Turns out that byte-compiling elisp will replace calls to some primitive functions! https://emacs.stackexchange.com/a/30071/304 (faster, but stops redefining)
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Go has an elegant approach to defining example functions, which are shown in docs as `main()` with the output: https://go.dev/blog/examples
I'm pretty impressed with Cursor: I've successfully asked it to perform codebase transforms in English, and it's worked!
E.g. "Replace all calls foo(..., true) with foo_immediate(...) define a foo_immediate function".
I'm still reading the diff and checking tests -- it's still AI after all.
I'd heard the conventional wisdom that UX research states that mice are more efficient than keyboards, but turns out there's virtually no research on this!
https://danluu.com/keyboard-v-mouse/