feat(plugins): 方舟 Agent Plan - 新增图片与视频协议插件

独立 /api/plan/v3 Seedream、Seedance 插件,并同步宿主能力默认值与渠道识别,避免与官方 /api/v3 凭证混用。

Co-authored-by: Cursor <cursoragent@cursor.com>
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VicoHu
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# Volcengine Ark Agent Plan Seedream Images
该目录是独立官方协议插件源码。后端从生成的 `volcengine-ark-agent-plan-seedream.yingce-plugin` 包加载,不依赖系统内置 `host:` 适配器。
完整接口见 [docs/interface.md](docs/interface.md)。

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# Volcengine Ark Agent Plan Seedream Images 接口字段
## 协议身份
- 插件 ID:`volcengine-ark-agent-plan-seedream`。
- Provider ID:`volcengine-ark-agent-plan-image`。
- 能力:`image`。
- 默认 Base URL:`https://ark.cn-beijing.volces.com`。
- 鉴权驱动:`bearer`。
- 创建:`POST /api/plan/v3/images/generations`。
- 生命周期:同步响应。
## 配置字段
| 字段 | 类型 | 必填 | 含义 |
| --- | --- | --- | --- |
| `apiKey` | secret | 是 | API Key |
## 统一字段映射
| 统一字段 | 类型 | 必填 | 上游映射 | 说明 |
| --- | --- | --- | --- | --- |
| `model` | string | 是 | `model` | 图片模型 ID。 |
| `prompt` | string | 是 | `prompt` | 图片提示词。 |
| `images` | media[] | 否 | `provider image/reference fields` | 参考图或编辑源图,role 由业务层确定。 |
| `imageCount` | integer | 否 | `n/sample_count` | 输出数量。 |
| `aspectRatio` | string | 否 | `size/aspect_ratio` | 比例或尺寸,语义按协议说明。 |
| `resolution` | string | 否 | `resolution/imageSize` | 分辨率档位。 |
| `quality` | string | 否 | `quality` | 质量档位。 |
| `providerOptions` | object | 否 | `provider-specific fields` | 插件命名空间内的厂商扩展字段。 |
## 上游请求模板逐字段清单
下表由插件请求模板生成,覆盖 body、query、headers 和 multipart 文件声明中的每个字段。
| 上游位置 | 值或转换表达式 |
| --- | --- |
| `create.method` | `"POST"` |
| `create.path` | `"/api/plan/v3/images/generations"` |
| `create.contentType` | `"application/json"` |
| `create.body.model` | `{"$ref":"request.model"}` |
| `create.body.prompt` | `{"$ref":"request.prompt"}` |
| `create.body.size` | `{"$omitEmpty":{"$switch":{"cases":[{"when":{"$eq":[{"$ref":"request.aspectRatio"},"auto"]},"then":"2k"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"1:1"]},"then":"2048x2048"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"4:3"]},"then":"2304x1728"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"3:4"]},"then":"1728x2304"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"16:9"]},"then":"2560x1440"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"9:16"]},"then":"1440x2560"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"3:2"]},"then":"2496x1664"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"2:3"]},"then":"1664x2496"},{"when":{"$eq":[{"$ref":"request.aspectRatio"},"21:9"]},"then":"3024x1296"}],"default":{"$ref":"request.aspectRatio"}}}}` |
| `create.body.image` | `{"$omitEmpty":{"$if":{"condition":{"$eq":[{"$len":{"$ref":"request.images"}},1]},"then":{"$first":{"$map":{"from":{"$ref":"request.images"},"as":"media","in":{"$ref":"media.value"}}}},"else":{"$if":{"condition":{"$gt":[{"$len":{"$ref":"request.images"}},1]},"then":{"$map":{"from":{"$ref":"request.images"},"as":"media","in":{"$ref":"media.value"}}},"else":null}}}}}` |
| `create.body.sequential_image_generation` | `{"$omitEmpty":{"$ref":"request.providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation"}}` |
| `create.body.sequential_image_generation_options` | `{"$omitEmpty":{"$ref":"request.providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation_options"}}` |
| `create.body.watermark` | `{"$coalesce":[{"$ref":"request.providerOptions.volcengine-ark-agent-plan-image.watermark"},{"$ref":"request.watermark"},false]}` |
| `create.body.seed` | `{"$omitEmpty":{"$ref":"request.providerOptions.volcengine-ark-agent-plan-image.seed"}}` |
| `create.body.response_format` | `{"$coalesce":[{"$ref":"request.providerOptions.volcengine-ark-agent-plan-image.response_format"},"b64_json"]}` |
## Provider 扩展键
- `providerOptions.volcengine-ark-agent-plan-image.response_format`
- `providerOptions.volcengine-ark-agent-plan-image.seed`
- `providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation`
- `providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation_options`
- `providerOptions.volcengine-ark-agent-plan-image.watermark`
动态模型或工作流允许使用文档声明的完整 `parameters/input/extra_body` 对象;该对象是协议本身的开放 schema,不会被宿主裁剪。
## 响应映射逐字段清单
| 映射位置 | 上游路径或转换表达式 |
| --- | --- |
| `response.status` | `"succeeded"` |
| `response.images` | `{"$ref":"response.data"}` |
| `response.usage` | `{"$ref":"response.usage"}` |
| `response.errorPaths[0]` | `"error.code"` |
| `response.messagePaths[0]` | `"error.message"` |
## 响应与错误
插件把上游 task/status/text/media/usage 映射为统一结果。临时媒体 URL 标记为 ephemeral,由宿主立即下载持久化。HTTP 错误、业务 code 和 error object 保持失败语义,不包装成成功。
## 兼容边界
Agent Plan 专属接入:请求路径为 /api/plan/v3/images/generations,必须使用 Agent Plan 控制台专属 API Key;请求体与官方 Seedream 协议一致,但凭证与额度按 AFP 套餐结算,不能与 /api/v3 官方 Key 混用。
<!-- YINGCE_MANIFEST_CONTRACT_START -->
## Manifest 完整接口定义
以下 JSON 与插件包内实际 `manifest.json` 逐字段一致,覆盖插件身份、权限、配置、鉴权、参数、校验、创建、Agent、查询、取消、结果下载、响应和 Agent 响应映射。`documentation` 字段的值就是当前完整文档;为避免文档在自身内部无限递归,JSON 中仅用等义占位文本表示正文。
```json
{
"apiVersion": "yingce.plugin/v2",
"id": "volcengine-ark-agent-plan-seedream",
"name": "Volcengine Ark Agent Plan Seedream Images",
"version": "2.0.0",
"author": "Volcengine / 影策",
"description": "Volcengine Ark Agent Plan Seedream Images 独立请求协议插件。",
"documentation": "<当前插件的完整 documentation,由 README.md 与 docs/interface.md 拼接而成;为避免 JSON 递归,此处不重复展开正文。>",
"permissions": [
"generation.run",
"media.read"
],
"configuration": {
"fields": [
{
"name": "apiKey",
"type": "secret",
"label": "API Key",
"required": true
}
]
},
"contributes": {
"providers": [
{
"id": "volcengine-ark-agent-plan-image",
"label": "Volcengine Ark Agent Plan Seedream Images",
"capabilities": [
"image"
],
"scopes": [
"admin.system-channel",
"user.custom-channel",
"canvas",
"creation",
"agent"
],
"baseUrl": "https://ark.cn-beijing.volces.com",
"requiresPublicMediaUrls": false,
"auth": {
"type": "bearer",
"field": "apiKey"
},
"parameters": [
{
"name": "model",
"type": "string",
"required": true,
"mapping": "model",
"description": "图片模型 ID。"
},
{
"name": "prompt",
"type": "string",
"required": true,
"mapping": "prompt",
"description": "图片提示词。"
},
{
"name": "images",
"type": "media[]",
"required": false,
"mapping": "provider image/reference fields",
"description": "参考图或编辑源图,role 由业务层确定。"
},
{
"name": "imageCount",
"type": "integer",
"required": false,
"mapping": "n/sample_count",
"description": "输出数量。"
},
{
"name": "aspectRatio",
"type": "string",
"required": false,
"mapping": "size/aspect_ratio",
"description": "比例或尺寸,语义按协议说明。"
},
{
"name": "resolution",
"type": "string",
"required": false,
"mapping": "resolution/imageSize",
"description": "分辨率档位。"
},
{
"name": "quality",
"type": "string",
"required": false,
"mapping": "quality",
"description": "质量档位。"
},
{
"name": "providerOptions",
"type": "object",
"required": false,
"mapping": "provider-specific fields",
"description": "插件命名空间内的厂商扩展字段。"
}
],
"create": {
"method": "POST",
"path": "/api/plan/v3/images/generations",
"contentType": "application/json",
"body": {
"model": {
"$ref": "request.model"
},
"prompt": {
"$ref": "request.prompt"
},
"size": {
"$omitEmpty": {
"$switch": {
"cases": [
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"auto"
]
},
"then": "2k"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"1:1"
]
},
"then": "2048x2048"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"4:3"
]
},
"then": "2304x1728"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"3:4"
]
},
"then": "1728x2304"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"16:9"
]
},
"then": "2560x1440"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"9:16"
]
},
"then": "1440x2560"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"3:2"
]
},
"then": "2496x1664"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"2:3"
]
},
"then": "1664x2496"
},
{
"when": {
"$eq": [
{
"$ref": "request.aspectRatio"
},
"21:9"
]
},
"then": "3024x1296"
}
],
"default": {
"$ref": "request.aspectRatio"
}
}
}
},
"image": {
"$omitEmpty": {
"$if": {
"condition": {
"$eq": [
{
"$len": {
"$ref": "request.images"
}
},
1
]
},
"then": {
"$first": {
"$map": {
"from": {
"$ref": "request.images"
},
"as": "media",
"in": {
"$ref": "media.value"
}
}
}
},
"else": {
"$if": {
"condition": {
"$gt": [
{
"$len": {
"$ref": "request.images"
}
},
1
]
},
"then": {
"$map": {
"from": {
"$ref": "request.images"
},
"as": "media",
"in": {
"$ref": "media.value"
}
}
},
"else": null
}
}
}
}
},
"sequential_image_generation": {
"$omitEmpty": {
"$ref": "request.providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation"
}
},
"sequential_image_generation_options": {
"$omitEmpty": {
"$ref": "request.providerOptions.volcengine-ark-agent-plan-image.sequential_image_generation_options"
}
},
"watermark": {
"$coalesce": [
{
"$ref": "request.providerOptions.volcengine-ark-agent-plan-image.watermark"
},
{
"$ref": "request.watermark"
},
false
]
},
"seed": {
"$omitEmpty": {
"$ref": "request.providerOptions.volcengine-ark-agent-plan-image.seed"
}
},
"response_format": {
"$coalesce": [
{
"$ref": "request.providerOptions.volcengine-ark-agent-plan-image.response_format"
},
"b64_json"
]
}
}
},
"response": {
"status": "succeeded",
"images": {
"$ref": "response.data"
},
"usage": {
"$ref": "response.usage"
},
"errorPaths": [
"error.code"
],
"messagePaths": [
"error.message"
]
}
}
]
}
}
```
<!-- YINGCE_MANIFEST_CONTRACT_END -->

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