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Documentation Index

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User Prompt

“What’s at grid B-3?”

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Tool Call Sequence

1

Query features at the grid intersection

Call: Query
{
  "entity": "feature",
  "project_id": "proj_oak",
  "grid_intersection": "B-3",
  "include": ["parent_chain"]
}
Response:
{
  "count": 9,
  "items": [
    {
      "id": "ftr_rm102",
      "type": "room",
      "label": "102",
      "bounds": { "type": "polygon", "points": [[280, 400], [450, 400], [450, 620], [280, 620]] },
      "confidence": 0.93,
      "metadata": { "area_sf": 340 },
      "parent_chain": [
        { "entity_type": "block", "id": "blk_a101_plan", "type": "Plan", "identifier": "1" },
        { "entity_type": "sheet", "id": "sh_a101", "sheet_number": "A-101", "discipline": "A" },
        { "entity_type": "drawing", "id": "dr_arch_b", "name": "Arch Set Rev B" }
      ],
      "relations": []
    },
    {
      "id": "ftr_beam_01",
      "type": "beam",
      "label": "W16x40",
      "bounds": { "type": "bbox", "xmin": 300, "ymin": 480, "xmax": 420, "ymax": 490 },
      "confidence": 0.91,
      "metadata": { "designation": "W16x40", "elevation_top": "11'-2\"", "elevation_bottom": "9'-10\"" },
      "parent_chain": [
        { "entity_type": "block", "id": "blk_s201_plan", "type": "Plan", "identifier": "1" },
        { "entity_type": "sheet", "id": "sh_s201", "sheet_number": "S-201", "discipline": "S" },
        { "entity_type": "drawing", "id": "dr_struct", "name": "Structural Set" }
      ],
      "relations": []
    },
    {
      "id": "ftr_duct_01",
      "type": "duct",
      "label": "24x12 SA",
      "bounds": { "type": "polyline", "points": [[280, 485], [340, 485], [420, 485]] },
      "confidence": 0.88,
      "metadata": { "size": "24x12", "system": "SA", "elevation_cl": "11'-0\"" },
      "parent_chain": [
        { "entity_type": "block", "id": "blk_m201_plan", "type": "Plan", "identifier": "1" },
        { "entity_type": "sheet", "id": "sh_m201", "sheet_number": "M-201", "discipline": "M" },
        { "entity_type": "drawing", "id": "dr_mech", "name": "Mechanical Set" }
      ],
      "relations": []
    },
    {
      "id": "ftr_sprk_01",
      "type": "sprinkler_head",
      "label": null,
      "confidence": 0.90,
      "parent_chain": [
        { "entity_type": "block", "id": "blk_fp201_plan", "type": "Plan", "identifier": "1" },
        { "entity_type": "sheet", "id": "sh_fp201", "sheet_number": "FP-201", "discipline": "FP" },
        { "entity_type": "drawing", "id": "dr_fp", "name": "Fire Protection Set" }
      ],
      "relations": []
    }
  ]
}
What the agent learns: 9 features from 4 disciplines overlap at grid B-3. The parent_chain on each feature tells the agent which sheet and discipline it came from, enabling cross-discipline grouping without extra queries.

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Agent Response

Here’s what’s at grid B-3 across all disciplines: Architectural (A-101): Room 102 (340 SF) Structural (S-201): W16x40 beam (top: 11’-2”, bottom: 9’-10”) Mechanical (M-201): 24x12 supply air duct (centerline: 11’-0”) Fire Protection (FP-201): Sprinkler head Note: The SA duct bottom (10’-6”) overlaps with the beam top (11’-2”) — this may be a coordination issue. Want me to investigate further?

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Summary

MetricValue
Tool calls1
Tools usedQuery
Key techniqueThe grid_intersection filter handles all the spatial math. The backend resolves grid line positions across disciplines. parent_chain provides discipline context so the agent can group results by trade.