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

The multiplayer whiteboard is registered as its own gated variant

Not switched on
Useful2 Signal4
Artifacts

The multiplayer canvas is registered separately from the single-player whiteboard with its own switch.

The multiplayer whiteboard has its own on/off condition rather than sharing the existing one.

What

The multiplayer canvas is a separate skill registration sitting next to the existing single-player whiteboard, with its own on/off condition rather than sharing the old one.

Details
  • The single-player whiteboard's condition has two parts; the multiplayer one adds a third check on top of the same shared middle check.
  • Several unrelated functions in the bundle share the minified names used in these conditions, so which definitions apply here, and therefore the effective default, is not pinned down.
Evidence

Create a multiplayer whiteboard artifact - a live sketch canvas for wireframe-fidelity diagrams

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

See this entry in the whole of v2.1.251 →