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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.281 ·

Non-retryable 4xx classifier helper

A helper was added that treats 4xx error responses other than 408, 409 and 429 as not worth retrying

Entry
JSON All of v2.1.281
EntryKind: in v2.1.281,
ChangesSection of the release
What

A new helper sorts server error responses. It treats status codes in the 400s as one group, except for these three:

  • 408, a timeout
  • 409, a conflict
  • 429, too many requests

New helpers that read environment variables were also added. They strip spaces from the start and end of each value.

Why

Errors that retrying will not fix can be told apart from ones that may succeed on a second try.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say where the new helper is used.

See this entry in the whole of v2.1.281 →

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