You test the path you designed. These are the edge cases, state transitions and race conditions that only show up when someone does the wrong thing at the wrong frame. They are the ones that reach your Steam reviews instead of your issue tracker.
76 scenarios across seven systems. Each one tells you the symptom, how to reproduce it, and the likely cause in your code. An ordinary bug report says what broke. These also say where to look. Tick what passes, mark what breaks, then export the failures straight into Jira, Trello or Notion.
Free, with nothing to sign up for. Progress is saved in this browser: no account, no server, and nothing leaves your machine.
The list grows as we hit new things worth writing down. One email when scenarios land, nothing else.
Tell us what you are building while you are here. If you are chasing something that will not reproduce, describe what you are seeing. We have probably met it before, and we are glad to help indie devs where we can. Fair warning: this is two people doing it around day jobs, so a reply comes on a free evening rather than the same day. We do read everything.