Run your first contract

What this is

Contract authoring is expressing intent by composing requirements. Reusable contracts provide the building blocks; composition determines how their requirements apply together.

An agent performs the work, and an evaluator assesses whether the contract’s requirements are satisfied. The executor returns a result that includes the evidence needed for that assessment. Execution and evaluation repeat as needed.

This public repository supplies the Contract Markdown and ProseScript format, the open-prose skill, and reusable libraries. A responsibility expresses requirements for state maintained over time. A function performs a one-time call. ProseScript specifies required steps when their order or method matters. See requirements and composition for how these fit together.

Contracts are readable *.prose.md files. A compatible agent harness runs them using the skill and its own tools. The requirements remain the reference for success; execution depends on the host's inputs, capabilities, and permissions. Serving a standing responsibility requires a host that supports continuous operation. See Harnesses and Honest status.