skip: passage proof bounds include wall/floor relief (L75 soundness fix); FI -7.6%

L74's passage bound omitted the 0.21 m wall relief and 0.20 m floor relief, so its whole-tile
proof was unsound in principle (no tested view hit it). Passage support is now bounded per route
segment by four parameter-subinterval boxes using Catmull-Rom derivative extrema, local max
radius and relief padding. Stratum slicing only at LOD0-2 in FI/VS. Legacy sub-tile block
certificates are audit-only (runtime version was slower). TN regression (-80,-20,-3218) kept.

Exact full-grid vs skip hashes on every tile, 4 views, Clang/GCC, W1/W8/W12; control caught;
80-camera sweep 0 violations. Whole view vs c67b200: SW -1.3%, FI -7.6%, TN -2.3%, VS +0.2%.
Compiles in the Linux UE host (VFHostEditor, 27/27 actions).

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

Standalone/Research/WorldAssemblerM3/Linux75/RunVetoAuditL75.py

@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+"""Count first whole-tile proof vetoes among full-grid uniform observations."""
+from __future__ import annotations
+
+import json
+import re
+import subprocess
+import time
+from collections import Counter
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l75/logs"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BIN = ROOT / "Saved/Linux/l75/bin/VoxelForgeCoreHeadless-l75-clang"
+CAMERAS = {
+    0: (8.0, 16.0, -372.2626953125),
+    1: (25.8369140625, 3.19921875, -737.0),
+    2: (19.166015625, -14.2001953125, -753.3740234375),
+    3: (-20.0625, -5.068359375, -900.353515625),
+}
+ROW = re.compile(r"\[UniformGridCeiling\] (.*)")
+PAIR = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+REASONS = {
+    0: "none_or_certified", 1: "detail_envelope", 2: "composer_candidate",
+    3: "passage_bounds", 4: "primitive_overlap", 5: "transition",
+    6: "stratum_crossing", 7: "smooth_min_slack", 8: "other",
+}
+
+
+def run(view: int) -> list[dict]:
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[view]) + ",0,0"
+    log = OUT / f"veto-view{view}.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout",
+        "1740s", str(BIN), str(DATA), "--world-assembler-prototype",
+        "--stream-benchmark", "--stream-pipeline", "--stream-hash-tiles",
+        "--force-generate", "--workers=8", "--clip-radius=3", "--max-clip-level=8",
+        "--max-level=8", f"--camera={camera}",
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as output:
+        result = subprocess.run(command, cwd=ROOT, stdout=output,
+                                stderr=subprocess.STDOUT, check=False, timeout=1740)
+    rows = []
+    for line in log.read_text(encoding="utf-8", errors="replace").splitlines():
+        match = ROW.search(line)
+        if not match:
+            continue
+        row = dict(PAIR.findall(match.group(1)))
+        key_value = row["key"].strip("()")
+        row["key"] = tuple(int(value) for value in key_value.split(","))
+        row = {key: (value if key == "key" else int(value))
+               for key, value in row.items()}
+        row.update(view=view, log=str(log.relative_to(ROOT)))
+        rows.append(row)
+    print(json.dumps({"view": view, "exit_code": result.returncode,
+                      "wall_s": round(time.monotonic() - started, 3),
+                      "tiles": len(rows), "log": str(log.relative_to(ROOT))},
+                     sort_keys=True), flush=True)
+    if result.returncode != 0 or not rows:
+        raise SystemExit(f"veto audit view {view} failed or emitted no rows; see {log}")
+    return rows
+
+
+def main() -> int:
+    if not DATA.is_file() or not BIN.is_file():
+        raise SystemExit("missing owner world or L75 Clang headless binary")
+    OUT.mkdir(parents=True, exist_ok=True)
+    all_rows = [row for view in range(4) for row in run(view)]
+    missed = [row for row in all_rows if row["samples"] > 0 and row["uniform"]
+              and not row["proof_safe"]]
+    counts = Counter(row["proof_veto"] for row in missed)
+    by_strate = []
+    for view in range(4):
+        group = [row for row in missed if row["view"] == view]
+        by_strate.append({
+            "strate": view,
+            "missed_uniform_tiles": len(group),
+            "vetoes": {REASONS.get(reason, f"unknown_{reason}"): count
+                       for reason, count in sorted(Counter(
+                           row["proof_veto"] for row in group).items())},
+        })
+    summary = {
+        "observations": len(all_rows),
+        "sampled_tiles": sum(row["samples"] > 0 for row in all_rows),
+        "true_uniform_tiles": sum(row["samples"] > 0 and row["uniform"]
+                                   for row in all_rows),
+        "missed_uniform_tiles": len(missed),
+        "vetoes": {REASONS.get(reason, f"unknown_{reason}"): count
+                   for reason, count in sorted(counts.items())},
+        "by_strate": by_strate,
+        "missed_tiles": missed,
+    }
+    (OUT / "veto-audit.json").write_text(json.dumps(summary, indent=2) + "\n",
+                                         encoding="utf-8")
+    print("[L75VetoSummary] " + json.dumps({key: value for key, value in summary.items()
+          if key != "missed_tiles"}, sort_keys=True), flush=True)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())