diff --git a/agents-archi.html b/agents-archi.html
index 927737c50..d16216b26 100644
--- a/agents-archi.html
+++ b/agents-archi.html
@@ -475,13 +475,22 @@ A.forEach(function(a,i){
   let x,z;
   if(cnt===1){
     x=0;z=0;
-  } else {
+  } else if(cnt>=15){
+    // WAVE 200: Fibonacci sunflower — optimal disc distribution (T1/T2 overcrowded)
     const R=(pw[a.t]/2)*0.92;
-    // WAVE 190: Single circle — agents around meeting table
-    const angle=(ti/cnt)*Math.PI*2 - Math.PI/2; // start from top
-    const tableR=R*0.72; // agents sit at 72% of plateau radius
+    const golden=Math.PI*(3-Math.sqrt(5)); // golden angle ~137.5°
+    const theta=ti*golden - Math.PI/2;
+    const rFrac=Math.sqrt((ti+0.5)/cnt);
+    const discR=R*0.88; // 88% of plateau radius
+    x=rFrac*discR*Math.cos(theta);
+    z=rFrac*discR*Math.sin(theta)*0.72; // 72% Z perspective (less compression)
+  } else {
+    // Single circle for sparse tiers (T0=7, T3=13)
+    const R=(pw[a.t]/2)*0.92;
+    const angle=(ti/cnt)*Math.PI*2 - Math.PI/2;
+    const tableR=R*0.72;
     x=tableR*Math.cos(angle);
-    z=tableR*Math.sin(angle)*0.65; // 65% Z for perspective
+    z=tableR*Math.sin(angle)*0.65;
   }
 
   const url=_pk[a.n]||(a.r?'https://robohash.org/'+encodeURIComponent(a.n)+'?set=set1&size=200x200':'https://api.dicebear.com/9.x/adventurer/svg?seed='+encodeURIComponent(a.n));