From 7e8aa2f81fcf99eb814d23e992a194649d1bc8ce Mon Sep 17 00:00:00 2001
From: dlovell <dlovell@gmail.com>
Date: Tue, 4 Aug 2026 16:57:13 +0000
Subject: [PATCH 1/6] test: guard the wiring, not just the unit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The #95/#96/#97 family — restate-and-compare, fails open — is fixed for
EXPECTATIONS. It survived for WIRING: whether production actually reaches the
guarded unit, with the right argv, at the right stage. A suite can be rung 2
on the fact and rung 3 on the call. Three holes, each mutation-proven green
before this change.

1. setup() need not call the chown at all. Deleting
   chown_named_volume_targets from setup() left test-volume-chown-guard.sh at
   21/0 and tests/run-all at exit 0, while every named-volume mount point
   stays root-owned on every cold start. Now the suite extracts setup()'s body
   and asserts the call.

2. The <argv0> injection contract was unguarded. `sh -c <script> <argv0>
   <args...>` puts the first operand in $0; drop it and the first mount point
   is swallowed and never chowned. The suite composed its own invocation
   instead of reading the executed one — the same one-directional shape as
   #95. It now reads the real line, asserts an argv0 is present, and uses the
   extracted value in its own invocation.

3. The ADR-0003 pre-commit gate could be moved off the commit stage. Adding
   `stages: [manual]` left test-gitignore-agents-reinclusion.sh at 14/0 while
   a commit with a broken live .gitignore went through clean (rc 0; rc 1 with
   the hook restored). The greps for `entry:` and `always_run:` say nothing
   about when the hook fires. Checked hermetically by parsing the hook block —
   pre-commit is not installed in the Bash-tests CI job, and skipping there
   would be the same "verification never ran" shape this fixes.

Invariants 23 and 24 now state the wiring halves they relied on.

Found by the structural audit of 88d16b4.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 CLAUDE.md                                  | 14 +++++++---
 tests/test-gitignore-agents-reinclusion.sh | 25 +++++++++++++++++
 tests/test-volume-chown-guard.sh           | 32 +++++++++++++++++++++-
 3 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 8c1de22..c8d2105 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -231,13 +231,19 @@ taxonomy and reads as `test:`.
   prevents is bounded because the glob, not the workflow, enumerates suites).
 - Container-side root logic lives in `lib/*.sh` and is INJECTED per run via
   `dc exec ... sh -c "$script" <argv0> <args...>` — a runtime input: no
-  rebuild, no fingerprint entry unless it is also COPYed
-  (`tests/test-volume-chown-guard.sh` pins the volume-perms driver line).
+  rebuild, no fingerprint entry unless it is also COPYed. The `<argv0>`
+  operand is load-bearing and was itself unguarded: without it the first mount
+  point becomes `$0` and is silently never chowned
+  (`test: tests/test-volume-chown-guard.sh` pins the driver line, reads the
+  executed injection line, and asserts the argv0 is present).
 - `setup()` runs on EVERY cold start (gated only on `is_running`), so its
   steps must be idempotent and cheap. The named-volume chown is guarded by one
   owner+group stat, sound because `chown -R` is post-order: an interrupted
-  walk leaves the mount point root-owned and retries next start
-  (`tests/test-volume-chown-guard.sh`).
+  walk leaves the mount point root-owned and retries next start. That the
+  chown is *called* from `setup()` at all is part of the invariant and was
+  mutable-green until the audit — the suite exercised the lib without checking
+  production reached it (`test: tests/test-volume-chown-guard.sh`, which now
+  extracts `setup()`'s body and asserts the call).
 - Lock discipline: per-worktree lock on fd 9, repo-scoped build lock on fd 8;
   any helper backgrounded inside the locked region must be spawned with
   `9>&-` or it holds the worktree lock forever (`test:
diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index 9fb5bfc..fe00c40 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -6,6 +6,12 @@
 # warning). The live file is untracked, so the probe is the guard for a fact
 # no hermetic test over committed files can see; this suite guards the probe.
 #
+# Verified (ADR-0005 §2), audit round: adding `stages: [manual]` to the hook in
+# .pre-commit-config.yaml left this suite at 14 passed / 0 failed while a commit
+# with a broken live .gitignore went through clean (rc 0; rc 1 with the hook
+# restored) — the ADR-0003 hard gate off, silently. Now FAILs "the hook runs at
+# the commit stage" (15 passed, 1 failed) (mutation run 2026-08-04).
+#
 # Verified (ADR-0005 §2), review round: reverting the probe to its dotfile name
 # and its `dir="${1:-.}"` handling, and un-gating the setup-worktree warning,
 # turns three assertions red — "a broken repo is still red when probed from a
@@ -85,6 +91,25 @@ assert_true "the pre-commit local hook runs the probe" \
     grep -q 'entry: dev/check-gitignore-agents' "$DEV_BASE/.pre-commit-config.yaml"
 assert_true "the hook runs even when no files match" \
     bash -c "grep -A5 'id: gitignore-agents-reinclusion' '$DEV_BASE/.pre-commit-config.yaml' | grep -q 'always_run: true'"
+# ...and runs at the COMMIT stage. Greps for `entry:` and `always_run:` say
+# nothing about when the hook fires: adding `stages: [manual]` left this suite
+# at 14/0 while a commit with a broken live .gitignore went through clean (rc 0
+# vs rc 1 with the hook restored). The gate #91/#94 exists to provide was off,
+# silently. Checked hermetically — pre-commit is not installed in the Bash-tests
+# CI job, and a skip there is the same "verification never ran" shape.
+hook_block="$(awk '/id: gitignore-agents-reinclusion/{f=1} f&&/^      - id: /&&!/gitignore-agents-reinclusion/{exit} f' \
+    "$DEV_BASE/.pre-commit-config.yaml")"
+assert_nonempty "the hook block was found in .pre-commit-config.yaml" "$hook_block"
+hook_stages="$(grep -oP '^\s*stages:\s*\K.*' <<<"$hook_block" || true)"
+if [ -z "$hook_stages" ]; then
+    _pass "the hook is not restricted off the commit stage (no stages: key)"
+elif grep -qE '(^|[^a-z-])(pre-commit|commit)([^a-z-]|$)' <<<"$hook_stages"; then
+    _pass "the hook's stages include the commit stage: $hook_stages"
+else
+    _fail "the hook runs at the commit stage" \
+        "stages: $hook_stages excludes pre-commit, so the ADR-0003 gate never" \
+        "fires on a real commit — silently, with this suite green."
+fi
 assert_true "setup-worktree warns through the same probe" \
     grep -q 'check-gitignore-agents' "$DEV_BASE/dev/setup-worktree"
 # ...but only where ADR-0003's convention is in force. setup-worktree runs on
diff --git a/tests/test-volume-chown-guard.sh b/tests/test-volume-chown-guard.sh
index 42238e4..802011a 100755
--- a/tests/test-volume-chown-guard.sh
+++ b/tests/test-volume-chown-guard.sh
@@ -21,6 +21,16 @@
 #   5. `chown -R` is post-order, the invariant the guard rests on: an interrupted
 #      run leaves the mount point unchowned, so it can't be read as completed
 #   6. the dev/devcontainer driver line still matches the lib's function
+# Verified (ADR-0005 §2), audit round — two mutations, BOTH 21 passed / 0 failed
+# before these assertions existed (and `tests/run-all` exit 0):
+#   - deleting `chown_named_volume_targets` from setup() (dev/devcontainer:835)
+#     => FAIL "setup() calls chown_named_volume_targets on every cold start".
+#     Every named-volume mount point stays root-owned on every cold start.
+#   - dropping the argv0 operand from the injection line (dev/devcontainer:828)
+#     => FAIL "the injection passes an argv0 before the mount points". The first
+#     mount point becomes $0 and is silently never chowned.
+#   (mutation runs 2026-08-04)
+#
 set -euo pipefail
 
 . "$(dirname "$(readlink -f "$0")")/lib/harness.sh"
@@ -160,6 +170,26 @@ driver='dev_chown_volume_targets vscode vscode /home/vscode "$@"'
 assert_true "dev/devcontainer drives the lib's function with (vscode, vscode, /home/vscode, \$@)" \
     grep -qF "$driver" "$DEV_BASE/dev/devcontainer"
 
+# ---- 6a. the wiring: setup() actually calls it, with the argv0 operand ----
+# Pinning the driver line proves the lib is driven correctly IF it runs. It does
+# not prove production reaches it. Both of these were mutable-green: deleting
+# the call from setup(), and dropping the argv0 operand, each left this suite at
+# 21/0 and `tests/run-all` at exit 0 while every named volume stayed root-owned.
+# Same one-directional shape as #95 — the suite composed its own invocation
+# instead of reading the executed one.
+setup_body="$(awk '/^setup\(\) \{/,/^\}/' "$DEV_BASE/dev/devcontainer")"
+assert_nonempty "setup() body extracted from dev/devcontainer" "$setup_body"
+assert_true "setup() calls chown_named_volume_targets on every cold start" \
+    grep -q 'chown_named_volume_targets' <<<"$setup_body"
+
+# The executed injection line, read rather than restated: `sh -c <script> <argv0>
+# <args...>` puts the first operand in $0, so without it the first mount point
+# is swallowed and silently never chowned.
+exec_line="$(grep -oP 'dc exec .*sh -c "\$script".*' "$DEV_BASE/dev/devcontainer" | head -1 || true)"
+assert_nonempty "the injection line was found in dev/devcontainer" "$exec_line"
+argv0="$(grep -oP 'sh -c "\$script"\s+\K[^"\s$]+' <<<"$exec_line" || true)"
+assert_nonempty "the injection passes an argv0 before the mount points" "$argv0"
+
 # The injected script must be valid POSIX sh and must pick the mount points out
 # of "$@" — the `sh -c <script> <argv0> <args...>` convention the caller relies
 # on. Composed here the same way chown_named_volume_targets composes it.
@@ -168,7 +198,7 @@ $driver"
 assert_true "injected script parses as POSIX sh" sh -n -c "$script"
 
 : >"$CHOWN_LOG"
-sh -c "$script" volume-perms "/home/vscode/.cache/uv"
+sh -c "$script" "$argv0" "/home/vscode/.cache/uv"
 # assert_contains, not assert_eq: the guard probes the REAL /home/vscode/.cache/uv,
 # so on a machine where that path exists with a non-vscode owner a chown -R line
 # is also (correctly) logged. Only the unconditional ancestor chown is

From 30f7f34e517c690cd0cc26f45f74c0ab3fda09ed Mon Sep 17 00:00:00 2001
From: dlovell <dlovell@gmail.com>
Date: Tue, 4 Aug 2026 17:14:36 +0000
Subject: [PATCH 2/6] fix(guards): close two fail-open holes found reviewing
 this PR
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The stage check shipped guarding only half the YAML it needed to.

- `stages:` can be written flow-style (`stages: [manual]`) or block-style
  (`stages:` then indented `- manual`). The parse read only the flow form, so
  the block form produced an EMPTY match and took the "no stages: key" pass —
  the ADR-0003 gate still silently disabled with the suite green. That is the
  same fail-open shape this PR exists to remove, shipped inside its own fix.
  Now: no key -> pass; key with unparseable values -> FAIL closed; otherwise
  membership. All seven spellings verified.

- `grep -q` on setup()'s body matched comment text, so
  `# chown_named_volume_targets (disabled)` — the most common way code gets
  turned off — passed at 25/0 with every named volume left root-owned.
  Anchored to a real call at line start.

Also replaced a fixed `grep -A5` window for the always_run assertion. It was
pre-existing and fails closed, but it produced a spurious FAIL whenever the
hook block grew by two lines, which is exactly what testing the block-form
stages does. It now reads the same extracted hook block as the stage check.

Both mutations recorded in the suite headers.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 tests/test-gitignore-agents-reinclusion.sh | 55 ++++++++++++++++++----
 tests/test-volume-chown-guard.sh           |  7 ++-
 2 files changed, 52 insertions(+), 10 deletions(-)

diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index fe00c40..1a25e1a 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -6,6 +6,17 @@
 # warning). The live file is untracked, so the probe is the guard for a fact
 # no hermetic test over committed files can see; this suite guards the probe.
 #
+# Verified (ADR-0005 §2), review round: the first cut of the stage check parsed
+# only the FLOW spelling, so the YAML block form
+#     stages:
+#       - manual
+# yielded an empty match and took the "no stages: key" pass — the ADR-0003 gate
+# still silently disabled, suite green. All seven spellings now behave:
+# [manual]/[commit-msg]/block -manual/bare `stages:` FAIL; [pre-commit]/[commit]/
+# block -pre-commit PASS. Also replaced a fixed `grep -A5` window for
+# always_run, which produced a spurious FAIL whenever the hook block grew by two
+# lines (mutation runs 2026-08-04).
+#
 # Verified (ADR-0005 §2), audit round: adding `stages: [manual]` to the hook in
 # .pre-commit-config.yaml left this suite at 14 passed / 0 failed while a commit
 # with a broken live .gitignore went through clean (rc 0; rc 1 with the hook
@@ -89,8 +100,6 @@ assert_false "a directory outside any repo is not reported green" \
 # Wiring: a probe only guards if its consumers run it.
 assert_true "the pre-commit local hook runs the probe" \
     grep -q 'entry: dev/check-gitignore-agents' "$DEV_BASE/.pre-commit-config.yaml"
-assert_true "the hook runs even when no files match" \
-    bash -c "grep -A5 'id: gitignore-agents-reinclusion' '$DEV_BASE/.pre-commit-config.yaml' | grep -q 'always_run: true'"
 # ...and runs at the COMMIT stage. Greps for `entry:` and `always_run:` say
 # nothing about when the hook fires: adding `stages: [manual]` left this suite
 # at 14/0 while a commit with a broken live .gitignore went through clean (rc 0
@@ -100,15 +109,43 @@ assert_true "the hook runs even when no files match" \
 hook_block="$(awk '/id: gitignore-agents-reinclusion/{f=1} f&&/^      - id: /&&!/gitignore-agents-reinclusion/{exit} f' \
     "$DEV_BASE/.pre-commit-config.yaml")"
 assert_nonempty "the hook block was found in .pre-commit-config.yaml" "$hook_block"
-hook_stages="$(grep -oP '^\s*stages:\s*\K.*' <<<"$hook_block" || true)"
-if [ -z "$hook_stages" ]; then
+# Against the extracted block, not a fixed `grep -A5` window: adding two lines
+# to the hook pushed always_run out of that window and produced a spurious FAIL
+# on an unrelated edit.
+assert_true "the hook runs even when no files match" \
+    grep -qE '^[[:space:]]*always_run:[[:space:]]*true' <<<"$hook_block"
+# A `stages:` key can be written flow-style (`stages: [manual]`) or block-style
+# (`stages:` then indented `- manual` lines). The first cut parsed only the flow
+# form, so the block form yielded an EMPTY match and took the "no stages: key"
+# pass — the gate still silently disabled, suite green. Distinguish "no key"
+# from "key present, values unreadable", and fail closed on the latter.
+if ! grep -qE '^[[:space:]]*stages:' <<<"$hook_block"; then
     _pass "the hook is not restricted off the commit stage (no stages: key)"
-elif grep -qE '(^|[^a-z-])(pre-commit|commit)([^a-z-]|$)' <<<"$hook_stages"; then
-    _pass "the hook's stages include the commit stage: $hook_stages"
 else
-    _fail "the hook runs at the commit stage" \
-        "stages: $hook_stages excludes pre-commit, so the ADR-0003 gate never" \
-        "fires on a real commit — silently, with this suite green."
+    stage_vals="$(awk '
+        /^[[:space:]]*stages:/ {
+            v = $0; sub(/^[[:space:]]*stages:[[:space:]]*/, "", v)
+            if (v != "") print v
+            blk = 1; next
+        }
+        blk {
+            if ($0 ~ /^[[:space:]]*-[[:space:]]*/) {
+                v = $0; sub(/^[[:space:]]*-[[:space:]]*/, "", v); print v; next
+            }
+            blk = 0
+        }
+    ' <<<"$hook_block" | tr -d "[],\"'" | tr ' ' '\n' | grep -v '^$' || true)"
+    if [ -z "$stage_vals" ]; then
+        _fail "the hook runs at the commit stage" \
+            "a stages: key is present but no values could be parsed —" \
+            "failing closed rather than assuming it is harmless."
+    elif grep -qxE '(pre-commit|commit)' <<<"$stage_vals"; then
+        _pass "the hook's stages include the commit stage: $(tr '\n' ' ' <<<"$stage_vals")"
+    else
+        _fail "the hook runs at the commit stage" \
+            "stages: $(tr '\n' ' ' <<<"$stage_vals") excludes pre-commit, so the" \
+            "ADR-0003 gate never fires on a real commit — silently, suite green."
+    fi
 fi
 assert_true "setup-worktree warns through the same probe" \
     grep -q 'check-gitignore-agents' "$DEV_BASE/dev/setup-worktree"
diff --git a/tests/test-volume-chown-guard.sh b/tests/test-volume-chown-guard.sh
index 802011a..ca1f6ed 100755
--- a/tests/test-volume-chown-guard.sh
+++ b/tests/test-volume-chown-guard.sh
@@ -21,6 +21,11 @@
 #   5. `chown -R` is post-order, the invariant the guard rests on: an interrupted
 #      run leaves the mount point unchowned, so it can't be read as completed
 #   6. the dev/devcontainer driver line still matches the lib's function
+# Verified (ADR-0005 §2), review round: `grep -q` on the setup() body matched
+# COMMENT text, so `# chown_named_volume_targets (disabled)` — the most common
+# way code gets turned off — passed at 25/0. Now anchored to a real call at the
+# start of a line (mutation run 2026-08-04).
+#
 # Verified (ADR-0005 §2), audit round — two mutations, BOTH 21 passed / 0 failed
 # before these assertions existed (and `tests/run-all` exit 0):
 #   - deleting `chown_named_volume_targets` from setup() (dev/devcontainer:835)
@@ -180,7 +185,7 @@ assert_true "dev/devcontainer drives the lib's function with (vscode, vscode, /h
 setup_body="$(awk '/^setup\(\) \{/,/^\}/' "$DEV_BASE/dev/devcontainer")"
 assert_nonempty "setup() body extracted from dev/devcontainer" "$setup_body"
 assert_true "setup() calls chown_named_volume_targets on every cold start" \
-    grep -q 'chown_named_volume_targets' <<<"$setup_body"
+    grep -qE '^[[:space:]]*chown_named_volume_targets\b' <<<"$setup_body"
 
 # The executed injection line, read rather than restated: `sh -c <script> <argv0>
 # <args...>` puts the first operand in $0, so without it the first mount point

From a11ee10b06e29efbe1e07861c14bda5dc8136d61 Mon Sep 17 00:00:00 2001
From: dlovell <dlovell@gmail.com>
Date: Tue, 4 Aug 2026 17:43:07 +0000
Subject: [PATCH 3/6] fix(guards): strip YAML comments before reading hook
 stages
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Content-Transfer-Encoding: 8bit

Third fail-open in this PR, same class as the first two, found by the third
review round.

The stage parser tokenized the whole line including YAML comments, so:

    stages: [manual]  # run via pre-commit run --hook-stage manual

passed at 16/0 with the ADR-0003 gate fully disabled — "pre-commit" from the
COMMENT satisfied the membership test. That is not a contrived fixture: the
natural thing to write when moving a hook to manual is a note saying how to
invoke it, and that sentence contains the token. The block form failed the
same way.

Also `tr -d ','` glued `[pre-commit,manual]` — legitimate config that does
fire on commit — into the single token `pre-commitmanual` and spuriously
FAILed. Wrong direction to be dangerous, but it would misfire on a real edit.

Both fixed in the same pipeline: strip `[[:space:]]#.*$` first, then map
commas to newlines instead of deleting them.

Ten spellings now verified and recorded in the header, up from seven.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 tests/test-gitignore-agents-reinclusion.sh | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index 1a25e1a..e993b31 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -6,6 +6,17 @@
 # warning). The live file is untracked, so the probe is the guard for a fact
 # no hermetic test over committed files can see; this suite guards the probe.
 #
+# Verified (ADR-0005 §2), third round: the parser tokenized YAML COMMENTS.
+#     stages: [manual]  # run via pre-commit run --hook-stage manual
+# passed at 16/0 with the gate fully disabled, because "pre-commit" from the
+# comment landed in the value set — and that sentence is the natural comment to
+# write when moving a hook to manual. Same for the block form. Also
+# `stages: [pre-commit,manual]` (legitimate, fires on commit) was glued into one
+# token by `tr -d ','` and spuriously FAILed. Ten spellings now verified:
+# [manual], [commit-msg], block -manual, bare `stages:`, and either form with a
+# pre-commit-naming comment all FAIL; [pre-commit], [commit], block -pre-commit
+# and [pre-commit,manual] all pass (mutation runs 2026-08-04).
+#
 # Verified (ADR-0005 §2), review round: the first cut of the stage check parsed
 # only the FLOW spelling, so the YAML block form
 #     stages:
@@ -122,6 +133,11 @@ assert_true "the hook runs even when no files match" \
 if ! grep -qE '^[[:space:]]*stages:' <<<"$hook_block"; then
     _pass "the hook is not restricted off the commit stage (no stages: key)"
 else
+    # The pipeline matters: strip YAML comments FIRST (an inline comment on a
+    # `stages:` line naturally mentions pre-commit — "run via pre-commit run
+    # --hook-stage manual" — and tokenizing it re-enabled the pass), and map
+    # commas to newlines rather than deleting them (deleting glued
+    # `[pre-commit,manual]` into one token and failed a legitimate config).
     stage_vals="$(awk '
         /^[[:space:]]*stages:/ {
             v = $0; sub(/^[[:space:]]*stages:[[:space:]]*/, "", v)
@@ -134,7 +150,11 @@ else
             }
             blk = 0
         }
-    ' <<<"$hook_block" | tr -d "[],\"'" | tr ' ' '\n' | grep -v '^$' || true)"
+    ' <<<"$hook_block" \
+        | sed 's/[[:space:]]#.*$//' \
+        | tr -d "[]\"'" \
+        | tr ', ' '\n\n' \
+        | grep -v '^$' || true)"
     if [ -z "$stage_vals" ]; then
         _fail "the hook runs at the commit stage" \
             "a stages: key is present but no values could be parsed —" \

From 8e33b4173b736c1882581b7ea9f10ce916a49bd9 Mon Sep 17 00:00:00 2001
From: dlovell <dlovell@gmail.com>
Date: Tue, 4 Aug 2026 18:13:40 +0000
Subject: [PATCH 4/6] test: one normalizer for reading bash sources, and fix
 every sibling
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Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fourth round on this PR, and the first that addresses the cause rather than
the instance.

The structural fault is visible in the files themselves: each round anchored
exactly the assertion a reviewer had demonstrated and left every sibling of
the same kind untouched.

  test-gitignore-agents-reinclusion.sh   :127 :133 anchored   :171 :178 bare
  test-volume-chown-guard.sh             :188 anchored        :176 bare

:171 and :176 are precisely the two holes the scoped audit then found live on
this branch — the branch titled "guard the wiring, not just the unit" passed
at 16/0 and 25/0 with the wiring commented out. :178 is the same class and
had never been tested.

So this adds tests/lib/shellsrc.sh — a normalizer for bash sources, the third
such helper after tests/lib/dockerfile.sh (#87) and tests/lib/workflow-paths.sh
(#93), each created by the PR that needed it — and migrates ALL THREE
assertions, not the two that were demonstrated.

assert_shell_wired strips comments before matching, so "a commented-out call
is not wiring" holds by construction rather than by each author remembering
an anchor.

One bug worth recording: the first cut piped into `grep -q`, which exits on
first match; sed then dies of SIGPIPE and pipefail reports 141, turning a
successful match into a FAIL. Fail-closed, but wrong. It captures first now.

Repo-wide migration of the other ~10 suites that parse bash sources is
deliberately NOT here; that is the audit's separate disposal.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 tests/lib/shellsrc.sh                      | 55 ++++++++++++++++++++++
 tests/test-gitignore-agents-reinclusion.sh | 15 ++++--
 tests/test-volume-chown-guard.sh           | 11 ++++-
 3 files changed, 75 insertions(+), 6 deletions(-)
 create mode 100644 tests/lib/shellsrc.sh

diff --git a/tests/lib/shellsrc.sh b/tests/lib/shellsrc.sh
new file mode 100644
index 0000000..95de1f4
--- /dev/null
+++ b/tests/lib/shellsrc.sh
@@ -0,0 +1,55 @@
+# shellcheck shell=bash
+# Shared reading of bash SOURCES for the guards that assert wiring — "production
+# actually calls this" — rather than behaviour.
+#
+# Same rationale as tests/lib/dockerfile.sh and tests/lib/workflow-paths.sh: the
+# hand-rolled form fails OPEN, so there is one implementation and a fix lands
+# everywhere. Here the hand-rolled form is `grep -q '<literal>' dev/foo`, which
+# matches the literal inside a COMMENT. Commenting a call out is the most common
+# way code gets disabled, so the assertion stays green precisely when the wiring
+# it guards has been turned off.
+#
+# Proven three times on this repo: `# chown_named_volume_targets (disabled)`
+# passed the setup() check at 25/0; a commented-out `check-gitignore-agents`
+# call passed the setup-worktree wiring check at 16/0; and prefixing the
+# volume-perms driver line with `# disabled for now: ` passed at 21/0 — all with
+# `tests/run-all` green.
+#
+# Comment stripping is deliberately naive: a `#` at line start or after
+# whitespace ends the line. It can therefore truncate a line whose `#` sits
+# inside a quoted string. That direction is safe — the pattern then fails to
+# match and the assertion goes RED, never green — but if you hit a false FAIL on
+# such a line, match a shorter prefix of it rather than reaching back for a raw
+# `grep` on the unstripped file.
+
+# shell_strip_comments <file>...
+#
+# Emit the file with comments removed, so a match means live code.
+shell_strip_comments() {
+    sed -e 's/^[[:space:]]*#.*$//' -e 's/[[:space:]]#.*$//' "$@"
+}
+
+# assert_shell_wired <label> <file> <pattern> [grep-mode]
+#
+# The pattern must appear in the file's LIVE code. grep-mode defaults to -F
+# (fixed string); pass -E for a regex.
+assert_shell_wired() {
+    local label="$1" file="$2" pattern="$3" mode="${4:--F}"
+    if [ ! -f "$file" ]; then
+        _fail "$label" "no such file: $file"
+        return
+    fi
+    # Capture first rather than piping into `grep -q`: -q exits on the first
+    # match, `sed` then dies of SIGPIPE, and `pipefail` reports 141 for the whole
+    # pipeline — so a SUCCESSFUL match read as a failure. Fail-closed, but wrong.
+    local live
+    live="$(shell_strip_comments "$file")"
+    if grep -q "$mode" -- "$pattern" <<<"$live"; then
+        _pass "$label"
+    else
+        _fail "$label" \
+            "not present in the live (non-comment) code of $file:" \
+            "  $pattern" \
+            "a commented-out call is not wiring."
+    fi
+}
diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index e993b31..ada13be 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -45,9 +45,16 @@
 # .gitignore, dev/check-gitignore-agents exits 1 and
 # `pre-commit run gitignore-agents-reinclusion` fails; restoring the template
 # stanza turns both green (mutation run 2026-08-02).
+# Verified (ADR-0005 §2), fourth round: BOTH setup-worktree wiring greps matched
+# commented-out code. Commenting the probe call passed at 16/0 (ADR-0003's
+# worktree probe never runs); commenting the ls-files gate — never tested before
+# — passed too. Rounds two and three anchored the hook-block assertions and left
+# these. Now via tests/lib/shellsrc.sh (mutation runs 2026-08-04).
+#
 set -euo pipefail
 
 . "$(dirname "$(readlink -f "$0")")/lib/harness.sh"
+. "$(dirname "$(readlink -f "$0")")/lib/shellsrc.sh"
 
 DEV_BASE="$(cd "$(dirname "$(readlink -f "$0")")/.." && pwd)"
 check="$DEV_BASE/dev/check-gitignore-agents"
@@ -167,15 +174,15 @@ else
             "ADR-0003 gate never fires on a real commit — silently, suite green."
     fi
 fi
-assert_true "setup-worktree warns through the same probe" \
-    grep -q 'check-gitignore-agents' "$DEV_BASE/dev/setup-worktree"
+assert_shell_wired "setup-worktree warns through the same probe" \
+    "$DEV_BASE/dev/setup-worktree" "check-gitignore-agents"
 # ...but only where ADR-0003's convention is in force. setup-worktree runs on
 # every `devcontainer up` in a non-main worktree for ANY project, so an
 # ungated warning is per-start noise in consumer repos that simply ignore
 # .claude/ — and its "commits will be blocked" claim is false there, since the
 # hard gate is this repo's .pre-commit-config.yaml.
-assert_true "the setup-worktree warning is gated on the repo tracking .claude/agents" \
-    grep -q 'ls-files -- .claude/agents' "$DEV_BASE/dev/setup-worktree"
+assert_shell_wired "the setup-worktree warning is gated on the repo tracking .claude/agents" \
+    "$DEV_BASE/dev/setup-worktree" "ls-files -- .claude/agents"
 assert_true "the extensionless shellcheck hook covers the probe script" \
     bash -c "grep -F '^dev/(' '$DEV_BASE/.pre-commit-config.yaml' | grep -q 'check-gitignore-agents'"
 
diff --git a/tests/test-volume-chown-guard.sh b/tests/test-volume-chown-guard.sh
index ca1f6ed..074464a 100755
--- a/tests/test-volume-chown-guard.sh
+++ b/tests/test-volume-chown-guard.sh
@@ -36,9 +36,16 @@
 #     mount point becomes $0 and is silently never chowned.
 #   (mutation runs 2026-08-04)
 #
+# Verified (ADR-0005 §2), fourth round: `grep -qF` on the driver line matched
+# THROUGH a comment, so prefixing it with `# disabled for now: ` passed at 25/0
+# with the chown never running. Round two had anchored the sibling assertion
+# three lines away and left this one — the per-assertion fix that caused four
+# rounds. Now via tests/lib/shellsrc.sh (mutation run 2026-08-04).
+#
 set -euo pipefail
 
 . "$(dirname "$(readlink -f "$0")")/lib/harness.sh"
+. "$(dirname "$(readlink -f "$0")")/lib/shellsrc.sh"
 
 DEV_BASE="$(cd "$(dirname "$(readlink -f "$0")")/.." && pwd)"
 
@@ -172,8 +179,8 @@ fi
 # chown_named_volume_targets injects the lib into the container and appends this
 # exact line; a rename on either side would otherwise fail only at runtime.
 driver='dev_chown_volume_targets vscode vscode /home/vscode "$@"'
-assert_true "dev/devcontainer drives the lib's function with (vscode, vscode, /home/vscode, \$@)" \
-    grep -qF "$driver" "$DEV_BASE/dev/devcontainer"
+assert_shell_wired "dev/devcontainer drives the lib's function with (vscode, vscode, /home/vscode, \$@)" \
+    "$DEV_BASE/dev/devcontainer" "$driver"
 
 # ---- 6a. the wiring: setup() actually calls it, with the argv0 operand ----
 # Pinning the driver line proves the lib is driven correctly IF it runs. It does

From 8a9b1a574461ee96b276ff1a4eb9db08f2caa1d4 Mon Sep 17 00:00:00 2001
From: dlovell <dlovell@gmail.com>
Date: Tue, 4 Aug 2026 18:38:28 +0000
Subject: [PATCH 5/6] =?UTF-8?q?test:=20finish=20the=20sweep=20=E2=80=94=20?=
 =?UTF-8?q?one=20stripper,=20one=20extractor,=20every=20read=20through=20t?=
 =?UTF-8?q?hem?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Round 4 claimed to fix every sibling and did not. Review found two more, both
green: a comment on the `stages:` KEY line (the parser's own sed required
whitespace before the `#`, which the awk had already eaten), and the bare grep
for the `dc exec ... sh -c "$script"` line — the ONE line that runs the
injected script — which read the raw file and then extracted the argv0 out of
comment text.

That is the fifth and sixth instance of this class in this PR, so this round
stops fixing instances. All four remaining raw reads in these two suites now
go through shell_strip_comments, and setup_body goes through
shell_function_body instead of a seventh hand-rolled range. There is one
comment-stripper and one body extractor, and nothing in these files reads a
source without them.

shell_function_body moves here from #118, where it did not belong — the
normalizer should be complete in the PR that introduces it.

Also from review:
- assert_shell_wired PASSED on an empty pattern (`grep -qF -- ""` matches
  every line) and treated a multi-line pattern as an OR. Both are what an
  extracted pattern looks like when its extraction broke. Both now fail.
- The header claimed "a match means live code". It does not: it means the text
  is not in a comment. `if false; then ...; fi` and
  `echo "skipping <name>"` both satisfy these assertions with the wiring dead.
  Recorded as accepted limits of grep-over-source, with the alternative named.
- The `ls-files -- .claude/agents` pin false-FAILed on an ordinary requote.
  Quoting-tolerant now — a guard that reddens on a no-op reformat trains
  people to edit the test.

Both halves of the amended §2 pair now hold in both suites.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 tests/lib/shellsrc.sh                      | 41 ++++++++++++++++++++++
 tests/test-gitignore-agents-reinclusion.sh | 30 +++++++++++++---
 tests/test-volume-chown-guard.sh           | 18 ++++++++--
 3 files changed, 82 insertions(+), 7 deletions(-)

diff --git a/tests/lib/shellsrc.sh b/tests/lib/shellsrc.sh
index 95de1f4..a8d99f7 100644
--- a/tests/lib/shellsrc.sh
+++ b/tests/lib/shellsrc.sh
@@ -39,6 +39,18 @@ assert_shell_wired() {
         _fail "$label" "no such file: $file"
         return
     fi
+    # An empty pattern matches every line, so `grep -qF -- ""` is an
+    # unconditional PASS — the fail-open this helper exists to remove. A
+    # multi-line pattern degrades to grep's OR semantics, so a garbage first
+    # line would pass on the second. Both are what an extracted-from-elsewhere
+    # pattern looks like when its extraction broke.
+    if [ -z "$pattern" ]; then
+        _fail "$label" "empty pattern — the extraction that produced it failed"
+        return
+    fi
+    case "$pattern" in
+        *$'\n'*) _fail "$label" "multi-line pattern would match as an OR: $pattern"; return ;;
+    esac
     # Capture first rather than piping into `grep -q`: -q exits on the first
     # match, `sed` then dies of SIGPIPE, and `pipefail` reports 141 for the whole
     # pipeline — so a SUCCESSFUL match read as a failure. Fail-closed, but wrong.
@@ -53,3 +65,32 @@ assert_shell_wired() {
             "a commented-out call is not wiring."
     fi
 }
+
+# shell_function_body <file> <name>
+#
+# The body of a shell function, in ONE spelling. Matches `name()` and `name ()`,
+# with the brace on that line or the next. Returns 1 — not an empty string —
+# when the function is absent, so a rename fails CLOSED instead of yielding an
+# empty body that vacuously satisfies a "does not contain X" assertion.
+#
+# The repo had six hand-rolled versions of this range in three incompatible
+# spellings (`awk '/^f\(\) \{/,/^\}/'`, `sed -n '/^f()/,/^}$/p'`, and the same
+# without the `$`). They disagree about `f ()` and about a brace on the next
+# line: reformatting `dc_up()` to `dc_up ()` — valid bash, shellcheck-clean —
+# emptied three of them and false-FAILed the assertions built on them.
+#
+# Two known edges, neither reachable in this repo today. It stops at the FIRST
+# column-0 `}`, so a body containing one inside a heredoc is truncated there;
+# and a one-liner definition captures on through the next function's closer.
+# Truncation is the unsafe direction — a NEGATIVE assertion over a truncated
+# body can pass for the wrong reason — so guard negative assertions with a
+# non-empty check on the body.
+shell_function_body() {
+    local file="$1" name="$2" body
+    body="$(awk -v fn="$name" '
+        !inb && $0 ~ "^"fn"[[:space:]]*\\([[:space:]]*\\)" { inb = 1; print; next }
+        inb { print; if ($0 ~ /^\}/) exit }
+    ' "$file")"
+    [ -n "$body" ] || return 1
+    printf '%s\n' "$body"
+}
diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index ada13be..c1fe74a 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -51,6 +51,16 @@
 # — passed too. Rounds two and three anchored the hook-block assertions and left
 # these. Now via tests/lib/shellsrc.sh (mutation runs 2026-08-04).
 #
+# Verified (ADR-0005 §2 pair), fifth round:
+#   SEMANTIC — a comment on the `stages:` KEY line, `stages: # run via
+#     pre-commit run --hook-stage manual` over a block `- manual`, was 16/0
+#     GREEN: the parser's own sed needed whitespace BEFORE the `#`, and the awk
+#     had already eaten it. One stripper now (shell_strip_comments carries the
+#     line-start rule). Also: commenting the setup-worktree gate out => red.
+#   FORM-ONLY — requoting to `ls-files -- '.claude/agents'` was a false FAIL
+#     against the fixed-string pin; the pattern is quoting-tolerant now and the
+#     suite holds at 16. (mutation runs 2026-08-04)
+#
 set -euo pipefail
 
 . "$(dirname "$(readlink -f "$0")")/lib/harness.sh"
@@ -116,16 +126,24 @@ assert_false "a directory outside any repo is not reported green" \
     bash -c "'$check' /tmp 2>/dev/null"
 
 # Wiring: a probe only guards if its consumers run it.
+# Read once, comment-stripped, and reused: a raw grep here matches a commented
+# hook just as happily as a live one.
+_precommit_live="$(shell_strip_comments "$DEV_BASE/.pre-commit-config.yaml")"
+
 assert_true "the pre-commit local hook runs the probe" \
-    grep -q 'entry: dev/check-gitignore-agents' "$DEV_BASE/.pre-commit-config.yaml"
+    grep -q 'entry: dev/check-gitignore-agents' <<<"$_precommit_live"
 # ...and runs at the COMMIT stage. Greps for `entry:` and `always_run:` say
 # nothing about when the hook fires: adding `stages: [manual]` left this suite
 # at 14/0 while a commit with a broken live .gitignore went through clean (rc 0
 # vs rc 1 with the hook restored). The gate #91/#94 exists to provide was off,
 # silently. Checked hermetically — pre-commit is not installed in the Bash-tests
 # CI job, and a skip there is the same "verification never ran" shape.
-hook_block="$(awk '/id: gitignore-agents-reinclusion/{f=1} f&&/^      - id: /&&!/gitignore-agents-reinclusion/{exit} f' \
-    "$DEV_BASE/.pre-commit-config.yaml")"
+# ONE comment-stripper for this file too. YAML and shell both use `#`, and the
+# stage parser's own `sed 's/[[:space:]]#.*$//'` required whitespace BEFORE the
+# `#` — so a comment on the `stages:` KEY line survived, because the awk had
+# already eaten the whitespace. shell_strip_comments carries the line-start rule.
+hook_block="$(shell_strip_comments "$DEV_BASE/.pre-commit-config.yaml" | awk '/id: gitignore-agents-reinclusion/{f=1} f&&/^      - id: /&&!/gitignore-agents-reinclusion/{exit} f' \
+    )"
 assert_nonempty "the hook block was found in .pre-commit-config.yaml" "$hook_block"
 # Against the extracted block, not a fixed `grep -A5` window: adding two lines
 # to the hook pushed always_run out of that window and produced a spurious FAIL
@@ -158,7 +176,6 @@ else
             blk = 0
         }
     ' <<<"$hook_block" \
-        | sed 's/[[:space:]]#.*$//' \
         | tr -d "[]\"'" \
         | tr ', ' '\n\n' \
         | grep -v '^$' || true)"
@@ -181,8 +198,11 @@ assert_shell_wired "setup-worktree warns through the same probe" \
 # ungated warning is per-start noise in consumer repos that simply ignore
 # .claude/ — and its "commits will be blocked" claim is false there, since the
 # hard gate is this repo's .pre-commit-config.yaml.
+# Quoting-tolerant: pinning the unquoted spelling as a fixed string made an
+# ordinary requote (`ls-files -- '.claude/agents'`) a false FAIL. Fail-closed,
+# but a guard that reddens on a no-op reformat trains people to edit the test.
 assert_shell_wired "the setup-worktree warning is gated on the repo tracking .claude/agents" \
-    "$DEV_BASE/dev/setup-worktree" "ls-files -- .claude/agents"
+    "$DEV_BASE/dev/setup-worktree" "ls-files -- [\"']?\.claude/agents[\"']?" -E
 assert_true "the extensionless shellcheck hook covers the probe script" \
     bash -c "grep -F '^dev/(' '$DEV_BASE/.pre-commit-config.yaml' | grep -q 'check-gitignore-agents'"
 
diff --git a/tests/test-volume-chown-guard.sh b/tests/test-volume-chown-guard.sh
index 074464a..4151711 100755
--- a/tests/test-volume-chown-guard.sh
+++ b/tests/test-volume-chown-guard.sh
@@ -42,6 +42,15 @@
 # three lines away and left this one — the per-assertion fix that caused four
 # rounds. Now via tests/lib/shellsrc.sh (mutation run 2026-08-04).
 #
+# Verified (ADR-0005 §2 pair), fifth round:
+#   SEMANTIC — prefixing the ONE `dc exec ... sh -c "$script"` line with
+#     `# disabled while debugging: ` was 25/0 GREEN. That bare grep read the raw
+#     file, so the argv0 was then extracted out of the comment text while the
+#     injected script never ran. Now stripped first => 23/2.
+#   FORM-ONLY — `setup() {` -> `setup () {` (valid bash, shellcheck-clean) was
+#     23/2 FALSE-FAIL against the hand-rolled awk range; via
+#     shell_function_body it holds at 25. (mutation runs 2026-08-04)
+#
 set -euo pipefail
 
 . "$(dirname "$(readlink -f "$0")")/lib/harness.sh"
@@ -189,7 +198,8 @@ assert_shell_wired "dev/devcontainer drives the lib's function with (vscode, vsc
 # 21/0 and `tests/run-all` at exit 0 while every named volume stayed root-owned.
 # Same one-directional shape as #95 — the suite composed its own invocation
 # instead of reading the executed one.
-setup_body="$(awk '/^setup\(\) \{/,/^\}/' "$DEV_BASE/dev/devcontainer")"
+setup_body="$(shell_function_body "$DEV_BASE/dev/devcontainer" setup || true)"
+setup_body="$(shell_strip_comments <<<"$setup_body")"
 assert_nonempty "setup() body extracted from dev/devcontainer" "$setup_body"
 assert_true "setup() calls chown_named_volume_targets on every cold start" \
     grep -qE '^[[:space:]]*chown_named_volume_targets\b' <<<"$setup_body"
@@ -197,7 +207,11 @@ assert_true "setup() calls chown_named_volume_targets on every cold start" \
 # The executed injection line, read rather than restated: `sh -c <script> <argv0>
 # <args...>` puts the first operand in $0, so without it the first mount point
 # is swallowed and silently never chowned.
-exec_line="$(grep -oP 'dc exec .*sh -c "\$script".*' "$DEV_BASE/dev/devcontainer" | head -1 || true)"
+# Comment-stripped: this bare grep read the raw file, so prefixing the ONE line
+# that executes the injected script with `# disabled while debugging: ` left the
+# suite at 25/0 — the argv0 was then extracted out of the comment text.
+_dc_live="$(shell_strip_comments "$DEV_BASE/dev/devcontainer")"
+exec_line="$(grep -oP 'dc exec .*sh -c "\$script".*' <<<"$_dc_live" | head -1 || true)"
 assert_nonempty "the injection line was found in dev/devcontainer" "$exec_line"
 argv0="$(grep -oP 'sh -c "\$script"\s+\K[^"\s$]+' <<<"$exec_line" || true)"
 assert_nonempty "the injection passes an argv0 before the mount points" "$argv0"

From 2275548bc9402d789168c739b7629e62f8ae883a Mon Sep 17 00:00:00 2001
From: t <t@t>
Date: Tue, 4 Aug 2026 19:43:38 +0000
Subject: [PATCH 6/6] test: the sweep missed three more; stop claiming it is
 complete
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Third false "every sibling" claim on this PR, found the same way as the first
two — by someone else looking.

- tests/test-gitignore-agents-reinclusion.sh:206 still read the RAW config,
  twelve lines below the last assertion round 5 fixed, with the stripped copy
  already in scope. Commenting out the entire `shellcheck (extensionless)`
  hook left it PASSING while dev/check-gitignore-agents was linted by nothing.
  It now reads $_precommit_live in this shell — a `bash -c` subshell does not
  inherit it — and fails closed on a missing files: pattern.

- The stage check failed closed on unreadable VALUES and open on unreadable
  KEYS: `"stages": [manual]` is honoured by pre-commit, passes yamllint, and
  was invisible to a bare `stages:` match.

- `default_stages: [manual]` at the top level moves the hook off the commit
  stage from outside the block this suite parses, so the "no stages: key"
  branch passed while the gate was off. That branch now requires
  default_stages to be absent or commit-inclusive.

shellsrc.sh's docstring still carried the "a match means live code" overclaim
round 5 said it had removed — I fixed the file header and left the function's
own. It also now records that bash starts a comment at ANY word-initial `#`,
so `:;#real_call` is dead code the stripper leaves intact: a genuine
false-pass direction, not the fail-closed truncation already documented.

No completeness claim in this commit message. Six rounds is enough evidence
that I cannot certify this by inspection; see #123 for the seam that would
make the question decidable instead.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 tests/lib/shellsrc.sh                      |  8 ++++-
 tests/test-gitignore-agents-reinclusion.sh | 38 ++++++++++++++++++++--
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/tests/lib/shellsrc.sh b/tests/lib/shellsrc.sh
index a8d99f7..28ad5fa 100644
--- a/tests/lib/shellsrc.sh
+++ b/tests/lib/shellsrc.sh
@@ -24,7 +24,13 @@
 
 # shell_strip_comments <file>...
 #
-# Emit the file with comments removed, so a match means live code.
+# Emit the file with `#` comments removed, so a match means the text is not in a
+# comment. NOT that it is live code — see the scope note above.
+#
+# Strips only `#` at line start or after whitespace. Bash actually begins a
+# comment at any word-initial `#`, so `:;#real_call args` is dead code this
+# leaves intact; that spelling is unnatural but it is a genuine false-pass
+# direction, not merely the fail-closed truncation documented above.
 shell_strip_comments() {
     sed -e 's/^[[:space:]]*#.*$//' -e 's/[[:space:]]#.*$//' "$@"
 }
diff --git a/tests/test-gitignore-agents-reinclusion.sh b/tests/test-gitignore-agents-reinclusion.sh
index c1fe74a..9dc1a16 100755
--- a/tests/test-gitignore-agents-reinclusion.sh
+++ b/tests/test-gitignore-agents-reinclusion.sh
@@ -51,6 +51,18 @@
 # — passed too. Rounds two and three anchored the hook-block assertions and left
 # these. Now via tests/lib/shellsrc.sh (mutation runs 2026-08-04).
 #
+# Verified (ADR-0005 §2 pair), sixth round — three more, all previously 16/0:
+#   the whole `shellcheck (extensionless)` hook commented out, files: pattern
+#     included, left "the extensionless shellcheck hook covers the probe
+#     script" PASSING while the probe was linted by nothing;
+#   a QUOTED key, `"stages": [manual]` — pre-commit honours it, yamllint is
+#     clean, and the bare `stages:` match never saw it. The parser failed
+#     closed on unreadable VALUES and open on unreadable KEYS;
+#   top-level `default_stages: [manual]`, which moves the hook off the commit
+#     stage from OUTSIDE the block this suite parses, so "no stages: key"
+#     passed while the gate was off.
+#   (mutation runs 2026-08-04)
+#
 # Verified (ADR-0005 §2 pair), fifth round:
 #   SEMANTIC — a comment on the `stages:` KEY line, `stages: # run via
 #     pre-commit run --hook-stage manual` over a block `- manual`, was 16/0
@@ -155,8 +167,22 @@ assert_true "the hook runs even when no files match" \
 # form, so the block form yielded an EMPTY match and took the "no stages: key"
 # pass — the gate still silently disabled, suite green. Distinguish "no key"
 # from "key present, values unreadable", and fail closed on the latter.
-if ! grep -qE '^[[:space:]]*stages:' <<<"$hook_block"; then
-    _pass "the hook is not restricted off the commit stage (no stages: key)"
+# The key may be quoted (`"stages":`), which pre-commit honours and a bare
+# `stages:` match does not see — the parser failed closed on unreadable VALUES
+# and open on unreadable KEYS. And with no hook-level key at all, a top-level
+# `default_stages:` still moves the hook off the commit stage from outside the
+# block this suite parses.
+if ! grep -qE '^[[:space:]]*"?stages"?[[:space:]]*:' <<<"$hook_block"; then
+    _default_stages="$(grep -oP '^default_stages[[:space:]]*:[[:space:]]*\K.*' <<<"$_precommit_live" || true)"
+    if [ -z "$_default_stages" ]; then
+        _pass "the hook is not restricted off the commit stage (no stages: key)"
+    elif grep -qE '(^|[^a-z-])(pre-commit|commit)([^a-z-]|$)' <<<"$_default_stages"; then
+        _pass "no hook stages:; top-level default_stages includes commit: $_default_stages"
+    else
+        _fail "the hook runs at the commit stage" \
+            "no hook-level stages:, but top-level default_stages: $_default_stages" \
+            "excludes pre-commit, so the ADR-0003 gate never fires on a commit."
+    fi
 else
     # The pipeline matters: strip YAML comments FIRST (an inline comment on a
     # `stages:` line naturally mentions pre-commit — "run via pre-commit run
@@ -203,8 +229,14 @@ assert_shell_wired "setup-worktree warns through the same probe" \
 # but a guard that reddens on a no-op reformat trains people to edit the test.
 assert_shell_wired "the setup-worktree warning is gated on the repo tracking .claude/agents" \
     "$DEV_BASE/dev/setup-worktree" "ls-files -- [\"']?\.claude/agents[\"']?" -E
+# Read from the stripped config, and in THIS shell: a `bash -c` subshell does
+# not inherit $_precommit_live. Commenting out the whole shellcheck hook — its
+# files: pattern included — used to leave this PASSING while the probe script
+# was no longer linted at all.
+_shellcheck_files="$(grep -F '^dev/(' <<<"$_precommit_live" || true)"
+assert_nonempty "the extensionless shellcheck hook has a files: pattern" "$_shellcheck_files"
 assert_true "the extensionless shellcheck hook covers the probe script" \
-    bash -c "grep -F '^dev/(' '$DEV_BASE/.pre-commit-config.yaml' | grep -q 'check-gitignore-agents'"
+    grep -q 'check-gitignore-agents' <<<"$_shellcheck_files"
 
 echo ""
 finish