):
+        text = "I was right - but I said it a turn before I checked it"
+        self.assertIsNone(self_retraction_scan.find_admission(text))
+
+    def test_the_same_sentence_with_a_wrongness_word_does_fire(self):
+        text = "I was wrong about the path; I said it a turn before I checked it."
+        self.assertIsNotNone(self_retraction_scan.find_admission(text))
+
+
 class TestScanAssistantTexts(unittest.TestCase):
     def test_collects_one_hit_per_admission(self):
         hits = self_retraction_scan.scan_assistant_texts(

From 8ae48c3876473d024ba0bdff3699696febb9dc2b Mon Sep 17 00:00:00 2001
From: CI Bot <ci@invoker.dev>
Date: Thu, 24 Sep 2026 03:22:20 +0000
Subject: [PATCH 13/14] =?UTF-8?q?invoker:=20wf-1790219068137-115/repair=20?=
 =?UTF-8?q?=E2=80=94=20Repair=20PR=20#890:=20failed=5Fchecks:=20validate;?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Exit code: 0

From 1c598ed94e91a09e71c6d260d3d25b56d5be232d Mon Sep 17 00:00:00 2001
From: Edbert Chan <edbertchantech@gmail.com>
Date: Thu, 24 Sep 2026 12:07:55 +0800
Subject: [PATCH 14/14] make-pr: preflight hands the validator the changed
 files

The required PR Body check passes --changed-files-file, which is how the
validator rejects changed file and folder names in the Summary and a
Review Unit that does not match the diff. Preflight passed only
--body-file, so those descriptions passed locally and failed after
publish. describe() now takes the changed paths preflight already
computed and writes them to a temp file for the validator.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Change-Id: Id36a64869b7cfb2b76b912fd3cf81a88a39dd344
---
 engine/skills/make-pr/scripts/preflight.py    | 29 +++++++++++--------
 .../make-pr/tests/test_description_check.py   |  8 ++---
 engine/skills/make-pr/tests/test_preflight.py | 26 +++++++++++++++++
 3 files changed, 47 insertions(+), 16 deletions(-)

diff --git a/engine/skills/make-pr/scripts/preflight.py b/engine/skills/make-pr/scripts/preflight.py
index e3c23704..91b0fd0f 100644
--- a/engine/skills/make-pr/scripts/preflight.py
+++ b/engine/skills/make-pr/scripts/preflight.py
@@ -28,6 +28,7 @@
 import shutil
 import subprocess
 import sys
+import tempfile
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
@@ -225,7 +226,7 @@ def changed_paths(base: str, repo: str = REPO_ROOT) -> list[str]:
     return sorted({p for p in (out + untracked).splitlines() if p.strip()})
 
 
-def validate_body(body_file: str, run=None, which=None) -> tuple[int, list[str]]:
+def validate_body(body_file: str, run=None, which=None, changed_paths: list[str] | None = None) -> tuple[int, list[str]]:
     """Run the PR-body schema validator that the required PR Body check runs.
 
     description_check only reads the prose for history claims, so a body whose
@@ -240,20 +241,24 @@ def validate_body(body_file: str, run=None, which=None) -> tuple[int, list[str]]
         return 1, [f"description unchecked: node is not on PATH, so {VALIDATOR_NAME} did not run"]
     if not os.path.isfile(os.path.join(REPO_ROOT, VALIDATOR)):
         return 1, [f"description unchecked: no {VALIDATOR} under {REPO_ROOT}"]
-    cmd = ["node", VALIDATOR, "--body-file", os.path.abspath(body_file)]
-    try:
-        res = run(cmd, cwd=REPO_ROOT, capture_output=True, text=True, timeout=VALIDATOR_TIMEOUT)
-    except subprocess.TimeoutExpired:
-        return 1, [f"description unchecked: {VALIDATOR_NAME} did not finish in {VALIDATOR_TIMEOUT}s"]
-    except OSError as exc:
-        return 1, [f"description unchecked: cannot run {VALIDATOR_NAME}: {exc}"]
+    with tempfile.TemporaryDirectory(prefix="preflight-") as tmp:
+        files_file = os.path.join(tmp, "changed-files.txt")
+        with open(files_file, "w", encoding="utf-8") as handle:
+            handle.writelines(p + "\n" for p in changed_paths or [])
+        cmd = ["node", VALIDATOR, "--body-file", os.path.abspath(body_file), "--changed-files-file", files_file]
+        try:
+            res = run(cmd, cwd=REPO_ROOT, capture_output=True, text=True, timeout=VALIDATOR_TIMEOUT)
+        except subprocess.TimeoutExpired:
+            return 1, [f"description unchecked: {VALIDATOR_NAME} did not finish in {VALIDATOR_TIMEOUT}s"]
+        except OSError as exc:
+            return 1, [f"description unchecked: cannot run {VALIDATOR_NAME}: {exc}"]
     lines = (res.stdout + res.stderr).strip().splitlines()
     if res.returncode in (0, 1):
         return res.returncode, lines
     return 1, lines + [f"description unchecked: {VALIDATOR_NAME} exited {res.returncode}"]
 
 
-def describe(body_file: str | None) -> int:
+def describe(body_file: str | None, changed_paths: list[str]) -> int:
     if not body_file:
         print("fail    description unchecked: pass --body-file with the PR description")
         return 1
@@ -272,8 +277,8 @@ def describe(body_file: str | None) -> int:
     print(f"        description {outcome}")
     status = 0 if outcome == "clean" else 1
 
-    print(f"gate    node {VALIDATOR} --body-file " + body_file)
-    schema_status, schema_lines = validate_body(body_file)
+    print(f"gate    node {VALIDATOR} --body-file {body_file} --changed-files-file <{len(changed_paths)} changed path(s)>")
+    schema_status, schema_lines = validate_body(body_file, changed_paths=changed_paths)
     for line in schema_lines:
         print("        " + line)
     return status or schema_status
@@ -338,7 +343,7 @@ def main(argv: list[str] | None = None) -> int:
         if res.returncode != 0:
             status = 1
     if args.paths is None and not args.dry_run:
-        if describe(args.body_file) != 0:
+        if describe(args.body_file, paths) != 0:
             status = 1
     print("ok      preflight passed" if status == 0 else "fail    preflight: fix the above before gh pr create")
     return status
diff --git a/engine/skills/make-pr/tests/test_description_check.py b/engine/skills/make-pr/tests/test_description_check.py
index 60286071..1058f206 100644
--- a/engine/skills/make-pr/tests/test_description_check.py
+++ b/engine/skills/make-pr/tests/test_description_check.py
@@ -83,14 +83,14 @@ class TestPreflightDescription(unittest.TestCase):
     def test_missing_body_file_fails_as_unchecked(self):
         out = io.StringIO()
         with redirect_stdout(out):
-            status = preflight.describe(None)
+            status = preflight.describe(None, [])
         self.assertEqual(status, 1)
         self.assertIn("description unchecked", out.getvalue())
 
     def test_unreadable_body_file_fails_as_unchecked(self):
         out = io.StringIO()
         with redirect_stdout(out):
-            status = preflight.describe("/nonexistent/body.md")
+            status = preflight.describe("/nonexistent/body.md", [])
         self.assertEqual(status, 1)
         self.assertIn("cannot read", out.getvalue())
 
@@ -101,13 +101,13 @@ def test_clean_body_file_passes(self):
         original = description_check.check
         original_validate = preflight.validate_body
         description_check.check = lambda body: ("clean", [])
-        preflight.validate_body = lambda body_file: (0, ["PR body validation passed."])
+        preflight.validate_body = lambda body_file, changed_paths: (0, ["PR body validation passed."])
         try:
             with tempfile.NamedTemporaryFile("w", suffix=".md", delete=False) as handle:
                 handle.write(BODY)
             out = io.StringIO()
             with redirect_stdout(out):
-                status = preflight.describe(handle.name)
+                status = preflight.describe(handle.name, [])
         finally:
             description_check.check = original
             preflight.validate_body = original_validate
diff --git a/engine/skills/make-pr/tests/test_preflight.py b/engine/skills/make-pr/tests/test_preflight.py
index 7744a9c0..928595e4 100644
--- a/engine/skills/make-pr/tests/test_preflight.py
+++ b/engine/skills/make-pr/tests/test_preflight.py
@@ -419,6 +419,32 @@ def test_a_body_the_validator_accepts_still_passes(self):
         self.assertIn("PR body validation passed.", out)
         self.assertIn("ok      preflight passed", out)
 
+    def test_a_changed_file_name_in_the_summary_fails_like_the_required_check(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            body_file = os.path.join(tmp, "body.md")
+            with open(body_file, "w", encoding="utf-8") as handle:
+                handle.write(VALID_BODY.replace("Now one script does it.", "Now the ecosystem page does it."))
+            status, out = run_preflight(body_file)
+        self.assertEqual(status, 1, out)
+        self.assertIn('"ecosystem" (changed file name)', out)
+        self.assertNotIn("ok      preflight passed", out)
+
+    def test_the_validator_is_handed_the_changed_files(self):
+        seen = {}
+
+        def records(cmd, **kwargs):
+            flag = cmd.index("--changed-files-file")
+            with open(cmd[flag + 1], encoding="utf-8") as handle:
+                seen["files"] = handle.read().split()
+            return subprocess.CompletedProcess(cmd, 0, stdout="PR body validation passed.", stderr="")
+
+        status, lines = pf.validate_body(
+            PR795_BODY, run=records, which=lambda name: "/usr/bin/node",
+            changed_paths=["a/b.py", "docs/ecosystem.md"],
+        )
+        self.assertEqual(status, 0, lines)
+        self.assertEqual(seen["files"], ["a/b.py", "docs/ecosystem.md"])
+
     def test_a_missing_node_is_unchecked_not_a_pass(self):
         status, lines = pf.validate_body(PR795_BODY, which=lambda name: None)
         self.assertEqual(status, 1, lines)