Quit prompting me for text files. Make it so I can turn it off after it prompts.
See title for more information.

You can probably use the —nolangwarn. Check it in our docu. https://www.semanticmerge.com/documentation/main.shtml
Then, some version controls let you configure the tool per extension.
That’s not the case with Git.
Then —nolangwarn directly invokes the external tool you set to deal with text based merges
https://www.semanticmerge.com/documentation/main.shtml#Launchoptionsconfigurationfile
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Eddy commented
Note you can have different diff drivers depending on the type of files. Although a gitconfig feature, this is explained in the .gitattribute man page (search for 'cpp'). Not sure if the same is true for merge drivers and is undocumented or if support is simply missing.