The Signal
Rui DiaoA former Google senior staff engineer's first-principles analysis of the tech that truly matters, finding the signal in the noise of AI, DeFi, and beyond.
| Platform |  | Pricing | Only free issues | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 19 | Subscribers | Read | ruidiao.substack.com |
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Latest Issues
Recent posts by this newsletter. Browse the email archive.
A Calendar for South Bay AI Events
I kept missing AI events in my area. Many local events are posted on Luma, an event discovery platform that has become popular in tech communities. I would stumble upon an interesting meetup a day after it happened, or find out about a talk...
Trying Agentic Browsing on Linux with Playwright MCP
The past few months brought a wave of agentic browser announcements. Perplexity launched Comet in July 2025, promising AI-powered web browsing with automated task handling. OpenAI released ChatGPT Atlas in October 2025, a macOS browser with...
Building My First MCP Server: What Vibe Coding Gets Right (and Wrong)
> “The computer is incredibly fast, accurate, and stupid. Man is unbelievably slow, inaccurate, and brilliant. The marriage of the two is a force beyond calculation.”
My AI News Dashboard: Built with Vibe Coding in a Week
## The Problem: Context Switching Between Sites
Authors
The writers behind this newsletter.
Indie Creator | Ex-Google Senior Staff Software Engineer
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