Source Intelligence

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 v2.1.198 Home All releases olderv2.1.197 v2.1.199newer

control_request_progress Messages

A new control_request_progress system message type provides progress updates for long-running client-originated control requests.

Details
  • Currently applies to side_question control requests
  • Status values: "started" (worker accepted and launched) and "api_retry" (includes retry counters)
  • Correlated by request_id
Evidence

Schema description (search for "@internal Progress for a long-running client-originated control_request")

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

See this entry in the whole of v2.1.198 →