OrdoThe deterministic decision layer for AI agents

The LLM proposes, your rules dispose. A sub-microsecond, JIT-compiled rule engine in Rust — with guardrails for your AI agent you can actually test.

Guard your agent

Get Started

Engine Docs

GitHub

Agent Guardrails

Gate every Claude Code tool call through a local rule that decides allow / deny / ask — deterministically. The policy is a normal Ordo project, so your guardrails have a test suite and an audit log. Install in 5 minutes with npx.

Guard your agent

Decision Platform

Organizations, projects, members & RBAC, fact catalog, concept registry, typed contracts, approval & release pipelines, multi-environment rollouts and rollback — built for team-scale decision governance.

Platform overview

Studio Editor

Three authoring modes (flow / form / JSON), decision tables, sub-rules, template instantiation, test suite management, and execution trace panels.

Studio guide

Releases & Environments

Draft → review → release → canary → rollback. Configurable approval policies, change diffs, per-environment delivery, every action recorded in the audit log.

Release pipeline

High-Performance Engine

Sub-microsecond rule execution. Bytecode VM plus Cranelift JIT, expression optimizer. Reach it over HTTP, gRPC, Unix Socket, or WASM.

Execution model

Types & Contracts

Project-scoped fact catalog, reusable concepts, typed input/output contracts. Studio and CLI consume the same contract definitions.

Facts & contracts

Multi-Region Deployment

Central platform governance plus regional engine clusters. Server registry, health checks, per-project execution proxy. Single-binary or containerized deployment.

Server registry

Architecture

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The documentation is organized into two tracks:

Platform — for teams using Ordo Platform / Studio to govern decisions: organization modeling, contracts, release flow, test management.
Engine — for developers integrating ordo-core / ordo-server directly: rule structure, expression syntax, HTTP / gRPC / WASM APIs.

Quick Example

json

{
  "config": {
    "name": "discount-check",
    "version": "1.0.0",
    "entry_step": "check_vip"
  },
  "steps": {
    "check_vip": {
      "id": "check_vip",
      "name": "Check VIP Status",
      "type": "decision",
      "branches": [{ "condition": "user.vip == true", "next_step": "vip_discount" }],
      "default_next": "normal_discount"
    },
    "vip_discount": {
      "id": "vip_discount",
      "type": "terminal",
      "result": { "code": "VIP", "message": "20% discount" }
    },
    "normal_discount": {
      "id": "normal_discount",
      "type": "terminal",
      "result": { "code": "NORMAL", "message": "5% discount" }
    }
  }
}