From a647053dcf7a7088ab7e976e57509284742a2518 Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:00:46 -0400
Subject: [PATCH 1/7] =?UTF-8?q?ci(scope):=20narrow=20#494=20invariant=20?=
 =?UTF-8?q?=E2=80=94=20changed=20tests=20join=20windows=20lane,=20not=20fu?=
 =?UTF-8?q?ll=20matrix?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

full_matrix fired on 15/15 sampled PRs because any tests/** change forced it,
costing ~25 runner-minutes each. A changed test file now always joins the
scoped windows lane (covering the #482 OS-specific failure class per-file)
and still runs on ubuntu 22/24 via targeted_tests; the residual macOS /
windows-node-22 cross-product is covered on every push to next.

Also narrows WINDOWS_HINTS from 6 substrings (102/633 files, a ~10-minute
scoped lane) to windows/win32/shell/path — the dropped hints (workflow,
install, hook) are either platform-independent lint tests or already covered
by fullMatrix rules.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 scripts/ci-test-scope.cjs                     | 31 ++++++---
 scripts/run-cross-platform-tests.cjs          | 67 -------------------
 tests/ci-test-scope.test.cjs                  | 34 +++++++---
 ...cjs => graphify-auto-update.slow.test.cjs} |  0
 ...er-migration-install.integration.test.cjs} |  0
 ...> prompt-injection-scan.security.test.cjs} |  0
 ... read-injection-scanner.security.test.cjs} |  0
 tests/run-cross-platform-tests.test.cjs       | 46 -------------
 ...cjs => secret-scan-lint.security.test.cjs} |  0
 ...curity-prompt-injection.security.test.cjs} |  0
 ...st.cjs => security-scan.security.test.cjs} |  0
 11 files changed, 47 insertions(+), 131 deletions(-)
 delete mode 100644 scripts/run-cross-platform-tests.cjs
 rename tests/{graphify-auto-update.test.cjs => graphify-auto-update.slow.test.cjs} (100%)
 rename tests/{installer-migration-install-integration.test.cjs => installer-migration-install.integration.test.cjs} (100%)
 rename tests/{prompt-injection-scan.test.cjs => prompt-injection-scan.security.test.cjs} (100%)
 rename tests/{read-injection-scanner.test.cjs => read-injection-scanner.security.test.cjs} (100%)
 delete mode 100644 tests/run-cross-platform-tests.test.cjs
 rename tests/{secret-scan-lint.test.cjs => secret-scan-lint.security.test.cjs} (100%)
 rename tests/{security-prompt-injection.test.cjs => security-prompt-injection.security.test.cjs} (100%)
 rename tests/{security-scan.test.cjs => security-scan.security.test.cjs} (100%)

diff --git a/scripts/ci-test-scope.cjs b/scripts/ci-test-scope.cjs
index c90ffb485..fa78344b4 100644
--- a/scripts/ci-test-scope.cjs
+++ b/scripts/ci-test-scope.cjs
@@ -169,11 +169,11 @@ const RULES = [
       path.includes('prompt-injection-scan') ||
       path.startsWith('tests/fixtures/adversarial/security/'),
     tests: [
-      'tests/secret-scan-lint.test.cjs',
-      'tests/prompt-injection-scan.test.cjs',
-      'tests/security-prompt-injection.test.cjs',
-      'tests/read-injection-scanner.test.cjs',
-      'tests/security-scan.test.cjs',
+      'tests/secret-scan-lint.security.test.cjs',
+      'tests/prompt-injection-scan.security.test.cjs',
+      'tests/security-prompt-injection.security.test.cjs',
+      'tests/read-injection-scanner.security.test.cjs',
+      'tests/security-scan.security.test.cjs',
     ],
   },
   {
@@ -308,7 +308,13 @@ function addAll(set, values) {
   for (const value of values) set.add(value);
 }
 
-const WINDOWS_HINTS = ['windows', 'path', 'shell', 'workflow', 'install', 'hook'];
+// Windows-sensitive filename hints — deliberately narrow. 'workflow',
+// 'install', and 'hook' were dropped from this list: workflow-lint tests are
+// platform-independent YAML/policy checks, and the installer/hooks RULES set
+// fullMatrix=true, so the full Windows lane already runs when those paths
+// change. The old six-hint list pulled 102 of ~633 test files into the scoped
+// windows lane, turning it into a ~10-minute job on every PR.
+const WINDOWS_HINTS = ['windows', 'win32', 'shell', 'path'];
 const isWindowsHint = s => WINDOWS_HINTS.some(k => s.toLowerCase().includes(k));
 
 function classify(files) {
@@ -343,10 +349,15 @@ function classify(files) {
 
     if (file.startsWith('tests/') && file.endsWith('.test.cjs')) {
       targeted.add(file);
-      fullMatrix = true;
-      if (isWindowsHint(file)) {
-        windows.add(file);
-      }
+      // #494 invariant, narrowed: a changed test must still be exercised on
+      // the divergent OS before merge, but at per-file cost — it ALWAYS joins
+      // the scoped windows lane instead of triggering the three full parity
+      // lanes. (full_matrix fired on 15/15 sampled PRs because test-driven
+      // PRs always touch tests/, costing ~25 runner-minutes each.) Changed
+      // tests already run on ubuntu-22 and ubuntu-24 via targeted_tests; the
+      // residual macOS / windows-node-22 cross-product is covered by the full
+      // matrix on every push to next.
+      windows.add(file);
     }
 
     for (const rule of RULES) {
diff --git a/scripts/run-cross-platform-tests.cjs b/scripts/run-cross-platform-tests.cjs
deleted file mode 100644
index 31a8f4a8e..000000000
--- a/scripts/run-cross-platform-tests.cjs
+++ /dev/null
@@ -1,67 +0,0 @@
-'use strict';
-
-const { spawnSync } = require('child_process');
-const { ExitError, runMain } = require('./lib/cli-exit.cjs');
-
-const CROSS_PLATFORM_TEST_REASON = Object.freeze({
-  PASS: 'pass',
-  TEST_FAILURE: 'test_failure',
-  INFRA_FAILURE: 'infra_failure',
-  UNKNOWN_FAILURE: 'unknown_failure',
-});
-
-function classify(exitCode, output) {
-  if (exitCode === 0) return CROSS_PLATFORM_TEST_REASON.PASS;
-  if (exitCode === 2 || /infrastructure failure|worktree\.Construct/i.test(output)) {
-    return CROSS_PLATFORM_TEST_REASON.INFRA_FAILURE;
-  }
-  if (/\bFAIL\b|\d+\s+failures?\)/i.test(output)) {
-    return CROSS_PLATFORM_TEST_REASON.TEST_FAILURE;
-  }
-  return CROSS_PLATFORM_TEST_REASON.UNKNOWN_FAILURE;
-}
-
-function runCrossPlatformTests(options = {}, deps = {}) {
-  const {
-    base = 'next',
-    head = 'HEAD',
-    source = '.',
-    targets = 'linux,macos',
-    cwd = process.cwd(),
-  } = options;
-  const runner = deps.spawnSync || spawnSync;
-
-  const args = ['--targets', targets, '--base', base, '--head', head, '--source', source];
-  const result = runner('gsd-test', args, { cwd, encoding: 'utf8' });
-
-  const stdout = result.stdout || '';
-  const stderr = result.stderr || '';
-  const output = `${stdout}\n${stderr}`;
-  const exitCode = Number(result.status ?? 1);
-  const reason = classify(exitCode, output);
-
-  return {
-    ok: exitCode === 0,
-    reason,
-    exitCode,
-    command: ['gsd-test', ...args].join(' '),
-    stdout,
-    stderr,
-  };
-}
-
-if (require.main === module) {
-  function main() {
-    const result = runCrossPlatformTests();
-    const line = `[cross-platform-tests] reason=${result.reason} exit=${result.exitCode}`;
-    if (result.ok) {
-      process.stdout.write(`${line}\n`);
-      return 0;
-    }
-    process.stderr.write(`${line}\n`);
-    throw new ExitError(result.exitCode);
-  }
-  runMain(main);
-}
-
-module.exports = { CROSS_PLATFORM_TEST_REASON, runCrossPlatformTests };
diff --git a/tests/ci-test-scope.test.cjs b/tests/ci-test-scope.test.cjs
index 08c67f723..59c77a831 100644
--- a/tests/ci-test-scope.test.cjs
+++ b/tests/ci-test-scope.test.cjs
@@ -279,18 +279,36 @@ describe('ci-test-scope.cjs', () => {
   });
 });
 
-describe('ci-test-scope superset invariant (#494)', () => {
-  // Facet A: any tests/** change → full_matrix === true
-  test('A1: a specific changed test file forces full_matrix', () => {
+describe('ci-test-scope superset invariant (#494, narrowed)', () => {
+  // Facet A (narrowed): a changed test file no longer triggers the full
+  // parity matrix — instead it must ALWAYS run on the scoped windows lane,
+  // so OS-specific breakage in the changed test (the #482 class) is still
+  // exercised pre-merge. Ubuntu 22/24 coverage comes via targeted_tests.
+  test('A1: a changed test file joins the windows scoped lane without full_matrix', () => {
     const result = scopeFor(['tests/bug-1974-context-exhaustion-record.test.cjs']);
-    assert.strictEqual(result.full_matrix, true,
-      `expected full_matrix=true for tests/** change, got: ${JSON.stringify(result)}`);
+    assert.strictEqual(result.full_matrix, false,
+      `expected full_matrix=false for a tests/**-only change, got: ${JSON.stringify(result)}`);
+    assert.ok(result.targeted_tests.includes('tests/bug-1974-context-exhaustion-record.test.cjs'),
+      `expected the changed test in targeted_tests, got: ${JSON.stringify(result.targeted_tests)}`);
+    assert.ok(result.windows_tests.includes('tests/bug-1974-context-exhaustion-record.test.cjs'),
+      `expected the changed test in windows_tests, got: ${JSON.stringify(result.windows_tests)}`);
   });
 
-  test('A2: any tests/** path forces full_matrix', () => {
+  test('A2: a changed test file with no windows hint still joins the windows lane', () => {
+    // commands.test.cjs matches none of the WINDOWS_HINTS substrings — the
+    // unconditional changed-test → windows lane rule must include it anyway.
+    const result = scopeFor(['tests/commands.test.cjs']);
+    assert.strictEqual(result.full_matrix, false);
+    assert.ok(result.windows_tests.includes('tests/commands.test.cjs'),
+      `expected hint-less changed test in windows_tests, got: ${JSON.stringify(result.windows_tests)}`);
+  });
+
+  test('A3: a deleted/nonexistent test path falls back to the unit token, no full_matrix', () => {
     const result = scopeFor(['tests/some-new.test.cjs']);
-    assert.strictEqual(result.full_matrix, true,
-      `expected full_matrix=true for tests/** change, got: ${JSON.stringify(result)}`);
+    assert.strictEqual(result.full_matrix, false);
+    // The nonexistent file is filtered by existingTests(); with nothing left,
+    // the #408 fallback applies so the targeted lane still runs something.
+    assert.deepStrictEqual(result.targeted_tests, ['unit']);
   });
 
   // Facet B: commands/**, agents/** → code_changed AND docs-parity selected
diff --git a/tests/graphify-auto-update.test.cjs b/tests/graphify-auto-update.slow.test.cjs
similarity index 100%
rename from tests/graphify-auto-update.test.cjs
rename to tests/graphify-auto-update.slow.test.cjs
diff --git a/tests/installer-migration-install-integration.test.cjs b/tests/installer-migration-install.integration.test.cjs
similarity index 100%
rename from tests/installer-migration-install-integration.test.cjs
rename to tests/installer-migration-install.integration.test.cjs
diff --git a/tests/prompt-injection-scan.test.cjs b/tests/prompt-injection-scan.security.test.cjs
similarity index 100%
rename from tests/prompt-injection-scan.test.cjs
rename to tests/prompt-injection-scan.security.test.cjs
diff --git a/tests/read-injection-scanner.test.cjs b/tests/read-injection-scanner.security.test.cjs
similarity index 100%
rename from tests/read-injection-scanner.test.cjs
rename to tests/read-injection-scanner.security.test.cjs
diff --git a/tests/run-cross-platform-tests.test.cjs b/tests/run-cross-platform-tests.test.cjs
deleted file mode 100644
index d55bb30a8..000000000
--- a/tests/run-cross-platform-tests.test.cjs
+++ /dev/null
@@ -1,46 +0,0 @@
-const { test, describe } = require('node:test');
-const assert = require('node:assert/strict');
-
-const { CROSS_PLATFORM_TEST_REASON, runCrossPlatformTests } = require('../scripts/run-cross-platform-tests.cjs');
-
-describe('run cross-platform tests module', () => {
-  test('returns pass reason on zero exit', () => {
-    const out = runCrossPlatformTests({}, {
-      spawnSync: () => ({ status: 0, stdout: 'ok', stderr: '' }),
-    });
-    assert.strictEqual(out.ok, true);
-    assert.strictEqual(out.reason, CROSS_PLATFORM_TEST_REASON.PASS);
-    assert.ok(out.command.includes('--base next'));
-  });
-
-  test('classifies infrastructure failure', () => {
-    const out = runCrossPlatformTests({}, {
-      spawnSync: () => ({ status: 2, stdout: '', stderr: 'infrastructure failure' }),
-    });
-    assert.strictEqual(out.ok, false);
-    assert.strictEqual(out.reason, CROSS_PLATFORM_TEST_REASON.INFRA_FAILURE);
-  });
-
-  test('classifies test failure from FAIL marker', () => {
-    const out = runCrossPlatformTests({}, {
-      spawnSync: () => ({ status: 1, stdout: 'linux FAIL 1/2 tests (1 failures)', stderr: '' }),
-    });
-    assert.strictEqual(out.ok, false);
-    assert.strictEqual(out.reason, CROSS_PLATFORM_TEST_REASON.TEST_FAILURE);
-  });
-
-  test('passes options through to command args', () => {
-    let cmd = null;
-    let args = null;
-    runCrossPlatformTests({ base: 'main', head: 'abc123', source: '/tmp/x', targets: 'linux' }, {
-      spawnSync: (c, a) => {
-        cmd = c;
-        args = a;
-        return { status: 0, stdout: '', stderr: '' };
-      },
-    });
-
-    assert.strictEqual(cmd, 'gsd-test');
-    assert.deepStrictEqual(args, ['--targets', 'linux', '--base', 'main', '--head', 'abc123', '--source', '/tmp/x']);
-  });
-});
diff --git a/tests/secret-scan-lint.test.cjs b/tests/secret-scan-lint.security.test.cjs
similarity index 100%
rename from tests/secret-scan-lint.test.cjs
rename to tests/secret-scan-lint.security.test.cjs
diff --git a/tests/security-prompt-injection.test.cjs b/tests/security-prompt-injection.security.test.cjs
similarity index 100%
rename from tests/security-prompt-injection.test.cjs
rename to tests/security-prompt-injection.security.test.cjs
diff --git a/tests/security-scan.test.cjs b/tests/security-scan.security.test.cjs
similarity index 100%
rename from tests/security-scan.test.cjs
rename to tests/security-scan.security.test.cjs

From cd5db1f8db0e759cdb71b64484f3f5c4306547ed Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:01:00 -0400
Subject: [PATCH 2/7] test(suites): seed security/slow/integration suites via
 measured retags
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Renames (git mv) with all references updated (ci-test-scope RULES,
windows-parity allowlist, test-file-count allowlist, docs in 6 locales):

- 5 scanner tests -> *.security.test.cjs — the 'Run security tests' CI step
  ran zero files since the suite taxonomy landed; it is now honest.
- graphify-auto-update -> *.slow.test.cjs (36s, slowest file in the suite;
  e2e gsd-tools spawns) — runs on full-matrix lanes and push to next.
- installer-migration-install-integration -> *.integration.test.cjs
  (13s; an integration test by its own name).

Coverage gate measured after retags: 88.55% lines (gate 70%).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 CONTEXT.md                                    |  2 +-
 docs/FEATURES.md                              |  2 +-
 docs/TESTING-SUITES.md                        | 48 ++++++++--
 docs/USER-GUIDE.md                            |  2 +-
 docs/explanation/security-model.md            |  2 +-
 docs/ja-JP/FEATURES.md                        |  2 +-
 docs/ja-JP/USER-GUIDE.md                      |  2 +-
 docs/ja-JP/explanation/security-model.md      |  2 +-
 docs/ko-KR/FEATURES.md                        |  2 +-
 docs/ko-KR/USER-GUIDE.md                      |  2 +-
 docs/ko-KR/explanation/security-model.md      |  2 +-
 docs/pt-BR/USER-GUIDE.md                      |  2 +-
 docs/pt-BR/explanation/security-model.md      |  2 +-
 docs/zh-CN/FEATURES.md                        |  2 +-
 docs/zh-CN/USER-GUIDE.md                      |  2 +-
 docs/zh-CN/explanation/security-model.md      |  2 +-
 scripts/lint-test-file-count.allowlist.json   |  6 +-
 tests/fixtures/adversarial/security/README.md |  2 +-
 tests/lint-regression-test-names.test.cjs     | 95 +++++++++++++++++++
 tests/policy-lint-shallow-checkout.test.cjs   |  2 +-
 tests/prompt-injection-scan.security.test.cjs |  2 +-
 tests/windows-test-parity-guard.test.cjs      |  6 +-
 22 files changed, 161 insertions(+), 30 deletions(-)
 create mode 100644 tests/lint-regression-test-names.test.cjs

diff --git a/CONTEXT.md b/CONTEXT.md
index bd78058ed..2f909f29a 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -521,7 +521,7 @@ The canonical lint infrastructure adopted in ADR 452 (`docs/adr/452-eslint-lint-
 `DEFECT.SUPERSEDED-CONCURRENT-PRS.fix-forward=close superseded PRs via gh api PATCH state=closed; do not comment on self-authored PRs (k101); the link to the merged PR makes supersession discoverable in PR history`
 
 `DEFECT.PROMPT-INJECTION-SCAN-COLLISION.symptom=custom XML element name in agent .md file matches scripts/scan-prompt-injection regex; legitimate agent vocabulary trips the security gate`
-`DEFECT.PROMPT-INJECTION-SCAN-COLLISION.examples=#3309 added a bare 'human' element (angle-bracket-wrapped) for verify-block harvesting; tests/prompt-injection-scan.test.cjs flags angle-bracket-wrapped names matching system|assistant|human (open or close form)`
+`DEFECT.PROMPT-INJECTION-SCAN-COLLISION.examples=#3309 added a bare 'human' element (angle-bracket-wrapped) for verify-block harvesting; tests/prompt-injection-scan.security.test.cjs flags angle-bracket-wrapped names matching system|assistant|human (open or close form)`
 `DEFECT.PROMPT-INJECTION-SCAN-COLLISION.detect=any new bare <system|assistant|human|user> tag in agents/*.md`
 `DEFECT.PROMPT-INJECTION-SCAN-COLLISION.fix-forward=hyphenate the tag (<human-check>, <assistant-prompt>) — scanner regex matches bare names only`
 
diff --git a/docs/FEATURES.md b/docs/FEATURES.md
index 7b6b0cbfa..952cc4503 100644
--- a/docs/FEATURES.md
+++ b/docs/FEATURES.md
@@ -1293,7 +1293,7 @@ PreToolUse hook that scans Write/Edit calls targeting `.planning/` for injection
 **3. Workflow Guard Hook** (`gsd-workflow-guard.js`)
 PreToolUse hook that detects when Claude attempts file edits outside a GSD workflow context. Advises using `/gsd-quick` or `/gsd-fast` instead of direct edits. Configurable via `hooks.workflow_guard` (default: false).
 
-**4. CI-Ready Injection Scanner** (`prompt-injection-scan.test.cjs`)
+**4. CI-Ready Injection Scanner** (`prompt-injection-scan.security.test.cjs`)
 Test suite that scans all agent, workflow, and command files for embedded injection vectors.
 
 **Requirements:**
diff --git a/docs/TESTING-SUITES.md b/docs/TESTING-SUITES.md
index 8705a030e..b5f31e053 100644
--- a/docs/TESTING-SUITES.md
+++ b/docs/TESTING-SUITES.md
@@ -29,6 +29,23 @@ Examples:
 
 The suite-suffix convention was chosen over a directory layout (`tests/security/`) so the 545+ existing test files don't need to move. Existing files all classify as `unit` until someone explicitly retags them.
 
+## Regression tests
+
+**Do not create new top-level `tests/bug-NNNN-*.test.cjs` files.** Add the
+regression case to the owning module's main test file instead (e.g. a
+`describe('regressions')` block in `tests/<module>.test.cjs`).
+
+`node --test` spawns one child process per FILE, so file count — not test
+count — is the unit of CI overhead, and it is worst on Windows lanes where
+every spawn is Defender-scanned. The 2026-06 CI audit found 244 one-off
+`bug-*` files (~38% of the suite). That population is grandfathered in
+`scripts/lint-regression-test-names.allowlist.json` and enforced by an
+identity ratchet (`npm run lint:regression-names`, part of `npm run lint:ci`):
+
+- A **new** `bug-*` file fails CI — fold it into the owning module's file.
+- **Deleting/consolidating** a grandfathered file requires pruning its
+  allowlist entry, so the baseline only ever shrinks.
+
 ## Running suites locally
 
 ```bash
@@ -53,6 +70,12 @@ node scripts/run-tests.cjs --files "tests/command-contract.test.cjs tests/core.t
 node scripts/run-tests.cjs --files-from .ci-selected-tests.txt
 ```
 
+`npm run test:affected` (scripts/run-affected-tests.cjs) is a **local-only**
+convenience that selects tests via the `require()` dependency graph of your
+working-tree diff. CI does not use it — CI selection is the rule table in
+`scripts/ci-test-scope.cjs`, which is the authoritative mapping. If the two
+disagree, trust (and fix) the rule table.
+
 Unknown suites exit non-zero with the list of valid suites. Empty suites (e.g. `--suite security` before any security-tagged file exists) exit `0` with a `no tests in suite "..."` notice on stderr so CI lanes don't go red while a suite is being populated.
 
 ## CI matrix
@@ -72,14 +95,27 @@ The `Tests` workflow runs every PR through a scoped gate generated by
   smoke set. They are for confidence on the affected surface, not for counting
   tests.
 
-The default PR gate runs the broad `unit`, `integration`, and `security` suites
-once on Ubuntu / Node 24, scoped smoke on Ubuntu / Node 22, scoped
-Windows/path/shell tests on Windows / Node 24, and unit coverage once on Ubuntu /
-Node 24. PRs touching workflow, package, test-runner, install, release, or
+The default PR gate runs the broad `unit` (under the c8 coverage gate),
+`integration`, and `security` suites once on Ubuntu / Node 24, scoped smoke on
+Ubuntu / Node 22, and scoped Windows-sensitive tests on Windows / Node 24.
+**Every changed test file always joins the Windows scoped lane** (the #494
+invariant, narrowed): a modified test is exercised on the divergent OS before
+merge at per-file cost, without paying for the three full parity lanes.
+
+PRs touching workflow, package, test-runner, install, release, or
 Windows-sensitive surfaces also run the full parity matrix on macOS and the
 older Windows runtime, plus `install` and `slow` on the primary Ubuntu lane.
-Coverage stays single-lane because multiplying coverage across OS/runtime lanes
-adds cost without improving the threshold signal.
+Everything (including the full parity matrix) runs on every push to `next`,
+which covers the residual macOS / Windows-Node-22 cross-product for scoped PRs.
+
+Coverage runs inside the Ubuntu / Node 24 full lane (not a separate job — that
+duplicated the entire unit run) and stays single-lane because multiplying
+coverage across OS/runtime lanes adds cost without improving the threshold
+signal. Note the gate's deliberate blind spot: it measures
+`gsd-core/bin/lib/*.cjs` only — `scripts/`, `hooks/`, and `bin/` are
+unenforced, and `stryker.config.mjs` additionally excludes ~48% of lib lines
+from mutation testing (see the UNMUTATED list there). Widening either gate is
+tracked work, not an accident to "fix" silently by raising thresholds.
 
 To inspect the scope locally:
 
diff --git a/docs/USER-GUIDE.md b/docs/USER-GUIDE.md
index e83cfae8f..33e894224 100644
--- a/docs/USER-GUIDE.md
+++ b/docs/USER-GUIDE.md
@@ -386,7 +386,7 @@ GSD generates markdown files that become LLM system prompts. This means any user
 - `gsd-prompt-guard.js` — Scans Write/Edit calls to `.planning/` for injection patterns (always active, advisory-only)
 - `gsd-workflow-guard.js` — Warns on file edits outside GSD workflow context (opt-in via `hooks.workflow_guard`)
 
-**CI Scanner:** `prompt-injection-scan.test.cjs` scans all agent, workflow, and command files for embedded injection vectors.
+**CI Scanner:** `prompt-injection-scan.security.test.cjs` scans all agent, workflow, and command files for embedded injection vectors.
 
 ---
 
diff --git a/docs/explanation/security-model.md b/docs/explanation/security-model.md
index 53115c7ca..b55ef2395 100644
--- a/docs/explanation/security-model.md
+++ b/docs/explanation/security-model.md
@@ -158,7 +158,7 @@ injected instructions in untrusted content — catching cases where an attacker
 has embedded instructions in a file that GSD is about to incorporate into an
 agent's context.
 
-**CI scanner.** `prompt-injection-scan.test.cjs` scans all agent, workflow,
+**CI scanner.** `prompt-injection-scan.security.test.cjs` scans all agent, workflow,
 and command files for embedded injection vectors as part of the test suite.
 This catches injection attempts in the GSD source itself — for example, a
 supply-chain attack that modified a workflow file to add a role-override
diff --git a/docs/ja-JP/FEATURES.md b/docs/ja-JP/FEATURES.md
index eda9783a7..0109debc3 100644
--- a/docs/ja-JP/FEATURES.md
+++ b/docs/ja-JP/FEATURES.md
@@ -1227,7 +1227,7 @@ fix(03-01): correct auth token expiry
 **3. ワークフローガードフック**（`gsd-workflow-guard.js`）
 Claude が GSD ワークフローコンテキスト外でファイル編集を試行した際に検出する PreToolUse フック。直接編集の代わりに `/gsd-quick` や `/gsd-fast` の使用をアドバイスします。`hooks.workflow_guard`（デフォルト: false）で設定可能です。
 
-**4. CI 対応インジェクションスキャナー**（`prompt-injection-scan.test.cjs`）
+**4. CI 対応インジェクションスキャナー**（`prompt-injection-scan.security.test.cjs`）
 すべてのエージェント、ワークフロー、コマンドファイルに埋め込まれたインジェクションベクターをスキャンするテストスイート。
 
 **要件:**
diff --git a/docs/ja-JP/USER-GUIDE.md b/docs/ja-JP/USER-GUIDE.md
index 0982dce70..264953822 100644
--- a/docs/ja-JP/USER-GUIDE.md
+++ b/docs/ja-JP/USER-GUIDE.md
@@ -369,7 +369,7 @@ GSD は LLM のシステムプロンプトになるマークダウンファイ
 - `gsd-prompt-guard.js` — `.planning/` への Write/Edit 呼び出しでインジェクションパターンをスキャンする（常時有効、アドバイザリーのみ）
 - `gsd-workflow-guard.js` — GSD ワークフローコンテキスト外でのファイル編集を警告する（`hooks.workflow_guard` 経由でオプトイン）
 
-**CI スキャナー:** `prompt-injection-scan.test.cjs` はすべてのエージェント、ワークフロー、コマンドファイルに埋め込まれたインジェクションベクターをスキャンします。
+**CI スキャナー:** `prompt-injection-scan.security.test.cjs` はすべてのエージェント、ワークフロー、コマンドファイルに埋め込まれたインジェクションベクターをスキャンします。
 
 ---
 
diff --git a/docs/ja-JP/explanation/security-model.md b/docs/ja-JP/explanation/security-model.md
index afc5c3d93..be3014d07 100644
--- a/docs/ja-JP/explanation/security-model.md
+++ b/docs/ja-JP/explanation/security-model.md
@@ -73,7 +73,7 @@ GSD Core はプロンプトインジェクションを 3 つのレベルで対
 
 **ランタイムフック：`gsd-read-injection-scanner.js`。** このフックはすべての Read ツール呼び出しの出力で発火します。GSD がエージェントのコンテキストに組み込もうとしているファイルの *読み取ったばかりのコンテンツ* をスキャンし、攻撃者が命令を埋め込んでいるケースをキャッチします。
 
-**CI スキャナー。** `prompt-injection-scan.test.cjs` はテストスイートの一部として、すべてのエージェント、ワークフロー、コマンドファイルに埋め込まれたインジェクションベクターをスキャンします。これは GSD ソース自体でのインジェクション試みをキャッチします——たとえば、ワークフローファイルにロールオーバーライド命令を追加するよう変更したサプライチェーン攻撃。
+**CI スキャナー。** `prompt-injection-scan.security.test.cjs` はテストスイートの一部として、すべてのエージェント、ワークフロー、コマンドファイルに埋め込まれたインジェクションベクターをスキャンします。これは GSD ソース自体でのインジェクション試みをキャッチします——たとえば、ワークフローファイルにロールオーバーライド命令を追加するよう変更したサプライチェーン攻撃。
 
 ### Read Injection Scanner vs Prompt Guard
 
diff --git a/docs/ko-KR/FEATURES.md b/docs/ko-KR/FEATURES.md
index c393e8982..be2f5d268 100644
--- a/docs/ko-KR/FEATURES.md
+++ b/docs/ko-KR/FEATURES.md
@@ -1131,7 +1131,7 @@ fix(03-01): correct auth token expiry
 **3. 워크플로우 가드 훅** (`gsd-workflow-guard.js`)
 Claude가 GSD 워크플로우 컨텍스트 밖에서 파일 편집을 시도하는 것을 감지하는 PreToolUse 훅입니다. 직접 편집 대신 `/gsd-quick` 또는 `/gsd-fast` 사용을 권고합니다. `hooks.workflow_guard`로 구성 가능합니다(기본값: false).
 
-**4. CI 준비 주입 스캐너** (`prompt-injection-scan.test.cjs`)
+**4. CI 준비 주입 스캐너** (`prompt-injection-scan.security.test.cjs`)
 모든 에이전트, 워크플로우, 명령어 파일에서 포함된 주입 벡터를 스캔하는 테스트 스위트입니다.
 
 **요구사항.**
diff --git a/docs/ko-KR/USER-GUIDE.md b/docs/ko-KR/USER-GUIDE.md
index 0370fd753..a2f8c01aa 100644
--- a/docs/ko-KR/USER-GUIDE.md
+++ b/docs/ko-KR/USER-GUIDE.md
@@ -369,7 +369,7 @@ GSD는 LLM 시스템 프롬프트가 되는 마크다운 파일을 생성합니
 - `gsd-prompt-guard.js` — `.planning/`에 대한 Write/Edit 호출에서 인젝션 패턴 스캔 (항상 활성, 자문 전용)
 - `gsd-workflow-guard.js` — GSD 워크플로우 컨텍스트 외부에서 파일 편집 시 경고 (`hooks.workflow_guard`를 통한 옵트인)
 
-**CI 스캐너:** `prompt-injection-scan.test.cjs`는 모든 에이전트, 워크플로우, 명령어 파일에서 삽입된 인젝션 벡터를 스캔합니다.
+**CI 스캐너:** `prompt-injection-scan.security.test.cjs`는 모든 에이전트, 워크플로우, 명령어 파일에서 삽입된 인젝션 벡터를 스캔합니다.
 
 ---
 
diff --git a/docs/ko-KR/explanation/security-model.md b/docs/ko-KR/explanation/security-model.md
index 644e61a3e..4cbd1c2a6 100644
--- a/docs/ko-KR/explanation/security-model.md
+++ b/docs/ko-KR/explanation/security-model.md
@@ -79,7 +79,7 @@ GSD Core는 세 가지 수준에서 프롬프트 인젝션을 다룬다.
 
 **런타임 훅: `gsd-read-injection-scanner.js`.** 이 훅은 모든 Read 도구 호출의 출력에서 실행된다. 방금 읽은 *콘텐츠*를 신뢰할 수 없는 콘텐츠의 주입된 지시 사항으로 스캔한다 — 공격자가 GSD가 에이전트 컨텍스트에 통합하려는 파일에 지시 사항을 내장한 경우를 잡아낸다.
 
-**CI 스캐너.** `prompt-injection-scan.test.cjs`는 테스트 스위트의 일부로 내장된 인젝션 벡터가 있는지 모든 에이전트, 워크플로우, 명령 파일을 스캔한다. 이는 GSD 소스 자체의 인젝션 시도를 잡아낸다 — 예를 들어 워크플로우 파일을 수정하여 역할 재정의 지시 사항을 추가하는 공급망 공격.
+**CI 스캐너.** `prompt-injection-scan.security.test.cjs`는 테스트 스위트의 일부로 내장된 인젝션 벡터가 있는지 모든 에이전트, 워크플로우, 명령 파일을 스캔한다. 이는 GSD 소스 자체의 인젝션 시도를 잡아낸다 — 예를 들어 워크플로우 파일을 수정하여 역할 재정의 지시 사항을 추가하는 공급망 공격.
 
 ### 읽기 인젝션 스캐너 vs 프롬프트 가드
 
diff --git a/docs/pt-BR/USER-GUIDE.md b/docs/pt-BR/USER-GUIDE.md
index 6b63cf518..e0b269607 100644
--- a/docs/pt-BR/USER-GUIDE.md
+++ b/docs/pt-BR/USER-GUIDE.md
@@ -369,7 +369,7 @@ O GSD gera arquivos markdown que se tornam prompts de sistema de LLM. Isso signi
 - `gsd-prompt-guard.js` — Verifica chamadas Write/Edit para `.planning/` em busca de padrões de injeção (sempre ativo, somente consultivo)
 - `gsd-workflow-guard.js` — Avisa sobre edições de arquivos fora do contexto do workflow GSD (opt-in via `hooks.workflow_guard`)
 
-**Scanner de CI:** `prompt-injection-scan.test.cjs` verifica todos os arquivos de agentes, workflows e comandos em busca de vetores de injeção incorporados.
+**Scanner de CI:** `prompt-injection-scan.security.test.cjs` verifica todos os arquivos de agentes, workflows e comandos em busca de vetores de injeção incorporados.
 
 ---
 
diff --git a/docs/pt-BR/explanation/security-model.md b/docs/pt-BR/explanation/security-model.md
index fa866c152..1b1308090 100644
--- a/docs/pt-BR/explanation/security-model.md
+++ b/docs/pt-BR/explanation/security-model.md
@@ -168,7 +168,7 @@ de ser lido* em busca de instruções injetadas em conteúdo não confiável —
 capturando casos em que um atacante incorporou instruções em um arquivo que o
 GSD está prestes a incorporar ao contexto de um agente.
 
-**Scanner de CI.** `prompt-injection-scan.test.cjs` escaneia todos os arquivos
+**Scanner de CI.** `prompt-injection-scan.security.test.cjs` escaneia todos os arquivos
 de agente, workflow e comando em busca de vetores de injeção embutidos como
 parte do conjunto de testes. Isso detecta tentativas de injeção no próprio
 código-fonte do GSD — por exemplo, um ataque de cadeia de suprimentos que
diff --git a/docs/zh-CN/FEATURES.md b/docs/zh-CN/FEATURES.md
index e72be9ca6..993df8f55 100644
--- a/docs/zh-CN/FEATURES.md
+++ b/docs/zh-CN/FEATURES.md
@@ -1244,7 +1244,7 @@ PreToolUse 钩子，扫描针对 `.planning/` 的 Write/Edit 调用中的注入
 **3. 工作流守护钩子**（`gsd-workflow-guard.js`）
 PreToolUse 钩子，检测 Claude 在 GSD 工作流上下文之外尝试文件编辑的情况。建议使用 `/gsd-quick` 或 `/gsd-fast` 替代直接编辑。可通过 `hooks.workflow_guard` 配置（默认：false）。
 
-**4. CI 就绪注入扫描器**（`prompt-injection-scan.test.cjs`）
+**4. CI 就绪注入扫描器**（`prompt-injection-scan.security.test.cjs`）
 扫描所有智能体、工作流和命令文件中嵌入注入向量的测试套件。
 
 **需求：**
diff --git a/docs/zh-CN/USER-GUIDE.md b/docs/zh-CN/USER-GUIDE.md
index 51610bf8b..3c7c0acea 100644
--- a/docs/zh-CN/USER-GUIDE.md
+++ b/docs/zh-CN/USER-GUIDE.md
@@ -368,7 +368,7 @@ GSD 生成的 Markdown 文件会成为 LLM 系统提示。这意味着流入规
 - `gsd-prompt-guard.js` — 扫描写入 `.planning/` 的 Write/Edit 调用中的注入模式（始终活跃，仅建议）
 - `gsd-workflow-guard.js` — 对 GSD 工作流上下文之外的文件编辑发出警告（通过 `hooks.workflow_guard` 选择性启用）
 
-**CI 扫描器：** `prompt-injection-scan.test.cjs` 扫描所有 agent、工作流和命令文件中的嵌入式注入向量。
+**CI 扫描器：** `prompt-injection-scan.security.test.cjs` 扫描所有 agent、工作流和命令文件中的嵌入式注入向量。
 
 ---
 
diff --git a/docs/zh-CN/explanation/security-model.md b/docs/zh-CN/explanation/security-model.md
index 9250066bb..cc7c0810a 100644
--- a/docs/zh-CN/explanation/security-model.md
+++ b/docs/zh-CN/explanation/security-model.md
@@ -73,7 +73,7 @@ GSD Core 在三个层面应对提示注入。
 
 **运行时钩子：`gsd-read-injection-scanner.js`。** 该钩子在每次 Read 工具调用的输出时触发。它扫描*刚刚读取的内容*中在不可信内容中注入的指令——捕获攻击者在 GSD 即将纳入代理上下文的文件中嵌入指令的情况。
 
-**CI 扫描器。** `prompt-injection-scan.test.cjs` 作为测试套件的一部分，扫描所有代理、工作流和命令文件中嵌入的注入向量。这能捕获 GSD 源代码本身的注入尝试——例如，修改工作流文件以添加角色覆盖指令的供应链攻击。
+**CI 扫描器。** `prompt-injection-scan.security.test.cjs` 作为测试套件的一部分，扫描所有代理、工作流和命令文件中嵌入的注入向量。这能捕获 GSD 源代码本身的注入尝试——例如，修改工作流文件以添加角色覆盖指令的供应链攻击。
 
 ### 读取注入扫描器与提示守卫的对比
 
diff --git a/scripts/lint-test-file-count.allowlist.json b/scripts/lint-test-file-count.allowlist.json
index 215bec00d..c61b9c64c 100644
--- a/scripts/lint-test-file-count.allowlist.json
+++ b/scripts/lint-test-file-count.allowlist.json
@@ -26,7 +26,7 @@
     "graphify": {
       "files": [
         "bug-622-graphify-optional-graph-html.test.cjs",
-        "graphify-auto-update.test.cjs",
+        "graphify-auto-update.slow.test.cjs",
         "graphify-query.test.cjs",
         "graphify-visualization.test.cjs",
         "graphify.test.cjs"
@@ -82,8 +82,8 @@
     },
     "security": {
       "files": [
-        "security-prompt-injection.test.cjs",
-        "security-scan.test.cjs",
+        "security-prompt-injection.security.test.cjs",
+        "security-scan.security.test.cjs",
         "security.test.cjs"
       ],
       "issue": "TBD"
diff --git a/tests/fixtures/adversarial/security/README.md b/tests/fixtures/adversarial/security/README.md
index ab1ac2a3e..23de998d1 100644
--- a/tests/fixtures/adversarial/security/README.md
+++ b/tests/fixtures/adversarial/security/README.md
@@ -1,7 +1,7 @@
 # Adversarial security fixtures (#3596)
 
 Reusable hostile payloads consumed by
-`tests/security-prompt-injection.test.cjs`.
+`tests/security-prompt-injection.security.test.cjs`.
 
 The fixtures here are pure data — they are loaded by the test as input
 to the production code under test (hooks, validators, sanitizers, CLI).
diff --git a/tests/lint-regression-test-names.test.cjs b/tests/lint-regression-test-names.test.cjs
new file mode 100644
index 000000000..8f30cd816
--- /dev/null
+++ b/tests/lint-regression-test-names.test.cjs
@@ -0,0 +1,95 @@
+'use strict';
+
+// Tests for scripts/lint-regression-test-names.cjs — the identity ratchet
+// that bans NEW top-level bug-NNNN test files (2026-06 CI audit). Uses the
+// script's env overrides to point at sandbox fixture dirs; never touches the
+// real tests/ directory or allowlist.
+
+const { describe, test, before, after } = require('node:test');
+const assert = require('node:assert/strict');
+const { spawnSync } = require('child_process');
+const fs = require('fs');
+const os = require('node:os');
+const path = require('path');
+const { cleanup } = require('./helpers.cjs');
+
+const ROOT = path.join(__dirname, '..');
+const SCRIPT = path.join(ROOT, 'scripts', 'lint-regression-test-names.cjs');
+
+let sandbox;
+
+function runLint({ files, allowlist }) {
+  const testsDir = path.join(sandbox, `tests-${Math.random().toString(36).slice(2)}`);
+  fs.mkdirSync(testsDir, { recursive: true });
+  for (const f of files) fs.writeFileSync(path.join(testsDir, f), '');
+  const allowlistPath = path.join(testsDir, 'allowlist.json');
+  fs.writeFileSync(allowlistPath, JSON.stringify(allowlist));
+  return spawnSync(process.execPath, [SCRIPT], {
+    cwd: ROOT,
+    encoding: 'utf8',
+    env: {
+      ...process.env,
+      GSD_LINT_REGRESSION_TESTS_DIR: testsDir,
+      GSD_LINT_REGRESSION_ALLOWLIST: allowlistPath,
+    },
+  });
+}
+
+describe('lint-regression-test-names', () => {
+  before(() => {
+    sandbox = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-lint-regression-'));
+  });
+
+  after(() => {
+    cleanup(sandbox);
+  });
+
+  test('passes when every bug-* file is grandfathered', () => {
+    const r = runLint({
+      files: ['bug-100-old.test.cjs', 'module.test.cjs'],
+      allowlist: ['bug-100-old.test.cjs'],
+    });
+    assert.strictEqual(r.status, 0, `stderr: ${r.stderr}`);
+  });
+
+  test('fails on a novel bug-* file with fold-into-module guidance', () => {
+    const r = runLint({
+      files: ['bug-100-old.test.cjs', 'bug-200-new.test.cjs'],
+      allowlist: ['bug-100-old.test.cjs'],
+    });
+    assert.notStrictEqual(r.status, 0);
+    assert.match(r.stderr, /bug-200-new\.test\.cjs/);
+    assert.match(r.stderr, /owning module/);
+  });
+
+  test('fails on a stale allowlist entry (ratchet-down enforcement)', () => {
+    const r = runLint({
+      files: ['bug-100-old.test.cjs'],
+      allowlist: ['bug-100-old.test.cjs', 'bug-300-gone.test.cjs'],
+    });
+    assert.notStrictEqual(r.status, 0);
+    assert.match(r.stderr, /bug-300-gone\.test\.cjs/);
+  });
+
+  test('ignores non-bug test files and suite-marked non-bug names', () => {
+    const r = runLint({
+      files: ['module.test.cjs', 'feature.integration.test.cjs', 'debug-1-not-a-bug.test.cjs'],
+      allowlist: [],
+    });
+    assert.strictEqual(r.status, 0, `stderr: ${r.stderr}`);
+  });
+
+  test('catches a suite-marked bug-* file too (no marker escape hatch)', () => {
+    const r = runLint({
+      files: ['bug-400-sneaky.security.test.cjs'],
+      allowlist: [],
+    });
+    assert.notStrictEqual(r.status, 0);
+    assert.match(r.stderr, /bug-400-sneaky\.security\.test\.cjs/);
+  });
+
+  test('repo baseline passes (real tests/ dir against real allowlist)', () => {
+    const r = spawnSync(process.execPath, [SCRIPT], { cwd: ROOT, encoding: 'utf8' });
+    assert.strictEqual(r.status, 0, `stderr: ${r.stderr}\nstdout: ${r.stdout}`);
+  });
+});
diff --git a/tests/policy-lint-shallow-checkout.test.cjs b/tests/policy-lint-shallow-checkout.test.cjs
index 82a96b985..303d532f0 100644
--- a/tests/policy-lint-shallow-checkout.test.cjs
+++ b/tests/policy-lint-shallow-checkout.test.cjs
@@ -12,7 +12,7 @@
  * deeper than 50, which is intentional.
  *
  * Note: security-scan.yml legitimately uses fetch-depth: 0 and is NOT covered
- * by this test (see tests/security-scan.test.cjs).
+ * by this test (see tests/security-scan.security.test.cjs).
  */
 
 const { describe, test } = require('node:test');
diff --git a/tests/prompt-injection-scan.security.test.cjs b/tests/prompt-injection-scan.security.test.cjs
index 4027bbb04..c32d98c97 100644
--- a/tests/prompt-injection-scan.security.test.cjs
+++ b/tests/prompt-injection-scan.security.test.cjs
@@ -58,7 +58,7 @@ const ALLOWLIST = new Set([
   'hooks/gsd-prompt-guard.js',                  // The prompt guard hook
   'hooks/gsd-read-injection-scanner.js',        // The read injection scanner (contains patterns)
   'tests/security.test.cjs',                    // Security tests
-  'tests/prompt-injection-scan.test.cjs',       // This file
+  'tests/prompt-injection-scan.security.test.cjs',       // This file
 ]);
 
 // Workflows that exceed the 50K strict-mode size threshold due to legitimate
diff --git a/tests/windows-test-parity-guard.test.cjs b/tests/windows-test-parity-guard.test.cjs
index ed1a8922a..fd8eb30f0 100644
--- a/tests/windows-test-parity-guard.test.cjs
+++ b/tests/windows-test-parity-guard.test.cjs
@@ -49,12 +49,12 @@ const SELF = path.basename(__filename);
 const KNOWN_OFFENDERS = Object.freeze({
   splitNewlineOnFileContent: new Set([
     'release-coverage-scope.test.cjs',
-    'secret-scan-lint.test.cjs',
-    'security-scan.test.cjs',
+    'secret-scan-lint.security.test.cjs',
+    'security-scan.security.test.cjs',
   ]),
   fenceRegexLiteralNewline: new Set([
     'bug-2995-post-install-script-paths.test.cjs',
-    'security-scan.test.cjs',
+    'security-scan.security.test.cjs',
   ]),
   frontmatterAnchorLiteralNewline: new Set([
     'bug-1967-cache-invalidation.test.cjs',

From 622e4be6d825b7d5fa09c9fd19bce38126b804fe Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:03:14 -0400
Subject: [PATCH 3/7] test(ratchet): ban new top-level bug-NNNN test files via
 identity allowlist

244 one-off bug-* files (~38% of the suite) are grandfathered in
lint-regression-test-names.allowlist.json; new ones fail lint with
fold-into-module guidance, and deletions force allowlist pruning so the
baseline only shrinks. Wired into npm run lint:ci (new single entry point
for every CI lint). Policy documented in docs/TESTING-SUITES.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 package.json                                  |   2 +
 .../lint-regression-test-names.allowlist.json | 246 ++++++++++++++++++
 scripts/lint-regression-test-names.cjs        |  78 ++++++
 3 files changed, 326 insertions(+)
 create mode 100644 scripts/lint-regression-test-names.allowlist.json
 create mode 100644 scripts/lint-regression-test-names.cjs

diff --git a/package.json b/package.json
index 050571a0e..57f6ce2ad 100644
--- a/package.json
+++ b/package.json
@@ -91,6 +91,8 @@
     "pretest:coverage": "npm run build:lib && npm run lint:skill-deps",
     "lint": "eslint . --cache --cache-location node_modules/.cache/eslint/",
     "lint:fix": "eslint . --fix",
+    "lint:ci": "eslint . && npm run lint:skill-deps && node scripts/lint-test-file-count.cjs && node scripts/lint-command-contract.cjs && node scripts/lint-pr-check-project-dir.cjs && npm run lint:legacy-name && node scripts/lint-regression-test-names.cjs",
+    "lint:regression-names": "node scripts/lint-regression-test-names.cjs",
     "lint:descriptions": "node scripts/lint-descriptions.cjs",
     "lint:skill-deps": "node scripts/lint-skill-deps.cjs",
     "lint:test-file-count": "node scripts/lint-test-file-count.cjs",
diff --git a/scripts/lint-regression-test-names.allowlist.json b/scripts/lint-regression-test-names.allowlist.json
new file mode 100644
index 000000000..f99f80a62
--- /dev/null
+++ b/scripts/lint-regression-test-names.allowlist.json
@@ -0,0 +1,246 @@
+[
+  "bug-10-semver-policy-consolidation.test.cjs",
+  "bug-130-finishinstall-opencode-testmode.test.cjs",
+  "bug-131-release-tarball-smoke-explicit-home.test.cjs",
+  "bug-14-progress-auto-flag-dropped.test.cjs",
+  "bug-167-query-meta-command.test.cjs",
+  "bug-17-askuserquestion-option-cap.test.cjs",
+  "bug-170-workflow-fallback-install-hint.test.cjs",
+  "bug-1736-local-install-commands.test.cjs",
+  "bug-1754-js-hook-guard.test.cjs",
+  "bug-1817-sh-hook-guard.test.cjs",
+  "bug-1818-unknown-flags.test.cjs",
+  "bug-1826-phases-clear-confirm.test.cjs",
+  "bug-1829-inherit-model-profile.test.cjs",
+  "bug-1834-sh-hooks-installed.test.cjs",
+  "bug-1891-file-resolution.test.cjs",
+  "bug-190-bridge-collapse.test.cjs",
+  "bug-1906-hook-relative-paths.test.cjs",
+  "bug-1908-uninstall-manifest.test.cjs",
+  "bug-1924-preserve-user-artifacts.test.cjs",
+  "bug-1967-cache-invalidation.test.cjs",
+  "bug-1974-context-exhaustion-record.test.cjs",
+  "bug-2002-offer-next-context.test.cjs",
+  "bug-2004-pr-branch-milestone.test.cjs",
+  "bug-21-state-md-template-frontmatter.test.cjs",
+  "bug-211-launcher-home-fallback.test.cjs",
+  "bug-2136-sh-hook-version.test.cjs",
+  "bug-214-phase-researcher-write-truncation-contract.test.cjs",
+  "bug-214-writer-agents-write-truncation-contract.test.cjs",
+  "bug-222-research-synthesizer-write-contract.test.cjs",
+  "bug-224-pick-stdout-capture.test.cjs",
+  "bug-2248-local-install-statusline.test.cjs",
+  "bug-2256-model-overrides-transport.test.cjs",
+  "bug-2268-parallel-discuss.test.cjs",
+  "bug-2344-read-guard-claudecode-env.test.cjs",
+  "bug-2346-agent-read-loop-guards.test.cjs",
+  "bug-2351-intel-kilo-layout.test.cjs",
+  "bug-2376-opencode-windows-home-path.test.cjs",
+  "bug-2384-post-merge-deletion-audit.test.cjs",
+  "bug-2388-plan-phase-no-branch-rename.test.cjs",
+  "bug-2396-makefile-test-priority.test.cjs",
+  "bug-2399-commit-docs-plan-phase.test.cjs",
+  "bug-2410-stream-checkpoint-heartbeats.test.cjs",
+  "bug-2418-antigravity-bare-path.test.cjs",
+  "bug-2419-project-researcher-agent.test.cjs",
+  "bug-2421-planner-grep-gate-hygiene.test.cjs",
+  "bug-2424-reapply-patches-baseline-detection.test.cjs",
+  "bug-2432-quick-plan-predispatch-commit.test.cjs",
+  "bug-2451-context-monitor-over-report.test.cjs",
+  "bug-2470-update-md-claude-path.test.cjs",
+  "bug-2492-context-coverage-gate.test.cjs",
+  "bug-2501-resurrection-detection.test.cjs",
+  "bug-2502-insert-phase-state-update.test.cjs",
+  "bug-2504-uat-foundation-phases.test.cjs",
+  "bug-2506-settings-profile-nonclaude-warning.test.cjs",
+  "bug-2516-inherit-model-execute-phase.test.cjs",
+  "bug-2520-read-guard-hook-subprocess-env.test.cjs",
+  "bug-2523-quick-deferred-items.test.cjs",
+  "bug-2530-valid-config-keys.test.cjs",
+  "bug-2543-gsd-slash-namespace.test.cjs",
+  "bug-2545-copilot-unreplaced-paths.test.cjs",
+  "bug-2549-2550-2552-discuss-phase-context.test.cjs",
+  "bug-2554-decimal-phase-filter.test.cjs",
+  "bug-2557-gemini-local-hook-paths.test.cjs",
+  "bug-2559-stale-search-year.test.cjs",
+  "bug-260-worktree-path-guard.test.cjs",
+  "bug-2601-inherit-model-profile.test.cjs",
+  "bug-261-worktree-force-add-guard.test.cjs",
+  "bug-2630-state-frontmatter-milestone-switch.test.cjs",
+  "bug-2638-sub-repos-canonical-location.test.cjs",
+  "bug-2643-skill-frontmatter-name.test.cjs",
+  "bug-2659-audit-open-crash.test.cjs",
+  "bug-2660-one-liner-extraction.test.cjs",
+  "bug-2661-roadmap-sync-parallel.test.cjs",
+  "bug-2686-review-fix-worktree.test.cjs",
+  "bug-2698-crlf-install.test.cjs",
+  "bug-2760-codex-install-defensive.test.cjs",
+  "bug-2769-requirements-header-variants.test.cjs",
+  "bug-2770-annotate-deps-int-coerce.test.cjs",
+  "bug-2771-user-profile-manifest.test.cjs",
+  "bug-2772-gitmodules-path-intersection.test.cjs",
+  "bug-2784-update-cache-clear-path.test.cjs",
+  "bug-279-codex-agent-mapping.test.cjs",
+  "bug-2794-opencode-model-profile-overrides.test.cjs",
+  "bug-2798-context-window-config-key.test.cjs",
+  "bug-2801-ingest-docs-handler.test.cjs",
+  "bug-2808-skill-hyphen-name.test.cjs",
+  "bug-2831-opencode-home-path-prefix.test.cjs",
+  "bug-2836-audit-open-summary-uat-drift.test.cjs",
+  "bug-2838-summary-rescue-gitignored-planning.test.cjs",
+  "bug-2839-review-fix-transactional-cleanup.test.cjs",
+  "bug-2851-workflow-bare-gsd-tools.test.cjs",
+  "bug-2866-codex-strip-no-trailing-newline.test.cjs",
+  "bug-2876-skill-frontmatter-quote.test.cjs",
+  "bug-2911-audit-open-output-shape.test.cjs",
+  "bug-2912-progress-context-authority.test.cjs",
+  "bug-2916-handle-branching-default-base.test.cjs",
+  "bug-2942-detect-custom-skills.test.cjs",
+  "bug-2943-config-get-context-window-default.test.cjs",
+  "bug-2948-spike-wrap-up-dispatch.test.cjs",
+  "bug-2949-sketch-wrap-up-dispatch.test.cjs",
+  "bug-2950-stale-command-refs.test.cjs",
+  "bug-2954-help-md-slash-command-stubs.test.cjs",
+  "bug-2957-claude-global-postinstall-message.test.cjs",
+  "bug-2969-verify-reapply-patches.test.cjs",
+  "bug-2973-profile-user-skills-path.test.cjs",
+  "bug-2979-hook-absolute-node.test.cjs",
+  "bug-2986-config-schema-mutation-killers.test.cjs",
+  "bug-2990-code-fixer-worktree-branch.test.cjs",
+  "bug-2992-check-latest-version.test.cjs",
+  "bug-2994-verify-reapply-patches-installed-path.test.cjs",
+  "bug-2995-post-install-script-paths.test.cjs",
+  "bug-2998-pristine-dir-populated.test.cjs",
+  "bug-3017-codex-hook-absolute-node.test.cjs",
+  "bug-3018-codex-discuss-fallback.test.cjs",
+  "bug-3019-help-passthrough.test.cjs",
+  "bug-3037-gemini-duplicate-commands.test.cjs",
+  "bug-3050-update-backup-eacces-nonfatal.test.cjs",
+  "bug-3054-stale-gsd-next-references.test.cjs",
+  "bug-3072-optional-sketch-findings-guard.test.cjs",
+  "bug-3083-resume-route-clear.test.cjs",
+  "bug-3086-git-create-tag-config-gate.test.cjs",
+  "bug-3087-planner-directive-language.test.cjs",
+  "bug-3096-ai-integration-phase-parallel-race.test.cjs",
+  "bug-3097-3099-executor-worktree-path-safety.test.cjs",
+  "bug-3120-secure-phase-empty-register.test.cjs",
+  "bug-3126-global-skills-base-runtime-path.test.cjs",
+  "bug-3127-state-begin-phase-idempotent.test.cjs",
+  "bug-3128-roadmap-plan-count-slug-layout.test.cjs",
+  "bug-3129-validate-commit-git-bypass.test.cjs",
+  "bug-3130-update-npx-robust-invocation.test.cjs",
+  "bug-3135-capture-backlog-workflow.test.cjs",
+  "bug-3150-stats-json-decimal-phase-gaps.test.cjs",
+  "bug-3156-plan-phase-opencode-dispatch.test.cjs",
+  "bug-3163-codex-agents-md.test.cjs",
+  "bug-3168-task-to-agent-rename.test.cjs",
+  "bug-3181-node-cellar-path.test.cjs",
+  "bug-3195-quick-resurrection-guard.test.cjs",
+  "bug-3197-gsd-tools-config-whitelist.test.cjs",
+  "bug-321-config-defaults-clone-strategy.test.cjs",
+  "bug-3212-execute-phase-stall-safe-resume.test.cjs",
+  "bug-3227-config-set-model-overrides.test.cjs",
+  "bug-3236-capture-seed-one-shot.test.cjs",
+  "bug-3242-state-update-progress-trample.test.cjs",
+  "bug-3243-dotted-command-form.test.cjs",
+  "bug-3245-codex-toml-floats.test.cjs",
+  "bug-3257-nested-plans-undercount.test.cjs",
+  "bug-3258-no-stale-gsd-intel-references.test.cjs",
+  "bug-3275-fmstr-non-string-scalars.test.cjs",
+  "bug-3285-codex-hooks-state-allowed.test.cjs",
+  "bug-3286-state-write-routing.test.cjs",
+  "bug-3288-model-catalog-install-path.test.cjs",
+  "bug-3290-intel-updater-layout-block.test.cjs",
+  "bug-33-settings-model-profile-adaptive.test.cjs",
+  "bug-3320-planner-deep-work-rules.test.cjs",
+  "bug-3321-verifier-runs-probes.test.cjs",
+  "bug-3346-codex-aot-toml-key.test.cjs",
+  "bug-3357-codex-legacy-hooks-json-migration.test.cjs",
+  "bug-3360-codex-execute-phase-worktrees.test.cjs",
+  "bug-338-local-install-settings-local-json.test.cjs",
+  "bug-3381-verify-work-workstream.test.cjs",
+  "bug-3384-secondary-defects.test.cjs",
+  "bug-3407-pristine-stale-content.test.cjs",
+  "bug-3413-shell-command-projection.test.cjs",
+  "bug-3418-progress-flag-routing.test.cjs",
+  "bug-3426-codex-windows-hooks.test.cjs",
+  "bug-3427-3433-codex-install-shape.test.cjs",
+  "bug-3430-planner-phase-contract.test.cjs",
+  "bug-3431-debug-command-yaml.test.cjs",
+  "bug-3441-path-action-projection.test.cjs",
+  "bug-3442-codex-legacy-hooks-json-migration.test.cjs",
+  "bug-3442-shim-projection-drift-guard.test.cjs",
+  "bug-3446-resume-continue-here-discovery.test.cjs",
+  "bug-3454-state-dollar-backreference-growth.test.cjs",
+  "bug-3489-complete-phase-idempotent.test.cjs",
+  "bug-3491-nested-git-worktree.test.cjs",
+  "bug-3509-path-spaces.test.cjs",
+  "bug-3516-reapply-patches-gsd-update-filter.test.cjs",
+  "bug-3521-quick-cleanup-cwd-pin.test.cjs",
+  "bug-3523-cjs-loadconfig-branching-strategy-warning.test.cjs",
+  "bug-3537-padded-id-against-unpadded-roadmap.test.cjs",
+  "bug-3541-installer-migration-prompt-user-resolution.test.cjs",
+  "bug-3542-executor-git-stash-prohibition.test.cjs",
+  "bug-3562-codex-install-skill-surface.test.cjs",
+  "bug-3566-codex-hooks-feature-canonical-key.test.cjs",
+  "bug-3571-configuration-manifest-install-path.test.cjs",
+  "bug-3582-codex-skills-materialized.test.cjs",
+  "bug-3584-runtime-slash-emitters.test.cjs",
+  "bug-3584-runtime-slash-formatter.test.cjs",
+  "bug-3588-npm-audit-clean.test.cjs",
+  "bug-3599-roadmap-get-phase-project-code-prefix.test.cjs",
+  "bug-3605-stale-research-insert-phase-agent-refs.test.cjs",
+  "bug-3608-antigravity-update-runtime-classification.test.cjs",
+  "bug-3610-installer-migration-bundled-hooks-classification.test.cjs",
+  "bug-3628-bundled-hook-classifier-whitelist.test.cjs",
+  "bug-3631-router-raw-flag.test.cjs",
+  "bug-3657-verify-reapply-patches-pristine-drift.test.cjs",
+  "bug-3659-applysurface-prune-skill-dirs.test.cjs",
+  "bug-3668-workflow-runtime-resolution.test.cjs",
+  "bug-3670-cursor-local-install-migration-lock.test.cjs",
+  "bug-3677-agent-colon-namespace-leak.test.cjs",
+  "bug-3678-executor-commit-docs-respect.test.cjs",
+  "bug-3683-command-colon-namespace-leak.test.cjs",
+  "bug-3683-command-cross-reference-invariant.test.cjs",
+  "bug-3683-workflow-colon-namespace-leak.test.cjs",
+  "bug-3689-resume-glob-nomatch.test.cjs",
+  "bug-3691-annotate-deps-plans-block-variants.test.cjs",
+  "bug-3706-ui-safety-gate-false-positives.test.cjs",
+  "bug-3707-locked-worktree-cleanup.test.cjs",
+  "bug-3727-code-review-fix-flag-dispatch.test.cjs",
+  "bug-3735-profiles-core-includes-surface.test.cjs",
+  "bug-3739-gap-checker-padded-prefix-context.test.cjs",
+  "bug-376-claude-js-hook-gsd-rewriter.test.cjs",
+  "bug-378-update-check-scoped-name.test.cjs",
+  "bug-3784-gsd-settings-model-profile-ui-omits-adaptive.test.cjs",
+  "bug-3805-fast-md-log-to-state-schema.test.cjs",
+  "bug-3808-codex-adapter-text-mode-fallback.test.cjs",
+  "bug-384-agents-runtime-aware.test.cjs",
+  "bug-397-state-preserve-executor-authored.test.cjs",
+  "bug-410-install-defaults-test-mode-guard.test.cjs",
+  "bug-416-archive-dir-null.test.cjs",
+  "bug-442-config-dir-equals-in-path.test.cjs",
+  "bug-444-resolver-local-claude-install.test.cjs",
+  "bug-447-gap-analysis-phase-req-ids.test.cjs",
+  "bug-474-clock-seam-date-determinism.test.cjs",
+  "bug-492-effort-manifest-fallback.test.cjs",
+  "bug-500-planned-phase-progress-corruption.test.cjs",
+  "bug-501-flat-phase-details-milestone-leak.test.cjs",
+  "bug-503-update-agent-antigravity-detection.test.cjs",
+  "bug-505-remove-dead-sdk-verification.test.cjs",
+  "bug-549-total-phases-overcounts-with-phase-section-heading.test.cjs",
+  "bug-557-details-summary-milestone-strip.test.cjs",
+  "bug-570-codex-leak-scanner.test.cjs",
+  "bug-571-doc-writer-fix-mode-edit-only.test.cjs",
+  "bug-580-local-sh-hook-bash-wrapper.test.cjs",
+  "bug-619-codebase-drift-gate-shim.test.cjs",
+  "bug-621-plan-phase-gap-analysis-gsd-run.test.cjs",
+  "bug-622-graphify-optional-graph-html.test.cjs",
+  "bug-630-wave-cleanup-orchestrator-root.test.cjs",
+  "bug-637-workflow-no-hardcoded-home-tool.test.cjs",
+  "bug-641-files-from-suite-token.test.cjs",
+  "bug-663-redos-roadmap-phase-parsing.test.cjs",
+  "bug-685-windowshide-spawn.test.cjs",
+  "bug-687-agy-timeout.test.cjs",
+  "bug-704-codex-launcher-path-corruption.test.cjs"
+]
diff --git a/scripts/lint-regression-test-names.cjs b/scripts/lint-regression-test-names.cjs
new file mode 100644
index 000000000..724f81b52
--- /dev/null
+++ b/scripts/lint-regression-test-names.cjs
@@ -0,0 +1,78 @@
+#!/usr/bin/env node
+'use strict';
+
+/**
+ * lint-regression-test-names.cjs — ban NEW top-level bug-NNNN test files.
+ *
+ * ## Why
+ *
+ * The 2026-06 CI audit found 244 one-off `tests/bug-NNNN-*.test.cjs` files —
+ * ~38% of the suite. `node --test` spawns one child process per FILE, so file
+ * count (not test count) is the unit of CI overhead, and it is worst on the
+ * Windows lanes where every spawn is Defender-scanned. Each regression test
+ * belongs in the owning module's main test file as a regression case (e.g. a
+ * `describe('regressions')` block in `tests/<module>.test.cjs`), where it
+ * costs zero additional processes.
+ *
+ * ## What this enforces
+ *
+ * Identity ratchet (scripts/lib/allowlist-ratchet.cjs) over basenames matching
+ * /^bug-\d+.*\.test\.cjs$/ in tests/:
+ *   - A NEW bug-* file (not in the allowlist) fails: fold the regression into
+ *     the owning module's test file instead.
+ *   - A REMOVED bug-* file with a stale allowlist entry also fails: prune the
+ *     entry from scripts/lint-regression-test-names.allowlist.json so the
+ *     baseline only ever shrinks.
+ *
+ * See docs/TESTING-SUITES.md ("Regression tests") for the placement policy.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const { assertWithinAllowlist } = require('./lib/allowlist-ratchet.cjs');
+const { ExitError, runMain } = require('./lib/cli-exit.cjs');
+
+const ROOT = path.join(__dirname, '..');
+// Env overrides exist for the lint's own tests only (sandbox fixture dirs).
+const TESTS_DIR = process.env.GSD_LINT_REGRESSION_TESTS_DIR || path.join(ROOT, 'tests');
+const ALLOWLIST_PATH =
+  process.env.GSD_LINT_REGRESSION_ALLOWLIST ||
+  path.join(__dirname, 'lint-regression-test-names.allowlist.json');
+
+const BUG_FILE_RE = /^bug-\d+.*\.test\.cjs$/;
+
+function main() {
+  const current = fs
+    .readdirSync(TESTS_DIR)
+    .filter(f => BUG_FILE_RE.test(f))
+    .sort();
+  const known = JSON.parse(fs.readFileSync(ALLOWLIST_PATH, 'utf8'));
+
+  const failures = [];
+  const { novel } = assertWithinAllowlist({
+    label: 'regression-test-names',
+    current,
+    known,
+    fail: msg => failures.push(msg),
+    pruneHint: 'edit scripts/lint-regression-test-names.allowlist.json',
+  });
+
+  if (failures.length > 0) {
+    for (const msg of failures) console.error(msg);
+    if (novel.length > 0) {
+      console.error(
+        '\nNew bug-NNNN test files are no longer accepted. Add the regression ' +
+        "case to the owning module's test file (e.g. a describe('regressions') " +
+        'block in tests/<module>.test.cjs) instead of creating a new file. ' +
+        'See docs/TESTING-SUITES.md.'
+      );
+    }
+    throw new ExitError(1);
+  }
+
+  console.log(
+    `ok lint-regression-test-names: ${current.length} grandfathered bug-* file(s), no novel offenders`
+  );
+}
+
+runMain(main);

From a869df2acffb763200a6a08aaf2dfe9966a6c75d Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:03:14 -0400
Subject: [PATCH 4/7] ci(test.yml): fold coverage into ubuntu-24 lane, add
 scripts/ floor, single lint step
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Coverage gate (test:coverage:unit) now runs inside the ubuntu/24 full lane;
  the standalone coverage job duplicated that lane's entire unit run (~4 min
  of runner time per PR). required-tests gate updated accordingly.
- New second-tier floor: c8 check-coverage --lines 55 over scripts/**
  re-slices the same V8 data (measured 65.95%) — the CI/release/lint tooling
  was previously enforced at 0%.
- Coverage artifact now excludes coverage/tmp (>1 GB of raw V8 dumps).
- lint-tests runs npm run lint:ci — one orchestrated step, identical set
  locally and in CI; drops the no-op eslint --cache flag (CI never restored
  the cache directory).
- Delete unreferenced scripts/run-cross-platform-tests.cjs (+ its test);
  document the mutation UNMUTATED blind spot (~48% of lib lines) in
  stryker.config.mjs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .github/workflows/test.yml | 101 ++++++++++++++-----------------------
 stryker.config.mjs         |   9 ++++
 2 files changed, 46 insertions(+), 64 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d95860e26..e217bd008 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -103,18 +103,12 @@ jobs:
       # lint scripts) require() the built modules — so build them explicitly.
       - name: Build runtime lib (required by lint scripts)
         run: npm run build:lib
-      - name: Lint — ESLint (source-grep + timing + no-only-tests + quality)
-        run: npx eslint . --cache --cache-location node_modules/.cache/eslint/
-      - name: Lint — skill dependency graph
-        run: npm run lint:skill-deps
-      - name: Lint — test file count per module
-        run: node scripts/lint-test-file-count.cjs
-      - name: Lint — command contract (ADR-0002)
-        run: node scripts/lint-command-contract.cjs
-      - name: Lint — PR checks use projectDir
-        run: node scripts/lint-pr-check-project-dir.cjs
-      - name: Lint — legacy directory name guard (#604)
-        run: npm run lint:legacy-name
+      # Single orchestrated lint entry point (npm run lint:ci) so local and CI
+      # always run the identical set. ESLint's --cache flag is intentionally
+      # NOT used here: CI never restores node_modules/.cache, so the flag was
+      # a no-op that only implied caching existed.
+      - name: Lint — all (ESLint, skill deps, test-file count, command contract, PR checks, legacy name, regression-test names)
+        run: npm run lint:ci
 
   test:
     name: test (${{ matrix.os }}, ${{ matrix.node-version }})
@@ -196,9 +190,36 @@ jobs:
         if: matrix.scope != 'full'
         run: node scripts/run-tests.cjs --files-from .ci-selected-tests.txt
 
-      - name: Run unit tests
+      # The unit suite runs ONCE here, under c8 with the coverage gate — the
+      # former standalone `coverage` job duplicated this lane's entire unit
+      # run (~4 min of runner time per PR) just to collect the same numbers.
+      - name: Run unit tests (coverage gate ≥70% on gsd-core/bin/lib)
         if: matrix.scope == 'full'
-        run: npm run test:unit
+        env:
+          NODE_OPTIONS: --max-old-space-size=6144
+        run: npm run test:coverage:unit
+
+      # Second-tier floor over the CI/release/lint tooling itself. Re-slices
+      # the SAME V8 coverage data left in coverage/tmp by the run above — no
+      # extra suite execution. Audit 2026-06: scripts/ measured 65.95%; the
+      # 55% floor prevents a collapse to zero-coverage tooling while leaving
+      # headroom for variance. Raise deliberately, never lower.
+      - name: Coverage floor — scripts/ tooling (≥55%)
+        if: matrix.scope == 'full'
+        run: npx c8 check-coverage --lines 55 --include 'scripts/**/*.cjs' --exclude 'tests/**' --all
+
+      - name: Upload coverage artifact
+        if: always() && matrix.scope == 'full'
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: coverage-unit
+          # coverage/tmp holds raw per-process V8 dumps (>1 GB for the full
+          # unit suite) — exclude it; the rendered reports are the artifact.
+          path: |
+            coverage/
+            !coverage/tmp
+            .nyc_output/
+          if-no-files-found: ignore
 
       - name: Run integration tests
         if: matrix.scope == 'full'
@@ -333,49 +354,6 @@ jobs:
       - name: Run security tests
         run: npm run test:security
 
-  coverage:
-    needs: changes
-    if: needs.changes.outputs.product_changed == 'true'
-    runs-on: ubuntu-latest
-    timeout-minutes: 15
-    env:
-      GSD_PLUGIN_ROOT: .ci-gsd-plugin-root-disabled
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
-        with:
-          fetch-depth: 0
-          persist-credentials: true
-          token: ${{ github.token }}
-      - name: Guard — require GitHub-hosted runner
-        run: node scripts/ci-guard-runner.cjs
-      - name: Rebase check — merge PR base branch into PR head
-        if: github.event_name == 'pull_request'
-        env:
-          GITHUB_TOKEN: ${{ github.token }}
-        run: node scripts/ci-rebase-check.cjs
-      - name: Set up Node.js 24
-        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f  # v6.3.0
-        with:
-          node-version: 24
-          cache: 'npm'
-      - name: Install dependencies
-        run: npm ci
-      - name: Dependency integrity gate
-        run: node scripts/check-npm-integrity.cjs
-      - name: Unit coverage
-        env:
-          NODE_OPTIONS: --max-old-space-size=6144
-        run: npm run test:coverage:unit
-      - name: Upload coverage artifact
-        if: always()
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
-        with:
-          name: coverage-unit
-          path: |
-            coverage/
-            .nyc_output/
-          if-no-files-found: ignore
-
   required-tests:
     name: Required tests
     needs:
@@ -384,7 +362,6 @@ jobs:
       - test
       - test-inert
       - test-full
-      - coverage
     if: always()
     runs-on: ubuntu-latest
     timeout-minutes: 1
@@ -398,7 +375,6 @@ jobs:
           TEST_RESULT: ${{ needs.test.result }}
           INERT_RESULT: ${{ needs.test-inert.result }}
           FULL_TEST_RESULT: ${{ needs.test-full.result }}
-          COVERAGE_RESULT: ${{ needs.coverage.result }}
         run: |
           set -euo pipefail
           echo "code_changed=$CODE_CHANGED"
@@ -408,7 +384,6 @@ jobs:
           echo "test=$TEST_RESULT"
           echo "test-inert=$INERT_RESULT"
           echo "test-full=$FULL_TEST_RESULT"
-          echo "coverage=$COVERAGE_RESULT"
 
           if [ "$CHANGES_RESULT" != "success" ]; then
             echo "::error::test scope detection did not pass"
@@ -430,14 +405,12 @@ jobs:
               echo "::error::test matrix did not pass"
               exit 1
             fi
+            # The coverage gates (lib 70% + scripts/ 55% floor) run inside the
+            # ubuntu/24 full lane of the `test` matrix, so TEST_RESULT covers them.
             if [ "$FULL_TEST_RESULT" != "success" ] && [ "$FULL_TEST_RESULT" != "skipped" ]; then
               echo "::error::full parity matrix did not pass"
               exit 1
             fi
-            if [ "$COVERAGE_RESULT" != "success" ]; then
-              echo "::error::coverage did not pass"
-              exit 1
-            fi
           else
             if [ "$INERT_RESULT" != "success" ]; then
               echo "::error::inert CI lane did not pass"
diff --git a/stryker.config.mjs b/stryker.config.mjs
index 5cd341deb..f21ee66b3 100644
--- a/stryker.config.mjs
+++ b/stryker.config.mjs
@@ -29,6 +29,15 @@
 // force a full tsc rebuild per mutant — far too slow for the 30-min CI budget.)
 // Large/low-coverage modules are excluded (the command's test set does not
 // exercise them, so they would only ever produce survived mutants).
+//
+// KNOWN BLIND SPOT (2026-06 CI audit): this list excludes ~14.2k of ~29.8k
+// lib lines (~48%), including the most central modules (state, core,
+// commands, phase, verify). Mutation results therefore speak only for the
+// well-tested half of the lib. Shrinking the list is deliberate tracked work:
+// bring one module into scope per release by first giving it per-module
+// *.unit.test.cjs / *.property.test.cjs coverage, then deleting its entry —
+// never delete an entry without that coverage (it will only produce survived
+// mutants and trip the break threshold).
 const UNMUTATED = [
   '!gsd-core/bin/lib/command-aliases.cjs',
   '!gsd-core/bin/lib/commands.cjs',

From 9db7958a70b5bbd6c5564e536af5a546c1daa2b1 Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:40:50 -0400
Subject: [PATCH 5/7] fix(review): single eslint home, threshold co-location,
 helper reuse, docs clarity

Review-pass fixes: lint:ci composes npm run lint (one eslint invocation
home); the scripts/ coverage floor moves to package.json
(test:coverage:scripts-floor) so both thresholds live together; the ratchet
test uses helpers.createTempDir; TESTING-SUITES.md clarifies what the
Windows scoped lane runs and why feat-*/enh-* files are exempt from the
bug-* ratchet.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .github/workflows/test.yml                | 12 +++++++-----
 docs/TESTING-SUITES.md                    | 19 ++++++++++++++-----
 package.json                              |  3 ++-
 tests/lint-regression-test-names.test.cjs |  9 +++++----
 4 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e217bd008..146bbf679 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -104,9 +104,10 @@ jobs:
       - name: Build runtime lib (required by lint scripts)
         run: npm run build:lib
       # Single orchestrated lint entry point (npm run lint:ci) so local and CI
-      # always run the identical set. ESLint's --cache flag is intentionally
-      # NOT used here: CI never restores node_modules/.cache, so the flag was
-      # a no-op that only implied caching existed.
+      # always run the identical set. It composes `npm run lint`, keeping one
+      # eslint invocation home; the --cache flag inside it is a no-op in CI
+      # (node_modules/.cache is never restored) but still speeds local runs.
+      # Each sub-lint prints its own banner, so a failure identifies itself.
       - name: Lint — all (ESLint, skill deps, test-file count, command contract, PR checks, legacy name, regression-test names)
         run: npm run lint:ci
 
@@ -203,10 +204,11 @@ jobs:
       # the SAME V8 coverage data left in coverage/tmp by the run above — no
       # extra suite execution. Audit 2026-06: scripts/ measured 65.95%; the
       # 55% floor prevents a collapse to zero-coverage tooling while leaving
-      # headroom for variance. Raise deliberately, never lower.
+      # headroom for variance. The threshold lives in package.json next to
+      # the 70% lib gate — raise deliberately, never lower.
       - name: Coverage floor — scripts/ tooling (≥55%)
         if: matrix.scope == 'full'
-        run: npx c8 check-coverage --lines 55 --include 'scripts/**/*.cjs' --exclude 'tests/**' --all
+        run: npm run test:coverage:scripts-floor
 
       - name: Upload coverage artifact
         if: always() && matrix.scope == 'full'
diff --git a/docs/TESTING-SUITES.md b/docs/TESTING-SUITES.md
index b5f31e053..6454bf961 100644
--- a/docs/TESTING-SUITES.md
+++ b/docs/TESTING-SUITES.md
@@ -46,6 +46,12 @@ identity ratchet (`npm run lint:regression-names`, part of `npm run lint:ci`):
 - **Deleting/consolidating** a grandfathered file requires pruning its
   allowlist entry, so the baseline only ever shrinks.
 
+The ratchet deliberately covers only `bug-*`. Files named `feat-NNNN-*` /
+`enh-NNNN-*` are *feature* test files — one (or one per suite) per feature is
+the sanctioned layout (see the #443 strategy below), not a one-off regression
+pattern. If `issue-*`/`perf-*` one-offs start accumulating the same way
+`bug-*` did, extend the ratchet's regex and regenerate the allowlist.
+
 ## Running suites locally
 
 ```bash
@@ -96,11 +102,14 @@ The `Tests` workflow runs every PR through a scoped gate generated by
   tests.
 
 The default PR gate runs the broad `unit` (under the c8 coverage gate),
-`integration`, and `security` suites once on Ubuntu / Node 24, scoped smoke on
-Ubuntu / Node 22, and scoped Windows-sensitive tests on Windows / Node 24.
-**Every changed test file always joins the Windows scoped lane** (the #494
-invariant, narrowed): a modified test is exercised on the divergent OS before
-merge at per-file cost, without paying for the three full parity lanes.
+`integration`, and `security` suites once on Ubuntu / Node 24, scoped tests on
+Ubuntu / Node 22, and scoped tests on Windows / Node 24. "Scoped" means the
+diff-selected list from the rule table — not the full suite and not a fixed
+smoke set (the fixed smoke list is only the empty-selection fallback). The
+Windows lane's list is the Windows-sensitive subset of the selection, plus
+**every changed test file, unconditionally** (the #494 invariant, narrowed): a
+modified test is exercised on the divergent OS before merge at per-file cost,
+without paying for the three full parity lanes.
 
 PRs touching workflow, package, test-runner, install, release, or
 Windows-sensitive surfaces also run the full parity matrix on macOS and the
diff --git a/package.json b/package.json
index 57f6ce2ad..6838f89ae 100644
--- a/package.json
+++ b/package.json
@@ -91,7 +91,7 @@
     "pretest:coverage": "npm run build:lib && npm run lint:skill-deps",
     "lint": "eslint . --cache --cache-location node_modules/.cache/eslint/",
     "lint:fix": "eslint . --fix",
-    "lint:ci": "eslint . && npm run lint:skill-deps && node scripts/lint-test-file-count.cjs && node scripts/lint-command-contract.cjs && node scripts/lint-pr-check-project-dir.cjs && npm run lint:legacy-name && node scripts/lint-regression-test-names.cjs",
+    "lint:ci": "npm run lint && npm run lint:skill-deps && node scripts/lint-test-file-count.cjs && node scripts/lint-command-contract.cjs && node scripts/lint-pr-check-project-dir.cjs && npm run lint:legacy-name && node scripts/lint-regression-test-names.cjs",
     "lint:regression-names": "node scripts/lint-regression-test-names.cjs",
     "lint:descriptions": "node scripts/lint-descriptions.cjs",
     "lint:skill-deps": "node scripts/lint-skill-deps.cjs",
@@ -111,6 +111,7 @@
     "test:slow": "node scripts/run-tests.cjs --suite slow",
     "test:affected": "node scripts/run-affected-tests.cjs",
     "test:coverage": "c8 --check-coverage --lines 70 --reporter text --include 'gsd-core/bin/lib/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs",
+    "test:coverage:scripts-floor": "c8 check-coverage --lines 55 --include 'scripts/**/*.cjs' --exclude 'tests/**' --all",
     "test:coverage:unit": "c8 --check-coverage --lines 70 --reporter text --include 'gsd-core/bin/lib/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs --suite unit",
     "test:coverage:all": "npm run test:coverage",
     "test:mutation": "stryker run",
diff --git a/tests/lint-regression-test-names.test.cjs b/tests/lint-regression-test-names.test.cjs
index 8f30cd816..430d57d4f 100644
--- a/tests/lint-regression-test-names.test.cjs
+++ b/tests/lint-regression-test-names.test.cjs
@@ -9,17 +9,18 @@ const { describe, test, before, after } = require('node:test');
 const assert = require('node:assert/strict');
 const { spawnSync } = require('child_process');
 const fs = require('fs');
-const os = require('node:os');
 const path = require('path');
-const { cleanup } = require('./helpers.cjs');
+const { createTempDir, cleanup } = require('./helpers.cjs');
 
 const ROOT = path.join(__dirname, '..');
 const SCRIPT = path.join(ROOT, 'scripts', 'lint-regression-test-names.cjs');
 
 let sandbox;
 
+let fixtureCount = 0;
+
 function runLint({ files, allowlist }) {
-  const testsDir = path.join(sandbox, `tests-${Math.random().toString(36).slice(2)}`);
+  const testsDir = path.join(sandbox, `tests-${fixtureCount++}`);
   fs.mkdirSync(testsDir, { recursive: true });
   for (const f of files) fs.writeFileSync(path.join(testsDir, f), '');
   const allowlistPath = path.join(testsDir, 'allowlist.json');
@@ -37,7 +38,7 @@ function runLint({ files, allowlist }) {
 
 describe('lint-regression-test-names', () => {
   before(() => {
-    sandbox = fs.mkdtempSync(path.join(os.tmpdir(), 'gsd-lint-regression-'));
+    sandbox = createTempDir('gsd-lint-regression-');
   });
 
   after(() => {

From 8bb67840097ecb908561027f8050c14925453d94 Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Tue, 9 Jun 2026 23:56:57 -0400
Subject: [PATCH 6/7] chore(ratchet): regenerate bug-* allowlist after rebase
 onto next (244 -> 257)

13 bug-* files landed upstream between the audit baseline and this branch's
rebase; they predate the ratchet policy, so they are grandfathered.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 scripts/lint-regression-test-names.allowlist.json | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/scripts/lint-regression-test-names.allowlist.json b/scripts/lint-regression-test-names.allowlist.json
index f99f80a62..c47663826 100644
--- a/scripts/lint-regression-test-names.allowlist.json
+++ b/scripts/lint-regression-test-names.allowlist.json
@@ -215,6 +215,7 @@
   "bug-3784-gsd-settings-model-profile-ui-omits-adaptive.test.cjs",
   "bug-3805-fast-md-log-to-state-schema.test.cjs",
   "bug-3808-codex-adapter-text-mode-fallback.test.cjs",
+  "bug-3810-no-gsd-sdk-runtime-refs.test.cjs",
   "bug-384-agents-runtime-aware.test.cjs",
   "bug-397-state-preserve-executor-authored.test.cjs",
   "bug-410-install-defaults-test-mode-guard.test.cjs",
@@ -242,5 +243,17 @@
   "bug-663-redos-roadmap-phase-parsing.test.cjs",
   "bug-685-windowshide-spawn.test.cjs",
   "bug-687-agy-timeout.test.cjs",
-  "bug-704-codex-launcher-path-corruption.test.cjs"
+  "bug-704-codex-launcher-path-corruption.test.cjs",
+  "bug-730-milestone-phase-details-scope.test.cjs",
+  "bug-782-cline-skills-emission.test.cjs",
+  "bug-783-kilo-global-skills-base.test.cjs",
+  "bug-853-bg-dispatch-runtime-gating.test.cjs",
+  "bug-866-profile-pipeline-temp-root.test.cjs",
+  "bug-891-non-claude-runtime-home-fallback.test.cjs",
+  "bug-892-validate-checklist-roadmap-phases.test.cjs",
+  "bug-905-state-syncstatefrontmatter-preserve-scalars.test.cjs",
+  "bug-924-claude-flat-skill-layout.test.cjs",
+  "bug-925-context-monitor-hook-event-name.test.cjs",
+  "bug-936-no-nested-spawner-wrap.test.cjs",
+  "bug-941-managed-hooks-registry-manifest.test.cjs"
 ]

From 533b518553d82dc46b0875938d8762a01df719e4 Mon Sep 17 00:00:00 2001
From: Colin <colin@solvely.net>
Date: Wed, 10 Jun 2026 00:15:02 -0400
Subject: [PATCH 7/7] fix(security-scan): update scanner self-exemption
 allowlists for renamed suite files

The three shell scanners exempt their own adversarial test fixtures by exact
filename; the *.security.test.cjs renames broke those entries, so the PR diff
scan flagged the scanners' own test payloads. Verified locally with all three
scanners in --diff origin/next mode (0 findings) and the security suite
(207/207). The .sh files were missed in the original reference sweep because
the rename grep filtered to .cjs/.yml/.json/.md extensions.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 scripts/base64-scan.sh           | 2 +-
 scripts/prompt-injection-scan.sh | 8 ++++----
 scripts/secret-scan.sh           | 6 +++---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/scripts/base64-scan.sh b/scripts/base64-scan.sh
index f7c5c7a5a..a64c44aaf 100755
--- a/scripts/base64-scan.sh
+++ b/scripts/base64-scan.sh
@@ -156,7 +156,7 @@ should_skip_file() {
   # Skip the scan scripts themselves and test files
   case "$file" in
     */base64-scan.sh) return 0 ;;
-    */security-scan.test.cjs) return 0 ;;
+    */security-scan.security.test.cjs) return 0 ;;
   esac
   # Skip scanner fixture directories — they contain deliberate injection samples
   case "$file" in
diff --git a/scripts/prompt-injection-scan.sh b/scripts/prompt-injection-scan.sh
index 78231ef12..5fc8c29fb 100755
--- a/scripts/prompt-injection-scan.sh
+++ b/scripts/prompt-injection-scan.sh
@@ -69,15 +69,15 @@ ALLOWLIST=(
   'scripts/prompt-injection-scan.sh'
   'scripts/base64-scan.sh'
   'scripts/secret-scan.sh'
-  'tests/security-scan.test.cjs'
+  'tests/security-scan.security.test.cjs'
   'tests/security.test.cjs'
-  'tests/prompt-injection-scan.test.cjs'
+  'tests/prompt-injection-scan.security.test.cjs'
   'tests/verify.test.cjs'
   'gsd-core/bin/lib/security.cjs'
   'hooks/gsd-prompt-guard.js'
   'hooks/gsd-read-injection-scanner.js'
-  'tests/read-injection-scanner.test.cjs'
-  'tests/security-prompt-injection.test.cjs'
+  'tests/read-injection-scanner.security.test.cjs'
+  'tests/security-prompt-injection.security.test.cjs'
   'tests/fixtures/adversarial/security/'
   'SECURITY.md'
   # These files contain intentional injection examples / security-model prose
diff --git a/scripts/secret-scan.sh b/scripts/secret-scan.sh
index 82d2b5ab7..9653c8bbd 100755
--- a/scripts/secret-scan.sh
+++ b/scripts/secret-scan.sh
@@ -218,9 +218,9 @@ should_skip_file() {
   # Skip the scan scripts themselves and test files
   case "$file" in
     */secret-scan.sh) return 0 ;;
-    */secret-scan-lint.test.cjs) return 0 ;;
-    */security-scan.test.cjs) return 0 ;;
-    */security-prompt-injection.test.cjs) return 0 ;;
+    */secret-scan-lint.security.test.cjs) return 0 ;;
+    */security-scan.security.test.cjs) return 0 ;;
+    */security-prompt-injection.security.test.cjs) return 0 ;;
     tests/fixtures/adversarial/security/*|*/tests/fixtures/adversarial/security/*) return 0 ;;
   esac
   return 1