test(W7h): retire the bws session-awareness (ELI16) paid case

W7h retirement (t14 F5). Removes the case from test/skill-e2e-bws.test.ts and
its E2E_TOUCHFILES / E2E_TIERS (gate) / E2E_KINDS (rule) entries in
test/helpers/touchfiles-data.ts; scripts/paid-test-durations.json is
per-file and test/helpers/periodic-exclude-data.ts had no entry.
test/touchfiles.test.ts selection examples now name sibling cases with the
same touchfiles (skillmd-outside-git, skillmd-no-local-binary).
e2e-tier-alignment, eval-kinds and touchfiles stay green.

Retirement card:
- test: skill-e2e-bws.test.ts 'session-awareness' (gate, paid).
- detects: nothing gstack ships. The prompt coaches a mode that no longer
  exists ("_SESSIONS=4, so ELI16 mode is active ... Re-ground them";
  `git grep ELI16` outside test/ and CHANGELOG is empty) and says "DO NOT
  actually call AskUserQuestion"; every asserted word (billing/acme,
  payment/feature, stripe/checkout, recommend) comes from the prompt itself.
- non_test_callers: none.
- search_command: git grep -n "session-awareness\|ELI16" -- test scripts
- stronger_proof / replacement: the AUQ format's grounding line
  'Project/branch/task: <1 short grounding sentence using _BRANCH>' is pinned
  free by plan-review-calibration.test.ts (format tokens) and graded by gate
  E2E auq-format-gate; session identity in the preamble stays pinned by
  skill-validation.test.ts 'contains session awareness' and
  gen-skill-docs.test.ts 'session awareness lives in gstack-skill-start'.
- history: c118e24 v1.64.1.0 (#2572).
- validation: bun test test/touchfiles.test.ts test/e2e-tier-alignment.test.ts
  test/eval-kinds.test.ts.

Control (scratch worktree, against the replacement): removing the
'Project/branch/task:' grounding line from the AUQ format resolver turns
plan-review-calibration.test.ts red (1/1). Log:
.context/mutation-session-awareness.md.

test/helpers/touchfiles-data.ts

@@ -96,7 +96,6 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
   'skillmd-no-local-binary':  [ 'SKILL.md', 'SKILL.md.tmpl', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-bws.test.ts'],
   'skillmd-outside-git':      [ 'SKILL.md', 'SKILL.md.tmpl', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-bws.test.ts'],
 
-  'session-awareness':        [ 'SKILL.md', 'SKILL.md.tmpl', 'scripts/gen-skill-docs.ts', 'test/skill-e2e-bws.test.ts'],
   'operational-learning':     ['bin/gstack-state-root.sh', 'lib/state-root.ts', 'scripts/resolvers/preamble.ts', 'bin/gstack-learnings-log', 'test/skill-e2e-bws.test.ts'],
 
   // QA (+ test-server dependency). /qa drives Aside first (the resolver) and
@@ -1150,7 +1149,6 @@ export const E2E_TIERS: Record<string, 'gate' | 'periodic' | 'marathon'> = {
   'skillmd-setup-discovery': 'gate',
   'skillmd-no-local-binary': 'gate',
   'skillmd-outside-git': 'gate',
-  'session-awareness': 'gate',
   'operational-learning': 'gate',
 
   // P4 first-run scaffold — periodic (onboarding, non-safety, model-touched marker)
@@ -1613,7 +1611,6 @@ export const E2E_KINDS: Record<string, 'rule' | 'behavior' | 'judge'> = {
   'skillmd-setup-discovery': 'rule',
   'skillmd-no-local-binary': 'rule',
   'skillmd-outside-git': 'rule',
-  'session-awareness': 'rule',
   'operational-learning': 'rule',
   'qa-quick': 'rule',
   'qa-b6-static': 'rule',

test/skill-e2e-bws.test.ts

@@ -20,7 +20,7 @@ let tmpDir: string;
 
 describeIfSelected('Skill E2E tests', [
   'browse-basic', 'browse-snapshot', 'skillmd-setup-discovery',
-  'skillmd-no-local-binary', 'skillmd-outside-git', 'session-awareness',
+  'skillmd-no-local-binary', 'skillmd-outside-git',
   'operational-learning',
 ], () => {
   beforeAll(() => {
@@ -301,113 +301,6 @@ Log the operational learning now. Then say what you logged.`,
     try { fs.rmSync(opDir, { recursive: true, force: true }); } catch {}
   }, JUDGE_MS);
 
-  testConcurrentIfSelected('session-awareness', async () => {
-    const sessionDir = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-e2e-session-'));
-
-    // Set up a git repo so there's project/branch context to reference
-    const run = (cmd: string, args: string[]) =>
-      spawnSync(cmd, args, { cwd: sessionDir, stdio: 'pipe', timeout: 5000 });
-    run('git', ['init', '-b', 'main']);
-    run('git', ['config', 'user.email', 'test@test.com']);
-    run('git', ['config', 'user.name', 'Test']);
-    fs.writeFileSync(path.join(sessionDir, 'app.rb'), '# my app\n');
-    run('git', ['add', '.']);
-    run('git', ['commit', '-m', 'init']);
-    run('git', ['checkout', '-b', 'feature/add-payments']);
-    // Add a remote so the agent can derive a project name
-    run('git', ['remote', 'add', 'origin', 'https://github.com/acme/billing-app.git']);
-
-    // Extract AskUserQuestion format instructions from a generated SKILL.md.
-    // ROOT/SKILL.md is the browse skill (Tier 1) and does NOT contain the
-    // "## AskUserQuestion Format" section — that block is only emitted for
-    // Tier 2+ skills by scripts/resolvers/preamble.ts. Use office-hours/SKILL.md
-    // (Tier 3) which always has the format guidance baked in. Falls back to
-    // the first SKILL.md that contains the header so a future template move
-    // doesn't break this test again.
-    let skillMdPath = path.join(ROOT, 'office-hours', 'SKILL.md');
-    let skillMd = '';
-    if (fs.existsSync(skillMdPath)) {
-      skillMd = fs.readFileSync(skillMdPath, 'utf-8');
-    }
-    if (!skillMd.includes('## AskUserQuestion Format')) {
-      // Fallback: scan top-level skill dirs for the first match.
-      const skillDirs = fs.readdirSync(ROOT, { withFileTypes: true })
-        .filter(d => d.isDirectory())
-        .map(d => path.join(ROOT, d.name, 'SKILL.md'));
-      for (const candidate of skillDirs) {
-        if (!fs.existsSync(candidate)) continue;
-        const content = fs.readFileSync(candidate, 'utf-8');
-        if (content.includes('## AskUserQuestion Format')) {
-          skillMd = content;
-          skillMdPath = candidate;
-          break;
-        }
-      }
-    }
-    const aqStart = skillMd.indexOf('## AskUserQuestion Format');
-    const aqEnd = skillMd.indexOf('\n## ', aqStart + 1);
-    const aqBlock = aqStart >= 0
-      ? skillMd.slice(aqStart, aqEnd > 0 ? aqEnd : undefined)
-      : '';
-
-    const outputPath = path.join(sessionDir, 'question-output.md');
-
-    const result = await runSkillTest({
-      prompt: `You are running a gstack skill. The session preamble detected _SESSIONS=4 (the user has 4 gstack windows open).
-
-${aqBlock}
-
-You are on branch feature/add-payments in the billing-app project. You were reviewing a plan to add Stripe integration.
-
-You've hit a decision point: the plan doesn't specify whether to use Stripe Checkout (hosted) or Stripe Elements (embedded). You need to ask the user which approach to use.
-
-Since this is non-interactive, DO NOT actually call AskUserQuestion. Instead, write the EXACT text you would display to the user (the full AskUserQuestion content) to the file: ${outputPath}
-
-Remember: _SESSIONS=4, so ELI16 mode is active. The user is juggling multiple windows and may not remember what this conversation is about. Re-ground them.`,
-      workingDirectory: sessionDir,
-      maxTurns: 8,
-      timeout: JUDGE_MS,
-      testName: 'session-awareness',
-      runId,
-    });
-
-    logCost('session awareness', result);
-    recordE2E(evalCollector, 'session awareness ELI16', 'Skill E2E tests', result);
-
-    // Verify the output contains ELI16 re-grounding context
-    if (fs.existsSync(outputPath)) {
-      const output = fs.readFileSync(outputPath, 'utf-8');
-      const lower = output.toLowerCase();
-      // Must mention project name
-      expect(lower.includes('billing') || lower.includes('acme')).toBe(true);
-      // Must mention branch
-      expect(lower.includes('payment') || lower.includes('feature')).toBe(true);
-      // Must mention what we're working on
-      expect(lower.includes('stripe') || lower.includes('checkout') || lower.includes('payment')).toBe(true);
-      // Must have a recommendation or structured options
-      expect(
-        output.includes('RECOMMENDATION') ||
-        lower.includes('recommend') ||
-        lower.includes('option a') ||
-        lower.includes('which do you want') ||
-        lower.includes('which approach')
-      ).toBe(true);
-    } else {
-      // Check agent output as fallback
-      const output = result.output || '';
-      const lowerOut = output.toLowerCase();
-      expect(
-        output.includes('RECOMMENDATION') ||
-        lowerOut.includes('recommend') ||
-        lowerOut.includes('option a') ||
-        lowerOut.includes('which do you want') ||
-        lowerOut.includes('which approach')
-      ).toBe(true);
-    }
-
-    // Clean up
-    try { fs.rmSync(sessionDir, { recursive: true, force: true }); } catch {}
-  }, JUDGE_MS);
 });
 
 // Module-level afterAll — finalize eval collector after all tests complete

test/touchfiles.test.ts

@@ -340,7 +340,7 @@ describe('selectTests', () => {
     expect(result.reason).toBe('diff');
     // Should include tests that depend on gen-skill-docs.ts
     expect(result.selected).toContain('skillmd-setup-discovery');
-    expect(result.selected).toContain('session-awareness');
+    expect(result.selected).toContain('skillmd-outside-git');
     expect(result.selected).toContain('journey-ideation');
     // Should NOT include tests that don't depend on it
     expect(result.selected).not.toContain('retro');
@@ -389,8 +389,8 @@ describe('selectTests', () => {
     const result = selectTests(['SKILL.md.tmpl'], E2E_TOUCHFILES);
     // Should select the 7 tests that depend on root SKILL.md
     expect(result.selected).toContain('skillmd-setup-discovery');
-    expect(result.selected).toContain('session-awareness');
-    expect(result.selected).toContain('session-awareness');
+    expect(result.selected).toContain('skillmd-no-local-binary');
+    expect(result.selected).toContain('skillmd-outside-git');
     // Also selects journey routing tests (SKILL.md.tmpl in their touchfiles)
     expect(result.selected).toContain('journey-ideation');
     // Should NOT select unrelated non-routing tests