Here's my answer: https://github.com/pure-data/pd-lib-builder/issues/81#issuecomment-2144041138

Hi, I was not sure if I had to open an issue in Pd or pd-lib-builder, and I ended up opening on the latter (see https://github.com/pure-data/pd-lib-builder/issues/81), but I am also raising it up here and asking what's going on. It seems CLASS_MAINSIGNALIN has changed, is that it? Why? 

thanks

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