feat: add skills list command to show installed skills

[ibrahimhajjaj]

Summary

• Add skills list command (alias: ls) to display installed skills, similar to npm ls
• Shows both project and global skills with metadata (name, description, path, linked agents)
• Supports filtering by scope (-g for global only) and agents (-a claude-code)

Usage

npx skills list          # List all installed skills
npx skills ls            # Shortcut
npx skills ls -g         # Global skills only
npx skills ls -a claude-code cursor  # Filter by agents

Output

Show local skills skills ls

Project Skills

next-best-practices ~/workspace/repros/mini/.agents/skills/next-best-practices
  Agents: Amp, Claude Code, Codex, Kimi Code CLI

Show global skills skills list -g

Global Skills

find-skills ~/.agents/skills/find-skills
  Agents: Amp, Antigravity, Claude Code, Moltbot, Cline +23 more

[huozhi]

Thanks for the contribution, I repurposed the --list-installed to a more general list cmd which can show you all the installed skills from either global or local. LGTM!