Technically, a reporter is a module that gets injected into a RSpec formatter class. It uses method aliasing to extend some (usually just one) of the formatter‘s methods.

Implementing a custom reporter is as simple as creating a module and setting up the appropriate aliases. Use `BaseReporter.enhance_with_screenshot` if you don‘t want to set up the aliases manually:

  module MyReporter
    extend Capybara::Screenshot::RSpec::BaseReporter

    # Will replace the formatter's original `dump_failure_info` method with
    # `dump_failure_info_with_screenshot` from this module:
    enhance_with_screenshot :dump_failure_info

    def dump_failure_info_with_screenshot(example)
      dump_failure_info_without_screenshot(example) # call original implementation
      ... # your additions here
    end
  end

Finally customize `Capybara::Screenshot::RSpec::FORMATTERS` to make sure your reporter gets injected into the appropriate formatter.