Hey, I'm Rory Cai
Agent Engineer & Design Engineer

Agent engineer and design engineer at Parfit.

Previously a frontend engineer at Tencent. Graduated from Harbin Institute of Technology (Shenzhen).

Recent posts (5 of 16)

Sep 19, 2026
Prompts, Skills, and MCP Will All Disappear. People Only Pay for Outcomes
Prompts, skills, hooks, plugins — they're all a transitional phase of AI apps. What survives is a marketplace of agents that sell nothing but results.
Aug 9, 2026
AI Won't Close the Gap Between People, and 7 Other Notes
AI won't narrow the gap between people. It does the opposite. It amplifies creativity and scales judgment, but it also amplifies stupidity and bias.
Sep 14, 2025
A New Less Release Broke Tailwind's @apply, and Tailwind Took the Blame
One of our large projects uses a micro-frontend architecture. The stack is SSR + Vue 3 + NestJS + Webpack4, the style preprocessor is Less, and the project also integrates Tailwind, which most of us use day to day to…
Jul 16, 2025
How Long Is an Emoji, Really? A Deep Dive into Emoji Strings in UTF-16
In day-to-day frontend work we deal with emoji all the time. If you're new to this, you've probably run into problems like these: You use split on a string that contains emoji, and it comes out broken You read .length…
Jun 8, 2025
How to Speed Up Frontend Project Builds
Don't put the build steps in the Dockerfile The Dockerfile should only be responsible for building the runtime image Cache nodemodules instead of installing every time; reuse it when package.json hasn't changed Use npm…