---
phase: 01-foundation
plan: 01
subsystem: infra
tags: [wpf, dotnet10, msal, pnp-framework, serilog, xunit, generic-host, csharp]

# Dependency graph
requires: []
provides:
  - WPF .NET 10 solution scaffold (SharepointToolbox.slnx)
  - Generic Host entry point with [STAThread] Main and Serilog rolling file sink
  - All NuGet packages pre-wired (CommunityToolkit.Mvvm, MSAL, PnP.Framework, Serilog)
  - xUnit test project with 7 stub test files (0 failed, 7 skipped)
affects:
  - 01-02 (folder structure builds on this scaffold)
  - 01-03 (ProfileService/SettingsService tests stubbed here)
  - 01-04 (MsalClientFactory/SessionManager tests stubbed here)
  - 01-05 (TranslationSource/LoggingIntegration tests stubbed here)
  - 01-06 (FeatureViewModelBase tests stubbed here)

# Tech tracking
tech-stack:
  added:
    - CommunityToolkit.Mvvm 8.4.2
    - Microsoft.Extensions.Hosting 10.0.0
    - Microsoft.Identity.Client 4.83.3
    - Microsoft.Identity.Client.Extensions.Msal 4.83.3
    - Microsoft.Identity.Client.Broker 4.82.1
    - PnP.Framework 1.18.0
    - Serilog 4.3.1
    - Serilog.Sinks.File 7.0.0
    - Serilog.Extensions.Hosting 10.0.0
    - Moq 4.20.72 (test project)
    - xunit 2.9.3 (test project)
  patterns:
    - Generic Host entry point via static [STAThread] Main (not Application.Run override)
    - App.xaml demoted from ApplicationDefinition to Page (enables custom Main)
    - PublishTrimmed=false enforced to support PnP.Framework + MSAL reflection usage
    - net10.0-windows + UseWPF=true in both main and test projects for compatibility

key-files:
  created:
    - SharepointToolbox.slnx
    - SharepointToolbox/SharepointToolbox.csproj
    - SharepointToolbox/App.xaml
    - SharepointToolbox/App.xaml.cs
    - SharepointToolbox/MainWindow.xaml
    - SharepointToolbox/MainWindow.xaml.cs
    - SharepointToolbox.Tests/SharepointToolbox.Tests.csproj
    - SharepointToolbox.Tests/Services/ProfileServiceTests.cs
    - SharepointToolbox.Tests/Services/SettingsServiceTests.cs
    - SharepointToolbox.Tests/Auth/MsalClientFactoryTests.cs
    - SharepointToolbox.Tests/Auth/SessionManagerTests.cs
    - SharepointToolbox.Tests/ViewModels/FeatureViewModelBaseTests.cs
    - SharepointToolbox.Tests/Localization/TranslationSourceTests.cs
    - SharepointToolbox.Tests/Integration/LoggingIntegrationTests.cs
  modified: []

key-decisions:
  - "Upgraded MSAL from 4.83.1 to 4.83.3 — Extensions.Msal 4.83.3 requires MSAL >= 4.83.3; minor patch bump with no behavioral difference"
  - "Test project targets net10.0-windows with UseWPF=true — required to reference main WPF project; plain net10.0 is framework-incompatible"
  - "Solution uses .slnx format (new .NET 10 XML solution format) — dotnet new sln creates .slnx in .NET 10 SDK, fully supported"

patterns-established:
  - "Generic Host + [STAThread] Main: App.xaml.cs owns static Main, App.xaml has no StartupUri, App.xaml is Page not ApplicationDefinition"
  - "Stub test pattern: [Fact(Skip = reason)] with plan reference — ensures test suite passes from day one while tracking future implementation"

requirements-completed:
  - FOUND-01

# Metrics
duration: 4min
completed: 2026-04-02
---

# Phase 1 Plan 01: Solution Scaffold Summary

**WPF .NET 10 solution with Generic Host entry point, all NuGet packages (MSAL 4.83.3, PnP.Framework 1.18.0, Serilog 4.3.1), and xUnit test project with 7 stub tests (0 failures)**

## Performance

- **Duration:** 4 min
- **Started:** 2026-04-02T09:58:26Z
- **Completed:** 2026-04-02T10:02:35Z
- **Tasks:** 2
- **Files modified:** 14

## Accomplishments

- Solution scaffold compiles with 0 errors and 0 warnings on dotnet build
- Generic Host entry point correctly wired with [STAThread] Main, App.xaml demoted from ApplicationDefinition to Page
- All 9 NuGet packages added with compatible versions; PublishTrimmed=false enforced
- xUnit test project references main project; dotnet test shows 7 skipped, 0 failed

## Task Commits

Each task was committed atomically:

1. **Task 1: Create solution and WPF project with all NuGet packages** - `f469804` (feat)
2. **Task 2: Create xUnit test project with stub test files** - `eac34e3` (feat)

**Plan metadata:** (docs commit follows)

## Files Created/Modified

- `SharepointToolbox.slnx` - Solution file with both projects
- `SharepointToolbox/SharepointToolbox.csproj` - WPF .NET 10 with all packages, PublishTrimmed=false, StartupObject
- `SharepointToolbox/App.xaml` - StartupUri removed, App.xaml as Page not ApplicationDefinition
- `SharepointToolbox/App.xaml.cs` - [STAThread] Main with Host.CreateDefaultBuilder + Serilog rolling file sink
- `SharepointToolbox/MainWindow.xaml` + `MainWindow.xaml.cs` - Default WPF template (replaced in plan 01-06)
- `SharepointToolbox.Tests/SharepointToolbox.Tests.csproj` - xUnit + Moq, net10.0-windows, references main project
- 7 stub test files across Services/, Auth/, ViewModels/, Localization/, Integration/

## Decisions Made

- Upgraded MSAL from 4.83.1 to 4.83.3 — Extensions.Msal 4.83.3 pulls MSAL >= 4.83.3 as a transitive dependency; pinning 4.83.1 caused NU1605 downgrade error. Minor patch bump, no behavioral change.
- Test project targets net10.0-windows with UseWPF=true — framework incompatibility prevented `dotnet add reference` with net10.0; WPF test host is required anyway for any UI-layer testing.
- Solution file is .slnx (new .NET 10 XML format) — dotnet new sln in .NET 10 SDK creates .slnx by default; fully functional with dotnet build/test.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] MSAL version bumped from 4.83.1 to 4.83.3**
- **Found during:** Task 1 (NuGet package installation)
- **Issue:** `Microsoft.Identity.Client.Extensions.Msal 4.83.3` requires `Microsoft.Identity.Client >= 4.83.3`; plan specified 4.83.1 causing NU1605 downgrade error and failed restore
- **Fix:** Updated MSAL pin to 4.83.3 to satisfy transitive dependency constraint
- **Files modified:** SharepointToolbox/SharepointToolbox.csproj
- **Verification:** `dotnet restore` succeeded; build 0 errors
- **Committed in:** f469804 (Task 1 commit)

**2. [Rule 3 - Blocking] Test project changed to net10.0-windows + UseWPF=true**
- **Found during:** Task 2 (adding project reference to test project)
- **Issue:** `dotnet add reference` rejected with "incompatible targeted frameworks" — net10.0 test cannot reference net10.0-windows WPF project
- **Fix:** Updated test project TargetFramework to net10.0-windows and added UseWPF=true
- **Files modified:** SharepointToolbox.Tests/SharepointToolbox.Tests.csproj
- **Verification:** `dotnet test` succeeded; 7 skipped, 0 failed
- **Committed in:** eac34e3 (Task 2 commit)

---

**Total deviations:** 2 auto-fixed (1 bug — version conflict, 1 blocking — framework incompatibility)
**Impact on plan:** Both fixes required for the build to succeed. No scope creep. MSAL functionality identical at 4.83.3.

## Issues Encountered

- dotnet new wpf rejects `-f net10.0-windows` as framework flag (only accepts short TFM like `net10.0`) but the generated csproj correctly sets `net10.0-windows`. Template limitation, not a runtime issue.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Solution scaffold ready for plan 01-02 (folder structure and namespace layout)
- All packages pre-installed — subsequent plans add code, not packages
- Test infrastructure wired — stub files will be implemented in their respective plans (01-03 through 01-06)

---
*Phase: 01-foundation*
*Completed: 2026-04-02*