Automatically share context in RSpec

I want to share a memoized method between my specs. So I tried to use shared context like this

RSpec.configure do |spec|
  spec.shared_context :specs do
    let(:response) { request.execute! }
  end
end

describe 'something' do
  include_context :specs
end

It works ok. But I have about 60 spec files, so I'm forced to explicitly include context in each of them. Is there an way to automatically include shared context (or at least let definition) for all example groups in spec_helper.rb?

Something like this

RSpec.configure do |spec|
  spec.include_context :specs
end