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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 ·

Session events are assembled by a builder before upload

Session events are now assembled by a builder before being uploaded.

Under the hood Internal Changes
JSON All of v2.1.248
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
Internal ChangesKind: in v2.1.248,
Internal ChangesSection of the release
What

The session-event sender now awaits a builder that turns the session and payload into the event object it posts, rather than wrapping the payload inline. Retry on a trusted-device token and the 300-character error truncation are unchanged, and non-first-party callers still bail out early.

Evidence

Successfully sent event to session

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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