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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 v2.1.225 Home All releases olderv2.1.224 v2.1.226newer

Workshop authoring-progress hooks fire during streaming

Not switched on
Useful1 Signal2
Artifacts not in their notes

Streaming now feeds tool and partial-input events to the workshop progress display.

Streaming callbacks into the workshop authoring-progress module exist but only run when an internal workshop-mode predicate passes.

CLAUDE_WORKSHOP_PROGRESS
What

Streaming now emits tool-use and partial-JSON callbacks into a workshop authoring-progress module, which is off unless internal workshop mode applies.

Details
  • onToolUseStart is called on a content_block_start for a tool use.
  • onInputJsonDelta is called on each partial JSON delta.
  • The module is only consulted when enabled, which requires an internal workshop-mode predicate.
  • Setting CLAUDE_WORKSHOP_PROGRESS to false switches it off.
Evidence

CLAUDE_WORKSHOP_PROGRESS

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

See this entry in the whole of v2.1.225 →