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David Yin

I build with AI and share hands-on tool tests, engineering practice, and what I learn along the way.

19 years in engineering & architecture · 13 years leading tech teams · Hangzhou, China

Explore my content About me
3 videos 112 articles 10 indie products
X YouTube (English) Bilibili YouTube (Chinese)
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Products I build

A few independent projects, from idea to launch and still evolving.

All 10 products
01 New CLI tool Developer tool pi-autothink Every message, the AI decides how deep to think 02 web app Learning Kaikouba See the Chinese, say it in English

Recent videos

Hands-on tests of AI coding tools and AI jargon, decoded — in English.

All 3 videos
EmbeddingGemma 2: One Model Searches Text, Photos and Audio 08:16 New 2026 · 10 · 11 EmbeddingGemma 2: One Model Searches Text, Photos and Audio Mac Unified Memory vs RTX 5090: What to Buy for Local AI 07:53 2026 · 10 · 11 Mac Unified Memory vs RTX 5090: What to Buy for Local AI Claude Code vs Oh My Pi: The Token Bill Nobody Checks 08:07 2026 · 10 · 10 Claude Code vs Oh My Pi: The Token Bill Nobody Checks
Chinese videos 239 The original series in Chinese, updated almost daily All 239 Chinese videos

Recent essays

Written when there is a judgment to make: AI coding, engineering management, indie dev and industry notes — in Chinese.

All 112 essays
New 2026 · 10 · 16 17 min 如何在普通 Mac 上免费搜照片和文件？用 DigUp，说一句话就能找 DigUp 免费开源，在 Mac 本机跑，文件不上传。拖进应用程序或一行 brew 命令就装好；首次要下模型、建索引，之后用中文一句话搜照片、合同、截图，还能跳到视频那一秒。 Read the essay
  1. #110 Codex Cloud 是什么：合上笔记本，你的代码任务还在跑 2026 · 10 · 13 · 7 min
  2. #111 Claude Marketplace 和插件市场：342 个插件怎么装、怎么用 2026 · 10 · 13 · 6 min
  3. #109 Anthropic又来了：这次点名智谱GLM-5.3 2026 · 09 · 30 · 7 min
  4. #108 Ammonix 不让大模型拍板：不许做的先删掉 2026 · 09 · 21 · 8 min
  1. EN Claude Code Deleted 80% of Its System Prompt — Coding Evals Didn't Budge. Your Rules Might Be Making the Model Dumber English version · 8 min
  2. EN What Is Loop Engineering, Really? I Didn't Explain It Well Last Time — Let's Start Over English version · 7 min
  3. EN Everyone's Talking About Agents and Skills: Learn These Two Concepts and You Don't Need to Code First English version · 8 min
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FDE · end-to-end delivery · one-off technical deep-dives.

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Zero-to-one product delivery, architecture & engineering org reviews, AI adoption
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