passages: dense centripetal spline + open-air half-pipe attempt (L111, failed audits)

Route resampled to ~1 m (310 -> 2,790 segments); open air writes a 0.75 m floor slab plus 1.0 m
side walls, no roof. The 3D spline overshoots between planned route points, raising floor grades
above 15 deg; a grade-limited variant left 2 unsupported samples on passage 0-1, and the shell/
ripple audits still model the old chord route. Stopped after two designs. Not merged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

Standalone/Tools/verify/verify.py

@@ -122,11 +122,11 @@ RECIPE_RE = re.compile(
 
 def owner_hash_baseline(recipe: str, style: int) -> tuple[Path, str]:
     if recipe == "surface-world" and style == 1:
-        return (BASELINES / "owner-hash/canonical/owner-hash-surface-world-style1-v217.baseline",
-                "L109-v217-flat-floor-hollow-shell")
+        return (BASELINES / "owner-hash/canonical/owner-hash-surface-world-style1-v218.baseline",
+                "L111-v218-smooth-spline-half-pipe")
     if recipe == "floating-islands" and style == 2:
-        return (BASELINES / "owner-hash/canonical/owner-hash-floating-islands-style2-v217.baseline",
-                "L109-v217-flat-floor-hollow-shell")
+        return (BASELINES / "owner-hash/canonical/owner-hash-floating-islands-style2-v218.baseline",
+                "L111-v218-smooth-spline-half-pipe")
     raise VerificationFailure(f"no pinned owner hash baseline for {recipe} style {style}")