What is SINT?
SINT Protocol is an open-source safety and governance framework for physical AI — robots, drones, autonomous vehicles, and industrial automation. It implements a Security Wedge architecture: a mandatory policy gateway that sits between AI decision-making models and physical actuators, enforcing capability-scoped permissions, constraint boundaries, and an append-only evidence ledger on every action. Every action an AI agent attempts against the physical world must pass through the SINT Gate — a singleintercept() entry point backed by Ed25519-signed capability tokens, a five-tier safety classification system (T1 Sandbox → T5 Unsupervised), and CSML (Continuous Safety Monitoring Language) anomaly detection. Governance is decentralized through an Open Agent Trust Registry, enabling multi-operator deployments without a single point of credential authority.
Core Products
SINT Protocol
The core open-source monorepo. 24 packages, 5 apps, 3 SDKs. Safety gateway, capability tokens, evidence ledger.
SINT Gate
The policy enforcement engine.
intercept() API, five-tier safety tiers, constraint system, approval queue.Architecture
Full system overview: package map, gateway server, bridge ecosystem, data flow diagrams.
Whitepaper
Formal specification of the Security Wedge model, invariants, threat model, and formal safety proofs.
SINT Console
Unified control center — 31 feature modules, visual workflow builder, real-time agent orchestration, policy management.
Security Model
Ed25519 token cryptography, delegation chains, goal hijack detection, circuit breaker invariants.
Avatar System
3D talking AI avatar with ElevenLabs lipsync, CSML-driven expression escalation, and real-time operator UI.
Roadmap
Development roadmap: npm publish → framework integrations → physical AI partnerships → enterprise.
Key Numbers
| Metric | Value |
|---|---|
| Packages in monorepo | 24 |
| Apps | 5 (gateway-server, sintctl, sint-mcp, sint-mcp-scanner, dashboard) |
| SDKs | 3 (TypeScript, Python, Go) |
| Test suite | 1,363 tests |
| Protocol bridges | 12 (ROS2, gRPC, MCP, MQTT/Sparkplug, OPC-UA, MAVLink, A2A, IoT, OpenRMF, Economy, Swarm, HAL) |
| Safety tiers | 5 (T1 Sandbox → T5 Unsupervised) |
| REST endpoints | 32 across 10 route modules |
| Delegation depth | Max 3 (attenuation-only) |
| Goal hijack patterns | 25+ regex patterns |
| Ledger integrity | SHA-256 hash chain (genesis → append-only) |
| Token crypto | Ed25519 via @noble/ed25519 |
Quick Links
GitHub — sint-ai org
Browse the monorepo, open issues, and contribute.
sint-protocol repo
Main protocol repository.
packages/, apps/, sdks/.Discord
Join the community for protocol discussions and support.
Telegram
Operator channel for announcements and deployment support.
SINT Protocol is open-source under the MIT license. The gateway server, CLI, and Console are production-ready. See the Roadmap for what’s next.