Agent skill
skill-creator
Use PROACTIVELY when creating new Claude Code skills from scratch. Automated generation tool following Claudex marketplace standards with intelligent templates, pattern detection, and quality validation. Supports guided creation, quick start templates, clone-and-modify, and validation-only modes. Not for modifying existing skills or non-skill Claude Code configurations.
Install this agent skill to your Project
npx add-skill https://github.com/cskiro/claudex/tree/main/plugins/skill-creator/skills/skill-creator
SKILL.md
Skill Creator
Automates creation of Claude Code skills through interactive guidance, template generation, and quality validation.
When to Use
Trigger Phrases:
- "create a new skill for [purpose]"
- "generate a skill called [name]"
- "scaffold a [type] skill"
- "set up a new skill"
Use Cases:
- Creating new skills from scratch
- Following Claudex marketplace standards
- Learning skill structure through examples
Quick Decision Matrix
| User Request | Mode | Action |
|---|---|---|
| "create skill for [purpose]" | Guided | Interactive creation |
| "create [type] skill" | Quick Start | Template-based |
| "skill like [existing]" | Clone | Copy pattern |
| "validate skill" | Validate | Quality check |
Mode 1: Guided Creation (Default)
Use when: User wants full guidance and customization
Process:
- Gather basic info (name, description, author)
- Define purpose, category, triggers
- Assess complexity → determine skill type
- Customize directory structure
- Select pattern (mode-based, phase-based, validation, data-processing)
- Generate files from templates
- Run quality validation
- Provide installation and next steps
Workflow: workflow/guided-creation.md
Mode 2: Quick Start
Use when: User specifies skill type directly (minimal, standard, complex)
Process:
- Confirm skill type
- Gather minimal required info
- Generate with standardized defaults
- Flag ALL customization points
Advantages: Fast, minimal questions Trade-off: More TODO sections to customize
Mode 3: Clone & Modify
Use when: User wants to base skill on existing one
Process:
- Read existing skill's structure
- Extract organizational pattern (not content)
- Generate new skill with same structure
- Clear example-specific content
Advantages: Proven structure, familiar patterns
Mode 4: Validation Only
Use when: User wants to check existing skill quality
Process:
- Read existing skill files
- Run quality checklist
- Generate validation report
- Offer to fix issues automatically
Use Case: Before submission, after modifications
Skill Types
| Type | Complexity | Directories | Pattern |
|---|---|---|---|
| Minimal | Low | SKILL.md, README.md only | phase-based |
| Standard | Medium | + data/, examples/ | phase-based or validation |
| Complex (mode) | High | + modes/, templates/ | mode-based |
| Complex (data) | High | + scripts/, data/ | data-processing |
Generated Files
Required (all skills):
SKILL.md- Main skill manifest (with YAML frontmatter)README.md- User documentationCHANGELOG.md- Version history
Optional (based on type):
modes/- Mode-specific workflowsdata/- Reference materialsexamples/- Example outputstemplates/- Reusable templatesscripts/- Automation scripts
Note:
plugin.jsonis NOT required. The marketplace.json is the single source of truth for plugin metadata.
Quality Validation
Validates against data/quality-checklist.md:
- File existence (all required files)
- Syntax (YAML frontmatter, JSON)
- Content completeness
- Security (no secrets)
- Naming conventions (kebab-case)
- Quality grade (A-F)
Success Criteria
- All required files generated (SKILL.md, README.md, CHANGELOG.md)
- Valid YAML frontmatter with
nameanddescription -
namematches directory name (Anthropic spec requirement) - No security issues (no secrets in files)
- Kebab-case naming (lowercase + hyphens only)
- Version 0.1.0 for new skills
- Description includes capabilities AND trigger context
- Quality grade C or better
Reference Materials
Templates
templates/SKILL.md.j2- Main manifest with frontmattertemplates/README.md.j2- User documentationtemplates/CHANGELOG.md.j2- Version history
Patterns
patterns/mode-based.md- Multi-mode skillspatterns/phase-based.md- Sequential workflowspatterns/validation.md- Audit skillspatterns/data-processing.md- Data analysis
Reference Data
data/categories.yaml- Valid categoriesdata/skill-types.yaml- Type definitionsdata/quality-checklist.md- Validation criteria
Examples
examples/minimal-skill/examples/standard-skill/examples/complex-skill/
Quick Commands
# Check existing skills
ls ~/.claude/skills/
# View skill structure
tree ~/.claude/skills/[skill-name]/
# Validate frontmatter syntax
head -20 ~/.claude/skills/[skill-name]/SKILL.md
# Run marketplace validation
python3 scripts/validate-skills.py
Error Handling
| Error | Solution |
|---|---|
| Name exists | Suggest alternatives or confirm overwrite |
| Invalid name | Explain kebab-case, provide corrected suggestion |
| Permission denied | Check ~/.claude/skills/ write access |
| Template fails | Fallback to manual creation with guidance |
Version: 0.1.0 | Author: Connor
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