seedance-v2

Q: How do I install seedance-v2?

Run npx skills add https://github.com/prime-skills/runcomfy-agent-skills --skill seedance-v2 in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/seedance-v2/ (personal) or .claude/skills/seedance-v2/ (project).

by prime-skillsMedia & Creative

Generate cinematic short-form video with ByteDance Seedance 2.0 Pro on RunComfy. Documents Seedance 2.0 Pro's strengths (multi-modal references — up to 9 images, 3 videos, 3 audio — synchronized in-pass audio with natural lip-sync, cinematic motion refinement), the 4–15s duration schema, and when to route to HappyHorse 1.0 / Wan 2.7 / Kling instead. Calls runcomfy run bytedance/seedance-v2/pro through the local RunComfy CLI. Triggers on "seedance", "seedance 2", "seedance v2", "seedance pro", "bytedance video", or any explicit ask to generate video with this model.

Installs: 436.7K
Last 24h: +526
Trending rank: #648
Security: Pass

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/prime-skills/runcomfy-agent-skills --skill seedance-v2

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads seedance-v2 automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

Security audits

Independent scans of the skill's instructions and bundled files.

Gen Agent Trust Hub PassSAFE ·This skill provides an interface to the Seedance 2.0 Pro video generation model via the RunComfy CLI. It involves installing a global npm package, managing API credentials using standard practices, and executing local shell commands. It correctly identifies the risk of indirect prompt injection through multi-modal inputs.

Socket PassNo alerts

Snyk PassLOW ·Risk: LOW · No issues

SKILL.md

The instructions your agent reads when the skill is triggered.

Seedance 2.0 Pro — Pro Pack on RunComfy

runcomfy.com · Seedance 2.0 Pro · GitHub

ByteDance Seedance 2.0 Pro — multimodal cinematic video generator with native lip-synced audio — hosted on the RunComfy Model API.

npx skills add agentspace-so/runcomfy-skills --skill seedance-v2 -g

When to pick this model (vs siblings)

Seedance 2.0 Pro's distinct strength is multi-modal cinematic short-form: combine character images + scene videos + reference audio into one coherent shot. Pick it when fidelity to a reference identity / scene matters and you want native lip-sync.

You want	Use
Lip-synced spokesperson / dialogue ad	Seedance 2.0 Pro
Multi-modal references (image + video + audio)	Seedance 2.0 Pro
Brand-consistent multi-language narrative	Seedance 2.0 Pro
Currently-#1 blind-vote video quality	HappyHorse 1.0
Audio-driven lip-sync from your own track	Wan 2.7 (`audio_url`)
Motion editing on existing footage	Kling Video O1
Ultra-fast iteration	LTX 2

If the user said "Seedance" / "Seedance 2" / "ByteDance video" explicitly, route here regardless.

Prerequisites

RunComfy CLI — npm i -g @runcomfy/cli
RunComfy account — runcomfy login opens a browser device-code flow.
CI / containers — set RUNCOMFY_TOKEN=<token> instead of runcomfy login.

Endpoints + input schema

`bytedance/seedance-v2/pro`

Field	Type	Required	Default	Notes
`prompt`	string	yes	—	CN ≤ 500 chars OR EN ≤ 1000 words.
`image_url`	array	no	`[]`	0–9 references (JPEG/PNG/WebP/BMP/TIFF/GIF).
`video_url`	array	no	`[]`	0–3 clips (MP4/MOV), 2–15s each.
`audio_url`	array	no	`[]`	0–3 audio refs (WAV/MP3), 2–15s, < 15MB each.
`aspect_ratio`	enum	no	`adaptive`	`adaptive`, `16:9`, `9:16`, `4:3`, `3:4`, `1:1`, `21:9`.
`duration`	int	no	5	4–15 (whole seconds).
`resolution`	enum	no	`720p`	`480p` or `720p`.
`generate_audio`	bool	no	true	In-pass synchronized speech / SFX / music.
`seed`	int	no	—	Reproducibility.

How to invoke

Default (text only, 5s, 720p with audio):

runcomfy run bytedance/seedance-v2/pro \
  --input '{"prompt": "<user prompt>"}' \
  --output-dir <absolute/path>

Lip-synced ad with character reference (image-stable, text-evolves):

runcomfy run bytedance/seedance-v2/pro \
  --input '{
    "prompt": "Medium close-up. The woman explains today'\''s special in a warm friendly tone, slow push-in, soft window light, gentle cafe ambience.",
    "image_url": ["https://.../barista-headshot.jpg"],
    "duration": 8,
    "aspect_ratio": "9:16"
  }' \
  --output-dir <absolute/path>

Multi-modal (image + video + audio refs):

runcomfy run bytedance/seedance-v2/pro \
  --input '{
    "prompt": "Subject from image 1 walks through the café from video 1, voice tone matches audio 1.",
    "image_url": ["https://.../subject.jpg"],
    "video_url": ["https://.../cafe-locked-shot.mp4"],
    "audio_url": ["https://.../voice-ref.mp3"]
  }' \
  --output-dir <absolute/path>

The CLI submits, polls, fetches the result, downloads *.runcomfy.net/*.runcomfy.com URLs into --output-dir.

Prompting — what actually works

Image vs text division. This is the single most important rule. Stable identity (face, costume, brand mark, logo) → put in image_url. Evolving narrative (action, mood, lighting, camera) → put in prompt. Trying to verbally describe a face in detail wastes tokens and produces drift.

Camera + motion in plain language. "Medium close-up", "slow push-in", "handheld follow", "locked-off wide" all work as directives. Combine: "Medium close-up. Slow push-in over 3 seconds. Handheld, slight breathing motion."

Audio direction with generate_audio: true — say the tone: "warm friendly conversational", "calm instructional", "crisp newsroom delivery". For ambient: "gentle cafe chatter, distant traffic, no foreground music".

Reference media specs — videos must be 2–15s; audio must be ≤15MB and 2–15s. Out-of-range files reject. Match aspect ratio of refs to your output to avoid crops.

Anti-patterns:

Mixing radically different aesthetic refs (watercolor + photoreal) → confuses.
Conflicting style cues in prompt → simplify by removing contradictions.
Trying to describe stable identity verbally → use image_url instead.
Asking for >15s clips → 422; segment into multiple calls.

Where it shines

Use case	Why Seedance 2.0 Pro
Spokesperson / dialogue ads	Native in-pass lip-sync, no separate TTS step
Brand-consistent multi-language narratives	Image refs hold identity; text drives translation
Cinematic short-form film previs	Camera-shot grammar + multi-modal refs
Ad creatives with reference music / VO tone	Audio refs guide voice / mood without locking lip-sync
Reproducible variant testing	Seed control + fixed schema

Sample prompts (verified to produce strong results)

Default playground example:

Golden hour on a quiet cafe terrace: a barista wipes the counter, then
looks up and explains today's special in a friendly tone, natural
lip-sync. Medium close-up, slow push-in; warm side light, soft bokeh
through glass, gentle cafe ambience and subtle film grain.

Multi-modal lip-sync (text + image):

Same person as image 1 in a softly-lit recording booth, leaning into
the mic, says: "We just shipped the biggest update of the year."
Calm conversational tone. Medium close-up, locked tripod, shallow DOF,
warm key light from camera-left.

Limitations

Duration 4–15s — no longer clips on this endpoint.
Resolution ceiling 720p on the playground variant.
Reference media specs — videos / audio must be 2–15s; audio < 15MB.
Lip-sync quality — depends on prompt clarity; not guaranteed perfect under all conditions.
No @-syntax for character binding — relies on image refs + prompt alignment.

Exit codes

code	meaning
0	success
64	bad CLI args
65	bad input JSON / schema mismatch
69	upstream 5xx
75	retryable: timeout / 429
77	not signed in or token rejected

Full reference: docs.runcomfy.com/cli/troubleshooting.

How it works

The skill invokes runcomfy run bytedance/seedance-v2/pro with a JSON body matching the schema. The CLI POSTs to https://model-api.runcomfy.net/v1/models/bytedance/seedance-v2/pro, polls the request, fetches the result, and downloads any .runcomfy.net/.runcomfy.com URL into --output-dir. Ctrl-C cancels the remote request before exit.

Security & Privacy

Token storage: runcomfy login writes the API token to ~/.config/runcomfy/token.json with mode 0600 (owner-only read/write). Set RUNCOMFY_TOKEN env var to bypass the file entirely in CI / containers.
Input boundary: the user prompt is passed as a JSON string to the CLI via --input. The CLI does NOT shell-expand the prompt; it transmits the JSON body directly to the Model API over HTTPS. No shell injection surface from prompt content.
Third-party content: image / mask / video URLs you pass are fetched by the RunComfy model server, not by the CLI on your machine. Treat external URLs as untrusted; image-based prompt injection is a known risk for any image-edit / video-edit model.
Outbound endpoints: only model-api.runcomfy.net (request submission) and *.runcomfy.net / *.runcomfy.com (download whitelist for generated outputs). No telemetry, no callbacks.
Generated-file size cap: the CLI aborts any single download > 2 GiB to prevent disk-fill from a malicious or runaway model output.

FAQ

What does the seedance-v2 skill do?

How do I install seedance-v2?

Run npx skills add https://github.com/prime-skills/runcomfy-agent-skills --skill seedance-v2 in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/seedance-v2/ (personal) or .claude/skills/seedance-v2/ (project).

Which AI agents can use seedance-v2?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is seedance-v2 safe to install?

Security partners have reviewed it: Gen Agent Trust Hub passed; Socket passed; Snyk passed. As with any skill, read the SKILL.md and bundled scripts before installing.

Who maintains seedance-v2?

It is published by prime-skills in prime-skills/runcomfy-agent-skills. It has 436,742 recorded installs.