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browser/openspec/changes/move-scum-feature-ownership-to-plugin/proposal.md
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## Why
The five recent SCUM deliveries implemented most SCUM-specific domain services and React panels in `platform/` and `platform_web/`, leaving the SCUM plugin as a manifest and schema declaration. This makes the plugin non-portable, hard-codes SCUM into the platform host, and does not provide a real server-side adapter that can collect events or execute approved game operations.
## What Changes
- Move SCUM-specific feature ownership for configuration, local game-player intelligence, controlled player state changes, gifts, and map trajectories into the SCUM plugin package and its Companion runtime.
- Introduce a long-running, platform-authorized SCUM Companion adapter that receives only typed commands, emits only declared semantic events, and reports typed, idempotent results.
- Add one explicitly enabled, version-bound `vehicle.spawn` operation. It accepts only plugin-catalogued vehicle codes and can generate only the fixed `#spawnvehicle <vehicleCode>` template through a Companion-local, platform-authorized transport port; it is not a raw-RCON interface.
- **BREAKING** Replace platform-owned SCUM panels and SCUM-specific API/domain endpoints with a plugin-page module mounted by the generic platform plugin host.
- **BREAKING** Replace platform-owned SCUM projections and persistence with plugin-scoped local data accessed through generic platform isolation, audit, job, and storage primitives.
- Preserve the existing platform responsibilities for authorization, server/tenant isolation, review and approval, durable job delivery, audit records, retention enforcement, and generic page hosting.
- Treat current platform-side implementations as transitional control-plane behavior; do not claim an operation is available until the Companion has a verified executor or event producer.
## Capabilities
### New Capabilities
- `scum-plugin-feature-ownership`: Defines the required ownership boundary between the generic platform and the SCUM plugin, including plugin-page mounting and migration of the five SCUM feature areas.
- `scum-companion-runtime-adapter`: Defines the safe, typed Companion command/event adapter needed for real SCUM operation execution and semantic event collection.
### Modified Capabilities
- None. The prior SCUM requirements currently exist only in completed change artifacts, not in the repository's canonical `openspec/specs/` tree; this change establishes their replacement canonical contract.
## Impact
- Affected roots: `plugins/examples/scum-server-plugin/`, `plugins/sdk/`, `platform/`, and `platform_web/`.
- The SCUM Companion becomes the only place that translates approved typed operations into SCUM/RCON/legitimate-extension work and translates server signals into semantic events.
- Existing SCUM-specific platform APIs, models, services, and hard-coded frontend panels will require a staged migration with compatibility checks; unrelated platform and plugin behavior remains out of scope.