Backend and APIs Cursor rules

PatrickJS/awesome-cursorrules

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Cursor rules for Convex development with best practices.

PostHog/posthog

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Rules for writing Python services at PostHog (Python servers powered by the Django framework).

iii-hq/iii

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Documentation agent using Divio system for docs/ directory.

windmill-labs/windmill

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Windmill is an open-source developer platform for building internal tools, API integrations, background jobs, workflows, and user interfaces. It offers a unified system where scripts are automatically turned into sharable UIs and can be composed into flows or embedded in custom applications.

microsoft/data-formulator

Cursor rule Cursor ✓ vendor

Prevent information exposure through exception messages in HTTP responses.

Arize-ai/phoenix

Cursor rule Cursor

The arize-phoenix package consists of a sub-package named arize-phoenix-client which has the full functionality to communicate to the phoenix server. There is a legacy client exported at the top level of the arize-phoenix package that is being deprecated. Here are common migration patterns.

higress-group/higress

Cursor rule Cursor

Plugin Development Standards - Applies to all new wasm and golang-filter plugins.

lightdash/lightdash

Cursor rule Cursor

Cursor rule "backend" from lightdash/lightdash, covering architecture overview, key performance considerations, development guidelines, testing and controllers.

ModelEngine-Group/nexent

Cursor rule Cursor

App layer (API) contract for FastAPI endpoints in backend/apps. Parse/validate input, call services, map domain errors to HTTP, return JSONResponse on success.

cool-team-official/cool-admin-midway

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A set of coding rules for controllers, the parts of an application that receive requests and return responses. It covers route prefixes and manual or automatic handling.

wassim249/fastapi-langgraph-agent-production-ready-template

Cursor rule Cursor

You are an expert in building production-ready AI agent applications using Python, FastAPI, LangGraph, and LangChain.

openstatusHQ/data-table-filters

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Install and wire up data-table-filters — filterable React data tables with server-side filtering, faceted counts, infinite scroll, and virtualization, delivered as shadcn registry blocks.

agentset-ai/agentset

Cursor rule Cursor

Comprehensive rules to help you write advanced Trigger.dev tasks.

TencentEdgeOne/edgeone-makers-tools

Cursor rule Cursor needs its repo

This skill guides building AI agent endpoints on EdgeOne Makers — five framework routes (DeepAgents, LangGraph, CrewAI, OpenAI Agents SDK, Claude Agent SDK), platform-injected context.store / context.tools / context.sandbox, conversationid dual-channel routing, SSE streaming, and agents/ vs cloud-functions/…

nixopus/nixopus

Cursor rule Cursor

Go API Development Rules for Nixopus Backend.

qinshihu/itops-agent-platform

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ITops Agent is a one-stop intelligent ops platform. Stack: Node.js + Express + TypeScript + SQLite (backend) / React + Vite + Ant Design + Tailwind (frontend). DDD modules: 24 backend modules + 23 frontend modules. See .trae/rules/architecture.md §1.2.

grft-dev/graftcode

Cursor rule Cursor

Mandatory Graftcode architecture rules for building .NET backend services (class libraries exposed via Graftcode Gateway, not REST).

sullyo/webapp-starter

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You are an expert TypeScript software engineer and architect with over 10 years of industry experience. Your expertise spans the entire stack, including React, Next.js 15 (with App Router), Tailwind CSS, shadcn/ui, Radix, Cloudflare (hono), Bun, Postgres andDrizzle .

PaulJPhilp/EffectPatterns

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Cursor rule "error-handling-pattern-3-custom-error-strategies" from PaulJPhilp/EffectPatterns, covering error handling pattern 3: custom error strategies and example.

PostHog/posthog-foss

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description: Rules for writing Python services at PostHog (Python servers powered by the Django framework) globs: .py alwaysApply: false.

jamro/tiny-engineer

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When HTTP routes change, update the web UI API page and API docs together.

slowlyo/owl-admin

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A set of project rules for Owl Admin, a Laravel-based framework for building web administration panels. It guides how the project should use its page renderer, controllers, services, menus, permissions, APIs, and code generator.

adaline/gateway

Cursor rule Cursor needs its repo

The gateway core module is the central orchestrator that handles AI provider requests, manages caching, queuing, and provides unified interfaces for chat completion, embeddings, and tool responses.

mrwogu/promptscript

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You are working on the checkout service. Preserve transaction integrity and auditability.