Welcome to the TOSA community.
When we started the work on TOSA, we did create a big spreadsheet with multiple frameworks and operator lists to base the work on. That led to the initial TOSA operator set. From there we iterated on the operator set while looking at more of the framework operators. As we started to converge on what we thought was reasonable, we wrote down the guiding principles of TOSA: TOSA specification operator selection principles. Those are the constraints we’ve imposed. There is always a bit of judgement involved when reasoning about operators against the principles, but as stated, they continue to guide the work.
Since the initial version, we continue to look at frameworks prioritized by the operators that are commonly in use in the frameworks.
The biggest gap we are aware of for TOSA is with regard to training. We plan to spend more time looking at training operators, which will likely require some new TOSA operators.