research: post-swept-tube near-ready cost account (L103, measurement only)

FI/TN LOD0-2 W12 worker CPU 13.9/12.2 s: passages 40/35%, far-shell refinement (HasDownwardHit/
HasUpwardHit ~1.7-1.9 s) in 'other' 27/30%, support 14/13%, dispatch 8%, base field 6%, bands 6%.
Workers 28%/24% idle during LOD0-1. Near-ready W12: SW 0.77, FI 1.51, TN 1.38, VS 0.96 s.

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

Standalone/Research/WorldAssemblerM3/Linux103/RunL103Census.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""Run current-source W12 L77 route/phase and exact-call censuses."""
+from __future__ import annotations
+
+import json
+import subprocess
+import time
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l103/census"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINARY = ROOT / "Saved/Linux/l103/profile-bin/VoxelForgeCoreHeadless-l103-profile-clang"
+CAMERAS = {
+    "SW": (8.0, 16.0, -372.2626953125),
+    "FI": (25.8369140625, 3.19921875, -737.0),
+    "TN": (19.166015625, -14.2001953125, -753.3740234375),
+    "VS": (-20.0625, -5.068359375, -900.353515625),
+}
+
+
+def run(stratum: str, replicate: int) -> dict:
+    OUT.mkdir(parents=True, exist_ok=True)
+    log = OUT / f"{stratum.lower()}-r{replicate}.log"
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[stratum]) + ",0,0"
+    command = [
+        "taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--", "timeout", "1740s",
+        str(BINARY), str(DATA), "--world-assembler-prototype", "--stream-benchmark",
+        "--stream-pipeline", "--workers=12", "--clip-radius=3", "--max-clip-level=8",
+        "--max-level=8", f"--camera={camera}",
+        "--profile-lod-work", "--profile-passage-composer", "--linux77-profile",
+    ]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as stream:
+        result = subprocess.run(command, cwd=ROOT, stdout=stream, stderr=subprocess.STDOUT,
+                                check=False, timeout=1740)
+    row = {"stratum": stratum, "replicate": replicate, "workers": 12,
+           "exit_code": result.returncode,
+           "wall_s": round(time.monotonic() - started, 3),
+           "log": str(log.relative_to(ROOT))}
+    print("[L103CensusRun] " + json.dumps(row, sort_keys=True), flush=True)
+    if result.returncode:
+        raise RuntimeError(f"census run failed: {log}, exit={result.returncode}")
+    return row
+
+
+def main() -> int:
+    if not BINARY.is_file() or not DATA.is_file():
+        raise SystemExit(f"missing input: {BINARY} or {DATA}")
+    runs = []
+    # Three balanced rounds cover every stratum; reverse order in the middle.
+    orders = (("SW", "FI", "TN", "VS"), ("VS", "TN", "FI", "SW"),
+              ("FI", "SW", "VS", "TN"))
+    for replicate, order in enumerate(orders, 1):
+        for stratum in order:
+            runs.append(run(stratum, replicate))
+            (OUT / "runs-partial.json").write_text(
+                json.dumps(runs, indent=2) + "\n", encoding="utf-8")
+    (OUT / "runs.json").write_text(json.dumps(runs, indent=2) + "\n", encoding="utf-8")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())