Postern
The open execution and entitlement protocol for packaged AI agents.
You bought or downloaded an agent. It is a folder on your machine. Now what? Today the answer is different for every agent, so every client that wants to offer something nicer than a terminal has to hard-code that knowledge per agent — which means nobody does it. Postern fixes the interface, not the agent: four HTTP verbs an agent serves, and a licensing check the packaging standards leave as metadata only.