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Thor::UndefinedCommandError:
Could not find command "mountable_engine?".
# ./.bundle/gems/ruby/3.4.0/gems/thor-1.5.0/lib/thor/base.rb:615:in 'Thor::Base::ClassMethods#handle_no_command_error'
Keep the stubbed `mountable_engine?` out of Thor's command list
Thor turns every public instance method defined on a generator into a command
and runs all of them on `invoke_all`
Wrap the stub in `no_commands`, Thor's own escape hatch for defining methods
that are not commands.
JonRowe
reviewed
Sep 1, 2026
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Keep the stubbed
mountable_engine?out of Thor's command listThor turns every public instance method defined on a generator into a command and runs all of them on
invoke_allWrap the stub in
no_commands, Thor's own escape hatch for defining methods that are not commands.As seen in eg https://github.com/rspec/rspec-rails/actions/runs/33024598274/job/98418758302?pr=2914