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Inside a window

Three acts, not one timer

A window runs warm up, deep work, wind down. Warming up lowers the bar to start, deep work is the heart of it, winding down catches what moved before you close the book. Deep work must run its full time and cannot be skipped to the end.

• Six presets shape the split: even, practice-heavy, long warm-up, all deep work, skip warm-up, skip wind-down.
• Deep work never drops below five minutes, whatever you drag.
• Each act carries its own line: what it is for, and one thing to do in it.