# HASH Simulation Platform HASH is an agent-based [[Simulation Modelling|simulation]] platform originally developed by HASH Labs. It grew out of a vision to make simulation-driven decision making accessible through a web-based IDE backed by a fast runtime, positioned as an open-source alternative to commercial tools like AnyLogic, FlexSim, and Simio. ## Components The legacy platform had three parts, all open source: - **hCore** — a browser-based IDE for authoring agent-based models in JavaScript, Python, or Rust - **hEngine** — a Rust runtime that executes hCore models at scale - **hCloud** — hosted execution for large parameter sweeps ## Current state HASH has pivoted away from simulation as its primary focus. hCore is deprecated and no longer officially supported. hEngine is published as a pre-release technology preview with an unstable codebase. The company has refocused HASH as an all-in-one workspace for structured knowledge and self-building knowledge graphs, with agent-based simulation a longer-term goal to be revisited through generative-AI-driven behaviour definition. Both the legacy hCore IDE and hEngine remain publicly available on GitHub for anyone who wants to run or study them. # References - [HASH (main monorepo)](https://github.com/hashintel/hash) - [HASH sim-engine (GitHub)](https://github.com/hashintel/labs/tree/main/apps/sim-engine) - [HASH sim-core example projects](https://github.com/hashintel/labs/tree/main/apps/sim-core/example_projects) - [HASH Core (platform page)](https://simulation.hash.ai/platform/core) - [HASH Engine (platform page)](https://hash.ai/platform/engine) - [HASH Cloud (platform page)](https://simulation.hash.ai/platform/cloud) - [Why not simulate? (HASH Blog)](https://hash.ai/blog/why-not-simulate) — early vision essay - [Reddit discussion (r/tlaplus)](https://www.reddit.com/r/tlaplus/comments/hcs5cf/hash_a_free_online_platform_for_modeling_the_world/)