About Me:

My name is Haotian Fang (WncFht), an undergraduate student at the UM-SJTU Joint Institute, Shanghai Jiao Tong University (SJTU), majoring in Electrical and Computer Engineering (ECE).

I'm passionate about Large Language Models — the full training stack from pre-training to post-training and reinforcement learning — and Embodied AI.

Currently, I'm a research assistant at the APEX Data & Knowledge Management Lab, SJTU. Over the past year (2025.09–2026.09) I was a research intern at Meituan, working on generative recommendation; before that, I was a research assistant at X-Lance Lab, SJTU, and an Agent Development Engineer at Shanghai Jiangran Technology, building a universal memory & context middleware for LLM agents.

I'm a strong believer in open-source culture. Check out my selected projects below!

I'm writing blogs on my website — notes and ideas from learning and research.

Publications:

• HCGRec: Hint-Conditioned Generative Recommendation with Semantic IDs — CIKM 2026 (paper · code)
• Empowering LLM Tool Invocation with a Tool-Call Reward Model — ICLR 2026 Poster (paper)

Research Interests:

Area	Topics
LLM	Pre-training, Post-training, RL & Reward Models
Embodied AI	Embodied Agents, VLA, World Models
Agent Systems	Memory & Context, Tool Calling, RAG

Selected Open-Source Projects:

Project	Role	Description
HCGRec	First Author	CIKM 2026 codebase — hint-aware GRPO + constrained decoding for semantic-ID generative recommendation
devin2api	Owner	Devin upstream → OpenAI Responses / Anthropic Messages compatible API proxy (Go)
agent-basic-skill	Owner	Reusable Codex/Claude skills and local agent configs
attention-calculator	Owner	Attention calculator reproduction + exact-arithmetic extension — machine-checkable definite-integral identities
zcode-teardown	Owner	Version-by-version teardown of ZCode IDE (55 versions) — signature snapshots & upload-mechanism analysis
Tencent-GRec	Owner	Tencent Ad Algorithm Competition 2025 — sequential recommendation + multimodal Transformer (HSTU)

Reach out to me: