# Air-Gap Epistemic Mode with Sealed Startup and Feed Snapshots

## Module
AirGap

## Status
IMPLEMENTED

## Description
Full epistemic completeness for air-gapped environments: sealed startup validation, feed snapshot repositories, signed mirror connectors, cryptographic binding of knowledge state to scan results, snapshot management, and sealed install enforcement.

## Implementation Details
- **Sealed startup**: `src/AirGap/StellaOps.AirGap.Controller/Services/AirGapStartupDiagnosticsHostedService.cs` -- validates sealed state at startup
- **Startup options**: `src/AirGap/StellaOps.AirGap.Controller/Options/AirGapStartupOptions.cs` -- sealed startup configuration
- **State management**: `src/AirGap/StellaOps.AirGap.Controller/Domain/AirGapState.cs`, `Services/AirGapStateService.cs`
- **State stores**: `src/AirGap/StellaOps.AirGap.Controller/Stores/IAirGapStateStore.cs`, `InMemoryAirGapStateStore.cs`
- **Feed snapshots**: `src/AirGap/__Libraries/StellaOps.AirGap.Bundle/` -- snapshot management in bundle library
- **Offline verification**: `src/AirGap/StellaOps.AirGap.Importer/Policy/OfflineVerificationPolicy.cs`, `OfflineVerificationPolicyLoader.cs`
- **Source**: Feature matrix scan

## E2E Test Plan
- [ ] Verify sealed startup validation prevents operation with incomplete knowledge state
- [ ] Test feed snapshot loading and cryptographic binding
- [ ] Verify state transitions in air-gap controller
- [ ] Test offline verification policy enforcement