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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.308 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.33 ·

Improved Session ID Validation

Entry
JSON All of v2.1.33
EntryKind: in v2.1.33,
ChangesSection of the release
What

The --session-id flag now strictly requires a valid UUID format.

Details
  • Previous: Accepted "UUID or tagged ID" (--session-id <id>)
  • New: Only accepts valid UUIDs (--session-id <uuid>)
  • Error message updated: "Must be a valid UUID" (removed "or tagged ID")
Evidence

CLI option description (search for "--session-id <uuid>")

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

See this entry in the whole of v2.1.33 →

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