What probably matters to youSection of the release
What
A bundled skill publishes a self-contained drawing canvas as an artifact. You sketch on it, press Send to Claude to republish it, and Claude answers by adding its own elements in orange ink.
Details
Claude's additions go through a merge-state.mjs helper rather than rewriting the board, so your strokes survive its edits.
Board state is a small JSON structure ({v, els, savedAt, pingCount, ping}); marks that have already been answered are retired so the board does not accumulate stale annotations.
The skill may offer itself unprompted at most once per session.
Everything read off the board is treated as untrusted data, not as instructions to follow.
Whether it is offered at all depends on skill loading in your setup.
Evidence
name: whiteboard
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
