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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v1.0.120 ·

Session Log Transcript Format

Entry
JSON All of v1.0.120
EntryKind: in v1.0.120,
ChangesSection of the release

What: Session log transcripts now include a fileHistorySnapshots field in addition to existing fields.

Format change:

{
  date, messages, fullPath, value, created, modified,
  firstPrompt, messageCount, isSidechain, leafUuid,
  summary, checkpoints,
  fileHistorySnapshots,  // NEW
  gitBranch
}
Evidence

cRB() function at line 438159, new parameter at line 438184

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v1.0.120 →

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