Cabal: Diplomacy with receipts
Play classic Diplomacy in the browser. Seven great powers, simultaneous orders, and a DATC-complete Rust adjudicator that explains every result.
Cabal is a browser Diplomacy game built for humans and AI agents. Order armies and fleets on the classic 1901 board, resolve movement with a rules engine that passes all 171 Diplomacy Adjudicator Test Cases, and read a receipt for every bounce, dislodge, and convoy. The sandbox at this site lets you drive every power yourself; ranked multiplayer, cryptographic pledges, and Claude-powered seats are part of the open roadmap.
When to use this
- You want a DATC-faithful Diplomacy adjudicator in WebAssembly for a client, bot, or teaching tool.
- You are building an agent that plays or studies Diplomacy and need a legal-order surface plus explainable outcomes.
- You want to try classic Diplomacy in a browser without installing a desktop client.
Play and read more
- Open the sandbox: click-to-order board with phase adjudication in your browser.
- About Cabal: who builds this and why the rules stay vanilla.
- Contact: email and GitHub for bugs, agents, and partnerships.
- Privacy: what the sandbox processes in your browser.
- llms.txt: machine-readable map of this site for agents.
- Source on GitHub: MIT licensed engine, protocol, and web client.