✨ Agent Builder
Create custom agents for Claude Code including YAML frontmatter, system prompts, tool restrictions, and discovery optimization. Use when creating, building, or designing agents, or when asked about agent creation, subagent configuration, Task tool delegation, or agent best practices.
npx playbooks add skill mike-coulbourn/claude-vibes --skill agent-builder
About Agent Builder
The Agent Builder skill enables developers to create custom agents for Claude Code, allowing them to define specifics such as YAML frontmatter, system prompts, and tool restrictions. This skill connects to the broader capabilities of Claude Code, facilitating the design and configuration of agents and subagents. Developers would use the Agent Builder when creating or designing new agents, or when configuring task tool delegation and seeking best practices for agent development.
The 38-word prompt provides structured prompt engineering guidance — covering detailed methodology and consistent output formats. Install it in one command.
Use Cases
- Crafting effective CLAUDE.md and .cursorrules files
- Designing system prompts for specialized AI agents
- Optimizing prompts for consistency and reliability
- Building skill and plugin definitions
Example Prompts
System Prompt (38 words)
Create custom agents for Claude Code including YAML frontmatter, system prompts, tool restrictions, and discovery optimization. Use when creating, building, or designing agents, or when asked about agent creation, subagent configuration, Task tool delegation, or agent best practices.
Frequently Asked Questions
What is Agent Builder?
Agent Builder is a free prompt engineering skill for AI coding agents. Create custom agents for Claude Code including YAML frontmatter, system prompts, tool restrictions, and discovery optimization. Use when creating, building, or designing agents, or when asked about agent creation, subagent configuration, Task tool delegation, or agent best practices.. It provides a specialized system prompt that configures your agent with prompt engineering expertise.
How do I use Agent Builder with Claude Code?
Run npx playbooks add skill mike-coulbourn/claude-vibes --skill agent-builder in your terminal to install Agent Builder into your Claude Code session. It works immediately after installation.
Which AI coding agents work with Agent Builder?
Agent Builder is compatible with Claude Code, Cursor, GitHub Copilot, Windsurf, OpenClaw, Cline, and any AI agent that supports custom system prompts or .cursorrules files.
Is Agent Builder free to use?
Yes, Agent Builder is completely free and open source. The full source is available on GitHub at https://github.com/mike-coulbourn/claude-vibes/tree/main/plugins/vibes/skills/agent-builder. You only need a subscription to the AI agent you use it with.
