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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.221

Fast mode credit rejections show a notification instead of silently turning fast mode off

You'll notice
Useful4 Signal0
Models

Fast mode stays on and shows an error notification when credit limits reject overage.

fastMode
What

When the server rejects fast-mode overage for a credit-limit reason, the fastMode user setting is left alone and you get an error notification explaining why.

Details
  • Applies to reasons out_of_credits, org_spend_cap_reached and org_level_disabled_until.
  • Posts an immediate error notification keyed "fast-mode-overage-rejected" carrying the human-readable reason.
  • Repeats within the same turn are suppressed.
  • Rejections for any other reason still disable fast mode as before.
Evidence

Fast mode credits rejection already surfaced this turn, suppressing repeat

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.221 →