Integrate SWE-bench evaluation for RPG-Encoder

[amondnet]

Summary

Integrate SWE-bench evaluation to measure RPG-Encoder performance on real-world software engineering tasks.

Paper: RPG-Encoder §5 (arXiv:2602.02084)

Tasks

• Set up SWE-bench evaluation harness
• Integrate RPG tools (SearchNode, FetchNode, ExploreRPG) as agent tools
• Run evaluations and compare against paper results
• Report generation

Acceptance Criteria

• End-to-end SWE-bench evaluation pipeline works
• Results are comparable with paper baselines (78% with Gemini Flash)

Related Files

• src/tools/search.ts, src/tools/fetch.ts, src/tools/explore.ts