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Microsoft released FastContext-1.0, a lightweight repository-exploration subagent for LLM coding agents that reduces main-agent token consumption by up to 60% while improving resolution rates by up to 5.5%.
FastContext introduces specialized exploration models that separate repository exploration from code solving in LLM agents, reducing token consumption by up to 60% while improving resolution rates on software engineering benchmarks.
SWE-Explore introduces a benchmark for evaluating coding agents' repository exploration capabilities, requiring ranked lists of relevant code regions within line budgets. Experiments show agentic exploration outperforms traditional retrieval, and line-level coverage remains a key differentiator.