**asc** is a CLI tool for automating App Store Connect tasks including TestFlight distribution, builds, submissions, code signing, screenshots, and CI/CD for iOS, macOS, tvOS, and visionOS apps.

It offers over 80 command groups covering the full API, installs via Homebrew or script, and authenticates with API keys. Features include managing metadata, Xcode Cloud workflows, signing, and AI agent skills for end-to-end publishing.