ETS-backed decision graph store.

Uses three unnamed ETS tables (nodes, edges, and an edge index keyed by endpoint) so multiple instances can coexist. Graph queries use in-memory BFS traversal.

Ownership & lifetime

Like Nous.KnowledgeBase.Store.ETS, this store is intentionally run-scoped: init/1 hands the table references back in state, the caller threads them through ctx for the session, and the tables are reclaimed when the owning process exits. There is no supervised owner and no cross-run persistence — that is the design, not a leak. The tables are :public so the several processes that share a session's state (agent loop + tool tasks) can all write; access is gated by possession of the table reference, which stays inside ctx. Reach for a serializing owner process if you need cross-write atomicity or a lifetime longer than the session.

Quick Start

{:ok, state} = Nous.Decisions.Store.ETS.init([])
node = Nous.Decisions.Node.new(%{type: :goal, label: "Ship v1.0"})
{:ok, state} = Nous.Decisions.Store.ETS.add_node(state, node)