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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.277 ·

Artifact publishing recognizes contract-rollout and generic rate-limit errors

Artifact publish failures now get a distinct contract_rollout error code and generic 429 responses are classified as rate-limited

Group of 2 You'll notice Improvements
JSON All of v2.1.277
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Artifact PublishArea: what it touches
ImprovementsKind: in v2.1.277,
ImprovementsSection of the release

What

Artifact publishing error handling gained two refinements:

  • Generic 429 ("too many requests") responses, beyond the existing capacity-cap case, are now classified as rate_limited and shown with a retry-after message
  • A new contract_rollout error code is added for 422 responses whose message matches a "is newer than the preferred" pattern, but only when the request declared contract:'latest' (the latestContract flag) and there's no already-known contract pin. This is treated as distinct from the existing contract_echo_rejected case

Why

These give users and logs a more accurate reason when a publish fails: a genuine rate limit versus a contract version that's being rolled out ahead of what the client expected, rather than lumping both into generic or misleading error codes.

See this entry in the whole of v2.1.277 →

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