Agent Zero Development Guide

This skill provides comprehensive, accurate guidance for extending and building features for Agent Zero. Use it when you need to:

• Understand the architecture and project layout
• Create new Tools for agent capabilities
• Add Extensions to hook into the framework lifecycle
• Build API Endpoints for the Web UI
• Create Agent Profiles (subordinates) with custom prompts
• Understand and extend the Prompt System
• Create Skills (see the dedicated build-skill skill for the full wizard)
• Work with Projects and workspace configuration

Path convention: Throughout this guide, /a0/ refers to the framework root — this is /a0/ inside Docker, or your local repository root in development. All paths are relative to this root.

[!IMPORTANT] Plugins are the primary way to extend Agent Zero. Most new tools, extensions, and prompts should be packaged as plugins. For all plugin tasks (create, review, manage, debug, contribute), load the a0-plugin-router skill which routes to the appropriate specialist. This guide covers the underlying framework patterns that plugins build upon.

Related skills: a0-plugin-router (plugin tasks) | build-skill (skill creation wizard) | a0-create-plugin | a0-review-plugin | a0-manage-plugin | a0-contribute-plugin | a0-debug-plugin