The Two-Store Model

Ijima serves two related but distinct stores, unified by a miner that turns one into the other.

1. The Memory Palace

Long-term, curated, semantic memory. Verbatim storage + candle embeddings + cosine search + a temporal knowledge graph (entities and triples with valid_from/valid_to). This is the pi-mempalace model, production-proven, reimplemented in Rust and import-compatible with its schema.

Palace entries always carry provenance: source tier, harness, session, origin instance, and authority scope — so any entry traces back to the conversation that produced it.

2. The Session Context Repository

Raw session transcripts from every harness: every conversation, every agent run, every gateway exchange. Append-only, high-fidelity, uncensored at write time. Not curated, not summarized — the raw ore.

The Miner: ore → metal

The novel capability. Ijima mines raw sessions to extract curated palace entries:

• Decisions — “we decided to use DeepSeek.”
• Facts — “Ijima depends on candle.”
• References — URLs, citations, file paths.
• Patterns — recurring topics, open threads.

A rules tier runs unconditionally (no model); an optional LLM tier (Proserpina) adds Fact + Pattern roles. Low-confidence extractions stage in a per-namespace review queue rather than auto-archiving. See The Mining Pipeline.

   raw sessions ──▶ [ rules + llm ] ──▶ Auto (palace) / PendingReview (queue)

The raw session always remains in the repository for full-fidelity recall, even after mining.