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+# Summary: Plan 02 - Gateway Infrastructure
+
+**Phase:** 01-gateway-routing
+**Plan:** 02
+**Status:** Completed
+**Date:** 2026-03-03
+
+---
+
+## Tasks Completed
+
+### Task 1: GatewayDbContext (Integrated into PlatformDbContext)
+- **Status:** Done
+- **Location:** `Fengling.Platform.Infrastructure/PlatformDbContext.cs`
+- **Details:** Gateway DbSets integrated into PlatformDbContext (not separate file)
+  - `DbSet<GwTenant> GwTenants`
+  - `DbSet<GwTenantRoute> GwTenantRoutes`
+  - `DbSet<GwServiceInstance> GwServiceInstances`
+- **Indexes configured:**
+  - GwTenant: TenantCode unique
+  - GwTenantRoute: TenantCode, ServiceName, ClusterId, composite (ServiceName, IsGlobal, Status)
+  - GwServiceInstance: composite unique (ClusterId, DestinationId), Health
+
+### Task 2: IRouteStore and RouteStore
+- **Status:** Done
+- **Files:**
+  - `Fengling.Platform.Infrastructure/IRouteStore.cs`
+  - `Fengling.Platform.Infrastructure/RouteStore.cs`
+- **Pattern:** Follows TenantStore pattern with generic constraint `where TContext : PlatformDbContext`
+- **Methods:** FindByIdAsync, FindByTenantCodeAsync, FindByClusterIdAsync, GetAllAsync, GetPagedAsync, GetCountAsync, CreateAsync, UpdateAsync, DeleteAsync
+- **Features:** Soft delete support, paged queries with filters
+
+### Task 3: IRouteManager and RouteManager
+- **Status:** Done
+- **Files:**
+  - `Fengling.Platform.Infrastructure/IRouteManager.cs`
+  - `Fengling.Platform.Infrastructure/RouteManager.cs`
+- **Pattern:** Delegates to IRouteStore (matches TenantManager pattern)
+- **Constructor:** `public RouteManager(IRouteStore store)`
+- **Methods:** FindByIdAsync, FindByTenantCodeAsync, GetAllAsync, CreateRouteAsync, UpdateRouteAsync, DeleteRouteAsync
+
+### Task 4: IInstanceStore and InstanceStore
+- **Status:** Done
+- **Files:**
+  - `Fengling.Platform.Infrastructure/IInstanceStore.cs`
+  - `Fengling.Platform.Infrastructure/InstanceStore.cs`
+- **Pattern:** Similar to RouteStore, generic constraint `where TContext : PlatformDbContext`
+- **Methods:** FindByIdAsync, FindByClusterIdAsync, FindByDestinationAsync, GetAllAsync, GetPagedAsync, GetCountAsync, CreateAsync, UpdateAsync, DeleteAsync
+- **Features:** ClusterId and DestinationId queries, health/status filtering
+
+---
+
+## Verification
+
+- [x] Build passes with 0 errors
+- [x] Store implementations follow TenantStore pattern
+- [x] Manager implementations delegate to Stores
+- [x] DbContext contains all required DbSets and indexes
+- [x] Soft delete implemented in all Store classes
+
+---
+
+## Key Decisions
+
+1. **DbContext Location:** Gateway entities integrated into PlatformDbContext rather than separate GatewayDbContext
+   - Rationale: Follows existing project conventions, simplifies DI
+
+2. **ID Type:** Using `string` IDs for Gateway entities (consistent with source fengling-gateway)
+   - GwTenant.Id, GwTenantRoute.Id, GwServiceInstance.Id are strings
+
+3. **Soft Delete:** All Store implementations support soft delete via `IsDeleted` property
+
+---
+
+## Artifacts Created
+
+| File | Purpose |
+|------|---------|
+| `PlatformDbContext.cs` | Contains GwTenants, GwTenantRoutes, GwServiceInstances DbSets |
+| `IRouteStore.cs` | Route CRUD interface |
+| `RouteStore.cs` | Route data access implementation |
+| `IRouteManager.cs` | Route business operations |
+| `RouteManager.cs` | Route business logic |
+| `IInstanceStore.cs` | Service instance CRUD interface |
+| `InstanceStore.cs` | Service instance data access implementation |
+
+---
+
+## Next Steps
+
+Plan 03 will add:
+- Extensions for IoC registration
+- `AddGatewayStores<TContext>()` extension method
+- DI configuration for Managers and Stores
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