{
 "_doc": "IMP-#91 u8 — F2 slot_payload axis. Pins step12_slot_payload.json per_zone structural shape (position / template_id / builder / slot_names / list_slot_counts / dict_slot_sub_counts / string_slot_nonempty) for mdx 01-05. Pins SHAPE not literal content — text edits in MDX won't drift this snapshot, but builder swap / slot rename / missing slot / list-cardinality drift will. __empty__ zones have builder=null and zero slots.",
 "01": [
  {
   "position": "top",
   "template_id": "bim_dx_comparison_table",
   "builder": "compare_table_2col",
   "slot_names": [
    "col_a_label",
    "col_b_label",
    "rows",
    "title"
   ],
   "list_slot_counts": {
    "rows": 2
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "col_a_label": false,
    "col_b_label": false,
    "title": true
   }
  },
  {
   "position": "bottom-left",
   "template_id": "construction_bim_three_usage",
   "builder": "quadrant_flat_slots",
   "slot_names": [
    "_slot_count",
    "category_1_body",
    "category_1_label",
    "category_2_body",
    "category_2_label",
    "category_3_body",
    "category_3_label",
    "title"
   ],
   "list_slot_counts": {
    "category_1_body": 2,
    "category_2_body": 3,
    "category_3_body": 3
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "category_1_label": true,
    "category_2_label": true,
    "category_3_label": true,
    "title": true
   }
  },
  {
   "position": "bottom-right",
   "template_id": "bim_dx_comparison_table",
   "builder": "compare_table_2col",
   "slot_names": [
    "col_a_label",
    "col_b_label",
    "rows",
    "title"
   ],
   "list_slot_counts": {
    "rows": 1
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "col_a_label": false,
    "col_b_label": false,
    "title": true
   }
  }
 ],
 "02": [
  {
   "position": "top",
   "template_id": "three_parallel_requirements",
   "builder": "items_with_role",
   "slot_names": [
    "pillars",
    "title"
   ],
   "list_slot_counts": {
    "pillars": 3
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "title": true
   }
  },
  {
   "position": "bottom",
   "template_id": "three_persona_benefits",
   "builder": "items_with_role",
   "slot_names": [
    "intro_sections",
    "personas",
    "slot_mapping_trace",
    "title"
   ],
   "list_slot_counts": {
    "intro_sections": 2,
    "personas": 3
   },
   "dict_slot_sub_counts": {
    "slot_mapping_trace": {
     "persona_role_labels": 3
    }
   },
   "string_slot_nonempty": {
    "title": true
   }
  }
 ],
 "03": [
  {
   "position": "left",
   "template_id": "three_parallel_requirements",
   "builder": "items_with_role",
   "slot_names": [
    "pillars",
    "title"
   ],
   "list_slot_counts": {
    "pillars": 3
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "title": true
   }
  },
  {
   "position": "right",
   "template_id": "bim_dx_comparison_table",
   "builder": "compare_table_2col",
   "slot_names": [
    "col_a_label",
    "col_b_label",
    "rows",
    "title"
   ],
   "list_slot_counts": {
    "rows": 8
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "col_a_label": false,
    "col_b_label": false,
    "title": true
   }
  }
 ],
 "04": [
  {
   "position": "top",
   "template_id": "pre_construction_model_info_stacked",
   "builder": "quadrant_flat_slots",
   "slot_names": [
    "_slot_count",
    "pill_1_body",
    "pill_1_label",
    "pill_2_body",
    "pill_2_label",
    "pill_3_body",
    "pill_3_label",
    "pill_4_body",
    "pill_4_label",
    "pill_5_body",
    "pill_5_label",
    "title"
   ],
   "list_slot_counts": {
    "pill_1_body": 4,
    "pill_2_body": 4,
    "pill_3_body": 4,
    "pill_4_body": 4,
    "pill_5_body": 4
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "pill_1_label": true,
    "pill_2_label": true,
    "pill_3_label": true,
    "pill_4_label": true,
    "pill_5_label": true,
    "title": true
   }
  },
  {
   "position": "bottom",
   "template_id": "three_parallel_requirements",
   "builder": "items_with_role",
   "slot_names": [
    "pillars",
    "title"
   ],
   "list_slot_counts": {
    "pillars": 2
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "title": true
   }
  }
 ],
 "05": [
  {
   "position": "top",
   "template_id": "three_parallel_requirements",
   "builder": "items_with_role",
   "slot_names": [
    "pillars",
    "title"
   ],
   "list_slot_counts": {
    "pillars": 3
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "title": true
   }
  },
  {
   "position": "bottom",
   "template_id": "three_parallel_requirements",
   "builder": "items_with_role",
   "slot_names": [
    "pillars",
    "title"
   ],
   "list_slot_counts": {
    "pillars": 2
   },
   "dict_slot_sub_counts": {},
   "string_slot_nonempty": {
    "title": true
   }
  }
 ]
}