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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 ·

Ultrareview launch failures carry a named tag

Failed ultrareview launches are tagged so the cause shows up in logs.

Under the hood Improvements
JSON All of v2.1.248
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Code ReviewArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What

When an ultrareview session fails to start, the error reply is now tagged ultrareview_launch rather than being a generic failure, so the cause is identifiable in logs.

Evidence

ultrareview_launch

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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