Update changelogs for MTP 2.3 / MSTest 4.3 release

[Evangelink]

What

Reconcile main's changelogs with what actually shipped in the 2.3 / 4.3 release, using rel/4.3 as the source of truth, and stage the follow-up servicing/next-version entries.

Details

Entries moved (not present on rel/4.3 → next version)

• MTP (Changelog-Platform.md): Add --report-azdo-groups/--report-azdo-annotations on|off toggles #9542, Re-print errored assemblies in dotnet test end-of-run recap #9545, Add server-initiated session cancellation to the dotnet test IPC protocol (#8691) #9549 → 2.4.0
• MSTest (Changelog.md): Fix CloneWithUpdatedSource mutating this instead of the clone #9581 (Fixed) → 4.4.0

#9670 was initially moved to 4.4.0 but is being backported to rel/4.3, so it stays under MSTest 4.3.0 (Changed).

MTP 2.3.0 finalized

• Marked released (2026-07-07).
• Artifacts list expanded beyond the previous 9-package template to reflect what actually ships:
  • Stable (2.3.0): core packages + AzureDevOpsReport, HtmlReport, VSTestBridge (all inherit the default TestingPlatformVersionPrefix, packable, no override).
  • Experimental (1.0.0-alpha.26357.13): CtrfReport, GitHubActionsReport, JUnitReport, Logging, PackagedApp, VideoRecorder (independently/alpha versioned).

MTP 2.3.1 (new, UNRELEASED)

• Servicing section for the MissingMethodException regression from 2.3.0 (System.MissingMethodException after upgrade to 2.3.0 #9710), fixed by Fix forward-compat crash loading old 2.x extensions on .NET Framework (#9710) #9739 and backported to rel/4.3 via Fix forward-compat crash loading old 2.x extensions on .NET Framework (#9710) by @Evangelink in #9739 (backport to rel/4.3) #9740.

MSTest 4.3.0

• Kept UNRELEASED (about to release).

Notes

• AzureFoundry, OpenTelemetry, and Platform.AI are excluded from the 2.3.0 artifacts (AzureFoundry is IsShipping=false; the other two aren't referenced by any 2.3 changelog entry).

Co-authored-by: Copilot App 223556219+Copilot@users.noreply.github.com

[github-actions]

Note

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Summary

Clean documentation PR that correctly reconciles the changelogs with the rel/4.3 release branch. No issues found.

Dimension Verdicts

#	Dimension	Verdict
1	Algorithmic Correctness	N/A (docs only)
2	Threading & Concurrency	N/A
3	Security & IPC Contract Safety	N/A
4	Public API & Binary Compatibility	N/A
5	Performance & Allocations	N/A
6	Cross-TFM Compatibility	N/A
7	Error Handling & Diagnostics	N/A
8	Resource Management	N/A
9	Naming & Readability	✅ Clean
10	Documentation & Comments	✅ Clean
11	Test Quality	N/A
12	Build & Packaging	N/A
13	Localization	N/A
14	Backward Compatibility	N/A
15	Code Style & Formatting	✅ Clean
16	Scope Discipline	✅ Single concern
17	IPC Wire Format	N/A
18	Cancellation & Timeout	N/A
19	Configuration & Options	N/A
20	Logging & Telemetry	N/A
21	Platform Interop	N/A
22	Script & Automation Hygiene	N/A

Observations

• Entries correctly moved: PRs #9542, #9545, #9549 → MTP 2.4.0; #9581, #9670 → MSTest 4.4.0. Confirmed these are absent from the 2.3.0/4.3.0 release branch.
• Version alignment confirmed: eng/Versions.props shows 4.4.0 / 2.4.0 on main, consistent with the new UNRELEASED sections.
• Comparison links correct: All See full log links use the repo's v4.x.x tag convention (shared repo tag for both products).
• Keep a Changelog conventions followed: Section ordering (Added → Fixed → Changed), date format, and anchor naming are all consistent.
• 4.3.0 intentionally UNRELEASED: Per PR description, the MSTest 4.3.0 NuGet is about to ship; this is a reasonable interim state.
• One non-blocking note (inline): The 2.3.0 Artifacts list might be incomplete for newly-stable extensions (HtmlReport, JUnitReport, CtrfReport, Logging) if they ship as their own packages.

[Copilot]

Pull request overview

This PR reconciles main's changelogs with what actually shipped in the MTP 2.3 / MSTest 4.3 release, using rel/4.3 as the source of truth. Five entries that were listed under the UNRELEASED 2.3.0 / 4.3.0 sections on main but never made it into rel/4.3 are moved down to the next version (2.4.0 / 4.4.0, matching eng/Versions.props), and the Platform 2.3.0 section is finalized as released. I verified the core claim directly against rel/4.3: #9581/#9670 are absent from its Changelog.md, #9542/#9545/#9549 are absent from its Changelog-Platform.md, and #9641 (which the PR correctly keeps in 2.3.0) is present. The version-prefix convention (Platform 2.N.M ↔ MSTest tag v4.N.M) and the finalized date (2026-07-07, in the past) are also consistent.

Changes:

• Move unshipped MTP entries (#9542, #9545, #9549) into a new 2.4.0 - UNRELEASED section in Changelog-Platform.md, and finalize 2.3.0 as 2026-07-07 with a 9-package Artifacts block.
• Move unshipped MSTest entries (#9581 Fixed, #9670 Changed) into a new 4.4.0 - UNRELEASED section in Changelog.md.
• Keep MSTest 4.3.0 as UNRELEASED (about to release).

Show a summary per file

File	Description
docs/Changelog-Platform.md	Adds 2.4.0 - UNRELEASED, relocates #9542/#9545/#9549 there, finalizes 2.3.0 (date + Artifacts list).
docs/Changelog.md	Adds 4.4.0 - UNRELEASED, relocates #9581 (Fixed) and #9670 (Changed) there.

One observation worth confirming: the finalized 2.3.0 Artifacts list reuses the trimmed 9-package template from 2.2.2/2.2.3, but VSTestBridge, AzureDevOpsReport, and HtmlReport also build as 2.3.0 packages (inherited VersionPrefix + IsPackable=true, no override), and the PR note's candidate set (JUnitReport/CtrfReport/Logging) is inaccurate since those are versioned independently. This should be reconciled against the actually-published set.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Medium

[Copilot]

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 2
• Review effort level: Medium

[Copilot]

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0 new
• Review effort level: Medium