claw/docs/superpowers/specs/2026-04-19-host-bridge-runtime-roadmap-design.md

Host-Bridge Runtime Roadmap Design

Date: 2026-04-19 Parent Sequence: 2026-04-19-final-2-residual-child-plan-sequence-plan.md Fixed Scene: sweep-085-scene

Intent

Close or narrow the remaining host-bridge runtime residual without resurrecting the old G6 semantics micro-plan chain.

Fixed Scope

Only sweep-085-scene is in scope.

Minimal Success Definition

The scene must either:

1. become framework-auto-pass-candidate; or
2. remain framework-structured-fail-closed with a narrower named host-bridge runtime hold.

Forbidden Scope

1. no general host-runtime transport implementation
2. no new G6 semantics micro-plan
3. no changes to G1-E/G2/G3 routes
4. no new family