Module knowledge 

Knowledge corpus handlers — atoms, domains, TF-IDF search, fold, index.

Atoms and domains are stored in dedicated knowledge_atoms / knowledge_domains tables (V19 migration) separate from the notes/entities substrate. This lets the knowledge corpus scale to hundreds of thousands of items without polluting the general-purpose store.

Verbs implemented here:

• upsert_atoms — bulk insert/update atoms by slug
• upsert_domains — bulk insert/update domains (named atom groups)
• knowledge.get — fetch one atom or domain by ID or slug
• knowledge.list — paginated listing
• delete_atoms — soft-delete by slug
• stats — corpus statistics
• index — backfill embeddings + FTS for atoms
• fold — budget-constrained knapsack selection
• knowledge.search — TF-IDF + embedding rerank (default; opt out with rerank=false)