Runtime & gateway

x-openapi-router-controller

`x-openapi-router-controller` appears on operations. Its value is a string. Used by 3 providers across 3 OpenAPI documents. Observed values include `athenian.api.controllers.settings_controller`, `athenian.api.controllers.filter_controller`, `airflow.api_connexion.endpoints.task_instance_endpoint`, `airflow.api_connexion.endpoints.dag_run_endpoint`. Consistent with runtime & gateway — this is inferred from where the key appears and what it carries, not from any published definition.

Runtime & gateway derived description
How this description was produced. It is assembled from what was measured in the corpus — where this key appears in a document, what shape its value takes, the values observed, and how many providers use it. It is not taken from a published definition, because for most extensions none exists. Read it as evidence, not as a specification. If you own this extension and want it described properly, tell us.
156 occurrences
3 documents
3 providers
purpose-named

Where it appears

Location in the documentOccurrences
operation 156

What its value looks like

Value shapeOccurrences
string156

Observed values

Sampled from the specifications, most frequent first.

athenian.api.controllers.settings_controllerathenian.api.controllers.filter_controllerairflow.api_connexion.endpoints.task_instance_endpointairflow.api_connexion.endpoints.dag_run_endpointairflow.api_connexion.endpoints.connection_endpointairflow.api_connexion.endpoints.dag_endpointairflow.api_connexion.endpoints.role_and_permission_endpointathenian.api.controllers.invitation_controller

Providers publishing it

All 3.

apache-airflowatheniansp-global

Why this is not in OpenAPI

Extensions exist because a provider needed something the specification would not carry. Most of what they hold is not the API contract at all — it is operational metadata about the contract: documentation, lifecycle, policy, provenance, and now agents. That metadata is usually better placed alongside the contract, in an Overlay or an APIs.json index, than crammed inside it. See everything else doing the runtime & gateway job.