[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill-dotnet-subscription-history":3,"mdc-pewnmi-key":33,"related-repo-dotnet-subscription-history":1365,"related-org-dotnet-subscription-history":1457},{"slug":4,"name":4,"fn":5,"description":6,"org":7,"tags":11,"stars":22,"repoUrl":23,"updatedAt":24,"license":25,"forks":26,"topics":27,"repo":28,"sourceUrl":31,"mdContent":32},"subscription-history","retrieve Maestro subscription history","Tell the history of a Maestro subscription using the darc CLI's get-subscription-history command. USE FOR: \"what happened the last times this subscription ran\", \"show the trigger history for a subscription\", \"why did this subscription fail\u002Fnot update\", \"did this subscription open a PR recently\", inspecting subscription trigger outcomes (Updated, NoUpdate, NotUpdatable, Failure, UserError, HasConflict, Rescheduled), filtering outcomes by build id, date range, outcome type or free-text repo\u002Fbranch search. DO NOT USE FOR: checking current subscription staleness\u002Fhealth (use flow-analysis or maestro-cli), tracing whether a commit reached a repo (use flow-tracing), CI build failures (use ci-analysis). INVOKES: shell (darc get-subscription-history).\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",[12,16,19],{"name":13,"slug":14,"type":15},".NET","net","tag",{"name":17,"slug":18,"type":15},"CLI","cli",{"name":20,"slug":21,"type":15},"Engineering","engineering",12,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Farcade-skills","2026-07-12T08:21:51.892007",null,18,[],{"repoUrl":23,"stars":22,"forks":26,"topics":29,"description":30},[],"Reuseable AI skills, plugins, agents for use in the dotnet product repos, such as dotnet\u002Fruntime","https:\u002F\u002Fgithub.com\u002Fdotnet\u002Farcade-skills\u002Ftree\u002FHEAD\u002Fplugins\u002Fdotnet-dnceng\u002Fskills\u002Fsubscription-history","---\nname: subscription-history\ndescription: >\n  Tell the history of a Maestro subscription using the darc CLI's\n  get-subscription-history command. USE FOR: \"what happened the last\n  times this subscription ran\", \"show the trigger history for a\n  subscription\", \"why did this subscription fail\u002Fnot update\", \"did this\n  subscription open a PR recently\", inspecting subscription trigger\n  outcomes (Updated, NoUpdate, NotUpdatable, Failure, UserError,\n  HasConflict, Rescheduled), filtering outcomes by build id, date range,\n  outcome type or free-text repo\u002Fbranch search. DO NOT USE FOR: checking\n  current subscription staleness\u002Fhealth (use flow-analysis or maestro-cli),\n  tracing whether a commit reached a repo (use flow-tracing), CI build\n  failures (use ci-analysis). INVOKES: shell (darc get-subscription-history).\nallowed-tools: shell\n---\n\n# Subscription History\n\nTell the history of a Maestro subscription — what happened each time it was\ntriggered — using `darc get-subscription-history`. Each result is a\n**subscription trigger outcome** recorded by Maestro describing what happened\nwhen a subscription ran (a PR was opened\u002Fupdated, there was nothing to update,\nthe update failed, etc.).\n\n## When to Use This Skill\n\nUse this skill when the user wants the **history** of a subscription's trigger\noutcomes — for example:\n\n- \"Show me the history of subscription `\u003Cguid>`\"\n- \"Why has this subscription been failing?\"\n- \"Did this subscription open a PR in the last week?\"\n- \"What were the last 5 outcomes for the core-sdk subscription?\"\n\nDo **not** use this skill for current staleness\u002Fhealth (use `flow-analysis` or\n`maestro-cli`), for tracing a commit across repos (use `flow-tracing`), or for\nCI build failures (use `ci-analysis`).\n\n## Inputs\n\n- **darc** installed and authenticated (see below).\n- One or more filters describing the subscription of interest. The most precise\n  filter is the subscription id (GUID). If the user gives a repo\u002Fbranch instead,\n  use `--search` or first resolve the id with `darc get-subscriptions`.\n\n## Prerequisites\n\n`darc` (Dependency ARcade) manages dependency flow in the .NET ecosystem.\n\n1. Install (or update) from any arcade-enabled repo by running the\n   `darc-init` script in `eng\u002Fcommon`:\n   ```powershell\n   .\\eng\\common\\darc-init.ps1   # Windows\n   ```\n   ```bash\n   .\u002Feng\u002Fcommon\u002Fdarc-init.sh    # macOS \u002F Linux\n   ```\n   This installs the version of darc the repo expects; re-run it to update an\n   out-of-date darc.\n2. Authenticate once: `darc authenticate` (caches Entra ID credentials under\n   `~\u002F.darc\u002F`). Required to read Maestro\u002FBAR data.\n\nVerify with `darc get-subscription-history --help`. If the command is not\nrecognized, the installed darc is too old — re-run `darc-init` to update it.\n\n## Workflow\n\n### Step 1: Identify the subscription\n\nThe most precise filter is the subscription id. If the user provided one, use\n`--id \u003Cguid>`. Otherwise, resolve it:\n\n```bash\n# Find the subscription id from the source\u002Ftarget repos\ndarc get-subscriptions --source-repo \u003Csource> --target-repo \u003Ctarget>\n```\n\nYou can also skip resolution and pass a `--search` term that is matched against\nthe subscription's source repo, target repo and target branch.\n\n### Step 2: Query the history\n\n```bash\n# Full history of one subscription (most recent first)\ndarc get-subscription-history --id \u003Csubscription-guid>\n\n# Narrow to failures only\ndarc get-subscription-history --id \u003Csubscription-guid> --type Failure\n\n# By repo\u002Fbranch free-text search instead of id\ndarc get-subscription-history --search core-sdk --limit 5\n\n# Outcomes produced by a specific build\ndarc get-subscription-history --build \u003Cbar-build-id>\n\n# Restrict to a date range (ISO 8601, treated as UTC)\ndarc get-subscription-history --id \u003Cguid> --after \"2025-01-01T00:00:00Z\" --before \"2025-02-01T00:00:00Z\"\n\n# Machine-readable output for scripting\u002Fjq\ndarc get-subscription-history --id \u003Cguid> --output-format json\n```\n\nAll filters can be combined.\n\n### Step 3: Interpret and report\n\nEach text outcome looks like:\n\n```\n2025-01-15 12:34:56Z  [Failure]  build 1234567\n  Subscription: https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fruntime ==> 'https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fdotnet' ('main')\n  Subscription Id: 510286a9-8cd5-47bd-a259-08d68641480a\n  PR: https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fdotnet\u002Fpull\u002F4242\n  Failed to update dependencies: \u003Cdetails>\n```\n\nSummarize for the user: the timeline of outcomes (newest first), how many of\neach `[Type]`, any recurring failures with their messages, and links to the PRs\nthat were opened. Outcome types:\n\n| Type | Meaning |\n|------|---------|\n| `Updated` | Dependencies were updated; a PR was opened or updated. |\n| `NoUpdate` | Nothing to update — already current. |\n| `NotUpdatable` | The subscription could not be updated (e.g. config issue). |\n| `Failure` | The update attempt failed. Read the message for the cause. |\n| `UserError` | Failure caused by user\u002Fconfig input. |\n| `HasConflict` | A merge conflict blocked the update. |\n| `Rescheduled` | The update was deferred and will retry. |\n\n## Options Reference\n\n| Option | Description |\n|--------|-------------|\n| `--id` | Filter by subscription id (GUID). |\n| `--build` | Filter by the BAR build id that triggered the outcome. |\n| `--type` | Filter by outcome type (`Updated`, `NoUpdate`, `NotUpdatable`, `Failure`, `UserError`, `HasConflict`, `Rescheduled`). |\n| `--search` | Free-text match against source repo, target repo and target branch. |\n| `--after` \u002F `--before` | Restrict to outcomes on\u002Fafter or on\u002Fbefore a date (e.g. `\"2025-01-15T12:00:00Z\"`). |\n| `--limit` | Max outcomes to return (1-1000, default 10). |\n| `--output-format` | `text` (default) or `json`. |\n\n## Validation\n\n- `darc get-subscription-history --help` lists the verb and options → darc is\n  current and authenticated.\n- A successful run prints one or more outcome blocks (text) or a JSON array.\n- \"No subscription trigger outcomes found matching the specified criteria.\"\n  means the filters matched nothing — broaden `--search`\u002Fdate range or confirm\n  the `--id` is correct via `darc get-subscriptions`.\n\n## Common Pitfalls\n\n- **GUID, not repo name, for `--id`.** A non-GUID value errors out. Use\n  `--search` for repo\u002Fbranch text matching.\n- **Dates are UTC, ISO 8601.** Use a form like `\"2025-01-15T12:00:00Z\"`.\n- **Default `--limit` is 10.** Increase it to see deeper history.\n- **Old darc.** If the verb is unknown, re-run `eng\u002Fcommon\u002Fdarc-init.ps1`\n  (or `.sh`) to update darc — the command was added recently.\n",{"data":34,"body":36},{"name":4,"description":6,"allowed-tools":35},"shell",{"type":37,"children":38},"root",[39,47,70,77,89,122,166,172,206,212,222,315,335,341,348,361,441,453,459,817,822,828,833,843,856,1003,1009,1219,1225,1268,1274,1359],{"type":40,"tag":41,"props":42,"children":43},"element","h1",{"id":4},[44],{"type":45,"value":46},"text","Subscription History",{"type":40,"tag":48,"props":49,"children":50},"p",{},[51,53,60,62,68],{"type":45,"value":52},"Tell the history of a Maestro subscription — what happened each time it was\ntriggered — using ",{"type":40,"tag":54,"props":55,"children":57},"code",{"className":56},[],[58],{"type":45,"value":59},"darc get-subscription-history",{"type":45,"value":61},". 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Use\n",{"type":40,"tag":54,"props":1294,"children":1296},{"className":1295},[],[1297],{"type":45,"value":195},{"type":45,"value":1299}," for repo\u002Fbranch text matching.",{"type":40,"tag":94,"props":1301,"children":1302},{},[1303,1308,1310,1315],{"type":40,"tag":63,"props":1304,"children":1305},{},[1306],{"type":45,"value":1307},"Dates are UTC, ISO 8601.",{"type":45,"value":1309}," Use a form like ",{"type":40,"tag":54,"props":1311,"children":1313},{"className":1312},[],[1314],{"type":45,"value":1171},{"type":45,"value":205},{"type":40,"tag":94,"props":1317,"children":1318},{},[1319,1331],{"type":40,"tag":63,"props":1320,"children":1321},{},[1322,1324,1329],{"type":45,"value":1323},"Default ",{"type":40,"tag":54,"props":1325,"children":1327},{"className":1326},[],[1328],{"type":45,"value":1184},{"type":45,"value":1330}," is 10.",{"type":45,"value":1332}," Increase it to see deeper history.",{"type":40,"tag":94,"props":1334,"children":1335},{},[1336,1341,1343,1349,1351,1357],{"type":40,"tag":63,"props":1337,"children":1338},{},[1339],{"type":45,"value":1340},"Old darc.",{"type":45,"value":1342}," If the verb is unknown, re-run ",{"type":40,"tag":54,"props":1344,"children":1346},{"className":1345},[],[1347],{"type":45,"value":1348},"eng\u002Fcommon\u002Fdarc-init.ps1",{"type":45,"value":1350},"\n(or ",{"type":40,"tag":54,"props":1352,"children":1354},{"className":1353},[],[1355],{"type":45,"value":1356},".sh",{"type":45,"value":1358},") to update darc — the command was added recently.",{"type":40,"tag":1360,"props":1361,"children":1362},"style",{},[1363],{"type":45,"value":1364},"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":1366,"total":22},[1367,1384,1395,1411,1424,1438,1447],{"slug":1368,"name":1368,"fn":1369,"description":1370,"org":1371,"tags":1372,"stars":22,"repoUrl":23,"updatedAt":1383},"binskim-analysis","investigate BinSkim SDL security findings","Investigate BinSkim SDL findings from official pipelines — understand Guardian filtering, compare raw vs merged SARIF, decode portal results, and determine fix ownership. Use when asked about SDL scan results, portal findings, Guardian filtering, rule meanings, or discrepancies between local and official results. Also use when asked \"why does the portal show X\", \"what's filtered\", \"explain Guardian\", \"investigate SDL findings\", \"portal BA2008\", \"binskim failures in pipeline\", or \"what rules are required\". DO NOT USE FOR: running BinSkim locally (use binskim-scan), source code analysis (use CodeQL), or credential scanning (use CredScan).\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1373,1374,1377,1380],{"name":13,"slug":14,"type":15},{"name":1375,"slug":1376,"type":15},"Audit","audit",{"name":1378,"slug":1379,"type":15},"Code Analysis","code-analysis",{"name":1381,"slug":1382,"type":15},"Security","security","2026-07-12T08:23:11.212231",{"slug":1385,"name":1385,"fn":1386,"description":1387,"org":1388,"tags":1389,"stars":22,"repoUrl":23,"updatedAt":1394},"binskim-scan","run BinSkim binary security analysis","Run BinSkim binary security analysis locally against a dotnet repository. Use when asked to scan binaries, check BinSkim compliance, verify a fix for a rule violation, or run a local SDL scan. Also use when asked \"run binskim\", \"binary security scan\", \"scan binaries\", \"check binskim\", \"verify my fix\", \"repro BA2008 locally\", or \"verify BA2008 fix\". DO NOT USE FOR: investigating official pipeline results or portal findings (use binskim-analysis), source code analysis (use CodeQL), credential scanning (use CredScan), or general build\u002Ftest failures (use ci-analysis).\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1390,1391,1392,1393],{"name":13,"slug":14,"type":15},{"name":17,"slug":18,"type":15},{"name":1378,"slug":1379,"type":15},{"name":1381,"slug":1382,"type":15},"2026-07-12T08:23:09.911458",{"slug":163,"name":163,"fn":1396,"description":1397,"org":1398,"tags":1399,"stars":22,"repoUrl":23,"updatedAt":1410},"analyze .NET CI build and test status","Analyze CI build and test status from Azure DevOps and Helix for dotnet repository PRs. Use when checking CI status, investigating failures, determining if a PR is ready to merge, or given URLs containing dev.azure.com or helix.dot.net. Also use when asked \"why is CI red\", \"test failures\", \"retry CI\", \"rerun tests\", \"is CI green\", \"build failed\", \"checks failing\", or \"flaky tests\". DO NOT USE FOR: investigating stale codeflow PRs or dependency update health, tracing whether a commit has flowed from one repo to another, reviewing code changes for correctness or style.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1400,1401,1404,1407],{"name":13,"slug":14,"type":15},{"name":1402,"slug":1403,"type":15},"Azure","azure",{"name":1405,"slug":1406,"type":15},"CI\u002FCD","ci-cd",{"name":1408,"slug":1409,"type":15},"Debugging","debugging","2026-07-12T08:21:49.360882",{"slug":1412,"name":1412,"fn":1413,"description":1414,"org":1415,"tags":1416,"stars":22,"repoUrl":23,"updatedAt":1423},"ci-crash-dump","debug CI crash dumps","Download and debug crash dumps from CI test failures in dotnet repositories. Use when a CI test crashed (not just failed), when the user wants to debug a crash dump from a PR or build, or when asked \"debug dump\", \"download dump\", \"crash dump from CI\", \"test crashed\", \"analyze crash in PR\", or \"why did the test crash\". DO NOT USE FOR: test failures that are not crashes (use ci-analysis), build failures, performance analysis, or analyzing dumps you already have locally.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1417,1418,1419,1420],{"name":13,"slug":14,"type":15},{"name":1405,"slug":1406,"type":15},{"name":1408,"slug":1409,"type":15},{"name":1421,"slug":1422,"type":15},"Testing","testing","2026-07-12T08:21:56.945844",{"slug":139,"name":139,"fn":1425,"description":1426,"org":1427,"tags":1428,"stars":22,"repoUrl":23,"updatedAt":1437},"analyze VMR codeflow health","Analyze VMR codeflow health using maestro MCP tools and GitHub MCP tools. USE FOR: investigating stale codeflow PRs, checking if fixes have flowed through the VMR pipeline, debugging dependency update issues, checking overall flow status for a repo, diagnosing why backflow PRs are missing or blocked, subscription health, build freshness, URLs containing dotnet-maestro or \"Source code updates from dotnet\u002Fdotnet\". DO NOT USE FOR: CI build failures (use ci-analysis skill), code review (use code-review skill), general PR investigation without codeflow context, tracing whether a specific commit\u002FPR has reached another repo (use flow-tracing skill). INVOKES: maestro and GitHub MCP tools, flow-health.cs script.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1429,1430,1431,1434],{"name":1405,"slug":1406,"type":15},{"name":20,"slug":21,"type":15},{"name":1432,"slug":1433,"type":15},"GitHub","github",{"name":1435,"slug":1436,"type":15},"MCP","mcp","2026-07-12T08:21:53.151866",{"slug":155,"name":155,"fn":1439,"description":1440,"org":1441,"tags":1442,"stars":22,"repoUrl":23,"updatedAt":1446},"trace .NET dependency flow in VMR","Trace dependency flow across .NET repos through the VMR pipeline. USE FOR: checking if a PR\u002Fcommit from repo A has reached repo B, finding what runtime SHA is in an SDK build, tracing dependency versions through the VMR, checking if a commit is included in an SDK build, decoding SDK version strings, \"has my fix reached runtime\", \"did roslyn#80873 flow to runtime\", \"what SHA is in SDK version X\", cross-repo dependency tracing, mapping SDK versions to VMR commits. DO NOT USE FOR: codeflow PR health or staleness (use flow-analysis skill), CI build failures (use ci-analysis skill). INVOKES: maestro and GitHub MCP tools, Get-SdkVersionTrace.ps1 script.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1443],{"name":1444,"slug":1445,"type":15},"Data Pipeline","data-pipeline","2026-07-12T08:21:55.689056",{"slug":1448,"name":1448,"fn":1449,"description":1450,"org":1451,"tags":1452,"stars":22,"repoUrl":23,"updatedAt":1456},"helix-investigation","investigate Helix test failures","Deep-dive investigation of Helix test failures starting from AzDO build legs. USE FOR: investigating recurring Helix test failures, downloading and analyzing Helix console logs, comparing passing vs failing runs, identifying machine-specific issues, XHarness timeout analysis, Android emulator DEVICE_NOT_FOUND errors, bulk failure aggregation across legs, \"why does this test fail on some machines\", \"top 5 failing tests in the last 2 days\", \"download helix logs for build X\", \"compare passing and failing helix runs\", \"what are the most common failures\". DO NOT USE FOR: high-level CI status checks (use ci-analysis), codeflow PRs (use flow-analysis). INVOKES: Helix and AzDO MCP tools, curl, gh CLI.\n",{"slug":8,"name":9,"logoUrl":10,"githubOrg":8},[1453,1454,1455],{"name":1408,"slug":1409,"type":15},{"name":20,"slug":21,"type":15},{"name":1421,"slug":1422,"type":15},"2026-07-12T08:21:46.445586",{"items":1458,"total":1617},[1459,1473,1486,1501,1519,1531,1551,1561,1573,1583,1596,1607],{"slug":1460,"name":1460,"fn":1461,"description":1462,"org":1463,"tags":1464,"stars":1470,"repoUrl":1471,"updatedAt":1472},"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},[1465,1466,1467],{"name":13,"slug":14,"type":15},{"name":20,"slug":21,"type":15},{"name":1468,"slug":1469,"type":15},"Performance","performance",5535,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fmsbuild","2026-07-22T05:37:33.965588",{"slug":1474,"name":1474,"fn":1475,"description":1476,"org":1477,"tags":1478,"stars":1483,"repoUrl":1484,"updatedAt":1485},"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},[1479,1480,1481,1482],{"name":13,"slug":14,"type":15},{"name":1378,"slug":1379,"type":15},{"name":1408,"slug":1409,"type":15},{"name":1468,"slug":1469,"type":15},4576,"https:\u002F\u002Fgithub.com\u002Fdotnet\u002Fskills","2026-07-12T08:23:25.400375",{"slug":1487,"name":1487,"fn":1488,"description":1489,"org":1490,"tags":1491,"stars":1483,"repoUrl":1484,"updatedAt":1500},"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},[1492,1493,1496,1497],{"name":13,"slug":14,"type":15},{"name":1494,"slug":1495,"type":15},"Android","android",{"name":1408,"slug":1409,"type":15},{"name":1498,"slug":1499,"type":15},"Microsoft","microsoft","2026-07-12T08:23:21.595572",{"slug":1502,"name":1502,"fn":1503,"description":1504,"org":1505,"tags":1506,"stars":1483,"repoUrl":1484,"updatedAt":1518},"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},[1507,1508,1509,1512,1515],{"name":13,"slug":14,"type":15},{"name":1408,"slug":1409,"type":15},{"name":1510,"slug":1511,"type":15},"iOS","ios",{"name":1513,"slug":1514,"type":15},"macOS","macos",{"name":1516,"slug":1517,"type":15},"Observability","observability","2026-07-12T08:23:20.369986",{"slug":1520,"name":1520,"fn":1521,"description":1522,"org":1523,"tags":1524,"stars":1483,"repoUrl":1484,"updatedAt":1530},"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},[1525,1526,1529],{"name":1378,"slug":1379,"type":15},{"name":1527,"slug":1528,"type":15},"QA","qa",{"name":1421,"slug":1422,"type":15},"2026-07-12T08:23:51.277743",{"slug":1532,"name":1532,"fn":1533,"description":1534,"org":1535,"tags":1536,"stars":1483,"repoUrl":1484,"updatedAt":1550},"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},[1537,1538,1541,1544,1547],{"name":13,"slug":14,"type":15},{"name":1539,"slug":1540,"type":15},"Blazor","blazor",{"name":1542,"slug":1543,"type":15},"C#","csharp",{"name":1545,"slug":1546,"type":15},"UI Components","ui-components",{"name":1548,"slug":1549,"type":15},"Web Development","web-development","2026-07-15T06:03:29.216359",{"slug":1552,"name":1552,"fn":1553,"description":1554,"org":1555,"tags":1556,"stars":1483,"repoUrl":1484,"updatedAt":1560},"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},[1557,1558,1559],{"name":1378,"slug":1379,"type":15},{"name":1408,"slug":1409,"type":15},{"name":1498,"slug":1499,"type":15},"2026-07-12T08:21:34.637923",{"slug":1562,"name":1562,"fn":1563,"description":1564,"org":1565,"tags":1566,"stars":1483,"repoUrl":1484,"updatedAt":1572},"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},[1567,1570,1571],{"name":1568,"slug":1569,"type":15},"Build","build",{"name":1408,"slug":1409,"type":15},{"name":20,"slug":21,"type":15},"2026-07-19T05:38:19.340791",{"slug":1574,"name":1574,"fn":1575,"description":1576,"org":1577,"tags":1578,"stars":1483,"repoUrl":1484,"updatedAt":1582},"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},[1579,1580,1581],{"name":13,"slug":14,"type":15},{"name":20,"slug":21,"type":15},{"name":1468,"slug":1469,"type":15},"2026-07-19T05:38:18.364937",{"slug":1584,"name":1584,"fn":1585,"description":1586,"org":1587,"tags":1588,"stars":1483,"repoUrl":1484,"updatedAt":1595},"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},[1589,1590,1593,1594],{"name":20,"slug":21,"type":15},{"name":1591,"slug":1592,"type":15},"Monitoring","monitoring",{"name":1468,"slug":1469,"type":15},{"name":1421,"slug":1422,"type":15},"2026-07-12T08:21:35.865649",{"slug":1597,"name":1597,"fn":1598,"description":1599,"org":1600,"tags":1601,"stars":1483,"repoUrl":1484,"updatedAt":1606},"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},[1602,1603,1604,1605],{"name":13,"slug":14,"type":15},{"name":1408,"slug":1409,"type":15},{"name":20,"slug":21,"type":15},{"name":1468,"slug":1469,"type":15},"2026-07-12T08:21:40.961722",{"slug":1608,"name":1608,"fn":1609,"description":1610,"org":1611,"tags":1612,"stars":1483,"repoUrl":1484,"updatedAt":1616},"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},[1613,1614,1615],{"name":1408,"slug":1409,"type":15},{"name":20,"slug":21,"type":15},{"name":1527,"slug":1528,"type":15},"2026-07-19T05:38:14.336279",144]