plan2code-bot: replace auto-responder with LLM-as-judge evaluation

Bot now acts as an authentic QA agent instead of rubber-stamping every
question and step.

- intelligent-responder answers AskUserQuestion via LLM using current
  observations (tools used, files created, errors) instead of keyword
  matching; auto-responder removed.
- evaluator runs after each step with step-specific criteria
  (prompts/evaluation-criteria.ts), produces 0-100 score plus
  strengths/weaknesses/critical issues. Avg <60 blocks finalization.
- observation-collector captures tool_use, file writes, errors, and
  question reasoning; session-runner falls back to scraping tool_use
  blocks when canUseTool doesn't fire and dedupes both sources.
- Bot writes BOT-EVALUATION.md and BOT-NOTES.md for metrics analysis.
- Idea generator: 12 categories instead of CLI/web-app coin flip,
  stronger seed adherence, less developer-tool bias.
- Init step now writes a minimal AGENTS.md stub instead of running
  the full init skill, avoiding hallucinated architecture before plan.
- Implement step uses Read/Write/Edit/Glob/Grep directly instead of
  a Skill sub-session that produced no visible tool observations.
- bin: add --help, accept --idea="value" form, strip surrounding
  quotes; evaluator maxTurns 3 -> 30; warn when parser misses SCORE.

plan2code-bot/src/session-runner.test.ts

@@ -7,6 +7,7 @@ vi.mock('@anthropic-ai/claude-agent-sdk', () => ({
 
 import { query } from '@anthropic-ai/claude-agent-sdk';
 import { runSession } from './session-runner.js';
+import { ObservationCollector } from './observation-collector.js';
 import type { BotConfig } from './types.js';
 
 const config: BotConfig = {
@@ -35,14 +36,17 @@ describe('runSession', () => {
       })() as any,
     );
 
+    const collector = new ObservationCollector('init');
     const result = await runSession({
       prompt: 'do something',
       config,
       step: 'init',
+      collector,
     });
 
     expect(result.success).toBe(false);
     expect(result.output.trim()).toBe('');
+    expect(result.observations).toBeDefined();
   });
 
   it('returns success: true when output has content', async () => {
@@ -61,14 +65,18 @@ describe('runSession', () => {
       })() as any,
     );
 
+    const collector = new ObservationCollector('init');
     const result = await runSession({
       prompt: 'do something',
       config,
       step: 'init',
+      collector,
     });
 
     expect(result.success).toBe(true);
     expect(result.output).toContain('AGENTS.md');
     expect(result.sessionId).toBe('sess-2');
+    expect(result.observations).toBeDefined();
+    expect(result.observations.step).toBe('init');
   });
 });