What is a Codex sub-agent?

A sub-agent is a specialized AI persona configured with a specific system prompt and set of tools to handle defined tasks within the Codex environment.

Can I limit the tools a sub-agent can access?

Yes, you can specify a comma-separated list of tools in the tools field of the configuration to restrict the sub-agent's capabilities to specific actions like read-only or bash access.

Does this skill support different AI models?

Yes, you can configure individual sub-agents to use specific models like Claude 3.5 Sonnet, Opus, or Haiku, or simply set it to inherit the main agent's model.

How does Claude know which sub-agent to use?

Claude uses the description field in the sub-agent's YAML frontmatter to determine when to automatically delegate a task to that specific assistant.

Where are sub-agent files stored?

Sub-agents are stored as Markdown files in either the .codex/agents/ folder for project-specific use or ~/.codex/agents/ for global user access.

Sub-agent Creator

Name: Sub-agent Creator
Author: tygwan

bytygwan

•

Productivity & Workflow

Generates specialized, task-specific AI sub-agents with custom system prompts and tool configurations for the Codex framework.

The Sub-agent Creator skill empowers developers to extend Claude's capabilities by creating dedicated AI assistants tailored for specific project needs, such as code reviewers, debuggers, or security auditors. By utilizing a standardized Markdown format with YAML configuration, it automates the setup of custom system prompts, model selection, and tool access permissions. This skill is essential for building complex, multi-agent workflows within the Codex environment, ensuring that the right AI persona is automatically delegated to the right task based on the context of the user's request.

Key Features

011 GitHub stars

02Standardized Markdown-based sub-agent generation

03Support for project-level and user-level agent scopes

04Custom YAML configuration for tools, models, and permissions

05Automatic delegation logic via optimized description fields

06Template-driven workflow for rapid persona deployment

Use Cases

01Developing a project-specific Documentation Writer that understands local coding standards

02Creating a dedicated Security Auditor sub-agent to scan for vulnerabilities before commits

03Setting up a Debugging Specialist that automatically triggers upon test failures

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add tygwan/ultra-codex-init subagent-creator

For use in Claude.ai and ChatGPT

Download Skill