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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 v2.1.248 ·

Crashed sessions write a structured diagnostic line to the transcript

A crashed non-interactive session writes a structured diagnostic line into the transcript.

You'll notice New Features
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Error HandlingArea: what it touches
New FeaturesKind: in v2.1.248,
New FeaturesSection of the release
What

When a non-interactive session throws, the transcript now gets a line naming the error, its API status and its cause alongside the raw messages, and in some modes the user sees a short "Session crashed" message instead of the raw error text.

Details
  • The line is prefixed [session_crash] and starts with error_name=.
  • Which sessions get the short form rather than the raw error is decided by a session check in the crash path.
Evidence

[session_crash] error_name=

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

See this entry in the whole of v2.1.248 →

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