It's rather meta, but I've been really enjoying https://github.com/tonini/overseer.el. If you have a test suite for your elisp library, you probably use ert-runner to confirm your project works in a fresh Emacs instance.
overseer.el then allows you to run ert-runner tests from inside Emacs!
miniblog.
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Today I learnt about "bypass charging", a phone feature where it can run directly off the mains without using the battery at all. No battery charging, less heat, less battery wear. Nifty.
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I'm considering using WebP more: for example, my websites would load faster and browsers have supported it since 2020: https://caniuse.com/webp
That said, GitHub just added support in August 2025, so I suspect I'd still find use cases that don't work yet:
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Test code is total: we require it to always terminate or it's a failure! It also typically has 100% line and branch coverage.
I feel way less nervous about refactoring tests, you can always just run them.