Backend & APIs · Refactoring

NestJS best practices and architecture patterns for building production-ready applications.

rolling-scopes/rsschool-app

Avoid common Ruby and Rails antipatterns that degrade maintainability and performance.

doorkeeper-gem/doorkeeper

Build, review, refactor, or architect ASP.NET Core web applications using current official guidance for .NET web development.

fanslead/ReverseProxy.Store

Design, implement, and verify behavior changes in App-Store-Connect-CLI.

rorkai/App-Store-Connect-CLI

Write, refactor, and review Rails code using layered architecture principles from "Layered Design for Ruby on Rails Applications".

evilmartians/redprints-cfp

A skill your agent uses when implementing, debugging, refactoring, or testing existing BootUI Java code, including framework-neutral engine logic, Spring MVC and WebFlux adapters, Quarkus runtime…

jdubois/boot-ui

General coding-style rules to apply to every project. An agent skill from rust-dd/tako.

rust-dd/tako

A skill your agent uses when optimizing, refactoring, reviewing, or fixing AtomUI controls, including control API contracts, member layout, file splitting, lifecycle, AXAML structure, correctness…

AtomUI/AtomUI

Idiomatic Go conventions — naming, error handling, concurrency, interfaces, testing, and API design.

asymmetric-research/solana-exporter

A skill your agent uses when implementing, refactoring, or reviewing @crowdin/crowdin-api-client usage in any JavaScript or TypeScript project, especially for endpoint selection, request/response…

crowdin/crowdin-cli

Refactor oversized agent instruction files into a progressive-disclosure structure.

micronaut-projects/micronaut-openapi

Comprehensive Rust coding guidelines with 265 rules across 26 categories.

JMBeresford/retrom

Use before finalizing or opening/updating a PR for non-trivial code changes, especially third-party integrations, compatibility layers, hooks and filters, lifecycle code, providers, abstractions…

PopupMaker/Popup-Maker

Create or refactor Foundry deployment fixtures for Solidity tests.

aviggiano/security

Comprehensive Rust coding guidelines with 179 rules across 14 categories.

noh-rs/nohrs

Apply Whispering service-boundary patterns for UI-free capabilities, explicit inputs, Result fallibility, Live objects, lifecycle factories, and platform variants.

EpicenterHQ/epicenter

Generate, scaffold, or refactor code so it embodies FIASSE v1.0.4 SSEM qualities by default — 10 attributes, Transparency and Least-Astonishment principles, ASVS-aligned controls, defensive boundary…

OWASP/secure-agent-playbook

Define backend API contract standards for FastAPI services. An agent skill from AUTO-MAS-Project/AUTO-MAS.

AUTO-MAS-Project/AUTO-MAS

Agent Landing Zone Orchestrator architecture and implementation principles.

Azure/agent-app-orchestrator

Guides modern Rails 8 code architecture decisions and patterns.

ThibautBaissac/rails_ai_agents

Implement and review Java code changes for Micronaut framework repositories using maintainer standards, including JSpecify null-safety conventions.

micronaut-projects/micronaut-openapi

Structure Django business logic as plain services that receive their dependencies via constructor injection, and wire them through an svcs registry so they can be resolved anywhere — views, Celery…

dvf/opinionated-django

Process [APPROVE] and [IGNORE] replies on /refactor review threads.

NomaDamas/AutoRAG-Research

A skill your agent uses when adding, refactoring, or reviewing AUTO-MAS plan schedule types, including backend PlanConfig registration, plan API/schema contracts, plan combobox consumers, frontend…

AUTO-MAS-Project/AUTO-MAS

Guides decisions about when and how to extract code into services, queries, concerns, form objects, or other patterns.

ThibautBaissac/rails_ai_agents

Launches and manages the local OpenAI Codex CLI as a non-interactive coding sub-agent via ChatGPT Pro OAuth, never API keys.

daymade/claude-code-skills

A skill your agent uses when generating or refactoring Spring Boot 4 JPA entities, repositories, queries, projections, persistence tests, entity relationships, embeddables, IDs, or Hibernate mappings.

rrezartprebreza/spring-boot-skills

Review, write, or refactor compartment repo tests by starting with a fast independent test-review pass, protecting behavior, using the right package-owned harness, and refusing implementation-mirror…

compartmentdev/compartment

Build a typed Attio REST client with tenant-aware tokens, endpoint-specific pagination, structured errors, bounded retries, and contract tests while distinguishing it from the Attio App SDK.

jeremylongshore/tons-of-skills-marketplace

Implement current Linear TypeScript SDK query, mutation, pagination, raw GraphQL, and error-handling patterns.

jeremylongshore/tons-of-skills-marketplace

Analyze and design a typed Salesloft REST adapter with tenant-bound authentication, endpoint-specific schemas, pagination, errors, and rate metadata.

jeremylongshore/tons-of-skills-marketplace

Apply production-ready patterns for @shopify/shopify-api including typed GraphQL clients, session management, and retry logic.

jeremylongshore/tons-of-skills-marketplace

Primary Apex authoring skill for class generation, refactoring, and review.

forcedotcom/sf-skills

Contract co-ship for Compozy wire changes. An agent skill from compozy/compozy.

compozy/compozy

A skill your agent uses when writing, reviewing or refactoring modern Java (21+, 25 LTS) — records and sealed interfaces as algebraic data types, exhaustive pattern-matching switch over instanceof…

ericrisco/rsc-harness

A skill your agent uses when writing or refactoring plain Ruby outside Rails — scripts, CLIs, gems, libraries: Enumerable chains and blocks, module mixins and value objects, Bundler/gemspec…

ericrisco/rsc-harness

Apply production-ready TwinMind SDK patterns for TypeScript and Python.

jeremylongshore/tons-of-skills-marketplace

Build or modify backend APIs, services, jobs, persistence, and integrations while preserving contracts, authorization, data integrity, and failure behavior.

hashgraph-online/awesome-codex-plugins

Write Ruby and Rails code in DHH's distinctive 37signals style.

Microck/ordinary-claude-skills

Drive Django features with outside-in and double-loop TDD: user story, Selenium or functional test, focused Django unit/integration tests, minimal implementation, and refactor.

hashgraph-online/awesome-codex-plugins

Design faster, clearer Django test data and test structure with factories, setUpTestData, SimpleTestCase/TestCase choices, fixture-file cleanup, query optimization, and unit-vs-integration boundaries.

hashgraph-online/awesome-codex-plugins

Design and review Rust trait APIs, generic bounds, dispatch models, and conversion contracts for clear public interfaces.

hashgraph-online/awesome-codex-plugins

Modern Java (17/21+ LTS) idioms: records, sealed classes, pattern matching switch, Optional hygiene, streams, and JUnit 5 testing.

irahardianto/awesome-agv

Modern PHP 8.x idioms: strict types, typed properties, enums, readonly classes, match expressions, and PSR standards.

irahardianto/awesome-agv

A full development pipeline where an agent team collaborates to develop fullstack web apps through requirements analysis, design, frontend, backend, testing, and deployment.

revfactory/harness-100