generated-scene: add scheduled monitoring runtime and helper lifecycle hardening

tests/fixtures/generated_scene/boundary_runtime_prerequisites_decision_2026-04-19.json

@@ -0,0 +1,50 @@
+{
+  "decisionDate": "2026-04-19",
+  "scope": "boundary-runtime-prerequisites-roadmap",
+  "startingState": {
+    "boundaryClosed": [
+      "G7"
+    ],
+    "boundaryHeld": [
+      "G6",
+      "G8"
+    ],
+    "mainlineClosed": [
+      "G1-E",
+      "G2",
+      "G3"
+    ],
+    "deferredOutOfScope": [
+      "G4",
+      "G5"
+    ]
+  },
+  "comparisonMatrix": [
+    {
+      "direction": "G6-host-bridge-prerequisites",
+      "blockedCapability": "host bridge real-sample execution semantics",
+      "isolationCost": "medium",
+      "decision": "selected",
+      "reason": "It concentrates on one prerequisite line and is narrower than the combined local-doc plus attachment burden."
+    },
+    {
+      "direction": "G8-local-doc-prerequisites",
+      "blockedCapability": "local document runtime and attachment handling",
+      "isolationCost": "high",
+      "decision": "hold",
+      "reason": "It still combines local pipeline runtime and attachment handling, which is broader than the next bounded slice should absorb."
+    }
+  ],
+  "selectedDirection": {
+    "direction": "G6-host-bridge-prerequisites",
+    "nextDesign": "docs/superpowers/specs/2026-04-19-g6-host-bridge-prerequisites-design.md",
+    "nextPlan": "docs/superpowers/plans/2026-04-19-g6-host-bridge-prerequisites-plan.md"
+  },
+  "holdReasons": [
+    "G8 remains held because local document runtime and attachment handling still form a heavier prerequisite bundle than G6 host-bridge semantics."
+  ],
+  "notes": [
+    "The roadmap selects one prerequisite direction only.",
+    "No boundary family execution is opened under this roadmap."
+  ]
+}