x-source-doc
`x-source-doc` appears on operations and on request bodies. Its value is a string. Used by 3 providers across 8 OpenAPI documents. Observed values include `https://developer.gorelas.com/api-docs-md/request-8.md`, `https://developer.gorelas.com/api-docs-md/request-1.md`, `https://developer.gorelas.com/api-docs-md/request-2.md`, `https://developer.gorelas.com/api-docs-md/request-3.md`. Consistent with documentation & dx — this is inferred from where the key appears and what it carries, not from any published definition.
Where it appears
| Location in the document | Occurrences | |
|---|---|---|
| requestBody | 18 | |
| operation | 35 |
What its value looks like
| Value shape | Occurrences |
|---|---|
| string | 53 |
Observed values
Sampled from the specifications, most frequent first.
Providers publishing it
All 3.
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 documentation & dx job.