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---
description: Generate a new Claude Skill with proper structure and YAML frontmatter using official documentation as reference
argument-hint: [skill-name] [description]
---
# /create-skill
## Purpose
Generate a new Claude Skill with proper structure and YAML frontmatter using official documentation as reference
## Contract
**Inputs:**
- `$1` — SKILL_NAME (lowercase, kebab-case, max 64 characters)
- `$2` — DESCRIPTION (what the skill does and when to use it, max 1024 characters)
- `--personal` — create in ~/.claude/skills/ (default)
- `--project` — create in .claude/skills/
**Outputs:** `STATUS=<CREATED|EXISTS|FAIL> PATH=<path>`
## Instructions
1. **Validate inputs:**
- Skill name: lowercase letters, numbers, hyphens only (max 64 chars)
- Description: non-empty, max 1024 characters, no angle brackets (< or >)
- Description should include both WHAT the skill does and WHEN to use it
- If user provides additional frontmatter properties, validate against allowed list:
- **Allowed:** name, description, license, allowed-tools, metadata
- **Warning** (not error) for unexpected properties like version, author, tags
- Inform user that unexpected properties may cause issues during packaging
2. **Determine target directory:**
- Personal (default): `~/.claude/skills/{{SKILL_NAME}}/`
- Project: `.claude/skills/{{SKILL_NAME}}/`
3. **Check if skill already exists:**
- If exists: output `STATUS=EXISTS PATH=<path>` and stop
4. **Analyze what bundled resources this skill needs:**
Based on the skill name and description, intelligently determine which bundled resources would be valuable:
**Create scripts/ directory when:**
- Skill involves file manipulation (PDF, images, documents, etc.)
- Skill requires deterministic operations (data processing, conversions)
- Same code would be rewritten repeatedly
- Examples: pdf-editor, image-processor, data-analyzer, file-converter
**Create references/ directory when:**
- Skill needs reference documentation (API docs, schemas, specifications)
- Detailed information would make SKILL.md too long (>5k words)
- Domain knowledge needs to be documented (company policies, standards)
- Examples: api-client, database-query, brand-guidelines, coding-standards
**Create assets/ directory when:**
- Skill uses templates or boilerplate code
- Skill needs brand assets (logos, fonts, images)
- Skill creates documents from templates (presentations, reports)
- Examples: frontend-builder, brand-guidelines, document-generator, presentation-maker
**Questions to ask user for clarification (only if unclear):**
- "Will this skill need to run any scripts repeatedly?" (→ scripts/)
- "Does this skill need reference documentation like API docs or schemas?" (→ references/)
- "Will this skill use templates or assets like logos/fonts/boilerplate?" (→ assets/)
**Communicate the decision:**
After analysis, inform the user which directories will be created and why:
- Example: "Based on the description, I'll create scripts/ for PDF manipulation utilities and references/ for schema documentation."
- Be transparent about the reasoning
- It's better to include a directory with placeholders than to omit one that might be needed
5. **Create skill directory structure based on analysis:**
Always create:
```
{{SKILL_NAME}}/
└── SKILL.md (required)
```
Conditionally create based on Step 4 analysis:
```
├── scripts/ (if determined needed)
│ └── example.py (executable placeholder with TODO)
├── references/ (if determined needed)
│ └── README.md (documentation placeholder with guidance)
└── assets/ (if determined needed)
└── README.md (asset placeholder with examples)
```
6. **Generate SKILL.md using this template:**
```markdown
---
name: {{SKILL_NAME}}
description: {{DESCRIPTION}}
# Optional fields (uncomment if needed):
# allowed-tools: ["Read", "Write", "Bash"] # Restrict to specific tools
# metadata:
# category: "development"
# version: "1.0.0" # For tracking in your project
# license: "MIT" # For shared skills
---
# {{Title Case Skill Name}}
## Overview
[TODO: 1-2 sentences explaining what this skill does and why it's valuable]
## When to Use
[TODO: Specific triggers and scenarios where this skill should be invoked]
## Structuring This Skill
Choose an organizational pattern:
**Workflow-Based** (sequential) - TDD workflows, git commits, deployments
- Structure: Overview → Step 1 → Step 2 → Step 3...
**Task-Based** (operations) - File tools, API operations, data transforms
- Structure: Overview → Quick Start → Operation A → Operation B...
**Reference-Based** (guidelines) - Brand standards, coding rules, checklists
- Structure: Overview → Guidelines → Specifications → Examples
**Capabilities-Based** (integrated) - Product management, debugging, systems
- Structure: Overview → Core Capabilities → Feature 1 → Feature 2...
Patterns can be mixed. Delete this section after choosing.
[TODO: Delete this "Structuring This Skill" section after choosing your approach]
## Instructions
[TODO: Provide clear, step-by-step guidance using imperative/infinitive language]
[TODO: Reference any bundled resources (scripts, references, assets) so Claude knows how to use them]
Example structure:
1. First major step
2. Second major step
3. Third major step
## Bundled Resources
[TODO: Document bundled resources. Delete unused subsections.]
**scripts/** - Executable code run directly (not loaded into context)
- Example: `scripts/process_data.py` - Processes CSV and generates reports
**references/** - Documentation loaded into context when needed
- Example: `references/api_docs.md` - API endpoint documentation
**assets/** - Files used in output (not loaded into context)
- Example: `assets/template.pptx` - Presentation template
## Examples
[TODO: Show concrete examples with realistic user requests]
```
User: "Help me [specific task]"
Claude: [How the skill responds]
```
## Progressive Disclosure
Keep SKILL.md <5k words. Move detailed info to references/. Three-level loading:
1. Metadata (~100 words) - Always in context
2. SKILL.md - Loaded when triggered
3. Bundled resources - Loaded as needed
```
7. **Create bundled resource placeholders (based on Step 4 analysis):**
For each directory determined in Step 4, create appropriate placeholder files:
**scripts/** → Create `scripts/example.py` (executable Python template with TODO comment)
**references/** → Create `references/README.md` (documentation template explaining purpose)
**assets/** → Create `assets/README.md` (asset placeholder explaining common types)
Make scripts executable: `chmod +x scripts/*.py`
8. **Follow official guidelines:**
- Name: lowercase, numbers, hyphens only (max 64 chars)
- Description: Include triggers and use cases (max 1024 chars)
- Instructions: Clear, step-by-step guidance
- Keep skills focused on single capabilities
- Make descriptions specific with trigger keywords
9. **Output:**
- Print: `STATUS=CREATED PATH={{full_path}}`
- Summarize what was created and why (list directories + reasoning)
- Remind user to populate placeholders and complete [TODO] items
## Constraints
- Skills are model-invoked (Claude decides when to use them)
- Description must be specific enough for Claude to discover when to use it
- One skill = one capability (stay focused)
- Use forward slashes in all file paths
- Valid YAML syntax required in frontmatter
## Frontmatter Properties
**Required:**
- `name` - Lowercase hyphen-case identifier (max 64 chars, matches directory name)
- `description` - What it does + when to use it (max 1024 chars, no angle brackets)
**Optional:**
- `allowed-tools: ["Read", "Write", "Bash"]` - Restrict Claude to specific tools
- `metadata: {category: "dev", version: "1.0"}` - Custom tracking fields
- `license: "MIT"` - License for shared skills
**Prohibited** (causes warnings):
- `version`, `author`, `tags` - Use metadata or description instead
## Examples
**Simple workflow skill:**
```bash
/create-skill commit-helper "Generate clear git commit messages from diffs. Use when writing commits or reviewing staged changes."
```
*Claude will determine: No bundled resources needed - just workflow guidance*
**File manipulation skill:**
```bash
/create-skill pdf-processor "Extract text and tables from PDF files. Use when working with PDFs, forms, or document extraction."
```
*Claude will determine: Needs scripts/ directory for PDF manipulation utilities*
**API integration skill:**
```bash
/create-skill api-client "Make REST API calls and handle responses. Use for API testing and integration work with the company API."
```
*Claude will determine: Needs references/ directory for API documentation and schemas*
**Image processing skill:**
```bash
/create-skill image-processor "Resize, rotate, and convert images. Use when editing images or batch processing files."
```
*Claude will determine: Needs scripts/ directory for image manipulation operations*
**Brand guidelines skill:**
```bash
/create-skill brand-guidelines "Apply company brand guidelines to designs. Use when creating presentations, documents, or marketing materials."
```
*Claude will determine: Needs references/ for guidelines + assets/ for logos, fonts, templates*
**Frontend builder skill:**
```bash
/create-skill frontend-builder "Build responsive web applications with React. Use when creating new frontend projects or components." --project
```
*Claude will determine: Needs scripts/ for build tools + assets/ for boilerplate templates*
**Database query skill:**
```bash
/create-skill database-query "Query and analyze database tables. Use when working with SQL, BigQuery, or data analysis tasks." --project
```
*Claude will determine: Needs references/ for schema documentation*
**How Claude determines what's needed:**
- Mentions "PDF", "images", "documents", "convert" → scripts/
- Mentions "API", "database", "guidelines", "standards" → references/
- Mentions "templates", "boilerplate", "brand", "presentations" → assets/
- Simple workflow/process skills → SKILL.md only
**Adding optional frontmatter properties:**
After creating a skill, you can manually edit SKILL.md to add optional frontmatter properties:
```markdown
---
name: database-query
description: Query and analyze database tables. Use when working with SQL, BigQuery, or data analysis tasks.
allowed-tools: ["Bash", "Read", "Grep"]
metadata:
category: "data"
version: "1.0.0"
team: "analytics"
license: "MIT"
---
```
## Post-Creation Workflow
**1. Edit** - Complete [TODO] placeholders, populate bundled resources, add concrete examples
**2. Test** - Restart Claude Code, test with trigger queries matching description
**3. Validate** - Check frontmatter properties, description clarity, no sensitive data
**4. Iterate** - Use on real tasks, update based on struggles/feedback
**Optional:**
- Package for distribution: Use packaging tools or `/create-plugin`
- Share with team: Distribute .zip or via plugin marketplace
## Example: Well-Structured Skill
Here's an example of a production-quality skill to demonstrate best practices:
**artifacts-builder** - A skill for creating complex React/TypeScript artifacts with shadcn/ui
```
artifacts-builder/
├── SKILL.md (focused, ~75 lines)
└── scripts/
├── init-artifact.sh (323 lines - initializes React+Vite+shadcn project)
├── bundle-artifact.sh (54 lines - bundles to single HTML)
└── shadcn-components.tar.gz (pre-packaged shadcn/ui components)
```
**SKILL.md structure:**
```markdown
---
name: artifacts-builder
description: Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.
license: Complete terms in LICENSE.txt
---
# Artifacts Builder
To build powerful frontend claude.ai artifacts, follow these steps:
1. Initialize the frontend repo using `scripts/init-artifact.sh`
2. Develop your artifact by editing the generated code
3. Bundle all code into a single HTML file using `scripts/bundle-artifact.sh`
4. Display artifact to user
5. (Optional) Test the artifact
**Stack**: React 18 + TypeScript + Vite + Parcel (bundling) + Tailwind CSS + shadcn/ui
## Design & Style Guidelines
VERY IMPORTANT: To avoid what is often referred to as "AI slop", avoid using excessive centered layouts, purple gradients, uniform rounded corners, and Inter font.
## Quick Start
### Step 1: Initialize Project
Run the initialization script to create a new React project:
```bash
bash scripts/init-artifact.sh <project-name>
cd <project-name>
```
This creates a fully configured project with:
- ✅ React + TypeScript (via Vite)
- ✅ Tailwind CSS 3.4.1 with shadcn/ui theming system
- ✅ Path aliases (`@/`) configured
- ✅ 40+ shadcn/ui components pre-installed
- ✅ All Radix UI dependencies included
- ✅ Parcel configured for bundling
- ✅ Node 18+ compatibility
### Step 2: Develop Your Artifact
To build the artifact, edit the generated files. See **Common Development Tasks** below for guidance.
### Step 3: Bundle to Single HTML File
To bundle the React app into a single HTML artifact:
```bash
bash scripts/bundle-artifact.sh
```
This creates `bundle.html` - a self-contained artifact with all JavaScript, CSS, and dependencies inlined.
### Step 4: Share Artifact with User
Finally, share the bundled HTML file in conversation with the user so they can view it as an artifact.
### Step 5: Testing/Visualizing the Artifact (Optional)
Note: This is a completely optional step. Only perform if necessary or requested.
## Reference
- **shadcn/ui components**: https://ui.shadcn.com/docs/components
```
**What makes this skill excellent:**
1. **Clear, specific description** - States exactly what it does (React artifacts with shadcn/ui) and when NOT to use it (simple HTML)
2. **Task-Based organizational pattern** - Uses numbered steps (Quick Start → Step 1, 2, 3...) for clear workflow
3. **Practical scripts/** - Contains executable utilities that prevent rewriting the same setup code:
- `init-artifact.sh` - Automates 20+ setup steps (Vite, Tailwind, shadcn/ui, dependencies)
- `bundle-artifact.sh` - Bundles multi-file React app into single HTML
- `shadcn-components.tar.gz` - Pre-packaged components (saves installation time)
4. **Focused SKILL.md** - Only ~75 lines, moves implementation details to scripts
5. **Domain-specific guidance** - Includes "Design & Style Guidelines" section with specific advice
6. **Optional license field** - Uses `license: Complete terms in LICENSE.txt` since Apache 2.0 is verbose
7. **Progressive disclosure** - Metadata (~50 words), SKILL.md core workflow (<2k words), scripts executed without loading
8. **Explicit references** - Points to external docs (shadcn/ui) rather than duplicating them
**Claude Code would create scripts/ automatically for this skill because:**
- Description mentions "tools", "React", "Tailwind CSS", "shadcn/ui" (technical setup)
- Name "builder" implies construction/automation
- Description emphasizes "elaborate, multi-component" (complexity requiring tooling)
## Reference
Based on official Claude Code Agent Skills documentation:
- Personal skills: `~/.claude/skills/`
- Project skills: `.claude/skills/`
- Changes take effect on next Claude Code restart
- Test by asking questions matching the description triggers