{
  "date": "2026-10-15",
  "release": "1.66.0",
  "status": "Local CPU and native Chrome acceptance completed; deployment is checked separately.",
  "workflow": "Loaded file → waveform draft → deliberate BPM/beat-one/Track sync Apply → exact guarded Undo → absolute-phase film Review → three rendered and actually downloaded formats",
  "fixture": {
    "description": "Original controlled 160 BPM rhythm with first attack at 0.125 seconds",
    "wav": "16 s / 48 kHz / mono PCM",
    "mp3": "VBR conversion of the same original fixture",
    "window": "0–8 s and a later window; local silent decoding"
  },
  "native": {
    "browsers": [
      "Desktop Chrome",
      "Codex in-app Chromium"
    ],
    "adoption": {
      "bpm": 160,
      "beatOneSeconds": 0.125,
      "pulseSource": "track",
      "playing": false,
      "speakerMonitoring": false,
      "exactSavedSessionUndo": true
    },
    "guards": [
      "Auto scene rejects Apply",
      "A different File render soundtrack rejects old-file Track sync before Review",
      "Replacing WAV with MP3 resets alignment; MP3 waveform decodes successfully"
    ],
    "film": {
      "soundtrackStart": 0.3,
      "soundtrackEnd": 3.3,
      "fps": 30,
      "framesEach": 90,
      "formats": [
        {
          "ratio": "16:9",
          "width": 960,
          "height": 540,
          "bytes": 2129507
        },
        {
          "ratio": "9:16",
          "width": 540,
          "height": 960,
          "bytes": 2083063
        },
        {
          "ratio": "1:1",
          "width": 540,
          "height": 540,
          "bytes": 1863738
        }
      ],
      "codecs": "VP9 / Opus, decoded 48 kHz stereo",
      "motion": "Three actual decoded picture samples per target plus muted browser playback of the landscape film",
      "audioComparison": {
        "comparison": "First 0.5 s decoded mono vs selected WAV passage 0.3–0.8 s, 75% gain; integer lag 0–1500 samples searched",
        "correlation": 0.9978282394856653,
        "lagSamples": 0,
        "lagMs": 0,
        "boundary": "Codec/container alignment check, not a physical projector or universal AV latency measurement"
      }
    },
    "mobile": {
      "viewport": [
        320,
        760
      ],
      "dialogWidth": 306,
      "documentScrollWidth": 305,
      "applied": true,
      "undo": true,
      "visual": "Real reflow screenshots of top fields and bottom Apply/Undo, no horizontal overflow."
    }
  },
  "limits": [
    "One controlled rhythm on desktop Chrome, not a representative music-accuracy study or all-browser performance test.",
    "A constant manually placed grid does not detect downbeats, follow changing tempo, warp audio or correct physical speaker/projector latency.",
    "Cue-grid position and act boundaries remain separate; file alignment resets on file replacement, session load and reload.",
    "No physical projector, room hardware or live-DJ device path was tested.",
    "GSC/Bing data and IndexNow receipts do not prove indexing, ranking, AI citation or a release effect."
  ]
}