xz — writinghttps://zxa233.com/writing/Build notes from xzMaking an AI write one song, not ten ideashttps://zxa233.com/writing/tunepick-one-song/https://zxa233.com/writing/tunepick-one-song/Sat, 26 Sep 2026 00:00:00 +0900Why LLM-generated music sounds like a chain of unrelated ideas, and the four structural rules Tunepick uses to make it sound like one song.Three options are not one prompt run three timeshttps://zxa233.com/writing/three-options/https://zxa233.com/writing/three-options/Fri, 25 Sep 2026 00:00:00 +0900How Tunepick gets three genuinely different choices out of a language model: a brief per slot, rotating briefs, a similarity score, and one targeted re-ask.Running a 27B model on my Mac every dayhttps://zxa233.com/writing/local-27b-on-a-mac/https://zxa233.com/writing/local-27b-on-a-mac/Thu, 24 Sep 2026 00:00:00 +0900My setup for running Qwen3.8-27B locally with MLX: 4-bit weights, thinking modes, real speed and memory numbers, and a same-origin proxy so it streams to an iPhone.A job queue where a restart loses nothinghttps://zxa233.com/writing/eki-restart-loses-nothing/https://zxa233.com/writing/eki-restart-loses-nothing/Wed, 23 Sep 2026 00:00:00 +0900Design notes from eki, my Mac station for local models and coding agents: stateless engine, detached workers, one SQLite file, and routing that explains itself.A guestbook with no words in ithttps://zxa233.com/writing/guestbook-without-words/https://zxa233.com/writing/guestbook-without-words/Tue, 22 Sep 2026 00:00:00 +0900How the melody guestbook on zxa233.com works: eight notes on a pentatonic scale, a tiny Cloudflare Worker, KV storage, and rate limiting without storing IP addresses.