This project is aimed to provide precise JSON schema files for static analysis and validation of Monika After Story spritepack JSON files without a need to test them by launching the mod.
Currently, all schema files were tested against official spritepack JSON files. Schema files work fine with examples shown on Monika After Story wiki page.
For more details, see action runs and test/ directory with test scripts.
Pick one of the available schema files (ACS (Regular), ACS (Split), Clothes, Hair), and feed its content to any JSON schema validator along with your spritepack JSON file.