Table of Contents Introduction Use Cases Step-by-Step: Create Agent with TypeSpec Limitations & Gotchas Troubleshooting Build Errors main.tsp Solution for OpenAI Action.tsp Example Output: Generated Files Testing Tips for Success Declarative Agent - Volunteering App: MS Graph Auth Challenge Conclusion References Introduction Building declarative agents using the M365 Agents Toolkit and TypeSpec streamlines the process of generating JSON and YAML specifications. This is a great improvement to manually updating and generating JSON and YAML yourself which is not the best experience.