Generate the code from typespec for C#. Parameter: C# SDK repository root location <cs_root>.

Generate a test given sample. Parameters: <cs_root> C# SDK repository root; <package_name> Package name: one of Azure.AI.Projects, Azure.AI.Projects.Agents or Azure.AI.Extensions.OpenAI; <sample_name> the sample to use as a starting point for the test.

Converts dates between formats and handles timezone differences

Validates that a proposed trip fits within the user's stated budget

**WORKFLOW SKILL** — Prepares Azure.ResourceManager SDK refresh pull requests in azure-sdk-for-net. WHEN: "prepare sdk refresh", "refresh Azure.ResourceManager package", "update ARM SDK from autorest tag", "refresh changelog dependencies". INVOKES: git and GitHub pull request tools for branch, commit, push, and PR creation. FOR SINGLE OPERATIONS: Use git or GitHub tools directly.

Generate new Azure.Provisioning.* libraries OR regenerate existing ones. Use when introducing a brand-new provisioning library, adding new resource types, enum values, or API versions.

Pre-commit validation checks for azure-sdk-for-net. Use this before committing or pushing changes to SDK packages. Runs dotnet format, exports public API listings, updates snippets, and regenerates code as needed.

Query and modify CODEOWNERS ownership, service labels, and package associations in Azure SDK repositories. **UTILITY SKILL**. FOR SINGLE OPERATIONS: view, add, or remove owners and labels. WHEN: "code owners", "view codeowners", "add package owner", "remove package owner", "add label", "remove label", "codeowners blocked PR", "who owns this package", "create service label", "update codeowners cache", "unblock release". INVOKES: azsdk_engsys_codeowner_view, azsdk_engsys_codeowner_add_package_owner, azsdk_engsys_codeowner_add_label_owner, azsdk_check_service_label, azsdk_create_service_label, azsdk_engsys_codeowner_update_cache, azsdk_engsys_codeowner_check_package.

Resolve review comments on Azure management-plane .NET SDK PRs. Handles renaming types/properties, changing property types, and other API surface adjustments by updating TypeSpec client.tsp and regenerating.

**UTILITY SKILL** — Must be consulted before making any changes to packages under sdk/. Discovers and loads package-specific domain knowledge that prevents common mistakes. WHEN: add feature to package; fix bug in package; modify package code; regenerate from typespec; change client library.

Migration logic for Azure SDK for .NET data-plane libraries migrating from AutoRest/Swagger to TypeSpec-based generation. Uses MCP tools from the generator-agent server for automated deterministic fixes.

Guidance for writing and reviewing SIMD / hardware-intrinsics code in dotnet/runtime. USE FOR: vectorizing a scalar algorithm, writing or reviewing code that uses Vector128/Vector256/Vector512, Vector<T>, or the platform intrinsics in System.Runtime.Intrinsics.X86/Arm/Wasm, and validating remainder handling, load/store safety, and hardware-acceleration fallbacks. DO NOT USE FOR: general performance work unrelated to SIMD (use performance-benchmark), or non-vectorized code review (use code-review).

Update OS version references in Helix queue definitions to add new versions, replace EOL versions, or audit coverage against the supported-os matrix. USE FOR: adding new OS versions to Helix queues, replacing EOL OS versions, upgrading "oldest" or "latest" version references, auditing Helix coverage. DO NOT USE FOR: creating new container images (that's dotnet-buildtools-prereqs-docker), updating supported-os.json (that's the update-supported-os skill in dotnet/core).

Guidance for writing and modifying System.Net networking code in dotnet/runtime. Covers resource lifecycle, connection pooling, cross-platform interop, protocol compliance, async patterns, and security posture. For full code review, delegates to the @system-net-review agent. Trigger words: system.net, networking, http client, sockets, ssl, tls, quic, http2, http3, socketshttphandler, sslstream, connection pool.

Analyze a dotnet/runtime PR's CI failures, skip failures already known to Build Analysis, find matching Known Build Errors, and create or draft new KBEs for the remaining failures. Supports dry-run output to local markdown files instead of creating GitHub issues.

Generate and run ad hoc performance benchmarks to validate code changes. Use this when asked to benchmark, profile, or validate the performance impact of a code change in dotnet/runtime.

Domain knowledge for triaging and fixing .NET failures on Apple mobile (iOS, tvOS, MacCatalyst) and Android. Use when runtime-extra-platforms or mobile CI is failing, when investigating iOS, tvOS, MacCatalyst, iossimulator, tvossimulator, or Android build/test failures, or when a change touches mobile pipeline YAML, AppleAppBuilder/AndroidAppBuilder, code signing, provisioning, simulator/emulator startup, platform conditionals, or NativeAOT-on-mobile behavior. Covers failure triage (infrastructure vs code), CI pipeline structure, platform-specific code paths, and NativeAOT compilation on mobile.

Triage a dotnet/runtime GitHub issue with duplicate search, label check, reproduction, and ecosystem research, then recommend KEEP/CLOSE/NEEDS INFO. Use when asked to triage, evaluate, assess, or check a specific GitHub issue. Also use when asked "is this a duplicate", "should we close this", "check this issue", "what do you think about this issue", or when given a dotnet/runtime issue URL or number and asked for an opinion. Handles bug reports, API proposals, enhancements, performance regressions, and questions.

Triage Fuzzlyn CI runs.

Guidance for writing and modifying Microsoft.Extensions.* and System.IO.Compression code in dotnet/runtime. Covers DI lifetime management, configuration binding, options validation, logging provider patterns, caching semantics, compression format compliance, and host lifecycle. For full code review, delegates to the @extensions-reviewer agent. Trigger words: Microsoft.Extensions, IServiceCollection, IConfiguration, ILogger, IHost, IMemoryCache, IOptions, ZipArchive, HttpClientFactory, IFileProvider, IChangeToken.