Going bottom-up on TB2 isn't getting me anywhere, so let's try top-down.
Get enough working to write a basic ok() test in TAP.
Got enough to make t/simple.t work. ok() and a plan. There's no test names, failure
diagnostics, plan checks or any frills. Stubbed out everything that broke.
Test names are in.
Failure diagnostics are in. That leaves plan enforcement which is pretty general. I'm going to call this good and open another ticket for the plan.