Kai and Maya cover the top stories from Hacker News for Friday, March 20, 2026:

- Le Monde tracks France's aircraft carrier in real-time via Strava fitness data in a major OPSEC failure

- Microsoft publishes a sweeping blog post pledging to fix Windows 11 quality across performance, reliability, and design

- OpenCode becomes one of the largest open-source AI coding agents with 126K GitHub stars and 5 million monthly developers

- OpenUI rewrites their Rust WASM parser in TypeScript and gets 3x faster by eliminating serialization overhead

- Practical Engineering explores the wild engineering and ethical history of the Los Angeles Aqueduct

- A developer reconstructs VisiCalc in under 500 lines of C, highlighting the highest impact-to-complexity ratio in software history

- MoonshotAI's Attention Residuals paper introduces dynamic layer-to-layer attention in Transformers, authored by a high school student