phuryn/pm-skills

This issue reveals a critical user experience and integration failure: the inability to add the `pm-skills` marketplace to Claude Desktop via the Cowork plugin UI. The 'Failed to add marketplace' error, despite following documented steps and attempting both shorthand and full GitHub URLs, indicates a fundamental breakdown in the integration mechanism. Potential root causes include input format validation, network access issues, or GitHub API rate limiting. This directly impedes user adoption of `pm-skills` and undermines the value proposition of Claude Desktop as an extensible platform. Such integration friction creates significant barriers for B2B users attempting to leverage agentic skills, highlighting a need for robust, user-friendly marketplace integration.