Wikipedia:Articles for deletion/.sch (file extension)
as per. This is not any notable file-extension. People in the software industry can make custom file-extensions according to their needs. This seems one of these
— User:KartikeyaS343, 15:07, 15 October 2019 (UTC)
Stance: delete
Cited policy: WP:INDISCRIMINATE (Wikipedia:What Wikipedia is not)