Browse reusable Agent Skills, each with a clear purpose and practical guidance.
Migrate @data-client codebases to v0.18 delegate signatures. Drives the v0.18 codemod and then handles the cases it cannot — especially registering argsKey for schemas whose output depends on endpoint args. Use when upgrading to v0.18, seeing TS errors about unvisit/visit/args/delegate signatures, or adapting custom Schema implementations.
Setup, install, and onboard new developers to Reactive Data Client monorepo - nvm, yarn, build, test, getting started guide
Migrate @data-client/rest path strings from path-to-regexp v6 to v8 syntax. Use when upgrading path-to-regexp, updating RestEndpoint.path or resource path strings, or when seeing errors about unexpected ?, +, (, or ) in paths.
Create beautiful, responsive HTML emails using React components with React Email. Build transactional emails with modern components, support internationalization, and integrate with email service providers like Resend. Use when creating welcome emails, password resets, notifications, order confirmations, or any HTML email templates.
Use when weighing whether to extract a shared abstraction, base class, interface, or generic helper versus keeping code duplicated; evaluating DRY tradeoffs across parallel Sonarr and Radarr implementations, Refit or other code-generated API clients, OpenAPI/gRPC/GraphQL DTOs, or anti-corruption layers over distinct external systems; reviewing a PR that introduces a new shared abstraction spanning independent bounded contexts; considering unwinding a wrong abstraction back into duplicated copies. Triggers on phrases like "should I abstract this", "extract a base class", "these look duplicated", "DRY this up", "unify Sonarr and Radarr", "refactor to share", "rule of three", "wrong abstraction". Do NOT use for mechanical refactors within a single type or for trivial helper extraction inside one module.
Use when writing, editing, or reviewing Mapperly (`Riok.Mapperly`) mapper classes; adding or changing a `[Mapper]`-attributed partial class; configuring `RequiredMappingStrategy`, `[MapProperty]`, `[MapperIgnore]`, or other Mapperly attributes; mapping between nullable Refit/OpenAPI DTOs and non-nullable domain records; debugging null-handling in generated mapping code (positional records, `required init`, initializer defaults); investigating Mapperly diagnostics such as RMG001, RMG020, or RMG089; inspecting source-generated output under `obj/Debug/*/generated/Riok.Mapperly/`. Triggers on phrases like "add a Mapperly mapper", "Mapperly null handling", "DTO to domain mapping", "generated mapper", or edits to files ending in `*Mapper.cs` under `ServarrApi/`. Do NOT use for hand-written mapping code or AutoMapper.
Use when writing, editing, or reviewing ASP.NET Core Minimal API endpoints, route handlers, route groups, endpoint filters, or API responses; configuring OpenAPI document generation or build-time spec export; implementing endpoint validation or problem details error handling; using Server-Sent Events for streaming; writing integration tests against API endpoints; embedding Kestrel in a CLI tool. Triggers on phrases like "add an endpoint", "minimal API", "route group", "endpoint filter", "typed results", "OpenAPI spec", "Kestrel server", "API endpoint", "HTTP server endpoints". Do NOT use for MVC controllers, Razor Pages, Blazor Server, or SignalR hubs.
Use when writing, editing, or reviewing C# code that uses System.Reactive (Rx.NET); working with `IObservable`, `IObserver`, `Subject`, `BehaviorSubject`, `ReplaySubject`, or `AsyncSubject`; composing operators like `Select`, `Where`, `Merge`, `Switch`, `Publish`, `RefCount`, `Catch`, `Retry`, `ObserveOn`, or `SubscribeOn`; managing subscription lifecycle with `CompositeDisposable`, `SerialDisposable`, or `DisposeWith`; testing time-dependent reactive code with `TestScheduler` from `Microsoft.Reactive.Testing`; designing hot vs cold observables or enforcing the Rx serial-notification contract. Triggers on phrases like "observable stream", "reactive pipeline", "Rx.NET", "subject leak", "OnNext on wrong thread", "test scheduler", or edits touching files that import `System.Reactive`. Do NOT use for plain `IEnumerable` LINQ, `IAsyncEnumerable`, or TPL `Task`-based async.
How to create a Beachball change file. ONLY use this skill when the user asks to generate change files, before pushing a branch, or before creating a PR.
Work on Rally's own codebase, not running benchmarks with it. Use when setting up the dev environment, running Rally's tests or linters, navigating its source, debugging Rally's own code, or making changes to Rally itself.