It was there on the theory that it cost nothing and let the folder double as a
plain music folder. But a web mix is a folder you upload, and a stray playlist
file next to index.html is one more thing to explain to whoever receives it.
plan.m3u_name is now "" for WEB, so the plan doesn't name a file it won't
write, and index.html is simply the last thing written — which is what the
manifest-last invariant always meant for that branch. Folder exports keep
their m3u unchanged.
Claude-Session: https://claude.ai/code/session_01JBSM2bFC6UToiEg8BE4dqj
trav
ce8b0f26d9