Backend

Use this skill whenever the user wants to set up, configure, or refactor TypeORM within a NestJS TypeScript project, including data sources, entities, migrations, repositories, relations, and transactional patterns.

Generates README files, API documentation, changelogs, runbooks, and SDK code from project analysis. Use when creating documentation, generating changelogs, documenting APIs, creating runbooks, or generating client SDKs.

Apply input validation best practices including server-side validation, early failure, specific error messages, and input sanitization. Use this skill when validating user input in n8n nodes, implementing parameter validation, checking data types and formats, sanitizing input to prevent injection attacks, or writing business rule validation. Apply when handling API endpoints, form inputs, or any data entry points in n8n node development.

Complete ArgoCD API and CLI skill for GitOps automation. Use when working with ArgoCD for: (1) Managing Applications - create, sync, delete, rollback, get status, (2) ApplicationSets - templated multi-cluster deployments, (3) Projects - RBAC, source/destination restrictions, sync windows, (4) Repositories - add/remove Git repos, Helm charts, OCI registries, (5) Clusters - register, rotate credentials, manage multi-cluster, (6) Accounts - generate tokens, manage users, check permissions, (7) Any ArgoCD REST API calls or argocd CLI commands. Supports both REST API (curl/HTTP) and CLI wrapper approaches with bearer token authentication.

Master ASP.NET Core deployment, Docker, Azure cloud, CI/CD pipelines, and production infrastructure for enterprise applications.

Master backend frameworks and languages including Node.js, Python, Java, Go, GraphQL, and RESTful API design. Use when building server applications, APIs, or backend services.

Interact with the OpenSea NFT marketplace API. Use when fetching NFT metadata, collection info, listings, offers, events, or building NFT applications with OpenSea's REST and Stream APIs.

Provides patterns and guidance for implementing user-scoped data filtering and multi-tenancy in web applications. Use this skill when you need to: (1) Restrict data access based on user identity, (2) Implement ownership checks for database operations, (3) Build multi-tenant applications with organization-level data scoping, (4) Implement admin bypass for viewing all data, (5) Create audit trails for data access. This skill focuses on Python, FastAPI, and SQLAlchemy.

Master backend API development with Node.js, Python, PHP, Java, C#, GraphQL, REST APIs, databases, and microservices. Learn server-side architecture, authentication, scalability, and production deployment.

Ruby 3.4+ best practices with RSpec 4, RuboCop 2, Bundler, and Rails 8 patterns.

Phase-aware context management for coder agents to prevent token bloat through checkpoint/restore pattern

Laravel Prompts - Beautiful and user-friendly forms for command-line applications with browser-like features including placeholder text and validation

Implements database integration patterns for Rust backends using SQLx and SeaORM. Use when setting up database connections, writing queries, defining entities, managing migrations, or configuring connection pools. Covers compile-time checked SQL, ORM patterns, and N+1 prevention.

Rust Axum API with Diesel ORM and DDD architecture.

Operate the local Scribe MCP for any ~/projects/* repo; use when registering the server, setting projects, drafting ARCH/PHASE/CHECKLIST via manage_docs, or logging work with append_entry/get_project safeguards.

Build Apify Actors (web scrapers) using Node.js and Crawlee. Use when creating new scrapers, defining input schemas, configuring Dockerfiles, or deploying to Apify. Triggers include apify, actor, scraper, crawlee, web scraping, data extraction.

Production-tested patterns for fault-tolerant browser audio with zero-lag rapid-fire support. Use when implementing sound effects, background music, voice feedback, or any audio playback in web applications. Covers AudioContext singleton, preloading, cloneNode for rapid-fire, autoplay handling, and Web Audio API effects.

Modern authentication and security patterns for web applications. Expert in JWT tokens, OAuth2 flows, session management, RBAC, MFA, API security, and zero-trust architectures. Framework-agnostic patterns that work with any tech stack.

CRITICAL: Use this skill when working with Prisma database models, API routes with includes/relations, or debugging "500 errors", "relation not found", "undefined from backend" errors.AUTO-ACTIVATE when user mentions (FR/EN): - prisma, relation, relations, mapping, PascalCase, camelCase - API 500, erreur 500, backend error, erreur backend - undefined, null, relation introuvable, relation not found - créer API, create API, endpoint, route API - include, select, findMany, findUnique, create, update - OperatingRoom, OperatingSector, Personnel, Assignment, SiteThis skill contains the COMPLETE mapping table for post-PascalCase migration (Oct 26, 2025). ALL 121 models with correct relation names and required fields.

Design and create Claude Skills for this Rails event-sourced codebase. Use when you need to capture repeatable workflows, complex multi-step processes, or domain-specific patterns that Claude should handle consistently.