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claw/docs/superpowers/specs/2026-04-19-boundary-runtime-prerequisites-roadmap-design.md

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# Boundary Runtime Prerequisites Roadmap Design
> Date: 2026-04-19
> Status: Draft
> Upstream Decision: [2026-04-19-post-g7-boundary-decision-report.md](D:/data/ideaSpace/rust/sgClaw/claw-new/docs/superpowers/reports/2026-04-19-post-g7-boundary-decision-report.md)
## 1. Intent
This design defines the next bounded slice after the post-`G7` boundary decision selects `prerequisites-only hold`.
The target is:
`boundary runtime prerequisites roadmap`
## 2. Why This Direction
This direction is selected because:
1. `G7` is already closed and should not be reopened
2. `G6` still depends on stronger host-bridge real execution semantics
3. `G8` still depends on local document runtime and attachment handling
4. forcing either family into execution now would exceed the bounded next-step budget
## 3. Scope Boundary
This design is limited to prerequisite scoping only.
It may include:
1. separating `G6` prerequisite pressure from `G8` prerequisite pressure
2. defining the minimum prerequisite slice needed before either family can enter real-sample scope
3. selecting one bounded prerequisite direction
It must not include:
1. executing `G6` or `G8`
2. implementing host-runtime or local-doc runtime directly
3. reopening `G7`
4. reopening `G1-E / G2 / G3`
5. opening `G4 / G5`
## 4. Target Outcome
The bounded target outcome is one of two states:
1. a selected prerequisite direction for `G6`
2. or a selected prerequisite direction for `G8`
The design rejects direct family execution under this slice.
## 5. Exit Condition
This design is complete when implementation can be bounded to one roadmap that:
1. compares `G6` and `G8` prerequisite burden directly
2. selects exactly one prerequisite direction
3. publishes one bounded follow-up plan