test: derive paid touchfiles from each eval's static closure (E)

touchfiles.test.ts now checks, per key, that the paid file's static
test/helpers and test/fixtures closure (plus fixture paths it names in string
literals) is covered, and names the file, path, chain and key to fix when it is
not. Free *.test.ts files are no longer touchfiles, so editing a free replay
test stops selecting paid evals: 950 entries removed, 653 real closure paths
added. The hand-copied inventories go: periodic-fixture-selection,
fake-impeccable-touchfiles and 45 per-file selection examples. Selection for
the sample edits (plan-eng-review template, claude-pty-runner,
plan-count-fixture, gstack-config) loses no case under either profile.
CONTRIBUTING documents the rule and its lower bound.

test/ceo-mode-prerequisite.test.ts

@@ -7,7 +7,6 @@ import { execFileSync } from 'node:child_process';
 import { nextCeoModeNavigation } from './helpers/ceo-mode-option';
 import { planCountQuestionInput } from './helpers/claude-pty-runner';
 import type { NativePlanQuestionCall } from './helpers/plan-count-transcript';
-import { E2E_TOUCHFILES, selectTests } from './helpers/touchfiles';
 import priorCalls from './fixtures/ceo-mode-prerequisite-o-calls.json';
 import directProceedCall from './fixtures/ceo-mode-prerequisite-q-call.json';
 import fullAd from './fixtures/ceo-mode-full-ad.json';
@@ -88,9 +87,6 @@ describe('CEO mode prerequisite navigation', () => {
     const modes='☐ Review mode\nWhich mode?\n❯ 1. SELECTIVE EXPANSION\n  2. HOLD SCOPE\n  3. SCOPE EXPANSION\n  4. SCOPE REDUCTION';
     for(const [mode,index] of [['HOLD SCOPE',2],['SCOPE EXPANSION',3]] as const){const a=nextCeoModeNavigation(modes,mode,new Set());expect(a.kind).toBe('mode');if(a.kind==='mode')expect(a.index).toBe(index);}
   });
-  test('fixture and free regression select only the mode-routing eval', () => {
-    for(const file of ['test/ceo-mode-prerequisite.test.ts','test/fixtures/ceo-mode-prerequisite-o-calls.json','test/fixtures/ceo-mode-prerequisite-q-call.json'])expect(selectTests([file],E2E_TOUCHFILES).selected).toEqual(['plan-ceo-mode-routing']);
-  });
 });
 for(const fixtureIndex of [1,2,3,4])test.skipIf(process.platform==='win32')(`fake native PTY skips prerequisite ${fixtureIndex} and confirms target posture`,async()=>{
   const dir=fs.mkdtempSync(path.join(os.tmpdir(),'ceo-mode-prerequisite-')),fake=path.join(dir,'fake-claude'),events=path.join(dir,'events.jsonl'),worker=path.join(dir,'worker.ts');