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claw/docs/superpowers/plans/2026-04-19-g6-host-bridge-callback-semantics-plan.md

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# G6 Host-Bridge Callback Semantics Plan
> Date: 2026-04-19
> Status: Draft
> Upstream Spec: [2026-04-19-g6-host-bridge-callback-semantics-design.md](D:/data/ideaSpace/rust/sgClaw/claw-new/docs/superpowers/specs/2026-04-19-g6-host-bridge-callback-semantics-design.md)
## Plan Intent
This plan executes one bounded next slice:
`G6 host-bridge callback 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 callback semantics scope
2. `WS2` Define completion-state semantics
3. `WS3` Publish one bounded callback-semantic result
## Phase 0: Freeze the Boundary
### Objective
Lock the plan to callback semantics only.
### Tasks
1. freeze `G6` as the only target
2. freeze transport/runtime implementation and real execution as out of scope
### Acceptance Criteria
1. no broader host-runtime work begins under this plan
## Phase 1: Define Completion-State Semantics
### Objective
Turn callback completion into an explicit bounded semantic model.
### Tasks
1. define `ok`
2. define `partial`
3. define `blocked`
4. define `error`
### Acceptance Criteria
1. callback state logic is explicit and bounded
## Phase 2: Publish the Bounded Result
### Objective
Turn the callback-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