feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-19-boundary-family-entry-decision-report.md

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+# Boundary Family Entry Decision Report
+
+> Date: 2026-04-19
+> Roadmap: [2026-04-19-boundary-family-real-sample-entry-roadmap-plan.md](D:/data/ideaSpace/rust/sgClaw/claw-new/docs/superpowers/plans/2026-04-19-boundary-family-real-sample-entry-roadmap-plan.md)
+
+## Decision
+
+One boundary family is selected as the next real-sample entry candidate:
+
+1. `G7`
+
+The other boundary families remain held:
+
+1. `G6`
+2. `G8`
+
+## Comparison Result
+
+### G6
+
+`G6` already has a code-backed minimum runtime contract, but the next real-sample step would require host bridge execution semantics.
+
+That prerequisite is still too platform-shaped for the smallest bounded next slice.
+
+### G7
+
+`G7` already has a minimal runnable runtime contract and only lacks real multi-endpoint aggregation verification.
+
+Among `G6/G7/G8`, this is the smallest next capability gap.
+
+So `G7` is selected.
+
+### G8
+
+`G8` already has a code-backed minimum runtime contract, but the next real-sample step still depends on local document pipeline runtime and attachment handling.
+
+That remains heavier than the bounded next-step budget.
+
+## Result
+
+The roadmap now has one bounded next direction:
+
+1. `G7 real-sample entry`
+
+This report does not execute a real sample yet.
+
+It only closes the boundary-family priority ambiguity.