Products

Three products, one computation core.

Each product attacks the same problem from a different layer: the application, the operating system, and the data format.

YuanYu

Consumer productLive

Multi-system chart calculation for BaZi, Zi Wei Dou Shu and Vedic astrology, with true-solar-time correction, written reports and companion hardware.

  • True solar time correction before casting
  • Cross-system chart reports
  • Passive NFC companion hardware
Open yuanyucore.com

xHunOS

Research projectIn development

A bare-metal operating system in the lineage of TempleOS: RISC-V, Ring 0, a fixed-width 16-bit Hanzi character model and contiguous-sector storage. Designed for contemplation, not telemetry.

  • 25 MB design target for the whole system
  • Ring 0 identity-mapped memory, no paging
  • Air-gapped by design
Open xhunos.com

UCP

Open-source engineOpen source

The Unified Calendar Protocol locks seven world calendars to a single UTC timestamp. The reference implementation is published on npm and GitHub under the MIT licence.

  • Seven calendar systems from one timestamp
  • One decodeUCP() call
  • Full-year almanac generator
Read the developer docs

What they share

All three run on the same assumptions: UTC as ground truth, corrections applied explicitly, and no hidden state. A chart produced by the app and a timestamp decoded by the library come from the same model of the sky.

Start with the engine

The calendar core is free, documented and MIT licensed. It is the fastest way to see how we work.

Go to the developer docs