Decoder update: decoder_config.json

decoder_config.json

@@ -18,7 +18,11 @@
   "virtual_cluster": 10,
   "virtual_border": 3,
   "arrow_tip": 8,
-  "arrow_thr": 0.25
+  "arrow_thr": 0.25,
+  "arrow_scale": 1.4,
+  "dash_gap": 12,
+  "dash_cos": 0.85,
+  "dash_look": 4
  },
  "notes": {
   "heat_thr": "tuned on real dev sheets 2026-09-27 (was 0.3): fewer weak false symbols",
@@ -38,6 +42,10 @@
   "virtual_cluster": "grid px: free ends this close are the same unrecognised symbol (runs arrive from sides)",
   "virtual_border": "grid px: free ends this close to the image edge are runs leaving the view, not devices",
   "arrow_tip": "grid px: a free end this close to an arrowhead is its tip, never an unrecognised device",
-  "arrow_thr": "home-run arrowheads' own peak floor (null = heat_thr): real arrows peak weaker than symbols; 0.25 tuned on dev 2026-10-05"
+  "arrow_thr": "home-run arrowheads' own peak floor (null = heat_thr): real arrows peak weaker than symbols; 0.25 tuned on dev 2026-10-05",
+  "arrow_scale": "second model pass on the sheet shrunk by this factor adds home runs whose arrowheads only fire there (drawn large next to small fixtures); 1 = off. 1.4 chosen on non-test sheets 2026-10-11 (predict.decode_two_scale)",
+  "dash_gap": "grid px: free stroke ends this close that point at each other are one dashed run (predict.bridge_dashes); 0 = off. Chosen on UK+US dev 2026-10-13 (experiments/dash_bridge.py)",
+  "dash_cos": "both ends' outward directions must point at the other end within this cosine",
+  "dash_look": "grid px walked back along a stroke to measure an end's direction"
  }
 }