Brummel
fc52b4fced
Architect drift review over 6c7f5dd..HEAD. No regression scripts in this project → the architect is the sole gate; verdict: shipped code byte-clean. What holds (verified against the diff): - C9 — a CostRunner<F> is a plain downstream Node; the two cost nodes are thin factors wired through the same cost_node_builder. No runtime sub-object. - C18 / byte-identity — the numerator/latched token form is preserved verbatim; the two new CLI goldens pin exact net_expectancy_r and pass; the no-cost golden is untouched. - C10 co-temporality + C23 + invariant-4 — the gate-on-PM-geometry-only rule (cold factor input → 0 cost, row still emits) is now centralized once in the runner; name() dropped cleanly (label() remains the non-load-bearing symbol); the 3-field triple is a single source (COST_FIELD_NAMES) read by both producers + CostSum + the CLI — the cycle-0082 by-convention lockstep is structurally gone. Resolution: - [fix] docs/design/INDEX.md C10 — added the cycle-0083 realization note (each prior cost cycle got one; the deferred general CostNode trait is now shipped and the lockstep eliminated). Ledger deferred-work tracking re-synced. - [fix] crates/aura-std/src/lib.rs:5 — module doc now names the CostNode/CostRunner authoring surface. - [carry-on, low debt] vol_slippage_cost.rs still declares its extra-input port twice (the cost_node_builder arg and the trait extra_inputs()); a clean unifier needs design thought (builder() is static, no factor instance) and is not worth forcing at cycle close. Documented here; agreement rests on the helper + a test + the harness debug-assert. Cycle 0083 ephemera removed (docs/specs/0083 + docs/plans/0083). Verified: cargo build/test --workspace clean (0 failures), clippy -D warnings clean, cargo doc -p aura-std clean (CostNode/CostRunner intra-doc links resolve). refs #148