[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill-dotnet-migrate-dotnet10-to-dotnet11":3,"mdc-n01tnf-key":31,"related-org-dotnet-migrate-dotnet10-to-dotnet11":2138,"related-repo-dotnet-migrate-dotnet10-to-dotnet11":2305},{"slug":4,"name":4,"fn":5,"description":6,"org":7,"tags":11,"stars":19,"repoUrl":20,"updatedAt":21,"license":22,"forks":23,"topics":24,"repo":26,"sourceUrl":29,"mdContent":30},"migrate-dotnet10-to-dotnet11","migrate .NET 10 projects to .NET 11","Migrate a .NET 10 project or solution to .NET 11 and resolve all breaking changes. This is a MIGRATION skill — use it when upgrading from .NET 10 to .NET 11, NOT for writing new programs. USE FOR: upgrading TargetFramework from net10.0 to net11.0, fixing build errors after updating the .NET 11 SDK, resolving source-breaking and behavioral changes in .NET 11 runtime, C# 15 compiler, and EF Core 11, adapting to updated minimum hardware requirements (x86-64-v2, Arm64 LSE), and updating CI\u002FCD pipelines and Dockerfiles for .NET 11. DO NOT USE FOR: .NET Framework migrations, upgrading from .NET 9 or earlier, greenfield .NET 11 projects, or cosmetic modernization unrelated to the upgrade. NOTE: .NET 11 is in preview. Covers breaking changes through Preview 3.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},"dotnet",".NET (Microsoft)","https:\u002F\u002Fpexgzepcugksgbtrxkhf.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Forg-logos\u002Fdotnet.png",[12,16],{"name":13,"slug":14,"type":15},".NET","net","tag",{"name":17,"slug":18,"type":15},"Migration","migration",4576,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fskills","2026-07-15T06:03:34.354783","MIT",332,[25],"agent-skills",{"repoUrl":20,"stars":19,"forks":23,"topics":27,"description":28},[25],"Repository for skills to assist AI coding agents with .NET and C#","https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fskills\u002Ftree\u002FHEAD\u002Fplugins\u002Fdotnet-upgrade\u002Fskills\u002Fmigrate-dotnet10-to-dotnet11","---\nname: migrate-dotnet10-to-dotnet11\ndescription: >\n  Migrate a .NET 10 project or solution to .NET 11 and resolve all breaking changes.\n  This is a MIGRATION skill — use it when upgrading from .NET 10 to .NET 11,\n  NOT for writing new programs.\n  USE FOR: upgrading TargetFramework from net10.0 to net11.0, fixing build errors\n  after updating the .NET 11 SDK, resolving source-breaking and behavioral changes\n  in .NET 11 runtime, C# 15 compiler, and EF Core 11, adapting to updated minimum\n  hardware requirements (x86-64-v2, Arm64 LSE), and updating CI\u002FCD pipelines and\n  Dockerfiles for .NET 11.\n  DO NOT USE FOR: .NET Framework migrations, upgrading from .NET 9 or earlier,\n  greenfield .NET 11 projects, or cosmetic modernization unrelated to the upgrade.\n  NOTE: .NET 11 is in preview. Covers breaking changes through Preview 3.\nlicense: MIT\n---\n\n# .NET 10 → .NET 11 Migration\n\nMigrate a .NET 10 project or solution to .NET 11, systematically resolving all breaking changes. The outcome is a project targeting `net11.0` that builds cleanly, passes tests, and accounts for every behavioral, source-incompatible, and binary-incompatible change introduced in .NET 11.\n\n> **Note:** .NET 11 is currently in preview. This skill covers breaking changes documented through Preview 3.\n\n## When to Use\n\n- Upgrading `TargetFramework` from `net10.0` to `net11.0`\n- Resolving build errors or new warnings after updating the .NET 11 SDK\n- Adapting to behavioral changes in .NET 11 runtime, ASP.NET Core 11, or EF Core 11\n- Updating CI\u002FCD pipelines, Dockerfiles, or deployment scripts for .NET 11\n- Fixing C# 15 compiler breaking changes after SDK upgrade\n\n## When Not to Use\n\n- The project already targets `net11.0` and builds cleanly — migration is done\n- Upgrading from .NET 9 or earlier — address the .NET 9→10 breaking changes first\n- Migrating from .NET Framework — that is a separate, larger effort\n- Greenfield projects that start on .NET 11 (no migration needed)\n\n## Inputs\n\n| Input | Required | Description |\n|-------|----------|-------------|\n| Project or solution path | Yes | The `.csproj`, `.sln`, or `.slnx` entry point to migrate |\n| Build command | No | How to build (e.g., `dotnet build`, a repo build script). Auto-detect if not provided |\n| Test command | No | How to run tests (e.g., `dotnet test`). Auto-detect if not provided |\n| Project type hints | No | Whether the project uses ASP.NET Core, EF Core, Cosmos DB, etc. Auto-detect from PackageReferences and SDK attributes if not provided |\n\n## Workflow\n\n> **Answer directly from the loaded reference documents for information about .NET 11 breaking changes.** You may inspect the local repository (project\u002Fsolution files, source code, configuration, build\u002Ftest scripts) as needed to determine which changes apply. Do not fetch web pages or other external sources for breaking change information — the loaded references are the authoritative source. Focus on identifying which breaking changes apply and providing concrete fixes.\n>\n> **Commit strategy:** Commit at each logical boundary — after updating the TFM (Step 2), after resolving build errors (Step 3), after addressing behavioral changes (Step 4), and after updating infrastructure (Step 5). This keeps each commit focused and reviewable.\n\n### Step 1: Assess the project\n\n1. Identify how the project is built and tested. Look for build scripts, `.sln`\u002F`.slnx` files, or individual `.csproj` files.\n2. Run `dotnet --version` to confirm the .NET 11 SDK is installed. If it is not, stop and inform the user.\n3. Determine which technology areas the project uses by examining:\n   - **SDK attribute**: `Microsoft.NET.Sdk.Web` → ASP.NET Core; `Microsoft.NET.Sdk.WindowsDesktop` with `\u003CUseWPF>` or `\u003CUseWindowsForms>` → WPF\u002FWinForms\n   - **PackageReferences**: `Microsoft.EntityFrameworkCore.*` → EF Core; `Microsoft.EntityFrameworkCore.Cosmos` → Cosmos DB provider\n   - **Dockerfile presence** → Container changes relevant\n   - **Cryptography API usage** → DSA on macOS affected; AIA cert download changes relevant\n   - **Compression API usage** → DeflateStream\u002FGZipStream\u002FZipArchive changes relevant\n   - **TAR API usage** → Header checksum validation and HardLink entry changes relevant\n   - **`NamedPipeClientStream` usage with `SafePipeHandle`** → SYSLIB0063 constructor obsoletion relevant\n   - **`BackgroundService` usage** → Unhandled exceptions now stop the host\n   - **`Microsoft.OpenApi` direct usage** → v3 API breaking changes in ASP.NET Core OpenAPI\n   - **EF Core SQL Server with Entra ID auth** → SqlClient 7.0 auth dependency changes\n   - **NativeAOT native libraries on Unix** → Output filename prefix changed\n4. Record which reference documents are relevant (see the reference loading table in Step 3).\n5. Do a **clean build** (`dotnet build --no-incremental` or delete `bin`\u002F`obj`) on the current `net10.0` target to establish a clean baseline. Record any pre-existing warnings.\n\n### Step 2: Update the Target Framework\n\n1. In each `.csproj` (or `Directory.Build.props` if centralized), change:\n   ```xml\n   \u003CTargetFramework>net10.0\u003C\u002FTargetFramework>\n   ```\n   to:\n   ```xml\n   \u003CTargetFramework>net11.0\u003C\u002FTargetFramework>\n   ```\n   For multi-targeted projects, add `net11.0` to `\u003CTargetFrameworks>` or replace `net10.0`.\n\n2. Update all `Microsoft.Extensions.*`, `Microsoft.AspNetCore.*`, `Microsoft.EntityFrameworkCore.*`, and other Microsoft package references to their 11.0.x versions. If using Central Package Management (`Directory.Packages.props`), update versions there.\n\n3. Run `dotnet restore`. Fix any restore errors before continuing.\n\n4. Run `dotnet build`. Capture all errors and warnings — these will be addressed in Step 3.\n\n### Step 3: Fix source-breaking and compilation changes\n\nLoad reference documents based on the project's technology areas:\n\n| Reference file | When to load |\n|----------------|-------------|\n| `references\u002Fcsharp-compiler-dotnet10to11.md` | Always (C# 15 compiler breaking changes) |\n| `references\u002Fcore-libraries-dotnet10to11.md` | Always (applies to all .NET 11 projects) |\n| `references\u002Fsdk-msbuild-dotnet10to11.md` | Always (SDK and build tooling changes) |\n| `references\u002Faspnetcore-dotnet10to11.md` | Project uses ASP.NET Core (OpenAPI, Blazor) |\n| `references\u002Fefcore-dotnet10to11.md` | Project uses Entity Framework Core |\n| `references\u002Fcryptography-dotnet10to11.md` | Project uses cryptography APIs, mTLS, or targets macOS |\n| `references\u002Fruntime-jit-dotnet10to11.md` | Deploying to older hardware, embedded devices, or using NativeAOT |\n\nWork through each build error systematically. Common patterns:\n\n1. **C# 15 Span collection expression safe-context** — Collection expressions of `Span\u003CT>`\u002F`ReadOnlySpan\u003CT>` type now have `declaration-block` safe-context. Code assigning span collection expressions to variables in outer scopes will error. Use array type or move the expression to the correct scope.\n\n2. **`ref readonly` delegates\u002Flocal functions need `InAttribute`** — If synthesizing delegates from `ref readonly`-returning methods or using `ref readonly` local functions, ensure `System.Runtime.InteropServices.InAttribute` is available.\n\n3. **`nameof(this.)` in attributes** — Remove `this.` qualifier; use `nameof(P)` instead of `nameof(this.P)`.\n\n4. **`with()` in collection expressions (C# 15)** — `with(...)` is now treated as constructor arguments, not a method call. Use `@with(...)` to call a method named `with`.\n\n5. **Dynamic `&&`\u002F`||` with interface operand** — Interface types as left operand of `&&`\u002F`||` with `dynamic` right operand now errors at compile time. Cast to concrete type or `dynamic`.\n\n6. **EF Core Cosmos sync I\u002FO removal** — `ToList()`, `SaveChanges()`, etc. on Cosmos provider always throw. Convert to async equivalents.\n\n7. **SYSLIB0063: `NamedPipeClientStream` `isConnected` parameter obsoleted** — The constructor overload taking `bool isConnected` is obsoleted. Remove the `isConnected` argument and use the new 3-parameter constructor. Projects with `TreatWarningsAsErrors` will fail to build.\n\n8. **`when` switch-expression-arm parsing** — `(X.Y) when` is now parsed as a constant pattern with a `when` clause instead of a cast expression, which can cause existing code to fail to compile or change meaning. Review switch expressions using `when` and adjust syntax as needed.\n\n9. **Microsoft.OpenApi v3 breaking changes** — `Microsoft.AspNetCore.OpenApi` now depends on `Microsoft.OpenApi` 3.x. Code using `Microsoft.OpenApi` types directly (`OpenApiDocument`, `OpenApiSchema`, etc.) will have compile errors. Follow the v3 upgrade guide.\n\n10. **EF Core Design package no longer transitive** — `Microsoft.EntityFrameworkCore.Tools` and `.Tasks` no longer depend on `.Design`. Add an explicit `PackageReference` if needed.\n\n11. **EFOptimizeContext MSBuild property removed** — Replace with `\u003CEFScaffoldModelStage>` and `\u003CEFPrecompileQueriesStage>`.\n\n### Step 4: Address behavioral changes\n\nThese changes compile successfully but alter runtime behavior. Review each one and determine impact:\n\n1. **DeflateStream\u002FGZipStream empty payload** — Now writes headers and footers even for empty payloads. If your code checks for zero-length output, update the check.\n\n2. **MemoryStream maximum capacity** — Maximum capacity updated and exception behavior changed. Review code that creates large MemoryStreams or relies on specific exception types.\n\n3. **TAR header checksum validation** — TAR-reading APIs now verify checksums. Corrupted or hand-crafted TAR files may now fail to read.\n\n4. **ZipArchive.CreateAsync eager loading** — `ZipArchive.CreateAsync` eagerly loads entries. May affect memory usage for large archives.\n\n5. **Environment.TickCount consistency** — Made consistent with Windows timeout behavior. Code relying on specific tick count behavior may need adjustment.\n\n6. **DSA removed from macOS** — DSA cryptographic operations throw on macOS. Use a different algorithm (RSA, ECDSA).\n\n7. **Japanese Calendar minimum date** — Minimum supported date corrected. Code using very early Japanese Calendar dates may be affected.\n\n8. **Minimum hardware requirements** — x86\u002Fx64 baseline moved to `x86-64-v2`; Windows Arm64 requires `LSE`. Verify deployment targets meet requirements.\n\n9. **Mono launch target for .NET Framework** — No longer set automatically. If using Mono for .NET Framework apps on Linux, specify explicitly.\n\n10. **Unhandled BackgroundService exceptions stop the host** — Exceptions from `ExecuteAsync()` now propagate and crash the host. Add try\u002Fcatch in background services that should not bring down the application.\n\n11. **ZipArchive CRC32 validation** — ZIP reads now validate CRC32 checksums. Corrupt or truncated archives that previously succeeded will now throw `InvalidDataException`.\n\n12. **TarWriter emits HardLink entries** — Hard-linked files are now written as `HardLink` entries instead of duplicated data. Consumers of .NET-produced tar archives must handle `HardLink` entries.\n\n13. **AIA certificate downloads disabled** — Server-side client-certificate validation no longer downloads intermediate CAs via AIA by default. Pre-install the full chain or have clients send intermediates.\n\n14. **Blazor Virtualize OverscanCount default changed** — Default `OverscanCount` changed from 3 to 15. Set explicitly if performance-sensitive.\n\n15. **Microsoft.Data.SqlClient 7.0 — Entra ID auth separated** — Azure\u002FEntra ID authentication dependencies removed from the core SqlClient package. Add `Microsoft.Data.SqlClient.Extensions.Azure` if using Entra ID auth.\n\n16. **SqlVector<T> excluded from SELECT** — Vector properties are no longer auto-loaded. Use explicit projections to include vector values.\n\n17. **SQLitePCLRaw encryption bundles removed** — `bundle_e_sqlcipher` and other encryption bundle packages removed in SQLitePCLRaw 3.0.\n\n18. **NativeAOT Unix native library `lib` prefix** — Output filenames now include `lib` prefix on Linux\u002FmacOS (e.g., `libMyLib.so`).\n\n### Step 5: Update infrastructure\n\n1. **Dockerfiles**: Update base images from 10.0 to 11.0:\n   ```dockerfile\n   # Before\n   FROM mcr.microsoft.com\u002Fdotnet\u002Fsdk:10.0 AS build\n   FROM mcr.microsoft.com\u002Fdotnet\u002Faspnet:10.0\n   # After\n   FROM mcr.microsoft.com\u002Fdotnet\u002Fsdk:11.0 AS build\n   FROM mcr.microsoft.com\u002Fdotnet\u002Faspnet:11.0\n   ```\n\n2. **CI\u002FCD pipelines**: Update SDK version references. If using `global.json`, update the `sdk.version` in your existing file while preserving other keys (such as `rollForward` and test configuration):\n   ```diff\n    {\n      \"sdk\": {\n   -    \"version\": \"10.0.100\",\n   -    \"rollForward\": \"latestFeature\"\n   +    \"version\": \"11.0.100-preview.3\",\n   +    \"rollForward\": \"latestFeature\"\n      },\n      \"otherSettings\": {\n        \"...\": \"...\"\n      }\n    }\n   ```\n\n3. **Hardware deployment targets**: Verify all deployment targets meet the updated minimum hardware requirements (x86-64-v2 for x86\u002Fx64, LSE for Windows Arm64).\n\n### Step 6: Verify\n\n1. Run a full clean build: `dotnet build --no-incremental`\n2. Run all tests: `dotnet test`\n3. If the application is containerized, build and test the container image\n4. Smoke-test the application, paying special attention to:\n   - Compression behavior with empty streams\n   - TAR file reading (checksum validation and HardLink entries)\n   - EF Core Cosmos DB operations (must be async)\n   - DSA usage on macOS\n   - Memory-intensive MemoryStream usage\n   - Span collection expression assignments\n   - BackgroundService exception handling\n   - mTLS \u002F client certificate chain validation\n   - EF Core SQL Server with Entra ID authentication\n   - NativeAOT output filenames on Unix\n5. Review the diff and ensure no unintended behavioral changes were introduced\n\n## Reference Documents\n\nThe `references\u002F` folder contains detailed breaking change information organized by technology area. 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Load only the references relevant to the project being migrated:",{"type":37,"tag":176,"props":2008,"children":2009},{},[2010,2024],{"type":37,"tag":180,"props":2011,"children":2012},{},[2013],{"type":37,"tag":184,"props":2014,"children":2015},{},[2016,2020],{"type":37,"tag":188,"props":2017,"children":2018},{},[2019],{"type":43,"value":810},{"type":37,"tag":188,"props":2021,"children":2022},{},[2023],{"type":43,"value":815},{"type":37,"tag":204,"props":2025,"children":2026},{},[2027,2042,2057,2072,2087,2102,2117],{"type":37,"tag":184,"props":2028,"children":2029},{},[2030,2038],{"type":37,"tag":211,"props":2031,"children":2032},{},[2033],{"type":37,"tag":52,"props":2034,"children":2036},{"className":2035},[],[2037],{"type":43,"value":830},{"type":37,"tag":211,"props":2039,"children":2040},{},[2041],{"type":43,"value":835},{"type":37,"tag":184,"props":2043,"children":2044},{},[2045,2053],{"type":37,"tag":211,"props":2046,"children":2047},{},[2048],{"type":37,"tag":52,"props":2049,"children":2051},{"className":2050},[],[2052],{"type":43,"value":847},{"type":37,"tag":211,"props":2054,"children":2055},{},[2056],{"type":43,"value":852},{"type":37,"tag":184,"props":2058,"children":2059},{},[2060,2068],{"type":37,"tag":211,"props":2061,"children":2062},{},[2063],{"type":37,"tag":52,"props":2064,"children":2066},{"className":2065},[],[2067],{"type":43,"value":864},{"type":37,"tag":211,"props":2069,"children":2070},{},[2071],{"type":43,"value":869},{"type":37,"tag":184,"props":2073,"children":2074},{},[2075,2083],{"type":37,"tag":211,"props":2076,"children":2077},{},[2078],{"type":37,"tag":52,"props":2079,"children":2081},{"className":2080},[],[2082],{"type":43,"value":881},{"type":37,"tag":211,"props":2084,"children":2085},{},[2086],{"type":43,"value":886},{"type":37,"tag":184,"props":2088,"children":2089},{},[2090,2098],{"type":37,"tag":211,"props":2091,"children":2092},{},[2093],{"type":37,"tag":52,"props":2094,"children":2096},{"className":2095},[],[2097],{"type":43,"value":898},{"type":37,"tag":211,"props":2099,"children":2100},{},[2101],{"type":43,"value":903},{"type":37,"tag":184,"props":2103,"children":2104},{},[2105,2113],{"type":37,"tag":211,"props":2106,"children":2107},{},[2108],{"type":37,"tag":52,"props":2109,"children":2111},{"className":2110},[],[2112],{"type":43,"value":915},{"type":37,"tag":211,"props":2114,"children":2115},{},[2116],{"type":43,"value":920},{"type":37,"tag":184,"props":2118,"children":2119},{},[2120,2128],{"type":37,"tag":211,"props":2121,"children":2122},{},[2123],{"type":37,"tag":52,"props":2124,"children":2126},{"className":2125},[],[2127],{"type":43,"value":932},{"type":37,"tag":211,"props":2129,"children":2130},{},[2131],{"type":43,"value":937},{"type":37,"tag":2133,"props":2134,"children":2135},"style",{},[2136],{"type":43,"value":2137},"html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"items":2139,"total":2304},[2140,2156,2171,2186,2204,2218,2238,2248,2260,2270,2283,2294],{"slug":2141,"name":2141,"fn":2142,"description":2143,"org":2144,"tags":2145,"stars":2153,"repoUrl":2154,"updatedAt":2155},"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},[2146,2147,2150],{"name":13,"slug":14,"type":15},{"name":2148,"slug":2149,"type":15},"Engineering","engineering",{"name":2151,"slug":2152,"type":15},"Performance","performance",5535,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fmsbuild","2026-07-22T05:37:33.965588",{"slug":2157,"name":2157,"fn":2158,"description":2159,"org":2160,"tags":2161,"stars":19,"repoUrl":20,"updatedAt":2170},"analyzing-dotnet-performance","analyze .NET code for performance anti-patterns","Scans .NET code for ~50 performance anti-patterns across async, memory, strings, collections, LINQ, regex, serialization, and I\u002FO with tiered severity classification. Use when analyzing .NET code for optimization opportunities, reviewing hot paths, or auditing allocation-heavy patterns.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2162,2163,2166,2169],{"name":13,"slug":14,"type":15},{"name":2164,"slug":2165,"type":15},"Code Analysis","code-analysis",{"name":2167,"slug":2168,"type":15},"Debugging","debugging",{"name":2151,"slug":2152,"type":15},"2026-07-12T08:23:25.400375",{"slug":2172,"name":2172,"fn":2173,"description":2174,"org":2175,"tags":2176,"stars":19,"repoUrl":20,"updatedAt":2185},"android-tombstone-symbolication","symbolicate .NET runtime frames in Android tombstones","Symbolicate the .NET runtime frames in an Android tombstone file. Extracts BuildIds and PC offsets from the native backtrace, downloads debug symbols from the Microsoft symbol server, and runs llvm-symbolizer to produce function names with source file and line numbers. USE FOR triaging a .NET MAUI or Mono Android app crash from a tombstone, resolving native backtrace frames in libmonosgen-2.0.so or libcoreclr.so to .NET runtime source code, or investigating SIGABRT, SIGSEGV, or other native signals originating from the .NET runtime on Android. DO NOT USE FOR pure Java\u002FKotlin crashes, managed .NET exceptions that are already captured in logcat, or iOS crash logs. INVOKES Symbolicate-Tombstone.ps1 script, llvm-symbolizer, Microsoft symbol server.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2177,2178,2181,2182],{"name":13,"slug":14,"type":15},{"name":2179,"slug":2180,"type":15},"Android","android",{"name":2167,"slug":2168,"type":15},{"name":2183,"slug":2184,"type":15},"Microsoft","microsoft","2026-07-12T08:23:21.595572",{"slug":2187,"name":2187,"fn":2188,"description":2189,"org":2190,"tags":2191,"stars":19,"repoUrl":20,"updatedAt":2203},"apple-crash-symbolication","symbolicate .NET runtime frames in crash logs","Symbolicate .NET runtime frames in Apple platform .ips crash logs (iOS, tvOS, Mac Catalyst, macOS). Extracts UUIDs and addresses from the native backtrace, locates dSYM debug symbols, and runs atos to produce function names with source file and line numbers. Automatically downloads .dwarf symbols from the Microsoft symbol server using Mach-O UUIDs. USE FOR triaging a .NET MAUI or Mono app crash from an .ips file on any Apple platform, resolving native backtrace frames in libcoreclr or libmonosgen-2.0 to .NET runtime source code, retrieving .ips crash logs from a connected iOS device or iPhone, or investigating EXC_CRASH, EXC_BAD_ACCESS, SIGABRT, or SIGSEGV originating from the .NET runtime. DO NOT USE FOR pure Swift\u002FObjective-C crashes with no .NET components, or Android tombstone files. INVOKES Symbolicate-Crash.ps1 script, atos, dwarfdump, idevicecrashreport.",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2192,2193,2194,2197,2200],{"name":13,"slug":14,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2195,"slug":2196,"type":15},"iOS","ios",{"name":2198,"slug":2199,"type":15},"macOS","macos",{"name":2201,"slug":2202,"type":15},"Observability","observability","2026-07-12T08:23:20.369986",{"slug":2205,"name":2205,"fn":2206,"description":2207,"org":2208,"tags":2209,"stars":19,"repoUrl":20,"updatedAt":2217},"assertion-quality","evaluate assertion quality in test suites","Analyzes the variety and depth of assertions across test suites in any language. Use when the user asks to evaluate assertion quality, find shallow tests, identify assertion-free tests (no assertions or only trivial ones like Assert.IsNotNull \u002F toBeTruthy()), flag self-referential or tautological assertions, measure assertion diversity, or audit whether tests verify different facets of behavior. Polyglot: .NET, Python, TS\u002FJS, Java, Go, Ruby, Rust, Swift, Kotlin, PowerShell, C++. DO NOT USE FOR: writing new tests (use code-testing-agent \u002F writing-mstest-tests), mutation reasoning about whether tests would catch a bug (use test-gap-analysis), or a general severity-ranked anti-pattern audit (use test-anti-patterns), fixing or rewriting assertions, or writing, fixing, or modernizing MSTest tests, assertions, or attributes (use writing-mstest-tests).",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2210,2211,2214],{"name":2164,"slug":2165,"type":15},{"name":2212,"slug":2213,"type":15},"QA","qa",{"name":2215,"slug":2216,"type":15},"Testing","testing","2026-07-12T08:23:51.277743",{"slug":2219,"name":2219,"fn":2220,"description":2221,"org":2222,"tags":2223,"stars":19,"repoUrl":20,"updatedAt":2237},"author-component","create and review Blazor components","Create or review Blazor components (.razor files) with correct architecture. USE FOR: writing new Blazor components that do NOT involve JavaScript interop, implementing parameters and EventCallback, RenderFragment slots, component lifecycle (OnInitializedAsync, OnParametersSet), async patterns, IAsyncDisposable, CancellationToken, CSS isolation, code-behind. 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},[2224,2225,2228,2231,2234],{"name":13,"slug":14,"type":15},{"name":2226,"slug":2227,"type":15},"Blazor","blazor",{"name":2229,"slug":2230,"type":15},"C#","csharp",{"name":2232,"slug":2233,"type":15},"UI Components","ui-components",{"name":2235,"slug":2236,"type":15},"Web Development","web-development","2026-07-15T06:03:29.216359",{"slug":2239,"name":2239,"fn":2240,"description":2241,"org":2242,"tags":2243,"stars":19,"repoUrl":20,"updatedAt":2247},"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},[2244,2245,2246],{"name":2164,"slug":2165,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2183,"slug":2184,"type":15},"2026-07-12T08:21:34.637923",{"slug":2249,"name":2249,"fn":2250,"description":2251,"org":2252,"tags":2253,"stars":19,"repoUrl":20,"updatedAt":2259},"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},[2254,2257,2258],{"name":2255,"slug":2256,"type":15},"Build","build",{"name":2167,"slug":2168,"type":15},{"name":2148,"slug":2149,"type":15},"2026-07-19T05:38:19.340791",{"slug":2261,"name":2261,"fn":2262,"description":2263,"org":2264,"tags":2265,"stars":19,"repoUrl":20,"updatedAt":2269},"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},[2266,2267,2268],{"name":13,"slug":14,"type":15},{"name":2148,"slug":2149,"type":15},{"name":2151,"slug":2152,"type":15},"2026-07-19T05:38:18.364937",{"slug":2271,"name":2271,"fn":2272,"description":2273,"org":2274,"tags":2275,"stars":19,"repoUrl":20,"updatedAt":2282},"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},[2276,2277,2280,2281],{"name":2148,"slug":2149,"type":15},{"name":2278,"slug":2279,"type":15},"Monitoring","monitoring",{"name":2151,"slug":2152,"type":15},{"name":2215,"slug":2216,"type":15},"2026-07-12T08:21:35.865649",{"slug":2284,"name":2284,"fn":2285,"description":2286,"org":2287,"tags":2288,"stars":19,"repoUrl":20,"updatedAt":2293},"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},[2289,2290,2291,2292],{"name":13,"slug":14,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2148,"slug":2149,"type":15},{"name":2151,"slug":2152,"type":15},"2026-07-12T08:21:40.961722",{"slug":2295,"name":2295,"fn":2296,"description":2297,"org":2298,"tags":2299,"stars":19,"repoUrl":20,"updatedAt":2303},"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},[2300,2301,2302],{"name":2167,"slug":2168,"type":15},{"name":2148,"slug":2149,"type":15},{"name":2212,"slug":2213,"type":15},"2026-07-19T05:38:14.336279",144,{"items":2306,"total":2355},[2307,2314,2321,2329,2335,2343,2349],{"slug":2157,"name":2157,"fn":2158,"description":2159,"org":2308,"tags":2309,"stars":19,"repoUrl":20,"updatedAt":2170},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2310,2311,2312,2313],{"name":13,"slug":14,"type":15},{"name":2164,"slug":2165,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2151,"slug":2152,"type":15},{"slug":2172,"name":2172,"fn":2173,"description":2174,"org":2315,"tags":2316,"stars":19,"repoUrl":20,"updatedAt":2185},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2317,2318,2319,2320],{"name":13,"slug":14,"type":15},{"name":2179,"slug":2180,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2183,"slug":2184,"type":15},{"slug":2187,"name":2187,"fn":2188,"description":2189,"org":2322,"tags":2323,"stars":19,"repoUrl":20,"updatedAt":2203},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2324,2325,2326,2327,2328],{"name":13,"slug":14,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2195,"slug":2196,"type":15},{"name":2198,"slug":2199,"type":15},{"name":2201,"slug":2202,"type":15},{"slug":2205,"name":2205,"fn":2206,"description":2207,"org":2330,"tags":2331,"stars":19,"repoUrl":20,"updatedAt":2217},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2332,2333,2334],{"name":2164,"slug":2165,"type":15},{"name":2212,"slug":2213,"type":15},{"name":2215,"slug":2216,"type":15},{"slug":2219,"name":2219,"fn":2220,"description":2221,"org":2336,"tags":2337,"stars":19,"repoUrl":20,"updatedAt":2237},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2338,2339,2340,2341,2342],{"name":13,"slug":14,"type":15},{"name":2226,"slug":2227,"type":15},{"name":2229,"slug":2230,"type":15},{"name":2232,"slug":2233,"type":15},{"name":2235,"slug":2236,"type":15},{"slug":2239,"name":2239,"fn":2240,"description":2241,"org":2344,"tags":2345,"stars":19,"repoUrl":20,"updatedAt":2247},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2346,2347,2348],{"name":2164,"slug":2165,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2183,"slug":2184,"type":15},{"slug":2249,"name":2249,"fn":2250,"description":2251,"org":2350,"tags":2351,"stars":19,"repoUrl":20,"updatedAt":2259},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[2352,2353,2354],{"name":2255,"slug":2256,"type":15},{"name":2167,"slug":2168,"type":15},{"name":2148,"slug":2149,"type":15},96]