diff --git a/tests/golden/M16-GAP-00282/task-context.json b/tests/golden/M16-GAP-00282/task-context.json
new file mode 100644
index 00000000..706be5e4
--- /dev/null
+++ b/tests/golden/M16-GAP-00282/task-context.json
@@ -0,0 +1,182 @@
+{
+  "schemaVersion": 1,
+  "task": "M16-GAP-00282",
+  "parentTask": "M16-GAP-00281",
+  "status": "in_progress",
+  "goal": "Make the same minimal fixture produce observable operator:asset.screenshot_preview data in Blender desktop and WASM/Main, with save/reopen stability. Change only this gap; do not expand to other data-blocks, editors, or browsers.",
+  "scope": {
+    "gap": "operator:asset.screenshot_preview",
+    "ownerFamily": "OPERATOR",
+    "implementationClass": "LOCAL_EXACT"
+  },
+  "commands": [
+    "build_blender_5.2.0/bin/blender -b --factory-startup --python tools/web/generated/M16-GAP-00282.py -- tests/files/web/generated/M16-GAP-00282-operator-asset.screenshot_preview.blend",
+    "npm --prefix web run test:generated-gap -- --task M16-GAP-00282",
+    "node tools/web/check-generated-gap.mjs --task M16-GAP-00282"
+  ],
+  "inputPaths": [],
+  "inputSelection": {
+    "schemaVersion": 1,
+    "limits": {
+      "maxFiles": 12,
+      "evidenceBytes": 8192,
+      "contextRemainingBytes": 1425,
+      "contextRemainingTokens": 355
+    },
+    "source": {
+      "bytes": 8479,
+      "tokens": 2121
+    },
+    "selected": [],
+    "excluded": [
+      {
+        "path": "tests/files/web/generated/M16-GAP-00282-operator-asset.screenshot_preview.blend",
+        "bytes": null,
+        "reason": "MISSING_PATH"
+      },
+      {
+        "path": "tools/web/generated/M16-GAP-00282.py",
+        "bytes": null,
+        "reason": "MISSING_PATH"
+      },
+      {
+        "path": "blender-5.2.0/source/blender/web_engine/web_engine_blend_reader.cpp",
+        "bytes": 242091,
+        "reason": "EVIDENCE_BYTE_BUDGET"
+      },
+      {
+        "path": "tools/web/check-generated-gap.mjs",
+        "bytes": 849534,
+        "reason": "EVIDENCE_BYTE_BUDGET"
+      },
+      {
+        "path": "tests/golden/M16-GAP-00282/",
+        "bytes": null,
+        "reason": "GENERATED_EVIDENCE_OUTPUT"
+      },
+      {
+        "path": "docs/status/M16-GAP-00282.md",
+        "bytes": null,
+        "reason": "GENERATED_EVIDENCE_OUTPUT"
+      },
+      {
+        "path": "tests/golden/M16-GAP-00282/manifest.json",
+        "bytes": null,
+        "reason": "GENERATED_EVIDENCE_OUTPUT"
+      }
+    ],
+    "totals": {
+      "files": 0,
+      "bytes": 0,
+      "tokens": 0
+    }
+  },
+  "exitCriteria": [
+    "desktop fixture evidence exists",
+    "WASM uses the same fixture",
+    "comparator passes",
+    "save/reopen preserves Main",
+    "manifest hashes all artifacts"
+  ],
+  "nextTask": "M16-GAP-00283",
+  "sourceDocuments": {
+    "queue": "docs/EXECUTION_QUEUE.md",
+    "taskCard": "docs/tasks/M16-GAP-00282.md",
+    "taskIndex": "tests/golden/M15-03A/task-index.json",
+    "parentManifest": "tests/golden/M16-GAP-00281/manifest.json",
+    "parentStatus": "docs/status/M16-GAP-00281.md"
+  },
+  "readPolicy": {
+    "required": [
+      "docs/EXECUTION_QUEUE.md",
+      "docs/tasks/M16-GAP-00282.md",
+      "tests/golden/M16-GAP-00281/manifest.json",
+      "docs/status/M16-GAP-00281.md"
+    ],
+    "machineOnly": [
+      "tests/golden/M15-03A/task-index.json",
+      "tests/golden/M15-03A/task-catalog.jsonl"
+    ],
+    "optionalByNeed": [
+      "docs/WEB_BLENDER_MODELER_V1_SCOPE.md",
+      "任务卡列出的精确协议/生产路径",
+      "任务卡明确命名的长期计划小节"
+    ],
+    "forbiddenByDefault": [
+      "完整 CURRENT_EXECUTION_PLAN.md",
+      "完整 PROJECT_STATUS_AND_NEXT_WORK.md",
+      "全部 docs/status/*.md",
+      "完整 parity/WBS 计划",
+      "README 历史和 test-results/"
+    ]
+  },
+  "parent": {
+    "manifest": {
+      "schemaVersion": 1,
+      "task": "M16-GAP-00281",
+      "parentTask": "M16-GAP-00280",
+      "status": "done",
+      "nextTask": "M16-GAP-00282",
+      "artifactCount": 17
+    },
+    "statusSummary": [
+      "# M16-GAP-00281 Status",
+      "status: done",
+      "task: asset.open_containing_blend_file operator LOCAL_EXACT slice",
+      "updated: 2026-08-24 America/New_York",
+      "scope:",
+      "- The minimal fixture links one object from external `WebGapOpenContaining.blend`.",
+      "  Blender desktop observes the no-selected-asset boundary as `poll=false`, records",
+      "  `CANCELLED` for `asset.open_containing_blend_file`, and confirms no Main mutation."
+    ]
+  },
+  "budgets": {
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+    "taskBytes": 1809,
+    "parentManifestBytes": 24576,
+    "parentStatusBytes": 6144,
+    "evidenceFiles": 12,
+    "evidenceBytes": 8192,
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+    "taskTokens": 453
+  },
+  "size": {
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+        "bytes": 2495,
+        "lines": 47,
+        "tokens": 624
+      },
+      {
+        "path": "docs/tasks/M16-GAP-00282.md",
+        "bytes": 1809,
+        "lines": 38,
+        "tokens": 453
+      },
+      {
+        "path": "tests/golden/M16-GAP-00281/manifest.json",
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+        "lines": 31,
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+        "path": "docs/status/M16-GAP-00281.md",
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+        "lines": 28,
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+      }
+    ],
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+    "evidenceBytes": 0,
+    "evidenceTokens": 0,
+    "totalTokens": 2121,
+    "reservedEnvelopeTokens": 1024,
+    "estimatedContextTokens": 3145,
+    "serializedContextTokens": 719,
+    "withinBudget": true
+  }
+}