Claude Skills by rootcastleco

Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications. Covers async/await, dependency injection, Entity Framework Core, Dapper, configuratio...

Build ASP.NET Core 8+ backend services with EF Core, auth, background jobs, and production API patterns.

Automate Dropbox file management, sharing, search, uploads, downloads, and folder operations via Rube MCP (Composio). Always search tools first for current schemas.

Developer Experience specialist. Improves tooling, setup, and

Master end-to-end testing with Playwright and Cypress to build reliable test suites that catch bugs, improve confidence, and enable fast deployment. Use when implementing E2E tests, debugging flaky...

Write idiomatic Elixir code with OTP patterns, supervision trees,

When the user wants to create or optimize an email sequence, drip campaign, automated email flow, or lifecycle email program. Also use when the user mentions \"email sequence,\" \"drip campa...

Email has the highest ROI of any marketing channel. $36 for every $1 spent. Yet most startups treat it as an afterthought - bulk blasts, no personalization, landing in spam folders. This skill cov...

Select and optimize embedding models for semantic search and RAG applications. Use when choosing embedding models, implementing chunking strategies, or optimizing embedding quality for specific dom...

Create employment contracts, offer letters, and HR policy documents following legal best practices. Use when drafting employment agreements, creating HR policies, or standardizing employment docume...

You are an expert error analysis specialist with deep expertise in debugging distributed systems, analyzing production incidents, and implementing comprehensive observability solutions.

You are an error tracking and observability expert specializing in implementing comprehensive error monitoring solutions. Set up error tracking systems, configure alerts, implement structured loggi...

Use when working with error debugging multi agent review

Search logs and codebases for error patterns, stack traces, and

You are an expert error analysis specialist with deep expertise in debugging distributed systems, analyzing production incidents, and implementing comprehensive observability solutions.

You are an error tracking and observability expert specializing in implementing comprehensive error monitoring solutions. Set up error tracking systems, configure alerts, implement structured logging,

Use when working with error diagnostics smart debug

Master error handling patterns across languages including exceptions, Result types, error propagation, and graceful degradation to build resilient applications. Use when implementing error handling...

This skill should be used when the user asks to \"learn ethical hacking\", \"understand penetration testing lifecycle\", \"perform reconnaissance\", \"conduct security scanning\", \"exploit ...

Build evaluation frameworks for agent systems

Expert in event sourcing, CQRS, and event-driven architecture patterns. Masters event store design, projection building, saga orchestration, and eventual consistency patterns. Use PROACTIVELY for e...

Design and implement event stores for event-sourced systems. Use when building event sourcing infrastructure, choosing event store technologies, or implementing event persistence patterns.

Semantic search, similar content discovery, and structured research using Exa API

Use when you have a written implementation plan to execute in a separate session with review checkpoints

Deploy Expo apps to production

Text-to-speech and speech-to-text using fal.ai audio models

Generate images and videos using fal.ai AI models

AI-powered image editing with style transfer and object removal

Platform APIs for model management, pricing, and usage tracking

Upscale and enhance image and video resolution using AI

Generate workflow JSON files for chaining AI models

Build high-performance async APIs with FastAPI, SQLAlchemy 2.0, and

Create FastAPI routers with CRUD operations, authentication dependencies, and proper response models. Use when building REST API endpoints, creating new routes, implementing CRUD operations, or add...

Create production-ready FastAPI projects with async patterns, dependency injection, and comprehensive error handling. Use when building new FastAPI applications or setting up backend API projects.

Web fuzzing with ffuf

Automate Figma tasks via Rube MCP (Composio): files, components, design tokens, comments, exports. Always search tools first for current schemas.

Intelligently organizes files and folders by understanding context, finding duplicates, and suggesting better organizational structures. Use when user wants to clean up directories, organize downlo...

This skill should be used when the user asks to \"test for directory traversal\", \"exploit path traversal vulnerabilities\", \"read arbitrary files through web applications\", \"find LFI vu...

Expert at handling file uploads and cloud storage. Covers S3, Cloudflare R2, presigned URLs, multipart uploads, and image optimization. Knows how to handle large files without blocking. Use when: f...

Find bugs, security vulnerabilities, and code quality issues in local branch changes. Use when asked to review changes, find bugs, security review, or audit code on the current branch.

Use when implementation is complete, all tests pass, and you need to decide how to integrate the work - guides completion of development work by presenting structured options for merge, PR, or cleanup

Firebase gives you a complete backend in minutes - auth, database, storage, functions, hosting. But the ease of setup hides real complexity. Security rules are your last line of defense, and they'r...

Deep web scraping, screenshots, PDF parsing, and website crawling using Firecrawl API

Expert firmware analyst specializing in embedded systems, IoT

Verify fix commits address audit findings without new bugs

Master Flutter development with Dart 3, advanced widgets, and

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Handle errors as values using fp-ts Either and TaskEither for cleaner, more predictable TypeScript code. Use when implementing error handling patterns with fp-ts.

A practical, jargon-free guide to fp-ts functional programming - the 80/20 approach that gets results without the academic overhead. Use when writing TypeScript with fp-ts library.

Practical patterns for using fp-ts with React - hooks, state, forms, data fetching. Use when building React apps with functional programming patterns. Works with React 18/19, Next.js 14/15.