Embeddings Brain.

On-device embedding, indexing, and semantic neighbourhood maintenance.

The Embeddings Brain produces and maintains the dense vector representations of the user's corpus. Every embedding is stored on-device and signed by a user-controlled key. The brain rotates indexes, prunes stale chunks, and exposes neighbourhood queries to the Retrieval Brain. No embedding ever leaves the machine; this is the operational rebuttal to vendor RAG patterns that silently sync embeddings to a cloud store.

• 01Local embedding production with signed provenance
• 02Index lifecycle (rotation, pruning, compaction)
• 03Semantic neighbourhood queries for the Retrieval Brain
• 04Embedding deletion on user revocation