Observed arrival · 2026-09-21
Cairn, a local memory vault for coding agents
Cairn stores searchable decisions, notes, and handoffs in a shared SQLite vault on the project machine.
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$Paid
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers running coding agents across repeated sessions
- Worth noticing
- Superseded memories are retired rather than duplicated, while the vault remains a local SQLite file.
Field notes
Cairn organizes agent memory as versioned facts rather than an undifferentiated notes file. Its documented workflow includes team and task fields, named agents, semantic retrieval, replacement links, and archive or restore operations. Bootstrap can write .mcp.json and AGENTS.md into a project, while the MCP integration runs locally without an API key. Export and import provide a file-based sharing path through git; the page distinguishes that from a separate optional sync server.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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