Feature: Validation attach uses --key value named option format for extra arguments
  As a CleverAgents user
  I want the "agents validation attach" command to accept extra arguments
  as named options in the format "--key value" (e.g. "--coverage-threshold 90")
  So that the CLI is consistent with the specification and other commands

  Background:
    Given a validation attach type guard test runner
    And a validation attach type guard mocked environment

  # --- Spec-compliant named option format ---

  Scenario: Attach accepts a single named option argument
    Given a genuine validation "local/run-tests" is registered with tool_type "validation"
    When I invoke validation attach with named option "--coverage-threshold" "90" for "local/run-tests" to "local/api-repo"
    Then the validation attach should succeed

  Scenario: Attach accepts a named option with hyphenated key
    Given a genuine validation "local/lint-check" is registered with tool_type "validation"
    When I invoke validation attach with named option "--max-line-length" "120" for "local/lint-check" to "git-checkout/my-repo"
    Then the validation attach should succeed

  Scenario: Attach accepts multiple named option arguments
    Given a genuine validation "local/coverage-check" is registered with tool_type "validation"
    When I invoke validation attach with named options "--threshold" "80" "--strict" "true" for "local/coverage-check" to "local/api-repo"
    Then the validation attach should succeed

  # --- Rejection of old positional key=value format ---

  Scenario: Attach rejects positional key=value argument format
    Given a genuine validation "local/run-tests" is registered with tool_type "validation"
    When I invoke validation attach with positional arg "coverage_threshold=90" for "local/run-tests" to "local/api-repo"
    Then the validation attach should be rejected
    And the rejection output should contain "Invalid argument format"

  Scenario: Attach rejects bare positional argument without equals sign
    Given a genuine validation "local/run-tests" is registered with tool_type "validation"
    When I invoke validation attach with positional arg "badarg" for "local/run-tests" to "local/api-repo"
    Then the validation attach should be rejected

  # --- Named option missing value ---

  Scenario: Attach rejects named option without a value
    Given a genuine validation "local/run-tests" is registered with tool_type "validation"
    When I invoke validation attach with dangling option "--coverage-threshold" for "local/run-tests" to "local/api-repo"
    Then the validation attach should be rejected
    And the rejection output should contain "Missing value"