Initial skill: tiktok-video-review with 14-frame extraction workflow

SKILL.md

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+---
+name: tiktok-video-review
+description: Download a TikTok video, extract evenly distributed frames (default 14), and inspect content quickly.
+---
+
+# tiktok-video-review
+
+Use this skill when someone wants you to actually look inside a TikTok video instead of only reading metadata.
+
+## Goal
+
+Get a fast visual understanding of a TikTok by extracting evenly distributed frames across the full video.
+
+Default assumption:
+- `14` frames across the entire video.
+
+## Required tools
+
+- `yt-dlp`
+- `ffprobe`
+- `ffmpeg`
+
+If missing, install before proceeding.
+
+## Workflow
+
+1. Download the TikTok URL to a local mp4.
+2. Read duration with `ffprobe`.
+3. Extract `14` evenly spaced frames using the helper script.
+4. View the extracted frames and summarize what happens in the video.
+
+## Commands
+
+```bash
+# 1) Download
+yt-dlp -o /tmp/tiktok_review.mp4 "<tiktok-url>"
+
+# 2) Extract 14 frames across duration
+skills/tiktok-video-review/scripts/extract-frames.sh \
+  --input /tmp/tiktok_review.mp4 \
+  --outdir /tmp/tiktok_review_frames \
+  --count 14
+```
+
+## Notes
+
+- Keep frame extraction uniform across the timeline, not clustered at the start.
+- If the video is very short, still aim for the requested count and accept near-duplicate moments.
+- Always state clearly that the summary is based on sampled frames, not full per-frame playback.