Feature: Reactive config parser coverage
  As a developer
  I want reactive config parsing paths exercised
  So that uncovered lines are validated

  Background:
    Given a temporary directory for reactive config parsing

  Scenario: Parse combined configs with merges, routes, and pipelines
    Given reactive config files covering merges, routes, and pipelines
    When I parse the reactive config files
    Then the merged reactive config should preserve agents and replacements
    And stream and graph routes should be built with defaults and bridges
    And reactive config should include merges splits pipelines and templates

  Scenario: Interpolate environment variables with defaults
    Given a reactive config file with environment placeholders
    And environment variables are set for interpolation
    When I parse the reactive config files
    Then environment placeholders should resolve using values and defaults

  Scenario: Raise error for missing required environment variable
    Given a reactive config file with a required environment placeholder
    When I parse the reactive config files expecting failure
    Then a configuration error should be raised for the missing variable