SHEN YIFull-Stack & AI

Paris • Singapore • Shanghai

AI Engineering Lab

Build AI systems with traceable sources, measurable quality, and explicit failure handling.

The AI Engineering Lab documents the methods behind my RAG consulting work: how to build reliable retrieval systems, verify them with evidence, and teach the workflow through practical experiments.

$ lab --method
▸ build  source-aware RAG systems
▸ measureretrieval + generation quality
▸ learn  a 30-day engineering path
● open methods for reliable AI

Build → Measure → Learn

Three projects covering construction, evaluation, and training.

Build the system, measure its behavior, and turn the results into a repeatable learning path.

RAG Engineer workflow from source knowledge to grounded, cited answersOpen source · Method

RAG Engineer

Build, debug, review, and operate reliable RAG systems from source documents to cited answers.

Explore the method
RAG Evaluation workflow from traces to measured quality and readiness auditsOpen source · Method

RAG Evaluation

Measure AI quality with traces, metrics, validated judges, and readiness audits.

Explore the method
Supplementary lesson

RAG Formation Continue · 01 · Production improvement loop

Turn interaction logs and user feedback into an evidence-backed RAG improvement plan with Claude Code or Codex.

Open lesson
Supplementary lesson

RAG Formation Continue · 02 · Build your own RAG chatbot from zero

Build a four-channel RAG baseline with grounded answers, cited sources, and honest refusals—before adding feedback or follow-up handling.

Open lesson

Consulting in practice

Methods used in client delivery.

These public projects support the same goal as my client work: AI systems with traceable outputs, measurable quality, and defined operating limits.