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Do not activate for IDE-based builds (Visual Studio already uses a long-lived process).\"\nlicense: MIT\n---\n\n# MSBuild Server for CLI Caching\n\nUse the MSBuild Server to cache evaluation results across CLI builds, matching the performance advantage Visual Studio gets from its long-lived MSBuild process.\n\n## When to Use\n\n- Small incremental builds from CLI (`dotnet build`) are slower than expected\n- Developers notice that VS builds are faster than CLI builds for the same project\n- CI agents run many sequential builds of the same repo\n\n## When Not to Use\n\n- IDE-based builds (Visual Studio already uses a long-lived MSBuild process)\n- One-off builds where cold-start overhead is acceptable\n- Build correctness issues are suspected (disable the server to isolate the problem)\n\n## Inputs\n\n| Input | Required | Description |\n|-------|----------|-------------|\n| Shell context | No | The shell where the environment variable will be set (bash, PowerShell, or Windows persistent) |\n\n## Workflow\n\n### Step 1: Confirm CLI context\n\nVerify the developer is building from the command line (`dotnet build`), not from Visual Studio or another IDE. The MSBuild Server provides no benefit inside an IDE.\n\n### Step 2: Set the environment variable\n\n```bash\n# Bash \u002F CI\nexport MSBUILDUSESERVER=1\n\n# PowerShell\n$env:MSBUILDUSESERVER = \"1\"\n\n# Windows (persistent)\nsetx MSBUILDUSESERVER 1\n```\n\n### Step 3: Validate improvement\n\nRun two sequential builds of the same project and compare times:\n\n1. First build (cold): `dotnet build` -- server starts, no cache benefit\n2. 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DO NOT USE FOR: creating new projects (use create-blazor-project), JavaScript interop or calling browser APIs from Blazor (use use-js-interop), forms and validation (use collect-user-input), prerendering issues (use support-prerendering), HTTP data fetching patterns (use fetch-and-send-data), coordinating state between unrelated components (use coordinate-components).\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[600,601,604,607,610],{"name":537,"slug":538,"type":15},{"name":602,"slug":603,"type":15},"Blazor","blazor",{"name":605,"slug":606,"type":15},"C#","csharp",{"name":608,"slug":609,"type":15},"UI Components","ui-components",{"name":611,"slug":612,"type":15},"Web Development","web-development","2026-07-15T06:03:29.216359",{"slug":615,"name":615,"fn":616,"description":617,"org":618,"tags":619,"stars":22,"repoUrl":23,"updatedAt":623},"binlog-failure-analysis","analyze MSBuild binary logs","Analyze MSBuild binary logs to diagnose build failures. USE FOR: build errors that are unclear from console output, diagnosing cascading failures across multi-project builds, tracing MSBuild target execution order, and generally any MSBuild build issues. Requires an existing .binlog file. DO NOT USE FOR: generating binlogs (use binlog-generation), non-MSBuild build systems.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[620,621,622],{"name":540,"slug":541,"type":15},{"name":543,"slug":544,"type":15},{"name":559,"slug":560,"type":15},"2026-07-12T08:21:34.637923",{"slug":625,"name":625,"fn":626,"description":627,"org":628,"tags":629,"stars":22,"repoUrl":23,"updatedAt":635},"binlog-generation","generate MSBuild binary logs for diagnostics","Generate MSBuild binary logs (binlogs) for build diagnostics and analysis. USE FOR: adding \u002Fbl:{} to any dotnet build, test, pack, publish, or restore command to capture a full build execution trace, prerequisite for binlog-failure-analysis and build-perf-diagnostics skills, enabling post-build investigation of errors or performance. Requires MSBuild 17.8+ \u002F .NET 8 SDK+ for {} placeholder; PowerShell needs -bl:{{}}. DO NOT USE FOR: non-MSBuild build systems (npm, Maven, CMake), analyzing an existing binlog (use binlog-failure-analysis instead).",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[630,633,634],{"name":631,"slug":632,"type":15},"Build","build",{"name":543,"slug":544,"type":15},{"name":20,"slug":21,"type":15},"2026-07-19T05:38:19.340791",96,{"items":638,"total":743},[639,651,658,665,673,679,687,693,699,709,722,733],{"slug":640,"name":640,"fn":641,"description":642,"org":643,"tags":644,"stars":648,"repoUrl":649,"updatedAt":650},"multithreaded-task-migration","migrate MSBuild tasks to multithreaded mode","Guide for migrating MSBuild tasks to multithreaded mode support, including compatibility red-team review. Use this when converting tasks to thread-safe versions, implementing IMultiThreadableTask, adding TaskEnvironment support, or auditing migrations for behavioral compatibility.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[645,646,647],{"name":537,"slug":538,"type":15},{"name":20,"slug":21,"type":15},{"name":13,"slug":14,"type":15},5535,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fmsbuild","2026-07-22T05:37:33.965588",{"slug":531,"name":531,"fn":532,"description":533,"org":652,"tags":653,"stars":22,"repoUrl":23,"updatedAt":546},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[654,655,656,657],{"name":537,"slug":538,"type":15},{"name":540,"slug":541,"type":15},{"name":543,"slug":544,"type":15},{"name":13,"slug":14,"type":15},{"slug":548,"name":548,"fn":549,"description":550,"org":659,"tags":660,"stars":22,"repoUrl":23,"updatedAt":561},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[661,662,663,664],{"name":537,"slug":538,"type":15},{"name":555,"slug":556,"type":15},{"name":543,"slug":544,"type":15},{"name":559,"slug":560,"type":15},{"slug":563,"name":563,"fn":564,"description":565,"org":666,"tags":667,"stars":22,"repoUrl":23,"updatedAt":579},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[668,669,670,671,672],{"name":537,"slug":538,"type":15},{"name":543,"slug":544,"type":15},{"name":571,"slug":572,"type":15},{"name":574,"slug":575,"type":15},{"name":577,"slug":578,"type":15},{"slug":581,"name":581,"fn":582,"description":583,"org":674,"tags":675,"stars":22,"repoUrl":23,"updatedAt":593},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[676,677,678],{"name":540,"slug":541,"type":15},{"name":588,"slug":589,"type":15},{"name":591,"slug":592,"type":15},{"slug":595,"name":595,"fn":596,"description":597,"org":680,"tags":681,"stars":22,"repoUrl":23,"updatedAt":613},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[682,683,684,685,686],{"name":537,"slug":538,"type":15},{"name":602,"slug":603,"type":15},{"name":605,"slug":606,"type":15},{"name":608,"slug":609,"type":15},{"name":611,"slug":612,"type":15},{"slug":615,"name":615,"fn":616,"description":617,"org":688,"tags":689,"stars":22,"repoUrl":23,"updatedAt":623},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[690,691,692],{"name":540,"slug":541,"type":15},{"name":543,"slug":544,"type":15},{"name":559,"slug":560,"type":15},{"slug":625,"name":625,"fn":626,"description":627,"org":694,"tags":695,"stars":22,"repoUrl":23,"updatedAt":635},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[696,697,698],{"name":631,"slug":632,"type":15},{"name":543,"slug":544,"type":15},{"name":20,"slug":21,"type":15},{"slug":700,"name":700,"fn":701,"description":702,"org":703,"tags":704,"stars":22,"repoUrl":23,"updatedAt":708},"build-parallelism","optimize MSBuild build parallelism","Diagnose and fix under-parallelized MSBuild builds. USE WHEN a multi-project solution build is slower than expected, doesn't speed up when you add cores, pegs a single core while others idle, or you want to know why `-m` isn't helping. Note: `\u002Fmaxcpucount` default is 1 (sequential) — always pass `-m` for parallel builds. Covers finding the critical path (longest serial ProjectReference chain), graph build (`\u002Fgraph`), BuildInParallel, and solution filters (`.slnf`). DO NOT USE FOR: single-project builds, incremental issues (use incremental-build), compilation slowness inside one project (use build-perf-diagnostics), non-MSBuild build systems.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[705,706,707],{"name":537,"slug":538,"type":15},{"name":20,"slug":21,"type":15},{"name":13,"slug":14,"type":15},"2026-07-19T05:38:18.364937",{"slug":710,"name":710,"fn":711,"description":712,"org":713,"tags":714,"stars":22,"repoUrl":23,"updatedAt":721},"build-perf-baseline","establish and optimize build performance baselines","Establish build performance baselines and apply systematic optimization techniques. USE FOR: diagnosing slow builds, establishing before\u002Fafter measurements (cold, warm, no-op scenarios), applying optimization strategies like MSBuild Server, static graph builds, artifacts output, and dependency graph trimming. Start here before diving into build-perf-diagnostics, incremental-build, or build-parallelism. DO NOT USE FOR: non-MSBuild build systems, detailed bottleneck analysis (use build-perf-diagnostics after baselining).",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[715,716,719,720],{"name":20,"slug":21,"type":15},{"name":717,"slug":718,"type":15},"Monitoring","monitoring",{"name":13,"slug":14,"type":15},{"name":591,"slug":592,"type":15},"2026-07-12T08:21:35.865649",{"slug":723,"name":723,"fn":724,"description":725,"org":726,"tags":727,"stars":22,"repoUrl":23,"updatedAt":732},"build-perf-diagnostics","diagnose MSBuild build performance bottlenecks","Diagnose MSBuild build performance bottlenecks using binary log analysis. USE FOR: identifying why builds are slow by analyzing binlog performance summaries, detecting ResolveAssemblyReference (RAR) taking >5s, Roslyn analyzers consuming >30% of Csc time, single targets dominating >50% of build time, node utilization below 80%, excessive Copy tasks, NuGet restore running every build. Covers timeline analysis, Target\u002FTask Performance Summary interpretation, and 7 common bottleneck categories. Use after build-perf-baseline has established measurements. DO NOT USE FOR: establishing initial baselines (use build-perf-baseline first), fixing incremental build issues (use incremental-build), parallelism tuning (use build-parallelism), non-MSBuild build systems.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[728,729,730,731],{"name":537,"slug":538,"type":15},{"name":543,"slug":544,"type":15},{"name":20,"slug":21,"type":15},{"name":13,"slug":14,"type":15},"2026-07-12T08:21:40.961722",{"slug":734,"name":734,"fn":735,"description":736,"org":737,"tags":738,"stars":22,"repoUrl":23,"updatedAt":742},"check-bin-obj-clash","detect MSBuild output path conflicts","Detects MSBuild projects with conflicting OutputPath or IntermediateOutputPath. USE FOR: builds failing with 'Cannot create a file when that file already exists', 'The process cannot access the file because it is being used by another process', intermittent build failures that succeed on retry, or missing\u002Foverwritten outputs in multi-project or multi-targeting builds where bin\u002Fobj (or project.assets.json) collide. Common causes: shared OutputPath, missing AppendTargetFrameworkToOutputPath, extra global properties (e.g. PublishReadyToRun), or SetTargetFramework on a ProjectReference to a single-targeting project. DO NOT USE FOR: file access errors unrelated to MSBuild (OS-level locking), single-project single-TFM builds, non-MSBuild build systems.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[739,740,741],{"name":543,"slug":544,"type":15},{"name":20,"slug":21,"type":15},{"name":588,"slug":589,"type":15},"2026-07-19T05:38:14.336279",144]