watermarklisted

# watermark Persistent channel branding. "@C0BALT_CUT" in Impact at ~2% of frame height, Platinum white with the `0` in Sapphire Glow (brand/BRAND.md palette), thin black stroke, semi-transparent (alpha ≈200) so it reads without competing with captions. Same renderer pattern as `source-credit` (PIL PNG, ffmpeg overlay) because the local ffmpeg has no libass/drawtext. ## Invoke ``` .claude/skills/watermark/watermark.sh <input> <out> ``` - `input`: video to overlay onto (any aspect ratio; designed for 1080x1920) - `out`: output mp4 ## Output mp4, same dimensions and duration as the input, video re-encoded, audio stream-copied. Cache: skip rebuild when `out` is newer than `input`. Prints the output path to stdout. ## Geometry Mark is bottom-anchored at y = 97.5% of frame height, centered horizontally — for a 1080x1920 short the text baseline sits around y=1830. Captions live in the lower third (≈y=1344) and the source credit is a top chyron (y≈77), so the mark collides with neither. The CTA overlay (last ~4s) composites AFTER this skill in the chain, so it covers the mark briefly — intended, the CTA is the louder ask.