---
phase: "03-"
plan: 04
subsystem: Gateway
tags: [gateway, di, registration, extensions]
dependency_graph:
  requires: [IClusterStore (from plan 03)]
  provides: [Updated DI registration]
  affects: [Extensions, GatewayExtensions]
tech_stack:
  added: []
  patterns:
    - ASP.NET Core DI registration
    - Generic DbContext constraint
key_files:
  created: []
  modified:
    - Fengling.Platform.Infrastructure/Extensions.cs
    - Fengling.Platform.Infrastructure/GatewayExtensions.cs
  deleted: []
decisions:
  - "IClusterStore registered as scoped service"
  - "Both AddPlatformCore and AddGatewayCore register IClusterStore"
metrics:
  duration: "included in plan 03"
  completed_date: "2026-03-03"
requirements_completed: [GATEWAY-RESTRUCTURE-07]
---

# Phase 03- Plan 04: Gateway DI Update Summary

## One-Liner

Updated DI registration in Extensions.cs and GatewayExtensions.cs to register IClusterStore/ClusterStore instead of deprecated IInstanceStore.

## Completed Tasks

| Task | Name | Status | Commit |
|------|------|--------|--------|
| 1 | Update Extensions.cs | ✅ Complete | a655813 |
| 2 | Update GatewayExtensions.cs | ✅ Complete | a655813 |

**Note:** Tasks were completed as part of Plan 03's deviation fix (Rule 2 - Auto-add missing functionality).

## Verification

- [x] Extensions.cs registers IClusterStore in AddPlatformCore
- [x] GatewayExtensions.cs registers IClusterStore in AddGatewayCore
- [x] IInstanceStore references removed
- [x] Build passes with 0 errors

## Deviations from Plan

**Work completed as part of Plan 03 deviation fix:**
- The Wave 2 agent proactively updated DI registration files during infrastructure update
- This was necessary to fix build errors from deleted IInstanceStore references
- No additional commits needed - changes included in Plan 03 commit `a655813`

## Auth Gates

None.

## Notes

The DI registration update was logically part of the infrastructure update since:
1. IClusterStore/ClusterStore were created in Plan 03
2. Extensions must reference the new store immediately to compile
3. Splitting commits would have created a broken intermediate state

---

*Phase: 03-*
*Completed: 2026-03-03*