Cupcake

Cupcake

Make AI agents follow the rules.

[](https://cupcake.eqtylab.io/) [](LICENSE) [](https://github.com/eqtylab/cupcake/actions/workflows/ci.yml) [](https://github.com/eqtylab/cupcake/actions/runs/19737865145/job/56558251812)

**Policy enforcement** layer for AI agents; yielding better performance and security **without consuming model context**.

• Deterministic rule-following for your agents. Interactive Examples
• Better performance by moving rules out of context and into policy-as-code.
• Trigger alerts and put bad agents in timeout when they repeatedly violate rules.

Cupcake intercepts agent events and evaluates them against **user-defined rules** written in **[Open Policy Agent (OPA)](https://www.openpolicyagent.org/) [Rego](https://www.openpolicyagent.org/docs/policy-language).** Agent actions can be blocked, modified, and auto-corrected by providing the agent helpful feedback. Additional benefits include reactive automation for tasks you dont need to rely on the agent to conduct (like linting after a file edit).

Updates

**`2025-12-10`**: Official open source release. Roadmap will be produced in Q1 2026.

**`2025-04-04`**: We produce the [feature request](https://github.com/anthropics/claude-code/issues/712) for Claude Code Hooks. Runtime alignment requires integration into the agent harnesses, and we pivot away fro