feat: add generated scene skill platform hardening

docs/superpowers/reports/2026-04-18-g1e-candidate-batch-alignment-report.md

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+# G1-E Candidate Batch Alignment Report
+
+## Scope
+
+This round keeps the roadmap inside the `G1-E` Track B and Track D boundary.
+
+It does not add a third `G1-E` implementation sample. It converts the already validated representative plus first expansion state into a formal candidate-batch asset.
+
+## Delivered
+
+Added or updated:
+
+1. `tests/fixtures/generated_scene/g1e_candidate_batch_2026-04-18.json`
+2. `tests/g1e_candidate_batch_test.rs`
+3. `tests/fixtures/generated_scene/p1_family_manifest.json`
+4. `tests/fixtures/generated_scene/p1_family_results.json`
+5. `tests/fixtures/generated_scene/scene_ledger_status_2026-04-18.json`
+6. `tests/scene_ledger_status_test.rs`
+
+## Batch Meaning
+
+The batch asset now freezes the current `G1-E` status as:
+
+1. one promoted baseline
+2. one promoted expansion
+3. one queued downstream candidate
+
+This keeps `G1-E` aligned with the same family-asset shape already used by `G2` and `G3`, without forcing unsupported expansion beyond the current evidence.
+
+## Validation
+
+Passed:
+
+1. `cargo test --test g1e_candidate_batch_test -- --nocapture`
+2. `cargo test --test scene_generator_p1_family_test -- --nocapture`
+3. `cargo test --test scene_ledger_status_test -- --nocapture`
+4. `cargo test --test scene_generator_family_policy_test -- --nocapture`
+
+## Outcome
+
+`G1-E` now has:
+
+1. representative baseline
+2. promoted expansion baseline
+3. formal candidate batch
+4. synchronized Track E ledger overlay status
+
+That completes the same core asset shape for the three roadmap mainline families:
+
+1. `G1-E`
+2. `G2`
+3. `G3`