Checkbox picker

When the user must choose over many items (100+ skills, plugins, MCP servers), don't negotiate the list in chat. Build a picker they click through, then execute from the exported JSON.

Procedure

1. Collect items programmatically from the real sources (directories, config JSON, GitHub API), never hand-typed. For skills, parse the SKILL.md frontmatter description. Record a stable id per item with a source prefix (agent:, skill:, plugin:, mcp:, pack:).
2. Group items (by source, then by cluster) and pre-check each checkbox with your recommendation. Semantics: checked = keep/install, unchecked = delete/skip. Color rows green/red so the state is scannable.
3. Include per-group "keep all"/"delete all" buttons, a name filter input, and a sticky footer with live counts plus a Download decisions button that saves {generated, keep: [ids], delete: [ids]} (or install/skip) as JSON via a Blob download.
4. Write the HTML to .scratchpad/<topic>/picker.html (call the Skill tool with "scratchpad") and open it. The user downloads the decisions file to ~/Downloads/; read it from there and execute.
5. Reuse the previous HTML as a template for round 2: swap the const ITEMS = ... JSON, retitle, and rename the download filename so decision files don't collide.

Execution gotchas (from a real skills cleanup)