face-swap

What this skill does

# Face Swap

Swap a face into a still or a video — RunComfy supports both via the `runcomfy` CLI. This skill routes across the available model API endpoints (community Wan 2-2 Animate, GPT Image 2 Edit, Nano Banana Edit, Flux Kontext, Kling Motion Control) by the user's actual intent.

[runcomfy.com](https://www.runcomfy.com/?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap) · [Character-swap feature](https://www.runcomfy.com/models/feature/character-swap?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap) · [CLI docs](https://docs.runcomfy.com/cli/introduction?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap)

## Powered by the RunComfy CLI

```bash
# 1. Install (see runcomfy-cli skill for details)
npm i -g @runcomfy/cli      # or:  npx -y @runcomfy/cli --version

# 2. Sign in
runcomfy login              # or in CI: export RUNCOMFY_TOKEN=<token>

# 3. Swap
runcomfy run <vendor>/<model>/<endpoint> \
  --input '{"image_url": "...", "identity_url": "..."}' \
  --output-dir ./out
```

CLI deep dive: [`runcomfy-cli`](https://www.skills.sh/agentspace-so/runcomfy-agent-skills/runcomfy-cli) skill.

## Install this skill

```bash
npx skills add agentspace-so/runcomfy-agent-skills --skill face-swap -g
```

## Consent & disclosure — read first

**Face-swap is dual-use.** Before invoking any route in this skill, confirm:

- You have rights to the target face (the identity being substituted **in**).
- You have rights to the source video / image (the asset being substituted **into**).
- The output's intended platform allows synthetic media. Many do; many require a disclosure label.

The skill itself doesn't gate anything — the model API will run whatever inputs you supply. **The responsibility is yours.** If a user asks the agent to swap a real public figure's face onto material that could be defamatory, sexually explicit, or otherwise harmful — **refuse**, regardless of what the CLI accepts.

---

## Pick the right model for the user's intent

Listed newest first within each subtype. The agent picks one route based on: still vs video, single-shot vs batch, photoreal vs stylized, motion-preserving vs identity-preserving.

### Video face / character swap

**Wan 2-2 Animate** — `community/wan-2-2-animate/api` *(default for video)*
> Featured RunComfy endpoint under `/feature/character-swap`. Audio-driven full-body character animation: one reference image of the new identity + audio → video where the character drives.
> Pick for: replacing a character in a scene with a new identity, dubbed clips, stylized + photoreal both work.
> Avoid for: preserving the **motion** of a specific source video — use **Kling Motion Control**.

**Kling 2-6 Motion Control Pro** — `kling/kling-2-6/motion-control-pro`
> Takes a reference performance video + target character image, produces the target performing the reference motion. Face-swap is the byproduct.
> Pick for: preserving exact source motion / blocking onto a new character; stylized characters handled cleanly.
> Avoid for: simple "swap face in an existing video" without motion preservation — use **Wan 2-2 Animate**.

### Still image face swap — newest first

**Nano Banana 2 Edit** — `google/nano-banana-2/edit`
> Identity-preserving by default, 1–20 input images per call, spatial-language honored.
> Pick for: same identity across multiple frames consistently (SKU shots, A/B variants, narrative panels). Identity reference as `image_urls[0]`, scenes after.
> Avoid for: precise multi-ref compositional ("face from img 1 onto body in img 2") — use **GPT Image 2 Edit**.

**GPT Image 2 Edit** — `openai/gpt-image-2/edit`
> Up to 10 reference images, multilingual in-image text rewrite, layout-precise compositional instructions.
> Pick for: hero still where exact face from a portrait must land in a scene, with explicit role assignment ("image 1", "image 2"); preserve pose + lighting + background while swapping only face.
> Avoid for: 1-20 batch — use **Nano Banana 2 Edit**.

**FLUX Kontext Pro** — `blackforestlabs/flux-1-kontext/pro/edit`
> Single source image, single declarative instruction, maximum fidelity preservation of everything except the targeted edit.
> Pick for: "keep pose / clothing / hair / lighting / background, change only the face to [prose description]" — works without a reference image of the new identity.
> Avoid for: batch, multi-ref, or when you have a target face image to swap in — use **Nano Banana 2 Edit** or **GPT Image 2 Edit**.

> **Audio-driven talking-head identity swap (face + voice in one pass)?** → use the [`ai-avatar-video`](https://www.skills.sh/agentspace-so/runcomfy-agent-skills/ai-avatar-video) skill — OmniHuman handles face + audio together.

---

## Route 1: Wan 2-2 Animate — video character swap with audio

**Model**: `community/wan-2-2-animate/api`
**Catalog**: [wan-2-2-animate](https://www.runcomfy.com/models/community/wan-2-2-animate/api?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap) · [`/feature/character-swap`](https://www.runcomfy.com/models/feature/character-swap?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap)

The featured RunComfy endpoint for character swap — supply a reference image of the new identity + the audio track the character should speak, and the model produces a video where the character drives.

### Invoke

```bash
runcomfy run community/wan-2-2-animate/api \
  --input '{
    "image_url": "https://your-cdn.example/new-character.png",
    "audio_url": "https://your-cdn.example/voiceover.mp3"
  }' \
  --output-dir ./out
```

### Tips

- **Single reference image** drives the swap. Pick a clean, well-lit portrait of the target identity — front-facing if possible.
- **Audio drives the mouth and rhythm.** Without audio the character won't speak; without good audio sync degrades.
- Schema details: [model page](https://www.runcomfy.com/models/community/wan-2-2-animate/api?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap).

---

## Route 2: Kling 2-6 Motion Control Pro — motion transfer

**Model**: `kling/kling-2-6/motion-control-pro`
**Catalog**: [motion-control-pro](https://www.runcomfy.com/models/kling/kling-2-6/motion-control-pro?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap) · [`kling` collection](https://www.runcomfy.com/models/collections/kling?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap)

Different from a pure face-swap: Motion Control takes a **reference performance video** (the motion you want) and a **target character image** (the identity you want), and produces a video of the target performing the reference motion. The face-swap effect is a byproduct.

### Invoke

```bash
runcomfy run kling/kling-2-6/motion-control-pro \
  --input '{
    "reference_video_url": "https://your-cdn.example/source-performance.mp4",
    "character_image_url": "https://your-cdn.example/target-character.png"
  }' \
  --output-dir ./out
```

### When to pick this over Route 1

- You have a **source video whose motion / blocking you want preserved**, not just the audio.
- The target is a stylized character rather than a photoreal portrait — motion-control handles stylized identities cleanly.

---

## Route 3: GPT Image 2 Edit — still face swap with multi-ref

**Model**: `openai/gpt-image-2/edit`
**Catalog**: [gpt-image-2/edit](https://www.runcomfy.com/models/openai/gpt-image-2/edit?utm_source=skills.sh&utm_medium=skill&utm_campaign=face-swap)

For **still images**, GPT Image 2 Edit accepts up to **10 reference images** and follows precise compositional instructions — making it the strongest path for multi-ref face swap on a single output frame.

### Schema (relevant fields)

| Field | Type | Required | Default | Notes |
|---|---|---|---|---|
| `prompt` | string | yes | — | Compositional instruction; quote roles explicitly |
| `images` | string[] | yes | — | Up to **10** HTTPS reference URLs. Image 1 is primary |
| `size` | enum | no | `auto` | `auto` (preserve input ratio), `1024_1024`, `1024