Custom skills not visible in slash commands or Settings > Skills UI

Description

Custom skills installed at ~/.claude/skills/<name>/SKILL.md are loaded by Claude Code (appear in system prompt, auto-trigger works), but do NOT appear in:

1. Slash command autocomplete (/<skill-name>)
2. Settings > Custom > Skills UI

Expected Behavior

Valid custom skills should be discoverable in both slash command autocomplete and the Skills settings panel.

Actual Behavior

• Skill IS recognized internally (listed in system prompt, auto-trigger works correctly)
• Skill is NOT visible in slash command list
• Skill is NOT listed in Settings > Skills

Steps to Reproduce

1. Install a custom skill at ~/.claude/skills/kuma-picker/SKILL.md
2. Start Claude Code
3. Confirm skill loads (it appears in system prompt and auto-triggers)
4. Type / — skill does not appear in autocomplete
5. Open Settings > Skills — skill is not listed

Environment

• Windows 11 Pro 10.0.26200
• Claude Code (latest)
• Shell: bash