diag: bounded passage carve reach rejected (L93); R43 Unreal SW startup notes

Explicit carve reach R (diagnostic, default unbounded): R=2.5 m -> 1.56 cm max displacement,
106 deg max normal change; R=4 m -> 0.63 cm but 53 deg normals. Fails the bar; readiness gain
small and inconsistent (TN -5%, VS +6-7%). No world change (v214). Fast tier PASS.
R43: Unreal SW bReady 2.16 s = serial sign-edge repair (1.94 s, 10.9M corrections;
parallelSignEdgeRepair exists but off); ~0.45 s of SerializeResolvedWorld = adapter SW route search.

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

Standalone/Research/WorldAssemblerM3/Linux93/RunL93CarveReach.py

@@ -0,0 +1,135 @@
+#!/usr/bin/env python3
+"""Compare bounded passage-carve reaches over each owner's complete near view."""
+from __future__ import annotations
+
+import json
+import argparse
+import re
+import subprocess
+import time
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l93/effects"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINARY = ROOT / "Saved/Linux/l93/bin/VoxelForgeCoreHeadless-clang19"
+STRATA = {
+    "S0": {"camera": (8.0, 16.0, -372.2626953125), "near": 1408},
+    "FI": {"camera": (25.8369140625, 3.19921875, -737.0), "near": 1216},
+    "TN": {"camera": (19.166015625, -14.2001953125, -753.3740234375), "near": 1344},
+    "S3": {"camera": (-20.0625, -5.068359375, -900.353515625), "near": 1344},
+}
+REACHES = (1.5, 2.0, 2.5, 4.0)
+STAMP = re.compile(r"^\[VoxelForgeSourceStamp\] sha256=(\S+)$", re.M)
+COVERAGE = re.compile(r"^\[L93PassageReachCoverage\] (.*)$", re.M)
+SUMMARY = re.compile(r"^\[L93PassageReachSummary\] (.*)$", re.M)
+AUDIT = re.compile(r"^\[L93PassageReachAudit\] (.*)$", re.M)
+FIELDS = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+
+
+def parse_fields(line: str) -> dict[str, str]:
+    return dict(FIELDS.findall(line))
+
+
+def run(stratum: str) -> dict:
+    OUT.mkdir(parents=True, exist_ok=True)
+    spec = STRATA[stratum]
+    camera = ",".join(f"{value:.12f}" for value in spec["camera"]) + ",0,0"
+    log = OUT / f"{stratum.lower()}-reach-effects.log"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "env",
+        "VOXELFORGE_L81_PASSAGE_BOUND_PADDING_VOXELS=0", "timeout", "1740s",
+        str(BINARY), str(DATA), "--world-assembler-prototype", "--stream-benchmark",
+        "--stream-pipeline", "--workers=8", "--clip-radius=3", "--max-clip-level=8",
+        "--max-level=2", f"--camera={camera}", "--audit-passage-carve-reach",
+    ]
+    started = time.monotonic()
+    try:
+        with log.open("w", encoding="utf-8") as stream:
+            proc = subprocess.run(command, cwd=ROOT, stdout=stream,
+                                  stderr=subprocess.STDOUT, check=False, timeout=1750)
+    except subprocess.TimeoutExpired as exc:
+        raise RuntimeError(f"reach effect audit exceeded 1,750 seconds: {log}") from exc
+    output = log.read_text(encoding="utf-8", errors="replace")
+    coverage = COVERAGE.search(output)
+    summaries = [parse_fields(match.group(1)) for match in SUMMARY.finditer(output)]
+    audit = AUDIT.search(output)
+    stamp = STAMP.search(output)
+    expected = spec["near"]
+    coverage_fields = parse_fields(coverage.group(1)) if coverage else {}
+    coverage_ok = (int(coverage_fields.get("tiles", "0")) == expected
+                   and int(coverage_fields.get("lod0", "0"))
+                   + int(coverage_fields.get("lod1", "0"))
+                   + int(coverage_fields.get("lod2", "0")) == expected)
+    rows = []
+    for summary in summaries:
+        reach = float(summary["reach_m"])
+        tile_counts = summary["tiles"].split("/")
+        passed = (len(tile_counts) == 2 and int(tile_counts[0]) == expected
+                  and int(tile_counts[1]) == expected
+                  and summary["status"] == "PASS")
+        rows.append({
+            "reach_m": reach,
+            "tiles": summary["tiles"],
+            "samples": int(summary["samples"]),
+            "changed_samples": int(summary["changed_samples"]),
+            "sign_flips": int(summary["sign_flips"]),
+            "edge_crossing_mismatches": int(summary["edge_crossing_mismatches"]),
+            "moved_crossings": int(summary["moved_crossings"]),
+            "max_displacement_cm": float(summary["max_displacement_cm"]),
+            "max_normal_degrees": float(summary["max_normal_degrees"]),
+            "normal_pairing_failures": int(summary["normal_pairing_failures"]),
+            "status": "PASS" if passed else "FAIL",
+        })
+    row = {
+        "stratum": stratum,
+        "exit_code": proc.returncode,
+        "wall_s": round(time.monotonic() - started, 3),
+        "expected_near_tiles": expected,
+        "coverage": coverage_fields or None,
+        "coverage_ok": coverage_ok,
+        "reaches": rows,
+        "audit": parse_fields(audit.group(1)) if audit else None,
+        "source_stamp": stamp.group(1) if stamp else None,
+        "log": str(log.relative_to(ROOT)),
+    }
+    (OUT / f"{stratum.lower()}-reach-effects.json").write_text(
+        json.dumps(row, indent=2) + "\n", encoding="utf-8")
+    print("[L93CarveReachRun] " + json.dumps(row, sort_keys=True), flush=True)
+    return row
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--stratum", choices=tuple(STRATA), required=True)
+    args = parser.parse_args()
+    if not BINARY.is_file() or not DATA.is_file():
+        raise SystemExit(f"missing input: {BINARY} or {DATA}")
+    rows = [run(args.stratum)]
+    summaries: dict[str, dict] = {}
+    for reach in REACHES:
+        samples = [row for run_row in rows for row in run_row["reaches"]
+                   if row["reach_m"] == reach]
+        summaries[f"{reach:g}"] = {
+            "strata": len(samples),
+            "sign_flips": sum(row["sign_flips"] for row in samples),
+            "edge_crossing_mismatches": sum(row["edge_crossing_mismatches"] for row in samples),
+            "max_displacement_cm": max((row["max_displacement_cm"] for row in samples), default=0.0),
+            "max_normal_degrees": max((row["max_normal_degrees"] for row in samples), default=0.0),
+            "normal_pairing_failures": sum(row["normal_pairing_failures"] for row in samples),
+            "changed_samples": sum(row["changed_samples"] for row in samples),
+            "status": "PASS" if len(samples) == len(rows)
+                     and all(row["status"] == "PASS" for row in samples) else "FAIL",
+        }
+    result = {"runs": rows, "reach_summary": summaries}
+    (OUT / f"summary-{args.stratum.lower()}.json").write_text(
+        json.dumps(result, indent=2) + "\n", encoding="utf-8")
+    print("[L93CarveReachSummary] " + json.dumps(result, sort_keys=True), flush=True)
+    return 0 if all(row["coverage_ok"] and row["source_stamp"]
+                    and row["audit"] and row["audit"].get("status") == "PASS"
+                    for row in rows) and all(item["status"] == "PASS"
+                                             for item in summaries.values()) else 14
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())