# VariantComponent

object type

A variant component — ONE bill-of-materials edge: quantity units of a COMPONENT Variant inside a kit/bundle HOST Variant. Parent = the HOST Variant (components die with it). The coupling matrix gates creation: a kit assembles simple component variants ONLY; a bundle groups simple | service | kit (never bundles — acyclic BY TYPE). Composition (host x component) is unique (a live duplicate is CONFLICT/IDENTITY_TAKEN naming the holder); REMOVE = doom (TWO_STATE — history preserved); re-adding mints a NEW record via marker takeover. BUILD/BREAK stock semantics + assembly-mode policy evaluation are consumers of this stored shape.

## Fields

| Field | Type | Notes |
| --- | --- | --- |
| `id` | [ID](/types/#scalars) `ID!` | The record’s id — a UUID the platform assigned when the record was created; every reference to this record uses it. |
| `sysId` | [String](/types/#scalars) `String!` | The group-scoped human-facing system id (VC-…). |
| `type` | [String](/types/#scalars) `String!` | The kind of record — always `VariantComponent` here. |
| `caption` | [String](/types/#scalars) `String!` | The record’s display name — what people see it called. |
| `status` | [String](/types/#scalars) `String!` | The FSM state: active \| doomed. |
| `parentId` | [ID](/types/#scalars) `ID!` | The parent HOST Variant; for a VariantComponent parentId!== rootId. |
| `rootId` | [ID](/types/#scalars) `ID!` | The org-group family root. |
| `createdAt` | [String](/types/#scalars) `String!` | When the record was created, as a UTC timestamp. |
| `updatedAt` | [String](/types/#scalars) `String!` | When the record last changed, as a UTC timestamp. |
| `revisionNum` | [Int](/types/#scalars) `Int!` | How many times this record has been edited; the first save is 0. |
| `revision` | [ID](/types/#scalars) `ID!` | The OCC revision token — supply it on every mutation of this record; rotates on every write. |
| `refCaptions` | [RefCaption](/types/RefCaption/) `[RefCaption!]!` | The server-composed captions of this record's declared references (the referenced-caption rule) — one row per referenced id; see RefCaption. |
| `componentVariantId` | [ID](/types/#scalars) `ID!` | The COMPONENT Variant — set at creation, IMMUTABLE thereafter. |
| `quantity` | [Int](/types/#scalars) `Int!` | Whole units of the component per ONE host unit (1..1000000). Mutable — the quantity change is an ordinary edit. |

## Used by

- [createVariantComponent](/reference/variant-component/createVariantComponent/)
- [doomVariantComponent](/reference/variant-component/doomVariantComponent/)
- [updateVariantComponent](/reference/variant-component/updateVariantComponent/)
- [variantComponent](/reference/variant-component/variantComponent/)