flake: J2 journey reads an invalid live journal record under Node #1089

Failure

packages/cli/tests/repl-agent-journey.test.ts: J2 “complete, streaming and queued are one frame, and filtering changes only Sessions” fails while inspecting an actively changing entry journal.

First Node failure, run2373 shard12/16, signed commit 1e2edbfd992d051cc212df74408d8015b77a449b, Node22.23.4/Linux:

MalformedDurableEventError: expected a JSON record at $
parseRecord → parseDurableEvent → journal (repl-agent-journey.test.ts:1712)
→ awaitedFact (repl-agent-journey.test.ts:1113)

The complete first job output is retained before any repair or CI rerun. This job's other J2/TL10 controls pass.

Unchanged-head evidence

One focused invocation of the existing J2 test at the same unchanged commit passes under Node22.23.2/macOS, exit0,1,984ms:

node_modules/.bin/tsx --tsconfig tsconfig.node.json --test --test-concurrency=1 --test-name-pattern 'J2: complete, streaming and queued' packages/cli/tests/repl-agent-journey.test.ts

The command joins and the checkout remains clean. This is a different selection/platform/patch runtime, not an identical CI command passing unchanged. A green rerun alone does not resolve this report.

Investigation boundary

journal() reads entryHistory, splits all nonempty lines and immediately parses them. awaitedFact retries a false observation but propagates parsing failures. The test releases streaming work immediately before reading the live journal. A partially appended final record is plausible; the actual offending raw line was not captured, so that cause remains provisional.

The correction must preserve the three retained agent_prompt assertion and rejection of malformed complete records. Prefer supported read/settlement APIs; do not blanket-catch parse errors, increase deadlines, exclude the runtime/test or alter unrelated production behavior.

The #1081 workflow's three source corrections are exhausted; an explicit additional bounded repair is requested separately. No repair or CI retry has been dispatched. Keep open until a demonstrated cause and regression evidence are landed.

Retained evidence

Root /private/tmp/xmd-standard-acp-1081-20261102-1:

• ci-final-failure-1/job-125907781794.log and first-fetch.json
• journal-flake-check-1/test.log, test-result.json, and source/environment receipts
• submit-journal-flake-check-1/result.json: actual joined ACP execution
• ci-final-failure-1/repair-request.md

Tracking marker: 1081-j2-live-journal-parse.