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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 v2.1.221 Home All releases olderv2.1.220 v2.1.222newer

MCP tasks use raw requests instead of the experimental client helpers

Under the hood
Useful2 Signal0
MCP

MCP task results and cancellations now use standard requests instead of an experimental helper.

What

Task result fetching and cancellation no longer depend on the experimental client surface.

Details
  • both now call e.request({ method: "tasks/result", ... }) and { method: "tasks/cancel", ... } with explicit result schemas
  • replaces calls into experimental.tasks
Evidence

tasks/cancel

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

See this entry in the whole of v2.1.221 →