Feature: Platform Presence Scan
  API-first discovery across 10 public book platforms.

  Scenario: Kindle-only Amazon book finds Amazon and Goodreads
    Given a sample book "amazon_kindle"
    When platform presence is scanned
    Then "amazon" should be verified with a product URL
    And "goodreads" should be verified with a product URL
    And no platform should be verified using only a search page URL

  Scenario: ISBN book finds most retailers
    Given a sample book "isbn_hardcover"
    When platform presence is scanned
    Then "amazon" should be verified with a product URL
    And "open_library" should be verified with a product URL
    And at least 5 platforms should be listed

  Scenario: Platform list matches the 10 supported retailers
    When I load the scored platform list
    Then there should be exactly 10 platforms
    And the platform list should include "google_books"
    And the platform list should include "open_library"