Project Cairn

Agent skill that turns validated project lessons into a searchable, reusable knowledge base.

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Project Cairn is an agent skill for Claude Code and Codex that records validated lessons, decisions, and progress inside a project as work happens, then, only after human confirmation, distills reusable lessons into a long-term knowledge base in Obsidian, Notion, or Lark/Feishu wiki. Later projects search that base first and cite what they reuse, aimed at developers running multiple AI-agent-assisted projects who want hard-won lessons to survive past a single project.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Project Cairn - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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