The todo from part one loses everything on exit. We teach it to keep tasks in a file, step by step: modules and pub, Result and the ? operator, errors without unwrap, tests next to the code, a release build. Still zero dependencies.
Install the toolchain, make a first project, and write a terminal todo list with zero dependencies. Along the way: ownership, the borrow checker and usize overflow, every one of them with the compiler's real output.
serv 0.3 serves a folder of markdown as a site: `/about` finds `about.md`, a folder opens as its README, links point at clean URLs, diagrams get drawn. What it cost — a network request for mermaid, and a megabyte and a half for syntax highlighting.
icofon takes a folder of SVGs and builds an icon font, a stylesheet and a preview page. What happens to a drawing on its way from SVG to glyph, where the tool runs into the limits of the format, and why codepoints can't be handed out fresh on every build.
Problem:
