The HQTUI reference dashboard: a btop-grade terminal system monitor. Runs on real system metrics or a deterministic simulation.

Deterministic simulation contracts for AgentPlat Mesh peer state machines.

High-fidelity MongoDB proxy for deterministic simulation testing.

Open-source Three.js game engine for TypeScript with Rapier physics, deterministic simulation, headless testing, and MCP tooling for AI agents.

3-dimensional physics engine in Rust - official JS bindings. Compatibility package with inlined webassembly as base64.

A deterministic simulation testing (DST) framework for TypeScript. It provides controlled scheduling of concurrent tasks, reproducible entropy, and concurrency primitives — all designed so that bugs found during simulation can be replayed exactly.

The moirae engine: deterministic simulation testing for distributed systems. Clock, event queue, PRNG, network faults, invariants, JSONL trace. Zero dependencies.

Class-based hierarchical state machines and run-to-completion actors for TypeScript, designed for Deterministic Simulation Testing (DST) — Config, generated handles, promise services, zero dependencies

2-dimensional physics engine in Rust - official JS bindings. Compatibility package with inlined webassembly as base64.

Deterministic simulation engine implementation.

Deterministic simulation testing for distributed systems, with a visual trace replay. `moirae demo` runs a 5-node Raft cluster through a partition and shows you the failure.

Lightweight HTTP interceptor for deterministic simulation testing. Patches `http.request`/`https.request`, records calls, serves static mocks, and integrates with `@crashlab/clock` for virtual latency.

Deterministic simulation kernel for Effect: a controlled scheduler, in-process wakeups, escape and deadlock detection, interruption at a chosen step, and replay from a decision path.

Synthetic grid-scale battery plant emulator: deterministic simulation kernel and 3D site view in one WASM module

2-dimensional physics engine in Rust - official JS bindings. Compatibility package with inlined webassembly as base64.

Deterministic simulation testing for Node. Finds bugs that only happen under unlucky timing, then replays them exactly.

3-dimensional physics engine in Rust - official JS bindings.

2-dimensional physics engine in Rust - official JS bindings.

cruxVM - Deterministic simulation runtime

Deterministic Simulation Testing core: PRNG (xoshiro256**), VirtualClock, MinHeap scheduler, SimEnv, strict guards, invariants, trace, RealEnv. Zero runtime dependencies.