rea/tests/fixtures/native-macos/archive-xml-encoding/README.md

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Foundation XML archive encoding fixture

producer.swift creates an actual NSKeyedArchiver XML representation, then uses Foundation string encoding to produce BOM-marked UTF-16 little- and big-endian representations of the same XML graph. Foundation's PropertyListSerialization reads both representations successfully; plutil -lint also accepts all three files.

xcrun swiftc producer.swift -o writer
./writer archive.xml little-endian.plist big-endian.plist
plutil -lint archive.xml little-endian.plist big-endian.plist

Only the UTF-8 XML source capture is committed. The tests encode its same text as UTF-16 so no compiled binaries or binary fixtures are committed. This is format/filesystem verification; no archived classes are instantiated by REA.