Record, generate, run: AI-powered UI test generation for iOS

https://engineering.grab.com/ios

Where's the raccoon with the ham radio? (ChatGPT Images 2.0)

https://simonwillison.net/2026/apr/21/gpt-image-2

Building a fault-tolerant metrics storage system at Airbnb

medium.com/airbnb-engineering/build...

Thank You For Being a Friend

blog.codinghorror.com/thank-you-for-being-a-fr...

The Network Poller

https://internals-for-interns.com/posts/go-netpoller

SQL functions in Google Sheets to fetch data from Datasette

https://simonwillison.net/2026/apr/20/datasette-sql

Claude Token Counter, now with model comparisons

simonwillison.net/2026/apr/20/claude-token...

Headless everything for personal AI

simonwillison.net/2026/apr/19/headless-eve...

Changes in the system prompt between Claude Opus 4.6 and 4.7

simonwillison.net/2026/apr/18/opus-system-...

Claude system prompts as a git timeline

simonwillison.net/2026/apr/18/extract-syst...

Adding a new content type to my blog-to-newsletter tool

simonwillison.net/guides/agentic-engineeri...

The Human Infrastructure: How Netflix Built the Operations Layer Behind Live at Scale

netflixtechblog.com/the-human-infrastructure...

Dobby's Dirt Disposal Bag

https://bruceediger.com/posts/dobbys-vacuum-bag

datasette 1.0a28

https://simonwillison.net/2026/apr/17/datasette

Predicting Risk in Content Launches: How Data-Driven Insights can Transform Launch Planning

netflixtechblog.medium.com/predicting-risk-in-conte...

Qwen3.6-35B-A3B on my laptop drew me a better pelican than Claude Opus 4.7

https://simonwillison.net/2026/apr/16/qwen-beats-opus

How The New York Times Games Team Delivered Accessible, Cross-Platform Dark Mode

open.nytimes.com/implementing-dark-mode-i...

Why post-mortem action items die

incident.io/blog/why-post-mortem-act...

datasette.io news preview

simonwillison.net/2026/apr/16/datasette-io...

datasette 1.0a27

https://simonwillison.net/2026/apr/15/datasette

Gemini 3.1 Flash TTS

https://simonwillison.net/2026/apr/15/gemini-flash-tts

Quoting Kyle Kingsbury

https://simonwillison.net/2026/apr/15/kyle-kingsbury

datasette PR #2689: Replace token-based CSRF with Sec-Fetch-Site header protection

simonwillison.net/2026/apr/14/replace-toke...

Trusted access for the next era of cyber defense

simonwillison.net/2026/apr/14/trusted-acce...

Cybersecurity Looks Like Proof of Work Now

simonwillison.net/2026/apr/14/cybersecurit...

Privacy-first connections: Empowering social experiences at Airbnb

medium.com/airbnb-engineering/priva...

Air Care don't care

https://bruceediger.com/posts/air_care_ftcollins

Scaling Recommendation Systems with Request-Level Deduplication

medium.com/pinterest-engineering/sc...

Managing context in long-run agentic applications

slack.engineering/managing-context-in-long...

Btrfs

internals-for-interns.com/posts/btrfs-filesystem