TSAI_CHENG-HUNG
SYS/05 — SELECTED WORK

PROJECTS

Systems shipped, not just demoed.

FIG_01FEATURED
012026–

Construction Knowledge RAG & Steel Procurement Meeting Automation

A production-oriented construction knowledge assistant and steel procurement meeting generator built with LangGraph, hybrid RAG, Gemini grounded search, structured extraction, and DOCX automation.

LangGraphFastAPIHybrid RAGChromaDB
FIG_02FEATURED
022025–

Eastern Mysticism Platform

Multi-agent consultation platform with SSE streaming and a custom Zi-Wei chart engine.

LangGraphGPT-4oQuartRedis
FIG_03FEATURED
032025–

Multi-modal RAG Knowledge Base Platform

A production-grade, fully containerized multi-modal RAG platform with real-time SSE streaming, multi-turn conversation compaction, session-scoped retrieval, and an admin console — all running locally via Docker Compose.

LightRAGRAGOllamaChromaDB
FIG_04FEATURED
042025–2026

Ziwei Doushu AI Platform — From a Take-Home Test to a Full Multi-Agent Product

An account-based AI fortune-telling platform pairing a deterministic Ziwei Doushu chart engine (iztro) with a genuine parallel multi-agent LangGraph pipeline, RAG knowledge base, and a full subscription/token system — deployed on Docker + Render.

LangGraphGoogle GeminiiztroChromaDB RAG
FIG_05FEATURED
052024–2025

RAG Air-Pollution Q&A

My Master's thesis system — deployed publicly via DuckDNS + Nginx with HTTPS.

bge-m3ChromaDBGemma 3:12BLangChain
FIG_06
062025

Unsloth LoRA Fine-tuning System

A modular LoRA fine-tuning pipeline built on Unsloth for sentiment analysis, with 4-bit quantization, early stopping, and adaptive Llama-2/Llama-3 support.

UnslothLoRALlama-3PyTorch