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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 v2.1.224

Task budgets and session budgets are no longer conflated

You'll notice
Useful2 Signal3
Agent SDK Docs not in their notes

Docs now warn that task_budget is advisory tokens while session budgets are hard dollar caps.

task_budget
What

The skill's quick reference and its feature-support notes now warn that the Messages API task_budget is advisory and counted in tokens, while a Managed Agents session budget is a hard, dollar-denominated cap enforced by the platform.

Details
  • The model-tier restriction (Opus 5, Fable 5, Sonnet 5, 4.8, 4.7) applies only to the Messages API form; session budgets have no tier restriction.
Evidence

Not the same thing as Managed Agents session budgets

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 v2.1.224 →