We build tools for real engineering work — private by default, practical in daily use.
We come from engineering research — computational mechanics and particle simulation. That research is the root of both things we do: our own simulation software, and the practical AI tools we built to run our daily engineering work and kept because they were useful.
Our main work runs in two threads. One is our own engineering software: Hesuan (Phynexis), a platform for particle and multiphase simulation grown out of our research. The other is the practical AI layer: Xiaohe Agent, a self-hosted agent platform with skills for documents, presentations, PDFs, and video. Xiaohe runs on top of industry agent harnesses and language-model APIs — the base models and the coding-agent runtimes come from Anthropic, DeepSeek, Kimi, OpenAI and others, and we don’t develop those. Our work is the layer that makes agents useful for real engineering work.
Our products fall into two lines. Xiaohe is the self-hosted agent platform: CLI, Session API, Web UI, Client, and Skills Hub. Heyue (Xiaohe Reader) is the Markdown reader that came out of that work. Hesuan (Phynexis) is particle and multiphase simulation. Hetu (Phynexis Graph) draws the simulation setup and writes the files the solver and Heshi read. Heshi (Phynexis Viewer) turns the result into an interactive scene, in the browser or in Blender. OpenFOAM is the fluid-solver distribution we maintain.
A simulation is drawn once in Phynexis Graph. That picture writes the Phynexis script, the dictionaries in an OpenFOAM case, and the scene Phynexis Viewer reads. Each tool reads its own files. People and agents can edit the picture, or edit those files directly.
Reach us at support@xiaohe.team for product questions and partnerships.