> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sia.vision/llms.txt
> Use this file to discover all available pages before exploring further.

# Start a Production from a Scene

> production_scene_save: permissions and generated input/output contracts.

`production_scene_save` · Gateway release **0.8.3**

Scene-first setup or explicit source update. When reusing a completed Character Look, choose its Storyworld for the Scene and Production and pin its exact Character version; current Look attachment requires that same Storyworld. Start requires Storyworld, title and an explicit format (ask 1:1 or 16:9 once unless supplied), plus either an inspected existing Scene/documentVersion or a new sceneTitle/script. Format stays fixed through frames, takes and export. Update requires productionId/expectedVersion/documentVersion; source edits invalidate downstream readiness without replacing saved media. Retry only the identical operationId.

Required scopes: `account:read`, `production:write`. Changes saved state or requests work; review the operation’s effects.

Availability depends on runtime configuration and the permissions granted to this connection. Use live MCP discovery as the authority.

## Input

```json theme={null}
{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "start",
        "update"
      ]
    },
    "operationId": {
      "type": "string",
      "pattern": "^[a-zA-Z0-9-]{16,64}$",
      "description": "Persist a client-generated UUID before this mutation. Repeat identical inputs and this same ID after interruption; a new ID is a new request."
    },
    "productionId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$",
      "description": "ID of the saved Production whose asset context must remain pinned."
    },
    "storyworldId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$",
      "description": "ID of an accessible saved Storyworld returned by discovery. Keep this destination fixed for the operation."
    },
    "title": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "sceneId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$"
    },
    "sceneTitle": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200
    },
    "script": {
      "type": "string",
      "minLength": 1,
      "maxLength": 50000
    },
    "documentVersion": {
      "type": "integer",
      "minimum": 1
    },
    "expectedVersion": {
      "type": "integer",
      "minimum": 1,
      "description": "Copy the current version from the latest workflow read. Refresh after a conflict; never increment or guess it."
    },
    "aspectRatio": {
      "type": "string",
      "enum": [
        "1:1",
        "16:9",
        "9:16"
      ]
    }
  },
  "required": [
    "mode",
    "operationId"
  ]
}
```

## Declared output — partial envelope

This is a partial versioned envelope, not the complete Production receipt. Read the operation’s returned progress and retained result; queued work is not completed media.

```json theme={null}
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "schemaVersion": {
      "type": "string",
      "const": "1"
    }
  },
  "required": [
    "schemaVersion"
  ],
  "additionalProperties": {}
}
```

[All tools](https://docs.sia.vision/mcp-reference.md) · [Permissions](https://docs.sia.vision/authentication.md) · [Media and recovery](https://docs.sia.vision/media-and-recovery.md)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.