Use web search tool to find authoritative documentation:
Search queries to try:
official documentation
getting started guide
API reference
GitHub repository
Source prioritization:
Official docs sites (e.g., docs., .dev)
Official GitHub repositories (README, /docs)
Official blogs/announcements
Select
3–5 high-quality URLs
maximum.
If no credible sources found, ask user to provide a URL.
3. Extract Content (URL Reading)
For each selected URL, read the content:
Extract only relevant sections:
Installation / setup
Core concepts
API reference / key functions
Common patterns / examples
Version information
Skip irrelevant content:
Navigation, ads, login prompts
Unrelated sidebar content
Comments, forums
If reading the content fails (JavaScript-heavy sites), fall back to browser agent:
Task: Navigate to and extract the main content including:
- Installation instructions
- Core concepts and API reference
- Code examples
Return the extracted content as markdown.
Record scrape timestamp for each source (use current date: YYYY-MM-DD format).
4. Generate Skill
Skills are modular, self-contained packages. Every skill consists of a required
SKILL.md
file and optional bundled resources:
skill-name/
├── SKILL.md (required)
│ ├── YAML frontmatter metadata (required)
│ │ ├── name: (required)
│ │ └── description: (required)
│ └── Markdown instructions (required)
└── Bundled Resources (optional)
├── scripts/ - Executable code (Python/Bash/etc.)
├── references/ - Documentation intended to be loaded into context as needed
└── assets/ - Files used in output (templates, icons, fonts, etc.)
Read
references/skill_creation_guide.md
to understand the format and principles.
Synthesize the learned and extracted information into a new skill.
Trigger:
Write a description that clearly defines when to use it.
Workflow:
Create step-by-step instructions.
Format:
Ensure valid YAML frontmatter and proper file structure.
5. Save the Skill
Antigravity supports two types of skills, save a global-workspace if asked.
.agent/skills//
Workspace-specific
~/.gemini/antigravity/skills//
Global (all workspaces)
Create directory if it doesn't exist, warn user before overwriting existing skill.
6. Confirm to User
Report:
✓ Created skill:
Sources scraped:
Saved to: .agent/skills//SKILL.md
This skill will auto-trigger when working with .
Tool Reference
search_web
Discover documentation URLs
read_url_content
Extract content from static pages
browser_subagent
Extract content from JavaScript-heavy sites
write_to_file
Save the generated skill
Critical Rules
Never hallucinate documentation:
Only include information from scraped sources.
Never invent APIs:
If documentation is unclear, ask the user what to do.
Ask for URLs:
If automated discovery fails, ask user for specific URLs.
Verify sources:
Prefer official sources over third-party tutorials.