feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-18-roadmap-execution-status-report.md

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+# Roadmap Execution Status Report
+
+## Scope
+
+This round continues executing the remaining in-plan work from `2026-04-17-scene-skill-60-to-90-roadmap-plan.md`.
+
+It does not create new family contracts. It records the current roadmap execution state after `G1-E`, `G2`, and `G3` were all promoted into the same family-asset shape.
+
+## Delivered
+
+Added:
+
+1. `tests/fixtures/generated_scene/roadmap_execution_status_2026-04-18.json`
+2. `tests/roadmap_execution_status_test.rs`
+
+## Current Plan Position
+
+The roadmap is now recorded as:
+
+1. `Phase 0 = completed`
+2. `Phase 1 = completed`
+3. `Phase 2 = completed`
+4. `Phase 3 = completed`
+5. `Phase 4 = in_progress`
+
+Within `Phase 4`, the current track status is:
+
+1. `Track A / G2 = batch-expansion-promoted`
+2. `Track B / G1-E = batch-expansion-promoted`
+3. `Track C / G3 = batch-expansion-promoted`
+4. `Track D = in_progress`
+5. `Track E = status-overlay-established`
+
+## Why This Asset Exists
+
+At this point, the repo already has:
+
+1. family policy assets
+2. family result assets
+3. frozen ledger snapshot assets
+4. current ledger overlay assets
+5. family candidate-batch assets for all mainline families
+
+The roadmap still needed one status asset that states, in one place, where the plan currently stands and what remains queued or deferred.
+
+## Validation
+
+Passed:
+
+1. `cargo test --test roadmap_execution_status_test -- --nocapture`
+2. `cargo test --test scene_ledger_status_test -- --nocapture`
+3. `cargo test --test scene_generator_family_policy_test -- --nocapture`
+
+## Outcome
+
+The roadmap now has a repo-local execution-status asset that makes the remaining in-plan work explicit:
+
+1. continue from queued mainline candidates
+2. keep Track E overlays synchronized
+3. do not reopen already completed P0 and family-baseline work