A little while ago I published a tool I wrote for listing and extracting files from Lisa filesystems on DiskCopy 4.2 disk images, lisafs: https://github.com/eschaton/lisafs
And just now, I published a tool for dumping the contents of Lisa object files, which can hopefully grow into a more comprehensive RE tool, lisaobj: https://github.com/eschaton/lisaobj
Both are ANSI C99, both are under the MIT license, and (since we need to specify nowadays) I didn't use an LLM in the process of creating either, just the documentation on Bitsavers and the Lisa OS source code.
Ah, so this is why you wanted to figure out the packing algorithm!
Nice work; I bet this will prove to be a really useful tool!
Thanks! I'm hoping that this will help us towards, say, disassembling things like the Workshop shell so they can be hacked on to fix bugs, add features, etc.