{
  "fixtures": [
    {
      "name": "dangling_action_reference",
      "description": "Plan references an action that does not exist in the registry",
      "input": {
        "plan_id": "plan-001",
        "action_ref": "local/nonexistent-action",
        "project_refs": ["local/my-project"]
      },
      "expected_error": "action not found: local/nonexistent-action"
    },
    {
      "name": "unresolvable_project_path",
      "description": "Plan references a project with a path that cannot be resolved",
      "input": {
        "plan_id": "plan-002",
        "action_ref": "local/build-app",
        "project_refs": ["local/../../escape-project"]
      },
      "expected_error": "unresolvable project path: local/../../escape-project"
    },
    {
      "name": "missing_actor_for_phase",
      "description": "Action config missing the required actor for the current phase",
      "input": {
        "action_name": "local/incomplete-action",
        "phase": "execution",
        "actor_config": {
          "strategy_actor": "openai/gpt-4"
        }
      },
      "expected_error": "missing actor for phase 'execution': execution_actor not configured"
    },
    {
      "name": "dangling_parent_plan_id",
      "description": "Plan references a parent plan that does not exist",
      "input": {
        "plan_id": "plan-child-001",
        "parent_plan_id": "plan-parent-missing",
        "action_ref": "local/build-app"
      },
      "expected_error": "parent plan not found: plan-parent-missing"
    },
    {
      "name": "resource_type_not_registered",
      "description": "Resource references a type that is not in the resource type registry",
      "input": {
        "resource_name": "my-custom-resource",
        "resource_type": "custom/unregistered-type",
        "project_ref": "local/my-project"
      },
      "expected_error": "resource type not registered: custom/unregistered-type"
    },
    {
      "name": "circular_resource_dependency",
      "description": "Resource DAG contains a circular dependency chain",
      "input": {
        "resources": [
          {"name": "res-a", "depends_on": ["res-b"]},
          {"name": "res-b", "depends_on": ["res-c"]},
          {"name": "res-c", "depends_on": ["res-a"]}
        ]
      },
      "expected_error": "circular dependency detected: res-a -> res-b -> res-c -> res-a"
    }
  ]
}