[ADR-032] Brain Profile Orchestration

[ohdearquant]

Summary

Replace scalar in-memory brain state with profile-oriented orchestration, event interpretation contracts, and profile-aware brain verb behavior.

Source ADRs

• F177 ADR-032 (CRIT): BrainState is still the predecessor scalar model: parameters: HashMap<String, BetaPosterior>, entity_posteriors, total_events, and exploration_epoch. (from audit-rest/r2/ADR-032.md)
• F178 ADR-032 (CRIT): The only brain fold is EventFold: Fold<Event, BrainState>, initialized with hardcoded recall::relevance_weight, recall::importance_weight, and recall::temporal_weight posteriors. (from audit-rest/r2/ADR-032.md)
• F179 ADR-032 (MAJ): The registered verb surface is only brain.state, brain.config, brain.events, brain.reset, and brain.emit. (from audit-rest/r2/ADR-032.md)
• F180 ADR-032 (MAJ): BrainPack stores only runtime, an in-memory Mutex, and EventFold (from audit-rest/r2/ADR-032.md)
• F182 ADR-032 (MAJ): Brain depends only on khive local crates plus serde/uuid/chrono (from audit-rest/r2/ADR-032.md)
• F183 ADR-032 (MAJ): interpret() maps raw verbs including brain.emit into a single global signal stream (from audit-rest/r2/ADR-032.md)
• F226 ADR-042 (MAJ): BrainPack exposes state/config/events/reset/emit (from audit-rest/r1/ADR-042.md)

Files affected

• crates/khive-pack-brain/src/state.rs (319 sampled LOC)
• crates/khive-pack-brain/src/fold.rs (197 sampled LOC)
• crates/khive-pack-brain/src/lib.rs (424 sampled LOC)
• crates/khive-pack-brain/Cargo.toml (27 sampled LOC)
• crates/khive-pack-brain/src/event.rs (254 sampled LOC)

Acceptance criteria

• All source findings listed above are addressed exactly once in this cluster.
• Public types, handlers, schema, and docs touched by the affected files agree on the ADR contract.
• Regression tests cover happy path and edge cases for the changed public APIs or schema behavior.
• cargo test -p khive-pack-brain passes.
• cargo clippy --workspace -- -D warnings passes.
• make ci passes.

Dependencies

• Depends on: #[ADR-007] Namespace Token and Runtime API Migration
• Depends on: #[ADR-017] Pack Verb Registry, Wire Names, and Introspection
• Blocks: none

LOC estimate

~210 lines added/70 removed; 5 existing affected file(s) sampled at 1221 current LOC via wc -l, plus 0 new/planned path(s).

Risk notes

• Same-file dependencies must merge first; dependency list includes the exact overlapping paths.
• Contains CRIT findings; do not defer without owner approval.

Auto-generated by ADR alignment triage

[ohdearquant]

Landed in main via PR #349 (integration of cluster c19 — original cluster PR was #354). Tracker complete.