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Yohta KimuraandClaude Opus 4.6
43922d55b0
When a service declares an env var without a value (e.g. `- KEY` or `KEY:`), MappingWithEquals stores it as a nil *string. The previous condition `existing != nil && ...` skipped the warning for this case, allowing silent overwrites. Change to `existing == nil || ...` so the warning fires for both nil (shell-inherit) and value-mismatch cases. Add e2e tests for both list-style (`- KEY`) and map-style (`KEY:`) YAML forms to lock in the behavior. Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> Signed-off-by: Yohta Kimura <[email protected]>