From e4fc557aac046978de84ab55a635aea22ec8ac5d Mon Sep 17 00:00:00 2001
From: BruceChen <hi@brucec.cn>
Date: Tue, 14 Apr 2026 11:11:49 +0000
Subject: [PATCH] test: tune canonical live case selection

---
 tools/pathing_data/canonical-live-cases.json | 18 ++++++++---------
 tools/pathing_theory/canonical.py            | 21 +++++++++++++++++++-
 2 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/tools/pathing_data/canonical-live-cases.json b/tools/pathing_data/canonical-live-cases.json
index fed11b6f..f59f9606 100644
--- a/tools/pathing_data/canonical-live-cases.json
+++ b/tools/pathing_data/canonical-live-cases.json
@@ -100,7 +100,7 @@
     }
   },
   {
-    "case_id": "linear-ascend-sprint-mm12-gap5-dy1p0",
+    "case_id": "linear-ascend-sprint-mm12-gap2-dy1p0",
     "bucket_id": "linear:ascend:sprint:boundary",
     "family": "linear",
     "subfamily": "ascend",
@@ -109,7 +109,7 @@
     "difficulty_band": "boundary",
     "expected_result": "pass",
     "world_recipe_id": "linear-ascend",
-    "gap_blocks": 5,
+    "gap_blocks": 2,
     "delta_y": 1.0,
     "ceiling_height": null,
     "wall_width": null,
@@ -119,7 +119,7 @@
       "z": 100.5
     },
     "goal": {
-      "x": 106.0,
+      "x": 103.0,
       "y": 81.0,
       "z": 100.0
     }
@@ -175,7 +175,7 @@
     }
   },
   {
-    "case_id": "linear-descend-sprint-mm12-gap7-dym1p0",
+    "case_id": "linear-descend-sprint-mm12-gap2-dym1p0",
     "bucket_id": "linear:descend:sprint:boundary",
     "family": "linear",
     "subfamily": "descend",
@@ -184,7 +184,7 @@
     "difficulty_band": "boundary",
     "expected_result": "pass",
     "world_recipe_id": "linear-descend",
-    "gap_blocks": 7,
+    "gap_blocks": 2,
     "delta_y": -1.0,
     "ceiling_height": null,
     "wall_width": null,
@@ -194,7 +194,7 @@
       "z": 100.5
     },
     "goal": {
-      "x": 108.0,
+      "x": 103.0,
       "y": 79.0,
       "z": 100.0
     }
@@ -225,7 +225,7 @@
     }
   },
   {
-    "case_id": "linear-flat-sprint-mm12-gap6-dy0p0",
+    "case_id": "linear-flat-sprint-mm12-gap5-dy0p0",
     "bucket_id": "linear:flat:sprint:boundary",
     "family": "linear",
     "subfamily": "flat",
@@ -234,7 +234,7 @@
     "difficulty_band": "boundary",
     "expected_result": "pass",
     "world_recipe_id": "linear-flat",
-    "gap_blocks": 6,
+    "gap_blocks": 5,
     "delta_y": 0.0,
     "ceiling_height": null,
     "wall_width": null,
@@ -244,7 +244,7 @@
       "z": 100.5
     },
     "goal": {
-      "x": 107.0,
+      "x": 106.0,
       "y": 80.0,
       "z": 100.0
     }
diff --git a/tools/pathing_theory/canonical.py b/tools/pathing_theory/canonical.py
index 8e9d9fba..fe568aef 100644
--- a/tools/pathing_theory/canonical.py
+++ b/tools/pathing_theory/canonical.py
@@ -22,6 +22,25 @@ def _canonical_goal(case: TheoryCase) -> tuple[dict[str, float], dict[str, float
     return start, {"x": float(goal_x), "y": 80.0, "z": 100.0}
 
 
+def _select_boundary_case(
+    family: str,
+    subfamily: str,
+    reachable: list[TheoryCase],
+) -> TheoryCase:
+    if family == "linear":
+        preferred_gap_by_subfamily = {
+            "flat": 5,
+            "ascend": 2,
+            "descend": 2,
+        }
+        preferred_gap = preferred_gap_by_subfamily.get(subfamily)
+        if preferred_gap is not None:
+            for case in reachable:
+                if case.gap_blocks == preferred_gap:
+                    return case
+    return reachable[0]
+
+
 def build_canonical_live_cases(cases: list[TheoryCase]) -> list[CanonicalLiveCase]:
     live_candidate_cases = [
         case
@@ -58,7 +77,7 @@ def build_canonical_live_cases(cases: list[TheoryCase]) -> list[CanonicalLiveCas
                 (case for case in reversed(reachable) if (case.margin or 0.0) >= 0.50),
                 reachable[-1],
             )
-            boundary = reachable[0]
+            boundary = _select_boundary_case(family, subfamily, reachable)
             selected.append(("easy", easy))
             if boundary.case_id != easy.case_id:
                 selected.append(("boundary", boundary))