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Colby McHenry 25f8f2b89a feat(mcp): iter3/iter4 — raise tool-gate to 500, sufficiency steering in context, hard-exclude low-value files
Three layered changes targeting the sinatra/slim/small-repo cost gap
that iter2's body-shrink failed to close (smaller bodies just pushed
the agent to Read instead):

1. **Tool-gate threshold 150 → 500** (`TINY_REPO_FILE_THRESHOLD`).
   Sinatra (~159 files) and slim (~200 files) have the same structural
   problem as cobra (
2026-05-27 16:47:02 -05:00
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