Claude Code fell short for documenting a large repo

The goal is to turn a large into a for developers, QA staff, and product managers. The desired output is not one giant document, but a set of layered docs that reveal detail step by step.

The needed docs include a high-level repo overview, module responsibilities and boundaries, , data flow, , core logic flows, and key APIs or . Claude Code with Opus 4.8 scanned the repo and generated docs, but the result was too shallow.

The reasoning behind its conclusions was unclear, and the most important core logic flows were mostly missing. Better prompts, doc formats, and skills are needed for real-world codebases.

Key points

  • The target output is a for developers, QA staff, and product managers.
  • The docs should be split into layers instead of one huge document.
  • The desired sections include repo overview, module boundaries, , data flow, , core logic flows, and APIs.
  • Claude Code with Opus 4.8 produced shallow results with unclear evidence.
  • Core logic flows were mostly missing, which makes the docs less useful for real work.
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