The short path
Four steps to a living record.
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01
Install Cairn
Add Cairn to Codex through the local plugin marketplace. Claude Code users can enable the companion hook bridge. Both write to the same local Cairn ledger; no hosted account is required for beta.
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02
Trust the hooks
Review and trust Cairn’s lifecycle hooks when your AI host asks. Start a new task or Claude session so the current hooks and tools are loaded together.
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03
Keep working normally
Use Claude, Codex, or your existing tools as you do today. Cairn observes lifecycle events, advises model routing, and records token economics locally.
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04
Look for the line
At the end of a turn, Cairn shows a compact system state. Cairn: Live means attachment, storage, constitution, heartbeat, and observation checks passed.