What It Actually Takes to Build a Software Factory — Tereza Tížková, Factory

Everyone is talking about software factories, but few people are building one.

Tereza Tížková of Factory, which runs software factories for enterprises like EY and Adobe, defines one as the whole software lifecycle run autonomously: collecting signals, prioritizing, building, validating and improving. It's not just a swarm of coding agents, because writing code is the easy part. She lays out three principles. Stay agnostic: fit how your team already works, and route between models automatically (Factory's conservative benchmark shows about 25% savings). Stay autonomous: Factory's Missions run for hours or even weeks, with a real customer example running 16. Worker agents run in sequence instead of a swarm, so each starts with fresh context, and validators check code they didn't write. One of those validators actually clicks through the app. Keep improving: a deferred context engine cuts token use by 50% or more, and an agent-readiness check keeps AI from making a messy codebase worse. She closes on what's left for humans: deciding what to build, not how.

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