Stop the preview app quitting on Xcode's launch arguments - #10
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Running the MacstifyPreview scheme quit before the window appeared. Xcode launches the app with NSUserDefaults-style arguments - Document Versions is on by default in the Run action, which adds `-NSDocumentRevisionsDebugMode YES` - and the parser threw on the first argument it did not recognise. Single-dash flags and the value after them are now skipped. A misspelt `--option` still fails loudly, which is the case worth catching. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Aug 9, 2026
Stop the preview app quitting on Xcode's launch arguments
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Running the
MacstifyPreviewscheme quit before the window appeared.Xcode launches the app with NSUserDefaults-style arguments — Document Versions is on by default in the Run action, which adds
-NSDocumentRevisionsDebugMode YES— and the parser threw on the first argument it didn't recognise:Single-dash flags and the value after them are now skipped. A misspelt
--optionstill fails loudly, which is the case actually worth catching.Verification
-NSDocumentRevisionsDebugMode YES -ApplePersistenceIgnoreState YES --snapshot …--optoinsunknown argument: --optoins, exit 1make lintandswiftformat --lintpass.🤖 Generated with Claude Code
https://claude.ai/code/session_01MVZKaTdW5LpcwGnwAV22ZV