`POST` `/cohort/create`

Create Cohort

Create cohorts using composable infra architecture.

Request Body (`CreateCohortApiRequest`)

Field	Type	Required	Description
`cohorts`	`CreateCohortItem`[]	Yes	List of cohorts to create
`idempotency_key`	`string`	No	Operation key for ack — promotes or rejects a dormant create
`soft`	`boolean`	No	Stage the create dormant (active=False) — propose; the ack ({idempotency_key, accept}) promotes/rejects it
`accept`	`boolean`	No	Accept (promote) or reject dormant state. Only meaningful with idempotency_key

Field	Type	Required	Description
`results`	`CohortResultItem`[]	Yes	List of operation results
`idempotency_key`	`string`	No	Idempotency key echoed back for client correlation