# buildStock

mutation · in the family [Inventory operations](/reference/inventory-operations/)

## What it does

Assemble kits — consume component stock to produce finished kit stock, per the kit’s recipe.

BUILD kits from component stock. The named II must be ACTIVE + kit-TYPED (bundles NEVER build; VALIDATION/INVALID naming the styleType); the BOM must be non-empty and within the 49-component transaction bound; every component variant ACTIVE + its II existing at the SAME facility (movements never auto-vivify, IV-b). Consuming below zero is ALLOWED + stamps overcommitted per leg. Movements thread NO revision; a raced concurrent movement is retryable CONFLICT/REVISION_STALE. Requires the unrestricted capability.

## What happens

One all-or-nothing transaction: components go down, the built kit goes up, value carries over exactly.

## Careful

Consumes real component stock — un-building is its own operation (break), not an undo.

## Who may call it

Capability area: **Inventory operations** — Receiving, counting, transferring and moving stock.

- Owner
- Manager
- Associate Manager
- Warehouse Associate
- An API key whose scope allows `api:buildStock`

## Arguments

| Name | Type | Required | Notes |
| --- | --- | --- | --- |
| `input` | [BuildStockInput](/types/BuildStockInput/) `BuildStockInput!` | yes | No further notes. |

## Returns

[StockAssembly](/types/StockAssembly/) `StockAssembly!` — An assembly movement outcome: the KIT leg + the component legs of the ONE transaction, in recipe order (BOM-edge id ASC). The entry movement types (build_consume | build_produce | break_consume | break_produce) carry direction.

## Example request

```graphql
mutation ExampleBuildStock($input: BuildStockInput!) {
  buildStock(input: $input) {
    kit {
      inventoryItem {
        id
        sysId
        type
        caption
        status
        parentId
        rootId
        createdAt
        updatedAt
        revisionNum
        revision
        logicalFacilityId
        styleType
        controlClass
        onHandQty
        reservedQty
        inTransitQty
        damagedQty
        heldQty
        onOrderQty
        availableQty
      }
    }
  }
}
```

Variables:

```json
{
  "input": {
    "inventoryItemId": "01900000-0000-7000-8000-9307d9650000",
    "quantity": "2",
    "caption": "Blue jeans"
  }
}
```

Send it with the envelope naming the version: `"extensions": {"at": {"version": {"name":"genesis","number":0}}}`.

## Example response

```json
{
  "data": {
    "buildStock": {
      "kit": {
        "inventoryItem": {
          "id": "01900000-0000-7000-8000-37386ae00000",
          "sysId": "IV-EXMP-0000-000F",
          "type": "InventoryItem",
          "caption": "Blue jeans",
          "status": "active",
          "parentId": "01900000-0000-7000-8000-065235280000",
          "rootId": "01900000-0000-7000-8000-a093dd800000",
          "createdAt": "2027-01-31T00:00:00.000Z",
          "updatedAt": "2027-01-31T00:00:00.000Z",
          "revisionNum": 1,
          "revision": "01900000-0000-7000-8000-b7960e180000",
          "logicalFacilityId": "01900000-0000-7000-8000-8026f71c0000",
          "styleType": "<style type>",
          "controlClass": "<control class>",
          "onHandQty": "<on hand qty>",
          "reservedQty": "<reserved qty>",
          "inTransitQty": "<in transit qty>",
          "damagedQty": "<damaged qty>",
          "heldQty": "<held qty>",
          "onOrderQty": "<on order qty>",
          "availableQty": "<available qty>"
        }
      }
    }
  },
  "extensions": {
    "at": {
      "callId": "01EXAMPLE-CALL-ID",
      "version": {
        "requested": {
          "name": "genesis",
          "number": 0
        },
        "serviced": {
          "name": "genesis",
          "number": 0
        }
      }
    }
  }
}
```

## Errors this call can answer

- `VALIDATION/INVALID` — Something in the request is not valid. ([VALIDATION](/errors/VALIDATION/))
- `AUTHN/REQUIRED` — Sign in to do this. ([AUTHN](/errors/AUTHN/))
- `AUTHZ/FORBIDDEN` — Your role does not allow this action. ([AUTHZ](/errors/AUTHZ/))
- `RATE_LIMIT/THROTTLED` — Too many requests in a short time. ([RATE_LIMIT](/errors/RATE_LIMIT/))
- `NOT_FOUND/*` — That record could not be found. ([NOT_FOUND](/errors/NOT_FOUND/))
- `CONFLICT/*` — The record’s state, or a change made in the meantime, does not allow this; the codes are on the CONFLICT page. ([CONFLICT](/errors/CONFLICT/))
- `VALIDATION/VERSION_REQUIRED` — The request did not say which app version it came from. ([VALIDATION](/errors/VALIDATION/))

## Used in

- [Sell items together as a kit](/use-cases/sell-a-kit/)