End-to-end pipeline tying together the pieces from phases A\u2013C: - AC_WIN_W / AC_WIN_H env overrides for SDL_CreateWindow so the demo renders natively at 1280x800 instead of the 640x480 dev default. Falls back to INITIAL_WIN_* when unset (notepat.app still launches at its original size). - scripts/demo.sh ties everything together: 1. Generates a "good afternoon <handle>. enjoy <city>." greeting via /usr/bin/say (Samantha @ 165 wpm). 2. Runs ac-native with AC_BOOT_ANIM + AC_INJECT_SEQUENCE typing 'notepat<enter>', then an oom-pah-pah 3/4 waltz across four bars in C minor (Cm \u2192 Fm \u2192 Gm \u2192 Cm) using notepat's z (low bass), c/e/f/a/g/b (mid chord) keys. 12 notes, 500 ms/beat. 3. Frame-dumps during boot anim + main loop so the video is one contiguous 60 fps h264 stream. 4. Mixes the synth WAV tap + TTS AIFF with ffmpeg amix (TTS delayed 167 ms to line up with the boot-anim f==10 cue that drives the greeting on Linux), then encodes mkv. - Boot-animation prelude now also dumps frames when AC_FRAME_DUMP_DIR is set; the piece loop seeds its frame index from there so both halves of the run form one sequence. Output: ~/Desktop/ac-boot-shots/demo.mkv \u2014 ~14 s, 1280x800, 60 fps h264 + 48 kHz stereo aac. Override HANDLE / CITY / HOUR / OUT for other greetings; KEEP_STAGES=1 preserves /tmp/ac-demo-final for debugging. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>