diff --git a/apps/control-station/src/core/laboratory/m49TgsFullShadow.ts b/apps/control-station/src/core/laboratory/m49TgsFullShadow.ts
index 0853824..be1fd60 100644
--- a/apps/control-station/src/core/laboratory/m49TgsFullShadow.ts
+++ b/apps/control-station/src/core/laboratory/m49TgsFullShadow.ts
@@ -1,6 +1,7 @@
 import type { LaboratoryFetch } from "./advancedResults";
 
 const RESULT_ID = /^m49-tgs-full-shadow-[a-f0-9]{64}$/;
+const SEMANTIC_RESULT_ID = /^e47-semantic-slam-[a-f0-9]{64}$/;
 
 export type M49TgsFullShadowStateCode = 0 | 1 | 2 | 3;
 
@@ -10,6 +11,7 @@ export interface M49TgsFullShadowResult {
   source: {
     sourcePackSha256: string;
     linkedVisualResultId: string;
+    linkedSemanticResultId: string;
   };
   configuration: {
     configSha256: string;
@@ -158,12 +160,20 @@ export async function fetchM49TgsFullShadowResult(
   const performance = objectValue(payload.performance, "M49 full performance");
   const acceptance = objectValue(payload.acceptance, "M49 full acceptance");
   const decision = objectValue(payload.decision, "M49 full decision");
+  const linkedSemanticResultId = text(
+    source.linked_semantic_result_id,
+    "M49 full semantic result",
+  );
+  if (!SEMANTIC_RESULT_ID.test(linkedSemanticResultId)) {
+    throw new M49TgsFullShadowContractError("M49 full semantic result: нарушена идентичность.");
+  }
   return {
     resultId: text(payload.result_id, "M49 full result"),
     createdAtUtc: text(payload.created_at_utc, "M49 full created"),
     source: {
       sourcePackSha256: text(source.source_pack_sha256, "M49 full source pack"),
       linkedVisualResultId: text(source.linked_visual_result_id, "M49 full visual result"),
+      linkedSemanticResultId,
     },
     configuration: {
       configSha256: text(configuration.config_sha256, "M49 full config"),
diff --git a/apps/control-station/src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx b/apps/control-station/src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx
index 4c97c99..4c5d34a 100644
--- a/apps/control-station/src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx
+++ b/apps/control-station/src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx
@@ -4,6 +4,10 @@ import type {
   RecordedEvidenceSemanticClass,
   RecordedEvidenceSemanticPaletteEntry,
 } from "../../components/laboratory/RecordedEvidenceSemanticMaskOverlay";
+import {
+  fetchE47SemanticSlamResult,
+  type E47SemanticSlamResult,
+} from "../../core/laboratory/e47SemanticSlam";
 import {
   fetchM49TgsFullShadowSpatialChunk,
   type M49TgsFullShadowResult,
@@ -46,6 +50,8 @@ function message(error: unknown): string {
 
 export function M49TgsFullShadowEvidence({ result }: { result: M49TgsFullShadowResult }) {
   const [activeSequence, setActiveSequence] = useState<number | null>(null);
+  const [semantic, setSemantic] = useState<E47SemanticSlamResult | null>(null);
+  const [semanticError, setSemanticError] = useState<string | null>(null);
   const [chunks, setChunks] = useState<ReadonlyMap<number, M49TgsFullShadowSpatialChunk>>(
     () => new Map(),
   );
@@ -57,6 +63,27 @@ export function M49TgsFullShadowEvidence({ result }: { result: M49TgsFullShadowR
   const activeChunkStartRef = useRef(activeChunkStart);
   activeChunkStartRef.current = activeChunkStart;
 
+  useEffect(() => {
+    const controller = new AbortController();
+    setSemantic(null);
+    setSemanticError(null);
+    void fetchE47SemanticSlamResult({
+      resultId: result.source.linkedSemanticResultId,
+      signal: controller.signal,
+    })
+      .then((next) => {
+        if (controller.signal.aborted) return;
+        if (!next || next.baseM4ResultId !== result.source.linkedVisualResultId) {
+          throw new Error("Semantic archive не совпал с исходным M4 timeline.");
+        }
+        setSemantic(next);
+      })
+      .catch((caught: unknown) => {
+        if (!controller.signal.aborted) setSemanticError(message(caught));
+      });
+    return () => controller.abort();
+  }, [result.source.linkedSemanticResultId, result.source.linkedVisualResultId]);
+
   useEffect(() => {
     for (const controller of inFlightRef.current.values()) controller.abort();
     inFlightRef.current.clear();
@@ -142,23 +169,34 @@ export function M49TgsFullShadowEvidence({ result }: { result: M49TgsFullShadowR
   }, []);
 
   return (
-    <M4ReplayThreatVisual
-      resultId={result.source.linkedVisualResultId}
-      showReviewAnchorBoxes={false}
-      reviewLabel="4 489 source-paced TGS frames"
-      evidenceLabel="M49 · full TGS shadow"
-      initialSpatialMode="3d"
-      onActiveSequenceChange={handleSequenceChange}
-      classifiedSpatialLayer={{
-        label: "TGS full shadow · causal rolling 1 s",
-        pointLayerLabel: "SOURCE POINTS",
-        cellLayerLabel: "TGS COSTMAP",
-        expectedAtSequence: true,
-        frame: classifiedFrame,
-        loading,
-        error,
-        replacePointCloud: false,
-      }}
-    />
+    <>
+      <M4ReplayThreatVisual
+        resultId={result.source.linkedVisualResultId}
+        semantic={semantic ? {
+          resultId: semantic.resultId,
+          taxonomy: semantic.taxonomy,
+        } : undefined}
+        showReviewAnchorBoxes={false}
+        reviewLabel="4 489 source-paced TGS frames"
+        evidenceLabel="M49 · full TGS shadow"
+        initialSpatialMode="3d"
+        onActiveSequenceChange={handleSequenceChange}
+        classifiedSpatialLayer={{
+          label: "TGS full shadow · causal rolling 1 s",
+          pointLayerLabel: "SOURCE POINTS",
+          cellLayerLabel: "TGS COSTMAP",
+          expectedAtSequence: true,
+          frame: classifiedFrame,
+          loading,
+          error,
+          replacePointCloud: false,
+        }}
+      />
+      {semanticError ? (
+        <div className="m4-replay-threat-visual__pane-status" role="alert">
+          Semantic overlay недоступен: {semanticError}
+        </div>
+      ) : null}
+    </>
   );
 }
diff --git a/apps/control-station/src/workspaces/laboratory/M4ReplayThreatVisual.tsx b/apps/control-station/src/workspaces/laboratory/M4ReplayThreatVisual.tsx
index a880072..6bab793 100644
--- a/apps/control-station/src/workspaces/laboratory/M4ReplayThreatVisual.tsx
+++ b/apps/control-station/src/workspaces/laboratory/M4ReplayThreatVisual.tsx
@@ -409,6 +409,17 @@ export function M4ReplayThreatVisual({
   const classifiedSpatialFrame = classifiedSpatialLayer?.frame?.sourceSequence === timelineFrame.activeSequence
     ? classifiedSpatialLayer?.frame ?? null
     : null;
+  const lastClassifiedSpatialFrameRef = useRef<{
+    resultId: string;
+    frame: M4ReplayClassifiedSpatialFrame;
+  } | null>(null);
+  if (classifiedSpatialLayer?.frame) {
+    lastClassifiedSpatialFrameRef.current = { resultId, frame: classifiedSpatialLayer.frame };
+  }
+  const displayedClassifiedSpatialFrame = classifiedSpatialFrame
+    ?? (lastClassifiedSpatialFrameRef.current?.resultId === resultId
+      ? lastClassifiedSpatialFrameRef.current.frame
+      : null);
   const replaceClassifiedPointCloud = classifiedSpatialLayer?.replacePointCloud ?? true;
   const nominalSensorHeightM = metadata.timeline?.rig.nominalSensorHeightM ?? 0;
   const mapGravityLocalSensorToBodyGround = useCallback((
@@ -425,13 +436,13 @@ export function M4ReplayThreatVisual({
     return [rotated[0], rotated[1], rotated[2] + nominalSensorHeightM];
   }, [activeSpatialFrame?.bodyFrame?.basisMapFromBody, nominalSensorHeightM]);
   const classifiedPointsBody = useMemo(
-    () => classifiedSpatialFrame?.pointsMapGravityLocalXyzM.map(
+    () => displayedClassifiedSpatialFrame?.pointsMapGravityLocalXyzM.map(
       mapGravityLocalSensorToBodyGround,
     ) ?? [],
-    [classifiedSpatialFrame, mapGravityLocalSensorToBodyGround],
+    [displayedClassifiedSpatialFrame, mapGravityLocalSensorToBodyGround],
   );
   const classifiedCellsBody = useMemo<readonly LaboratoryMetricCellEvidence[]>(
-    () => classifiedSpatialFrame?.cellsMapGravityLocal.map((cell) => {
+    () => displayedClassifiedSpatialFrame?.cellsMapGravityLocal.map((cell) => {
       const body = mapGravityLocalSensorToBodyGround([
         cell.centerXyM[0],
         cell.centerXyM[1],
@@ -451,7 +462,7 @@ export function M4ReplayThreatVisual({
         state: cell.state,
       };
     }) ?? [],
-    [classifiedSpatialFrame, mapGravityLocalSensorToBodyGround, nominalSensorHeightM],
+    [displayedClassifiedSpatialFrame, mapGravityLocalSensorToBodyGround, nominalSensorHeightM],
   );
   const classifiedCellCounts = useMemo(() => ({
     ground: classifiedSpatialFrame?.cellsMapGravityLocal.filter(
@@ -641,6 +652,16 @@ export function M4ReplayThreatVisual({
       >
         {classifiedSpatialLayer.pointLayerLabel}
       </Button>
+      <Button
+        size="compact"
+        shape="pill"
+        variant={showLocalSurface ? "primary" : "secondary"}
+        aria-pressed={showLocalSurface}
+        title="Bounded local SLAM surface · visual-derived"
+        onClick={() => setShowLocalSurface((visible) => !visible)}
+      >
+        LOCAL SLAM
+      </Button>
       <Button
         size="compact"
         shape="pill"
@@ -650,6 +671,17 @@ export function M4ReplayThreatVisual({
       >
         {classifiedSpatialLayer.cellLayerLabel}
       </Button>
+      {semantic ? (
+        <Button
+          size="compact"
+          shape="pill"
+          variant={showSpatialSemantic ? "primary" : "secondary"}
+          aria-pressed={showSpatialSemantic}
+          onClick={() => setShowSpatialSemantic((visible) => !visible)}
+        >
+          SEMANTICS
+        </Button>
+      ) : null}
     </div>
   ) : (
     <div
@@ -952,38 +984,38 @@ export function M4ReplayThreatVisual({
             </div>
           </div>
         ) : null}
-        {(!classifiedSpatialLayer ? spatialFrame : classifiedSpatialFrame) ? (
+        {(!classifiedSpatialLayer ? spatialFrame : displayedClassifiedSpatialFrame) ? (
           <LaboratoryMetricEvidenceScene
             ref={metricSceneRef}
-            pointCloudBodyXyzM={classifiedSpatialFrame && replaceClassifiedPointCloud
+            pointCloudBodyXyzM={displayedClassifiedSpatialFrame && replaceClassifiedPointCloud
               ? classifiedPointsBody
               : activeSpatialFrame?.pointCloudBodyXyzM ?? []}
-            localSurfaceBodyXyzM={classifiedSpatialFrame ? [] : localSurface.pointsBodyXyzM}
-            obstacles={classifiedSpatialFrame ? [] : sceneObstacles}
+            localSurfaceBodyXyzM={localSurface.pointsBodyXyzM}
+            obstacles={displayedClassifiedSpatialFrame ? [] : sceneObstacles}
             rig={timeline.rig}
             corridor={timeline.corridor}
-            occupiedVoxelSizeM={classifiedSpatialFrame?.cellSizeM ?? timeline.occupiedVoxelSizeM}
+            occupiedVoxelSizeM={displayedClassifiedSpatialFrame?.cellSizeM ?? timeline.occupiedVoxelSizeM}
             mode={spatialMode}
             label={`${evidenceLabel} exact current increment, bounded local SLAM surface and rolling occupancy`}
             showCurrentIncrement={showCurrentIncrement}
-            showLocalSurface={classifiedSpatialFrame ? false : showLocalSurface}
+            showLocalSurface={showLocalSurface}
             showRollingMap={showRollingMap}
-            showLowStep={classifiedSpatialFrame ? false : showLowStep}
-            pointSemanticClassIds={classifiedSpatialFrame && replaceClassifiedPointCloud
-              ? classifiedSpatialFrame.pointClassIds
+            showLowStep={displayedClassifiedSpatialFrame ? false : showLowStep}
+            pointSemanticClassIds={displayedClassifiedSpatialFrame && replaceClassifiedPointCloud
+              ? displayedClassifiedSpatialFrame.pointClassIds
               : alignedSemanticPointIds}
-            semanticClasses={classifiedSpatialFrame && replaceClassifiedPointCloud
-              ? classifiedSpatialFrame.classes
+            semanticClasses={displayedClassifiedSpatialFrame && replaceClassifiedPointCloud
+              ? displayedClassifiedSpatialFrame.classes
               : semanticClasses}
-            semanticPalette={classifiedSpatialFrame && replaceClassifiedPointCloud
-              ? classifiedSpatialFrame.palette
+            semanticPalette={displayedClassifiedSpatialFrame && replaceClassifiedPointCloud
+              ? displayedClassifiedSpatialFrame.palette
               : semanticPalette}
             classifiedCells={classifiedCellsBody}
-            classifiedCellSizeM={classifiedSpatialFrame?.cellSizeM}
+            classifiedCellSizeM={displayedClassifiedSpatialFrame?.cellSizeM}
             showClassifiedCells={showRollingMap}
           />
         ) : null}
-        {classifiedSpatialLayer && !classifiedSpatialFrame ? (
+        {classifiedSpatialLayer && !displayedClassifiedSpatialFrame ? (
           <div className="l3-visual-audit__state" role={classifiedSpatialLayer.error ? "alert" : "status"}>
             {classifiedSpatialLayer.loading || displayingBufferedFrame
               ? <span className="busy-indicator" aria-hidden="true" />
diff --git a/apps/control-station/test/m49TgsFullShadow.test.mjs b/apps/control-station/test/m49TgsFullShadow.test.mjs
index 9d55401..498e4a5 100644
--- a/apps/control-station/test/m49TgsFullShadow.test.mjs
+++ b/apps/control-station/test/m49TgsFullShadow.test.mjs
@@ -74,12 +74,22 @@ test("M4.9T5 chunk keeps every missing-LiDAR cell explicitly UNOBSERVED", async
 });
 
 test("M4.9T5 viewer prefetches 24-frame immutable chunks", async () => {
-  const source = await readFile(
-    new URL("../src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx", import.meta.url),
-    "utf8",
-  );
+  const [source, contract] = await Promise.all([
+    readFile(
+      new URL("../src/workspaces/laboratory/M49TgsFullShadowEvidence.tsx", import.meta.url),
+      "utf8",
+    ),
+    readFile(
+      new URL("../src/core/laboratory/m49TgsFullShadow.ts", import.meta.url),
+      "utf8",
+    ),
+  ]);
   assert.match(source, /const CHUNK_FRAMES = 24/);
   assert.match(source, /activeChunkStart \+ CHUNK_FRAMES/);
   assert.match(source, /fetchM49TgsFullShadowSpatialChunk/);
   assert.match(source, /sampleAvailable: spatial\.sampleAvailable/);
+  assert.match(source, /fetchE47SemanticSlamResult/);
+  assert.match(source, /next\.baseM4ResultId !== result\.source\.linkedVisualResultId/);
+  assert.match(source, /semantic=\{semantic \? \{/);
+  assert.match(contract, /linked_semantic_result_id/);
 });
diff --git a/apps/control-station/test/m4ReplayThreat.test.mjs b/apps/control-station/test/m4ReplayThreat.test.mjs
index 9c1d309..795f92d 100644
--- a/apps/control-station/test/m4ReplayThreat.test.mjs
+++ b/apps/control-station/test/m4ReplayThreat.test.mjs
@@ -801,12 +801,15 @@ test("M4.6 viewer keeps media and spatial panes on one playback clock", async ()
   assert.match(visual, /showLocalSurface/);
   assert.match(
     visual,
-    /pointCloudBodyXyzM=\{classifiedSpatialFrame && replaceClassifiedPointCloud[\s\S]*\? classifiedPointsBody[\s\S]*: activeSpatialFrame\?\.pointCloudBodyXyzM \?\? \[\]\}/,
+    /pointCloudBodyXyzM=\{displayedClassifiedSpatialFrame && replaceClassifiedPointCloud[\s\S]*\? classifiedPointsBody[\s\S]*: activeSpatialFrame\?\.pointCloudBodyXyzM \?\? \[\]\}/,
   );
   assert.match(
     visual,
-    /const activeSpatialFrame = spatialFrame\?\.sequence === timelineFrame\.activeSequence[\s\S]*const classifiedSpatialFrame = classifiedSpatialLayer\?\.frame\?\.sourceSequence === timelineFrame\.activeSequence/,
+    /const classifiedSpatialFrame = classifiedSpatialLayer\?\.frame\?\.sourceSequence === timelineFrame\.activeSequence[\s\S]*const displayedClassifiedSpatialFrame = classifiedSpatialFrame[\s\S]*lastClassifiedSpatialFrameRef/,
   );
+  assert.match(visual, /localSurfaceBodyXyzM=\{localSurface\.pointsBodyXyzM\}/);
+  assert.match(visual, /showLocalSurface=\{showLocalSurface\}/);
+  assert.match(visual, /\{semantic \? \([\s\S]*>\s*SEMANTICS\s*<\/Button>/);
   assert.match(visual, /все 2 244 TGS-ячейки явно UNOBSERVED/);
   assert.match(
     visual,
diff --git a/experiments/perception/M49_TGS_FULL_SHADOW_ACCEPTANCE_2026-08-26.md b/experiments/perception/M49_TGS_FULL_SHADOW_ACCEPTANCE_2026-08-26.md
index 9eee2f4..5f674eb 100644
--- a/experiments/perception/M49_TGS_FULL_SHADOW_ACCEPTANCE_2026-08-26.md
+++ b/experiments/perception/M49_TGS_FULL_SHADOW_ACCEPTANCE_2026-08-26.md
@@ -20,13 +20,14 @@ correct for vegetation, terrain, gaps or the future vehicle envelope.
 
 | Item | Identity |
 | --- | --- |
-| LAB result | `m49-tgs-full-shadow-0faeaaf3aba8dccae974eab51ff9cccf264a13ec285abb1920c1e5a09a7e87bc` |
+| LAB result | `m49-tgs-full-shadow-ef98de7db7596d48e8c8c0549ce68e6704ee03e87c8c4bcf1e3e748b7ccb032e` |
 | Worker run | `Worker 006 / ravnoves00-full-001` |
 | Mission Core revision used by Worker | `40c850b167dda366d8aa45d828520168affaf9fd` |
 | Deterministic Worker artifact | `5e0ea16c7a5cc760463836718b0cd8b0006ffc4b202e5f706a20a86ef2f912ab` |
 | Source pack SHA-256 | `0685d24219d8236caf8b7f1685e93f6d6b59e7fd015a768d88a92bbe8b154944` |
 | TGS config SHA-256 | `c2e07010aaee78259d36c057962d6bfb885349251ff7356d867e5813e632881c` |
 | Linked visual result | `m4-threat-replay-2a953c5f27f2a5b1dddc5c658c1de2c323d7796084a099c024987a1da03aa324` |
+| Linked semantic result | `e47-semantic-slam-f8c53ba12e9719856195890c7dcd2ba6c114434674159f948064368012e6b3bc` |
 
 The profile is a `0.45 m`, `12 m` radius, `1 s` causal rolling
 `map-gravity-local` costmap. The four states remain separate:
@@ -62,7 +63,9 @@ source points. This preserves chronology without inventing free space.
 
 The immutable result is published on the canonical Mission Core service at
 port `8000`. The LAB reuses the recorded camera timeline and exposes independent
-`SOURCE POINTS`, `TGS COSTMAP`, `3D` and `PLAN` controls.
+`SOURCE POINTS`, `LOCAL SLAM`, `TGS COSTMAP`, `SEMANTICS`, `3D` and `PLAN`
+controls. The semantic mask is the exact E47 full-route archive bound to the
+same M4 camera result; it remains diagnostic and does not change TGS states.
 
 The first implementation fetched one large JSON frame at a time. Browser QA
 showed that this was only intermittently exact at `1×`. The published viewer
@@ -73,6 +76,14 @@ showed the loading placeholder. A real missing-LiDAR frame was separately
 accepted with `0 source points`, `2,244 unobserved`, `0 occupied` and no retained
 previous cloud.
 
+A follow-up playback acceptance fixed a UI lifecycle defect that remounted the
+Three.js scene while the next TGS frame crossed the React buffer boundary. The
+scene now retains the last sealed classified frame until the exact next frame
+arrives, so orbit controls and the operator-selected view survive continuous
+playback. Twelve consecutive `250 ms` playback samples kept one mounted 3D
+canvas, a visible bounded `LOCAL SLAM` surface and the synchronized E47 video
+mask. Pausing is no longer required to rotate, pan or zoom the 3D view.
+
 ## Sealed evidence
 
 | File | Bytes | SHA-256 |
diff --git a/src/k1link/laboratory/m49_tgs_full_shadow.py b/src/k1link/laboratory/m49_tgs_full_shadow.py
index aa416bc..f007c30 100644
--- a/src/k1link/laboratory/m49_tgs_full_shadow.py
+++ b/src/k1link/laboratory/m49_tgs_full_shadow.py
@@ -79,6 +79,7 @@ def seal_m49_tgs_full_shadow(
     destination_root: Path,
     profile_path: Path,
     linked_visual_result_id: str,
+    linked_semantic_result_id: str,
     created_at_utc: str | None = None,
 ) -> M49TgsFullShadowResult:
     source = source_root.expanduser().resolve(strict=True)
@@ -115,6 +116,11 @@ def seal_m49_tgs_full_shadow(
         or len(linked_visual_result_id) != len("m4-threat-replay-") + 64
     ):
         raise M49TgsFullShadowError("linked visual result is invalid")
+    if (
+        not linked_semantic_result_id.startswith("e47-semantic-slam-")
+        or len(linked_semantic_result_id) != len("e47-semantic-slam-") + 64
+    ):
+        raise M49TgsFullShadowError("linked semantic result is invalid")
     for name in EVIDENCE_FILES:
         path = source / name
         proof = worker.get("files", {}).get(name, {})
@@ -131,6 +137,7 @@ def seal_m49_tgs_full_shadow(
         "input_manifest_sha256": worker["input_manifest_sha256"],
         "config_sha256": worker["config_sha256"],
         "linked_visual_result_id": linked_visual_result_id,
+        "linked_semantic_result_id": linked_semantic_result_id,
         "files": {name: worker["files"][name]["sha256"] for name in EVIDENCE_FILES},
         "authority": {
             "commands_enabled": False,
@@ -154,6 +161,7 @@ def seal_m49_tgs_full_shadow(
             "source_session_id": "20260720T065719Z_viewer_live",
             "source_pack_sha256": worker["source_pack_sha256"],
             "linked_visual_result_id": linked_visual_result_id,
+            "linked_semantic_result_id": linked_semantic_result_id,
         },
         "configuration": {
             "profile_id": profile["profile_id"],
@@ -211,6 +219,7 @@ def seal_m49_tgs_full_shadow(
         "visual_review": {
             "instrument": "m4-canonical-reference-graph",
             "linked_visual_result_id": linked_visual_result_id,
+            "linked_semantic_result_id": linked_semantic_result_id,
             "frame_count": 4489,
             "state_codes": profile["state_codes"],
         },
diff --git a/tests/test_m49_tgs_full_shadow.py b/tests/test_m49_tgs_full_shadow.py
index b0baab2..e0d3e2b 100644
--- a/tests/test_m49_tgs_full_shadow.py
+++ b/tests/test_m49_tgs_full_shadow.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import hashlib
 import importlib.util
 import json
 import sys
@@ -7,6 +8,7 @@ from pathlib import Path
 
 import numpy as np
 
+from k1link.laboratory.m49_tgs_full_shadow import seal_m49_tgs_full_shadow
 from k1link.web import m49_tgs_full_shadow_api as full_shadow_api
 
 REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
@@ -59,6 +61,76 @@ def test_full_shadow_worker_artifact_is_deterministic_and_cpu_only(tmp_path: Pat
     assert "gpu_requested = $false" in runner_text
 
 
+def test_full_shadow_seal_binds_visual_and_semantic_timelines(tmp_path: Path) -> None:
+    source = tmp_path / "worker"
+    source.mkdir()
+    files: dict[str, dict[str, object]] = {}
+    for name in (
+        "costmap-cell-centers-xy-m.npy",
+        "costmap-cell-indices-xy.npy",
+        "costmap-states.npy",
+        "costmap-z-bounds-m.npy",
+        "frames.ndjson",
+    ):
+        payload = f"sealed:{name}\n".encode()
+        (source / name).write_bytes(payload)
+        files[name] = {
+            "bytes": len(payload),
+            "sha256": hashlib.sha256(payload).hexdigest(),
+        }
+    worker = {
+        "schema_version": "missioncore.m49-tgs-full-shadow-result/v1",
+        "status": "passed",
+        "source_pack_sha256": "a" * 64,
+        "input_manifest_sha256": "b" * 64,
+        "config_sha256": "c" * 64,
+        "timeline": {
+            "frame_count": 4489,
+            "available_lidar_frame_count": 3928,
+            "missing_lidar_frame_count": 561,
+        },
+        "point_accounting": {"unaccounted": 0},
+        "costmap": {"cell_size_m": 0.45, "radius_m": 12.0},
+        "performance": {},
+        "acceptance": {},
+        "files": files,
+    }
+    (source / "result.json").write_text(json.dumps(worker), encoding="utf-8")
+    (source / "worker-summary.json").write_text(json.dumps({
+        "schema_version": "missioncore.m49-tgs-full-shadow-worker-summary/v1",
+        "gpu_requested": False,
+        "aos_used": False,
+        "all_timeline_frames_accounted": True,
+        "all_eligible_points_accounted": True,
+        "canonical_triton_health": "healthy",
+        "canonical_triton_id": "triton",
+        "wall_seconds": 1.0,
+    }), encoding="utf-8")
+    profile = tmp_path / "profile.json"
+    profile.write_text(json.dumps({
+        "schema_version": "missioncore.m49-tgs-full-shadow-profile/v1",
+        "profile_id": "test",
+        "profile": {"history_seconds": 1.0},
+        "costmap": {"state_priority": ["NONGROUND_OCCUPIED"]},
+        "state_codes": {"UNOBSERVED": 0},
+    }), encoding="utf-8")
+    visual = "m4-threat-replay-" + "d" * 64
+    semantic = "e47-semantic-slam-" + "e" * 64
+
+    sealed = seal_m49_tgs_full_shadow(
+        source_root=source,
+        destination_root=tmp_path / "results",
+        profile_path=profile,
+        linked_visual_result_id=visual,
+        linked_semantic_result_id=semantic,
+        created_at_utc="2026-08-26T20:27:19Z",
+    )
+
+    assert sealed.report["source"]["linked_visual_result_id"] == visual
+    assert sealed.report["source"]["linked_semantic_result_id"] == semantic
+    assert sealed.manifest["identity"]["linked_semantic_result_id"] == semantic
+
+
 def test_full_shadow_chunk_contract_keeps_missing_lidar_unobserved(
     monkeypatch,
     tmp_path: Path,