test: add firstAUQPick + plan-ceo skip-interview routing

Calibration run 1 surfaced a second issue beyond the parser bug: the
default pick of 1 on /plan-ceo-review's scope-selection AUQ routes
the agent to "branch diff vs main" — so it reviews the gstack PR
itself (recursive!) instead of the seeded fixture plan we sent.

Added firstAUQPick callback to runPlanSkillCounting. Override applies
only to the FIRST AUQ; subsequent presses keep using defaultPick.

ceoStep0Boundary now fires on either the mode-pick AUQ (existing path)
or any AUQ containing "Skip interview and plan immediately" — which
is the scope-selection AUQ. Picking that option bypasses Step 0 and
routes straight to review-phase using the chat-paste plan as context.

Plan-ceo test wires firstAUQPick = pickSkipInterview which finds the
"Skip interview" option by label. Falls back to "describe inline" if
the option labels change.

Two new unit tests: ceoStep0Boundary fires on the scope-selection
fixture; existing mode-pick fixture still fires.

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

test/skill-e2e-plan-ceo-finding-count.test.ts

@@ -21,8 +21,36 @@ import {
   runPlanSkillCounting,
   ceoStep0Boundary,
   assertReviewReportAtBottom,
+  type AskUserQuestionFingerprint,
 } from './helpers/claude-pty-runner';
 
+/**
+ * /plan-ceo-review's first AUQ asks "what scope?" with options like
+ *   1. Branch diff vs main
+ *   2. A specific plan file or design doc
+ *   3. An idea you'll describe inline
+ *   ...
+ *   7. Skip interview and plan immediately
+ *
+ * The default pick (1) routes to "branch diff vs main" — the wrong target
+ * for our seeded fixture (the agent would review the gstack PR itself,
+ * recursively). Picking "Skip interview and plan immediately" bypasses
+ * Step 0 and routes the agent to review the chat context (where our
+ * follow-up plan was pasted).
+ */
+function pickSkipInterview(fp: AskUserQuestionFingerprint): number {
+  const skipOpt = fp.options.find((o) =>
+    /skip\s+interview|plan\s+immediately/i.test(o.label),
+  );
+  if (skipOpt) return skipOpt.index;
+  // Fallback: "describe inline" also routes to using our pasted plan.
+  const inlineOpt = fp.options.find((o) =>
+    /describe.*inline|inline.*idea/i.test(o.label),
+  );
+  if (inlineOpt) return inlineOpt.index;
+  return 1;
+}
+
 const shouldRun = !!process.env.EVALS && process.env.EVALS_TIER === 'periodic';
 const describeE2E = shouldRun ? describe : describe.skip;
 
@@ -93,6 +121,7 @@ describeE2E('/plan-ceo-review per-finding AskUserQuestion count (periodic)', ()
         followUpPrompt: PLAN_CEO_5_FINDINGS,
         isLastStep0AUQ: ceoStep0Boundary,
         reviewCountCeiling: CEILING_DISTINCT + 1, // hard cap above assertion ceiling
+        firstAUQPick: pickSkipInterview, // bypass scope-selection, route to review
         cwd: process.cwd(),
         timeoutMs: 1_500_000, // 25 min
         env: { QUESTION_TUNING: 'false', EXPLAIN_LEVEL: 'default' },