{"version":"2.1.281","anchor":"worker-journal-detects-files-written-by-a-newer-build","canonical_anchor":"worker-journal-detects-files-written-by-a-newer-build","heading":"Worker journal detects files written by a newer build","tier":"internal","area":"Elsewhere","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281\/e\/worker-journal-detects-files-written-by-a-newer-build","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.281","markdown":"### Worker journal detects files written by a newer build\n\nThe worker journal can now tell when a file was written by a newer build of Claude Code\n\n**Unclear.** The finding does not say what Claude Code does once it detects such a file.\n\n**What**\n\nThe worker journal, a record file kept by internal worker processes, gained `writtenByNewerBuild`. It reports true when reading the file fails with the reason `unsupported_version`.\n\n**Why**\n\nIn practice, a journal file from a newer build can now be recognised as such, rather than looking like an ordinary unreadable file.\n\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 2\/5"}