{
  "kind": "building",
  "id": "concordance-resonator",
  "role": "monument",
  "name": "Concordance Resonator",
  "footprint": "3.17×2.83 tiles",
  "function": "This final civic instrument gathers grafts and guided signal to send Serravane's first deliberate message through the buried organism.",
  "shape_and_silhouette": "A tall three-armed triangular plan radiates from one open central signal shaft, with a long +Z entrance arm and two unequal rear arms rising into separate blade-like spars instead of enclosing circular rings.",
  "visual_description": "Broad pale membrane panels give the monument luminous breathing space between three black structural strokes, while each stroke thickens at the central knot and thins into a long divergent needle above the arms.",
  "production_notes": "The front +Z arm carries the axial entry into an open center, two rear arms contain separate graft service doors, three founded basalt spar clusters and short cross braces support upright membrane planes, and the top view must reveal a clear asymmetric three-pronged star inside the fixed rectangular plot.",
  "departure": "The resonator turns the city's repair grammar into an elevated three-way transmission instrument, with a tall open shaft and triangular ground plan unlike the brine processor's low twin pods.",
  "shared_traits": [
    "Black structural ribs vary from heavy roots at junctions to needle-thin tips, with finer secondary filament lines.",
    "Several ribs converge into dense asymmetric knots, then splay into long crossing sweeps with sharp hooked terminals.",
    "Pale membrane planes balance the black three-arm skeleton and make the monument luminous rather than uniformly dark."
  ],
  "constraints": [
    "Keep geometry inside the fixed 76×68 world-unit footprint and the main approach at center +Z.",
    "Show three founded arms, an open central shaft, side service access and physically supported upright membrane planes from all views.",
    "Make the top view a three-pronged triangular plan with no circular ring, paired vats or twin-tower symmetry, and avoid a generic gothic cathedral or angel silhouette."
  ],
  "idle_animation": "A slow teal pulse climbs the front arm to the open shaft and divides unevenly toward the two rear arms while membrane planes flex only a few degrees.",
  "day_night": "By day the pale upright membranes and black tapering spars share the silhouette; at night a dim traveling teal signal traces the three distinct arms without turning the monument into a lamp."
}