Feature: ActorConfiguration.load_yaml_text and defensive paths
  Coverage-boost scenarios targeting uncovered lines in actor/config.py

  # --- load_yaml_text: JSON null input (lines 50-51) ---
  Scenario: load_yaml_text returns empty dict for JSON null
    When I call load_yaml_text with "null"
    Then the load_yaml_text result should be an empty dict

  # --- load_yaml_text: JSON non-dict input (lines 52-53) ---
  Scenario: load_yaml_text raises ValueError for a JSON string
    When I call load_yaml_text with a JSON string value
    Then a ValueError with message containing "object" should be raised

  Scenario: load_yaml_text raises ValueError for a JSON array
    When I call load_yaml_text with a JSON array value
    Then a ValueError with message containing "object" should be raised

  Scenario: load_yaml_text raises ValueError for a JSON integer
    When I call load_yaml_text with a JSON integer value
    Then a ValueError with message containing "object" should be raised

  # --- load_yaml_text: valid JSON dict (line 54) ---
  Scenario: load_yaml_text returns parsed dict for valid JSON object
    When I call load_yaml_text with '{"provider": "openai", "model": "gpt-4"}'
    Then the load_yaml_text result should have key "provider" equal to "openai"
    And the load_yaml_text result should have key "model" equal to "gpt-4"

  Scenario: load_yaml_text returns parsed dict for empty JSON object
    When I call load_yaml_text with '{}'
    Then the load_yaml_text result should be an empty dict

  # --- load_yaml_text: YAML fallback path ---
  Scenario: load_yaml_text falls back to YAML for non-JSON input
    When I call load_yaml_text with YAML text "provider: openai\nmodel: gpt-4\n"
    Then the load_yaml_text result should have key "provider" equal to "openai"

  # --- load_yaml_text: interpolation returns non-dict (line 89) ---
  Scenario: load_yaml_text raises ValueError when interpolation returns non-dict
    Given interpolate_env_vars is patched to return a list
    When I call load_yaml_text with valid YAML via patched interpolation
    Then a ValueError with message containing "object" should be raised