> The question now is that I can't find anything about COERCE in the > documentation.
Yeah, COERCE definitely should be documented but just hasn't been yet. There's a raku/doc issue about needing to add it (https://github.com/Raku/doc/issues/3807) but unfortunately none of us has done so yet :( That issue does link to a several blog posts that explain the new coercion protocol – you might find those useful and you or anyone else might also be able to adapt them into a great doc PR. -codesections
