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Sweep 28 Aug 2026 · 16:06Z Build v2.1.251 479 read Stable v2.1.236 Latest v2.1.251 Next v2.1.251 Feeds RSS JSON llms.txt

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.

Prompt capture

AskUserQuestion tool description

27 model strings share this prompt, byte for byte.

v2.1.152 13 lines 960 chars sha256 5b575c3d70cd Plain text Whole capture

This renders the markdown inside the description, so it isn't quite the description itself. The raw view and the plain text are the bytes as they were sent.

Use this tool when you need to ask the user questions during execution. This allows you to:

  1. Gather user preferences or requirements
  2. Clarify ambiguous instructions
  3. Get decisions on implementation choices as you work
  4. Offer choices to the user about what direction to take.

Usage notes:

  • Users will always be able to select "Other" to provide custom text input
  • Use multiSelect: true to allow multiple answers to be selected for a question
  • If you recommend a specific option, make that the first option in the list and add "(Recommended)" at the end of the label

Plan mode note: To switch into plan mode, use EnterPlanMode (not this tool). Once in plan mode, use this tool to clarify requirements or choose between approaches BEFORE finalizing your plan. Do NOT use this tool to ask "Is my plan ready?", "Should I proceed?", or otherwise reference "the plan" in questions — the user cannot see the plan until you call ExitPlanMode for approval.