Shared Intelligence

The one service most of the Brain is built on

SharedIntelligenceService is the layer that actually implements retrieval (hybrid search, MMR diversification, optional reranking — see Recall & Grounded Answers) and formation (promote(), the entry point the formation pipeline runs through). Skills, personal notes, and Brain-ask all sit on top of it rather than reimplementing retrieval or formation themselves.

A graph, not just a flat list

Memory atoms aren't just individually retrievable — they're linked into a BrainGraph of nodes and typed relations, scoped by BrainScopeKind. That graph structure is what lets a chat turn's memory-formation event and a workflow run's promoted lesson end up in the same connected knowledge fabric instead of two disconnected silos that both happen to be called "memory."

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