v1.26.4.0 fix: GSTACK REVIEW REPORT delete-then-append (no more mid-file leftovers) (#1335)

* fix: GSTACK REVIEW REPORT delete-then-append flow

Replaces contradictory "replace it entirely" + "always last section / move
if mid-file" bullets in scripts/resolvers/review.ts with a single
delete-then-append rule. Adds Read-tool verification step so the agent
self-checks before continuing.

Affected SKILL.md files (regenerated): plan-ceo-review, plan-design-review,
plan-devex-review, plan-eng-review, codex, devex-review.

* test: static template assertions for delete-then-append + revert autoplan E2E shape

5 new static tests in test/gen-skill-docs.test.ts (4 plan-review SKILL.md
files + 1 source resolver) verify the new prompt language is present and
the old contradictory bullets are absent. Synthetic regression check
confirmed all 5 fail when the prompt fix is reverted.

The autoplan E2E (skill-e2e-autoplan-auto-mode.test.ts) reverts to its
original AUQ-blocked-gate-surface shape. The mid-file regression scenario
the plan briefly proposed isn't reachable in the current PTY harness because
--disallowedTools AskUserQuestion makes autoplan bail at the Phase 1
premise gate before any review-write code path runs. Static prompt-text
verification covers the load-bearing change.

* chore: bump version and changelog (v1.26.4.0)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

test/gen-skill-docs.test.ts

@@ -2977,3 +2977,48 @@ describe('plan-mode-info resolver (handshake-replacement)', () => {
     expect(between).toContain('Do NOT proceed to Step 0D or 0F until the user responds to 0C-bis');
   });
 });
+
+// GSTACK REVIEW REPORT report-at-bottom contract — verifies the prompt-text
+// fix in scripts/resolvers/review.ts (the load-bearing change for the
+// "report not at bottom of plan in plan mode" bug). The bug is in the
+// prompt's contradictory write-flow instructions, not in observable
+// runtime behavior we can cheaply gate in CI. Verifying the prompt text
+// directly is the deterministic equivalent of the regression test the
+// PTY harness can't reliably drive (autoplan needs auto-progression of
+// AskUserQuestions to reach the report-write step, which the harness
+// doesn't support today).
+describe('GSTACK REVIEW REPORT delete-then-append flow', () => {
+  const PLAN_REVIEW_SKILLS = [
+    'plan-ceo-review',
+    'plan-design-review',
+    'plan-devex-review',
+    'plan-eng-review',
+  ];
+
+  for (const skill of PLAN_REVIEW_SKILLS) {
+    test(`${skill}/SKILL.md prescribes delete-then-append, not in-place replace`, () => {
+      const content = fs.readFileSync(path.join(ROOT, skill, 'SKILL.md'), 'utf-8');
+
+      // The new (correct) instruction must be present.
+      expect(content).toContain('delete-then-append flow');
+      expect(content).toContain('never mid-file');
+      expect(content).toContain('Do NOT replace the section in place');
+
+      // The old contradictory bullets must be gone. The signature phrase
+      // from the buggy prompt was 'replace it entirely using the Edit tool'
+      // which is what allowed mid-file reports to stay mid-file.
+      expect(content).not.toContain('replace it** entirely using the Edit tool');
+      expect(content).not.toContain('If it was found mid-file, move it');
+    });
+  }
+
+  test('scripts/resolvers/review.ts source has the rewritten flow', () => {
+    const src = fs.readFileSync(path.join(ROOT, 'scripts', 'resolvers', 'review.ts'), 'utf-8');
+    expect(src).toContain('delete-then-append flow');
+    expect(src).toContain('never mid-file');
+    expect(src).toContain('Do NOT replace the section in place');
+    // Old contradictory bullets are gone from the source resolver.
+    expect(src).not.toContain('replace it** entirely using the Edit tool');
+    expect(src).not.toContain('If it was found mid-file, move it');
+  });
+});