# G6 Host-Bridge Execution Semantics Plan

> Date: 2026-04-19
> Status: Draft
> Upstream Spec: [2026-04-19-g6-host-bridge-execution-semantics-design.md](D:/data/ideaSpace/rust/sgClaw/claw-new/docs/superpowers/specs/2026-04-19-g6-host-bridge-execution-semantics-design.md)

## Plan Intent

This plan executes one bounded next slice:

`G6 host-bridge execution semantics`

## Scope Guardrails

1. do not execute a `G6` real sample
2. do not implement host-runtime directly
3. do not open `G8`
4. do not reopen `G7`
5. do not open `G4 / G5`

## Workstreams

1. `WS1` Freeze the semantic boundary
2. `WS2` Separate bridge invocation from callback completion
3. `WS3` Publish one bounded semantic result

## Phase 0: Freeze the Boundary

### Objective

Lock the plan to semantic scoping only.

### Tasks

1. freeze `G6` as the only target
2. freeze real execution and implementation as out of scope

### Acceptance Criteria

1. no host-runtime implementation begins under this plan

## Phase 1: Separate the Minimum Semantics

### Objective

Turn the blocked capability into explicit bounded semantics.

### Tasks

1. isolate bridge action invocation semantics
2. isolate callback completion semantics
3. keep both separate from broader host-runtime work

### Acceptance Criteria

1. the semantic model is explicit and bounded

## Phase 2: Publish the Bounded Result

### Objective

Turn the semantic model into one bounded next artifact.

### Tasks

1. publish the semantic result
2. if needed, publish the next bounded follow-up plan

### Acceptance Criteria

1. the next step remains narrower than direct host-runtime implementation