Update release notes for v5.0 beta

Prepare CHANGELOG.md and releasenotes.props for upcoming v5.0 beta release with:
- Breaking changes (drop .NET Standard 2 and < .NET 6 support)
- New AOT support feature
- Multiple bug fixes and improvements
- Update prepare-release skill documentation for pre-release handling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Author: natemcmaster

.claude/skills/prepare-release/SKILL.md

@@ -72,20 +72,40 @@ X.Y.Z patch:
 
 **Format:** `* [@contributor]: description ([#PR])`
 
+**For pre-releases (beta, rc):**
+- Add changes under existing "Unreleased changes" section (do NOT create new version header)
+- Update the comparison link to point from last stable tag to main branch HEAD
+- Rationale: Build number suffix (e.g., `-beta.{BUILD_NUMBER}`) is unknown until CI runs
+
 ```markdown
-## [vX.Y.Z](https://github.com/natemcmaster/CommandLineUtils/compare/vX.Y.Z-1...vX.Y.Z)
+## [Unreleased changes](https://github.com/natemcmaster/CommandLineUtils/compare/vX.Y.Z...main)
 
-### Features
+### Breaking changes
 * [@user]: description ([#123])
 
-### Fixes
+### Features
 * [@user]: description ([#124])
 
+### Fixes
+* [@user]: description ([#125])
+
 [#123]: https://github.com/natemcmaster/CommandLineUtils/pull/123
 [#124]: https://github.com/natemcmaster/CommandLineUtils/pull/124
+[#125]: https://github.com/natemcmaster/CommandLineUtils/pull/125
 ```
 
-Insert after "Unreleased changes" line.
+**For stable releases:**
+- Create new version header with exact tag comparison
+- Insert AFTER "Unreleased changes" section
+
+```markdown
+## [vX.Y.Z](https://github.com/natemcmaster/CommandLineUtils/compare/vX.Y.Z-1...vX.Y.Z)
+
+### Features
+* [@user]: description ([#123])
+
+[#123]: https://github.com/natemcmaster/CommandLineUtils/pull/123
+```
 
 ### 6. Update Directory.Build.props
 

CHANGELOG.md

@@ -1,6 +1,58 @@
 # Changelog
 
-[Unreleased changes](https://github.com/natemcmaster/CommandLineUtils/compare/v4.0.2...HEAD):
+## [Unreleased changes](https://github.com/natemcmaster/CommandLineUtils/compare/v4.1.1...main)
+
+### Breaking changes
+* [@natemcmaster]: drop support for .NET Standard 2 and < .NET 6
+
+### Features
+* [@robertmclaws]: Full AOT Support for .NET 8+ ([#582])
+* [@magneticflux-]: Allow overridden properties that inherit attributes ([#556])
+
+### Fixes
+* [@natemcmaster]: Fix AOT code generation type safety issues ([#583])
+* [@sensslen]: Properly determine allowed values for multiple values arguments ([#553])
+* [@natemcmaster]: Correct bugs in multiple value enum option help text ([#563])
+* [@natemcmaster]: Normalize line endings in PowerShell scripts
+* [@natemcmaster]: Update .NET settings in CI builds ([#564])
+
+### Docs
+* [@tlogik]: Fix incorrect validation example ([#551])
+
+### Other
+* [@Chris-Wolfgang]: Upgrade dotnet and dependencies to latest LTS versions ([#561])
+* [@natemcmaster]: Update tests to .NET 10
+* [@natemcmaster]: Use NuGet trusted publishing with OIDC
+* [@dependabot]: Update GitHub Actions ([#568])
+* [@natemcmaster]: Upgrade docfx to 2.78.4
+
+[#551]: https://github.com/natemcmaster/CommandLineUtils/pull/551
+[#553]: https://github.com/natemcmaster/CommandLineUtils/pull/553
+[#556]: https://github.com/natemcmaster/CommandLineUtils/pull/556
+[#561]: https://github.com/natemcmaster/CommandLineUtils/pull/561
+[#563]: https://github.com/natemcmaster/CommandLineUtils/pull/563
+[#564]: https://github.com/natemcmaster/CommandLineUtils/pull/564
+[#568]: https://github.com/natemcmaster/CommandLineUtils/pull/568
+[#582]: https://github.com/natemcmaster/CommandLineUtils/pull/582
+[#583]: https://github.com/natemcmaster/CommandLineUtils/pull/583
+
+## [v4.1.1](https://github.com/natemcmaster/CommandLineUtils/compare/v4.1.0...v4.1.1)
+
+### Fixes
+* [@sallerga]: Fix unknown command throws System.InvalidOperationException: Enumeration already finished ([#542])
+
+[#541]: https://github.com/natemcmaster/CommandLineUtils/issues/541
+[#542]: https://github.com/natemcmaster/CommandLineUtils/pull/542
+[@sallerga]: https://github.com/sallerga
+
+## [v4.1.0](https://github.com/natemcmaster/CommandLineUtils/compare/v4.0.2...v4.1.0)
+
+### Changes
+* Drop support for .NET < 4.6.
+* [@danmoseley]: fix: find dotnet.exe correctly when DOTNET_ROOT is not set
+* [@natemcmaster]: fix: don't set DefaultValue to empty string for `string[]` options
+
+[@danmoseley]: https://github.com/danmoseley
 
 ## [v4.0.2](https://github.com/natemcmaster/CommandLineUtils/compare/v4.0.1...v4.0.2)
 

src/CommandLineUtils/releasenotes.props

@@ -1,5 +1,34 @@
 <Project>
   <PropertyGroup>
+    <PackageReleaseNotes Condition="$(VersionPrefix.StartsWith('5.0.'))">
+Changes since 4.1:
+
+Breaking changes:
+* @natemcmaster: drop support for .NET Standard 2 and &lt; .NET 6
+
+Features:
+* @robertmclaws: Full AOT Support for .NET 8+ (#582)
+* @magneticflux-: Allow overridden properties that inherit attributes (#556)
+
+Fixes:
+* @natemcmaster: Fix AOT code generation type safety issues (#583)
+* @sensslen: Properly determine allowed values for multiple values arguments (#553)
+* @natemcmaster: Correct bugs in multiple value enum option help text (#563)
+* @natemcmaster: Normalize line endings in PowerShell scripts
+* @natemcmaster: Update .NET settings in CI builds (#564)
+
+Docs:
+* @tlogik: Fix incorrect validation example (#551)
+
+Other:
+* @Chris-Wolfgang: Upgrade dotnet and dependencies to latest LTS versions (#561)
+* @natemcmaster: Update tests to .NET 10
+* @natemcmaster: Use NuGet trusted publishing with OIDC
+* @dependabot: Update GitHub Actions (#568)
+* @natemcmaster: Upgrade docfx to 2.78.4
+
+See more details here: https://github.com/natemcmaster/CommandLineUtils/blob/main/CHANGELOG.md#v500-beta
+    </PackageReleaseNotes>
     <PackageReleaseNotes Condition="$(VersionPrefix.StartsWith('4.1.'))">
 Changes since 4.0: