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            "locked": true,
            "door": {
              "clearWidthM": 1.8,
              "swing": "inward",
              "accessible": true,
              "clearance": {
                "side": "left",
                "depthM": 1.5,
                "latchSideM": 0.45
              }
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 14.1,
                "y": 0.1
              },
              "end": {
                "x": 15.9,
                "y": 0.1
              },
              "width": 0.2
            },
            "locks": [
              {
                "id": "lock-obj-door-south-access-position",
                "objectId": "obj-door-south-access",
                "type": "position",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-door-south-access-rotation",
                "objectId": "obj-door-south-access",
                "type": "rotation",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-door-south-access-dimension",
                "objectId": "obj-door-south-access",
                "type": "dimension",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-door-south-access-deletion",
                "objectId": "obj-door-south-access",
                "type": "deletion",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-door-south-access-role",
                "objectId": "obj-door-south-access",
                "type": "role",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              }
            ]
          },
          {
            "id": "obj-seating-west",
            "kind": "seating_section",
            "label": "West seating",
            "layer": "furniture",
            "elevationM": 0,
            "locked": false,
            "templateRef": {
              "kind": "inventory-item-template",
              "templateId": "inventory-template-banquet-chair",
              "version": "1.0.0"
            },
            "inventoryCount": 200,
            "capacity": 200,
            "accessibility": {
              "destination": true,
              "accessibleSeats": 4,
              "companionSeats": 4,
              "accessibleSeatSampleIds": [
                "seat-west-01",
                "seat-west-04"
              ]
            },
            "sightline": {
              "samples": [
                {
                  "id": "seat-west-01",
                  "point": {
                    "x": 9,
                    "y": 6
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-02",
                  "point": {
                    "x": 9,
                    "y": 9
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-03",
                  "point": {
                    "x": 9,
                    "y": 12
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-04",
                  "point": {
                    "x": 9,
                    "y": 15
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-05",
                  "point": {
                    "x": 13,
                    "y": 6
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-06",
                  "point": {
                    "x": 13,
                    "y": 9
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-07",
                  "point": {
                    "x": 13,
                    "y": 12
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-west-08",
                  "point": {
                    "x": 13,
                    "y": 15
                  },
                  "eyeHeightM": 1.2
                }
              ]
            },
            "footprint": {
              "kind": "rectangle",
              "center": {
                "x": 11,
                "y": 10
              },
              "width": 6,
              "depth": 14,
              "rotationDegrees": 0
            },
            "locks": []
          },
          {
            "id": "obj-seating-east",
            "kind": "seating_section",
            "label": "East seating",
            "layer": "furniture",
            "elevationM": 0,
            "locked": false,
            "templateRef": {
              "kind": "inventory-item-template",
              "templateId": "inventory-template-banquet-chair",
              "version": "1.0.0"
            },
            "inventoryCount": 200,
            "capacity": 200,
            "accessibility": {
              "destination": true,
              "accessibleSeats": 4,
              "companionSeats": 4,
              "accessibleSeatSampleIds": [
                "seat-east-01",
                "seat-east-05"
              ]
            },
            "sightline": {
              "samples": [
                {
                  "id": "seat-east-01",
                  "point": {
                    "x": 18,
                    "y": 5
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-02",
                  "point": {
                    "x": 20,
                    "y": 7
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-03",
                  "point": {
                    "x": 22,
                    "y": 9
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-04",
                  "point": {
                    "x": 24,
                    "y": 11
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-05",
                  "point": {
                    "x": 23.9,
                    "y": 16
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-06",
                  "point": {
                    "x": 24.48,
                    "y": 16.2
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-07",
                  "point": {
                    "x": 25.06,
                    "y": 16.4
                  },
                  "eyeHeightM": 1.2
                },
                {
                  "id": "seat-east-08",
                  "point": {
                    "x": 25.553,
                    "y": 16.57
                  },
                  "eyeHeightM": 1.2
                }
              ]
            },
            "footprint": {
              "kind": "rectangle",
              "center": {
                "x": 22,
                "y": 10.5
              },
              "width": 12,
              "depth": 15,
              "rotationDegrees": 0
            },
            "locks": []
          },
          {
            "id": "obj-restroom-accessible",
            "kind": "accessible_restroom",
            "label": "Accessible restroom",
            "layer": "architecture",
            "elevationM": 0,
            "locked": true,
            "accessibility": {
              "destination": true
            },
            "occupancy": {
              "excludesUsableArea": true
            },
            "footprint": {
              "kind": "rectangle",
              "center": {
                "x": 15.8,
                "y": 5
              },
              "width": 1.6,
              "depth": 2,
              "rotationDegrees": 0
            },
            "locks": [
              {
                "id": "lock-obj-restroom-accessible-position",
                "objectId": "obj-restroom-accessible",
                "type": "position",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-restroom-accessible-rotation",
                "objectId": "obj-restroom-accessible",
                "type": "rotation",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-restroom-accessible-dimension",
                "objectId": "obj-restroom-accessible",
                "type": "dimension",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-restroom-accessible-deletion",
                "objectId": "obj-restroom-accessible",
                "type": "deletion",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              },
              {
                "id": "lock-obj-restroom-accessible-role",
                "objectId": "obj-restroom-accessible",
                "type": "role",
                "source": "venue-template",
                "reasonCode": "venue-infrastructure",
                "authorId": "venue-template",
                "active": true
              }
            ]
          },
          {
            "id": "obj-route-main",
            "kind": "corridor",
            "label": "Main access spine",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "templateRef": {
              "kind": "room-template",
              "templateId": "room-template-harborview-main-hall",
              "templateObjectId": "roomobj-main-route",
              "version": "1.0.0"
            },
            "templateOverrides": [
              "label"
            ],
            "route": {
              "direction": "bidirectional",
              "accessible": true,
              "purpose": "primary-access"
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 15,
                "y": 0.5
              },
              "end": {
                "x": 15,
                "y": 10
              },
              "width": 1.219
            },
            "locks": []
          },
          {
            "id": "obj-route-stage",
            "kind": "service_lane",
            "label": "Stage route",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "route": {
              "direction": "bidirectional",
              "accessible": true,
              "purpose": "stage-access"
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 15,
                "y": 10
              },
              "end": {
                "x": 7,
                "y": 10
              },
              "width": 1.219
            },
            "locks": []
          },
          {
            "id": "obj-route-seating-west",
            "kind": "aisle",
            "label": "West seating route",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "route": {
              "direction": "bidirectional",
              "accessible": true,
              "purpose": "seating-access"
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 15,
                "y": 10
              },
              "end": {
                "x": 14,
                "y": 10
              },
              "width": 1.219
            },
            "locks": []
          },
          {
            "id": "obj-route-seating-east",
            "kind": "aisle",
            "label": "East seating route",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "route": {
              "direction": "bidirectional",
              "accessible": true,
              "purpose": "seating-access"
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 15,
                "y": 10
              },
              "end": {
                "x": 16,
                "y": 10
              },
              "width": 1.219
            },
            "locks": []
          },
          {
            "id": "obj-route-exit-east",
            "kind": "accessible_route",
            "label": "East exit route",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "route": {
              "direction": "bidirectional",
              "accessible": true,
              "purpose": "exit-access"
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 15,
                "y": 10
              },
              "end": {
                "x": 29.9,
                "y": 10
              },
              "width": 1.219
            },
            "locks": []
          },
          {
            "id": "obj-restricted-production",
            "kind": "restricted_zone",
            "label": "Production clearance",
            "layer": "safety",
            "elevationM": 0,
            "locked": false,
            "templateRef": {
              "kind": "room-template",
              "templateId": "room-template-harborview-main-hall",
              "templateObjectId": "roomobj-production-zone",
              "version": "1.0.0"
            },
            "templateOverrides": [
              "occupancy"
            ],
            "occupancy": {
              "excludesUsableArea": true
            },
            "restriction": {
              "access": "staff-only",
              "reasonCode": "production-clearance",
              "blocksPlacement": true
            },
            "footprint": {
              "kind": "rectangle",
              "center": {
                "x": 4,
                "y": 18
              },
              "width": 6,
              "depth": 2,
              "rotationDegrees": 0
            },
            "locks": []
          },
          {
            "id": "obj-route-staff-service",
            "kind": "service_lane",
            "label": "Staff service route",
            "layer": "access",
            "elevationM": 0,
            "locked": false,
            "route": {
              "direction": "bidirectional",
              "accessible": false,
              "purpose": "staff-only",
              "staffOnly": true
            },
            "footprint": {
              "kind": "line",
              "start": {
                "x": 25,
                "y": 5.5
              },
              "end": {
                "x": 28,
                "y": 1.5
              },
              "width": 1
            },
            "locks": []
          },
          {
            "id": "obj-post-entrance",
            "kind": "staff_post",
            "label": "Entrance post",
            "layer": "annotations",
            "elevationM": 0,
            "locked": false,
            "staffPost": {
              "coverageZoneObjectIds": [
                "obj-accessible-entrance-south"
              ],
              "assignments": [
                {
                  "shiftId": "shift-a",
                  "roleId": "role-security",
                  "count": 2
                },
                {
                  "shiftId": "shift-b",
                  "roleId": "role-security",
                  "count": 2
                }
              ]
            },
            "footprint": {
              "kind": "circle",
              "center": {
                "x": 12.5,
                "y": 2.5
              },
              "radius": 0.2
            },
            "locks": []
          },
          {
            "id": "obj-post-exit",
            "kind": "staff_post",
            "label": "Exit post",
            "layer": "annotations",
            "elevationM": 0,
            "locked": false,
            "staffPost": {
              "coverageZoneObjectIds": [
                "obj-fire-exit-east"
              ],
              "assignments": [
                {
                  "shiftId": "shift-a",
                  "roleId": "role-security",
                  "count": 1
                },
                {
                  "shiftId": "shift-b",
                  "roleId": "role-security",
                  "count": 1
                }
              ]
            },
            "footprint": {
              "kind": "circle",
              "center": {
                "x": 27.5,
                "y": 12.5
              },
              "radius": 0.2
            },
            "locks": []
          },
          {
            "id": "obj-post-access",
            "kind": "staff_post",
            "label": "Access post",
            "layer": "annotations",
            "elevationM": 0,
            "locked": false,
            "staffPost": {
              "coverageZoneObjectIds": [
                "obj-route-main"
              ],
              "assignments": [
                {
                  "shiftId": "shift-a",
                  "roleId": "role-access-steward",
                  "count": 1
                },
                {
                  "shiftId": "shift-b",
                  "roleId": "role-access-steward",
                  "count": 1
                }
              ]
            },
            "footprint": {
              "kind": "circle",
              "center": {
                "x": 16.5,
                "y": 3
              },
              "radius": 0.2
            },
            "locks": []
          },
          {
            "id": "obj-post-stage",
            "kind": "staff_post",
            "label": "Stage post",
            "layer": "annotations",
            "elevationM": 0,
            "locked": false,
            "staffPost": {
              "coverageZoneObjectIds": [
                "obj-stage-west"
              ],
              "assignments": [
                {
                  "shiftId": "shift-a",
                  "roleId": "role-stage-manager",
                  "count": 1
                },
                {
                  "shiftId": "shift-b",
                  "roleId": "role-stage-manager",
                  "count": 1
                }
              ]
            },
            "footprint": {
              "kind": "circle",
              "center": {
                "x": 7.5,
                "y": 16.5
              },
              "radius": 0.2
            },
            "locks": []
          },
          {
            "id": "obj-post-catering",
            "kind": "staff_post",
            "label": "Service post",
            "layer": "annotations",
            "elevationM": 0,
            "locked": false,
            "staffPost": {
              "coverageZoneObjectIds": [
                "obj-refreshment-east"
              ],
              "assignments": [
                {
                  "shiftId": "shift-a",
                  "roleId": "role-service-lead",
                  "count": 1
                },
                {
                  "shiftId": "shift-b",
                  "roleId": "role-service-lead",
                  "count": 1
                }
              ]
            },
            "footprint": {
              "kind": "circle",
              "center": {
                "x": 25,
                "y": 6
              },
              "radius": 0.2
            },
            "locks": []
          }
        ],
        "constraints": [
          {
            "id": "constraint-protected-objects",
            "checkId": "check-locked-objects",
            "evaluator": "protected_objects_unchanged",
            "label": "Locked objects",
            "category": "protection",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "objectIds": [
                "obj-stage-west",
                "obj-fire-exit-east",
                "obj-column-southwest",
                "obj-accessible-entrance-south",
                "obj-door-south-access",
                "obj-restroom-accessible"
              ]
            },
            "remediation": "Remove Changes that target protected venue objects.",
            "waivable": false
          },
          {
            "id": "constraint-accessible-route",
            "checkId": "check-accessible-route",
            "evaluator": "accessible_route_graph",
            "label": "Accessible route",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumWidthM": 1.8,
              "requireConnected": true
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Connect every required destination and increase the minimum clear route width.",
            "waivable": false
          },
          {
            "id": "constraint-turning-clearance",
            "checkId": "check-turning-clearance",
            "evaluator": "turning_clearance",
            "label": "Turning clearance",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumDiameterM": 1.5
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Increase the clear turning diameter at route junctions.",
            "waivable": false
          },
          {
            "id": "constraint-accessible-seating",
            "checkId": "check-accessible-seating",
            "evaluator": "accessible_seating",
            "label": "Accessible seating",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumSeats": 8,
              "minimumSections": 2,
              "requireCompanionAdjacency": true
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Add distributed accessible and companion seating positions.",
            "waivable": false
          },
          {
            "id": "constraint-accessible-seating-sightlines",
            "checkId": "check-accessible-seating-sightlines",
            "evaluator": "accessible_seating_sightlines",
            "label": "Accessible seating sightlines",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumCoverageRatio": 1,
              "minimumSectionCoverageRatio": 1
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Move obstructions or relocate accessible seating samples until every section has a clear focal-point ray.",
            "waivable": false
          },
          {
            "id": "constraint-door-clearance",
            "checkId": "check-door-clearance",
            "evaluator": "door_clearance",
            "label": "Door clearance",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumClearWidthM": 0.915
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Clear the maneuvering zone and restore the required accessible door width.",
            "waivable": false
          },
          {
            "id": "constraint-temporary-ramps",
            "checkId": "check-temporary-ramps",
            "evaluator": "temporary_ramp",
            "label": "Temporary ramps",
            "category": "accessibility",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumSlopeRatio": 12,
              "minimumClearWidthM": 0.915,
              "minimumLandingLengthM": 1.525,
              "minimumEdgeProtectionHeightM": 0.1,
              "requireHandrails": true
            },
            "policy": {
              "jurisdiction": "US venue policy",
              "source": "Harborview Access Standard 2026",
              "effectiveDate": "2026-01-01"
            },
            "remediation": "Increase ramp run, clear width, landing, or edge protection and add required handrails.",
            "waivable": false
          },
          {
            "id": "constraint-capacity",
            "checkId": "check-capacity",
            "evaluator": "occupancy_capacity",
            "label": "Capacity",
            "category": "capacity",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumAttendeeCapacity": 400,
              "maximumOperationalLoad": 450
            },
            "remediation": "Restore sufficient placed capacity or reduce the operational load.",
            "waivable": false
          },
          {
            "id": "constraint-sightlines",
            "checkId": "check-sightlines",
            "evaluator": "sightline_raycast",
            "label": "Sightline coverage",
            "category": "sightlines",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "minimumCoverageRatio": 0.85,
              "maximumViewingDistanceM": 30,
              "maximumBlockedSectionRatio": 0.15
            },
            "remediation": "Move opaque obstructions or revise the seating section.",
            "waivable": false
          },
          {
            "id": "constraint-production-readiness",
            "checkId": "check-production-readiness",
            "evaluator": "production_readiness",
            "label": "Production readiness",
            "category": "production",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "maximumFailedChecks": 0
            },
            "remediation": "Resolve throw, visibility, audio, camera, cable, circuit, rigging, or inventory failures.",
            "waivable": false
          },
          {
            "id": "constraint-catering-readiness",
            "checkId": "check-catering-readiness",
            "evaluator": "catering_readiness",
            "label": "Catering readiness",
            "category": "catering",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "maximumFailedChecks": 0
            },
            "remediation": "Resolve service capacity, queue, separation, access, support, or replenishment failures.",
            "waivable": false
          },
          {
            "id": "constraint-emergency-readiness",
            "checkId": "check-emergency-readiness",
            "evaluator": "emergency_readiness",
            "label": "Emergency readiness",
            "category": "emergency",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "maximumStructuralFailures": 0
            },
            "remediation": "Restore exit, assembly, emergency access, fire equipment, first-aid, and command-post readiness.",
            "waivable": false
          },
          {
            "id": "constraint-peak-congestion",
            "checkId": "check-circulation",
            "evaluator": "circulation_graph",
            "label": "Peak congestion",
            "category": "circulation",
            "severity": "error",
            "scope": {
              "kind": "plan"
            },
            "parameters": {
              "maximumCongestionIndex": 80
            },
            "remediation": "Increase circulation width, reconnect occupied zones, or reduce phase demand.",
            "waivable": false
          }
        ],
        "metrics": {
          "accessibleRouteWidthFt": 4,
          "attendeeCapacity": 400,
          "sightlineCoverage": 0.72,
          "peakCongestionIndex": 100,
          "serviceLaneWidthFt": 0,
          "queueBufferSqFt": 0,
          "eastRouteClear": false
        },
        "emergencyReviews": []
      },
      "brief": {
        "id": "brief-summit-forward-2026",
        "eventName": "SummitForward 2026",
        "date": "2026-09-12",
        "timezone": "America/New_York",
        "venueId": "venue-harborview-main-hall",
        "roomId": "room-harborview-main-hall",
        "attendeeTarget": 400,
        "occupancyMode": "theater",
        "schedule": {
          "startAt": "2026-09-12T08:00:00-04:00",
          "endAt": "2026-09-12T16:00:00-04:00",
          "timezone": "America/New_York"
        },
        "requirements": [
          {
            "id": "req-theater-seating",
            "category": "seating",
            "label": "Theater style for keynotes",
            "priority": "high",
            "owner": "planning",
            "status": "confirmed",
            "measurable": true,
            "constraintIds": [
              "constraint-capacity"
            ],
            "evidenceRefs": []
          },
          {
            "id": "req-west-stage",
            "category": "production",
            "label": "Stage on west wall",
            "priority": "high",
            "owner": "production",
            "status": "confirmed",
            "measurable": false,
            "constraintIds": [],
            "evidenceRefs": [
              "obj-stage-west"
            ]
          },
          {
            "id": "req-breakout-access",
            "category": "circulation",
            "label": "Breakout access after keynotes",
            "priority": "medium",
            "owner": "operations",
            "status": "open",
            "measurable": false,
            "constraintIds": [],
            "evidenceRefs": []
          },
          {
            "id": "req-accessible-route",
            "category": "accessibility",
            "label": "Keep accessible route clear",
            "priority": "critical",
            "owner": "access",
            "status": "confirmed",
            "measurable": true,
            "constraintIds": [
              "constraint-accessible-route"
            ],
            "evidenceRefs": []
          },
          {
            "id": "req-av-control",
            "category": "production",
            "label": "Maintain AV control position",
            "priority": "high",
            "owner": "production",
            "status": "confirmed",
            "measurable": true,
            "constraintIds": [
              "constraint-production-readiness",
              "constraint-sightlines"
            ],
            "evidenceRefs": [
              "obj-av-desk",
              "obj-projector-center",
              "obj-screen-stage"
            ]
          },
          {
            "id": "req-catering-rear",
            "category": "catering",
            "label": "Catering at back of room",
            "priority": "medium",
            "owner": "catering",
            "status": "confirmed",
            "measurable": true,
            "constraintIds": [
              "constraint-catering-readiness"
            ],
            "evidenceRefs": [
              "obj-bar-east",
              "obj-kitchen-northeast",
              "obj-refreshment-east"
            ]
          },
          {
            "id": "req-emergency-readiness",
            "category": "emergency",
            "label": "Emergency plan readiness",
            "priority": "critical",
            "owner": "safety",
            "status": "confirmed",
            "measurable": true,
            "constraintIds": [
              "constraint-emergency-readiness"
            ],
            "evidenceRefs": [
              "obj-assembly-east",
              "obj-command-post-north",
              "obj-fire-exit-east",
              "obj-fire-exit-north"
            ]
          }
        ]
      },
      "proposal": {
        "id": "proposal-32-a",
        "baseVersion": "3.2",
        "revision": 1,
        "status": "review",
        "goal": "Restore accessibility and improve sightlines",
        "waivers": [],
        "validation": null,
        "changes": [
          {
            "id": "chg-seat-center-shift",
            "number": 1,
            "title": "Shift center seating 6 ft forward",
            "shortTitle": "Seating +6 ft",
            "metrics": [
              [
                "Service lane",
                "+6 ft"
              ],
              [
                "Capacity",
                "400"
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            ],
            "effects": {
              "serviceLaneWidthFt": 6
            }
          },
          {
            "id": "chg-center-aisle-width",
            "number": 2,
            "title": "Widen center aisle to 6 ft",
            "shortTitle": "Aisle 6 ft",
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              [
                "Accessible route",
                "1.829 m"
              ],
              [
                "Peak congestion",
                "66.5"
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            ],
            "targetObjectIds": [
              "obj-route-main",
              "obj-route-stage",
              "obj-route-seating-west",
              "obj-route-seating-east",
              "obj-route-exit-east"
            ],
            "effects": {
              "accessibleRouteWidthFt": 6,
              "peakCongestionIndex": 79
            },
            "spatialEffects": [
              {
                "operation": "update_footprint",
                "objectId": "obj-route-main",
                "footprint": {
                  "width": 1.829
                }
              },
              {
                "operation": "update_footprint",
                "objectId": "obj-route-stage",
                "footprint": {
                  "width": 1.829
                }
              },
              {
                "operation": "update_footprint",
                "objectId": "obj-route-seating-west",
                "footprint": {
                  "width": 1.829
                }
              },
              {
                "operation": "update_footprint",
                "objectId": "obj-route-seating-east",
                "footprint": {
                  "width": 1.829
                }
              },
              {
                "operation": "update_footprint",
                "objectId": "obj-route-exit-east",
                "footprint": {
                  "width": 1.829
                }
              }
            ]
          },
          {
            "id": "chg-av-desk-east",
            "number": 3,
            "title": "Relocate AV desk for better sightlines",
            "shortTitle": "AV desk relocated",
            "metrics": [
              [
                "Sightline coverage",
                "100%"
              ],
              [
                "Blocked samples",
                "0 / 16"
              ]
            ],
            "targetObjectIds": [
              "obj-av-desk"
            ],
            "effects": {
              "sightlineCoverage": 0.92
            },
            "spatialEffects": [
              {
                "operation": "update_footprint",
                "objectId": "obj-av-desk",
                "footprint": {
                  "center": {
                    "x": 27,
                    "y": 3
                  }
                }
              }
            ]
          },
          {
            "id": "chg-refreshment-buffer",
            "number": 4,
            "title": "Expand refreshment area + add queue buffer",
            "shortTitle": "Queue zone +120 sq ft",
            "metrics": [
              [
                "Queue buffer",
                "+120 sq ft"
              ],
              [
                "East route",
                "CLEAR"
              ]
            ],
            "effects": {
              "queueBufferSqFt": 120,
              "eastRouteClear": true
            }
          }
        ]
      },
      "activeBranchId": "branch-balanced",
      "branches": [
        {
          "id": "branch-balanced",
          "name": "Balanced",
          "notes": "",
          "strategy": "balanced",
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            "id": "proposal-32-a",
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            "changes": [
              {
                "id": "chg-seat-center-shift",
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                  [
                    "Service lane",
                    "+6 ft"
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                  [
                    "Capacity",
                    "400"
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                ],
                "effects": {
                  "serviceLaneWidthFt": 6
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              },
              {
                "id": "chg-center-aisle-width",
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                  [
                    "Accessible route",
                    "1.829 m"
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                    "Peak congestion",
                    "66.5"
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                ],
                "targetObjectIds": [
                  "obj-route-main",
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                  "obj-route-seating-west",
                  "obj-route-seating-east",
                  "obj-route-exit-east"
                ],
                "effects": {
                  "accessibleRouteWidthFt": 6,
                  "peakCongestionIndex": 79
                },
                "spatialEffects": [
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-route-main",
                    "footprint": {
                      "width": 1.829
                    }
                  },
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-route-stage",
                    "footprint": {
                      "width": 1.829
                    }
                  },
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-route-seating-west",
                    "footprint": {
                      "width": 1.829
                    }
                  },
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-route-seating-east",
                    "footprint": {
                      "width": 1.829
                    }
                  },
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-route-exit-east",
                    "footprint": {
                      "width": 1.829
                    }
                  }
                ]
              },
              {
                "id": "chg-av-desk-east",
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                "title": "Relocate AV desk for better sightlines",
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                  [
                    "Sightline coverage",
                    "100%"
                  ],
                  [
                    "Blocked samples",
                    "0 / 16"
                  ]
                ],
                "targetObjectIds": [
                  "obj-av-desk"
                ],
                "effects": {
                  "sightlineCoverage": 0.92
                },
                "spatialEffects": [
                  {
                    "operation": "update_footprint",
                    "objectId": "obj-av-desk",
                    "footprint": {
                      "center": {
                        "x": 27,
                        "y": 3
                      }
                    }
                  }
                ]
              },
              {
                "id": "chg-refreshment-buffer",
                "number": 4,
                "title": "Expand refreshment area + add queue buffer",
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                "metrics": [
                  [
                    "Queue buffer",
                    "+120 sq ft"
                  ],
                  [
                    "East route",
                    "CLEAR"
                  ]
                ],
                "effects": {
                  "queueBufferSqFt": 120,
                  "eastRouteClear": true
                }
              }
            ]
          },
          "revisions": [],
          "archived": false,
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          "createdAt": "2026-08-27T00:00:00.000Z",
          "createdBy": "agent"
        }
      ],
      "projectLocks": [],
      "comments": [],
      "scenarios": [],
      "scenarioRuns": [],
      "editHistory": {
        "undo": [],
        "redo": []
      },
      "ledger": [
        {
          "id": "ledger-0001",
          "schemaVersion": 1,
          "sequence": 1,
          "type": "plan.opened",
          "actor": "human",
          "actorId": "human",
          "actorType": "human",
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            "afterPlanVersion": "3.2",
            "acceptedPlan": {
              "id": "plan-summit-forward-2026",
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                "id": "event-summit-forward-2026",
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              },
              "venue": {
                "id": "venue-harborview-main-hall",
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              },
              "templateBindings": {
                "venue": {
                  "templateId": "venue-template-harborview",
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                },
                "room": {
                  "templateId": "room-template-harborview-main-hall",
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                  "roomInstanceId": "room-harborview-main-hall"
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              },
              "occupancy": {
                "venueMaximum": 450,
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                    "objectId": "obj-seating-west",
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                    "maximumCapacity": 220
                  },
                  {
                    "objectId": "obj-seating-east",
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                    "maximumCapacity": 220
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                ],
                "zones": [
                  {
                    "id": "zone-keynote-floor",
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                    "sectionObjectIds": [
                      "obj-seating-west",
                      "obj-seating-east"
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                    "maximumCapacity": 410
                  }
                ]
              },
              "accessibilityPolicy": {
                "minimumRouteWidthM": 1.8,
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                "minimumAccessibleSeatingSections": 2,
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                "minimumRampClearWidthM": 0.915,
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                "requireRampHandrails": true,
                "jurisdiction": "US venue policy",
                "source": "Harborview Access Standard 2026",
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              },
              "spatial": {
                "schemaVersion": 1,
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                },
                "layers": [
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                  "annotations"
                ],
                "coordinateSystem": {
                  "origin": "southwest",
                  "xAxis": "east",
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                  "rotationDirection": "clockwise"
                },
                "precision": {
                  "distance": 3,
                  "angle": 1
                },
                "roomBoundary": {
                  "outer": [
                    {
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                    {
                      "x": 30,
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                    {
                      "x": 30,
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                    {
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                  ],
                  "holes": []
                },
                "fingerprint": "geom-f712f754"
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              "staffing": {
                "schemaVersion": 1,
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                      "incident-response"
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                  },
                  {
                    "id": "role-access-steward",
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                    "skills": [
                      "access-assistance"
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                  },
                  {
                    "id": "role-stage-manager",
                    "label": "Stage manager",
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                    "skills": [
                      "production"
                    ]
                  },
                  {
                    "id": "role-service-lead",
                    "label": "Service lead",
                    "headcount": 4,
                    "skills": [
                      "food-service"
                    ]
                  }
                ],
                "shifts": [
                  {
                    "id": "shift-a",
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                    "startMinute": 0,
                    "endMinute": 255
                  },
                  {
                    "id": "shift-b",
                    "label": "B",
                    "startMinute": 240,
                    "endMinute": 480
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                ],
                "coverageRequirements": [
                  {
                    "id": "coverage-main-entrance",
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                    "shiftIds": [
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                  },
                  {
                    "id": "coverage-fire-exit",
                    "zoneObjectId": "obj-fire-exit-east",
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                    "shiftIds": [
                      "shift-a",
                      "shift-b"
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                  },
                  {
                    "id": "coverage-access-route",
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                    "shiftIds": [
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                  },
                  {
                    "id": "coverage-stage",
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                    "shiftIds": [
                      "shift-a",
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                  },
                  {
                    "id": "coverage-catering",
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                    "minimumCount": 1,
                    "shiftIds": [
                      "shift-a",
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                  }
                ],
                "minimumHandoffOverlapMinutes": 15,
                "maximumWalkingDistanceM": 12
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              "productionPolicy": {
                "schemaVersion": 1,
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                "allowedAccessibleCrossingTreatments": [
                  "overhead",
                  "cable-ramp"
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              },
              "cateringPolicy": {
                "schemaVersion": 1,
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                  },
                  {
                    "id": "phase-break",
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                    "demandRatio": 0.75
                  },
                  {
                    "id": "phase-lunch",
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                ],
                "minimumSeparationFromProductionM": 0.5,
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                "allowedReplenishmentCrossingControls": [
                  "timed-crossing",
                  "marshal"
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              },
              "emergencyPlan": {
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                  "safety-officer",
                  "venue-administrator"
                ],
                "assumptions": [
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                "scenarioDefinitions": [
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                  }
                ]
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                  },
                  "locks": [
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                    {
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                  "templateOverrides": [
                    "occupancy"
                  ],
                  "occupancy": {
                    "excludesUsableArea": true
                  },
                  "restriction": {
                    "access": "staff-only",
                    "reasonCode": "production-clearance",
                    "blocksPlacement": true
                  },
                  "footprint": {
                    "kind": "rectangle",
                    "center": {
                      "x": 4,
                      "y": 18
                    },
                    "width": 6,
                    "depth": 2,
                    "rotationDegrees": 0
                  },
                  "locks": []
                },
                {
                  "id": "obj-route-staff-service",
                  "kind": "service_lane",
                  "label": "Staff service route",
                  "layer": "access",
                  "elevationM": 0,
                  "locked": false,
                  "route": {
                    "direction": "bidirectional",
                    "accessible": false,
                    "purpose": "staff-only",
                    "staffOnly": true
                  },
                  "footprint": {
                    "kind": "line",
                    "start": {
                      "x": 25,
                      "y": 5.5
                    },
                    "end": {
                      "x": 28,
                      "y": 1.5
                    },
                    "width": 1
                  },
                  "locks": []
                },
                {
                  "id": "obj-post-entrance",
                  "kind": "staff_post",
                  "label": "Entrance post",
                  "layer": "annotations",
                  "elevationM": 0,
                  "locked": false,
                  "staffPost": {
                    "coverageZoneObjectIds": [
                      "obj-accessible-entrance-south"
                    ],
                    "assignments": [
                      {
                        "shiftId": "shift-a",
                        "roleId": "role-security",
                        "count": 2
                      },
                      {
                        "shiftId": "shift-b",
                        "roleId": "role-security",
                        "count": 2
                      }
                    ]
                  },
                  "footprint": {
                    "kind": "circle",
                    "center": {
                      "x": 12.5,
                      "y": 2.5
                    },
                    "radius": 0.2
                  },
                  "locks": []
                },
                {
                  "id": "obj-post-exit",
                  "kind": "staff_post",
                  "label": "Exit post",
                  "layer": "annotations",
                  "elevationM": 0,
                  "locked": false,
                  "staffPost": {
                    "coverageZoneObjectIds": [
                      "obj-fire-exit-east"
                    ],
                    "assignments": [
                      {
                        "shiftId": "shift-a",
                        "roleId": "role-security",
                        "count": 1
                      },
                      {
                        "shiftId": "shift-b",
                        "roleId": "role-security",
                        "count": 1
                      }
                    ]
                  },
                  "footprint": {
                    "kind": "circle",
                    "center": {
                      "x": 27.5,
                      "y": 12.5
                    },
                    "radius": 0.2
                  },
                  "locks": []
                },
                {
                  "id": "obj-post-access",
                  "kind": "staff_post",
                  "label": "Access post",
                  "layer": "annotations",
                  "elevationM": 0,
                  "locked": false,
                  "staffPost": {
                    "coverageZoneObjectIds": [
                      "obj-route-main"
                    ],
                    "assignments": [
                      {
                        "shiftId": "shift-a",
                        "roleId": "role-access-steward",
                        "count": 1
                      },
                      {
                        "shiftId": "shift-b",
                        "roleId": "role-access-steward",
                        "count": 1
                      }
                    ]
                  },
                  "footprint": {
                    "kind": "circle",
                    "center": {
                      "x": 16.5,
                      "y": 3
                    },
                    "radius": 0.2
                  },
                  "locks": []
                },
                {
                  "id": "obj-post-stage",
                  "kind": "staff_post",
                  "label": "Stage post",
                  "layer": "annotations",
                  "elevationM": 0,
                  "locked": false,
                  "staffPost": {
                    "coverageZoneObjectIds": [
                      "obj-stage-west"
                    ],
                    "assignments": [
                      {
                        "shiftId": "shift-a",
                        "roleId": "role-stage-manager",
                        "count": 1
                      },
                      {
                        "shiftId": "shift-b",
                        "roleId": "role-stage-manager",
                        "count": 1
                      }
                    ]
                  },
                  "footprint": {
                    "kind": "circle",
                    "center": {
                      "x": 7.5,
                      "y": 16.5
                    },
                    "radius": 0.2
                  },
                  "locks": []
                },
                {
                  "id": "obj-post-catering",
                  "kind": "staff_post",
                  "label": "Service post",
                  "layer": "annotations",
                  "elevationM": 0,
                  "locked": false,
                  "staffPost": {
                    "coverageZoneObjectIds": [
                      "obj-refreshment-east"
                    ],
                    "assignments": [
                      {
                        "shiftId": "shift-a",
                        "roleId": "role-service-lead",
                        "count": 1
                      },
                      {
                        "shiftId": "shift-b",
                        "roleId": "role-service-lead",
                        "count": 1
                      }
                    ]
                  },
                  "footprint": {
                    "kind": "circle",
                    "center": {
                      "x": 25,
                      "y": 6
                    },
                    "radius": 0.2
                  },
                  "locks": []
                }
              ],
              "constraints": [
                {
                  "id": "constraint-protected-objects",
                  "checkId": "check-locked-objects",
                  "evaluator": "protected_objects_unchanged",
                  "label": "Locked objects",
                  "category": "protection",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "objectIds": [
                      "obj-stage-west",
                      "obj-fire-exit-east",
                      "obj-column-southwest",
                      "obj-accessible-entrance-south",
                      "obj-door-south-access",
                      "obj-restroom-accessible"
                    ]
                  },
                  "remediation": "Remove Changes that target protected venue objects.",
                  "waivable": false
                },
                {
                  "id": "constraint-accessible-route",
                  "checkId": "check-accessible-route",
                  "evaluator": "accessible_route_graph",
                  "label": "Accessible route",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumWidthM": 1.8,
                    "requireConnected": true
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Connect every required destination and increase the minimum clear route width.",
                  "waivable": false
                },
                {
                  "id": "constraint-turning-clearance",
                  "checkId": "check-turning-clearance",
                  "evaluator": "turning_clearance",
                  "label": "Turning clearance",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumDiameterM": 1.5
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Increase the clear turning diameter at route junctions.",
                  "waivable": false
                },
                {
                  "id": "constraint-accessible-seating",
                  "checkId": "check-accessible-seating",
                  "evaluator": "accessible_seating",
                  "label": "Accessible seating",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumSeats": 8,
                    "minimumSections": 2,
                    "requireCompanionAdjacency": true
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Add distributed accessible and companion seating positions.",
                  "waivable": false
                },
                {
                  "id": "constraint-accessible-seating-sightlines",
                  "checkId": "check-accessible-seating-sightlines",
                  "evaluator": "accessible_seating_sightlines",
                  "label": "Accessible seating sightlines",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumCoverageRatio": 1,
                    "minimumSectionCoverageRatio": 1
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Move obstructions or relocate accessible seating samples until every section has a clear focal-point ray.",
                  "waivable": false
                },
                {
                  "id": "constraint-door-clearance",
                  "checkId": "check-door-clearance",
                  "evaluator": "door_clearance",
                  "label": "Door clearance",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumClearWidthM": 0.915
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Clear the maneuvering zone and restore the required accessible door width.",
                  "waivable": false
                },
                {
                  "id": "constraint-temporary-ramps",
                  "checkId": "check-temporary-ramps",
                  "evaluator": "temporary_ramp",
                  "label": "Temporary ramps",
                  "category": "accessibility",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumSlopeRatio": 12,
                    "minimumClearWidthM": 0.915,
                    "minimumLandingLengthM": 1.525,
                    "minimumEdgeProtectionHeightM": 0.1,
                    "requireHandrails": true
                  },
                  "policy": {
                    "jurisdiction": "US venue policy",
                    "source": "Harborview Access Standard 2026",
                    "effectiveDate": "2026-01-01"
                  },
                  "remediation": "Increase ramp run, clear width, landing, or edge protection and add required handrails.",
                  "waivable": false
                },
                {
                  "id": "constraint-capacity",
                  "checkId": "check-capacity",
                  "evaluator": "occupancy_capacity",
                  "label": "Capacity",
                  "category": "capacity",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumAttendeeCapacity": 400,
                    "maximumOperationalLoad": 450
                  },
                  "remediation": "Restore sufficient placed capacity or reduce the operational load.",
                  "waivable": false
                },
                {
                  "id": "constraint-sightlines",
                  "checkId": "check-sightlines",
                  "evaluator": "sightline_raycast",
                  "label": "Sightline coverage",
                  "category": "sightlines",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "minimumCoverageRatio": 0.85,
                    "maximumViewingDistanceM": 30,
                    "maximumBlockedSectionRatio": 0.15
                  },
                  "remediation": "Move opaque obstructions or revise the seating section.",
                  "waivable": false
                },
                {
                  "id": "constraint-production-readiness",
                  "checkId": "check-production-readiness",
                  "evaluator": "production_readiness",
                  "label": "Production readiness",
                  "category": "production",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "maximumFailedChecks": 0
                  },
                  "remediation": "Resolve throw, visibility, audio, camera, cable, circuit, rigging, or inventory failures.",
                  "waivable": false
                },
                {
                  "id": "constraint-catering-readiness",
                  "checkId": "check-catering-readiness",
                  "evaluator": "catering_readiness",
                  "label": "Catering readiness",
                  "category": "catering",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "maximumFailedChecks": 0
                  },
                  "remediation": "Resolve service capacity, queue, separation, access, support, or replenishment failures.",
                  "waivable": false
                },
                {
                  "id": "constraint-emergency-readiness",
                  "checkId": "check-emergency-readiness",
                  "evaluator": "emergency_readiness",
                  "label": "Emergency readiness",
                  "category": "emergency",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "maximumStructuralFailures": 0
                  },
                  "remediation": "Restore exit, assembly, emergency access, fire equipment, first-aid, and command-post readiness.",
                  "waivable": false
                },
                {
                  "id": "constraint-peak-congestion",
                  "checkId": "check-circulation",
                  "evaluator": "circulation_graph",
                  "label": "Peak congestion",
                  "category": "circulation",
                  "severity": "error",
                  "scope": {
                    "kind": "plan"
                  },
                  "parameters": {
                    "maximumCongestionIndex": 80
                  },
                  "remediation": "Increase circulation width, reconnect occupied zones, or reduce phase demand.",
                  "waivable": false
                }
              ],
              "metrics": {
                "accessibleRouteWidthFt": 4,
                "attendeeCapacity": 400,
                "sightlineCoverage": 0.72,
                "peakCongestionIndex": 100,
                "serviceLaneWidthFt": 0,
                "queueBufferSqFt": 0,
                "eastRouteClear": false
              },
              "emergencyReviews": []
            },
            "planFingerprint": "plan-f4ce9ca9",
            "acceptedBrief": {
              "id": "brief-summit-forward-2026",
              "eventName": "SummitForward 2026",
              "date": "2026-09-12",
              "timezone": "America/New_York",
              "venueId": "venue-harborview-main-hall",
              "roomId": "room-harborview-main-hall",
              "attendeeTarget": 400,
              "occupancyMode": "theater",
              "schedule": {
                "startAt": "2026-09-12T08:00:00-04:00",
                "endAt": "2026-09-12T16:00:00-04:00",
                "timezone": "America/New_York"
              },
              "requirements": [
                {
                  "id": "req-theater-seating",
                  "category": "seating",
                  "label": "Theater style for keynotes",
                  "priority": "high",
                  "owner": "planning",
                  "status": "confirmed",
                  "measurable": true,
                  "constraintIds": [
                    "constraint-capacity"
                  ],
                  "evidenceRefs": []
                },
                {
                  "id": "req-west-stage",
                  "category": "production",
                  "label": "Stage on west wall",
                  "priority": "high",
                  "owner": "production",
                  "status": "confirmed",
                  "measurable": false,
                  "constraintIds": [],
                  "evidenceRefs": [
                    "obj-stage-west"
                  ]
                },
                {
                  "id": "req-breakout-access",
                  "category": "circulation",
                  "label": "Breakout access after keynotes",
                  "priority": "medium",
                  "owner": "operations",
                  "status": "open",
                  "measurable": false,
                  "constraintIds": [],
                  "evidenceRefs": []
                },
                {
                  "id": "req-accessible-route",
                  "category": "accessibility",
                  "label": "Keep accessible route clear",
                  "priority": "critical",
                  "owner": "access",
                  "status": "confirmed",
                  "measurable": true,
                  "constraintIds": [
                    "constraint-accessible-route"
                  ],
                  "evidenceRefs": []
                },
                {
                  "id": "req-av-control",
                  "category": "production",
                  "label": "Maintain AV control position",
                  "priority": "high",
                  "owner": "production",
                  "status": "confirmed",
                  "measurable": true,
                  "constraintIds": [
                    "constraint-production-readiness",
                    "constraint-sightlines"
                  ],
                  "evidenceRefs": [
                    "obj-av-desk",
                    "obj-projector-center",
                    "obj-screen-stage"
                  ]
                },
                {
                  "id": "req-catering-rear",
                  "category": "catering",
                  "label": "Catering at back of room",
                  "priority": "medium",
                  "owner": "catering",
                  "status": "confirmed",
                  "measurable": true,
                  "constraintIds": [
                    "constraint-catering-readiness"
                  ],
                  "evidenceRefs": [
                    "obj-bar-east",
                    "obj-kitchen-northeast",
                    "obj-refreshment-east"
                  ]
                },
                {
                  "id": "req-emergency-readiness",
                  "category": "emergency",
                  "label": "Emergency plan readiness",
                  "priority": "critical",
                  "owner": "safety",
                  "status": "confirmed",
                  "measurable": true,
                  "constraintIds": [
                    "constraint-emergency-readiness"
                  ],
                  "evidenceRefs": [
                    "obj-assembly-east",
                    "obj-command-post-north",
                    "obj-fire-exit-east",
                    "obj-fire-exit-north"
                  ]
                }
              ]
            },
            "briefFingerprint": "brief-1f947930"
          },
          "previousHash": "genesis",
          "hash": "ledger-0922ee78"
        }
      ],
      "receipts": []
    },
    "createdAt": "2026-08-27T00:00:00.000Z",
    "updatedAt": "2026-08-27T00:00:00.000Z"
  }
}
