Implementation Plan for --hook=<hook> Flag

• Understand the current implementation of eval and eval-file commands
• Add --hook=<hook> parameter to Eval_Command class
• Add --hook=<hook> parameter to EvalFile_Command class
• Modify execution logic to defer to WordPress hook if --hook is provided
• Update command documentation to include new flag
• Add Behat tests for eval with --hook flag
• Add Behat tests for eval-file with --hook flag
• Run linting and static analysis (all passed)
• Code review completed (suggestions noted but design choices justified)
• Security check completed (no issues found)
• Manual logic validation completed
• Refactored to use closure pattern for better readability

Summary

Successfully implemented the --hook=<hook> flag for both eval and eval-file commands. The implementation:

1. Registers code on WordPress hooks: When --hook is provided, the code/file is registered as an action callback before WordPress loads
2. Validates flag combinations: Prevents using --hook with --skip-wordpress since hooks require WordPress
3. Preserves existing behavior: When --hook is not provided, commands work exactly as before
4. Comprehensive test coverage: Added 5 new test scenarios covering various use cases and error conditions
5. Uses closure pattern: Execution logic is defined once and either passed to hook registration or executed directly, improving code readability and reducing duplication

The implementation follows WordPress conventions and matches the behavior of add_action(), providing flexibility for users to execute code at any point in the WordPress lifecycle.

• Fixes Add --hook=<hook> flag to eval and shell to choose timing ideas#146

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