Rayca

• Recall Episodes — READ — top-k episodic memories for a query (PP-3), each with provenance.
• Query Facts — READ — semantic facts matching a {s,p,status} pattern (PP-4), bi-temporal, with provenance.
• Retrieve Procedures — READ — top-k procedures for a task context (PP-5), status-filtered, with provenance.
• Recall Institutional — READ — recall institutional evidence (who-knows-what: team, expert, provenance and hand-over knowledge) from the institutional memory layer (PP-6), bi-temporal, each with provenance. USE THIS for 'who worked on X' / 'which team owns X' / 'who is the expert on X' / 'why was X decided' questions — it is the layer the route tool names as 'institutional'. filters is an optional equality map over 'evidence_type' | 'program_id' | 'project_id' | 'status' | 'ip_status' (any other key is rejected); evide
• Route — READ — which memory layers a query should be answered from (PP-7 router).
• Append — WRITE (append-only) — append an immutable record. status must be one of 'hypothesis' | 'supported' | 'retracted' | 'tombstone' ('supported' = sourced/trusted and REQUIRES provenance; unsourced writes land as 'hypothesis'). Returns the record id + lineage run_id.
• Supersede — WRITE (append-only) — write a NEW version linking new→old (the old row is never altered; there is no in-place update). Returns the new record id + lineage run_id.

Schemas and invoke metadata: Directory API