About Phrony

Phrony is a methodology for building AI agents and an open-source runtime that implements it. The idea is simple: agents deserve the same treatment as other long-lived infrastructure — declared, deployed, and run as first-class entities rather than buried in application code.

The open specification defines the manifest schema, policy model, runtime contract, and trace format. The reference runtime on GitHub loads deployed manifests, executes agent sessions, mediates tool calls, and produces structured traces. Anyone can run it, inspect it, or build conformant tooling on top of the spec.