OptionalbaseOptionalclientWhen set, defines OpenAPIClientDeclaration.key after slugification.
When omitted, key comes from slugified info.title, or "default" if there is no title.
Directory loading (@boundfetch/plugin-openapi/node) always sets this from the filename stem (without
.json/.yaml/.yml), so keys match files, not info.title.
OptionaldefaultUsed only when neither baseUrl nor a usable servers[0].url is available (see OpenAPISpec).
Optionalstrict
Highest priority; overrides any usable
servers[0].url.