P2: RPG-ZeroRepo generation pipeline

[amondnet]

Summary

Implement the full RPG-ZeroRepo generation pipeline (Intent → Code). Currently only a skeleton exists at src/zerorepo/zerorepo.ts.

Paper reference: RPG-ZeroRepo (arXiv:2509.16198)

Sub-issues

• Stage 1: Feature Tree Grounding + Explore-Exploit Subtree Selection
• Stage 2: File Structure + Data Flow + Interface Design
• Stage 3: Graph-Guided Code Generation
• Test Generation and Majority-Vote Diagnosis

Priority

P2 — Full generation pipeline

Related Files

• src/zerorepo/zerorepo.ts (skeleton)
• docs/implementation-status.md