Custom error class patterns for consistent error handling across repositories
$npx -y skills add casper-studios/casper-marketplace --skill errorsInstalls into the current project.
Run `npx skills use "https://github.com/casper-studios/casper-marketplace" --skill "casper-studios/casper-marketplace/errors"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/casper-studios/casper-marketplace" that are relevant to the current task. Run `npx skills add "https://github.com/casper-studios/casper-marketplace"` and select the relevant skills, then follow their instructions.