What's Changed

• Adopt MCP 2026-07-28 spec with legacy version negotiation by @slang25 in #772
• Fix concurrent cache corruption during recursive file-based app upgrades by @DamianEdwards in #788
• Fix: Parameter --maximum-version ignores exact version references by @chefarbeiter in #671
• Show a friendly message instead of crashing when a solution has no projects by @DanielC000 in #771
• Surface package-upgrade stdout so failures are diagnosable by @timabell in #790
• Fix multiline central package version updates by @onuracar-dev in #783
• Support versioned MSBuild project SDKs in project files by @thomhurst in #793
• Preserve whitespace in Directory.Packages.props during upgrades by @symbiogenesis in #803
• Treat package references injected by custom SDKs as auto-referenced by @thomhurst in #795
• Preserve version ranges when upgrading packages by @GREsau in #702
• Preserve MSBuild version variables across project and props files by @symbiogenesis in #805
• Replace McMaster command-line parsing with System.CommandLine by @slang25 in #808
• Bump version to 4.9.0 by @slang25 in #806

New Contributors

• @chefarbeiter made their first contribution in #671
• @DanielC000 made their first contribution in #771
• @timabell made their first contribution in #790
• @onuracar-dev made their first contribution in #783
• @thomhurst made their first contribution in #793
• @GREsau made their first contribution in #702

Full Changelog: v4.8.1...v4.9.0

What's Changed

• Add #:sdk support for .NET file-based apps by @devlead in #755

New Contributors

• @devlead made their first contribution in #755

Full Changelog: v4.8.0...v4.8.1

What's Changed

• Add .NET file-based app support by @DamianEdwards in #752

New Contributors

• @DamianEdwards made their first contribution in #752

Full Changelog: v4.7.2...v4.8.0

What's Changed

• Fix MCP server crash: missing IVariableTrackingService DI registration by @Copilot in #729
• Fix NullReferenceException when GetLockFile returns null (#740) by @tymarats in #741
• Fix CI: pass short framework name to dotnet add package on upgrade by @slang25 in #750

New Contributors

• @tymarats made their first contribution in #741

Full Changelog: v4.7.1...v4.7.2

What's Changed

• Fix --no-restore corrupting .csproj in CPM projects by @slang25 in #713
• Add Claude Code GitHub Workflow by @slang25 in #716
• Preserve MSBuild variable references when upgrading packages by @hwoodiwiss in #714

New Contributors

• @hwoodiwiss made their first contribution in #714

Full Changelog: v4.7.0...v4.7.1

What's Changed

• Implement Model Context Protocol (MCP) server with command handling and JSON-RPC support by @spboyer in #696
• feat(dotnet): make dotnet command timeout configurable by @aomader in #701
• Remove specialized code for Central Package Management by @dougwaldron in #697
• fix CS0618 warning by @edwardmiller-mesirow in #667

New Contributors

• @spboyer made their first contribution in #696
• @aomader made their first contribution in #701
• @dougwaldron made their first contribution in #697

Full Changelog: v4.6.9...v4.7.0

What's Changed

• Bump the system-io-abstractions group with 2 updates by @dependabot[bot] in #663
• Bump System.Formats.Asn1 from 9.0.2 to 9.0.3 by @dependabot[bot] in #661
• Bump Microsoft.Extensions.DependencyInjection from 9.0.2 to 9.0.3 by @dependabot[bot] in #662
• Fix version detection of transitive dependencies by @janno-p in #669
• Set RollForward=Major by @eerhardt in #675

New Contributors

• @janno-p made their first contribution in #669
• @eerhardt made their first contribution in #675

Full Changelog: v4.6.8...v4.6.9

What's Changed

• Remove incorrect call to restore when the runtime parameter is empty by @sowa705 in #658
• feat: support slnx by @WeihanLi in #652

New Contributors

• @sowa705 made their first contribution in #658
• @WeihanLi made their first contribution in #652

Full Changelog: v4.6.7...v4.6.8

What's Changed

• Fix processing issue when including transitive dependencies by @slang25 in #645

Full Changelog: v4.6.6...v4.6.7

What's Changed

• Remove overly verbose logging by @slang25 in #643

Full Changelog: v4.6.5...v4.6.6