Stop prompting AI coding agents like it's 2024

Your coding agents are capable of so much more—they just need an operating system. Introducing, Agent OS.

The operating system for spec-driven development with AI coding agents.

Agent OS replaces the guesswork of AI coding with structured, spec-driven development workflows. Your coding standards, patterns and best practices become executable specifications that guide your AI agents to build your way, every time.

No more prompting in circles or constantly fixing AI mistakes—just reliable, consistent code that matches how your team actually builds.

Use it with:

Any tool you use: Claude Code, Cursor, Codex, Gemini, Windsurf, or any other.
Multi-agent orchestration or single-agent interfaces
New products or established codebases.
Any language or framework.

Don't miss a release

Get notified of major new releases of Agent OS:

What is Agent OS?

Agent OS is a spec-driven development system that gives AI agents the structured context they need to write production-quality code. It provides your AI with clear specifications, standards, and workflows—transforming inconsistent outputs into reliable, production-ready implementations.

How it works

Agent OS uses a 3-layer context system:

  1. Standards - How you build (your coding standards that train your AI agents)
  2. Product - What you're building and why (vision and roadmap and use-cases)
  3. Specs - What you're building next (specific features with implementation details)

Learn more the 3-Layer Context System

Works with any AI coding tool

Agent OS adapts to your preferred AI coding tool through flexible configuration options:

  • Claude Code - Use Agent OS with Claude Code commands and optionally delegate to subagents for advanced orchestration
  • Other tools (Cursor, Codex, Gemini, Windsurf, etc.) - Use Agent OS commands as sequential prompts in any AI coding tool

Learn more about configuration options

Next steps

Builder Methods

Training & community for pro software developers building with AI.

Created by Brian Casel (that's me). I'm a career software developer, founder, and creator of Builder Methods and Agent OS, the system for spec-driven development with AI.

© 2025 CasJam Media, LLC / Builder Methods
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