[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill-dotnet-apple-crash-symbolication":3,"mdc--z1fo4v-key":40,"related-repo-dotnet-apple-crash-symbolication":1713,"related-org-dotnet-apple-crash-symbolication":1812},{"slug":4,"name":4,"fn":5,"description":6,"org":7,"tags":11,"stars":28,"repoUrl":29,"updatedAt":30,"license":31,"forks":32,"topics":33,"repo":35,"sourceUrl":38,"mdContent":39},"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},"dotnet",".NET (Microsoft)","https:\u002F\u002Fpexgzepcugksgbtrxkhf.supabase.co\u002Fstorage\u002Fv1\u002Fobject\u002Fpublic\u002Forg-logos\u002Fdotnet.png",[12,16,19,22,25],{"name":13,"slug":14,"type":15},"Observability","observability","tag",{"name":17,"slug":18,"type":15},"iOS","ios",{"name":20,"slug":21,"type":15},".NET","net",{"name":23,"slug":24,"type":15},"macOS","macos",{"name":26,"slug":27,"type":15},"Debugging","debugging",4576,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fskills","2026-07-12T08:23:20.369986","MIT",332,[34],"agent-skills",{"repoUrl":29,"stars":28,"forks":32,"topics":36,"description":37},[34],"Repository for skills to assist AI coding agents with .NET and C#","https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fskills\u002Ftree\u002FHEAD\u002Fplugins\u002Fdotnet-diag\u002Fskills\u002Fapple-crash-symbolication","---\nname: apple-crash-symbolication\ndescription: 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.\nlicense: MIT\n---\n\n# Apple Platform Crash Log .NET Symbolication\n\nResolves native backtrace frames from .NET MAUI and Mono app crashes on Apple platforms (iOS, tvOS, Mac Catalyst, macOS) to function names, source files, and line numbers using Mach-O UUIDs and dSYM debug symbol bundles.\n\n**Inputs:** Crash log file (`.ips` JSON format, iOS 15+ \u002F macOS 12+), `atos` (from Xcode), optionally a connected iOS device to pull crash logs from.\n\n**Do not use when:** The crashing library is not a .NET component (e.g., pure Swift\u002FUIKit), or the crash log is an Android tombstone.\n\n---\n\n## Workflow\n\n### Step 1: Parse the .ips Crash Log\n\n**Format check:** Before proceeding, verify the file is `.ips` JSON format. The first line must be valid JSON. If the file is plain text (e.g., Android tombstone with `#NN pc` frame lines, or legacy Apple `.crash` text format), **stop immediately** — this workflow does not apply. Report the format mismatch to the user and do not attempt any symbolication.\n\nThe `.ips` file is **two-part JSON**: line 1 is a metadata header; the remaining lines are a separate JSON crash body. Parse them separately:\n\n```python\nlines = open('crash.ips').readlines()\nmetadata = json.loads(lines[0])           # app_name, bundleID, os_version, slice_uuid\ncrash    = json.loads(''.join(lines[1:])) # Full crash report\n```\n\nKey fields in the crash body:\n- `usedImages[N]` has `name`, `base` (load address), `uuid`, `arch` for each loaded binary\n- `threads[N].frames[M]` has `imageOffset`, `imageIndex`; frame address = `usedImages[imageIndex].base + imageOffset`\n- `exception.type`, `exception.signal` (e.g., `EXC_CRASH` \u002F `SIGABRT`)\n- `asi` (Application Specific Information) often contains the managed exception message\n- `lastExceptionBacktrace` has frames from the exception that triggered the crash\n- `faultingThread` is the index into the `threads` array\n\n**Parsing gotcha:** Some .ips files have case-conflicting duplicate keys (`vmRegionInfo` \u002F `vmregioninfo`). Pre-process the raw JSON to rename the lowercase duplicate before parsing. The `asi` field may be absent.\n\n### Step 2: Identify .NET Runtime Libraries\n\nFilter `usedImages` to .NET runtime libraries:\n\n| Library | Runtime |\n|---------|---------|\n| `libcoreclr` | CoreCLR runtime |\n| `libmonosgen-2.0` | Mono runtime |\n| `libSystem.Native` | .NET BCL native component |\n| `libSystem.Globalization.Native` | .NET BCL globalization |\n| `libSystem.Security.Cryptography.Native.Apple` | .NET BCL crypto |\n| `libSystem.IO.Compression.Native` | .NET BCL compression |\n| `libSystem.Net.Security.Native` | .NET BCL net security |\n\nOn Apple platforms these ship as `.framework` bundles, so image names may omit `.dylib`. Match using substring (e.g., `libcoreclr` not `libcoreclr.dylib`). The app binary may appear **twice** in `usedImages` with different UUIDs.\n\n**Key bridge functions** in the app binary: `xamarin_process_managed_exception` (managed exception bridged to ObjC NSException), `xamarin_main`, `mono_jit_exec`, `coreclr_execute_assembly`.\n\n**NativeAOT:** Runtime is statically linked into the app binary. `libSystem.*` BCL libraries remain separate. The app binary needs its own dSYM from the build output.\n\nSkip `libsystem_kernel.dylib`, `UIKitCore`, and other Apple system frameworks unless specifically asked.\n\n### Step 3: Interpret the Crash\n\n**Start with `asi`** (Application Specific Information) — for .NET crashes, it often contains the managed exception type and message (e.g., `XamlParseException`, `NullReferenceException`). The root cause may already be visible here.\n\nThen examine the **faulting thread** (`threads[faultingThread]`). Explain what frames #0 and #1 mean before examining other threads. Cross-thread context (GC state, thread pool) is useful for validation but not evidence of causation.\n\nAlso check `lastExceptionBacktrace` for the managed exception path through bridge functions like `xamarin_process_managed_exception`.\n\nSometimes the .NET runtime version is visible in image paths in `usedImages`, particularly on macOS when using shared-framework installs or NuGet-pack-style layouts (e.g., `...\u002FMicrosoft.NETCore.App\u002F10.0.4\u002Flibcoreclr.dylib`). On iOS, however, image paths are typically inside the app bundle (for example, `...\u002FFrameworks\u002Flibcoreclr.framework\u002Flibcoreclr`) and do not embed the runtime version, so you usually need to infer it via the Mach-O UUID by matching against SDK packs or symbol-server downloads rather than relying on the path alone.\n\n### Step 4: Locate dSYMs\n\nFor each .NET library needing symbolication, locate a UUID-matched dSYM:\n\n1. **Microsoft symbol server** (automatic): Download `.dwarf` via `https:\u002F\u002Fmsdl.microsoft.com\u002Fdownload\u002Fsymbols\u002F_.dwarf\u002Fmach-uuid-sym-{UUID}\u002F_.dwarf` (UUID lowercase, no dashes). Convert to `.dSYM` bundle (use the image name from `usedImages[].name`, e.g., `libcoreclr`):\n   ```bash\n   mkdir -p libcoreclr.dSYM\u002FContents\u002FResources\u002FDWARF\n   cp _.dwarf libcoreclr.dSYM\u002FContents\u002FResources\u002FDWARF\u002Flibcoreclr\n   ```\n2. **Build output**: `bin\u002FDebug\u002Fnet*-ios\u002Fios-arm64\u002F\u003CApp>.app.dSYM\u002F`\n3. **SDK packs**: `$DOTNET_ROOT\u002Fpacks\u002FMicrosoft.NETCore.App.Runtime.\u003Crid>\u002F\u003Cversion>\u002Fruntimes\u002F\u003Crid>\u002Fnative\u002F`\n4. **NuGet cache**: `~\u002F.nuget\u002Fpackages\u002Fmicrosoft.netcore.app.runtime.\u003Crid>\u002F\u003Cversion>\u002Fruntimes\u002F\u003Crid>\u002Fnative\u002F`\n5. **`dotnet-symbol`**: `dotnet-symbol --symbols -o symbols-out \u003Cpath-to-binary.dylib>`\n\nAlways verify: `dwarfdump --uuid \u003Cdsym>` must match the UUID from the crash log exactly.\n\n### Step 5: Symbolicate with atos\n\n```bash\natos -arch arm64 -o \u003Cpath.dSYM\u002FContents\u002FResources\u002FDWARF\u002Fbinary_name> -l \u003Cload_address> \u003Cframe_addresses...>\n```\n\n- `-o` points to the DWARF binary **inside** the `.dSYM` bundle (`Contents\u002FResources\u002FDWARF\u002F`), not the bundle itself\n- `-l` is the load address from `usedImages[N].base`\n- Use the `arch` from `usedImages[N].arch` (usually `arm64`, may be `arm64e`)\n- Pass multiple addresses per invocation for batch symbolication\n\n```bash\n# Example: symbolicate libcoreclr frames\natos -arch arm64 -o libcoreclr.dSYM\u002FContents\u002FResources\u002FDWARF\u002Flibcoreclr -l 0x104000000 0x104522098 0x1043c0014\n```\n\nStrip the `\u002F__w\u002F1\u002Fs\u002F` CI workspace prefix from output — meaningful paths start at `src\u002Fruntime\u002F`, mapping to the [dotnet\u002Fdotnet](https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fdotnet) VMR.\n\n### Automation Script\n\n[scripts\u002FSymbolicate-Crash.ps1](scripts\u002FSymbolicate-Crash.ps1) automates the full workflow (parsing, dSYM lookup, symbol download, and symbolication). Resolve the path relative to this SKILL.md file.\n\n```powershell\n# $SKILL_DIR is the directory containing this SKILL.md\npwsh \"$SKILL_DIR\u002Fscripts\u002FSymbolicate-Crash.ps1\" -CrashFile MyApp-2026-02-25.ips\n```\n\nStart with `-ParseOnly` for a fast overview without requiring `atos`. The script automatically downloads symbols from the Microsoft symbol server when local dSYMs are missing.\n\nFlags: `-CrashingThreadOnly`, `-OutputFile path`, `-ParseOnly`, `-SkipVersionLookup`, `-SkipSymbolDownload`, `-SymbolCacheDir path`, `-DsymSearchPaths path1,path2`.\n\n---\n\n## Retrieving Crash Logs\n\nPull crash logs from a connected iOS device using `idevicecrashreport` (from [libimobiledevice](https:\u002F\u002Flibimobiledevice.org\u002F)):\n\n```bash\nidevicecrashreport -e \u002Ftmp\u002Fcrashlogs\u002F\nfind \u002Ftmp\u002Fcrashlogs\u002F -iname '*MyApp*' -name '*.ips'\n```\n\nAlso available in **Xcode > Window > Devices and Simulators > View Device Logs**, or at `~\u002FLibrary\u002FLogs\u002FCrashReporter\u002F` (Mac Catalyst), `~\u002FLibrary\u002FLogs\u002FDiagnosticReports\u002F` (macOS).\n\n---\n\n## Validation\n\n1. `dwarfdump --uuid \u003Cdsym>` matches UUID from the crash log\n2. At least one .NET frame resolves to a function name (not a raw address)\n3. Resolved paths contain recognizable .NET runtime structure (e.g., `src\u002Fcoreclr\u002F`, `mono\u002Fmetadata\u002F`, `mono\u002Fmini\u002F`)\n\n## Stop Signals\n\n- **Wrong file format**: If the file is not `.ips` JSON (e.g., Android tombstone with `#NN pc` stack frames, legacy `.crash` text format), **stop immediately** — report the format mismatch to the user and do not proceed with any symbolication. Do not attempt to symbolicate using other tools or workflows.\n- **No .NET frames found**: Report parsed frames and stop.\n- **All frames resolved**: Present symbolicated backtrace with brief crash analysis (faulting thread, exception type, likely area). If the user asks for deeper investigation, proceed.\n- **dSYM not available \u002F UUID mismatch**: Report unsymbolicated frames with UUIDs and addresses. Suggest locating the original build artifacts.\n- **atos not available**: Present the manual `atos` commands for the user to run. Do not install Xcode. `atos` ships with Xcode Command Line Tools (`xcode-select --install`).\n\n## References\n\n- **IPS format details**: See [references\u002Fips-crash-format.md](references\u002Fips-crash-format.md) for additional .ips parsing details and macOS symbol package differences.\n",{"data":41,"body":42},{"name":4,"description":6,"license":31},{"type":43,"children":44},"root",[45,54,60,88,98,102,109,116,156,175,215,220,373,405,411,424,571,621,661,679,699,705,735,755,773,801,807,812,977,990,996,1088,1181,1241,1273,1279,1289,1314,1333,1386,1389,1395,1417,1493,1521,1524,1530,1574,1580,1681,1687,1707],{"type":46,"tag":47,"props":48,"children":50},"element","h1",{"id":49},"apple-platform-crash-log-net-symbolication",[51],{"type":52,"value":53},"text","Apple Platform Crash Log .NET Symbolication",{"type":46,"tag":55,"props":56,"children":57},"p",{},[58],{"type":52,"value":59},"Resolves native backtrace frames from .NET MAUI and Mono app crashes on Apple platforms (iOS, tvOS, Mac Catalyst, macOS) to function names, source files, and line numbers using Mach-O UUIDs and dSYM debug symbol bundles.",{"type":46,"tag":55,"props":61,"children":62},{},[63,69,71,78,80,86],{"type":46,"tag":64,"props":65,"children":66},"strong",{},[67],{"type":52,"value":68},"Inputs:",{"type":52,"value":70}," Crash log file (",{"type":46,"tag":72,"props":73,"children":75},"code",{"className":74},[],[76],{"type":52,"value":77},".ips",{"type":52,"value":79}," JSON format, iOS 15+ \u002F macOS 12+), ",{"type":46,"tag":72,"props":81,"children":83},{"className":82},[],[84],{"type":52,"value":85},"atos",{"type":52,"value":87}," (from Xcode), optionally a connected iOS device to pull crash logs from.",{"type":46,"tag":55,"props":89,"children":90},{},[91,96],{"type":46,"tag":64,"props":92,"children":93},{},[94],{"type":52,"value":95},"Do not use when:",{"type":52,"value":97}," The crashing library is not a .NET component (e.g., pure Swift\u002FUIKit), or the crash log is an Android tombstone.",{"type":46,"tag":99,"props":100,"children":101},"hr",{},[],{"type":46,"tag":103,"props":104,"children":106},"h2",{"id":105},"workflow",[107],{"type":52,"value":108},"Workflow",{"type":46,"tag":110,"props":111,"children":113},"h3",{"id":112},"step-1-parse-the-ips-crash-log",[114],{"type":52,"value":115},"Step 1: Parse the .ips Crash Log",{"type":46,"tag":55,"props":117,"children":118},{},[119,124,126,131,133,139,141,147,149,154],{"type":46,"tag":64,"props":120,"children":121},{},[122],{"type":52,"value":123},"Format check:",{"type":52,"value":125}," Before proceeding, verify the file is ",{"type":46,"tag":72,"props":127,"children":129},{"className":128},[],[130],{"type":52,"value":77},{"type":52,"value":132}," JSON format. The first line must be valid JSON. If the file is plain text (e.g., Android tombstone with ",{"type":46,"tag":72,"props":134,"children":136},{"className":135},[],[137],{"type":52,"value":138},"#NN pc",{"type":52,"value":140}," frame lines, or legacy Apple ",{"type":46,"tag":72,"props":142,"children":144},{"className":143},[],[145],{"type":52,"value":146},".crash",{"type":52,"value":148}," text format), ",{"type":46,"tag":64,"props":150,"children":151},{},[152],{"type":52,"value":153},"stop immediately",{"type":52,"value":155}," — this workflow does not apply. Report the format mismatch to the user and do not attempt any symbolication.",{"type":46,"tag":55,"props":157,"children":158},{},[159,161,166,168,173],{"type":52,"value":160},"The ",{"type":46,"tag":72,"props":162,"children":164},{"className":163},[],[165],{"type":52,"value":77},{"type":52,"value":167}," file is ",{"type":46,"tag":64,"props":169,"children":170},{},[171],{"type":52,"value":172},"two-part JSON",{"type":52,"value":174},": line 1 is a metadata header; the remaining lines are a separate JSON crash body. 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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},[1759,1760,1763],{"name":1723,"slug":1724,"type":15},{"name":1761,"slug":1762,"type":15},"QA","qa",{"name":1764,"slug":1765,"type":15},"Testing","testing","2026-07-12T08:23:51.277743",{"slug":1768,"name":1768,"fn":1769,"description":1770,"org":1771,"tags":1772,"stars":28,"repoUrl":29,"updatedAt":1786},"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},[1773,1774,1777,1780,1783],{"name":20,"slug":21,"type":15},{"name":1775,"slug":1776,"type":15},"Blazor","blazor",{"name":1778,"slug":1779,"type":15},"C#","csharp",{"name":1781,"slug":1782,"type":15},"UI Components","ui-components",{"name":1784,"slug":1785,"type":15},"Web Development","web-development","2026-07-15T06:03:29.216359",{"slug":1788,"name":1788,"fn":1789,"description":1790,"org":1791,"tags":1792,"stars":28,"repoUrl":29,"updatedAt":1796},"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},[1793,1794,1795],{"name":1723,"slug":1724,"type":15},{"name":26,"slug":27,"type":15},{"name":1742,"slug":1743,"type":15},"2026-07-12T08:21:34.637923",{"slug":1798,"name":1798,"fn":1799,"description":1800,"org":1801,"tags":1802,"stars":28,"repoUrl":29,"updatedAt":1810},"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},[1803,1806,1807],{"name":1804,"slug":1805,"type":15},"Build","build",{"name":26,"slug":27,"type":15},{"name":1808,"slug":1809,"type":15},"Engineering","engineering","2026-07-19T05:38:19.340791",96,{"items":1813,"total":1918},[1814,1826,1833,1840,1848,1854,1862,1868,1874,1884,1897,1908],{"slug":1815,"name":1815,"fn":1816,"description":1817,"org":1818,"tags":1819,"stars":1823,"repoUrl":1824,"updatedAt":1825},"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},[1820,1821,1822],{"name":20,"slug":21,"type":15},{"name":1808,"slug":1809,"type":15},{"name":1727,"slug":1728,"type":15},5535,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fmsbuild","2026-07-22T05:37:33.965588",{"slug":1716,"name":1716,"fn":1717,"description":1718,"org":1827,"tags":1828,"stars":28,"repoUrl":29,"updatedAt":1729},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1829,1830,1831,1832],{"name":20,"slug":21,"type":15},{"name":1723,"slug":1724,"type":15},{"name":26,"slug":27,"type":15},{"name":1727,"slug":1728,"type":15},{"slug":1731,"name":1731,"fn":1732,"description":1733,"org":1834,"tags":1835,"stars":28,"repoUrl":29,"updatedAt":1744},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1836,1837,1838,1839],{"name":20,"slug":21,"type":15},{"name":1738,"slug":1739,"type":15},{"name":26,"slug":27,"type":15},{"name":1742,"slug":1743,"type":15},{"slug":4,"name":4,"fn":5,"description":6,"org":1841,"tags":1842,"stars":28,"repoUrl":29,"updatedAt":30},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1843,1844,1845,1846,1847],{"name":20,"slug":21,"type":15},{"name":26,"slug":27,"type":15},{"name":17,"slug":18,"type":15},{"name":23,"slug":24,"type":15},{"name":13,"slug":14,"type":15},{"slug":1754,"name":1754,"fn":1755,"description":1756,"org":1849,"tags":1850,"stars":28,"repoUrl":29,"updatedAt":1766},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1851,1852,1853],{"name":1723,"slug":1724,"type":15},{"name":1761,"slug":1762,"type":15},{"name":1764,"slug":1765,"type":15},{"slug":1768,"name":1768,"fn":1769,"description":1770,"org":1855,"tags":1856,"stars":28,"repoUrl":29,"updatedAt":1786},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1857,1858,1859,1860,1861],{"name":20,"slug":21,"type":15},{"name":1775,"slug":1776,"type":15},{"name":1778,"slug":1779,"type":15},{"name":1781,"slug":1782,"type":15},{"name":1784,"slug":1785,"type":15},{"slug":1788,"name":1788,"fn":1789,"description":1790,"org":1863,"tags":1864,"stars":28,"repoUrl":29,"updatedAt":1796},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1865,1866,1867],{"name":1723,"slug":1724,"type":15},{"name":26,"slug":27,"type":15},{"name":1742,"slug":1743,"type":15},{"slug":1798,"name":1798,"fn":1799,"description":1800,"org":1869,"tags":1870,"stars":28,"repoUrl":29,"updatedAt":1810},{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1871,1872,1873],{"name":1804,"slug":1805,"type":15},{"name":26,"slug":27,"type":15},{"name":1808,"slug":1809,"type":15},{"slug":1875,"name":1875,"fn":1876,"description":1877,"org":1878,"tags":1879,"stars":28,"repoUrl":29,"updatedAt":1883},"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},[1880,1881,1882],{"name":20,"slug":21,"type":15},{"name":1808,"slug":1809,"type":15},{"name":1727,"slug":1728,"type":15},"2026-07-19T05:38:18.364937",{"slug":1885,"name":1885,"fn":1886,"description":1887,"org":1888,"tags":1889,"stars":28,"repoUrl":29,"updatedAt":1896},"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},[1890,1891,1894,1895],{"name":1808,"slug":1809,"type":15},{"name":1892,"slug":1893,"type":15},"Monitoring","monitoring",{"name":1727,"slug":1728,"type":15},{"name":1764,"slug":1765,"type":15},"2026-07-12T08:21:35.865649",{"slug":1898,"name":1898,"fn":1899,"description":1900,"org":1901,"tags":1902,"stars":28,"repoUrl":29,"updatedAt":1907},"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},[1903,1904,1905,1906],{"name":20,"slug":21,"type":15},{"name":26,"slug":27,"type":15},{"name":1808,"slug":1809,"type":15},{"name":1727,"slug":1728,"type":15},"2026-07-12T08:21:40.961722",{"slug":1909,"name":1909,"fn":1910,"description":1911,"org":1912,"tags":1913,"stars":28,"repoUrl":29,"updatedAt":1917},"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},[1914,1915,1916],{"name":26,"slug":27,"type":15},{"name":1808,"slug":1809,"type":15},{"name":1761,"slug":1762,"type":15},"2026-07-19T05:38:14.336279",144]