Summary

• Add codebase-analyzer agent for pre-design codebase investigation, producing structured JSON guidance for technical-designer
• Insert code-verifier before document-reviewer in design flows so review uses structured verification evidence
• Add Investigation Targets to task-decomposer/task-executor with Phase Entry Gate and Completion Gate enforcement
• Add E2E environment prerequisites extraction in work-planner (Phase 0 task generation) and missing_prerequisites blocked type in quality-fixer
• Add Test Boundaries section to Design Doc template and Data Layer Testing section to typescript-testing skill
• Update all orchestration flows (backend/frontend/fullstack), commands, and skills-index metadata

Test plan

• Verify codebase-analyzer appears in orchestration-guide agent list, flow steps, call examples, and information bridging (EN/JA)
• Verify design flow step counts match (Large: 13/15, Medium: 9/11) in orchestration-guide and design command
• Verify code-verifier Call Example exists in orchestration-guide (EN/JA)
• Verify quality-fixer blocked.reason uses English constants in both EN and JA versions
• Verify similar_component_found is listed in orchestration-guide escalation_type (EN/JA)
• Verify skills-index.yaml includes Data Layer Testing section for typescript-testing and e2e-environment-prerequisites reference for integration-e2e-testing (EN/JA)
• Verify Investigation Targets section exists in task-template (EN/JA)
• Verify front-design document-reviewer call includes doc_type/target/mode parameters (EN/JA)

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