[codetrotter]

Ruffle plays compiled Flash swf files

The tool that the author made reads Flash fla files and exports data from that.

Swf files contain binary data. The ActionScript code has been compiled into bytecode. The vector data is probably also represented in binary format.

Fla files, as pointed out in the OP blog post, contain XML data.

It sounds like OP is doing something quite different from what Ruffle does.

Ruffle tries to be a player for swf files.

OP wanted to export data from Fla XML to other formats, so that he could build executable games.