The receipt earns the close
The product is the relief of ending a session after review. The receipt is the evidence trail that makes the decision inspectable.
Field notes
Designing a reviewed end
to the tab pile.
Short notes on browser research, closure, recovery, and where powerful AI should deliberately stop.
Unknown means keep
Model confidence is not a permission system. A short argument for deterministic restraint around destructive actions.
Restore is not time travel
A URL can reopen a page. It cannot promise your form, cart, call, upload, or authenticated application state will return.
The thesis in one page
Tabs are not the problem. Unfinished state is.
People keep tabs because browsers cannot tell the difference between evidence already used, a fact likely to change, an unresolved question, and an action that would be dangerous to lose.
A useful product does not shame the pile or file every page into another graveyard. It waits until the user is ready to stop carrying the session, creates a durable account of the work, surfaces detected exceptions, and lets the user review what should close.
That is why Tab Checkout is intentionally a checkout, not an always-on memory system. The trigger is explicit. The object is a receipt. The destructive action is last. And uncertainty preserves state instead of spending it.
Receipt first. Close second.
See the principle rendered as a receipt.
The deterministic synthetic fixture illustrates the expected plan: 43 tabs reviewed, 39 proposed closes, and four deliberate keeps.