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docs(image-generation): add MiniMax to docs and skill

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Updates docs/image-generation.md and skills/image-generation/SKILL.md to
include MiniMax configuration examples, supported aspect ratios, and
troubleshooting references. Also updates the supported provider list to
include minimax alongside openrouter, aihubmix, and gemini.
This commit is contained in:
chengyongru 2026-05-18 17:32:15 +08:00
parent 7aa5b9b17b
commit b518cd5850
2 changed files with 44 additions and 69 deletions
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46
docs/image-generation.md
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@ -48,6 +48,26 @@ AIHubMix example:
}
```
MiniMax example:
```json
{
"providers": {
"minimax": {
"apiKey": "${MINIMAX_API_KEY}"
}
},
"tools": {
"imageGeneration": {
"enabled": true,
"provider": "minimax",
"model": "image-01",
"defaultAspectRatio": "1:1"
}
}
}
```
Gemini example (Imagen 4):
```json
@ -91,7 +111,7 @@ The WebUI hides provider storage details from the user. The agent sees the saved
| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `tools.imageGeneration.enabled` | boolean | `false` | Register the `generate_image` tool |
| `tools.imageGeneration.provider` | string | `"openrouter"` | Image provider name. Supported values: `openrouter`, `aihubmix`, `gemini` |
| `tools.imageGeneration.provider` | string | `"openrouter"` | Image provider name. Supported values: `openrouter`, `aihubmix`, `minimax`, `gemini` |
| `tools.imageGeneration.model` | string | `"openai/gpt-5.4-image-2"` | Provider model name |
| `tools.imageGeneration.defaultAspectRatio` | string | `"1:1"` | Default ratio when the prompt/tool call does not specify one |
| `tools.imageGeneration.defaultImageSize` | string | `"1K"` | Default size hint, for example `1K`, `2K`, `4K`, or `1024x1024` |
@ -161,6 +181,28 @@ Configure:
`quality: low` is optional. It can make free image models faster and less likely to time out, but it is not required for correctness.
### MiniMax
MiniMax `image-01` supports text-to-image and reference-image (subject reference) edits. Supported aspect ratios are `1:1`, `16:9`, `4:3`, `3:2`, `2:3`, `3:4`, `9:16`, and `21:9`.
```json
{
"providers": {
"minimax": {
"apiKey": "${MINIMAX_API_KEY}"
}
},
"tools": {
"imageGeneration": {
"enabled": true,
"provider": "minimax",
"model": "image-01",
"defaultAspectRatio": "1:1"
}
}
}
```
### Gemini
nanobot supports two Gemini image generation model families via Google's Generative Language API:
@ -245,7 +287,7 @@ Use the reference image. Keep the same robot and composition, change the palette
|---------|-------|
| `generate_image` is not available | Set `tools.imageGeneration.enabled` to `true` and restart the gateway |
| Missing API key error | Configure `providers.<provider>.apiKey`; if using `${VAR_NAME}`, confirm the environment variable is visible to the gateway process |
| `unsupported image generation provider` | Use `openrouter`, `aihubmix`, or `gemini` |
| `unsupported image generation provider` | Use `openrouter`, `aihubmix`, `minimax`, or `gemini` |
| AIHubMix says `Incorrect model ID` | Use `model: "gpt-image-2-free"`; nanobot expands it to the required `openai/gpt-image-2-free` model path internally |
| Generation times out | Try a smaller/default image size, set AIHubMix `extraBody.quality` to `"low"`, or retry later |
| Reference image rejected | Reference image paths must be inside the workspace or nanobot media directory and must be valid image files |

67
nanobot/skills/image-generation/SKILL.md
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@ -42,73 +42,6 @@ For follow-up edits, pass the prior artifact `path` to `reference_images`. If th
Do not include internal replay markers such as `[Message Time: ...]`, `[image: /local/path]`, `generate_image(...)`, or `message(...)` in user-facing replies.
## Provider Notes
Do not ask users to paste API keys into chat. If configuration is needed, describe the fields; LLM provider and BYOK changes are hot-reloaded for new turns.
For OpenRouter, the image tool expects:
```json
{
"providers": {
"openrouter": {
"apiKey": "sk-or-..."
}
},
"tools": {
"imageGeneration": {
"enabled": true,
"provider": "openrouter",
"model": "openai/gpt-5.4-image-2"
}
}
}
```
For AIHubMix, the image tool expects:
```json
{
"providers": {
"aihubmix": {
"apiKey": "sk-..."
}
},
"tools": {
"imageGeneration": {
"enabled": true,
"provider": "aihubmix",
"model": "gpt-image-2-free"
}
}
}
```
AIHubMix `gpt-image-2-free` uses AIHubMix's unified predictions endpoint internally (`/v1/models/openai/gpt-image-2-free/predictions`), not the OpenAI Images `/v1/images/generations` endpoint. If it fails with "Incorrect model ID", do not assume the key lacks permission until the provider config, model name, and gateway restart have been checked.
`providers.aihubmix.extraBody` can be used for provider-specific options. For example, `"extraBody": {"quality": "low"}` is optional but can make `gpt-image-2-free` faster and less likely to time out.
For Gemini, the image tool supports two model families. Imagen 4 (`imagen-4.0-generate-001`) supports text-to-image only. Gemini Flash (`gemini-2.5-flash-image`) also supports reference-image edits. Configuration:
```json
{
"providers": {
"gemini": {
"apiKey": "AIza..."
}
},
"tools": {
"imageGeneration": {
"enabled": true,
"provider": "gemini",
"model": "imagen-4.0-generate-001"
}
}
}
```
For Gemini models, `defaultImageSize` has no effect; use `defaultAspectRatio` instead. Imagen 4 supports `1:1`, `9:16`, `16:9`, `3:4`, and `4:3`.
## Examples
Generate a new image: