{
 "_doc": "IMP-91 u10 — F4 layout snapshot (step07 + step08). Pins observed layout decision axes (preset / candidates / override / computation / dynamic flags) + planning geometry (heights_px / widths_px / ratios / col_ratios) + per-zone planning shape (position / min_height_px / frame_cardinality_strict / sub_zones_count / region_layout_candidates). step_status='partial' = schema-lock marker per Step 7/8 note (region-level ratio + count-based v0 marker stays a marker, never silently flipped). layout_override_applied=True ONLY for mdx 03 (project_mdx03_frame_lock 2026-05-15 user lock — axis A vertical-2 override). Source: src/phase_z2_pipeline.py step07/step08 emit; auto_layout_preset=None for mdx 05 single-preset path. drift in heights_px/ratios = content_weight_distribution shift; drift in computation = decision-path swap (regression signal axis distinct from preset).",
 "01": {
  "step7_step_status": "partial",
  "step7_pipeline_path_connected": true,
  "layout_preset": "top-1-bottom-2",
  "auto_layout_preset": "top-1-bottom-2",
  "layout_override_applied": false,
  "zones_count": 3,
  "unit_count": 3,
  "layout_candidates": [
   "top-1-bottom-2",
   "top-2-bottom-1",
   "left-1-right-2",
   "left-2-right-1"
  ],
  "computation": "2d_dynamic_aggregated",
  "dynamic_rows": true,
  "dynamic_cols": true,
  "heights_px": [
   285,
   286
  ],
  "widths_px": [
   562,
   604
  ],
  "ratios": [
   0.487,
   0.489
  ],
  "width_ratios": [
   0.476,
   0.512
  ],
  "step8_step_status": "partial",
  "step8_pipeline_path_connected": true,
  "zone_heights_px_planned": [
   285,
   286
  ],
  "zone_widths_px_planned": [
   562,
   604
  ],
  "zone_col_ratios_planned": [
   0.476,
   0.512
  ],
  "per_zone_layout_shape": [
   {
    "position": "top",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "bottom-left",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "bottom-right",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   }
  ]
 },
 "02": {
  "step7_step_status": "partial",
  "step7_pipeline_path_connected": true,
  "layout_preset": "horizontal-2",
  "auto_layout_preset": "horizontal-2",
  "layout_override_applied": false,
  "zones_count": 2,
  "unit_count": 2,
  "layout_candidates": [
   "horizontal-2",
   "vertical-2"
  ],
  "computation": "min_height_first + content_weight_distribution",
  "dynamic_rows": true,
  "dynamic_cols": false,
  "heights_px": [
   232,
   339
  ],
  "widths_px": [
   1180
  ],
  "ratios": [
   0.397,
   0.579
  ],
  "width_ratios": [
   1.0
  ],
  "step8_step_status": "partial",
  "step8_pipeline_path_connected": true,
  "zone_heights_px_planned": [
   232,
   339
  ],
  "zone_widths_px_planned": [
   1180
  ],
  "zone_col_ratios_planned": [
   1.0
  ],
  "per_zone_layout_shape": [
   {
    "position": "top",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "bottom",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   }
  ]
 },
 "03": {
  "step7_step_status": "partial",
  "step7_pipeline_path_connected": true,
  "layout_preset": "vertical-2",
  "auto_layout_preset": "horizontal-2",
  "layout_override_applied": true,
  "zones_count": 2,
  "unit_count": 2,
  "layout_candidates": [
   "horizontal-2",
   "vertical-2"
  ],
  "computation": "content_weight_distribution_cols",
  "dynamic_rows": false,
  "dynamic_cols": true,
  "heights_px": [
   585
  ],
  "widths_px": [
   571,
   595
  ],
  "ratios": [
   1.0
  ],
  "width_ratios": [
   0.484,
   0.504
  ],
  "step8_step_status": "partial",
  "step8_pipeline_path_connected": true,
  "zone_heights_px_planned": [
   585
  ],
  "zone_widths_px_planned": [
   571,
   595
  ],
  "zone_col_ratios_planned": [
   0.484,
   0.504
  ],
  "per_zone_layout_shape": [
   {
    "position": "left",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "right",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   }
  ]
 },
 "04": {
  "step7_step_status": "partial",
  "step7_pipeline_path_connected": true,
  "layout_preset": "horizontal-2",
  "auto_layout_preset": "horizontal-2",
  "layout_override_applied": false,
  "zones_count": 2,
  "unit_count": 2,
  "layout_candidates": [
   "horizontal-2",
   "vertical-2"
  ],
  "computation": "min_height_first + content_weight_distribution",
  "dynamic_rows": true,
  "dynamic_cols": false,
  "heights_px": [
   241,
   330
  ],
  "widths_px": [
   1180
  ],
  "ratios": [
   0.412,
   0.564
  ],
  "width_ratios": [
   1.0
  ],
  "step8_step_status": "partial",
  "step8_pipeline_path_connected": true,
  "zone_heights_px_planned": [
   241,
   330
  ],
  "zone_widths_px_planned": [
   1180
  ],
  "zone_col_ratios_planned": [
   1.0
  ],
  "per_zone_layout_shape": [
   {
    "position": "top",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "bottom",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   }
  ]
 },
 "05": {
  "step7_step_status": "partial",
  "step7_pipeline_path_connected": true,
  "layout_preset": "horizontal-2",
  "auto_layout_preset": "horizontal-2",
  "layout_override_applied": false,
  "zones_count": 2,
  "unit_count": 2,
  "layout_candidates": [
   "horizontal-2",
   "vertical-2"
  ],
  "computation": "min_height_first + content_weight_distribution",
  "dynamic_rows": true,
  "dynamic_cols": false,
  "heights_px": [
   313,
   258
  ],
  "widths_px": [
   1180
  ],
  "ratios": [
   0.535,
   0.441
  ],
  "width_ratios": [
   1.0
  ],
  "step8_step_status": "partial",
  "step8_pipeline_path_connected": true,
  "zone_heights_px_planned": [
   313,
   258
  ],
  "zone_widths_px_planned": [
   1180
  ],
  "zone_col_ratios_planned": [
   1.0
  ],
  "per_zone_layout_shape": [
   {
    "position": "top",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   },
   {
    "position": "bottom",
    "min_height_px": null,
    "frame_cardinality_strict": null,
    "sub_zones_count": 0,
    "region_layout_candidates": [
     "region-single"
    ]
   }
  ]
 }
}