Agent skill
agent-creator
Create Claude Code subagents. Use when user wants to create a subagent, specialized agent, or custom AI assistant for Claude Code.
Install this agent skill to your Project
npx add-skill https://github.com/alexjx/skills/tree/main/.claude/skills/agent-creator
SKILL.md
Agent Creator
Creates Claude Code subagents - specialized AI assistants defined as markdown files.
What is a Subagent?
A subagent is a markdown file with YAML frontmatter that defines a specialized AI assistant. Claude Code delegates tasks to subagents based on their description.
File Format
---
name: agent-name
description: When to use this agent. Include trigger words.
tools: Read, Grep, Glob
model: sonnet
---
System prompt goes here. Define the agent's role, process, and output format.
Configuration Fields
| Field | Required | Description |
|---|---|---|
name |
Yes | Lowercase letters and hyphens only |
description |
Yes | When Claude should use this agent |
tools |
No | Comma-separated list. Omit to inherit all tools |
model |
No | haiku, sonnet, opus, or inherit |
Available Tools
Read, Write, Edit, Bash, Glob, Grep, WebFetch, WebSearch, plus any MCP tools.
File Locations
| Location | Scope |
|---|---|
.claude/agents/ |
Current project only |
~/.claude/agents/ |
All projects for this user |
Creating a Subagent
-
Ask user for:
- Agent name
- Purpose and when to trigger
- Required tools (minimal set)
- Model choice
-
Create the markdown file with:
- Clear, specific description with trigger words
- Focused system prompt
- Minimal tool permissions
-
Save to the location user specifies
Best Practices
- Focused purpose: One clear responsibility per agent
- Specific triggers: Include action words in description ("Use when...", "Proactively...")
- Minimal tools: Only grant necessary tools
- Clear output format: Define expected response structure in prompt
Example: Code Reviewer
---
name: code-reviewer
description: Reviews code for quality and security. Use after code changes.
tools: Read, Grep, Glob, Bash
model: sonnet
---
You are a code reviewer. When invoked:
1. Run git diff to see changes
2. Review for quality, security, maintainability
3. Provide feedback by priority: Critical > Warnings > Suggestions
Recommended Agent Skills
Expand your agent's capabilities with these related and highly-rated skills.
alexjx/skills
skill-creator
Create new Claude Code skills in this repository. Use when user wants to add a new skill, create a skill, implement a skill, or extend Claude's capabilities with a custom workflow.
alexjx/skills
commit
Guide for creating atomic commits with conventional commit format. Use when user wants to commit changes.
alexjx/skills
crawl4ai
Web crawler that converts URLs to clean markdown. Use when user wants to fetch a webpage, extract web content, convert URL to markdown, or scrape website content.
alexjx/skills
agent-harness
Framework for orchestrating multiple AI agent sessions to complete complex, long-running software projects. Use when the user wants to set up or use the long-running agent harness pattern for managing multi-session projects, breaking work into discrete sessions with persistent state tracking, or implementing incremental progress workflows across multiple Claude Code sessions.
mattpocock/skills
edit-article
Edit and improve articles by restructuring sections, improving clarity, and tightening prose. Use when user wants to edit, revise, or improve an article draft.
mattpocock/skills
handoff
Compact the current conversation into a handoff document for another agent to pick up.
Didn't find tool you were looking for?