<!-- Extension API v0 — pre-1.0. Interfaces may change without notice until P2 seals the custom-code format. First-party extensions track HEAD. -->

# `catalog.stock.set`

Set stock of a product (prd_) or variant (var_). null = untracked (always available).

- **scope**: `catalog:write`
- **storefront-visible** (bumps the catalog generation): no
- **destructive**: no

## Payload

| field | type | required | notes |
|---|---|---|---|
| `id` | string (/^prd_[a-zA-Z0-9]{1,32}$/) \| string (/^var_[a-zA-Z0-9]{1,32}$/) | yes |  |
| `stock` | integer (0..9007199254740991) \| null | yes |  |

### JSON Schema

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "id": {
      "anyOf": [
        {
          "type": "string",
          "pattern": "^prd_[a-zA-Z0-9]{1,32}$"
        },
        {
          "type": "string",
          "pattern": "^var_[a-zA-Z0-9]{1,32}$"
        }
      ]
    },
    "stock": {
      "anyOf": [
        {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "id",
    "stock"
  ],
  "additionalProperties": false
}
```