test: delete --disallowedTools AskUserQuestion-blocked test variants

These tests simulated a fictional environment that doesn't exist in
production. Real Conductor sessions launch claude with
`--disallowedTools AskUserQuestion` AND register
`mcp__conductor__AskUserQuestion` — the model has the MCP variant. But
the tests passed `--disallowedTools` without standing up any MCP server,
so they tested "model behavior with NO AUQ available," which no real
user state produces.

Combined with bare `/plan-ceo-review` invocation (no follow-up content),
this forced the model into a 5+ minute deliberation loop trying to
prose-render a question with options it had to first invent. The result
was persistent flakes that consumed nine paid E2E runs trying to fix
"the model takes too long" — but the actual problem was the test
configuration, not the model.

Removals:
- test/skill-e2e-autoplan-auto-mode.test.ts (deleted; the entire file
  was a single AUQ-blocked test)
- test/skill-e2e-plan-ceo-plan-mode.test.ts test 2 (the migrated
  --disallowedTools test); test 1 (baseline plan-mode smoke) stays
- test/skill-e2e-plan-design-plan-mode.test.ts test 2 (same shape);
  test 1 stays
- test/skill-e2e-plan-eng-plan-mode.test.ts test 2 (same shape); test 1
  (baseline) and test 3 (STOP-gate with seeded plan, different
  contract) stay
- test/helpers/touchfiles.ts: autoplan-auto-mode entry removed
- test/touchfiles.test.ts: assertion count + commentary updated

Coverage retained: test 1 of each plan-mode file already verifies the
model fires AUQ; the periodic finding-count tests verify per-finding
AUQ cadence end-to-end. The harness improvements landed during this
debugging cycle (isProseAUQVisible regex, LLM judge, snapshot logging,
high-water-mark tracking, ENOENT-tolerant assertReportAtBottomIfPlanWritten)
all stay — they're useful for the remaining plan-mode tests that can
also encounter prose rendering and slow-thinking phases.

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

test/skill-e2e-plan-design-plan-mode.test.ts

@@ -13,7 +13,6 @@ import { describe, test, expect } from 'bun:test';
 import {
   runPlanSkillObservation,
   assertReportAtBottomIfPlanWritten,
-  isProseAUQVisible,
 } from './helpers/claude-pty-runner';
 
 const shouldRun = !!process.env.EVALS && process.env.EVALS_TIER === 'gate';
@@ -38,56 +37,4 @@ describeE2E('plan-design-review plan-mode smoke (gate)', () => {
     expect(['asked', 'plan_ready']).toContain(obs.outcome);
     assertReportAtBottomIfPlanWritten(obs);
   }, 360_000);
-
-  // v1.21+ regression: see skill-e2e-plan-ceo-plan-mode.test.ts for the
-  // contract. plan-design-review legitimately short-circuits on no-UI-scope
-  // branches, so this case has historically used a looser envelope.
-  //
-  // Post-v1.28 (forever-war fix), 'exited' is acceptable when BLOCKED is
-  // visible in the TTY (model correctly recognized the AUQ-unavailable
-  // failure mode and stopped). The legacy 'plan_ready' (with or without
-  // decisions section) and 'asked' paths remain valid pass outcomes.
-  //
-  // The discriminating regression signals are 'auto_decided' (AUTO_DECIDE
-  // preamble fired upstream), 'silent_write', 'timeout', or 'exited'
-  // without BLOCKED visible — all mean the user never saw a question they
-  // should have.
-  test('does not silently auto-decide when --disallowedTools AskUserQuestion is set', async () => {
-    const obs = await runPlanSkillObservation({
-      skillName: 'plan-design-review',
-      inPlanMode: true,
-      extraArgs: ['--disallowedTools', 'AskUserQuestion'],
-      timeoutMs: 300_000,
-    });
-
-    // Surface visibility check (same as ceo / autoplan migrations): user
-    // must SEE the question via BLOCKED string OR prose-rendered AUQ options.
-    const blockedVisible = /BLOCKED\s*[—-]\s*AskUserQuestion/i.test(obs.evidence);
-    const proseAUQVisible = isProseAUQVisible(obs.evidence) || obs.proseAUQEverObserved === true;
-    const surfaceVisible = blockedVisible || proseAUQVisible || obs.waitingEverObserved === true;
-
-    if (
-      obs.outcome === 'auto_decided' ||
-      obs.outcome === 'silent_write' ||
-      obs.outcome === 'timeout'
-    ) {
-      throw new Error(
-        `plan-design-review AskUserQuestion-blocked regression: outcome=${obs.outcome}\n` +
-          `summary: ${obs.summary}\n` +
-          `elapsed: ${obs.elapsedMs}ms\n` +
-          `--- evidence (last 2KB visible) ---\n${obs.evidence}`,
-      );
-    }
-    if (obs.outcome === 'exited' && !surfaceVisible) {
-      throw new Error(
-        `plan-design-review AskUserQuestion-blocked regression: outcome=exited without any visible question surface (no BLOCKED string, no prose-rendered AUQ options). Model quit silently.\n` +
-          `--- evidence (last 2KB visible) ---\n${obs.evidence}`,
-      );
-    }
-    expect(['asked', 'plan_ready', 'exited']).toContain(obs.outcome);
-    // NOTE: assertReportAtBottomIfPlanWritten intentionally not called —
-    // see skill-e2e-plan-ceo-plan-mode test 2 for the full rationale. Under
-    // --disallowedTools the model can't run a full review, so the
-    // report-at-bottom contract doesn't apply.
-  }, 360_000);
 });