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name: search-skill description: Crawl Dart/Flutter official documentation sites and save directly to PostgreSQL (Supabase). Documents and crawling state are stored in the crawled_documents table. IMPORTANT - All content must be fetched and saved in ENGLISH ONLY. Use this skill when (1) "/search <site>" or "/search <URL>" command is executed, (2) collecting official docs from dart.dev, docs.flutter.dev, etc., (3) Stage 1 data collection tasks. user-invocable: true

Dart/Flutter Documentation Collection Skill (Stage 1)

Purpose

Handle Stage 1 data collection for the FAI project. Use WebFetch and WebSearch tools to crawl official documentation sites and save directly to PostgreSQL (Supabase) crawled_documents table.

Requirements: .environments file must exist in the project root with Supabase connection info.

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⚠️ CRITICAL: English-Only Data Rule ⚠️

All data MUST be searched and saved in English only.

Rule	Description
Search Language	Always search and fetch content in English
Save Language	All content must be written in English
WebFetch Prompt	Use English prompts when fetching pages
DB Content	No Korean or other languages in saved content

Why English only?

• LLM training data should be consistent in language
• Official Dart/Flutter documentation is primarily in English
• Ensures uniform tokenization during model training

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Usage

/search <site>              # Crawl entire site
/search <URL>               # Fetch specific page only

Examples:

/search dart.dev            # Crawl all of dart.dev
/search docs.flutter.dev    # Crawl Flutter documentation
/search https://dart.dev/language/variables   # Specific page only

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Target Sites

Site	Command	Priority
dart.dev	/search dart.dev	1 (Highest)
docs.flutter.dev	/search docs.flutter.dev	2
api.flutter.dev	/search api.flutter.dev	3
api.dart.dev	/search api.dart.dev	4
pub.dev	/search pub.dev	5

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Execution Procedure

Step 1: Generate Seed URL List

Generate seed URL list for each domain using extract_data.py --sitemap:

uv run python .claude/skills/search-skill/scripts/extract_data.py --sitemap dart.dev

Step 2: Fetch Each Page with WebFetch

Fetch content for each URL using WebFetch tool.

⚠️ IMPORTANT: Always use English prompts:

WebFetch: https://dart.dev/language/variables
Prompt: "Extract the complete content of this page in Markdown format. Include all code examples and explanations in English."

Step 3: Save to PostgreSQL

Save WebFetch results directly to DB using extract_data.py:

# Save single page to DB
uv run python .claude/skills/search-skill/scripts/extract_data.py \
  --url "https://dart.dev/language/variables" \
  --content "WebFetch result..."

# Or batch process with JSON
echo '[{"url": "...", "content": "..."}]' | \
  uv run python .claude/skills/search-skill/scripts/extract_data.py

Step 4: Check Collection Status

# Overall status (DB query)
uv run python .claude/skills/search-skill/scripts/extract_data.py --status

# Status for specific domain
uv run python .claude/skills/search-skill/scripts/extract_data.py --status --domain dart.dev

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extract_data.py Script

Main Options

Option	Description
--url, -u	URL of page to save
--content, -c	Page content (Markdown)
--title, -t	Page title (optional)
--input, -i	Input JSON file (- for stdin)
--sitemap, -s	Generate seed URL list for domain
--status	Display collection status (DB query)
--domain, -d	Filter by specific domain
--links	Extract links from content
--json	Output in JSON format

Usage Examples

# Generate seed URL list (no DB connection needed)
uv run python extract_data.py --sitemap dart.dev

# Save single page to DB
uv run python extract_data.py --url "https://dart.dev/language" --content "..."

# JSON input from stdin
echo '{"url": "...", "content": "..."}' | uv run python extract_data.py

# Collection status (DB query, including uncollected URLs)
uv run python extract_data.py --status --domain dart.dev --json

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DB Storage (crawled_documents Table)

Documents and crawling state are stored in a single crawled_documents table in PostgreSQL (Supabase).

Table Schema

Column	Type	Description
id	INTEGER	Primary key
url	TEXT (UNIQUE)	Original URL
domain	TEXT	Domain (e.g., dart.dev)
url_path	TEXT	URL path (e.g., /language/variables)
title	TEXT	Page title
content	TEXT	Markdown content
content_hash	TEXT	MD5 hash (change detection)
content_size	INTEGER	Content size in bytes
status	TEXT	pending, completed, failed
error	TEXT	Error message on failure
first_crawled	TIMESTAMP	First crawl time
last_crawled	TIMESTAMP	Last crawl time
crawl_count	INTEGER	Total crawl count

ORM Model

Defined in distributed/server/models.py as CrawledDocument class.

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Crawling Workflow (Claude Execution)

1. Generate Seed URLs: Create URL list for target domain

   uv run python extract_data.py --sitemap dart.dev
   

2. Check Already Collected: Query DB for completed URLs

   uv run python extract_data.py --status --domain dart.dev
   

3. Iterative Crawling: For each URL:

   • Check status in DB (skip if already completed)
   • Fetch content with WebFetch (English prompt required)
   • Save to DB via extract_data.py (UPSERT: insert or update)

4. Link Discovery: When new links found in WebFetch results:

   • Check if URL already exists in DB
   • If not, fetch and save

5. Check Progress: Review collection status via DB statistics

   uv run python extract_data.py --status --domain dart.dev
   

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Crawling Guidelines

1. Respect robots.txt: Check each site's crawling policy
2. Request Interval: Use appropriate delays to prevent server overload
3. Prevent Duplicates: DB UNIQUE constraint on URL prevents duplicates
4. Error Handling: Log failed URLs and implement retry logic
5. English Only: Always fetch and save content in English

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Supported Domain URL Lists

dart.dev (60+ URLs)

Main sections: /language/*, /libraries/*, /tutorials/*, /effective-dart/*, /tools/*

docs.flutter.dev (45+ URLs)

Main sections: /get-started/*, /ui/*, /development/*, /testing/*, /deployment/*

api.flutter.dev (30+ URLs)

Main classes: StatelessWidget, StatefulWidget, Container, Text, Row, Column, Material/Cupertino widgets

api.dart.dev (15+ URLs)

Main libraries: dart-core, dart-async, dart-collection, dart-convert, dart-io

pub.dev (25+ URLs)

Popular packages: provider, bloc, riverpod, dio, hive, firebase_*, etc.

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Related Skills

• fai-skill: Stage 2 (preprocessing) and overall project management