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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.

← All of v2.1.251 Home All releases ←olderv2.1.250
Claude Code v2.1.251

Elicitation dialog can be told to refuse an Accept

Under the hood
Useful2 Signal2
MCP

MCP input dialogs can now reject your Enter for custom reasons.

What

The dialog that MCP servers use to ask you for input takes an extra callback that is consulted when you press Enter, so the code opening the dialog can refuse the submission for reasons beyond the built-in required-field checks.

Details
  • If the caller always allows it, the dialog behaves exactly as before.
Evidence

accepts

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 v2.1.251 →