Worked on the ash-project/ash_phoenix repository to enhance action form parameter handling in Elixir and Phoenix Framework applications. Developed and documented a new :params option for Form.for_action, enabling default form values to be initialized and improving the reliability of parameter workflows. Addressed a bug by ensuring the :raw_params field is correctly initialized, which reduces parameter-related defects and streamlines debugging. Expanded test coverage for generic actions and action forms, strengthening regression safety and reliability. Updated documentation and examples to provide clearer guidance for developers, ultimately improving onboarding and reducing support overhead. Focused on documentation, Elixir, and comprehensive testing practices.