I am _extremely_ impressed that bison-mode.el (last modified 1998) still works in modern Emacs. Now to package and slap on MELPA...
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Today I learnt that Emacs 28 shipped a context-menu-mode! https://oylenshpeegul.gitlab.io/blog/posts/20230129/
This seems quintessentially Emacs: deeply hackable, but building UI features in an order very different to the mainstream.
Claude asked me a question today: was I looking for an Emacs plugin (because I was talking about elisp) or a Rust program (because I have configured Rust preferences)?
I'm really impressed, it's rare to see LLMs ask follow-up questions.
(I wanted Emacs in this case.)
Shower thought: using a tool like cargo-semver, could you build a package registry where the uploader never chooses the version number?
E.g. your last release was 5.2025-09-13 and you've just changed a type, so today's release is 6.2025-11-05.