OpenProse Released: Markdown-Based AI Agent Task Definition

OpenProse is a new language that defines continuous tasks for AI agents using Markdown files (*.prose.md) as contracts. Unlike existing sequence-centric agents, it adopts a declarative approach that prioritizes declaring the states to maintain (Maintains) and verification conditions over execution order.

Core Operating Principles

• State-based execution: Re-runs only when the input or contract fingerprint changes. If the same signal repeats, it is skipped, incurring no model call costs.
• Facet subscription: Subscribes only to specific parts (facets) of the state, preventing unnecessary re-runs caused by unrelated changes.
• ProseScript: Used selectively only when execution order matters, ensuring flexibility.

Installation and Usage

• Install as a skill for Claude Code, Codex CLI, etc., using the npx skills add openprose/prose command.
• Initialize the workspace and write contracts via prose init, prose compose, prose write, etc.
• The current reference executor (Reactor) is in the alpha stage, requiring caution for production environment deployment.

This tool supports file-based version control and is released under the MIT license.