[neilvcarvalho]

Every matrix job in CI has failed since 2026-10-16, on any branch, before a single spec runs:

LoadError: cannot load such file -- cucumber/rake/task (LoadError)
  Rakefile:6

Cause

cucumber was never declared as a dependency of this project. It arrived through aruba, a development dependency, which listed cucumber as a runtime dependency up to 2.x. aruba 3.0.0 (2026-10-16) "depends only on cucumber-core at runtime" and moved cucumber to its own development dependencies.

The build workflow resolves the appraisal gemfiles fresh on every run, because gemfiles/*.gemfile.lock are not tracked, so every matrix job now installs aruba 3.0.1 without cucumber. The standard job keeps passing because it uses the tracked Gemfile.lock, which pins aruba 2.3.2, and local runs keep passing because the untracked appraisal lockfiles on a developer machine pin whatever aruba they last resolved. main's last green matrix run was the push on 2026-10-13, before the aruba release.

Change

Declare cucumber as a development dependency in the gemspec, with a floor of 10, since the Rakefile and the features use it directly. Gemfile.lock gains the cucumber (>= 10) line under DEPENDENCIES; the gem itself was already in the lock through aruba.

The floor matters on Ruby 3.2. The first CI run of this PR, with cucumber unconstrained, passed everywhere except the five Ruby 3.2 jobs: Bundler kept aruba 3 and its cucumber-core 20, could not use cucumber 12 (Ruby 3.3 or newer) or cucumber 11 (cucumber-core below 17), and fell back to cucumber 1.3.20, which rejects the --publish-quiet option in cucumber.yml. With the floor, Ruby 3.2 resolves aruba 3 with cucumber 11, Ruby 3.1 resolves aruba 2 with cucumber 10, and Ruby 3.3 or newer resolves cucumber 12, all of which aruba supports.

Verification

• Reproduced CI's resolution in a clean checkout with no appraisal lockfile: BUNDLE_GEMFILE=gemfiles/7.0.gemfile bundle install now resolves aruba 3.0.1, cucumber 12.0.1 and cucumber-core 20.0.0, and bundle exec rake all_specs passes: 334 unit examples, 451 acceptance examples, 4 Cucumber scenarios. aruba 3 still ships aruba/cucumber, which features/support/env.rb requires, so the features run unchanged.
• Reproduced the Ruby 3.2 case the same way under Ruby 3.2.11: with the floor, the fresh resolution gives aruba 3.0.1, cucumber 11.1.1 and cucumber-core 16.2.0, and bundle exec rake all_specs passes with the same counts.
• The default Gemfile still resolves with the tracked lock unchanged apart from the new dependency entry.