Ungated demonstration

See what a retry should decide.

Interactive simulation of Once’s documented state decisions. No account or checkout required.

INTERACTIVE SIMULATION

Ready

No account. No checkout. No external writes.

Without protection · blind retry

  1. The action commits; acknowledgement is lost.
  2. A blind retry can create a second ticket.
—Simulated effects for this intent

With Once · protected boundary

  1. Known success can be replayed.
  2. Unknown outcome blocks another dispatch.
—Simulated effects for this intent
NOT STARTED

Use the controls to explore confirmed replay, changed-input conflict and uncertain outcomes.

This browser simulation illustrates Once’s documented behavior. It does not run the SDK, persist execution state or prove external-provider durability. Inspect reproducible evidence or verify the installed SDK.

Protect your first action