“I’ll work on setting up a dev environment on my Mac.”

This has an:

1. Open target, and
2. Open timeframe

And it kills me. I end up in a rabbit hole of one thing after another, feeling frustrated because I don’t see an end, and losing track of time.

So my conclusion is that tasks cannot be double-open. Either I set a target—*“Install neovim”—, or a timeframe—“set up the work environment for 20 minutes”*.