Bug: 6 of 7 skills not registering in Cowork — `ckm:` prefix in SKILL.md name field breaks plugin skill discovery

[NickyStaffs29]

Problem

When installing the ui-ux-pro-max plugin in Claude Desktop's Cowork mode, only 1 out of 7 skills registers and appears in the available skills list. The plugin shows up under Plugins, but 6 skills are invisible and unusable.

Working skill: ui-ux-pro-max (shows up correctly)
Broken skills: banner-design, brand, design, design-system, slides, ui-styling (do not register)

Root Cause

The working skill has a simple name field in its SKILL.md frontmatter:

name: ui-ux-pro-max

The 6 broken skills all use a ckm: prefix:

name: ckm:banner-design
name: ckm:brand
name: ckm:design
name: ckm:design-system
name: ckm:slides
name: ckm:ui-styling

The colon (:) in the name conflicts with how the Cowork plugin system namespaces skills internally (it uses plugin-name:skill-name format). The ckm: prefix likely causes the skill registration parser to fail silently.

Suggested Fix

Remove the ckm: prefix from the name field in each SKILL.md:

• ckm:banner-design → banner-design
• ckm:brand → brand
• ckm:design → design
• ckm:design-system → design-system
• ckm:slides → slides
• ckm:ui-styling → ui-styling

Files to Update

• .claude/skills/banner-design/SKILL.md
• .claude/skills/brand/SKILL.md
• .claude/skills/design/SKILL.md
• .claude/skills/design-system/SKILL.md
• .claude/skills/slides/SKILL.md
• .claude/skills/ui-styling/SKILL.md

Environment

• Claude Desktop (Cowork mode)
• Plugin installed from GitHub marketplace
• Tested April 2026