zettelmesh-embedding-cache

Shared, content-hash-addressed embedding cache for mode: adopted repositories in the zettelmesh workspace.

Adopted repos can't carry .emb sidecar files next to their notes, so their dense vectors live here instead, one file per note body:

<shortname>/<sha256-of-note-body>.emb

• Written by zettel embed <adopted-shortname> (run with an embedding provider configured), then committed and pushed from the local checkout ($ZETTEL_ROOT/_embedding-cache).
• Read by zettel sync, which indexes the dense vectors for adopted notes.

Identical note bodies across repos share one entry (dedup by hash). Referenced from zettelmesh-workspace's registry as embedding_cache_url.