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weeklyfoo #134 is here: your weekly digest of all webdev news you need to know! This time you'll find 32 valuable links in 5 categories! Enjoy!

🚀 Read it!

The Agent Stack Bet : Most production agents today feature fragile session logic, shared service accounts, and weak security models — four architectural bets for the next generation of agentic systems by Addy Osmani / ai , engineering / 8 min read

📰 Good to know

Introducing Claude Design : Anthropic's new product for creating designs, prototypes, and presentations using Claude Opus 4.7 — available in research preview for Pro, Max, Team, and Enterprise by Anthropic / ai , design / 7 min read

Claude Opus 4.7 System Prompt Changes : Claude's system prompt changes from Opus 4.6 to 4.7 — less pushy, more concise, new browser and Office agent tools, expanded safety guidelines by Simon Willison / ai / 7 min read

Six Levels of Dark Mode : Eight progressive methods for dark mode…