{
  "scope": "Synthetic offline parser projections, not CLI end-to-end certification. Tool arguments are parsed data, never executed.",
  "claude-code": [
    {
      "role": "user",
      "blocks": [
        {
          "kind": "text",
          "text": "Question"
        }
      ]
    },
    {
      "role": "assistant",
      "blocks": [
        {
          "kind": "thinking",
          "text": "Hidden"
        },
        {
          "kind": "text",
          "text": "Answer"
        },
        {
          "kind": "tool_use",
          "toolName": "Read",
          "toolId": "tool-synthetic",
          "toolInput": {
            "file_path": "synthetic.txt"
          }
        }
      ]
    },
    {
      "role": "user",
      "blocks": [
        {
          "kind": "tool_result",
          "text": "Synthetic tool output",
          "toolId": "tool-synthetic",
          "isError": false
        }
      ]
    },
    {
      "role": "user",
      "blocks": [
        {
          "kind": "text",
          "text": "Legacy string"
        }
      ]
    }
  ],
  "codex": [
    {
      "role": "user",
      "blocks": [
        {
          "kind": "text",
          "text": "Question"
        }
      ]
    },
    {
      "role": "assistant",
      "blocks": [
        {
          "kind": "tool_use",
          "toolName": "exec_command",
          "toolId": "call-synthetic",
          "toolInput": {
            "command": "echo synthetic"
          }
        }
      ]
    },
    {
      "role": "user",
      "blocks": [
        {
          "kind": "tool_result",
          "text": "Synthetic tool output",
          "toolId": "call-synthetic",
          "isError": false
        }
      ]
    },
    {
      "role": "assistant",
      "blocks": [
        {
          "kind": "text",
          "text": "Answer"
        }
      ]
    }
  ]
}