Feature: Curator's X-ray of the selection model
  As a curator
  I want to turn the installation's dials against a representative catalog and see
  the full ranked pool the nearest-match algorithm picks from
  So that I can judge whether the tagging rubric and selection surface fitting pieces

  Background:
    Given the simulator is loaded with the synthetic fixture catalog
    And the fixture catalog spans the brain plane and the mood plane across all content modes

  Scenario: A pick is always accompanied by its candidate pool
    When I set the mode to "av" and the dials to left=1 right=3 dark=4 light=1
    Then a piece is picked
    And the ranked pool is shown nearest-first with each candidate's distance
    And the picked piece is the rank-1 candidate in the pool

  Scenario: Turning Dark up while Light stays low pulls the pick toward somber pieces
    Given the mode is "av" and the dials are left=2 right=2 dark=0 light=0
    When I raise the Dark dial from 0 to 4
    Then the picked piece's dark coordinate is higher than before
    And the pool's nearest candidates cluster toward the high-dark / low-light region

  Scenario: Turning a dial moves the knob point on the coordinate map
    Given the mode is "av"
    When I change any of the Left, Right, Dark, or Light dials
    Then the knob point on the brain or mood grid map moves to the new coordinate
    And the candidate dots reflect the new neighborhood

  Scenario: None mode is the void / rest state
    When I set the mode to "none"
    Then no piece is picked
    And the pool is empty
    And the screen shows the void / rest state

  Scenario: A+V mode falls back to audio and video when av records are thin
    Given the fixture catalog has fewer than the pool size of native "av" records near the knob point
    When I set the mode to "av"
    Then the pool includes "audio" and "video" records so it is not starved

  Scenario Outline: Each content mode restricts the pool to eligible records
    When I set the mode to "<mode>"
    Then every candidate in the pool is eligible for "<mode>"

    Examples:
      | mode  |
      | audio |
      | video |
      | av    |
