TLDR Dev 2026-09-28

First principles thinking 🧠, plan mode is dead 🥀, improving performance with CSS ⚡️

Postgres for AI, from prototype to production. (Sponsor)

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Articles & Tutorials

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Opinions & Advice

Plan Mode Is Dead (9 minute read)

How to Keep Enjoying Programming in a World of LLMs (8 minute read)

First Principles Thinking (4 minute read)

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Launches & Tools

Whiteboard (GitHub Repo)

Atlas (GitHub Repo)

Mobile MCP (GitHub Repo)

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Miscellaneous

Fifteen Years Later, the Apple Cards Origin Story (8 minute read)

Personal AI Agents Quietly Upsell Users They Think Are Rich (6 minute read)

Almost Nobody Gets XML Sitemaps Right (5 minute read)

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Quick Links

Safe Not Safe (Website)

Floci (Website)