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ENGINEER / BUILDER / WRITER

Yu Jin

Building reliable AI systems and understanding software from the inside out.

I learn by building things.

AI SYSTEMS · AGENT ENGINEERING · WEB INTERNALS · FRAMEWORK DESIGN

Deco

/ DECO FRAMEWORK

A Web Component framework built from first principles to understand reactivity, rendering, scheduling, and framework trade-offs.

  • Reactive System
  • JSX Renderer
  • Scheduler
  • Lifecycle
  • Decorators
  • Plugins
  • Playwright
Explore the case studyView source

TypeScriptEducational19 stars2024–2025

deco/A SMALL FRAMEWORK
A DEEPER UNDERSTANDING
packages/
  core/          # reactivity & runtime
  renderer/      # JSX → DOM
  scheduler/     # task scheduling
  components/    # web components
  devtools/      # debugging tools

examples/
tests/
docs/
...

Build to understand.

SELECTED NOTES
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AI SYSTEMSAUG 02, 2026

长对话角色一致性的工程方法论：从提示词技巧到 Persona Harness 架构

从提示词技巧走向可复用、可评估的 Persona Harness 工程体系。

AI ENGINEERINGSEP 2026

当代码变得廉价：架构优先的 AI Code 思考与实践

当生成代码的成本下降，架构、约束与反馈系统如何成为新的核心能力。

WEB INTERNALSJUN 2026

Chromium 分层合成 vs Firefox WebRender 的 GPU 革命

从渲染流水线理解两种浏览器架构对图形合成问题的不同回答。

PHILOSOPHY
“I build to learn, and I write to think clearly.”

Curiosity drives better engineers. A deeper understanding of how things work leads to more reliable and useful software.
— Yu Jin