Brummel
724ad66f65
Architect drift review over d566fed..a476049 (core-streaming-substrate): no drift, no debt. The shipped substrate matches the ledger: - C7: closed four-kind Copy-POD Scalar, no dyn Any / no heap on the hot path, AnyColumn type-erased edge with the kind-check at push and a monomorphic bypass; wrong-kind push rejected leaving the column untouched. - C8: Column pre-sized via with_capacity (Box<[T]>, never realloc), financial index 0=newest, zero-copy Window, None on cold/out-of-range read. - C5/C1: run_count is the per-series push counter (canonical glossary term; total_count appears only as explicit RustAst-historical reference), monotonic, never moved by a read; no RefCell/Rc/Arc/unsafe, push is &mut and read is &. - Out-of-scope discipline kept: no Node/Ctx/firing/sim-loop/ingestion/OHLCV leaked in; lib.rs exports exactly the seven promised items. Regression gate: profile commands.regression is empty — no-op; architect is the sole gate and is green. carry-on. Forward note (not drift): AnyColumn has write-side as_*_mut accessors but no symmetric read-side &Column / type-erased read-window — the freshness/read loop in the Ctx cycle will need that counterpart. Expected next-cycle scope. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>