- playback.zig: sentence queue + playback thread — agent reply chunks are
split on sentence boundaries and each sentence is synthesized+played as it
completes, so voice starts after the first sentence, not after the reply
- melo_server.py v2: WAV written to /dev/shm, raw s16le PCM + sample rate
streamed over stdout (WAV n rate header + bytes), file deleted immediately;
melo stdout chatter rerouted to stderr to keep the protocol clean
- melo.zig: speakRaw returns in-memory PCM; pw-play fed via stdin pipe
(no on-disk TTS files at all)
- whisper: --language auto
- fix: double-close of pw-play stdin panicked Threaded Io in debug
- fix: quit-path frees for transcript cache, bubble lists, sentence queue,
reply buffer (debug allocator leak panic)
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