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YiWang24/README.md

Hi, I'm Yi Wang

AI Agent Engineer Β· Full-Stack Developer β€” CS @ York University Β· Toronto, Canada

Portfolio LinkedIn CCA-F Adventure X 2026


πŸ‘‹ About Me

I turn AI agents from demos into production-grade systems β€” my favorite part is the unglamorous engineering that makes them reliable, observable, and affordable.

What I'm good at

  • Agent orchestration β€” LangGraph state machines, typed tool contracts, bounded workflows that turn free-form agents into controllable pipelines
  • LLM reliability β€” dual-layer guardrails (cut non-compliant output ~15% β†’ <2% in production), fail-closed integrity gates, rule-engine-verified numbers, full audit trails
  • Cost & performance β€” input-hash caching (60–70% hit rate, <50 ms), agent regression evals (~10% fix-pass lift, token cost ~2M β†’ ~70k per task)
  • 0β†’1 delivery β€” SwiftUI / Next.js / FastAPI / Spring Boot with CI/CD and monitoring; taking products from concept to production, solo or in small teams

What I'm into β€” agentic product systems Β· applied LLM infrastructure Β· AI + full-stack delivery Β· developer knowledge platforms


πŸ… Highlights


πŸš€ Featured Projects

Core Products

1) SREDSimplify

SREDSimplify live preview

SR&ED claim console with evidence ingestion, structured pre-checks, and audit-friendly T661 drafting workflow for founders and reviewers.

Website

2) Ai DIY Docs

Ai DIY docs live preview

Engineering knowledge base covering CS core, AI agents, backend/frontend, and DevOps β€” built as a production-ready documentation platform.

Website GitHub Repository

3) Openbot

Self-hosted GitHub maintenance bot β€” issue triage, bug reproduction, auto-fix, code review, Q&A. Bounded workflows + regression eval: ~10% fix pass improvement, token cost ~2M β†’ ~70k per task.

GitHub Repository

Hackathon Products

πŸ† Possibility β€” Adventure X 2026 Track 1st Prize

Possibility live preview

AI decision companion for young professionals navigating career transitions. A 3-stage funnel: streaming AI chat surfaces emotional context & decision signals β†’ structured matching with 3 real human experiences across different outcomes with rationale β†’ paid conversion. Built solo in 6 days (189 commits) from concept to shipped product.

Website πŸ† GitHub Repository

FitLogic

FitLogic live preview

AI fitness coaching experience focused on adaptive training + nutrition logic, progress analytics, and coach-assisted personalization.

Website

SmartDiet Copilot

SmartDiet Copilot live preview

Agentic AI dietitian that combines receipt/fridge/meal perception with goal-aware planning to reduce waste and deliver actionable meal decisions.

Website GitHub Repository

SplitBase

SplitBase live preview

Base Pay bill-splitting app for group settlements with USDC, real-time status tracking, share links/QR flows, and optional NFT receipts.

Website GitHub Repository


πŸ›  Tech Stack

Agent / LLM LangGraph Β· LangChain Β· RAG Β· MCP Β· Structured Output & Guardrails Β· Agent Eval & Cost Control
Languages Python Β· TypeScript / JavaScript Β· Java Β· Swift Β· SQL
Backend & Frontend FastAPI Β· Spring Boot Β· Next.js / React Β· SwiftUI Β· PostgreSQL / pgvector Β· Redis Β· Celery
DevOps / Cloud Docker Β· GitHub Actions Β· AWS Β· Vercel Β· Linux

πŸ“Š GitHub Stats

GitHub Stats Top Languages


Turning AI agents into production systems with measurable outcomes.

Pinned Loading

  1. awesome-cca-f awesome-cca-f Public

    Jupyter Notebook 15 1

  2. AiDIY AiDIY Public

    MDX

  3. YiAgent/openbot YiAgent/openbot Public

    Open-source, self-hosted, BYO-API-key GitHub maintenance bot for individual OSS maintainers. Triage, review, fix, chat β€” your repo, your keys, your data.

    Python

  4. portfolio portfolio Public

    TypeScript