I like the idea of TAP, but one annoyance I found is that most tooling expects the total number of tests to be output up-front, so we can't just "run everything

I like the idea of TAP, but one annoyance I found is that most tooling expects the total number of tests to be output up-front, so we can't just "run everything", e.g. looping through all shell scripts in a test/ folder, or just writing a dumb, top-to-bottom script that outputs pass/fail messages. Even though it's small, the extra structure and effort needed to count tests up-front is basically the same as switching to a "proper" test framework (most of which don't output TAP :( )