Feature: AutoDebug graph node coverage boost
  Additional scenarios that exercise previously uncovered code paths
  in the auto_debug.py graph module, targeting individual node methods
  and edge-case LLM response handling.

  Background:
    Given the auto debug graph module is imported

  # -----------------------------------------------------------------------
  # _analyze_error node
  # -----------------------------------------------------------------------
  Scenario: Analyze error with Mock LLM response yields default analysis
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    When I call _analyze_error with an error state
    Then the analysis message should be "Error analysis completed"

  Scenario: Analyze error with real content passes through LLM output
    Given an auto debug agent with a mock LLM returning "Root cause is a null pointer"
    When I call _analyze_error with an error state
    Then the analysis message should be "Root cause is a null pointer"

  Scenario: Analyze error handles LLM invocation failure gracefully
    Given an auto debug agent with a failing LLM
    When I call _analyze_error with an error state
    Then the analysis message should be "Error analysis completed"

  # -----------------------------------------------------------------------
  # _generate_fix node
  # -----------------------------------------------------------------------
  Scenario: Generate fix with Mock LLM response yields default fix data
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    And a state with an existing error analysis message
    When I call _generate_fix with the prepared state
    Then the current fix description should be "Fix suggestion"
    And the current fix code should be "# Fixed code"

  Scenario: Generate fix parses valid JSON from LLM
    Given an auto debug agent with a mock LLM returning valid fix JSON
    And a state with an existing error analysis message
    When I call _generate_fix with the prepared state
    Then the current fix description should be "Parsed JSON fix"
    And the current fix code should be "print('fixed')"

  Scenario: Generate fix falls back on invalid JSON from LLM
    Given an auto debug agent with a mock LLM returning "not valid json at all"
    And a state with an existing error analysis message
    When I call _generate_fix with the prepared state
    Then the current fix description should be "Fix attempt 1"
    And the current fix code should be "not valid json at all"

  Scenario: Generate fix handles LLM invocation failure gracefully
    Given an auto debug agent with a failing LLM
    And a state with an existing error analysis message
    When I call _generate_fix with the prepared state
    Then the current fix description should be "Fix suggestion"
    And the current fix code should be "# Fixed code"

  Scenario: Generate fix includes previous attempt count in fallback description
    Given an auto debug agent with a mock LLM returning "still broken"
    And a state with two previous attempted fixes
    When I call _generate_fix with the prepared state
    Then the current fix description should be "Fix attempt 3"

  # -----------------------------------------------------------------------
  # _validate_fix node
  # -----------------------------------------------------------------------
  Scenario: Validate fix with Mock LLM response marks fix as valid
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should be marked as validated

  Scenario: Validate fix parses valid JSON with is_valid true
    Given an auto debug agent with a mock LLM returning valid validation JSON true
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should be marked as validated

  Scenario: Validate fix parses valid JSON with is_valid false
    Given an auto debug agent with a mock LLM returning valid validation JSON false
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should not be marked as validated
    And the current fix should be appended to attempted fixes

  Scenario: Validate fix handles invalid JSON containing positive keywords
    Given an auto debug agent with a mock LLM returning "The fix is valid and correct"
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should be marked as validated

  Scenario: Validate fix handles invalid JSON without positive keywords
    Given an auto debug agent with a mock LLM returning "The fix does not work"
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should not be marked as validated
    And the current fix should be appended to attempted fixes

  Scenario: Validate fix handles LLM invocation failure gracefully
    Given an auto debug agent with a failing LLM
    And a state with a current fix to validate
    When I call _validate_fix with the prepared state
    Then the fix should not be marked as validated

  # -----------------------------------------------------------------------
  # _should_retry_fix routing
  # -----------------------------------------------------------------------
  Scenario: Should retry fix returns retry when validation failed and under max attempts
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    When I check should_retry_fix with validated false and 1 attempt
    Then the routing decision should be "retry"

  Scenario: Should retry fix returns done when validation succeeded
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    When I check should_retry_fix with validated true and 0 attempts
    Then the routing decision should be "done"

  Scenario: Should retry fix returns done when max attempts reached
    Given an auto debug agent with a mock LLM returning "Mock LLM response" and max 2 fix attempts
    When I check should_retry_fix with validated false and 2 attempts
    Then the routing decision should be "done"

  # -----------------------------------------------------------------------
  # _finalize node
  # -----------------------------------------------------------------------
  Scenario: Finalize produces result dict from successful state
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    And a finalize state with fix_validated true and 0 attempted fixes
    When I call _finalize with the prepared state
    Then the result should indicate success true
    And the result attempts count should be 0

  Scenario: Finalize produces result dict from failed state
    Given an auto debug agent with a mock LLM returning "Mock LLM response"
    And a finalize state with fix_validated false and 3 attempted fixes
    When I call _finalize with the prepared state
    Then the result should indicate success false
    And the result attempts count should be 3

  # -----------------------------------------------------------------------
  # Constructor edge case
  # -----------------------------------------------------------------------
  Scenario: AutoDebugAgent constructor raises ValueError when no LLM is provided
    When I try to create an AutoDebugAgent with no LLM
    Then a ValueError should be raised with the missing provider message