https://xinyun-zettelkasten.vercel.app All notes — learning in public, writing things down. en Mon, 13 Apr 2026 10:36:01 GMT https://xinyun-zettelkasten.vercel.app/literature-notes/2026-04-12_berkeley-benchmark-handout https://xinyun-zettelkasten.vercel.app/literature-notes/2026-04-12_berkeley-benchmark-handout Sun, 12 Apr 2026 00:00:00 GMT Berkeley RDI proved a bot can score 100% on top AI benchmarks without solving a single task. What Goodhart's Law means for how we evaluate AI agents. Written in Chinese. https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-11_my-system-architecture https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-11_my-system-architecture Sat, 11 Apr 2026 00:00:00 GMT A software engineer's personal system architecture — five layers from knowledge to mobile access, with self-improving automation in between. Written in Chinese. https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-11_the-config-file-that-knows-me https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-11_the-config-file-that-knows-me Sat, 11 Apr 2026 00:00:00 GMT What happens when an engineer starts documenting herself instead of just her systems. On self-knowledge, automation, and why a terminal message at 1am felt warmer than a phone call. https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-03_the-system-that-builds-itself https://xinyun-zettelkasten.vercel.app/permanent-notes/2026-04-03_the-system-that-builds-itself Fri, 03 Apr 2026 00:00:00 GMT I tried to design a writing habit. The habit designed the writing instead. https://xinyun-zettelkasten.vercel.app/permanent-notes/2024-11-10_zettelkasten https://xinyun-zettelkasten.vercel.app/permanent-notes/2024-11-10_zettelkasten Sun, 10 Nov 2024 00:00:00 GMT A personal knowledge management system using fleeting notes, literature notes, and permanent notes to build a network of interconnected ideas.