🤖 AI Dev Tools

Testing Four Codebase-to-AI Tools on FastAPI's Massive 108k Lines: Token Costs Exposed

Every AI agent session devours your codebase anew, burning tokens like there's no tomorrow. I tested four tools promising relief on FastAPI's beastly repo; one emerged with a tiny 4k-token index that actually commits to git.

theAIcatchup Apr 10, 2026 4 min read
Token cost comparison chart for Repomix, Aider, MCP, and Stacklit on FastAPI codebase

⚡ Key Takeaways

  • Stacklit crushes token counts at 4k for FastAPI, commits to git for team sharing. 𝕏
  • Full code dumps like Repomix waste tokens at scale; indexes unlock architecture. 𝕏
  • Committed JSON indexes could become git standard, like package.json for structure. 𝕏
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#FastAPI #Repomix #ai coding agents #codebase-to-AI tools #stacklit #token costs

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Originally reported by dev.to

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