Cross-platform short-form

Take the source caption below and rewrite it for 6 platforms. Each platform's caption follows its native algorithm and audience expectation.

Source caption (write this once, optimized for TikTok):
"""
{{paste TikTok-style caption}}
"""

Video summary (so context isn't lost):
"""
{{1 sentence: what the video is about + the 1 key takeaway}}
"""

Output, in this order:

1. **TikTok** — exactly the source caption, lightly edited for hooks. 150 chars max.
2. **Instagram Reels** — 220 chars max. Slightly more polished tone. 1 to 3 hashtags at end.
3. **YouTube Shorts** — 100 chars (title) + 200 chars (description). Searchable phrasing matters here.
4. **X** — 220 chars. Lead with the hook. No hashtags.
5. **LinkedIn** — 600 chars. Conversational, professional, 1 line break per sentence. End with a single specific question.
6. **Threads** — 300 chars. Punchier than IG. No hashtags.

Constraints across all six:
- No "in this video", no "watch till the end".
- One concrete number, name, or example.
- No emojis unless the source caption uses them.
- No em dashes.