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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 v2.1.233

Todo tools switched off for several models

Use it now
Useful4 Signal5
Tools Notable

Todo tools are now off for several models unless you set CLAUDE_CODE_ENABLE_TODO_TOOLS=true.

CLAUDE_CODE_ENABLE_TODO_TOOLS
What

A new check decides per model whether the todo tools are offered. For opus 4/8, sonnet 5, fable 5 and mythos 5 they are off unless CLAUDE_CODE_ENABLE_TODO_TOOLS=true or the tengu_rosy_wren gate is on; the gate falls back to off when the server has no value. Any other or unknown model keeps them on.

Details
  • The same check now also guards the todo reminder attachment and the deferred todo tool, so those follow the tools.
Evidence

tengu_rosy_wren

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 v2.1.233 →