Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.
Find what builders are adding. Remember what you took.
Skills, agents, connectors, harnesses, rules, and tools from GitHub, sorted the way you actually look for them. Add one and it's in your library, with the link ready for your agent.
3,617 repos · any GitHub repo works: sandbx.ai/owner/repo
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Gaining stars and adds this week, weighted so the giants don't own the list.
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
An agentic skills framework & software development methodology that works.

Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local deterministic AST parsing, every edge explained, no vector store.
🪨 why use many token when few token do trick — Claude Code skill that cuts 65% of tokens by talking like caveman
The agent that grows with you
Topic in, narrated explainer video out. A Claude Code / Codex skill that turns any topic into a black-canvas motion-graphics explainer video with TTS voiceover, subtitles and a chapter progress bar. Chinese or English; every frame drawn in code with Remotion.
Public repository for Agent Skills

Graphs that teach > graphs that impress. Turn any code into an interactive knowledge graph you can explore, search, and ask questions about. Works with Claude Code, Codex, Cursor, Copilot, Gemini CLI, and more.
Open-source AI job search: scan job portals, evaluate listings into a structured A-H report with a global 1-5 score, tailor your CV, track applications — runs locally in your AI coding CLI (Claude Code, Codex, OpenCode, Antigravity…)

Production-grade engineering skills for AI coding agents.
An AI skill that provides design intelligence for building professional UI/UX across multiple platforms.
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What people on Sandbox are putting in their libraries.
Copier template for a Cloudflare Worker that serves Better Auth + a shadcn/ui login SPA, backed by D1
An agentic skills framework & software development methodology that works.
Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local deterministic AST parsing, every edge explained, no vector store.
🪨 why use many token when few token do trick — Claude Code skill that cuts 65% of tokens by talking like caveman
Extracted system prompts from Anthropic - Claude Fable 5.1, Opus 5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro, Antigravity. xAI - Grok, Grok Bot, Cursor, Kimi and more! Updated regularly.

Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors
Cofounder is a project harness that turns your AI coding agent into a technical cofounder.
New on Sandbox
Copier template for a Cloudflare Worker that serves Better Auth + a shadcn/ui login SPA, backed by D1
Cofounder is a project harness that turns your AI coding agent into a technical cofounder.
Your memories are in ChatGPT... But nowhere else. Universal Memory MCP makes your memories available to every single LLM. No logins or paywall. One command to set it up.
Model Context Protocol (MCP) plugin to connect with Unity Editor — designed for Cursor, Claude Code, Codex, Windsurf and other IDEs
Use ChatGPT Developer Mode as a local coding agent for your repo through MCP.
Official Microsoft Learn MCP Server and CLI tool – powering LLMs and AI agents with real-time, trusted Microsoft docs & code samples.
AI agent skills for App Store Optimization (ASO) and app marketing. Built for indie developers, app marketers, and growth teams who want Cursor, Claude Code, or any Agent Skills-compatible AI assistant to help with keyword research, metadata optimization, competitor analysis, and app growth.
A Go framework for building production agent systems with graph workflows, tools, memory, A2A, AG-UI, MCP, evaluation, and observability.