Agent OS v3: Leaner & Smarter for Building in 2026

Agent OS v3 is here — rebuilt from the ground up for how we actually build in 2026.

I stripped out 70% of the framework. What's left: a leaner system for discovering, documenting, and injecting your coding standards into AI-powered, spec-driven development.

In this video, I'll show you:

The new 'discover-standards' command for surfacing your opinionated patterns and documenting standards.
The new smart injection system for using your standards... anywhere, anytime.
The new way to write better, more aligned specs—without changing how you build with Claude Code or Cursor.
Using profiles for managing different standards across project types

👇 *Your Builder Briefing (free)*
https://buildermethods.com - Your free, 5-minute read to keep up with the latest tools & workflows for building with AI.

👇 *Use Agent OS* (free open source):
https://buildermethods.com/agent-os

👇 *Use Design OS* (free open source):
https://buildermethods.com/design-os

👇 *Join Builder Methods Pro*
https://buildermethods.com/pro - The membership for professionals (and soon-to-be-pros) for building with AI. Private discord. Video training library. Official support for Agent OS.

▶️ Related videos:
Claude Code is all you need in 2026    • Claude Code is all you need in 2026  
Design OS: The AI-first design process    • Design OS: The Missing Design Process for ...  

💬 Drop a comment with your questions and requests for upcoming videos!

Chapters:

0:00 Legacy codebases & AI
1:28 Spec-driven development
2:17 Agent OS v3: What's new?
6:19 Discover Standards
10:38 Claude Skill vs. Agent OS Standard
11:25 Injecting Standards (anywhere)
12:10 Creating a Skill with Standards
14:41 Shaping a Spec with Agent OS & Plan Mode
20:06 Injecting standards (anywhere)
22:41 Who is Agent OS for?
23:29 Design OS for new products