Ziyu “Teddy” C.

Builds real tools with AI agents — macOS apps · trading systems · full-stack

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Ziyu “Teddy” C.

Builds real tools with AI agents — macOS apps · trading systems · full-stack.
Based in Singapore · github.com/teddy8023mars

macOS app

QuickMD

Native macOS Markdown previewer — GFM, Mermaid, LaTeX, dark mode. Swift + AppKit.

View on GitHub ↗
macOS app · 3D

DeskCat

A 3D companion on your desktop whose head follows your mouse. SceneKit + procedural SDF modeling.

View on GitHub ↗
trading system

Intraday Trading Bot

Deterministic US-equities intraday system on the moomoo API — the LLM never touches the order trigger. TDD, layered risk controls, shadow-mode validation.

🔒 Source private — it trades a real account.
deep learning · medical imaging

Skin Lesion Analysis

My first deep learning project — ISIC 2018 dermoscopy analysis: ResNet50-U-Net lesion segmentation (Jaccard 0.79), an ablation across six encoder backbones, hair-removal preprocessing, and a 7-class lesion classifier.

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full-stack web

LeetCode Tracker

Self-hosted practice platform: bilingual problem sync, study plans, local sandboxed judge, AI tutor. React 19 · tRPC · Drizzle.

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