Retrieval.

Retrieval 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.

• 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

Authoritative external corpora and standards this brain treats as canonical. Every retrieval against these sources is signed into the audit ledger so a regulator can prove which evidence drove which output.

• 01Mickai Patent 05, 16, 18, 47
• 02BEIR retrieval benchmark
• 03TREC retrieval-track corpora
• 04ColBERT and dense retrieval literature
• 05Anserini and Pyserini frameworks
• 06ISO 15489 records management
• 07Apache Lucene documentation
• 08MTEB benchmark suite
• 09RAG-Survey academic corpus

Mickai-native tooling primitives this brain implements internally. Codex for sovereign plain-text graph PKM, Lectern for spaced-repetition memory, Stele for citation-provenance, and domain-native primitives layered on top. No external services in the trust path; data stays on operator-personalised hardware.

• 01Beacon (full-text search engine)
• 02Lodestone (vector index)
• 03Cataloguer (corpus management)
• 04Aegis (clearance-ceiling enforcement)