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.
Read-only skill loads tell the model to hand execution to a worker
You'll notice
Useful2Signal4
Skills
Read-only skill loads now return a note saying nothing ran and a worker should execute it.
What's wrong with this entry?
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What
When a skill is loaded read-only, the tool result is now an explicit note that the instructions were loaded, nothing ran, and execution should be delegated to a worker, instead of the usual result payload.
Details
Emitted from the read-only branch of the tool-result formatter, driven by the readOnly flag on the load result.
Evidence
Nothing was executed; delegate execution to a worker.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.