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fix(snapshot): preserve packed chunk timing on refresh

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This commit is contained in:
Tianyi Cui
2026-07-22 20:56:27 +08:00
parent 5eb4297758
commit 4529a22e85
4 changed files with 61 additions and 4 deletions
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packages/support/acp-snapshot/src/suite.ts
+22 -2
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@@ -451,6 +451,25 @@ function preserveFixtureVolatiles(record: Record<string, unknown>, existing: Rec
return
}
if ('time' in record && 'time' in existing) record.time = existing.time
if (
(record.type === 'text-chunks' || record.type === 'reasoning-chunks' || record.type === 'tool-call-chunks')
&& 'time0' in record && 'time0' in existing
) {
record.time0 = existing.time0
const data = record.data
const existingData = existing.data
if (data !== null && typeof data === 'object' && existingData !== null && typeof existingData === 'object') {
const gaps = (data as { dt?: unknown }).dt
const existingGaps = (existingData as { dt?: unknown }).dt
// Equal arity means every preserved gap still belongs to the same fresh
// chunk position. Payload arrays remain fresh because their boundaries
// are meaningful replay behavior, not volatile timing.
if (Array.isArray(gaps) && Array.isArray(existingGaps) && gaps.length === existingGaps.length) {
const preservedGaps = existingGaps as unknown[]
(data as { dt: unknown[] }).dt = [...preservedGaps]
}
}
}
if (record.type !== 'hook/result') return
const data = record.data
const existingData = existing.data
@@ -466,8 +485,9 @@ function preserveFixtureVolatiles(record: Record<string, unknown>, existing: Rec
/**
* Rewrite a fresh replay-produced log so repeated refreshes do not churn
* volatile fixture fields. Meaningful event payloads come from `fresh`; the
* existing fixture lends session ids, cwd, creation times, event times, and
* hook durations where the record shape still matches.
* existing fixture lends session ids, cwd, creation times, event times,
* packed-run anchors and same-arity gaps, and hook durations where the record
* shape still matches.
*
* @param fresh The newly harvested session JSONL.
* @param existing The committed fixture JSONL being refreshed.