Seedance 2 Prompt Engineering Skill

Seedance 2.0 JiMeng Skill (OpenClaw / ClawHub)

Purpose

Create high-control English prompts for Seedance 2.0 and Seedance 2.0 Fast using multimodal references (image/video/audio/text).

This skill is for:

• Prompt design from rough idea to production-ready prompt
• Mode choice: First/Last Frame vs All-Reference
• @asset mapping (what each image/video/audio controls)
• 4-15s duration planning and timeline beats
• Video extension / continuation prompts
• Character replacement and directed editing prompts
• Camera-language replication from reference videos

Core Rules

1. Always declare mode first.
2. Always include an explicit Assets Mapping section.
3. Use timecoded beats with one major action per segment.
4. Keep prompts concise and controllable (avoid vague poetic-only wording).
5. Add negative constraints when user needs clean output.

Platform Limits (Seedance 2.0)

• Mixed inputs total (image+video+audio): max 12 files
• Images: jpeg/png/webp/bmp/tiff/gif, max 9, each < 30MB
• Videos: mp4/mov, max 3, total duration 2-15s, total < 50MB
• Audio: mp3/wav, max 3, total <= 15s, total < 15MB
• Generation duration: 4-15s
• Realistic human face references may be blocked by platform compliance

Output Format (use by default)

1. Mode
2. Assets Mapping
3. Final Prompt
4. Negative Constraints
5. Generation Settings

Example skeleton:

Mode: All-Reference
Assets Mapping:
- @image1: first frame / identity anchor
- @video1: camera language + motion rhythm
- @audio1: optional soundtrack pacing

Final Prompt:
[ratio], [duration], [style].
0-3s: [action + camera].
3-7s: [action + transition].
7-10s: [reveal/climax + end frame].
Preserve identity and scene continuity. Use physically plausible motion and coherent lighting.

Negative Constraints:
no watermark, no logo, no subtitles, no on-screen text.

Generation Settings:
Duration: 10s
Aspect Ratio: 9:16

Special Cases

A) Extend Video

Explicitly write: Extend @video1 by Xs. Use generation duration equal to the newly added segment, not the full final length.

B) Replace Character

Bind base motion/camera to @video1, bind replacement identity to @image1, and request strict choreography/timing preservation.

C) Beat Sync

Use @video/@audio rhythm references and lock beats by time range.

Files in this skill

• SKILL.md — main skill behavior
• SKILL.sh — quick local test helper
• scripts/setup_seedance_prompt_workspace.sh — scaffold helper files
• references/recipes.md — ready-to-use prompt recipes
• references/modes-and-recipes.md — mode and control notes