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Every coding agent hits the same wall: it doesn’t know your codebase, and stuffing everything into one bloated CLAUDE.md doesn’t scale. LangChain just open-sourced OpenWiki, a CLI that fixes this by writing docs for the machine instead of the human.

What it actually does

Point OpenWiki at a repo and it scans the code, then generates structured markdown into an openwiki/ folder — not prose, but context an LLM can pull mid-task. When code changes, it uses git diffs to refresh only what moved. It also edits your CLAUDE.md / AGENTS.md to add references, so the agent knows when to go read the wiki. A bundled GitHub Action opens a docs-update PR daily. It hit LangChain’s front-page launch and 77 points on Hacker News fast.

The CLI and where it plugs in

init asks for a provider and API key, then builds the wiki. Bring your own backend: OpenRouter, Fireworks, Baseten, OpenAI, or Anthropic. Keep the CLI open for Q&A over your docs, or run -p for one-shot output in CI. It’s basically Karpathy’s “give the agent a wiki” idea, shipped.

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