Show & tell: cross-device store sync without changing mnemon

[b1rdex]

Thanks for mnemon — the LLM-supervised design is lovely to build on. 🙏

I run Claude Code on two machines and wanted the same memory on both. Since a store is just a SQLite DB, I put together a small external tool (more duct tape than engineering) that keeps stores in sync across devices without changing mnemon at all.

Repo: https://github.com/b1rdex/mnemon-sync

The gist: instead of file-syncing the live .db (which corrupts and can't be merged), each machine publishes a per-device snapshot and the other side merges them back with last-writer-wins — converging without ever losing a memory. It leans on things mnemon already does right (UUID ids, soft-delete, an updated_at on every row) and runs automatically via Claude Code hooks.

I used Syncthing to move the files around because it's private (device-to-device, nothing on third-party servers) and free — but the tool doesn't care how the folder gets synced, so in theory iCloud / Dropbox / whatever should work too (haven't tested those).

Not asking for anything to be merged — just sharing in case it's useful to anyone else running mnemon on more than one machine, and happy to be corrected if I've misread any internals. Thanks again!

[MoonCaves]

Hey, cool idea, - big Syncthing fan between my macs and VPS, but did you consider Mnemon recall bumps access_count but not updated_at ?

[b1rdex]

Good catch — confirmed: recall bumps access_count / last_accessed_at but not updated_at, so the LWW merge was dropping those bumps.

Fixed in 9a35fa0: content still resolves by updated_at, while access_count and last_accessed_at now merge as the max of the two sides — recall activity propagates between devices and survives content edits.