#1. When using latest import of github.com/getkin/kin-openapi v0.61.0

#2. get error on generated server code "Swagger not declared by package openapi3"

// GetSwagger returns the Swagger specification corresponding to the generated code
// in this file.
func GetSwagger() (*openapi3.Swagger, error)

#3. My generate command is as follows:
oapi-codegen --generate chi-server,spec --package api ./openapi-spec/openapi-spec.yaml > ./api/server-gen.go

My apologies , guess i need to stick with version 0.53.0 closing issue