Every powerful system begins the same way: with rules. Rules as a language, a protocol, a way for parts to fit together into something greater. The history of software is really a history of this idea: from UNIX pipes to API contracts to typed programming languages, composability has always been the path to scale.

But large language models broke that pattern. They’re powerful, but unpredictable. Flexible, but fragile. And without contracts, their outputs don’t compose, they just accumulate noise. Despite their tremendous capabilities, AI systems built on LLMs remain unrealized potential.

That’s why we built .txt: to make AI composable.

We believe that safety and reliability are the foundation. That contracts are what let systems scale. That AI should behave like software.
So we build reliability at every layer of the stack: from the tokens a model emits, to the agents that act on them.

AI is the new software. We make sure it acts like it.