FastContext

Microsoft CoreAI + Shanghai Jiao Tong University's open-source repository-exploration subagent (June 2026): trained 4B–30B Qwen-based explorers (Read/Glob/Grep, parallel, compact file-line citations) that decouple repo search from solving; +up to 5.5% SWE-bench resolution, −up to 60% main-agent tokens; code + data released