Hippogriff

projects

Remo

Remo

LiDAR-powered room redesign agent with shopping list support

TypeCraft

A Space Invaders typing game that makes you faster

Talent Promo

Talent Promo

Resume writing agent that discovers your hidden strengths

blog

Agent Memory Series: Letta Code's Git-Backed Memory Repo

Letta Code delegates memory curation to the model: a git-backed memory folder, an in-band writer and an out-of-band dreamer to rewrite the memory. Traced with LangSmith: what git actually gets used for.

Agent Memory Series: Graphiti - A graph that tells time

Facts go stale because the world keeps moving, and lots of memory systems fail exactly there. A deep dive into Graphiti, the knowledge graph that moves memory forward by invalidating instead of overwriting.

Agent Memory Series: Mem0 Deepdive

Mem0 uses an LLM to extract flat, add-only memory (or facts), and it uses semantic search to retrieve relevant memory and boosts the ranking by using keyword matching (BM25) and entity matching.

Reading Anthropic's Memory API

Anthropic's Memory API elevates file-based memory into a distributed primitive: per-file linearizability via compare-and-swap. Local filesystem to the agent, distributed semantics underneath. My best guess at the design.

How Agents Communicate Inside A Team

I dug into Claude Code's .claude folder to understand how agents talk to each other. Then I rebuilt it from scratch in ~320 lines of Python using the Claude Agent SDK.

Remo: From Moldy Bathroom to Shoppable Redesign, All AI-Orchestrated

Built an iOS app at the Claude Code x Cerebral Valley hackathon — photograph your room, scan with LiDAR, chat with an AI design consultant, get photorealistic redesigns, and walk away with a shoppable product list.

What I learned from building a resume agent

Finishing an unfinished business, sharing some learnings on agent design

Why I built TypeCraft

Daily grind becomes daily play

about

Hi, I'm Vicki Zhang. I am a senior full stack software engineer who is currently building agents. I am interested in what's possible when AI reshapes daily life. Hippogriff.io is a site for the things I made on the journey of reimagining human & app interaction. Talent-promo is an agent that helps you discover your hidden strength for your target job, hoping to give you constructive support in a stressful process. Typecraft is the one that showcases how a small, well-crafted app can make a routine task more fun.

My career story is about constantly evolving. In 2019, I pivoted into software engineering after an M.S. degree in quantitative finance and several years of working in finance. In 2024 I started to build AI-related products as a volunteer duty at work, acting as maintainer for an internal chatbot in the place I work. In 2025, I was lucky enough to start building workflow AI agent full time thanks to the support from the leadership on a proof of concept that I pitched. In 2026, I am keep learning and discovering the beauty of agent building.

Outside of work, I like wine, distance running (finished 4 NYC marathons), weight training, and street photography. And lately, vibe-coding.