Building a Software Factory that actually works (Full Course)

By Greg Isenberg

Categories: Startup, Product

Summary

Software factories use AI agents to systematize development workflows, enabling founders to ship multiple revenue-generating apps faster without sacrificing quality. The key isn't the model—it's optimizing each step of your development process through structured prompts and git workflows that allow parallel agent work.

Key Takeaways

  1. Use an agents.mmd file (markdown injected into every agent chat) to dictate agent behavior and workflow—not to describe existing code the agent already knows. This prevents useless prompts and standardizes your development process.
  2. The 'isolate' step creates a fresh git worktree branched from origin/main for each feature, allowing multiple AI agents to work in parallel without conflicts. Never build directly on main.
  3. Software factories are model and harness agnostic—success depends on workflow, skills, and domain knowledge packed into specific development skills, not which AI tool you use (Claude, GPT-4, etc).
  4. Rather than iteratively typing prompts back-and-forth with AI, structure your development process to maximize model capability at each step while maintaining speed and quality—like an assembly line for software.
  5. Your software factory should be 5-6 files (starting with agents.mmd) that document your specific workflow, making it repeatable and scalable across multiple projects without blindly copying someone else's system.

Related topics

Transcript Excerpt

What are software factories and why is it going viral? I mean, it's basically this concept that allows you to use AI agents to actually ship software that isn't sloppy at all that is more like a factory, more like think about an assembly line and you're just instead of building physical products, you're building software. And that's kind of the dream. I mean, if you're able to just create this factory that builds software and it's valuable software and you can create multiple apps that generate revenue and add value to people's lives. That sounds pretty good to me. So, in today's episode, I brought on Ross Mike and he clearly explains the entire process. [music] By the end of this episode, you're going to understand how to set your own software factory up yourself. [music] So, enjoy the ep…

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