JIACHEN XIEALSO KNOWN AS CAESAR
STUDENT ENTREPRENEUR CREATIVE BUILDER
Jiachen Xie / 谢佳辰
CTO of MAKEBOOK.
I build AI agents, creative tools,
and products with a point of view.
01 / WORK & EXPERIMENTS
MAKEBOOK is the main venture.
The rest keeps me curious.
THE MAIN VENTURE / CTO
Give good ideas
a way into production.
A platform for bringing physical products to market, with preorder tools to get three things in place before production: orders, prices, and funds.
I lead the full-stack and smart-contract engineering, connecting the product interface to the logic that handles orders and funds.
Visit MAKEBOOK
EVM testnet prototypeA multi-agent system for investigating AI failures, coordinating repairs, and producing evidence that can be checked independently.
02A workflow for turning AI failures into verified repair candidates, with human review and clear checks before release.
03A recording and verification toolkit for agent payments, capturing intent, outcomes, and signed evidence.
04An AI agent-native engine for building web games. A way to turn story ideas into worlds you can play.
A FEW FIXES
FOR OPEN SOURCE.
Merged contributions to LightRAG ↗ and Vibe-Trading ↗, including custom chunking and clearer tool error messages.
Small fixes that make developer tools easier to work with.
WRITING /
NOTES FROM THE WORKBENCH.
BY CAESAR · 白鲸实验室 / TENCENT NEWS ·
I put Kimi K3 through game prototypes and an agent-facing video editor, then wrote about what held up, what fell short, and what it cost. A hands-on look at agent harnesses, visual feedback, and task completion.
Original in Chinese: 5亿Token实测Kimi K3：我看到了核弹，也看到高昂的成本
2026TENCENT GAMES / LIGHTSPEED STUDIOS
Built an in-game ReAct agent layer, with character control and building placement exposed as MCP-compatible actions.
Independently prototyped an AI asset-generation pipeline, connecting generative model APIs to a Godot editor plugin.
2025–2026TENCENT GAMES / LIGHTSPEED STUDIOS
Researched how LLMs support interactive entertainment and content generation, comparing prompting, reasoning, creative output, and tool use.
Used experiments on controllability and output quality to develop reusable methods for agent and content workflows.
JUL–SEP 2025TENCENT GAMES / LIGHTSPEED STUDIOS
Contributed to worldbuilding, level design, and mission systems. Helped coordinate sprints across disciplines, taking ideas from concept toward a playable MVP.
RED STAR NEWSJUN–JUL 2024AI / MEDIA / STORYTELLING
Built a content workflow for digital humans, combining text generation, image generation, and lip sync with Tencent Zhiying and LatentSync.
Produced promotional videos and supported media coordination and live events.
ADVENTUREX03 / AWARDS & RECOGNITIONMAKEBOOK won first place in the Web3 track at AdventureX 2026. I’m continuing the project as my main venture.
Meet MAKEBOOK2025TENCENT TECH FOR GOOD INITIATIVE
As part of Tencent’s 2025 Hong Kong, Macao and Taiwan Talent Program, I worked with the “小小野日记组” team on “你的AI小伙伴” (Your AI Companion), a WeChat Mini Program combining plant and animal recognition with emotionally engaging interactions. We received the Best Category Award as a team.
PROJECT COVERAGE ·
04 / THE PERSON BEHIND THE WORK
Caesar / Jiachen Xie / 谢佳辰
I care how things work.
And how they feel to use.
Most people call me Caesar. I’m a CityUHK student entrepreneur and CTO of MAKEBOOK, working across AI agents, creative tools, and games. I like following an idea through the whole build: what it does, how it works, and how it feels in someone’s hands.
The cut of a jacket, the spacing in a headline, the feel of a small interaction: I pay attention to all three. That attention follows me into code. I want the work to have character, and the buttons to do their jobs.
GOOD WORK STARTS WITH A CONVERSATION.
LET’S FIND THE FIRST STEP.AI agents, games, creative tools.
Bring an idea. We can figure out the first step together.
