# BodyKind

**Kind:** Type

**Source:** [`atloria-monorepo/packages/ui-core/src/components/api-explorer/multipart.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/packages/ui-core/src/components/api-explorer/multipart.ts#L14)

What an operation's request body actually IS, and what a reader needs on screen to supply it.

The playground read exactly one media type — `application/json` — and offered a textarea for
everything. An operation declaring `multipart/form-data` therefore rendered a JSON box that
could never produce a valid upload, with nothing on screen saying so: the reader typed
something plausible and got a 400 back. Two of this API's own controllers are in that state.

Kept as pure functions with no Lit dependency so the shape can be tested, and so the request
panel, the code samples and the send path all read the SAME answer rather than each
re-deriving it from the spec and disagreeing.

## Definition

```ts
'none' | 'json' | 'multipart' | 'binary'
```