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deepseek-harness/packages/llm/token-meter/tests
Tianyi Cui eba829784b fix(token-meter): invalidate header-based breakdown caches
Address ds-review-bot thread 3921300994 (PRRT_kwDOS3Pfcs6eyLsu). contextBreakdown now folds system/message instead of request/header.system, so version-2 checkpoints have different semantics even though their numeric fields still pass the current schema. Bump the lower projection to stateVersion 3 so cache-only reads omit old values and restore replays the full log; derived caches are not covered by the Session-log persistence compatibility waiver. No migration or fallback is added.

Regression seeds a schema-valid v2 row at the current watermark with stale system/message prices. Before the bump, cache views returned it, restoreFloor selected seq 2 rather than 0, and restore retained system=0/message=17 instead of system=8/message=9. After the bump, the 13-test owning suite passes and exact src/breakdown-projection.ts coverage is 100% statements, branches, functions, and lines; refreshed rows equal a fresh fold at version 3. Existing token-meter README prose documents the current system/message fold without a version literal, so it needs no edit.

Propagation requirement: the upper layer already uses version 3 for a different compact cache representation. Advance that layer to version 4 when propagating this fix to avoid assigning one version to two schemas.
2026-09-06 20:44:39 +08:00
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