Projects

Things I've built, on and off the web.

7 projects · 2023–2026

1. 2026

   • manodict (opens in new tab)

     manodict

     Japanese dictionary based on 魔法少女ノ魔女裁判

     React · PostgreSQL · Redis · S3

   • yCAPTCHA (opens in new tab)

     yCAPTCHA

     CAPTCHA widget for small communities and subcultures — site owners build challenges around shared in-jokes (subway lines, rhythm game charts, niche memes) instead of boring traffic lights.

     Next.js · Drizzle · Redis

   • maiSQL (opens in new tab)

     maiSQL

     SQL practice skinned as the maimai rhythm game — solve exercises against a 200k-row SQLite database in the browser, scored PERFECT / GREAT / GOOD / MISS.

     React · sql.js · Cloudflare Workers

2. 2025

   • vocaloid-type (opens in new tab)

     vocaloid-type

     Typing rhythm trainer for VOCALOID and UTAU tracks, with maimai-inspired grading.

     Next.js

3. 2024

   • RAG-template (opens in new tab)

     RAG-template

     Archived

     Enterprise RAG starter — document ingestion, embeddings, and chat over an organization's knowledge base.

     Next.js · LangChain

4. 2023

   • bdfz.app (opens in new tab)

     bdfz.app

     Archived

     北大附中 AI 助手 — RAG over school documents with OpenAI embeddings, serving students and teachers.

     Next.js · Supabase · OpenAI

   • AInnotator (opens in new tab)

     AInnotator

     Archived

     Annotate PDFs with AI.

     Next.js