{
  "format": "sylpheed.timing/1",
  "keyframe_units_per_second": 60,
  "why": [
    "HANDOFF Q1. The disc says a keyframe is at `t=30`; it does not say what a",
    "`t` is. The unit was MEASURED off the running game, not decoded: a declared",
    "15-unit fade lands on round(255*k/15) for all seven of its samples with k",
    "stepping 2,4,6,8,10,12,14 on seven consecutive submitted frames -- so 2",
    "units per rendered frame -- and the idle title presents at 28.3-28.8 fps,",
    "a 30 Hz game, giving 60 units per second. A second line agrees: the",
    "transition quad is declared black for 12 units, and a capture measured the",
    "pure-black plateau at 0.17-0.23 s, where 12/60 = 0.20 s.",
    "",
    "Expressed as units-per-second rather than seconds-per-unit so the value is",
    "exact rather than a repeating decimal a reader has to recognise.",
    "",
    "DELETE THIS FILE when a field on the disc is found that states the unit.",
    "Nothing here is on the disc."
  ],
  "kind": "measured",
  "source": "/reborn docs/port/HANDOFF.md Q1, docs/re/ui-keyframe-time-unit.md",
  "ramp": "linear",
  "ramp_why": [
    "Also HANDOFF Q1, and part of the same measurement: the fade lands on the",
    "linear value at every one of the seven sampled frames, so there is no ease."
  ],
  "exit_ramp_seconds": 0.4,
  "exit_ramp_why": [
    "HANDOFF Q7 + the RE agent's 2026-08-29 answer. MEASURED, not on the disc.",
    "",
    "Every element of a screen ends on exactly ONE untimed keyframe, so there is",
    "exactly one unknown duration per screen -- the ramp INTO that final keyframe.",
    "This is that duration. ~0.4 s, which is 24 units at 60 units/s.",
    "",
    "The alternative readings were tested and refuted. It is not a black quad laid",
    "over a frozen screen: under that model a black rect scales every region by the",
    "same 1-alpha, so the button-region / background-region brightness RATIO would",
    "be constant through the fade. Measured on the RE agent's filmstrip it falls",
    "6.495 -> 5.574 -> 3.105 -> 2.125 -> 1.935, a 3.4x monotonic drop. The screen",
    "itself plays out: pteff00.prm ramps to opaque black while the button labels,",
    "ptmsg, pteff10 and pteff12 all ramp to transparent, and ptframe1/2 hold.",
    "",
    "REACH, quoted from the RE agent rather than smoothed over: the filmstrip is",
    "downsampled and the button region contains some background, so this pins the",
    "DIRECTION, not 0.4 s to +/-0.05 s, and it is one transition pair. Treat the",
    "number as approximate and the model as established."
  ],
  "exit_ramp_units": 24,
  "dwell_seconds": null,
  "dwell_why": [
    "NOT SET, and not needed. A screen's dwell is its OWN keyframe group: the",
    "publisher wordmark reaches its hold at t=235 (3.92 s) and the developer logos",
    "at t=190 (3.17 s), both read from the disc. Adding a hold on top of that would",
    "be inventing a number nobody measured, so the sequencer holds for zero extra",
    "time and the pacing you see is the disc's own.",
    "",
    "If a capture ever times the real boot, this is where that number goes."
  ]
}