fixture_id: 01_cross_phase_abstract_plus_lit
expected_routing_class: clarify
expected_destination: clarification_only
escape_hatch_applied: false
notes: |
  Abstract (Phase 4 artifact) + literature (Phase 2 artifact) = cross-phase materials
  spanning ≥ 2 phases without explicit skill invocation. Per Routing Discipline Step 2,
  must clarify with a-d options. This is the exact #133 root-cause scenario.
