Feat: Implement Project Claim Output Brake and refine agent reasoning

docs/records/ConnectAI/development/2026-05-02_project-claim-output-brake.md

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+# Development Log: Project Claim Output Brake
+
+## Purpose
+Stop unsupported project technical claims in the final answer body, not only in Trace diagnostics.
+
+## Problem
+Even when Trace reported `projectClaimPolicy=general-only`, the model could still write phrases such as:
+- "기술적 기반 면에서는 안정적"
+- "아키텍처는 유연하나"
+- "모듈화된 구조는 향후 기능 추가 시 유연성을 제공합니다"
+
+Prompt guidance alone was not enough.
+
+## Implementation Summary
+- Added `enforceProjectClaimPolicyInAnswer`.
+- When `projectClaimPolicy=general-only`, final answer text is scanned before output.
+- Unsupported technical structure claim sentences are removed.
+- A safe notice is inserted:
+  - "현재 정보만으로는 기술 구조를 판단할 수 없습니다."
+  - "기술적 안정성, 아키텍처 유연성, 모듈화 여부는 소스 코드나 설계 문서 확인이 필요합니다."
+- Connected the enforcement function in `AgentExecutor` before final response streaming and history persistence.
+- Added regression tests for the exact problematic phrases.
+
+## Changed Files
+- `src/features/secondBrainTrace.ts`
+- `src/agent.ts`
+- `tests/secondBrainTrace.test.ts`
+
+## Verification
+- `./node_modules/.bin/tsc --noEmit`
+- `npm run compile`
+- `./node_modules/.bin/jest --runInBand`
+
+## Result
+The system now has a deterministic output brake for unsupported project implementation claims when Trace says only general/reference evidence is available.