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Bump main to 18.9.0 after vs18.8 snap - #13880

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rainersigwald merged 2 commits into
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OvesN:veronikao/bump-main-18.9
May 27, 2026
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Bump main to 18.9.0 after vs18.8 snap#13880
rainersigwald merged 2 commits into
dotnet:mainfrom
OvesN:veronikao/bump-main-18.9

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@OvesN

@OvesN OvesN commented May 27, 2026

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Phase 2 of the 18.8 release checklist: bump main to 18.9 now that vs18.8 has been snapped.

Changes

  • VersionPrefix: 18.8.018.9.0
  • PackageValidationBaselineVersion: 18.7.0-preview-26230-0218.8.0-preview-26276-02
    • This is the latest 18.8.0-preview-* MSBuild build produced from the vs18.8 branch-point commit (b210215ff8, official build 20260526.2) and present on the public dotnet-tools feed — i.e. the ApiCompat baseline cannot drift forward into 18.9-content builds wearing 18.8 branding.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@OvesN
OvesN requested a review from a team as a code owner May 27, 2026 14:51
Copilot AI review requested due to automatic review settings May 27, 2026 14:51

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Pull request overview

Bumps main’s versioning properties forward to start the 18.9 development cycle after the vs18.8 snap, and updates the ApiCompat baseline to an 18.8-branded build to avoid baseline drift into 18.9 content.

Changes:

  • Update VersionPrefix from 18.8.0 to 18.9.0.
  • Update PackageValidationBaselineVersion from 18.7.0-preview-26230-02 to 18.8.0-preview-26276-02.

@OvesN OvesN mentioned this pull request May 27, 2026
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✅ 24/24 dimensions clean — no findings.

Standard release-cycle version bump (18.8.018.9.0) with correctly updated PackageValidationBaselineVersion tracking the previous minor version (18.8.0-preview-26276-02). No behavioral, API, or infrastructure concerns.

Note

🔒 Integrity filter blocked 2 items

The following items were blocked because they don't meet the GitHub integrity level.

  • #13880 pull_request_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
  • #13880 pull_request_read: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by Expert Code Review (on open) for issue #13880 · ● 2.4M

@rainersigwald
rainersigwald enabled auto-merge (squash) May 27, 2026 19:10
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Most things are passing and I'm antsy about the version being wrong so I'm going to bypass the remaining.

@rainersigwald
rainersigwald disabled auto-merge May 27, 2026 20:10
@rainersigwald
rainersigwald merged commit 4222d79 into dotnet:main May 27, 2026
6 of 9 checks passed
This was referenced Aug 12, 2026
WarperSan pushed a commit to WarperSan/ThunderPipe that referenced this pull request Aug 12, 2026
Updated
[Microsoft.Build.Utilities.Core](https://github.com/dotnet/msbuild) from
18.8.2 to 18.9.6.

<details>
<summary>Release notes</summary>

_Sourced from [Microsoft.Build.Utilities.Core's
releases](https://github.com/dotnet/msbuild/releases)._

## 18.9.6

## What's Changed
* [vs18.6] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13793
* [vs18.0] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13859
* [vs18.6] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13858
* [vs18.7] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13863
* CsWin32 follow-up: CLR metadata + TypeLib interop migration by
@​JeremyKuhne in dotnet/msbuild#13853
* Update vmr-sb-validation.yml for Azure Pipelines by @​meghnave in
dotnet/msbuild#13871
* Test: keep shell alive 15s in ToolTaskCanChangeCanonicalErrorFormat
(#​13734) by @​jankratochvilcz in
dotnet/msbuild#13878
* Add vs18.8 to merge-flow config by @​OvesN in
dotnet/msbuild#13877
* Stable branding for 18.8 release by @​OvesN in
dotnet/msbuild#13883
* Bump main to 18.9.0 after vs18.8 snap by @​OvesN in
dotnet/msbuild#13880
* Avoid checkout in insertion pipeline by @​rainersigwald in
dotnet/msbuild#13887
* Report actual launch path in MSB4216 for Runtime="NET" task host by
@​ViktorHofer in dotnet/msbuild#13889
* Migrate Tlblmp and AxImp to Multithreaded Execution by @​AlesProkop in
dotnet/msbuild#13708
* Replace ErrorUtilities assertion methods with Assumed API and BCL
throw helpers by @​DustinCampbell in
dotnet/msbuild#13790
* Fix CLR_E_SHIM_RUNTIMELOAD in RAR's IMetaDataDispenser activation by
@​JeremyKuhne in dotnet/msbuild#13899
* [main] Update dependencies from nuget/nuget.client by
@​dotnet-maestro[bot] in dotnet/msbuild#13905
* [main] Update dependencies from dotnet/arcade by @​dotnet-maestro[bot]
in dotnet/msbuild#13907
* [main] Update dependencies from dotnet/roslyn by @​dotnet-maestro[bot]
in dotnet/msbuild#13910
* [vs17.14] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13908
* [vs18.0] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13906
* Fix ToolTask output loss: increase EOF pipe timeout from 2s to 30s by
@​huulinhnguyen-dev in dotnet/msbuild#13767
* Improve symlink cycle condition by @​GangWang01 in
dotnet/msbuild#13901
* [vs18.6] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13904
* Add flaky-test detection and auto-fix agentic workflows by
@​ViktorHofer in dotnet/msbuild#13915
* Quote --ignore-exit-code values so the quarantine pipeline does not
shell-split on Unix by @​ViktorHofer in
dotnet/msbuild#13918
* Fix flaky-test detector PR-evidence loss and raise scan limits by
@​ViktorHofer in dotnet/msbuild#13919
* Tighten the pr review agent by @​JanKrivanek in
dotnet/msbuild#13921
* Add environment variables for governance detection by @​ViktorHofer in
dotnet/msbuild#13920
* Change IsPackable to true and add IsShipping flag by @​ViktorHofer in
dotnet/msbuild#13924
* [vs18.7] Update dependencies from dotnet/arcade by
@​dotnet-maestro[bot] in dotnet/msbuild#13911
* Make flaky detector verify recurrence postdates the fix before
commenting by @​ViktorHofer in
dotnet/msbuild#13930
* Fix AbsolutePath.GetCanonicalForm process state leak on Windows by
@​OvesN in dotnet/msbuild#13788
* Fix flaky detector: unblock dnceng feed, fail fast, and defer
quarantine to a second run by @​ViktorHofer in
dotnet/msbuild#13936
* Update documentation for ImplicitUsings element by @​drewnoakes in
dotnet/msbuild#13900
* [vs18.6] Point OptProf bootstrapper at rel/stable instead of int.main
by @​AlesProkop in dotnet/msbuild#13923
* Add CS8618 suppressor for required MSBuild task properties by
@​AArnott in dotnet/msbuild#13926
* Tighten NodeLaunchData.EnvironmentOverrides nullability to
IDictionary<string, string?>? by @​OvesN with @​Copilot in
dotnet/msbuild#13815
* Fix ToolTask EOF wait to be STA-safe via CountdownEvent (MSB4018 in
AspNetCompiler) by @​YuliiaKovalova in
dotnet/msbuild#13917
* [automated] Merge branch 'vs18.6' => 'vs18.7' by @​github-actions[bot]
in dotnet/msbuild#13941
* Localized file check-in by OneLocBuild Task: Build definition ID 9434:
Build ID 14192258 by @​dotnet-bot in
dotnet/msbuild#13849
* Bumping to 10.0.8 runtime packages by @​OvesN in
dotnet/msbuild#13898
* Flaky-test workflow: reassure on empty PR list + drop local
reproduction (quarantine-first) by @​ViktorHofer in
dotnet/msbuild#13938
* [Flaky Test] Un-quarantine 5 consistently-green tests by
@​github-actions[bot] in dotnet/msbuild#13952
* Flaky-test detector: open PRs ready-for-review; drop
newly-filed-issues section from PR body by @​ViktorHofer in
dotnet/msbuild#13958
* [Flaky Test] Quarantine 4 flaky tests by @​github-actions[bot] in
dotnet/msbuild#13937
* Flaky-test: fix duplicate-issue bug by switching dedup key to a
visible code-block key by @​ViktorHofer in
dotnet/msbuild#13963
* CsWin32 follow-up: WindowsNative + VS Setup Configuration + remaining
hand-rolled interop by @​JeremyKuhne in
dotnet/msbuild#13872
* Add the reviewer release skill checking if the Learn article Change
waves is updated by @​GangWang01 in
dotnet/msbuild#13840
* [main] Source code updates from dotnet/dotnet by @​dotnet-maestro[bot]
in dotnet/msbuild#13977
 ... (truncated)

Commits viewable in [compare
view](dotnet/msbuild@v18.8.2...v18.9.6).
</details>

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3 participants