Unclear Which marketplaces count as official, and exactly when the fallback applies, is not stated.
A plugin adds commands, skills or other features to Claude Code. When you install one by name alone, without saying which marketplace it comes from, the copy may be fetched from a folder or a Git source. If that fetch fails, because Git is missing or the download failed, and no copy is installed yet, Claude Code now installs the official marketplace's copy instead. Before, the install failed with an error.
Claude Code does not fall back when another installed plugin requires a particular version of that plugin. It logs why it did or did not fall back.
Installs that used to fail on a missing Git or a failed fetch can now succeed, but with a copy from a different source than you may have expected. If you rely on a particular copy of a plugin, check which one was installed.
Which marketplaces count as official, and exactly when the fallback applies, is not stated.