The best backend and apis mods

openai/codex

Instructions file CodexOpenCode

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

google-gemini/gemini-cli

Skill Claude CodeCodex

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Gemini CLI's capabilities with specialized knowledge, workflows, or tool integrations.

google-gemini/gemini-cli

Skill Claude CodeCodexGemini CLI

Use this skill during code reviews to proactively investigate the codebase for duplicated functionality, reinvented wheels, or failure to reuse existing project best practices and shared utilities.

microsoft/generative-ai-for-beginners

Skill Claude CodeCodex

Migrate Python apps from Azure OpenAI Chat Completions to the Responses API. Covers AzureOpenAI/AsyncAzureOpenAI client migration to the v1 endpoint, streaming, tools, structured output, multi-turn, EntraID auth, and model compatibility checks. Python-focused, Azure OpenAI-specific. USE FOR: migrate to responses API…

microsoft/ai-agents-for-beginners

Skill Claude CodeCodex

Migrate Python apps from Azure OpenAI Chat Completions to the Responses API. Covers AzureOpenAI/AsyncAzureOpenAI client migration to the v1 endpoint, streaming, tools, structured output, multi-turn, EntraID auth, and model compatibility checks. Python-focused, Azure OpenAI-specific. USE FOR: migrate to responses API…

openai/openai-cookbook

Skill Claude CodeCodex

Bootstrap a new realtime eval folder inside this cookbook repo by choosing the right harness from examples/evals/realtimeevals, scaffolding prompt/tools/data files, generating a useful README, and validating it with smoke, full eval, and test runs. Use when a user wants to start a new crawl, walk, or run realtime eval…

openai/openai-cookbook

Skill Claude CodeCodex

Review and edit OpenAI Cookbook notebooks, Markdown, and MDX for technical accuracy, clarity, grammar, consistency, runnable examples, and repository publication requirements. Use for editorial reviews, pre-merge documentation checks, or notebook Markdown-cell sweeps in openai-cookbook.

browser-use/browser-use

Skill Claude CodeCodex

Set up Browser Use Cloud payments with x402 — pay per request from a crypto wallet (USDC on Base mainnet), no signup or API key. Two setups it works out up front — "just use it" (set up a wallet so you or Claude Code can run cloud browser tasks paid from the wallet — Claude writes and runs throwaway scripts, nothing…

paperclipai/paperclip

Skill Claude CodeCodex

Interact with the Paperclip control plane API for task coordination and governance. Use when checking assignments, updating issue status, posting comments, delegating work, managing routines, or calling Paperclip API endpoints.

anthropics/claude-cookbooks

Instructions file

Claude Code instructions for anthropics/claude-cookbooks, covering claude cookbooks, quick start, install dependencies, install pre-commit hooks and set up api key.

paperclipai/paperclip

Skill Claude CodeCodex

Interact with the Paperclip control plane API for task coordination and governance. Use when checking assignments, updating issue status, posting comments, delegating work, managing routines, or calling Paperclip API endpoints.

google-gemini/gemini-cli

Command Gemini CLI

These rules apply strictly to all code modifications and additions within the Gemini CLI project.

bytedance/deer-flow

Instructions file CodexOpenCode

Instructions for bytedance/deer-flow, covering agents.md, what is deerflow, service topology, repository map and commands: root vs. module.

google-gemini/gemini-cli

Instructions file Gemini CLI

Instructions for google-gemini/gemini-cli, covering gemini cli project context, project overview, building and running, testing and quality and development conventions.

fastapi/fastapi

Skill Claude CodeCodex

FastAPI best practices and conventions. Use when working with FastAPI APIs, Pydantic models, dependencies, streaming responses including Server-Sent Events (SSE), and serving frontend apps. Keeps FastAPI code clean and up to date with the latest features and patterns.