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Found 234 Skills
Create and use Inngest middleware for cross-cutting concerns. Covers the middleware lifecycle, creating custom middleware, dependency injection, and built-in middleware for encryption and error tracking.
Apply React Router 7 framework mode best practices including server-first data fetching, type-safe loaders/actions, proper hydration strategies, middleware authentication, handle metadata, useMatches/useRouteLoaderData hooks, and maximum type safety. Use when working with React Router 7 framework mode, implementing loaders, actions, route protection, breadcrumbs, streaming with Suspense/Await, URL search params, form validation, optimistic UI, resource routes (API endpoints), route configuration, or building SSR applications.
Sails.js framework patterns for The Boring JavaScript Stack - actions, helpers, routes, policies, hooks, configuration, security, middleware, file uploads, deployment, and more. Use this skill when building, reviewing, or debugging any server-side code in a Sails.js application.
Manages SAPUI5/OpenUI5 projects using the UI5 Tooling CLI (@ui5/cli). Use when initializing UI5 projects, configuring ui5.yaml or ui5-workspace.yaml files, building UI5 applications or libraries, running development servers with HTTP/2 support, creating custom build tasks or server middleware, managing workspace/monorepo setups, troubleshooting UI5 CLI errors, migrating between UI5 CLI versions, or optimizing build performance. Supports both OpenUI5 and SAPUI5 frameworks with complete configuration and extensibility guidance.
FastAPI done right. Async patterns, dependency injection, Pydantic v2 models, middleware, and project structure.
Builds ASP.NET Core APIs, EF Core data access, gRPC, SignalR, and backend services with middleware, security (OAuth, JWT, OWASP), resilience, messaging, OpenAPI, .NET Aspire, Semantic Kernel, HybridCache, YARP reverse proxy, output caching, Office documents (Excel, Word, PowerPoint), PDF, and architecture patterns. Spans 32 topic areas. Do not use for UI rendering patterns or CI/CD pipeline authoring.
Structured logging extensions for Golang using samber/slog-**** packages — multi-handler pipelines (slog-multi), log sampling (slog-sampling), attribute formatting (slog-formatter), HTTP middleware (slog-fiber, slog-gin, slog-chi, slog-echo), and backend routing (slog-datadog, slog-sentry, slog-loki, slog-syslog, slog-logstash, slog-graylog...). Apply when using or adopting slog, or when the codebase already imports any github.com/samber/slog-* package.
Go error handling patterns, wrapping, sentinel errors, custom error types, and the errors package. Grounded in Effective Go, Go Code Review Comments, and production-proven idioms. Use when implementing error handling, designing error types, debugging error chains, or reviewing error handling patterns. Trigger examples: "handle errors", "error wrapping", "custom error type", "sentinel errors", "errors.Is", "errors.As". Do NOT use for panic/recover patterns in middleware (use go-api-design) or test assertion errors (use go-test-quality).
Mailchimp platform help — email marketing campaigns, Customer Journey Builder automations, SMS marketing, audience management/CRM, landing pages, A/B testing, multivariate testing, transactional email (Mandrill), Content Studio, generative AI (Intuit Assist), retargeting ads, 300+ integrations. Use when asking 'how do I do X in Mailchimp', setting up Mailchimp campaigns, configuring Customer Journey Builder, managing Mailchimp audiences, using Mandrill transactional email, or troubleshooting Mailchimp deliverability. Do NOT use for general email marketing strategy (use /sales-email-marketing), cross-platform email deliverability (use /sales-deliverability), funnel strategy (use /sales-funnel), or connecting tools via middleware (use /sales-integration).
Configure security headers to defend against clickjacking, XSS, MIME confusion, and SSL stripping attacks. Use this skill when you need to set up Content-Security-Policy, X-Frame-Options, HSTS, configure middleware headers, or understand browser security features. Triggers include "security headers", "CSP", "content security policy", "X-Frame-Options", "HSTS", "clickjacking", "MIME confusion", "middleware headers".
Review Express.js security audit patterns for middleware and routes. Use for auditing Helmet.js, CORS, body-parser limits, and auth middleware. Use proactively when reviewing Express.js apps. Examples: - user: "Secure my Express app" → add Helmet.js and disable x-powered-by - user: "Check Express CORS config" → verify origin allowlists and credentials - user: "Review Express auth middleware" → check route order and coverage - user: "Scan for Express path traversal" → verify path normalization and validation - user: "Audit Express session config" → check secure, httpOnly, and sameSite flags
Use when billing for AI model token usage — setting up @commet/ai-sdk tracked() middleware, configuring balance consumption model plans with AI model pricing, tracking input/output/cache tokens, cost calculation with margins, or building AI products that need usage-based billing.