Regarding the control and detection of double kerning pairs in libraries

[shuki]

Is there a way that detects the existence of kerning pairs that appear twice and cause disruption and gaps between what is seen in the font manager and Adobe programming,
Many times I come across such problems while working and I would love to have control over it

[Erwin Denissen]

Do you mean you have kerning pairs in multiple pair positioning lookups?

There is no automated way to detect them. I agree it is better to have only one item, but shaping engines should not struggle with it.

[shuki]

Indeed, there are pairs that repeat themselves perhaps in different groups and it is possible that they also add to the disruption of the kerning, there should be an indication of a duplicate pair and it already appears in the ciphers

[Erwin Denissen]

You might get warnings when you recompile the lookup or the complete script in FEA code.

Let us know if that helps.