What problem does it solve? Verifying that a native macOS app compiles normally requires opening Xcode and manually running builds, which interrupts CLI-driven development workflows. This Skill compiles any Xcode project or workspace from the terminal, surfaces build errors, and helps fix them. ## Core Features & Use Cases - Project Discovery: Locate .xcodeproj or .xcworkspace files and list available schemes with xcodebuild -list. - CLI Builds: Run xcodebuild with the correct scheme, configuration, and macOS destination, filtering output to show BUILD SUCCEEDED, BUILD FAILED, and error lines. - Error Diagnosis: Interpret common failures such as missing SPM modules, signing identity errors, wrong DEVELOPER_DIR, and unknown schemes, then re-run the build after fixes. - Use Case: After editing Swift source files, ask the agent to verify the project compiles; it finds the workspace, builds the Debug configuration, reports errors with file and line references, and confirms the fix with a rebuild. ## Quick Start Build my macOS app with xcodebuild and tell me whether it compiles, fixing any errors you find.
