docs+cleanup: CURRENT-STATE.md and dead L86/L88 ablation switches removed (L131)

One current-state page (shipping behaviour, references with sources, gaps, verification, closed lines), linked from CLAUDE.md. Removes the L86/L88 passage/boundary ablation switches and the unused legacy route-grade audit; inventory of every kept switch in the report. Output identical: 24/24 + 18/18 hashes, fast tier, walk/seam audits, UE host build; timing unchanged (-0.2%, CI spans 0). No Source/ changes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
2026-10-31 02:11:10 +01:00
1 parent cbbfd46bd3
commit 81071969fc
@@ -33,48 +33,22 @@
 #include <variant>
 #include <vector>

-// L88-only composition split. These switches let the timing harness remove passage work and
-// resolved boundary-band work independently. They are diagnostic only, never world settings.
-static bool VF_IsL88DiagnosticSwitchEnabled(const char* Name)
+static bool VF_IsDiagnosticEnvSwitchEnabled(const char* Name)
 {
    const char* Value=std::getenv(Name);
    return Value&&Value[0]=='1'&&Value[1]=='\0';
 }

-static bool VF_IsL88PassageCompositionDisabled()
-{
-    static const bool bDisabled=VF_IsL88DiagnosticSwitchEnabled(
-        "VOXELFORGE_L88_DISABLE_PASSAGES")
-        ||VF_IsL88DiagnosticSwitchEnabled("VOXELFORGE_L86_DISABLE_PASSAGE_COMPOSITION");
-    return bDisabled;
-}
-
-static bool VF_IsL88BoundaryBandsDisabled()
-{
-    static const bool bDisabled=VF_IsL88DiagnosticSwitchEnabled(
-        "VOXELFORGE_L88_DISABLE_BOUNDARY_BANDS")
-        ||VF_IsL88DiagnosticSwitchEnabled("VOXELFORGE_L86_DISABLE_PASSAGE_COMPOSITION");
-    return bDisabled;
-}
-
-static bool VF_IsL88AllowPassageAblationWalkabilityFailure()
-{
-    static const bool bEnabled=VF_IsL88DiagnosticSwitchEnabled(
-        "VOXELFORGE_L88_ALLOW_PASSAGE_ABLATION_WALKABILITY_FAILURE");
-    return bEnabled;
-}
-
-
 static bool VF_IsL98PassagePrepareTraceEnabled()
 {
-    static const bool bEnabled=VF_IsL88DiagnosticSwitchEnabled(
+    static const bool bEnabled=VF_IsDiagnosticEnvSwitchEnabled(
        "VOXELFORGE_L98_PASSAGE_PREP_TRACE");
    return bEnabled;
 }

 static bool VF_IsL130PassageReachProofAuditEnabled()
 {
-    static const bool bEnabled=VF_IsL88DiagnosticSwitchEnabled(
+    static const bool bEnabled=VF_IsDiagnosticEnvSwitchEnabled(
        "VOXELFORGE_L130_PASSAGE_REACH_PROOF_AUDIT");
    return bEnabled;
 }
@@ -327,18 +301,14 @@ public:
        {
            mayContainResolvedBoundaryBand_=shape.ResolvedBoundaryBandsIntersectSubvoxelRange(
                minimumSubvoxels_[2],maximumSubvoxels_[2]);
-            const bool disablePassageComposition=VF_IsL88PassageCompositionDisabled();
-            if(VF_IsL88BoundaryBandsDisabled())mayContainResolvedBoundaryBand_=false;
-            mayContainTransitionPassageFade_=!disablePassageComposition
-                &&shape.ResolvedTransitionPassageFadeIntersectsTileXY(
-                    minimumSubvoxels_,maximumSubvoxels_);
-            if(!disablePassageComposition)
-                featureIndices_=shape.BuildPassageFeatureTileList(
-                    minimumSubvoxels_,maximumSubvoxels_);
+            mayContainTransitionPassageFade_=shape.ResolvedTransitionPassageFadeIntersectsTileXY(
+                minimumSubvoxels_,maximumSubvoxels_);
+            featureIndices_=shape.BuildPassageFeatureTileList(
+                minimumSubvoxels_,maximumSubvoxels_);
            stampIndices_=shape.BuildStampTileList(minimumSubvoxels_,maximumSubvoxels_);
            cavernFeatureIndices_=shape.BuildCavernFeatureTileList(
                minimumSubvoxels_,maximumSubvoxels_);
-            passageRoutes_.assign(shape.ResolvedLayout&&!disablePassageComposition
+            passageRoutes_.assign(shape.ResolvedLayout
                ?shape.ResolvedLayout->passages.size():0,0);
            passageRouteSegments_.resize(passageRoutes_.size());
            for(const std::uint32_t featureIndex:featureIndices_)
@@ -1561,12 +1531,8 @@ public:
        // the generic stratum transition distance creates a discontinuity at a
        // mouth that crosses a wide transition band. Keep that opt-in field whole;
        // its host-rock value already supplies the ceiling and bedrock.
-        const bool disablePassageComposition=!nativeLattice
-            &&VF_IsL88PassageCompositionDisabled();
-        const bool disableBoundaryBands=!nativeLattice
-            &&VF_IsL88BoundaryBandsDisabled();
        float boundary=graphDensity;
-        if(!nativeLattice&&!disableBoundaryBands)
+        if(!nativeLattice)
        {
            VoxelForgeCore::Linux77Profiler::FScopedPhase l77BandsPhase(
                VoxelForgeCore::Linux77Profiler::EPhase::Bands);
@@ -1595,7 +1561,6 @@ public:
                ?bound->Resolved->passageCapabilities.hasNativeCaveField
                :bound->Resolved->passageCapabilities.hasNativeLatticeField))
        {
-            if(!disablePassageComposition)
            {
                VoxelForgeCore::Linux77Profiler::FScopedPhase l77PassagePhase(
                    VoxelForgeCore::Linux77Profiler::EPhase::Passage);
@@ -1626,7 +1591,6 @@ public:
                ELegacyFieldTerm::ComposerPassage);
            final=ApplyResolvedCavernFloorCaps(stamped,X,Y,Z);
        }
-        if(!disablePassageComposition)
        {
            VoxelForgeCore::Linux77Profiler::FScopedPhase l77PassagePhase(
                VoxelForgeCore::Linux77Profiler::EPhase::Passage);
@@ -2332,18 +2296,8 @@ public:
        const bool bPassageRoutesValid=!bValidatePassageRoutes||ValidatePassageRoutes();
        if(!bPassageRoutesValid)
        {
-            if(VF_IsL88PassageCompositionDisabled()
-                &&!VF_IsL88BoundaryBandsDisabled()
-                &&VF_IsL88AllowPassageAblationWalkabilityFailure())
-            {
-                std::printf("[L88PassageAblation] route walkability failed as expected; "
-                    "continuing only to measure passage-off/bands-on readiness\n");
-            }
-            else
-            {
-                Error="compiled shape world contains a solid passage centreline sample";
-                return false;
-            }
+            Error="compiled shape world contains a solid passage centreline sample";
+            return false;
        }
        Stats.PassageValidationSeconds=std::chrono::duration<double>(Clock::now()-Substage).count();
        Built=true;
@@ -0,0 +1,50 @@
+# Linux131 — current state and dead experiment cleanup
+
+Branch `wip/l131-current-state`, based on `cbbfd46`; Core evaluator remains v227. The root [`CURRENT-STATE.md`](../../../../CURRENT-STATE.md) consolidates the shipping behavior, current references, verification commands, open gaps, and closed proposals.
+
+## Removed
+
+- Removed `VOXELFORGE_L86_DISABLE_PASSAGE_COMPOSITION`, `VOXELFORGE_L88_DISABLE_PASSAGES`, `VOXELFORGE_L88_DISABLE_BOUNDARY_BANDS`, and `VOXELFORGE_L88_ALLOW_PASSAGE_ABLATION_WALKABILITY_FAILURE`. These only supported archived passage/boundary ablations in `Linux86/RunL86Ceiling.py`, `Linux87/RunL87Timeline.py`, and `Linux88/RunL88CeilingSplit.py`; no current `verify.py` gate or live comparison uses them. Passage feature selection, passage composition, and boundary bands now run on the normal path, and passage-route validation cannot be waived by the old ablation flag.
+- Removed the `VOXELFORGE_AUDIT_LEGACY_ROUTE_GRADE` block from `Standalone/Source/WorldAssemblyPrototype.h`. The source contained its only reference; no test, current tool, or report invoked it.
+- Kept route-candidate grading and all user-visible behavior. This cleanup adds no evaluator version or baseline change.
+
+## Switch and hook inventory
+
+### Environment switches in compiled Core/Source
+
+| Switch | Effect and consumer | Keep decision |
+|---|---|---|
+| `VOXELFORGE_L74_TIGHT_PROOF_CONTROL` | Proof negative control. `Linux74/FalsifierL74.py` and `Linux75/FalsifierL75.py`. | Keep for falsifier reproducibility; not a current fast-tier input. |
+| `VOXELFORGE_L75_TN_BLOCK_REGRESSION` | Fixed TunnelNetwork regression path in Core and mesher. `RunTnBlockRegressionL75.py` and `FalsifierL75.py`. | Keep; the regression tools still consume it. |
+| `VOXELFORGE_L98_PASSAGE_PREP_TRACE` | Emits preparation-stage timing/count data. `RunL98Hashes.py` and `RunL98ReuseCounts.py`. | Keep as a focused profiler for future preparation comparisons. |
+| `VOXELFORGE_L98_PASSAGE_REUSE_PROBE` | Compares the prepared projection with direct scalar queries. `RunL98ReuseCounts.py`. | Keep for exactness probes. |
+| `VOXELFORGE_L104_FAR_HIT_CACHE` | Selects indexed versus linear far-hit candidate lookup. `RunL104ReadinessPairs.py` and `RunL104ProbeStats.py`. | Keep for reproducible A/B comparisons; cache defaults on. |
+| `VOXELFORGE_L104_FAR_HIT_STATS` | Emits far-hit candidate/query counters. `RunL104ProbeStats.py`. | Keep for the measurement tool. |
+| `VOXELFORGE_L115_DENSITY_PROFILE` | Enables density and floor-query profiling. `RunL115DensityProbe.py`, `RunL119DensityProbe.py`, and `RunL125DensityProbe.py`. | Keep; these remain the focused floor-probe path. |
+| `VOXELFORGE_L130_PASSAGE_REACH_PROOF_AUDIT` | Checks passage proof/feature influence bounds. L130's reach audit and report. | Keep for reach changes and audit reproduction. |
+
+Archived runners also set `VOXELFORGE_L81_PASSAGE_BOUND_PADDING_VOXELS`, `VOXELFORGE_L86_PASSAGE_RESULT_CACHE`, `VOXELFORGE_L90_PASSAGE_BRICK_METRES`, `VOXELFORGE_L90_PASSAGE_CANDIDATE_CENSUS`, `VOXELFORGE_L90_PASSAGE_REACH_METRES`, `VOXELFORGE_L91_PASSAGE_SOURCE_FLOOR_VOXELS`, `VOXELFORGE_L93_PASSAGE_CARVE_REACH_METRES`, `VOXELFORGE_L98_PASSAGE_REUSE_COUNTS`, `VOXELFORGE_L114_DENSITY_PROFILE`, and `VOXELFORGE_L118_TAG_TIMING`. None has a compiled-source reader at `cbbfd46`; they are inert historical runner strings.
+
+### Other experiments, diagnostics, and legacy paths retained
+
+- **World-changing tunnel ablations:** all 14 `voxel.TunnelAblate*` controls remain (`CaveWarp`, `DetailOps`, `RoomSDF`, `TunnelSDF`, `TunnelCore`, `PassageCarving`, `PassageStructuralPosts`, `NativeFloor`, `Disturbances`, `OriginSpine`, `BoundarySeal`, `LandingPosts`, `XYEdgeSeal`, `PitChimneySDF`). The editor commandlet writes their resolved mask into export and result manifests; the archived `PERF-SAMPLED.md` and `WORK-NEXT.md` record their measurements. No current runner invokes an ablation. Keep for manifest attribution and historical reproduction; removing it needs a metadata migration. Source: [`VoxelDensityAblation.cpp`](../../../../Source/VoxelForge/Private/VoxelDensityAblation.cpp), [`VoxelForgeExploreCommandlet.cpp`](../../../../Source/VoxelForgeEditor/Private/VoxelForgeExploreCommandlet.cpp).
+- **Research fields:** `voxel.ResearchRedefinedDensityField`, `voxel.ResearchRedefinedDensityDetailScale`, `voxel.ResearchParameterizedCave`, and `voxel.ResearchParameterizedCaveSet` are default-off and used by `Tools/VoxelForgeTest.ps1` steps 2d/2e/2f. The region-eval commandlet consumes `SetResearchBrickBinningEnabled`, `SetResearchBrickRoomReachScale`, and `SetResearchRegionCacheWindowEnabled`; keep these editor-only experiment paths. Source: [`VoxelForgeRegionEvalExperiment.cpp`](../../../../Source/VoxelForgeEditor/Private/VoxelForgeRegionEvalExperiment.cpp), [`VoxelForgeTest.ps1`](../../../../Tools/VoxelForgeTest.ps1).
+- **Runtime profiling and trace:** `voxel.SampleStacks` still starts `FVoxelStackSampler` (the guarded `Tools/VoxelForgeTest.ps1 -SampleDensityStacks` path consumes it); `voxel.ProfileDensity`, `voxel.ProfileDensityFull`, `voxel.ProfileTileGeneration`, `voxel.ProfileCollisionCookStages`, and `voxel.PerfAttribution` remain opt-in. `voxel.StartupTraceFile`, `voxel.StartupTraceMaxTiles`, and `voxel.StartupTraceUntilEndPlay` feed the Unreal startup trace used by the arrival/movement runners. Keep. Build-time `VOXELFORGE_PROFILE_LEGACY_TERMS` (L76) and `VOXELFORGE_PROFILE_L77`/`--linux77-profile` (stack sampler and route census) remain in `Standalone/BuildLinux.sh` and Core.
+- **Standalone profiles and timelines:** retained `--profile-column-overlap`, `--profile-lod-work`, `--profile-passage-composer`, `--instrument-tile-drain`, `--cold-worker-timeline`, `--linux77-profile`, `--tls-probe=N`, `--tls-probe-touch=...`, and `--diagnostic-slow-shape-compile-ms=N`. The viewer's `--profile-attribution`, `--profile-detail-band`, and `--profile-far-column-overlap` remain. The L77 profiler, tile drain instrumentation, timelines, and TLS probe are measurement hooks; archived reports and runners still provide reproducible consumers.
+- **Standalone audits:** all source-advertised hooks remain: `--audit-ore-vein-yield`, `--audit-resolved-layout-boundaries`, `--audit-strate-transitions`, `--audit-resolved-layout-passages`, `--audit-heightfield-profile`, `--audit-motif-intervals`, `--audit-landmark-reachability`, `--audit-native-caves`, `--audit-native-lattice`, `--audit-surface-clearance`, `--audit-uniform-block-proofs`, `--audit-base-page-equivalence`, `--audit-route-parity`, `--audit-passage-tile-seams`, `--audit-passage-source-clamp`, `--audit-passage-carve-reach`, `--audit-tile-shape-readiness`, and the mesher's `--audit-raw-skirts`. `verify.py fast` consumes the current route, passage, block-proof, transition, native-field and negative-control subset; dedicated L37/L75/L125/L130 runners exercise the specialized audits. Keep the whole audit set.
+- **Evaluator A/B controls:** `voxel.FastIsFinite`, `voxel.UseFusedEvaluator`, `voxel.WormBlockSkip`, `voxel.TileCacheWindow` / its two minimum-LOD controls, `voxel.SpatialIndex`, `voxel.ChunkRoutingCache`, `voxel.UseOperatorBlock`, `voxel.CoreColumnCacheDirectMapped`, `voxel.CoreMCGradientMemoization`, `voxel.FloorRound1PassageProjectionCache`, `voxel.PlayerFitMemo`, `voxel.UseBlockEarlyOut`, `voxel.OuterClassifierMode`, and `voxel.SealedSolidProof` remain. They select optimized or comparison paths; the density block equivalence test explicitly forces `UseFusedEvaluator=0`, while most others are production defaults or historical measurement controls. `voxel.WormsForceOff` is a world-changing development measurement override. Kept; no current L131 gate changes them.
+- **Standalone A/B and geometry controls:** `--exact-midpoint-density-memo`, `--no-exact-midpoint-density-memo`, `--active-lane-batching`, `--proof-block-cells=N`, `--parallel-sign-edge-repair`, `--serial-sign-edge-repair`, and `--shape-helper-limit=8|12` remain. The L94 report documents serial edge repair; no current `verify.py` consumer was found for the other CLI A/B controls, so they remain pending a separately reviewed removal. `voxel.TilePostReachDebug`, `voxel.TilePostReachScale`, and `voxel.TileReachCostDiagnostics` remain for the tile-post-reach test; `voxel.TunnelMouthTrim` remains a development-only room-mouth geometry control. No L131 gate uses these.
+- `FLegacyGeneratorFieldAdapter` remains the Core fallback for unsupported generator/recipe combinations, and Unreal's Core switch remains default-off. `voxel.StreamingLegacyPendingResultCap=1` remains the L120–L123 admission negative control; `voxel.StreamingCoarseFirst` remains opt-in pending a rendered owner-plan check. `bStandaloneResearchRoundTunnels` and `bStandaloneResearchEnhancedWalls` remain consumed by the standalone viewer/Core adapter.
+
+## Checks
+
+- Clang 19 and GCC standalone builds passed with the L131 source stamp `5119cee164406856cbca496d160c0e0a8124ae2529fa7c0ebd51634a7c65a6cb`. `Standalone/BuildLinux.sh` applied the required CPU and address-space limits.
+- L80 timing: one warm-up per binary and five interleaved pairs in each of four strata × W8/W12 cells, comparing the pre-cleanup L130 binary with L131. Load was 0.81; CPU idle was 99.2%. Across 40 pairs per metric, mean relative change was −0.22% near-ready (95% CI −1.02% to +0.57%) and −0.29% whole-view (−1.04% to +0.46%); the intervals include zero. [Raw timing summary](../../../../Saved/Linux/l131/timing/summary.json).
+- Exact hashes: **24/24** owner4 SW/FI/TN/VS × Clang/GCC × W1/W8/W12 tile and whole-view identities; **18/18** canonical cases across owner4 SurfaceWorld and owner2 SurfaceWorld/FloatingIslands. All match the pre-cleanup L130 binary and agree across compiler/worker combinations. For transparency, forcing the owner4 dataset through `--recipe=floating-islands` exited during setup with “could not find a finite SurfaceWorld strate”, before hashing; it is not a valid canonical case. [Tile matrix](../../../../Saved/Linux/l131/hash-matrix/summary.json), [canonical matrix](../../../../Saved/Linux/l131/canonical-matrix/summary.json).
+- Walkability: **21,425/21,425** passage centerline samples open. Seam audit: **4 pairs / 4,900** shared samples, zero mismatches. [Audit log](../../../../Saved/Linux/l131/seam-audit.log).
+- Fast tier: **PASS**, 259 gated checks plus 5 diagnostics, 80 runs, 371.0 s. The five diagnostic-only comparisons are historical baselines; all required checks pass. [Summary](../../../../Saved/Linux/l131/fast-summary.json).
+- Linux `VFHostEditor`: **PASS**, 27/27 actions, 78.81 s with `-NoUBA -MaxParallelActions=4`, no `prlimit`. UBT's default log rotation first failed before compilation in the read-only user config directory; the successful rerun set `-Log=.../Saved/Linux/l131/ubt.log`. Three existing RealtimeMesh deprecation warnings remain. [Build log](../../../../Saved/Linux/l131/ue-build.log).
+- Unreal `Source/` files changed: **none**. No Windows compile is requested by this diff; Windows determinism remains unverified.
+- `git diff --check` passes. No commit, push, or stash was made.
+
+Builds, per-run logs, timing records, hash records, and audit output are under `Saved/Linux/l131/`.
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+"""Compare 18 canonical owner4/owner2 hashes with the pre-cleanup L130 binary."""
+from __future__ import annotations
+
+import json
+import re
+import subprocess
+import time
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l131/canonical-matrix"
+DATASETS = {
+    "owner4": ROOT / "Standalone/data/owner_world.json",
+    "owner2": ROOT / "Standalone/data/regression/owner_world_2strate_l61.json",
+}
+RECIPES = {"owner4": ("surface-world",), "owner2": ("surface-world", "floating-islands")}
+BINARIES = {
+    "base": ROOT / "Saved/Linux/l130/bin/VoxelForgeCoreHeadless-l130-{compiler}",
+    "l131": ROOT / "Saved/Linux/l131/bin/VoxelForgeCoreHeadless-l131-{compiler}",
+}
+HASH_RE = re.compile(r"^\[Pipeline(?:FullDetailHash|WholeViewHash|LODHash|ExactQueryHash)\].*$", re.M)
+
+
+def run(dataset: str, recipe: str, compiler: str, workers: int, version: str) -> tuple[list[str], float]:
+    binary = Path(str(BINARIES[version]).format(compiler=compiler))
+    label = f"{dataset}-{recipe}-{compiler}-w{workers}-{version}"
+    log = OUT / f"{label}.log"
+    command = ["taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--",
+        "timeout", "1740s", str(binary), str(DATASETS[dataset]),
+        "--world-assembler-prototype", "--stream-benchmark", "--stream-pipeline",
+        "--force-generate", f"--workers={workers}", "--clip-radius=3",
+        "--max-clip-level=8", "--max-level=8", f"--recipe={recipe}", "--stream-hash"]
+    started = time.monotonic()
+    with log.open("w", encoding="utf-8") as stream:
+        process = subprocess.run(command, cwd=ROOT, stdout=stream,
+            stderr=subprocess.STDOUT, check=False, timeout=1740)
+    hashes = HASH_RE.findall(log.read_text(encoding="utf-8", errors="replace"))
+    if process.returncode or len(hashes) != 12:
+        raise RuntimeError(f"hash run failed: {log}; exit={process.returncode}; rows={len(hashes)}")
+    return hashes, time.monotonic() - started
+
+
+def main() -> int:
+    OUT.mkdir(parents=True, exist_ok=True)
+    rows = []
+    groups = {}
+    for dataset, recipes in RECIPES.items():
+        for recipe in recipes:
+            signatures = []
+            for workers in (1, 8, 12):
+                for compiler in ("clang", "gcc"):
+                    before, before_s = run(dataset, recipe, compiler, workers, "base")
+                    after, after_s = run(dataset, recipe, compiler, workers, "l131")
+                    row = {"dataset": dataset, "recipe": recipe, "compiler": compiler,
+                        "workers": workers, "hash_mismatches": sum(a != b for a, b in zip(before, after)),
+                        "rows": len(after), "base_s": round(before_s, 3), "l131_s": round(after_s, 3),
+                        "base_log": f"Saved/Linux/l131/canonical-matrix/{dataset}-{recipe}-{compiler}-w{workers}-base.log",
+                        "l131_log": f"Saved/Linux/l131/canonical-matrix/{dataset}-{recipe}-{compiler}-w{workers}-l131.log"}
+                    rows.append(row)
+                    signatures.append((compiler, workers, after))
+                    print("[L131CanonicalHash] " + json.dumps(row, sort_keys=True), flush=True)
+                    (OUT / "runs-partial.json").write_text(json.dumps(rows, indent=2) + "\n")
+            first = signatures[0][2]
+            stable = all(sig == first for _, _, sig in signatures)
+            groups[f"{dataset}/{recipe}"] = {"base_equals_l131": all(row["hash_mismatches"] == 0 for row in rows if row["dataset"] == dataset and row["recipe"] == recipe),
+                "all_clang_gcc_workers_agree": stable}
+    failures = [row for row in rows if row["hash_mismatches"]]
+    (OUT / "summary.json").write_text(json.dumps({"runs": rows, "groups": groups,
+        "passed": len(rows)-len(failures), "failed": len(failures)}, indent=2) + "\n")
+    return 1 if failures or not all(group["all_clang_gcc_workers_agree"] for group in groups.values()) else 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+"""Compare 24 owner4 tile-hash cases with the pre-cleanup L130 binary."""
+from __future__ import annotations
+
+import json
+import re
+import subprocess
+import time
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l131/hash-matrix"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINARIES = {
+    "base": ROOT / "Saved/Linux/l130/bin/VoxelForgeCoreHeadless-l130-{compiler}",
+    "l131": ROOT / "Saved/Linux/l131/bin/VoxelForgeCoreHeadless-l131-{compiler}",
+}
+CAMERAS = {
+    "sw": ((8.0, 16.0, -372.2626953125), 2850),
+    "fi": ((25.8369140625, 3.19921875, -737.0), 2249),
+    "tn": ((19.166015625, -14.2001953125, -753.3740234375), 2233),
+    "vs": ((-20.0625, -5.068359375, -900.353515625), 2329),
+}
+TILE_RE = re.compile(
+    r"^\[PipelineTileHash\] lod=(-?\d+) x=(-?\d+) y=(-?\d+) z=(-?\d+) "
+    r"density=(0x[0-9a-f]+) mesh=(0x[0-9a-f]+) payload=(0x[0-9a-f]+) "
+    r"topology=(0x[0-9a-f]+)$", re.M)
+WHOLE_RE = re.compile(
+    r"^\[PipelineWholeViewHash\] tiles=(\d+) density=(0x[0-9a-f]+) "
+    r"mesh=(0x[0-9a-f]+) payload=(0x[0-9a-f]+) topology=(0x[0-9a-f]+)$", re.M)
+
+
+def capture(camera_name: str, compiler: str, workers: int, version: str) -> tuple[dict, tuple[str, ...], float]:
+    camera, expected_tiles = CAMERAS[camera_name]
+    camera_arg = ",".join(f"{value:.12f}" for value in camera) + ",0,0"
+    binary = Path(str(BINARIES[version]).format(compiler=compiler))
+    log = OUT / f"owner4-{camera_name}-{compiler}-w{workers}-{version}.log"
+    command = ["taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--",
+        "timeout", "1740s", str(binary), str(DATA), "--world-assembler-prototype",
+        "--stream-benchmark", "--stream-pipeline", f"--workers={workers}",
+        "--clip-radius=3", "--max-clip-level=8", "--max-level=8",
+        f"--camera={camera_arg}", "--stream-hash-tiles"]
+    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)
+    elapsed = time.monotonic() - started
+    output = log.read_text(encoding="utf-8", errors="replace")
+    tiles = {(int(match.group(1)), int(match.group(2)), int(match.group(3)), int(match.group(4))):
+             match.group(5, 6, 7, 8) for match in TILE_RE.finditer(output)}
+    whole = WHOLE_RE.search(output)
+    if result.returncode or whole is None or len(tiles) != expected_tiles or len(tiles) != int(whole.group(1)):
+        raise RuntimeError(f"incomplete {version} {camera_name}/{compiler}/W{workers}: {log}")
+    return tiles, whole.groups(), elapsed
+
+
+def main() -> int:
+    OUT.mkdir(parents=True, exist_ok=True)
+    rows = []
+    for camera_name in CAMERAS:
+        for compiler in ("clang", "gcc"):
+            for workers in (1, 8, 12):
+                old_tiles, old_whole, old_s = capture(camera_name, compiler, workers, "base")
+                new_tiles, new_whole, new_s = capture(camera_name, compiler, workers, "l131")
+                keys = set(old_tiles) | set(new_tiles)
+                tile_mismatches = sum(old_tiles.get(key) != new_tiles.get(key) for key in keys)
+                row = {"owner": "owner4", "camera": camera_name, "compiler": compiler,
+                    "workers": workers, "tiles": len(new_tiles),
+                    "tile_mismatches": tile_mismatches,
+                    "whole_view_match": old_whole == new_whole,
+                    "base_s": round(old_s, 3), "l131_s": round(new_s, 3),
+                    "base_log": f"Saved/Linux/l131/hash-matrix/owner4-{camera_name}-{compiler}-w{workers}-base.log",
+                    "l131_log": f"Saved/Linux/l131/hash-matrix/owner4-{camera_name}-{compiler}-w{workers}-l131.log"}
+                rows.append(row)
+                print("[L131HashIdentity] " + json.dumps(row, sort_keys=True), flush=True)
+                (OUT / "runs-partial.json").write_text(json.dumps(rows, indent=2) + "\n")
+    failures = [row for row in rows if row["tile_mismatches"] or not row["whole_view_match"]]
+    (OUT / "summary.json").write_text(json.dumps({"runs": rows, "passed": len(rows)-len(failures),
+        "failed": len(failures)}, indent=2) + "\n")
+    return 1 if failures else 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+"""Five interleaved L80 readiness measurements per stratum and worker count."""
+from __future__ import annotations
+
+import json
+import os
+import re
+import statistics
+import subprocess
+import time
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[4]
+OUT = ROOT / "Saved/Linux/l131/timing"
+DATA = ROOT / "Standalone/data/owner_world.json"
+BINARIES = {
+    "base": ROOT / "Saved/Linux/l130/bin/VoxelForgeCoreHeadless-l130-clang",
+    "l131": ROOT / "Saved/Linux/l131/bin/VoxelForgeCoreHeadless-l131-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),
+}
+PIPELINE_RE = re.compile(r"^\[StreamPipeline\] (.*)$", re.M)
+FIELDS_RE = re.compile(r"([a-zA-Z0-9_]+)=([^ ]+)")
+NEAR_RE = re.compile(r"^\[WorldAssemblerNearLODReady\] lods=0-2 tiles=(\d+)/(\d+) cold_ready_s=([0-9.]+)$", re.M)
+
+
+def run(strate: int, workers: int, version: str, phase: str, replicate: int) -> dict:
+    camera = ",".join(f"{value:.12f}" for value in CAMERAS[strate]) + ",0,0"
+    label = f"s{strate}-w{workers}-{version}-{phase}{replicate}-l131-v227"
+    log = OUT / f"{label}.log"
+    command = ["taskset", "-c", "0-11", "prlimit", "--as=6442450944", "--",
+        "timeout", "1740s", str(BINARIES[version]), str(DATA),
+        "--world-assembler-prototype", "--stream-benchmark", "--stream-pipeline",
+        f"--workers={workers}", "--clip-radius=3", "--max-clip-level=8",
+        "--max-level=8", f"--camera={camera}", "--profile-lod-work",
+        "--stream-scheduler-policy=3"]
+    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)
+    content = log.read_text(encoding="utf-8", errors="replace")
+    pipeline, near = PIPELINE_RE.search(content), NEAR_RE.search(content)
+    if result.returncode or pipeline is None or near is None:
+        raise RuntimeError(f"timing run failed: {log}; exit={result.returncode}")
+    fields = dict(FIELDS_RE.findall(pipeline.group(1)))
+    row = {"strate": strate, "workers": workers, "version": version,
+        "phase": phase, "replicate": replicate,
+        "lod02_ready_s": float(near.group(3)),
+        "whole_view_ready_s": float(fields["whole_view_ready"].removesuffix("s")),
+        "wall_s": round(time.monotonic() - started, 3),
+        "log": str(log.relative_to(ROOT))}
+    print("[L131TimingRun] " + json.dumps(row, sort_keys=True), flush=True)
+    return row
+
+
+def quiet_machine() -> tuple[float, float]:
+    load_1m = os.getloadavg()[0]
+    def totals() -> tuple[int, int]:
+        fields = Path("/proc/stat").read_text().splitlines()[0].split()
+        values = [int(value) for value in fields[1:]]
+        return sum(values), values[3] + (values[4] if len(values) > 4 else 0)
+    before = totals()
+    time.sleep(2.0)
+    after = totals()
+    idle = 100.0 * (after[1] - before[1]) / max(1, after[0] - before[0])
+    return load_1m, idle
+
+
+def main() -> int:
+    if any(not path.is_file() for path in (DATA, *BINARIES.values())):
+        raise SystemExit("missing timing input")
+    OUT.mkdir(parents=True, exist_ok=True)
+    load_1m, idle = quiet_machine()
+    (OUT / "machine-load-before.txt").write_text(
+        f"1-minute load: {load_1m:.2f}\n2-second CPU idle: {idle:.1f}%\n")
+    print(f"[L131TimingGate] load_1m={load_1m:.2f} cpu_idle_2s={idle:.1f}%", flush=True)
+    if load_1m >= 0.9 or idle < 97.0:
+        raise SystemExit("timing refused: machine is above the L80 quiet-load gate")
+
+    rows = []
+    for strate in range(4):
+        for workers in (8, 12):
+            for version in BINARIES:
+                rows.append(run(strate, workers, version, "warmup", 0))
+            for replicate in range(1, 6):
+                order = tuple(BINARIES) if replicate % 2 else tuple(reversed(BINARIES))
+                for version in order:
+                    rows.append(run(strate, workers, version, "measured", replicate))
+                    (OUT / "runs-partial.json").write_text(json.dumps(rows, indent=2) + "\n")
+
+    measured = [row for row in rows if row["phase"] == "measured"]
+    summary = []
+    for strate in range(4):
+        for workers in (8, 12):
+            old = [row for row in measured if row["strate"] == strate and row["workers"] == workers and row["version"] == "base"]
+            new = [row for row in measured if row["strate"] == strate and row["workers"] == workers and row["version"] == "l131"]
+            item = {"strate": strate, "workers": workers, "replicates_per_version": 5}
+            for key in ("lod02_ready_s", "whole_view_ready_s"):
+                old_med, new_med = statistics.median(row[key] for row in old), statistics.median(row[key] for row in new)
+                item[f"base_{key}_median"] = old_med
+                item[f"l131_{key}_median"] = new_med
+                item[f"delta_pct_{key}"] = round(100.0 * (new_med / old_med - 1.0), 2)
+                item[f"base_{key}_values"] = [row[key] for row in old]
+                item[f"l131_{key}_values"] = [row[key] for row in new]
+            summary.append(item)
+    (OUT / "summary.json").write_text(json.dumps({"runs": rows, "summary": summary}, indent=2) + "\n")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
@@ -2566,15 +2566,9 @@ namespace StandaloneStreamBenchmark
        ShapeRequest.detail=DetailVariant;ShapeRequest.includeFarWorld=bIncludeFarWorld&&!bDeferFarWorld;
        ShapeRequest.roundTunnels=bRoundTunnels;
        ShapeRequest.enhancedTunnelWalls=bEnhancedTunnelWalls;
-        const char* L86DisablePassages=std::getenv(
-            "VOXELFORGE_L86_DISABLE_PASSAGE_COMPOSITION");
-        const bool bL86DisablePassages=L86DisablePassages
-            &&L86DisablePassages[0]=='1'&&L86DisablePassages[1]=='\0';
-        ShapeRequest.validatePassageRoutes=!bCaptureSkipWalkability&&!bL86DisablePassages;
+        ShapeRequest.validatePassageRoutes=!bCaptureSkipWalkability;
        if(bCaptureSkipWalkability)
            std::printf("[CaptureWalkabilityGate] validation=deferred geometry_input=unchanged mode=mesh-export\n");
-        if(bL86DisablePassages)
-            std::printf("[L86PassageCeiling] validation=skipped geometry=passage_composition_disabled diagnostic_only=true\n");
        FStandaloneStreamingGenerator Streamer(World,WorkerCount,bHashDensity,nullptr,MaxLevel,
            bSkipUvAndColors,bSkipMaterialGroups,bSkipUV,bSkipColors,&Shape,bProfileColumnOverlap,
            FarHorizonLOD8InteriorStepVoxels,bUseSharedColumnCache,
@@ -153,80 +153,6 @@ namespace StandaloneWorldAssemblyPrototype
            candidateCenterSpacing=32;
        }
        const double coreVoxelMetres=static_cast<double>(coreVoxelSizeMicrons)/1000000.0;
-        if(std::getenv("VOXELFORGE_AUDIT_LEGACY_ROUTE_GRADE"))
-        {
-            constexpr std::int32_t legacyCenterSpacing=64;
-            constexpr std::int32_t legacyWaypointSpacing=8;
-            std::array<GradeSegmentAudit,32> legacySegments{};
-            std::uint64_t legacyGradeFailCandidates=0;
-            double legacyMinimumGround=std::numeric_limits<double>::infinity();
-            double legacyMaximumGround=-std::numeric_limits<double>::infinity();
-            for(std::int32_t centerY=-256;centerY<=256;centerY+=legacyCenterSpacing)
-            for(std::int32_t centerX=-256;centerX<=256;centerX+=legacyCenterSpacing)
-            for(const Direction& direction:directions)
-            {
-                bool candidateGradeFail=false;
-                std::int64_t previousGround=0,previousX=0,previousY=0;
-                for(std::int32_t index=0;index<=32;++index)
-                {
-                    const std::int64_t along=(index-16)*legacyWaypointSpacing;
-                    const std::int64_t x=centerX+std::llround(
-                        static_cast<double>(along)*direction.x/65536.0);
-                    const std::int64_t y=centerY+std::llround(
-                        static_cast<double>(along)*direction.y/65536.0);
-                    const auto column=finalField.point(WorldAssemblyFixed(static_cast<double>(x)),
-                        WorldAssemblyFixed(static_cast<double>(y)),0);
-                    const double groundMetres=static_cast<double>(column.groundHeightSubvoxels)
-                        *coreVoxelMetres/WorldAssemblySubvoxelsPerVoxel;
-                    legacyMinimumGround=std::min(legacyMinimumGround,groundMetres);
-                    legacyMaximumGround=std::max(legacyMaximumGround,groundMetres);
-                    if(index>0)
-                    {
-                        const std::int64_t horizontalQ=static_cast<std::int64_t>(std::llround(
-                            std::hypot(static_cast<double>(x-previousX),
-                                static_cast<double>(y-previousY))*WorldAssemblySubvoxelsPerVoxel));
-                        const std::int64_t riseQ=std::abs(
-                            column.groundHeightSubvoxels-previousGround);
-                        if(horizontalQ==0||riseQ*65536>horizontalQ*GradeQ16)
-                        {
-                            candidateGradeFail=true;
-                            GradeSegmentAudit& segment=legacySegments[
-                                static_cast<std::size_t>(index-1)];
-                            ++segment.failures;
-                            const double grade=horizontalQ>0
-                                ?static_cast<double>(riseQ)/static_cast<double>(horizontalQ)
-                                :std::numeric_limits<double>::infinity();
-                            if(grade>segment.maximumGrade)
-                            {
-                                segment.maximumGrade=grade;
-                                segment.fromGround=previousGround;
-                                segment.toGround=column.groundHeightSubvoxels;
-                                segment.fromX=previousX;segment.fromY=previousY;
-                                segment.toX=x;segment.toY=y;
-                            }
-                        }
-                    }
-                    previousGround=column.groundHeightSubvoxels;previousX=x;previousY=y;
-                }
-                if(candidateGradeFail)++legacyGradeFailCandidates;
-            }
-            std::printf("[WorldAssemblerLegacyRouteGradeProfile] candidates=648 grade_fail_candidates=%llu ground_range_m=%.3f..%.3f grade_limit_deg=15.000 chord_m=%.3f waypoint_step_m=%.3f center_step_m=%.3f\n",
-                static_cast<unsigned long long>(legacyGradeFailCandidates),
-                legacyMinimumGround,legacyMaximumGround,256.0*coreVoxelMetres,
-                legacyWaypointSpacing*coreVoxelMetres,legacyCenterSpacing*coreVoxelMetres);
-            const double metresPerSubvoxel=coreVoxelMetres/WorldAssemblySubvoxelsPerVoxel;
-            for(std::size_t segmentIndex=0;segmentIndex<legacySegments.size();++segmentIndex)
-            {
-                const GradeSegmentAudit& segment=legacySegments[segmentIndex];
-                if(segment.failures==0)continue;
-                std::printf("[WorldAssemblerLegacyRouteGradeSegment] index=%zu rejected_candidates=%llu max_grade_deg=%.3f ground_m=%.3f->%.3f xy_m=(%.3f,%.3f)->(%.3f,%.3f)\n",
-                    segmentIndex,static_cast<unsigned long long>(segment.failures),
-                    std::atan(segment.maximumGrade)*57.29577951308232,
-                    segment.fromGround*metresPerSubvoxel,segment.toGround*metresPerSubvoxel,
-                    segment.fromX*coreVoxelMetres,segment.fromY*coreVoxelMetres,
-                    segment.toX*coreVoxelMetres,segment.toY*coreVoxelMetres);
-            }
-        }
        std::printf("[WorldAssemblerRouteCandidateEnvelope] max_chord_m=%.3f length_variants=%zu center_step_m=%.3f arrival_radius_m=%.3f departure_radius_m=%.3f\n",
            2.0*candidateHalfLengths.front()*coreVoxelMetres,candidateHalfLengths.size(),
            candidateCenterSpacing*coreVoxelMetres,