Phrony is where AI agents live, run, and stay under control. An agent starts as a few lines of code. In production, with real tools, budgets, and humans in the loop, it's not a function anymore. It's an entity, and code is the wrong place to keep it. Phrony lets you declare an agent in one YAML manifest, run it on an open runtime, and trace every run. Open spec, open-source, portable.

Hey Product Hunt 👋 I'm Max, co-founder of Phrony. An agent starts as a few lines of code. Works great. Then it gets real tools, a budget, a human who has to approve the risky calls, and six months of small tweaks. One day it breaks in prod and you're staring at a half-finished run with no idea which step failed, why, or when the behavior changed. That's the moment it stopped being code. It became an entity, and code is the wrong place to keep an entity. So we built Phrony. You declare an agent in one YAML manifest, run it on the runtime, and trace every single run. The runtime owns the loop, the tool calls, the rules, and the full record of what happened. Swap models without rewriting anything. Provider-agnostic, like Terraform. Spec is open, runtime is open-source. Read every line, run it yourself, no lock-in. docker compose up and your first agent is going in a few minutes. What are you building agents for right now? Genuinely want to know.

Phrony

The open runtime for production AI agents

The open runtime for production AI agents

Phrony

Previous Phrony Launches

Previous Phrony Launches