{
  "workflow_name": "bracket_stiffness_workflow",
  "description": "End-to-end workflow for bracket stiffness optimization",
  "version": "1.0",

  "workflow_steps": [
    {
      "step": 1,
      "name": "update_design_variables",
      "description": "Update NX model expressions with trial parameters",
      "action": "nx_update_expressions",
      "inputs": {
        "model_file": "1_setup/model/Bracket.prt",
        "expressions": {
          "support_angle": "{{support_angle}}",
          "tip_thickness": "{{tip_thickness}}"
        }
      },
      "outputs": ["updated_model"],
      "on_failure": "abort_trial"
    },

    {
      "step": 2,
      "name": "solve_simulation",
      "description": "Run NX Nastran SOL 101 linear static analysis",
      "action": "nx_solve",
      "inputs": {
        "sim_file": "1_setup/model/Bracket_sim1.sim",
        "solver": "NX_Nastran",
        "solution": "SOL101"
      },
      "outputs": ["op2_file", "f06_file"],
      "on_failure": "abort_trial",
      "timeout": 600
    },

    {
      "step": 3,
      "name": "export_displacement_field",
      "description": "Export z-displacement field from results",
      "action": "nx_journal",
      "inputs": {
        "journal_file": "1_setup/model/export_displacement_field.py",
        "sim_file": "1_setup/model/Bracket_sim1.sim"
      },
      "outputs": ["field_file"],
      "on_failure": "abort_trial"
    },

    {
      "step": 4,
      "name": "extract_results",
      "description": "Extract stiffness and mass from FEA results",
      "action": "python_extractor",
      "inputs": {
        "extractor_script": "bracket_stiffness_extractor.py",
        "field_file": "1_setup/model/export_field_dz.fld",
        "op2_file": "1_setup/model/Bracket_sim1.op2"
      },
      "outputs": {
        "stiffness": "objectives.stiffness",
        "mass": "objectives.mass",
        "displacement": "displacement",
        "force": "force"
      },
      "on_failure": "abort_trial"
    },

    {
      "step": 5,
      "name": "evaluate_constraints",
      "description": "Check mass constraint (≤ 0.2 kg) - mark as infeasible but keep for surrogate",
      "action": "constraint_check",
      "inputs": {
        "mass": "{{mass}}",
        "max_mass": 0.2
      },
      "outputs": ["constraint_satisfied"],
      "on_failure": "continue"
    },

    {
      "step": 6,
      "name": "report_results",
      "description": "Send results to optimization engine and dashboard",
      "action": "report",
      "inputs": {
        "trial_number": "{{trial_number}}",
        "objectives": {
          "stiffness": "{{stiffness}}",
          "mass": "{{mass}}"
        },
        "design_variables": {
          "support_angle": "{{support_angle}}",
          "tip_thickness": "{{tip_thickness}}"
        },
        "metadata": {
          "displacement": "{{displacement}}",
          "force": "{{force}}"
        }
      },
      "outputs": ["trial_complete"],
      "on_failure": "log_error"
    }
  ],

  "error_handling": {
    "max_retries": 2,
    "retry_delay": 5,
    "fallback_action": "skip_trial",
    "log_errors": true,
    "error_log_file": "2_results/errors.log"
  },

  "cleanup": {
    "delete_intermediate_files": false,
    "archive_results": true,
    "compress_op2": false
  },

  "logging": {
    "level": "INFO",
    "log_file": "2_results/workflow.log",
    "console_output": true,
    "log_rotation": {
      "max_size_mb": 50,
      "backup_count": 3
    }
  }
}