Each topic below is a short course of self-contained HTML lessons — one concept, one tangible win, with practice you can do in minutes.
Mission: replace daily bash scripts — file/text transforms, API calls, subprocess orchestration, scheduling — with one toolchain, Bun, whose scripts run identically and type-checked on macOS, Linux, and Windows. Lessons assume you already know JS/TS. Lessons published: 6
Take Lesson 0006's bun:sqlite skills online: D1 is the same SQLite dialect, hosted by Cloudflare and queryable from a Worker — or from your own Bun scripts over HTTPS. Lessons provision a real D1 database, apply schemas with wrangler, and query it with prepare().bind().run(). Lessons published: 3
Everything here is written to be beautiful and revisitable: lessons link to reference cheat-sheets, cite the official sources they draw on, and end with recall practice. Print-friendly.