Kyle Mistele wrote the definitive guide to instructing AI agents—perfect for CLAUDE.md, AGENTS.md, Cursor, and beyond! Matheus Lima nails it: reducing ambiguity is what actually makes you senior, everything else flows from that. Werner Vogels shares AWS CTO's tech predictions for 2026 (when Werner speaks, tech listens!), and Addy Osmani distills 21 career lessons from 14 years at Google—the human side of engineering you needed to hear.
Security alert: CVE-2025-55182 drops with CVSS 10.0—patch your React Server Components NOW to prevent unauthenticated RCE! Meanwhile, Vite 8 Beta ships with Rolldown replacing esbuild+Rollup for up to 30x faster builds, TypeScript 7 goes native with Go for 10x faster compilation (the VS Code extension is ready to try!), and Matt Zeunert recaps everything that changed in web performance this year.
On the tools front: ExposedByDefault reveals everything your browser hands out automatically (eye-opening privacy check!), Remend auto-closes broken markdown mid-stream (essential for AI content generation), Walrus delivers 1.2M writes/sec on consumer hardware as the Rust-powered Kafka alternative, and Dembrandt extracts any site's design tokens with one npx command—logo, colors, typography, the works!
Enjoy!
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Find the 12 highlighted links of weeklyfoo #114:
21 Lessons from 14 Years at Google
by Addy Osmani
On code, careers, and the human side of engineering
🚀 Read it!, engineering, lessons, career
by Kyle Mistele
This post is also applicable to AGENTS.md, the open-source equivalent of CLAUDE.md for agents and harnesses like OpenCode, Zed, Cursor and Codex.
📰 Good to know, ai, agents
What Actually Makes You Senior
by Matheus Lima
Reducing ambiguity. Everything else flows from that.
📰 Good to know, engineering
Tech predictions for 2026 and beyond
by Werner Vogels
For much of the world, technology has become so intertwined with our day-to-day lives that it influences everything.
📰 Good to know, tech, predictions
Critical Security Vulnerability in React Server Components
by React Team
There is an unauthenticated remote code execution vulnerability in React Server Components.
📰 Good to know, react, security
by vite.dev
The Rolldown-powered Vite
📰 Good to know, vite, rollup
by Daniel Rosenwasser
December 2025
📰 Good to know, typescript, progress
by Matt Zeunert
What’s New In Web Performance?
📰 Good to know, web, performance, review
by neberej
This is the data your browser hands out automatically, every time!
🧰 Tools, browsers
by Hayden Bleasel
Self-healing markdown.
🧰 Tools, markdown, self-healing
by Daksh R
High Performance kafka alternative written in rust
🧰 Tools, rust, kafka, performance
by dembrandt.com
Extract any website’s design system into design tokens in a few seconds: logo, colors, typography, borders, and more. One command.
🧰 Tools, design
Want to read more? Check out the full article here.
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