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openspec/changes/define-platform-foundation/specs/device-access-layer/spec.md

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+## ADDED Requirements
+
+### Requirement: Distinguish cloud-drive access from true remote mounts
+The platform SHALL explicitly distinguish between cloud-drive style access and true remote mount behavior.
+
+#### Scenario: Device access strategy is discussed
+- **WHEN** aiNAS plans device-native access on macOS or mobile
+- **THEN** the planning artifacts MUST state whether the capability is based on cloud-drive style client behavior, true remote mounts, or both
+
+### Requirement: Defer custom native agent work until justified
+The platform SHALL not require a custom device-native agent for the first backend and control-plane planning unless true remote mount orchestration is confirmed as a near-term requirement.
+
+#### Scenario: Delivery sequencing is chosen
+- **WHEN** implementation order is planned
+- **THEN** the design MUST allow heavy reuse of Nextcloud client references before requiring a custom native device daemon
+
+### Requirement: Keep future device agent possible
+The architecture SHALL preserve a clear boundary where a future aiNAS-owned device access layer can be introduced without rewriting the control plane.
+
+#### Scenario: Product later adds login-time mounts or stronger native behavior
+- **WHEN** aiNAS decides to add explicit mount orchestration or device-native workflows
+- **THEN** the design MUST place that behavior in a device access layer separate from the core control-plane domain