fix(cowork): retry incomplete transcript records across polls - #373
DivyamTalwar wants to merge 2 commits into
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Keep an unparseable final JSONL record below the transcript watermark until the producer finishes writing it, while retaining the existing skip behavior for malformed newline-terminated records. Constraint: Cowork transcripts are appended incrementally and may split UTF-8 records across polls Rejected: Advance every parse failure | would permanently lose a record that is still being written Confidence: high Scope-risk: narrow Reversibility: clean Directive: Keep transcript-tail handling tied to the final unterminated record only Tested: Native Vitest regression 3/3; affected Cowork suite excluding pre-existing macOS fixture failures; npm run typecheck; npm run build Not-tested: Live Cowork, Deeplake cloud, and real agent spawners
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Understand this PR’s impact Explore downstream dependencies and potential security impact with Blast Radius. 📝 WalkthroughWalkthroughThe ingestion logic now retains the watermark for an unparseable final transcript record without a trailing newline. New tests cover appended record data, split UTF-8 sequences, malformed lines, and independent session progress. ChangesCowork ingestion
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Suggested reviewers: Fixed issue severity: <fixed_issue_severity>Medium</fixed_issue_severity> Merge Risk: 🔵 Low · up to The partial-record behavior is covered, but the test should assert the saved watermark before merge so a regression in the persisted retry boundary is detected directly. 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
Full details: Linked Issues checkExplanation The implementation in
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Inline comments:
In `@tests/claude-code/cowork-ingest-partial-record.test.ts`:
- Line 119: Update the state assertion in the partial-record ingest test to
parse the saved cowork-ingest state JSON and assert that processedLines[path]
equals 2, preserving the expected watermark behavior for the valid and skipped
lines while excluding the incomplete tail.
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src/mcp/cowork-ingest.tstests/claude-code/cowork-ingest-partial-record.test.ts
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Summary
Fixes #372.
Cowork can read a JSONL transcript while its writer has emitted only part of the final JSON record. The existing parse-failure path advances processedLines past that unterminated tail. Completing the same line later does not increase the line count, so future polls skip the message permanently.
Change
Retain the watermark only for an unparseable final record without a terminating newline. Valid JSON without a final newline is still processed; malformed newline-terminated records retain the existing skip behavior. Earlier complete records and independent transcripts continue to progress.
Regression evidence
All three new real-file regressions fail on unchanged production code and pass on the patch. They drive the public ingestion path through split writes and repeated polling, including complete no-newline JSON, CRLF/blank lines, a split UTF-8 sequence, independent transcript progress, and no duplicate upload of earlier records. Network and worker execution are mocked; actual filesystem and production parsing/watermarks are exercised.
Version Bump
No release is requested from this contributor PR. Package versions and the lockfile are unchanged.
Test plan
4eb32cabe026b6eab177352986bdc4430b5104e8passes the full Node 22/Linux suite with coverage: 5,852 tests passed, zero failed, zero skipped.Exact commands, logs, and validation artifacts. This is an independent branch gate, not a result borrowed from a stacked feature branch.
The linked run validates the current test-review follow-up at the exact PR head, including persisted watermark assertions, rather than reusing the original commit result. Use job
cowork-partial-record-review.Limits
This does not redesign transcript rotation, truncate/rewrite recovery, cross-workspace queue identity, redaction, or real agent lifecycle behavior. It is independent of the existing redaction PR #363. An older equivalent branch in my fork is not being submitted separately.
The full isolated macOS baseline is not clean (19 failures and 10 skips before these changes); a clean full macOS suite is not claimed. Local scoped evidence and the full Linux gate are reported separately. Regression tests use synthetic files and mocked network/worker boundaries, not real user credentials, customer transcripts, or live model calls.
Summary by CodeRabbit
Bug Fixes
Tests