Total 31,058 skills, Backend Development has 3052 skills
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Develop Python applications using modern patterns, uv, functional-first design, and production-first practices. Use this whenever working with .py files, pyproject.toml, uv commands, pip/pip3, poetry, virtualenv/venv, inline script metadata, or Python tooling like pytest, mypy, ruff, asyncio, itertools, functools, or dataclasses. If the task involves running Python, managing Python dependencies, creating environments, or building Python packages, load this skill and prefer uv-oriented workflows.
Brutally honest Rails code review from DHH's perspective. Use when reviewing Rails code for anti-patterns, JS framework contamination, or violations of Rails conventions.
IoT protocols: Zigbee (mesh), Z-Wave (home), LoRaWAN (long-range), CoAP (lightweight), Matter (interoperable), Thread (I
API architecture: REST design, versioning, HATEOAS, auth patterns, OpenAPI docs, gateway patterns
SMS/MMS: send/receive, TwiML, webhooks, delivery receipts, opt-out, A2P 10DLC, short codes
DDD: bounded contexts, aggregates, entities, value objects, domain events, ubiquitous language
Implements networking for multiplayer games, handling protocols, latency, and synchronization.
Use Electric with Drizzle ORM or Prisma for the write path. Covers getting pg_current_xact_id() from ORM transactions using Drizzle tx.execute(sql) and Prisma $queryRaw, running migrations that preserve REPLICA IDENTITY FULL, and schema management patterns compatible with Electric shapes. Load when using Drizzle or Prisma alongside Electric for writes.
Generate pure mapper functions for transformations between layers, HTTP DTOs to use case inputs dtos, use case to response dto, etc.
Guide for creating, updating, and deprecating hybrid cloud RPC services in Sentry. Use when asked to "add RPC method", "create RPC service", "hybrid cloud service", "new RPC model", "deprecate RPC method", "remove RPC endpoint", "cross-silo service", "regional RPC", or "control silo service". Covers service scaffolding, method signatures, RPC models, region resolvers, testing, and safe deprecation workflows.
Bootstrap a new SaaS from the SaaS Seeder Template: setup database, configure environment, create super admin user, and verify three-tier panel structure. Use when initializing a new multi-tenant SaaS project from this template.
Comprehensive guide for building OpenAPI endpoints with chanfana - schema definition, request validation, CRUD operations, D1 database integration, and exception handling