Marketplaces refused for imitating an Anthropic name now get a specific error and removal steps

What

A plugin marketplace is a catalog that Claude Code installs plugins from. Claude Code already refused marketplace names that imitate an official Anthropic or Claude marketplace, but the refusal surfaced as a generic "Failed to load marketplace" error, and the cache-miss message suggested running /reload-plugins. Now the refusal is reported as its own case:

• The error reads: Claude Code refuses the marketplace name "": it looks like one of Anthropic's own. Reloading won't help. Other load failures keep the generic "Failed to load marketplace" text.
• The message explains how to remove the marketplace: a plugin marketplace remove command, or /plugin then Marketplaces.
• If the marketplace is declared in a settings file, it adds "it is declared in a settings file: to keep it, rename it there". Otherwise it adds "if its maintainer renames it, update it instead".
• It warns that removing a marketplace uninstalls its plugins and deletes their saved data.
• The failure is recorded with nameRefused, plus nameRefusedDeclaredInSettings when the marketplace came from settings. The reader for cached marketplaces tracks refusals the same way.
• Load failures flagged nameRefused are excluded by the check that decides whether a plugin error is shown or counted, as untrusted reserved names already were.

Why

A marketplace posing as an Anthropic one will not load however many times you reload. The message now says so and tells you what to do instead.