- speakWithReference now validates the response IS audio via the same audioResultMIME sniff the sfx/enhance surfaces use — a 2xx JSON soft error or HTML proxy page was previously wrapped up as audio/wav bytes. - audioResultMIME moves to audio.go (next to speechMIME; it was defined in sfx.go but shared by enhance/clone) and learns the Ogg container normalization (application/ogg -> audio/ogg). - Stems zip unpack gains entry-count (16) and total-decompressed (1GB) caps on top of the existing per-entry cap — the per-entry bound alone still let a many-entry bomb multiply up. - sanitizeFilename drops NUL and both path separators too, so upload metadata can never smuggle directory structure to a file-writing shim. - New maxAudioResponseBytes (256MB) for bodies that ARE one audio clip (clone, enhance, sfx): a long WAV legitimately passes the 64MB JSON cap. - speakWithReference local renamed path -> upPath (naming parity with stems/enhance). Co-Authored-By: Claude Fable 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01WWCQcYStWXBYUy5sZWnbLT