It started at two in the afternoon. When you looked at the window it was dark, you had not eaten, there are three unread messages from someone worried — and the project moved further in those hours than in the previous two weeks.
It is the most contradictory ADHD experience: the same person who cannot hold focus through fifteen minutes of email disappears inside a task for six hours.
Why this is not a contradiction
Think of attention as a spotlight with two controls: where to point it, and when to switch it off. In ADHD both controls are hard — and that produces two symptoms that look like opposites.
When a task gives no quick payoff, pointing the spotlight at it is expensive, and it slides off toward any other stimulus. When a task pays out constantly — a game, code that compiles, a subject that fascinates — the spotlight sticks, and the problem becomes switching it off.
Add impaired time perception and the picture closes: inside hyperfocus, there is no internal clock to say that is enough.
What hyperfocus charges
It gets sold as a superpower, which is a convenient half-truth. What it costs:
- Your body. Eating, drinking, the bathroom, sleep — all postponed without you noticing.
- Other people. A missed commitment, an unanswered message, the person next to you feeling ignored.
- Target selection. Nothing guarantees the spotlight sticks to the important task. Six hours reorganising an icon library is not a deliverable.
- The comedown. Disproportionate exhaustion afterwards, with the rest of the day written off.
How to build the fence
The goal is not to eliminate hyperfocus — pointed at the right thing, it is genuinely productive. The goal is for it to happen inside limits you set before entering, while you still had a say.
Where this fits what I built
An alarm solves the easy half: marking the time. The hard half is insisting without becoming noise, carrying context ("you started this at 2 p.m., you meant to stop at 6") and recording where you stopped so the return is cheap.
That external-guardian role is what I wanted the ASB assistant to play.