passages: smooth 12 m lower-mouth radius taper; all four-strate passages pass (L68, v213)

The FI->TN wall beat (4.77 cm at 7.06 m) was the lower-mouth flare: the full mouth radius
was assigned to the penultimate control point, a one-segment radius jump. The shared route
builder now blends to the mouth radius over 12 m with a smoothstep. Wall ripple 1-2:
7.27 -> 1.62 cm. All three passages pass support/blocked/grade/ripple/naturalness; controls
detected. Fast tier 269/269 incl. the new-plan stage; W1/W8/W12 equal, Clang and GCC.
Hash pins: FI style 2 re-pinned at v213.

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

Standalone/Tools/verify/verify.py

@@ -30,6 +30,7 @@ LINUX56 = ROOT / "Standalone/Research/WorldAssemblerM3/Linux56"
 LINUX58 = ROOT / "Standalone/Research/WorldAssemblerM3/Linux58"
 LINUX60 = ROOT / "Standalone/Research/WorldAssemblerM3/Linux60"
 LINUX67 = ROOT / "Standalone/Research/WorldAssemblerM3/Linux67"
+LINUX68 = ROOT / "Standalone/Research/WorldAssemblerM3/Linux68"
 OWNER = ROOT / "Standalone/data/regression/owner_world_2strate_l61.json"
 OWNER_NEW = ROOT / "Standalone/data/owner_world.json"
 OWNER_2STRATE_SHA256 = "7b095f9bcc6b90133d5a463f99f0b571133b2c549ce1ecf2d64fe9175e41e183"
@@ -101,6 +102,16 @@ RECIPE_RE = re.compile(
     r"^\[WorldAssemblerRecipeAudit\] requested=([^ ]+) actual=([^ ]+).*status=([^ ]+)$", re.M)
 
 
+def owner_hash_baseline(recipe: str, style: int) -> tuple[Path, str]:
+    if recipe == "surface-world" and style == 1:
+        return (LINUX67 / "hash-baselines" / "owner-hash-surface-world-style1-v212.log",
+                "L67-v212")
+    if recipe == "floating-islands" and style == 2:
+        return (LINUX68 / "hash-baselines" / "owner-hash-floating-islands-style2-v213.log",
+                "L68-v213")
+    raise VerificationFailure(f"no pinned owner hash baseline for {recipe} style {style}")
+
+
 def compiler_name(binary: Path) -> str:
     return "gcc" if "gcc" in binary.name else "clang"
 
@@ -624,13 +635,7 @@ def run_hash_pairs(runner: VerificationRunner,
         l52_baseline = ROOT / "Saved/Linux/l52" / f"owner-hash-{recipe}-style{style}-w12.log"
         l52_hashes = tuple(HASH_RE.findall(l52_baseline.read_text(
             encoding="utf-8", errors="replace")))
-        if recipe == "surface-world":
-            expected_baseline = LINUX67 / "hash-baselines" / (
-                "owner-hash-surface-world-style1-v212.log")
-            expected_label = "L67-v212"
-        else:
-            expected_baseline = l52_baseline
-            expected_label = "L52"
+        expected_baseline, expected_label = owner_hash_baseline(recipe, style)
         expected_hashes = tuple(HASH_RE.findall(expected_baseline.read_text(
             encoding="utf-8", errors="replace")))
         same_expected = hashes[12] == expected_hashes and len(expected_hashes) == 12
@@ -674,11 +679,11 @@ def run_default_profile_identity(runner: VerificationRunner, binary: Path) -> No
             expected_style=2, expected_strate_styles={"0": 2, "1": 1}, workers=12,
             layout_path=OUT / "layouts" / f"{name}.json")
         values = tuple(HASH_RE.findall(output))
-        baseline = ROOT / "Saved/Linux/l52" / f"owner-hash-{recipe}-style{style}-w12.log"
+        baseline, label = owner_hash_baseline(recipe, style)
         expected = tuple(HASH_RE.findall(baseline.read_text(
             encoding="utf-8", errors="replace")))
-        runner.require(f"{name}:matches-L52", len(values) == 12 and values == expected,
-            f"current={len(values)} L52={len(expected)} exact canonical hash rows")
+        runner.require(f"{name}:matches-{label}", len(values) == 12 and values == expected,
+            f"current={len(values)} {label}={len(expected)} exact canonical hash rows")
 
 
 class _SplitMix64: