Shogi/.github/upgrades/scenarios/new-dotnet-version_a1d9f5/plan.md

.NET 10.0 Upgrade Plan

Table of Contents

• Executive Summary
• Migration Strategy
• Detailed Dependency Analysis
• Project-by-Project Migration Plans
• Package Update Reference
• Breaking Changes Catalog
• Testing & Validation Strategy
• Risk Management
• Complexity & Effort Assessment
• Source Control Strategy
• Success Criteria

---

Executive Summary

Scenario Description

Upgrade Shogi solution from .NET 8.0 to .NET 10.0 (Long Term Support). The solution consists of 5 projects, with 4 .NET projects already targeting net10.0 and 1 SQL database project remaining on .NET Framework 4.7.2.

Scope

Projects in Scope:

• BoardRules\BoardRules.csproj - Class library, already on net10.0 ✅
• Shogi\Shogi.csproj - ASP.NET Core web application, already on net10.0 ✅
• Tests\AcceptanceTests\Shogi.AcceptanceTests.csproj - Test project, already on net10.0 ✅
• Tests\UnitTests\UnitTests.csproj - Test project, already on net10.0 ✅
• Shogi.Database\Shogi.Database.sqlproj - SQL database project, remains on net472 (as expected)

Current State:

• 4 of 5 .NET projects already targeting net10.0
• All 14 NuGet packages already compatible with .NET 10.0
• No security vulnerabilities detected
• Total codebase: 5,753 lines of code across 64 files

Target State:

• Confirm all .NET projects are on net10.0
• Verify all packages are compatible
• Validate solution builds and all tests pass

Selected Strategy

All-At-Once Strategy - All projects are already upgraded simultaneously.

Rationale:

• Small solution - Only 5 projects
• Already migrated - 4 projects already on net10.0
• Simple dependency structure - Clear hierarchy with no circular dependencies
• All packages compatible - All 14 NuGet packages support .NET 10.0
• Zero risk - No breaking changes, no security issues
• Verification focus - Primary task is to validate current state, not perform migration

Complexity Assessment

Discovered Metrics:

• Project count: 5 (4 .NET projects + 1 SQL database project)
• Dependency depth: 1 (test projects depend on main Shogi project)
• High-risk projects: 0
• Security vulnerabilities: 0
• Package updates required: 0 (all already compatible)
• Lines of code: 5,753
• API compatibility issues: 0

Classification: Simple - Verification scenario

Critical Issues: None

Recommended Approach

Phase 1: Verification - Confirm projects are on net10.0, packages are compatible Phase 2: Build & Test - Ensure solution builds and all tests pass Phase 3: Documentation - Update any remaining documentation references

This is primarily a validation exercise rather than an active migration, as the solution appears to have already been upgraded to .NET 10.0.

Iteration Strategy

Fast Verification Approach (2-3 iterations):

• One iteration for all project details (since they're already upgraded)
• One iteration for validation and success criteria

---

Migration Strategy

Approach Selection

Selected: All-At-Once Strategy (Verification Mode)

This scenario is unique - it's not a traditional migration but a verification of an already-completed upgrade. All .NET projects already target net10.0.

Strategy Rationale

Why All-At-Once (Already Complete):

1. Small Solution - Only 5 projects total (4 .NET projects)
2. Already Migrated - All .NET projects already on net10.0
3. All Packages Compatible - All 14 NuGet packages already support .NET 10.0
4. No Breaking Changes - Zero API compatibility issues detected
5. Simple Dependencies - Clear hierarchy, no circular dependencies
6. Low Risk - No security vulnerabilities, no code changes required

All-At-Once Strategy Considerations

Simultaneity: Not applicable - upgrade already performed. Focus is on validation.

Atomic Operation: The original upgrade appears to have been completed atomically. Our task is to verify this state.

No Intermediate States: Already achieved - all projects are on target framework.

Dependency-Based Ordering

While not needed for migration, validation will follow dependency order:

Validation Order:

1. Standalone projects first: BoardRules (no dependencies)
2. Main application: Shogi.csproj (depends on nothing within solution)
3. Test projects last: AcceptanceTests, UnitTests (depend on Shogi.csproj)

This ensures if issues exist, they're discovered at the lowest dependency level first.

Parallel vs Sequential Execution

Validation Approach: Sequential validation following dependency order ensures clear error isolation. However, since all projects are already upgraded, parallel validation would also be safe.

Recommended: Sequential for clarity, parallel acceptable for speed.

Phase Definitions

Phase 1: Project File Verification

• Confirm all .NET projects have <TargetFramework>net10.0</TargetFramework>
• Verify Shogi.Database.sqlproj correctly remains on net472
• Validate package references are compatible versions

Phase 2: Build Validation

• Restore NuGet packages
• Build entire solution
• Confirm zero errors, zero warnings

Phase 3: Test Validation

• Run acceptance tests
• Run unit tests
• Confirm all tests pass

Phase 4: Documentation

• Update any deployment documentation
• Confirm README reflects .NET 10.0
• Document verification results

---

Detailed Dependency Analysis

Dependency Graph Summary

The solution has a simple, clean dependency structure:

BoardRules.csproj (standalone, no dependencies)
    ↓
Shogi.csproj (main ASP.NET Core application)
    ↓
├── Shogi.AcceptanceTests.csproj (acceptance tests)
└── UnitTests.csproj (unit tests)

Shogi.Database.sqlproj (standalone SQL database project)

Dependency Characteristics:

• Depth: 1 level (test projects depend on main project)
• Circular dependencies: None
• Standalone projects: 2 (BoardRules, Shogi.Database)
• Leaf nodes: 2 (test projects)
• Root node: 1 (Shogi.csproj)

Project Groupings by Migration Phase

Since all .NET projects are already on net10.0, grouping is for validation purposes only:

Group 1: Standalone Libraries

• BoardRules\BoardRules.csproj (already net10.0)
• Shogi.Database\Shogi.Database.sqlproj (remains net472 - SQL database project)

Group 2: Main Application

• Shogi\Shogi.csproj (already net10.0)

Group 3: Test Projects

• Tests\AcceptanceTests\Shogi.AcceptanceTests.csproj (already net10.0)
• Tests\UnitTests\UnitTests.csproj (already net10.0)

Critical Path Identification

No critical path - All projects are already on target framework. The validation sequence is:

1. Verify standalone libraries (BoardRules)
2. Verify main application (Shogi)
3. Verify test projects build and pass

Circular Dependency Analysis

No circular dependencies detected - Clean dependency tree.

---

Project-by-Project Migration Plans

Project: BoardRules\BoardRules.csproj

Current State:

• Target Framework: net10.0 ✅
• SDK-Style: True
• Project Type: Class Library
• Dependencies: 0 project dependencies, 0 NuGet packages
• Dependants: 0 (standalone library)
• Lines of Code: 120
• Risk Level: None

Target State:

• Target Framework: net10.0 (already achieved)
• Package Count: 0 (unchanged)

Migration Steps: ✅ Already Complete

This project is already on net10.0. No migration actions required.

Validation Steps:

1. ✅ Verify project file contains <TargetFramework>net10.0</TargetFramework>
2. ✅ Build project independently
3. ✅ Confirm zero build errors
4. ✅ Confirm zero build warnings

Expected Breaking Changes: None - project already on target framework

Code Modifications: None required

Testing Strategy:

• Build verification only (no test project exists for BoardRules)
• Confirm no compilation errors
• Verify as part of solution-wide build

Validation Checklist:

• Project builds successfully
• No build warnings
• No package dependency conflicts
• Compatible with dependent projects (none currently)

---

Project: Shogi\Shogi.csproj

Current State:

• Target Framework: net10.0 ✅
• SDK-Style: True
• Project Type: ASP.NET Core Web Application
• Dependencies: 0 project dependencies (within solution)
• Dependants: 2 (Shogi.AcceptanceTests, UnitTests)
• NuGet Packages: 12 packages, all compatible with net10.0
• Lines of Code: 4,232
• Risk Level: None

Target State:

• Target Framework: net10.0 (already achieved)
• Package Count: 12 (all already compatible)

Migration Steps: ✅ Already Complete

This project is already on net10.0 with all packages at compatible versions.

Package Updates: None required - all packages already compatible

Package	Current Version	Status
Dapper	2.1.66	✅ Compatible
FluentValidation	12.1.1	✅ Compatible
Microsoft.AspNetCore.Identity.EntityFrameworkCore	10.0.1	✅ Compatible
Microsoft.AspNetCore.SignalR.Client	10.0.1	✅ Compatible
Microsoft.EntityFrameworkCore.Design	10.0.1	✅ Compatible
Microsoft.EntityFrameworkCore.InMemory	10.0.1	✅ Compatible
Microsoft.EntityFrameworkCore.SqlServer	10.0.1	✅ Compatible
Swashbuckle.AspNetCore	10.1.0	✅ Compatible
System.Data.SqlClient	4.9.0	✅ Compatible

Expected Breaking Changes: None - project already on target framework, packages already compatible

Code Modifications: None required

Configuration Updates: None required - ASP.NET Core configuration already compatible

Testing Strategy:

• Build project successfully
• Execute acceptance tests (see Shogi.AcceptanceTests project)
• Execute unit tests (see UnitTests project)
• Verify application startup (if applicable)

Validation Checklist:

• Project builds successfully
• No build warnings
• All package dependencies restore successfully
• Entity Framework migrations compatible (if any)
• Acceptance tests pass
• Unit tests pass
• SignalR functionality works (if used)
• Identity/authentication works (if used)

---

Project: Shogi.Database\Shogi.Database.sqlproj

Current State:

• Target Framework: net472
• SDK-Style: False
• Project Type: SQL Database Project (Classic)
• Dependencies: 0 project dependencies
• Dependants: 0
• Lines of Code: 0 (SQL project)
• Risk Level: None

Target State:

• Target Framework: net472 (unchanged - SQL database projects remain on .NET Framework)
• No migration required

Migration Steps: ⚠️ No Migration Required

SQL Database projects (.sqlproj) are build-time tools that generate database schema scripts. They typically remain on .NET Framework and do not need to be upgraded to .NET Core/.NET 10.0.

Rationale for Not Upgrading:

• SQL database projects are MSBuild-based schema definition tools
• They generate T-SQL scripts, not runtime executables
• .NET Framework 4.7.2 is appropriate for these projects
• No compatibility issues with the rest of the solution being on .NET 10.0

Validation Steps:

1. ✅ Confirm project remains on net472
2. ✅ Verify project builds successfully
3. ✅ Confirm database scripts generate correctly

Expected Breaking Changes: None

Code Modifications: None

Testing Strategy:

• Build verification only
• Confirm SQL scripts generate without errors
• Verify compatibility with SQL Server deployment targets

Validation Checklist:

• Project builds successfully on net472
• No build warnings
• Database schema scripts generate correctly
• No impact on .NET 10.0 projects in solution

---

Project: Tests\AcceptanceTests\Shogi.AcceptanceTests.csproj

Current State:

• Target Framework: net10.0 ✅
• SDK-Style: True
• Project Type: xUnit Test Project (.NET Core)
• Dependencies: 1 project (Shogi.csproj)
• Dependants: 0
• NuGet Packages: 6 packages, all compatible with net10.0
• Lines of Code: 443
• Risk Level: None

Target State:

• Target Framework: net10.0 (already achieved)
• Package Count: 6 (all already compatible)

Migration Steps: ✅ Already Complete

This project is already on net10.0 with all test packages at compatible versions.

Package Updates: None required - all packages already compatible

Package	Current Version	Status
coverlet.collector	6.0.4	✅ Compatible
Microsoft.AspNetCore.Mvc.Testing	10.0.1	✅ Compatible
Microsoft.EntityFrameworkCore.InMemory	10.0.1	✅ Compatible
Microsoft.NET.Test.Sdk	18.0.1	✅ Compatible
xunit	2.9.3	✅ Compatible
xunit.runner.visualstudio	3.1.5	✅ Compatible

Expected Breaking Changes: None - project already on target framework

Code Modifications: None required

Testing Strategy:

• Build test project successfully
• Execute all acceptance tests
• Verify test discovery works correctly
• Confirm code coverage collection works (coverlet.collector)
• Validate ASP.NET Core test host compatibility (Microsoft.AspNetCore.Mvc.Testing)

Validation Checklist:

• Test project builds successfully
• No build warnings
• All tests are discovered
• All tests execute
• All tests pass
• Code coverage reporting works
• In-memory database tests function correctly

---

Project: Tests\UnitTests\UnitTests.csproj

Current State:

• Target Framework: net10.0 ✅
• SDK-Style: True
• Project Type: xUnit Test Project (.NET Core)
• Dependencies: 1 project (Shogi.csproj)
• Dependants: 0
• NuGet Packages: 4 packages, all compatible with net10.0
• Lines of Code: 958
• Risk Level: None

Target State:

• Target Framework: net10.0 (already achieved)
• Package Count: 4 (all already compatible)

Migration Steps: ✅ Already Complete

This project is already on net10.0 with all test packages at compatible versions.

Package Updates: None required - all packages already compatible

Package	Current Version	Status
coverlet.collector	6.0.4	✅ Compatible
Microsoft.NET.Test.Sdk	18.0.1	✅ Compatible
xunit	2.9.3	✅ Compatible
xunit.runner.visualstudio	3.1.5	✅ Compatible

Expected Breaking Changes: None - project already on target framework

Code Modifications: None required

Testing Strategy:

• Build test project successfully
• Execute all unit tests
• Verify test discovery works correctly
• Confirm code coverage collection works (coverlet.collector)

Validation Checklist:

• Test project builds successfully
• No build warnings
• All tests are discovered
• All tests execute
• All tests pass
• Code coverage reporting works

---

Package Update Reference

Summary

All packages are already compatible with .NET 10.0. No package updates are required as part of this verification exercise.

Complete Package Matrix

Package	Current Version	Target Version	Projects	Update Reason
coverlet.collector	6.0.4	6.0.4 (no change)	AcceptanceTests, UnitTests	✅ Already compatible
Dapper	2.1.66	2.1.66 (no change)	Shogi	✅ Already compatible
FluentValidation	12.1.1	12.1.1 (no change)	Shogi	✅ Already compatible
Microsoft.AspNetCore.Identity.EntityFrameworkCore	10.0.1	10.0.1 (no change)	Shogi	✅ Already compatible
Microsoft.AspNetCore.Mvc.Testing	10.0.1	10.0.1 (no change)	AcceptanceTests	✅ Already compatible
Microsoft.AspNetCore.SignalR.Client	10.0.1	10.0.1 (no change)	Shogi	✅ Already compatible
Microsoft.EntityFrameworkCore.Design	10.0.1	10.0.1 (no change)	Shogi	✅ Already compatible
Microsoft.EntityFrameworkCore.InMemory	10.0.1	10.0.1 (no change)	AcceptanceTests, Shogi	✅ Already compatible
Microsoft.EntityFrameworkCore.SqlServer	10.0.1	10.0.1 (no change)	Shogi	✅ Already compatible
Microsoft.NET.Test.Sdk	18.0.1	18.0.1 (no change)	AcceptanceTests, UnitTests	✅ Already compatible
Swashbuckle.AspNetCore	10.1.0	10.1.0 (no change)	Shogi	✅ Already compatible
System.Data.SqlClient	4.9.0	4.9.0 (no change)	Shogi	✅ Already compatible
xunit	2.9.3	2.9.3 (no change)	AcceptanceTests, UnitTests	✅ Already compatible
xunit.runner.visualstudio	3.1.5	3.1.5 (no change)	AcceptanceTests, UnitTests	✅ Already compatible

Package Category Analysis

ASP.NET Core Packages (already at .NET 10.0 versions):

• Microsoft.AspNetCore.Identity.EntityFrameworkCore: 10.0.1
• Microsoft.AspNetCore.Mvc.Testing: 10.0.1
• Microsoft.AspNetCore.SignalR.Client: 10.0.1

Entity Framework Core Packages (already at .NET 10.0 versions):

• Microsoft.EntityFrameworkCore.Design: 10.0.1
• Microsoft.EntityFrameworkCore.InMemory: 10.0.1
• Microsoft.EntityFrameworkCore.SqlServer: 10.0.1

Testing Packages (already at compatible versions):

• Microsoft.NET.Test.Sdk: 18.0.1
• xunit: 2.9.3
• xunit.runner.visualstudio: 3.1.5
• coverlet.collector: 6.0.4

Utility Packages (already at compatible versions):

• Dapper: 2.1.66
• FluentValidation: 12.1.1
• Swashbuckle.AspNetCore: 10.1.0
• System.Data.SqlClient: 4.9.0

Security Assessment

No security vulnerabilities detected in any packages. All packages are at secure, compatible versions for .NET 10.0.

---

Breaking Changes Catalog

Summary

No breaking changes detected. All projects are already on the target framework (net10.0) and all packages are at compatible versions.

Framework Breaking Changes

From .NET 8.0 to .NET 10.0: Not applicable - projects already on net10.0.

If projects had been migrated from .NET 8.0 to .NET 10.0, the following categories would typically be reviewed:

• ASP.NET Core API changes (already handled)
• Entity Framework Core API changes (already handled)
• BCL (Base Class Library) changes (already handled)
• Runtime behavior changes (already handled)

Package-Specific Breaking Changes

No package breaking changes - all packages are already at .NET 10.0-compatible versions.

Configuration Changes

No configuration changes required - ASP.NET Core configuration is already compatible with .NET 10.0.

Known Issues

None identified during assessment. All API compatibility checks passed.

Areas Requiring Special Attention

Since this is a verification scenario, the following areas should be validated to ensure no issues were missed:

1. Entity Framework Migrations: Verify all EF migrations are compatible and functional
2. SignalR Implementation: Confirm SignalR hubs and clients work correctly
3. Identity/Authentication: Validate authentication and authorization flows
4. Dependency Injection: Ensure all service registrations are correct
5. Middleware Pipeline: Verify middleware order and functionality

Breaking Changes by Project

BoardRules.csproj: None
Shogi.csproj: None
Shogi.Database.sqlproj: None (not migrating)
Shogi.AcceptanceTests.csproj: None
UnitTests.csproj: None

---

Testing & Validation Strategy

Overview

Testing strategy focuses on verification rather than migration validation, since all projects are already on the target framework.

Multi-Level Testing

Phase 1: Project-Level Verification

For Each Project:

1. BoardRules.csproj

   • Project file verification: <TargetFramework>net10.0</TargetFramework> exists
   • Builds without errors
   • Builds without warnings
   • No package dependency conflicts

2. Shogi.csproj

   • Project file verification: <TargetFramework>net10.0</TargetFramework> exists
   • All 12 packages restore successfully
   • Builds without errors
   • Builds without warnings
   • Entity Framework migrations are intact
   • Configuration files are valid

3. Shogi.Database.sqlproj

   • Project file verification: remains on net472
   • Builds without errors
   • Database scripts generate successfully

4. Shogi.AcceptanceTests.csproj

   • Project file verification: <TargetFramework>net10.0</TargetFramework> exists
   • All 6 test packages restore successfully
   • Builds without errors
   • All tests are discovered
   • Tests can execute (actual pass/fail checked in Phase 3)

5. UnitTests.csproj

   • Project file verification: <TargetFramework>net10.0</TargetFramework> exists
   • All 4 test packages restore successfully
   • Builds without errors
   • All tests are discovered
   • Tests can execute (actual pass/fail checked in Phase 3)

Phase 2: Solution-Level Verification

Complete Solution Build:

• dotnet restore succeeds for entire solution
• dotnet build succeeds for entire solution
• Zero compilation errors across all projects
• Zero compilation warnings across all projects
• All project references resolve correctly
• All package dependencies resolve correctly

Phase 3: Functional Testing

Acceptance Tests:

• All acceptance tests execute
• All acceptance tests pass
• ASP.NET Core test host initializes correctly
• In-memory database tests function correctly
• Integration scenarios work as expected

Unit Tests:

• All unit tests execute
• All unit tests pass
• Code coverage collection works (if enabled)
• Test isolation is maintained

Application Verification (if applicable):

• Application starts successfully
• API endpoints are accessible
• Database connectivity works
• SignalR functionality operates correctly (if used)
• Identity/authentication flows work (if used)
• Swagger/OpenAPI documentation generates correctly

Phase 4: Deployment Verification (if applicable)

• Application can be published (dotnet publish)
• Published output is complete
• Published application runs in deployment environment
• Configuration transformations work correctly

Test Execution Order

1. Standalone projects first: BoardRules, Shogi.Database
2. Main application: Shogi
3. Test projects: AcceptanceTests, UnitTests

This order follows dependency hierarchy to catch issues early.

Success Criteria for Testing

Build Success:

• All 5 projects build without errors
• Zero build warnings
• All package references restore successfully

Test Success:

• All acceptance tests pass (100%)
• All unit tests pass (100%)
• Code coverage maintains or improves previous levels

Functional Success:

• Application starts and runs correctly
• All major features function as expected
• No runtime exceptions related to framework version

Testing Tools

• Build: dotnet build (or Visual Studio)
• Test Execution: dotnet test (or Visual Studio Test Explorer)
• Code Coverage: coverlet.collector (already configured)
• Package Management: dotnet restore or NuGet Package Manager

Regression Testing

Since projects are already upgraded, regression testing ensures no functionality was lost:

• Review test results history (if available)
• Compare current test pass rate with previous runs
• Validate critical business scenarios
• Check performance benchmarks (if established)

---

Risk Management

High-Level Risk Assessment

Overall Risk Level: Very Low

All .NET projects are already on the target framework (net10.0), all packages are compatible, and no security vulnerabilities were detected. This is a verification exercise, not an active migration.

Risk Analysis

Project	Risk Level	Description	Mitigation
BoardRules.csproj	✅ None	Already on net10.0, standalone library, 120 LOC	Verify builds without errors
Shogi.csproj	✅ None	Already on net10.0, all packages compatible, 4,232 LOC	Build and run acceptance/unit tests
Shogi.Database.sqlproj	✅ None	Remains on net472 as expected for SQL database projects	No action required
Shogi.AcceptanceTests.csproj	✅ None	Already on net10.0, test project, 443 LOC	Execute tests to confirm functionality
UnitTests.csproj	✅ None	Already on net10.0, test project, 958 LOC	Execute tests to confirm functionality

Security Vulnerabilities

No security vulnerabilities detected across all NuGet packages. All packages are at compatible, secure versions for .NET 10.0.

Contingency Plans

Since this is a verification scenario with minimal risk, contingency planning is straightforward:

If build fails:

• Review build errors for any environmental issues (SDK version, tooling)
• Confirm .NET 10.0 SDK is properly installed
• Check for missing NuGet package sources

If tests fail:

• Isolate failing tests to determine if related to framework version
• Review test execution environment
• Check for test infrastructure compatibility with .NET 10.0

If package compatibility issues arise:

• Re-assess package versions (assessment shows all compatible)
• Check for package source configuration issues
• Verify NuGet cache is not corrupted

Rollback Plan

Not applicable - Since projects are already on net10.0, there is no migration to roll back. If issues are discovered, they would be addressed in-place rather than through rollback.

---

Complexity & Effort Assessment

Per-Project Complexity

Project	Complexity	Dependencies	Risk	LOC	Notes
BoardRules.csproj	Low	0	None	120	Standalone library, already upgraded
Shogi.csproj	Low	0	None	4,232	Main app, already upgraded, all packages compatible
Shogi.Database.sqlproj	Low	0	None	0	SQL database project, no migration needed
Shogi.AcceptanceTests.csproj	Low	1	None	443	Test project, already upgraded
UnitTests.csproj	Low	1	None	958	Test project, already upgraded

Overall Complexity: Low - This is a verification scenario, not an active migration.

Phase Complexity Assessment

Phase 1: Project File Verification

• Complexity: Low
• Effort: Minimal - automated verification of TargetFramework properties
• Dependencies: None

Phase 2: Build Validation

• Complexity: Low
• Effort: Minimal - standard build process
• Dependencies: Phase 1 complete

Phase 3: Test Validation

• Complexity: Low
• Effort: Minimal - execute existing test suites
• Dependencies: Phase 2 complete (solution must build)

Phase 4: Documentation

• Complexity: Low
• Effort: Minimal - update deployment docs if needed
• Dependencies: Phase 3 complete (tests must pass)

Resource Requirements

Skill Levels Required:

• Basic .NET knowledge - Sufficient for verification activities
• Build/test execution - Standard CI/CD skills
• No advanced migration expertise needed - Projects already upgraded

Parallel Capacity:

• Not applicable - Verification is lightweight and can be done sequentially
• All validation activities can be performed by a single resource

Total Effort Estimate

Relative Complexity: Low

Effort Distribution:

• Project file verification: Low
• Build validation: Low
• Test validation: Low
• Documentation updates: Low

Note: No real-time estimates provided. This is a verification exercise with minimal actual work required. The primary task is confirming that the existing state is correct and functional.

---

Source Control Strategy

Overview

Since this is a verification exercise rather than an active migration, source control strategy focuses on documenting the current state and ensuring any validation findings are properly tracked.

Branching Strategy

Current Branch: ssr (as requested by user)

Approach: Work directly on the ssr branch, as no destructive changes are anticipated.

Rationale:

• Projects are already upgraded to net10.0
• Verification activities do not modify code
• Any documentation updates are additive, not breaking
• Low risk of needing to revert changes

Alternative Approach (if preferred):

• Create a verification branch from ssr
• Perform all validation activities
• Merge back to ssr after successful verification
• This provides isolation but adds overhead for minimal benefit

Commit Strategy

Approach: Single commit after successful verification

Recommended Commit Message:

Verify .NET 10.0 upgrade - all projects confirmed on target framework

- Confirmed all .NET projects targeting net10.0
- Verified all 14 packages compatible with .NET 10.0
- Built solution successfully with zero errors/warnings
- Executed all tests (acceptance + unit) - all passing
- Validated Shogi.Database.sqlproj remains on net472 as expected
- No security vulnerabilities detected
- All-At-Once strategy already completed

Assessment: Low complexity, verification complete

Alternative: Multiple commits if validation reveals issues requiring fixes:

• Commit 1: "Verify project files and target frameworks"
• Commit 2: "Fix [specific issue] discovered during validation"
• Commit 3: "Confirm all tests pass on .NET 10.0"

Code Review and Merge Process

Review Requirements: Minimal, since no code changes are expected

Checklist for Review (if formal review required):

• All projects verified on correct target framework
• Build succeeds with zero errors/warnings
• All tests pass (acceptance + unit)
• Documentation updated (if applicable)
• No new security vulnerabilities introduced
• Verification results documented

Merge Criteria:

• All validation checkpoints passed
• Tests are green
• No blocking issues discovered

Repository State

Current State (as noted by user):

• Branch: ssr
• Pending Changes: Exist (user requested to proceed without git operations)

Recommendation: Since user requested to skip git operations, work can proceed directly. However, best practice would be to:

1. Commit or stash pending changes before verification
2. Perform verification activities
3. Document results
4. Commit verification results separately

User Preference: Proceed without git operations - verification can be performed on current state.

Documentation Updates

Files to Update (if applicable):

• README.md: Confirm .NET 10.0 is documented as target framework
• CHANGELOG.md: Add entry for .NET 10.0 verification
• Deployment documentation: Update any .NET version references
• CI/CD configuration: Ensure build pipelines target .NET 10.0 SDK

All-At-Once Strategy Source Control Guidance

Since the All-At-Once upgrade appears to have already been completed (all projects simultaneously updated to net10.0), the source control strategy is retrospective:

Original Migration (already completed):

• Appears to have been done atomically (all projects upgraded together)
• Single-commit approach was likely used
• All package updates applied simultaneously
• Clean result with no intermediate states

Current Verification:

• Confirm the atomic upgrade was successful
• Validate no issues remain from the original migration
• Document the current verified state

---

Success Criteria

Technical Criteria

Project Framework Verification: ✅ Target Met (Pending Validation)

• All .NET projects target net10.0:
  • BoardRules\BoardRules.csproj: <TargetFramework>net10.0</TargetFramework>
  • Shogi\Shogi.csproj: <TargetFramework>net10.0</TargetFramework>
  • Tests\AcceptanceTests\Shogi.AcceptanceTests.csproj: <TargetFramework>net10.0</TargetFramework>
  • Tests\UnitTests\UnitTests.csproj: <TargetFramework>net10.0</TargetFramework>
• Shogi.Database\Shogi.Database.sqlproj correctly remains on net472

Package Compatibility: ✅ Target Met (Pending Validation)

• All 14 NuGet packages verified at .NET 10.0-compatible versions
• Zero packages with security vulnerabilities
• All package references restore successfully
• No package dependency conflicts

Build Success: 🔄 Requires Validation

• dotnet restore succeeds for entire solution
• dotnet build succeeds for entire solution (exit code 0)
• Zero compilation errors across all 5 projects
• Zero compilation warnings across all 5 projects
• All project references resolve correctly

Test Success: 🔄 Requires Validation

• All acceptance tests execute
• All acceptance tests pass (100% pass rate)
• All unit tests execute
• All unit tests pass (100% pass rate)
• Code coverage collection works (coverlet.collector)

Runtime Success: 🔄 Requires Validation (if applicable)

• Application starts successfully
• No runtime exceptions related to .NET version
• All major features functional
• Database connectivity works
• SignalR functionality operates (if used)
• Identity/authentication works (if used)

Quality Criteria

Code Quality: ✅ Already Maintained

• No new code quality issues introduced
• Existing code quality maintained
• No deprecated API usage warnings

Test Coverage: ✅ Already Maintained

• Test coverage maintained at previous levels
• No loss of test coverage
• All existing tests still relevant

Documentation: 🔄 Requires Update (if applicable)

• README updated to reference .NET 10.0 (if not already)
• Deployment documentation reflects .NET 10.0
• CI/CD pipeline documentation updated
• CHANGELOG includes .NET 10.0 verification entry

Process Criteria

All-At-Once Strategy Compliance: ✅ Already Applied

• All-At-Once approach was used (all projects upgraded simultaneously)
• No intermediate states exist
• All projects on same target framework (net10.0)
• Atomic upgrade principle followed

Verification Methodology: 🔄 Requires Execution

• Systematic project-by-project verification performed
• Solution-level build verification performed
• Comprehensive test execution completed
• Results documented

Source Control: 🔄 Conditional

• Verification results committed (if git operations performed)
• Documentation updates committed (if applicable)
• Clean working directory (or documented pending changes)

Completion Definition

The verification is complete and successful when:

1. ✅ All .NET projects confirmed on net10.0

   • Project files inspected and verified
   • Shogi.Database.sqlproj confirmed on net472 (as expected)

2. ✅ All packages confirmed compatible

   • 14 packages verified at compatible versions
   • Zero security vulnerabilities
   • No deprecated or obsolete packages

3. ✅ Solution builds successfully

   • Restore succeeds
   • Build succeeds with zero errors
   • Zero build warnings

4. ✅ All tests pass

   • Acceptance tests: 100% pass
   • Unit tests: 100% pass
   • No skipped or failing tests

5. ✅ Application runs correctly (if applicable)

   • Starts without errors
   • Core functionality verified
   • No runtime exceptions

6. ✅ Documentation updated (if applicable)

   • Version references corrected
   • Deployment guides updated
   • Verification documented

Acceptance Sign-Off

Criteria for Final Acceptance:

• All technical criteria marked complete ✅
• All quality criteria marked complete ✅
• All process criteria marked complete ✅
• No blocking issues remain
• Verification results documented and committed

Final Deliverable: Verified .NET 10.0 solution with documented validation results, all projects on target framework, all tests passing, ready for deployment.

Notes

This is a verification scenario, not an active migration. Success is measured by confirming the current state (net10.0) is correct and functional, not by completing migration activities. The assessment indicates the upgrade has already been completed successfully; verification activities will confirm this assessment is accurate.