Brain 09 of 25 · Knowledge and Memory
Retrieval Brain.
Sovereign retrieval-augmented generation with clearance-ceiling tagging.
What this brain does
The Retrieval Brain implements the Privacy-Preserving Sovereign RAG pipeline (patent 05). Every chunk in the on-device corpus is tagged with a clearance ceiling. A query that lacks the right clearance receives the same response as a query for content that does not exist. The system never reveals that classified material was hidden, only that nothing was found. Absence is indistinguishable from nonexistence.
Responsibilities
- 01Local vector retrieval with clearance-ceiling enforcement
- 02Indistinguishable-absence response semantics
- 03Source tracking for the audit lineage
- 04Hybrid lexical and semantic search on local indexes
Patents this brain implements
Patent 05
Privacy-Preserving Sovereign RAG
Clearance-ceiling retrieval. Absence is indistinguishable from nonexistence.
Patent 16
Decision Lineage and PQ-Signed Audit Ledger
DAG of decisions, causally signed, regulator-verifiable.
Patent 18
Granular Row/Column ACL
Per-voiceprint revocation retroactively invalidates prior access.
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