Feature: Eval smoke test (binary load and eval step reporting)
This is an eval smoke test, not a command-surface verification test.
AT-004 command-surface evidence uses focused palette, slash-completion,
and help unit tests. This feature confirms the binary loads and the eval
harness reports step-level success for a shell command.
Scenario: Binary loads and reports step-level success via eval
Given a clean CodeWhale evaluation workspace
When the evaluation harness runs a shell command
Then the binary exits without crashing
And the JSON report contains execution steps