Regime Clustering

This first-pass clustering uses standardized ladder metrics derived from the frozen checkpoint sequence summary. Inputs are portal-hit density, throat-event density, crossings per pixel, segments per crossing, and OPL mean.

Cluster Table

Checkpoint	Cluster	portal_hit_density	throat_event_density	crossings_per_pixel	segments_per_crossing	OPL mean
mouth	near-side/throat	0.1465	0.0969	0.6495	153.2590	9.9599
mouth_to_throat_approach	near-side/throat	0.1633	0.1048	0.6987	139.6225	9.7287
throat	near-side/throat	0.1750	0.1139	0.7479	128.1728	9.5078
post_throat_backstep_01	bridge	0.0964	0.0555	0.2098	366.0292	7.5908
post_throat_exit_approach	far-side	0.1798	0.2111	1.6544	50.3105	8.1171
exit_lookback	far-side	0.2557	0.2198	1.4200	60.9614	8.4337

Summary

• The clustering separates a near-side/throat family, a singleton bridge state, and a far-side family.
• The bridge cluster is isolated by low interaction density, low OPL mean, and extremely high segments per crossing.
• The far-side cluster groups the two highest-interaction checkpoints despite their different portal coverage profiles.

Figure: regime_clustering.png