Feature: Resource CLI coverage boost for remaining uncovered lines
  As a developer
  I want edge-case paths in resource.py thoroughly tested
  So that the line-rate and branch-rate improve beyond 0.93 / 0.88

  # ---- _get_registry_service (lines 79-81) ----

  Scenario: _get_registry_service delegates to the DI container
    Given the DI container is mocked for resource registry
    When _get_registry_service is called directly
    Then the returned service should be the mock registry service

  # ---- type_add --update re-raises ValidationError (line 181) ----

  Scenario: type_add --update re-raises ValidationError whose message lacks "already exists"
    Given a mock resource service that raises a non-already-exists ValidationError on register_type
    When I invoke type add with update flag via CliRunner
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "Validation error"

  # ---- type_add FileNotFoundError (lines 193-195) ----

  Scenario: type_add catches FileNotFoundError from service
    Given a mock resource service that raises FileNotFoundError on register_type
    When I invoke type add with a dummy config via CliRunner
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "Config file not found"

  # ---- type_remove confirm declined (lines 234-236) ----

  Scenario: type_remove aborts when user declines confirmation prompt
    Given a mock resource service with a removable custom type
    When I invoke type remove without --yes and answer no via CliRunner
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "Aborted"

  # ---- type_remove NotFoundError from service (lines 263-265) ----

  Scenario: type_remove aborts when service.remove_type raises NotFoundError
    Given a mock resource service whose remove_type raises NotFoundError
    When I invoke type remove with --yes via CliRunner for the phantom type
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "Resource type not found"

  # ---- type_remove ValidationError from service (lines 269-271) ----

  Scenario: type_remove aborts when service.remove_type raises ValidationError
    Given a mock resource service whose remove_type raises ValidationError
    When I invoke type remove with --yes via CliRunner for the failing type
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "Error:"

  # ---- resource_remove edge_count > 0 (lines 653-658) ----

  Scenario: resource_remove aborts when resource has edges
    Given a mock resource service whose session reports edges on the resource
    When I invoke resource remove with --yes via CliRunner for the edged resource
    Then the CliRunner exit code should be non-zero
    And the CliRunner output should contain "edge(s) still reference it"

  # ---- resource_remove generic Exception rollback (lines 668-672) ----

  Scenario: resource_remove rolls back session on unexpected exception
    Given a mock resource service whose session delete raises a generic exception for resource
    When I invoke resource remove with --yes via CliRunner for the failing resource
    Then the CliRunner exit code should be non-zero
    And the mock session rollback should have been called for resource remove