Local Claude Code plugin testing requires refreshing both the marketplaces and cache directories

To test a local edit to a Claude Code plugin without cutting a release, copying into only ~/.claude/plugins/marketplaces/<name>/... is insufficient; Claude Code also reads from ~/.claude/plugins/cache/<plugin>/<version>/... and will serve stale content from there. Deleting the cache path for files you renamed is necessary, not optional. Restart Claude Code after the copy to force a reload.

When iterating on a Claude Code plugin locally, sync edits into both ~/.claude/plugins/marketplaces/<name>/... and ~/.claude/plugins/cache/<plugin>/<version>/..., delete removed files from both, and restart Claude Code before retesting.