Building a Software Factory that actually works (Full Course)

Greg Isenberg · · 32 min

Ras Mic joins Greg Isenberg to explain how to build a software factory, a structured workflow using AI agents and markdown files to ship code at scale without conflicts or quality drops.

Watch the episode 32 min · YouTube

The gist

  1. Run each new feature in its own git branch so multiple agents can build simultaneously without overwriting each other's work.
  2. Use a code review agent that gives confidence scores on pull requests and sends agents back to fix work that scores below your threshold.

What they recommend · 3 picks

Git worktrees Productivity

"Every new feature starts in a fresh git worktree branched from origin main so agents can work in parallel without conflicts. Never build on main. A worktree is basically a copy ..."

Greptile AI tools

"There's this skill called GP loop which uses a third-party service named Greptile, which is a code review agent. If you're really serious about building software and it's going ..."

Ras Mic ·2 creators recommend it·Ras's AI tools →
Cursor AI tools

"You probably went on Codex, Claude Code, Cursor, whatever it is, and you just typed... This is me using Cursor cloud agents — it says 'proof of improvement' and this is a video ..."

Ras Mic ·58 creators recommend it·Ras's AI tools →

Greg, Ras, This Week in Startups and Riley agree on 35 things

See what they all use, in their own words. Paid ads are left out.

See what they all swear by Or pick your own people

Also mentioned

2:48 Claude Code · "You probably went on Codex, Claude Code, Cursor, whatever it is, and you just typed."
2:48 Codex · "You probably went on Codex, Claude Code, Cursor, whatever it is, and you just typed."
3:51 ChatGPT · "We have amazing models like GPT-6 Astra. GPT-6 Astra is the reason why it's a big leap in model capability..."
12:31 Service layer architecture · "The code structure skill writes code in what's called a service layer architecture. It's written in a way..."
15:30 Evidence-driven testing · "Evidence-driven testing: if your machine has the capability, it will literally record the before state —..."
22:45 Code Rabbit · "Greptile is my favorite. CodeRabbit, Macroscope — there's tons of good ones out there."

Ads in this episode

Brex. They're paid, so we keep them out of the picks above.

See what Greg recommends without being paid →

What do Greg and experts like them all swear by?

35 things in common

See