Add references/output-format.md

Add output format reference

references/output-format.md

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+# Output format
+
+Use the smallest structure that still supports production.
+
+## Reference shortlist
+
+For each selected note include:
+
+- URL and creator
+- Platform
+- Visible publish date and engagement metrics, or `未显示`
+- Product/audience relevance
+- First-second hook and opening visual
+- Demonstration, proof, payoff, and CTA
+- What is reusable as a pattern
+- What must not be copied
+
+## Cross-reference findings
+
+Summarize:
+
+- Repeated customer problem or desire
+- Winning hook families
+- Typical reveal time and total duration
+- Proof devices and objection handling
+- Visual rhythm, text density, and sound role
+- Gaps that create an original opportunity
+- Platform-specific differences and the convention chosen for the destination platform
+
+## Original script
+
+State the concept, target viewer, objective, duration, aspect ratio, language, and audio mode. Then provide a shot table with:
+
+| Time | Visual/action | On-screen text | Audio/SFX | Purpose |
+|---|---|---|---|---|
+
+Finish with:
+
+- Cover text
+- Caption and CTA
+- 3–5 relevant hashtags when requested
+- Product assets required
+- Claims or details that still need verification
+- A short originality note explaining how the concept differs from its references