Phrony
Phrony is the open-source runtime for governing AI agents in production. Define each agent in one file, set the rules it can never break, require a human for risky actions, and keep a full record of everything it does.
Phrony launched on June 10, 2026 with 16 votes, #956 of 22,647 launches that month and more than 95% of that year's launches.
What it does
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.
Phrony is the open-source runtime for governing AI agents in production. Define each agent in one file, set the rules it can never break, require a human for risky actions, and keep a full record of everything it does. Write what your agent can and cannot do as plain policy. Phrony checks every model and tool call against it — so the agent stays inside the lines, every time. Let the agent handle the routine and pause on anything risky. The session waits until a person approves or rejects — no surprises in production. Every session is recorded: each model turn, tool call, policy decision, and approval. When someone asks what the agent did, you have the answer. Every change ships as a locked…from phrony.com
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