DTF:HN for March 21, 2026

Your Daily Tech Feed covering the top 10 stories on Hacker News for March 21, 2026. Featuring: OpenCode – Open source AI coding agent, Mamba-3, FFmpeg 101 (2024), A Japanese glossary of chopsticks faux pas (2022), Molly Guard, and more. Stories covered: 1. OpenCode – Open source AI coding agent https://opencode.ai/ HN discussion: https://news.ycombinator.com/item?id=47460525 2. Mamba-3 https://www.together.ai/blog/mamba-3 HN discussion: https://news.ycombinator.com/item?id=47419391 3. FFmpeg 101 (2024) https://blogs.igalia.com/llepage/ffmpeg-101/ HN discussion: https://news.ycombinator.com/item?id=47463547 4. A Japanese glossary of chopsticks faux pas (2022) https://www.nippon.com/en/japan-data/h01362/ HN discussion: https://news.ycombinator.com/item?id=47460452 5. Molly Guard https://bookofjoe2.blogspot.com/2026/02/molly-guard.html HN discussion: https://news.ycombinator.com/item?id=47455138 6. We rewrote our Rust WASM parser in TypeScript and it got faster https://www.openui.com/blog/rust-wasm-parser HN discussion: https://news.ycombinator.com/item?id=47461094 7. Ghostling https://github.com/ghostty-org/ghostling HN discussion: https://news.ycombinator.com/item?id=47461378 8. Fujifilm X RAW STUDIO webapp clone https://github.com/eggricesoy/filmkit HN discussion: https://news.ycombinator.com/item?id=47435081 9. Linux Applications Programming by Example: The Fundamental APIs (2nd Edition) https://github.com/arnoldrobbins/LinuxByExample-2e HN discussion: https://news.ycombinator.com/item?id=47462483 10. The Los Angeles Aqueduct Is Wild https://practical.engineering/blog/2026/3/17/the-los-angeles-aqueduct-is-wild HN discussion: https://news.ycombinator.com/item?id=47416543