feat: add generated scene skill platform hardening

docs/superpowers/plans/2026-04-19-post-g7-boundary-decision-roadmap-plan.md

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+# Post-G7 Boundary Decision Roadmap Plan
+
+> Date: 2026-04-19
+> Status: Draft
+> Upstream Spec: [2026-04-19-post-g7-boundary-decision-roadmap-design.md](D:/data/ideaSpace/rust/sgClaw/claw-new/docs/superpowers/specs/2026-04-19-post-g7-boundary-decision-roadmap-design.md)
+
+## Plan Intent
+
+This roadmap determines the next bounded step after `G7` has already closed as the first boundary-family executed real sample.
+
+Its only purpose is:
+
+`decide whether G6 or G8 may enter real-sample execution scope next, or whether both remain held pending prerequisites`
+
+## Scope Guardrails
+
+1. do not reopen `G7`
+2. do not reopen `G1-E / G2 / G3`
+3. do not implement runtime-platform prerequisites under this roadmap
+4. do not execute real samples for more than one remaining boundary family
+5. do not open `G4 / G5`
+
+## Candidate Directions
+
+The only remaining directions under this roadmap are:
+
+1. `G6`
+2. `G8`
+3. `prerequisites-only hold`
+
+## Workstreams
+
+1. `WS1` Freeze the Post-G7 Starting State
+2. `WS2` Compare G6 and G8 Entry Cost
+3. `WS3` Select One Next Direction
+4. `WS4` Publish the Next Bounded Slice
+
+## Phase 0: Freeze the Starting State
+
+### Objective
+
+Lock the roadmap start point so the decision cannot drift back into closed work.
+
+### Tasks
+
+1. freeze `G7` as closed executed-pass
+2. freeze `G6` and `G8` as the only remaining boundary candidates
+3. freeze `G1-E / G2 / G3` as closed
+4. freeze `G4 / G5` as out of scope
+
+### Deliverables
+
+1. starting-state note
+2. fixed candidate list
+
+### Acceptance Criteria
+
+1. no closed family is reopened under this roadmap
+
+## Phase 1: Compare the Remaining Boundary Candidates
+
+### Objective
+
+Compare `G6` and `G8` using explicit entry cost and prerequisite pressure.
+
+### Tasks
+
+1. restate the current hold condition for `G6`
+2. restate the current hold condition for `G8`
+3. compare which one requires the smaller new capability to enter real-sample scope
+4. compare whether either direction is still too expensive and should remain held
+
+### Deliverables
+
+1. `G6 vs G8` comparison matrix
+2. smallest-next-step summary
+
+### Acceptance Criteria
+
+1. the preferred next direction is justified explicitly
+2. the non-selected direction has an explicit hold reason
+
+## Phase 2: Select One Next Direction
+
+### Objective
+
+Reduce the post-`G7` ambiguity to one bounded decision.
+
+### Tasks
+
+1. select exactly one direction:
+   - `G6`
+   - `G8`
+   - or `prerequisites-only hold`
+2. record why the other directions remain out of scope
+
+### Deliverables
+
+1. post-`G7` boundary decision
+2. hold reasons for non-selected directions
+
+### Acceptance Criteria
+
+1. only one next direction is opened
+2. the decision is bounded and defensible
+
+## Phase 3: Publish the Next Bounded Slice
+
+### Objective
+
+Turn the decision into the next executable bounded artifact.
+
+### Tasks
+
+1. if `G6` is selected, write a bounded `G6 real-sample entry` design and plan
+2. if `G8` is selected, write a bounded `G8 real-sample entry` design and plan
+3. if `prerequisites-only hold` is selected, write a bounded prerequisites roadmap
+4. publish a roadmap closure report
+
+### Deliverables
+
+1. next bounded `design`
+2. next bounded `plan`
+3. roadmap closure report
+
+### Acceptance Criteria
+
+1. the next step is ready without extending this roadmap
+2. only one bounded direction is emitted
+
+## Completion Criteria
+
+This roadmap is complete when:
+
+1. the post-`G7` next step is reduced to one bounded direction
+2. `G6` and `G8` no longer compete ambiguously
+3. a single follow-up `design + plan` exists for the selected direction
+
+## Next Step
+
+After this roadmap completes:
+
+1. execute the selected bounded slice
+2. do not reopen this roadmap during execution