If you've ever had App Store Connect reject your screenshots for being the wrong size or having alpha channels, this is the workflow you wish you'd known earlier. It wraps the asc CLI and macOS sips to resize, validate, and strip transparency from screenshots before upload. The smart part is it queries asc for current accepted dimensions instead of relying on a hardcoded table, since Apple changes requirements. Includes a Python snippet to fix those invisible Unicode spaces in filenames that make batch commands fail silently. The validation step catches issues locally before you waste time uploading, and the guardrails around aspect ratio and color space are honest about the tradeoffs.
npx skills add https://github.com/rudrankriyam/asc-skills --skill asc-screenshot-resize