business-messaging-api_v23.0.yaml is not valid

Start with business-messaging-api_v23.0.yaml and inspect the components.parameterGroups declaration reported by both validation commands. Reproduce the swagger-spec-validator and OpenAPI Generator checks, then confirm the specification passes validation and TypeScript Axios generation without the unexpected-attribute error.

The OpenAPI spec seems to not be fully valid. When we try and validate the Swagger Doc using the following command, we see it returning business-messaging-api_v23.0.yaml: attribute components.parameterGroups is unexpected

docker run --rm node:26-alpine sh -c "apk add wget && npm i -g swagger-spec-validator && wget https://raw.githubusercontent.com/facebook/openapi/main/business-messaging-api_v23.0.yaml && swagger-spec-validator business-messaging-api_v23.0.yaml"

When we try and to a TS codegen from it, it also fails

docker run --rm node:26-alpine sh -c "apk add --no-cache openjdk17-jdk && npm install -g openapi-typescript @openapitools/openapi-generator-cli && npx @openapitools/openapi-generator-cli generate -i https://raw.githubusercontent.com/facebook/openapi/main/business-messaging-api_v23.0.yaml -g typescript-axios -o /tmp/"

returns

Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 1, Warning count: 105
Errors: 
        -attribute components.parameterGroups is unexpected
Warnings: 
        -attribute components.parameterGroups is unexpected

        at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:718)
        at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:745)
        at org.openapitools.codegen.cmd.Generate.execute(Generate.java:527)
        at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
        at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)