learn — Distill a Skill from Anything

What it does

Say /learn and Claude reads your chosen source and distills it into a reusable skill document.

• Identify the source: a path (read the code), a URL (WebFetch), pasted text, or "what we just did" (the current conversation)
• Gather material: Glob/Read/Grep the structure and entry points; from web pages it pulls concrete commands and steps, not prose
• Distill: drop the one-off specifics, keep the repeatable procedure, the trigger, and the non-obvious gotchas
• Author: write .claude/skills/<kebab-name>/SKILL.md with required frontmatter (name, description), a ## When to use section, and a numbered ## Workflow
• Refine branch: if a skill on the topic already exists, it reads the current file and weaves new learnings into the right sections — deduping steps and fixing stale paths/flags instead of overwriting
• Place and verify: confirm folder name matches name, YAML parses, dry-run the procedure when feasible, then tell you to invoke it via /<name>

It is instruction-only: no separate engine, no extra permissions, just the tools Claude already has.

Who it's for

• Developers who refuse to solve the same problem twice
• Tech leads who want internal onboarding docs to grow automatically
• Power users building a curated Claude Code skill library

Examples

1. Capture a fresh setup: after 30 minutes wrestling a Docker + Postgres dev env into shape, run /learn what we just did → produces .claude/skills/local-db-setup/SKILL.md with the real commands and the traps you hit.
2. Guide for an unfamiliar repo: /learn ./services/billing → a skill covering the folder layout, key entry points, and how to run the tests.
3. Compress API docs: /learn https://api.example.com/docs → a usage skill with just the auth flow, required headers, and the endpoints you actually call.
4. Update an existing skill: "update the deploy skill, the release command changed" → it reads the current SKILL.md and swaps only the stale command.

Install the skill I found on Claude Skill Mart.
Copy the .claude/skills/learn folder from the GitHub repo nanocoai/nanoclaw into my ~/.claude/skills/learn/.
When it's done, tell me in one line what this skill can do.