Adds referent tracking, session graph traversal, unknown-domain gating, correction propagation, compositional surface assembly, and regression coverage.
Follow-up fixes included before merge:
- split probe/commit/finalize turn flow so unknown-domain checks run before current-query vault writes
- record real input tokens and input versors for sync and async session paths
- return true graph distances from backward walks and consume them in correction decay
- synchronize corrected graph outputs into vault-backed recall and live referent state
- regenerate correction responses from corrected context rather than correction text
- keep coreference pronouns lowercase in question bodies
- centralize elaboration-string construction to avoid plan/surface drift
- add targeted dialogue fluency regression tests
- restore articulation surface as ChatResponse.surface while retaining walk_surface telemetry
- calibrate moderate E2 energy boundary
- reclose generated field states after propagation and recall
- restore pytest-safe REPL parsing and field_walk helper
- anchor proposition predicate selection to prompt field
- make vault exact self-recall deterministic
- align chat telemetry regression with restored surface contract
Three surgical import changes. No behavior change. No new semantics.
Backend decides Rust vs pure-Python transparently.
- field/propagate.py: versor_apply <- algebra.backend
- vocab/manifold.py: cga_inner <- algebra.backend
- vault/store.py: recall loop replaced with vault_recall() from
algebra.backend; public result shape preserved ({versor, score,
metadata, index}). null_project stays on algebra.cga (not the
recall hot path). store() and reproject() unchanged.
Rust path for vault_recall uses Rayon parallel scan and releases
the GIL. Python fallback is sequential and behaviorally identical.
No batching introduced; that is Commit 3+.
