video-color-gradelisted

# Video Color Grade (assess → correct → looks → choose → LUT + apply) Write the grade from scratch as code, generate several distinct **named looks** on the real footage, select one through explicit human choice or delegated agent judgment, then bake a portable `.cube` LUT and apply it to the full clip. No preset packs. **Core idea — correct, then style.** Every look is `corrective base + creative layer`: - **corrective base** makes the footage *honest* — for flat LOG/HLG it's the log→Rec.709 conversion; for already-Rec.709 footage it's WB neutralize + exposure + mild contrast. Every look shares this base, so "neutral" stays meaningful and looks differ by *intent*. - **creative layer** is the look stacked on top (warm / cool / teal-orange / punchy / faded…). **Skin is the quality bar.** On people — especially darker skin — `teal_orange` and `cool_desat` routinely throw a green/grey cast. Judge every look on faces first; keep midtone warmth, push the tint into shadows/highlights/background, prefer `vibrance` over raw `saturation`. Don't push the white balance all the way to neutral or skin goes lifeless. Requirements: `ffmpeg`/`ffprobe` on PATH, Python with `numpy` + `Pillow`. ## Contract - Every look = `base + creative layer`; the base is shared by all looks. - All looks render on the **same** representative frame (a fair, controlled comparison), labeled, at full resolution. - The full apply uses **`-c:a copy`** (audio never re-encoded → A/V sync identical) and ke