mautoblog: ~/en/guide/contextdoc

ContextDoc

The diary of ContextDoc (formerly ConceptDoc), my open source format for giving context to AI agents working on code.

2 parts · 03/2026 – 10/2026

❯ start with part 1
  1. ContextDoc: Your Coding Agent Finally Stops Breaking Things

    ConceptDoc grew up, changed its name, and — most importantly — learned to stay quiet when it has nothing useful to say. Discover how ContextDoc, .ctx files, and the new ctx-watch and ctx-run tools transform your coding agent into a collaborator that truly understands your code.

    02/03/2026 · 11 min

  2. ContextDoc Diary: from a 3D Guinea Pig to 0.4, with Numbers

    From March to today ContextDoc went from a side project to a package on PyPI: a 3D guinea pig, the rule that forbids agents from rewriting tests, a VS Code extension whose first version didn't even start, and in the end a simple question. Does it work? I measured it: without ContextDoc the agent breaks a documented decision 9 times out of 12, when it reads the .ctx files 0 out of 12.

    17/10/2026 · 9 min

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