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Projects

Games, web services, AI agents, dev tools, and more.

Coppong

Group coffee ordering web app. Anonymous participation, favorites, real-time order status.

Next.js TypeScript Supabase PWA

coppong.com

Critter Survivors

Released

Cute animal character vampire survivors clone mobile game.

TypeScript PixiJS Capacitor Mobile

Google Play

Hexillion

Coming Soon

Hexagonal merge puzzle: connect matching chips and climb all the way to 1,000,000.

TypeScript React Capacitor Mobile

GitHub

mcp-server-xlwings

MCP server for Excel automation. Works with DRM-protected files.

Python MCP xlwings

mcp-server-xlwings

klayout-draw-mcp

MCP server for drawing semiconductor GDS layouts with KLayout. Shapes, vias, wires, and DRC.

Python MCP KLayout EDA

GitHub

Lottery

21 lottery/selection games for schools, companies, and broadcasts.

TypeScript Three.js Game

lottery

Arcade

Browser arcade game hub. 19 single/multi games, space theme.

TypeScript Three.js Game

arcade

COMPASS

Optical simulation documentation platform. Cross-solver Optical Modeling.

Python VitePress Optics

compass

Euiyun Live

Real-time seminar/training Q&A. No sign-up — questions, polls, and live reactions.

Cloudflare Workers Durable Objects D1 React

live.euiyun.com

Mobile Image Sensor DB

Open database of smartphone camera image sensors. Search and compare 440+ sensor specs and 500+ phones.

Cloudflare Pages D1 Python Data

sensors.euiyun.com

Glossary

Open Source

Apache-2.0 self-hosted glossary platform. Separates concepts from spellings to catch duplicates; tools look up surfaces via API.

Next.js PostgreSQL pgvector Open Source

GitHub

AgentGuard

Open Source

MIT-licensed local-first policy editor for coding agents. Configure Claude Code permissions in a GUI.

Tauri Rust SvelteKit Open Source

GitHub