---
phase: 10-branding-data-foundation
plan: "03"
subsystem: infra
tags: [di, dependency-injection, ioc-container, branding, graph-directory, wpf]

# Dependency graph
requires:
  - phase: 10-branding-data-foundation-01
    provides: "BrandingRepository, IBrandingService/BrandingService"
  - phase: 10-branding-data-foundation-02
    provides: "IGraphUserDirectoryService/GraphUserDirectoryService"

provides:
  - "BrandingRepository registered as Singleton in DI (branding.json path)"
  - "IBrandingService/BrandingService registered as Singleton in DI"
  - "IGraphUserDirectoryService/GraphUserDirectoryService registered as Transient in DI"
  - "Phase 10 services fully wired — resolvable at runtime"

affects:
  - phase-11-report-branding
  - phase-13-user-directory-viewmodel
  - phase-14-user-directory-ui

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Phase 10 DI block placed after SettingsRepository, before MsalClientFactory — grouped with other repository/infrastructure singletons"
    - "BrandingRepository: Singleton lifetime matching ProfileRepository/SettingsRepository (single file, shared SemaphoreSlim)"
    - "IBrandingService: Singleton lifetime — stateless after construction, depends on singleton BrandingRepository"
    - "IGraphUserDirectoryService: Transient lifetime — stateless, per-call, designed for multiple-tenant scenarios"

key-files:
  created: []
  modified:
    - SharepointToolbox/App.xaml.cs

key-decisions:
  - "No new using statements required — SharepointToolbox.Infrastructure.Persistence and SharepointToolbox.Services were already imported from prior phases"

patterns-established:
  - "Phase section comment pattern: each new phase block labeled with '// Phase N: Name' comment for orientation in RegisterServices"

requirements-completed:
  - BRAND-01
  - BRAND-03
  - BRAND-06

# Metrics
duration: 5min
completed: 2026-04-08
---

# Phase 10 Plan 03: DI Registration Summary

**BrandingRepository (Singleton), IBrandingService (Singleton), and IGraphUserDirectoryService (Transient) wired into App.xaml.cs — 224 tests pass, zero regressions**

## Performance

- **Duration:** ~5 min
- **Started:** 2026-04-08T10:34:43Z
- **Completed:** 2026-04-08T10:39:00Z
- **Tasks:** 1
- **Files modified:** 1

## Accomplishments

- All three Phase 10 services registered in the application's DI container with correct lifetimes
- Main project builds with zero warnings under `-warnaserror`
- Full test suite: 224 passed, 26 skipped (integration tests requiring live Graph), 0 failed

## Task Commits

Each task was committed atomically:

1. **Task 1: Register Phase 10 services in DI and run full test suite** - `7e8e228` (feat)

## Files Created/Modified

- `SharepointToolbox/App.xaml.cs` - Added Phase 10 DI block: BrandingRepository (Singleton, branding.json), IBrandingService/BrandingService (Singleton), IGraphUserDirectoryService/GraphUserDirectoryService (Transient)

## Decisions Made

None - followed plan as specified. The `using` directives for `SharepointToolbox.Infrastructure.Persistence` and `SharepointToolbox.Services` were already present, so no additional imports were needed.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

One flaky test failure (`CanExport_true_when_has_results`) occurred during the first full suite run. This test uses `WeakReferenceMessenger` with async ViewModel operations and is timing-sensitive. Re-running the specific test and then the full suite both passed. The failure was not caused by my DI changes (the test uses direct constructor injection with mocks — no DI container involved). The test passed on all subsequent runs.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- All Phase 10 services resolve at runtime without errors
- Phase 11 (report branding) can inject `IBrandingService` into export services and ViewModels
- Phase 13 (user directory ViewModel) can inject `IGraphUserDirectoryService`
- BrandingRepository will create `branding.json` on first write, in the existing AppData directory — no manual setup needed

---
*Phase: 10-branding-data-foundation*
*Completed: 2026-04-08*

## Self-Check: PASSED

- FOUND: SharepointToolbox/App.xaml.cs (with Phase 10 registrations)
- FOUND: .planning/phases/10-branding-data-foundation/10-03-SUMMARY.md
- FOUND commit: 7e8e228 (feat(10-03): register Phase 10 services in DI container)