Surreal mutation & impossible physics (Seedance 2.0)#

Anti-physics storytelling: gravity tilts, rooms fold, materials swap mid-action, scale jokes land as clear visual punchlines.

Dependencies: WERYAI_API_KEY + Node.js 18+. This skill uses only SEEDANCE_2_0. When you run the CLI, scripts/video_gen.js must exist; WERYAI_VIDEO_API.md must exist under resources/ (supply both via publish or pre-use assembly). Full commands and JSON fields: see resources/WERYAI_VIDEO_API.md. No other Cursor skills required.

Prerequisites#

• WERYAI_API_KEY must be set before running video_gen.js.
• Node.js 18+; prefer public https image URLs. If the assembled scripts/video_gen.js accepts local paths, review/verify the script and explicitly consent before local read-and-upload to WeryAI.
• Model (caller / agent): The bundled video_gen.js requires a non-empty model in JSON—if model is missing or blank, the CLI exits with MISSING_PARAM (no default model). The script does not enforce this skill's allowed model in code: you must set "model":"SEEDANCE_2_0" for this package and show it in the confirmation table before submit—see WERYAI_VIDEO_API.md ( model row).
• Each wait run may consume credits; re-run creates new paid tasks.

Security, secrets, and API hosts#

• WERYAI_API_KEY: Treat as a secret. Only configure it if you trust this skill's source; it is listed in OpenClaw metadata as requires.env / primaryEnv so installers know it is mandatory at runtime (never commit it inside the skill package).
• API hosts (fixed in video_gen.js): Video tasks use https://api.weryai.com; the models list uses https://api-growth-agent.weryai.com. Child skills must not document or rely on URL environment-variable overrides—only WERYAI_API_KEY is read from the environment.
• Local image handling disclosure: Prefer public https image URLs. If the assembled scripts/video_gen.js supports local file paths, it may read a local image and upload it to WeryAI to obtain a public URL; require review / verification and explicit consent before using that path.
• Higher assurance: Run generation in a short-lived or isolated environment (separate account or container), and review scripts/video_gen.js (HTTPS submit + poll loop) before production use. Verify whether the runtime can read local image files and upload them to WeryAI, and obtain explicit consent before using that path.

Prompt expansion (mandatory)#

video_gen.js does not expand prompts. Before every wait --json, turn the user's short or vague brief into a full English production prompt that re-styles the described event into this skill's look.

When: User input is short, vague, or missing cinematic detail. Exception: They supply a finished long prompt within 2000 characters and ask you not to rewrite—still show the full text in the confirmation table.

Always add: shot size and angle; camera move; lighting and color grade aligned to this skill; subject action paced to duration; one clear payoff; platform framing ( 9:16 unless user chose another allowed ratio); if generate_audio is true, describe ambience / SFX in generic words (no copyrighted music references).

Length: Stay within prompt_length_limit 2000 for SEEDANCE_2_0; trim adjectives before losing the core transformation beat.

Confirmation: The pre-submit table must include the full expanded prompt.

Style transformation checklist#

• Rule breaks: melting clocks vibe, impossible stairs, duplicate reflections.
• Space warp: corridor stretch, sky on floor—one clear hero idea per clip.
• Materials: liquid metal, rubber stone—motivated by user beat.
• Scale play: giant hand, tiny city—readable silhouette.
• Motion payoff: expectation subversion in final third of timeline.
• Sound (if on): reversed whooshes, rubbery boings—sparse and odd.

Fits: Curiosity bait, contrast comedy, visual spectacle, pattern-interrupt ads.

### Example prompts below are richness targets only—always derive from the user's actual brief.

Workflow#

1. Confirm the request matches this skill (text-to-video and/or single image-to-video).
2. Collect the user's brief, optional image URL, and tier ( best / good / fast)—all map to SEEDANCE_2_0 with different duration defaults (see Recommended models).
3. Expand prompt (mandatory): Unless the user opted out with a finished long prompt, expand using ## Prompt expansion (mandatory). Do not submit only the user's minimal words.
4. Validate model is SEEDANCE_2_0 only; validate duration, aspect_ratio, resolution, generate_audio against the frozen tables.
5. Show the confirmation table with the full expanded prompt; wait for confirm or edits.
6. Run node scripts/video_gen.js wait --json '...'.
7. Parse stdout JSON; return videos URLs or explain errors.
8. When presenting playable URLs to the user, use Markdown inline links only (e.g. [Video](https://...)). Do not wrap user-facing links in code fences.

CLI reference#

sh

node scripts/video_gen.js wait --json '{"model":"SEEDANCE_2_0","prompt":"…","duration":10,"aspect_ratio":"9:16","resolution":"720p","generate_audio":true}'

Full reference: WERYAI_VIDEO_API.md.

Definition of done#

Done when the user gets at least one playable Video-style link, or a clear failure with next steps. Submitted prompt must be the expanded prompt unless the user explicitly opted out. Never use another model_key in this skill.

Boundaries (out of scope)#

• Do not use any model other than SEEDANCE_2_0 for this package.
• Do not link to weryai-model-capabilities.md or shared ../references/ paths; use resources/WERYAI_VIDEO_API.md for CLI/API details.
• Prefer public https for image when easy; OpenClaw / chat attachments are often a local path—if video_gen.js can read it, pass it as image and the script uploads first (use an absolute path if a relative path fails). Never embed the secret value of WERYAI_API_KEY in files.
• Do not invent API fields; do not send negative_prompt (not supported for this model).
• Do not wrap user-facing playable URLs in Markdown code fences.

Example prompts#

• Drinking coffee → cup becomes miniature swimming pool, diver splash gag, vertical
• Walking upstairs → steps melt into waterfall, seamless dream logic
• HTTPS sneaker → sole grows into slide, surreal playground

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Model and API constraints (frozen for this skill)#

Derived from node scripts/video_gen.js models alignment at authoring time; re-run models after platform upgrades. This skill is locked to SEEDANCE_2_0 only.

Text-to-video#

model_keydurationsaspect_ratiosresolutionsAudionegative_promptprompt limitSEEDANCE_2_05, 10, 159:16, 1:1, 16:9480p, 720pYesNo (do not send)2000

Image-to-video (single image)#

model_keydurationsaspect_ratiosresolutionsAudionegative_promptupload_image_limitSEEDANCE_2_05, 10, 159:16, 1:1, 16:9480p, 720pYesNo (do not send)3

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Recommended models#

Tiermodel_keyNotes⭐ Best (default)SEEDANCE_2_0Prefer duration 10 or 15, resolution 720p, generate_audio true for fullest mood👍 GoodSEEDANCE_2_0Balanced: duration 10, resolution 720p, audio per user⚡ FastSEEDANCE_2_0Snappy: duration 5, resolution 480p or 720p, audio optional

Tier only changes duration / resolution / audio defaults— never the model.

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Default parameters#

FieldValueModelSEEDANCE_2_0 (fixed)Aspect ratio9:16Duration10 (use 5 for punchy; 15 for slower ceremony)Resolution720p ( 480p allowed)Audiotrue unless user wants silent

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Scenario: Text-to-video style transform#

Flow

1. Capture the user's mundane event in one or two sentences.
2. Expand into English with the Style transformation checklist; keep identity generic unless user names a character.
3. Confirmation table → user confirm.
4. Execute:

sh

node scripts/video_gen.js wait --json '{"model":"SEEDANCE_2_0","prompt":"<expanded>","duration":10,"aspect_ratio":"9:16","resolution":"720p","generate_audio":true}'

1. Return [Video](url) links.

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Scenario: Image-to-video style transform#

Before use: Prefer a public https:// URL reachable from the internet. Local paths (e.g. OpenClaw attachment paths) work when the Node process can read them— video_gen.js uploads then submits; use absolute paths if needed. Do not use plain http:// remote URLs.

1. Plan how the still re-styles in motion (props, light, environment) without breaking likeness if the user requests preservation.
2. Expand prompt; add image to the confirmation table.
3. After confirm:

sh

node scripts/video_gen.js wait --json '{"model":"SEEDANCE_2_0","prompt":"<expanded>","image":"https://…","duration":10,"aspect_ratio":"9:16","resolution":"720p","generate_audio":true}'

1. Return [Video](url) links.

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Loop seam (optional)#

If the user asks for a seamless loop, append a short English trio at the end of the expanded prompt: seamless loop, perfect loop, ends where it begins—no separate API flag.

Generated for skill surreal-mutation-transform-video-gen-seedance2.0.