```ruby
# Namespace for all letcert's classes.
module LetsCert

  # Letscert version number
  VERSION = '0.0.1'

end

require_relative 'letscert/runner'
```

Add LetsCert::Error: an exeception class as abse for all LetsCert errors.
user
```ruby
# Namespace for all letcert's classes.
module LetsCert

  # Letscert version number
  VERSION = '0.0.1'


  # Base error class
  class Error < StandardError; end

end

require_relative 'letscert/runner'
```
assistant