A–B–C ORIENTATION-SENSITIVE BRIDGE MANIFEST
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Script version: 1.0.0

INPUTS
Dataset A: C:\Users\igorc\OneDrive\Desktop\UNNS_SUBSTRATE(desktop)\TRANSFER\Bulk_2\REGIME_SYNTHESIS\Cosmological Boundary Routing\cosmological_boundary_routing\A_classical_friedmann\generated_trajectory\validated\classical_friedmann_approach_validated.csv
Dataset B: C:\Users\igorc\OneDrive\Desktop\UNNS_SUBSTRATE(desktop)\TRANSFER\Bulk_2\REGIME_SYNTHESIS\Cosmological Boundary Routing\cosmological_boundary_routing\B_lqc_bounce\canonical\ladder\lqc_bounce_response_path_preliminary.csv
Dataset C: C:\Users\igorc\OneDrive\Desktop\UNNS_SUBSTRATE(desktop)\TRANSFER\Bulk_2\REGIME_SYNTHESIS\Cosmological Boundary Routing\cosmological_boundary_routing\C_planck_lcdm\generated_trajectory\validated\planck_lcdm_trajectory_validated.csv

OUTPUTS
Bridge intervals: C:\Users\igorc\OneDrive\Desktop\UNNS_SUBSTRATE(desktop)\TRANSFER\Bulk_2\REGIME_SYNTHESIS\Cosmological Boundary Routing\cosmological_boundary_routing\ABC_bridge\outputs\ABC_orientation_sensitive_bridge.csv
Bridge summary: C:\Users\igorc\OneDrive\Desktop\UNNS_SUBSTRATE(desktop)\TRANSFER\Bulk_2\REGIME_SYNTHESIS\Cosmological Boundary Routing\cosmological_boundary_routing\ABC_bridge\outputs\ABC_orientation_sensitive_bridge_summary.csv

PURPOSE
The bridge restores orientation information discarded by sorted scalar ladders and magnitude-only alpha metrics.

PRIMARY SIGNED QUANTITIES
- signed Delta ln(a)
- signed H flow
- signed density flow
- signed curvature flow
- signed provisional-margin flow
- signed approach to or recession from the surface

ROUTE CLASSES
A: terminal_boundary_approach
B: finite_turning_surface_route
C: boundary_recession_expansion

CORE TEST
A should approach a terminal boundary with decreasing margin.
B should approach a finite turning surface, cross it, and recede after reversal.
C should expand away from the early boundary regime.

INTERPRETIVE LIMITS
- boundary_margin_candidate remains provisional.
- Dataset A and C surface-distance fields depend on available trajectory columns and are not yet a final common metric.
- Dataset B uses x_bounce_distance as its turning-surface coordinate.
- The bridge is an orientation-sensitive comparison layer, not yet the final canonical boundary-routing proof.
