Builder Methods
buildermethods.com
Training, workshops and community for developers building software with AI.
Agent OS by Brian Casel
Free open-source system for spec-driven development with AI coding agents.
Visit Agent OS ↗About Agent OS
Free open-source system for spec-driven development with AI coding agents. Agent OS is a ai builders product built by indie maker Brian Casel, launched in 2025.
- Status
- Active
- Launched
- 2025
- Category
- AI Builders
- Website
- buildermethods.com
More products by Brian Casel
Clarityflow (formerly ZipMessage)
clarityflow.com
Coaching platform built around async video, audio and text conversations.
Productized content marketing and blog writing service.
Ready-made website service for restaurants.
Agent OS FAQ
What is Agent OS?
Agent OS is a ai builders product: Free open-source system for spec-driven development with AI coding agents.
Who made Agent OS?
Agent OS was made by Brian Casel, Serial bootstrapper behind Audience Ops, Clarityflow and Builder Methods. It launched in 2025. Brian Casel has also built Builder Methods, Clarityflow (formerly ZipMessage), Audience Ops, Restaurant Engine.
Is Agent OS still active?
Yes. As far as IndieMakerList knows, Agent OS is still active and run by Brian Casel at buildermethods.com.
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