Auto Skill Generator

---
name: auto-skill-generator
description: >
  Generate skills from web research. Given a topic like "how to use Stripe API"
  or "Prisma ORM", this skill searches for authoritative documentation, crawls the best source,
  and generates a ready-to-use .md skill file. Use when: (1) User wants to create a skill
  about a library/tool/API, (2) User says "create a skill for X", "make a skill about X",
  or "generate skill for X", (3) User wants to capture documentation as a reusable skill.
---

# Auto Skill Generator

Generate skills by researching and crawling authoritative documentation.

## Tool: fetch_docs.py

```bash
# Search - returns all URLs with snippets
python scripts/fetch_docs.py search "Modal GPU Python documentation"

# Crawl - with domain/path filtering to stay focused
python scripts/fetch_docs.py crawl \
  --url https://modal.com/docs/guide/gpu \
  --no-external \
  --select-paths "/docs/.*" \
  --instructions "Focus on GPU setup and code examples" \
  --limit 30
```

## Workflow

### 1. Search for Documentation

```bash
python scripts/fetch_docs.py search "{topic} documentation"
```

Returns JSON with all URLs, titles, scores, and content snippets.

### 2. Select Best URL

Review search results and select based on:
- **Official docs**: `*.com/docs/`, `docs.*.com`, `*.readthedocs.io`
- **Content relevance**: Check snippets for API docs, code examples
- **Avoid**: Blog posts, changelogs, marketing, glossaries

### 3. Crawl with Filtering

```bash
python scripts/fetch_docs.py crawl \
  --url {selected_url} \
  --no-external \
  --select-paths "/docs/.*" "/guide/.*" \
  --instructions "Focus on API methods and code examples"
```

**Core Parameters:**
| Parameter | Description |
|-----------|-------------|
| `--url` | Required. URL to crawl |
| `--instructions` | Natural language guidance for crawler |
| `--limit` | Total pages (default: 50) |
| `--max-depth` | Link depth (default: 2) |

**Domain/Path Filtering (Critical):**
| Parameter | Description |
|-----------|-------------|
| `--no-external` | Block external domains |
| `--select-paths` | Regex patterns to include (e.g., `/docs/.*`) |
| `--exclude-paths` | Regex patterns to exclude (e.g., `/blog/.*`) |
| `--select-domains` | Regex for allowed domains |
| `--exclude-domains` | Regex for blocked domains |

**Quality Options:**
| Parameter | Description |
|-----------|-------------|
| `--extract-depth` | `basic` (1 credit/5 URLs) or `advanced` (2 credits/5 URLs) |
| `--format` | `markdown` or `text` |
| `--timeout` | Seconds (10-150, default: 150) |

### 4. Generate Skill File

From crawled content, create:

```markdown
---
name: {topic-slug}ß
description: >
  {What the skill does}. Use when: {specific triggers}.
---

# {Topic Name}

## Quick Start
## Core API
## Common Patterns
```

## Output

- Location: `~/.claude/skills/{topic-slug}/SKILL.md`
- Extract ALL code blocks from crawled content
- Keep SKILL.md under 500 lines; split to `references/` if longer