try

d2layouts/d2cycle/layout.go

@@ -119,7 +119,7 @@ func createCircularArc(edge *d2graph.Edge) {
 			tangentX /= mag
 			tangentY /= mag
 		}
-        const MIN_SEGMENT_LEN = 2.0
+        const MIN_SEGMENT_LEN = 3.0
 		// Calculate current segment direction
 		dx := lastPoint.X - secondLastPoint.X
 		dy := lastPoint.Y - secondLastPoint.Y

e2etests/testdata/txtar/cycle-diagram/dagre/board.exp.json

@@ -864,8 +864,8 @@
           "y": -37.47600173950195
         },
         {
-          "x": 196.9219970703125,
-          "y": -34.97200012207031
+          "x": 196.7570037841797,
+          "y": -35.95800018310547
         },
         {
           "x": 197.2519989013672,
@@ -1228,8 +1228,8 @@
           "y": 197.53700256347656
         },
         {
-          "x": 28.48200035095215,
-          "y": 197.96499633789062
+          "x": 29.472999572753906,
+          "y": 197.83200073242188
         },
         {
           "x": 26.5,
@@ -1592,8 +1592,8 @@
           "y": 37.47600173950195
         },
         {
-          "x": -196.9219970703125,
-          "y": 34.97200012207031
+          "x": -196.7570037841797,
+          "y": 35.95800018310547
         },
         {
           "x": -197.2519989013672,
@@ -1972,8 +1972,8 @@
           "y": 111.8030014038086
         },
         {
-          "x": 702.10302734375,
-          "y": 115.11499786376953
+          "x": 702.43798828125,
+          "y": 114.1729965209961
         },
         {
           "x": 701.4329833984375,
@@ -2336,8 +2336,8 @@
           "y": 186.90899658203125
         },
         {
-          "x": 364.97198486328125,
-          "y": 184.4929962158203
+          "x": 365.6369934082031,
+          "y": 185.24000549316406
         },
         {
           "x": 363.6419982910156,

e2etests/testdata/txtar/cycle-diagram/elk/board.exp.json

@@ -864,8 +864,8 @@
           "y": -25.47599983215332
         },
         {
-          "x": 208.9219970703125,
-          "y": -22.972000122070312
+          "x": 208.7570037841797,
+          "y": -23.95800018310547
         },
         {
           "x": 209.2519989013672,
@@ -1228,8 +1228,8 @@
           "y": 209.53700256347656
         },
         {
-          "x": 40.481998443603516,
-          "y": 209.96499633789062
+          "x": 41.472999572753906,
+          "y": 209.83200073242188
         },
         {
           "x": 38.5,
@@ -1592,8 +1592,8 @@
           "y": 49.47600173950195
         },
         {
-          "x": -184.9219970703125,
-          "y": 46.97200012207031
+          "x": -184.7570037841797,
+          "y": 47.95800018310547
         },
         {
           "x": -185.2519989013672,
@@ -1972,8 +1972,8 @@
           "y": 123.8030014038086
         },
         {
-          "x": 674.60302734375,
-          "y": 127.11499786376953
+          "x": 674.93798828125,
+          "y": 126.1729965209961
         },
         {
           "x": 673.9329833984375,
@@ -2336,8 +2336,8 @@
           "y": 198.90899658203125
         },
         {
-          "x": 337.47198486328125,
-          "y": 196.4929962158203
+          "x": 338.1369934082031,
+          "y": 197.24000549316406
         },
         {
           "x": 336.1419982910156,