Replaces the W-026 501 stub. Re-executes a journaled prompt in a sealed
fresh runtime (ChatRuntime(no_load_state=True): no checkpoint load, no
checkpoint write, no proposal lineage) and compares the envelope
leaf-by-leaf against the recorded TurnJournalEntry.
Design correction vs the scoping doc (amended in-doc): journaled turns
each ran in a fresh ChatRuntime(), never one continuous session, so
genesis-PREFIX replay would manufacture spurious divergence; shipped
basis is sealed_fresh_runtime_single_turn (O(1)). origin_state:
"unrecorded" — the journal does not record whether the original turn's
runtime loaded a checkpoint, so divergence is reported as nondeterminism
OR origin-state influence, never disambiguated.
- workbench/replay.py: pure comparison + injected executor; every
TurnJournalEntry field classified critical/informational exactly once
(exhaustiveness enforced by test)
- api.py: route wiring under _CHAT_TURN_LOCK; runtime failure -> 500
runtime_unavailable, no comparison may be fabricated
- schemas: additive TurnReplayComparison/TurnReplayDivergence (W-026
artifact-keyed pair retires with the frontend Replay Moment PR)
- tests: 10 obligations incl. tamper-prompt, tamper-leaf precision,
no-execution-no-comparison, no-trace (journal + engine_state bytes),
wall-clock tolerance, sealed-construction proof
- snapshot regenerated; NOT_YET_MIRRORED debt entries for the two new
classes (mirrors land with the frontend PR)
- api-contract-v1.md § Replay rewritten for the turn-keyed shape
- EvidenceChainRail: the spine's seven stages rendered per subject with
the honesty contract — lit/hollow/dim derive ONLY from carried fields
(a trace hash lights 'replay' as RECORDED, never as verified); pure
deriveStages() with meaningfully-fail tests (remove one field -> exactly
its stage hollows).
- Hash display standard: DigestBadge default 12-char + copy everywhere;
CopyableHash consolidated away (2 call sites swapped, file deleted).
- Typography: tabular-nums on MetadataTable values + eval metrics;
text-wrap balance on Panel titles + EmptyState statements.
- Selection unification: new --color-selected-bg/-border tokens; selected
(persistent) vs focused (transient) now visually distinct across
Proposals/Replay/Evals lists; focus-ring no longer doubles as selection.
- EmptyState gains a deterministic monochrome inline-SVG glyph.
- Panel adopted in Evals lane list + Proposals queue.
- Doctrine-as-tests: hexScan (no palette literals outside tokens.css/
generated tokens.ts) + schemaDrift gate (scripts/dump-schemas.py AST
walk -> schema-snapshot.json -> every dataclass field mirrored in
types/api.ts; explicit shrink-only NOT_YET_MIRRORED debt list).
The drift gate caught real drift on first run: ChatTurnResult.turn_id
existed in Python, missing from TS — now mirrored.
Verified: build green; vitest 36 files / 279 tests EXIT=0; playwright
12/12; dump-schemas.py runs clean.
