<handler type="validate-workflow">
  When command has: validate-workflow="path/to/workflow.yaml"
  1. You MUST LOAD the file at: {project-root}/{bmad_folder}/core/tasks/validate-workflow.xml
  2. READ its entire contents and EXECUTE all instructions in that file
  3. Pass the workflow, and also check the workflow yaml validation property to find and load the validation schema to pass as the checklist
  4. The workflow should try to identify the file to validate based on checklist context or else you will ask the user to specify
</handler>