Open Source · Federated · Modular
Federated Solution Stack
Build better systems. Together.
Product Lines
One stack, every solution.
A modular ecosystem of open-source tools, built to work together.
A
A-line
Online Judging
The ultimate online judge ecosystem — platform, runner, and ranking engine.
U
U-line
Identity & Auth
Unified authentication and authorization, built for security and interoperability.
S
S-lineComing Soon
Intelligent Agents
Next-generation agent tooling. Stay tuned.
— Coming Soon
Join the Stack
Open source. Open future. We build in the open — contributions, issues, and ideas are always welcome.