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.
Marketplace names now reject path traversal patterns — names containing /, \, .. sequences, or consisting of just . are rejected with a clear error message.
Evidence
Path traversal validation (search for 'Marketplace name cannot contain path separators')
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.