Open source. Open possibilities.

Curated archive of leaked system prompts from ChatGPT, Claude, Gemini, Grok, Copilot, Cursor, Perplexity and others, captured verbatim and organized by vendor with recent additions and change log.

Context Engineering Protocol provides AI coding-agent skills that assemble human-approved, source-attributed context packages — code graphs, requirements, org conventions, and constraints — before generation runs. It detects gaps, conflicts, and staleness across sources, gates output behind explicit human approval, and supports Claude Code, GitHub Copilot, Cursor, and OpenAI Codex.

Python and MCP example for an Apify actor that returns US House and Senate congressional stock trades and financial disclosures as structured JSON, with filters for member, ticker, and date range.

CodeAgent Mobile clients provide CLI, VS Code/Cursor/Windsurf, and JetBrains plugins to control AI coding agents (Claude Code, Copilot, etc.) from a phone or dashboard, enabling remote approval and workflow continuity.

DesignMD is a CLI tool that extracts live design systems from any URL — colors, typography, spacing, breakpoints, and interaction states — and outputs a portable DESIGN.md file optimized for AI coding agents.

Agent Reach is an internet access capability layer for AI Agents, automating tool selection, installation, health checks, and routing for platforms like YouTube, Bilibili, Twitter/X, and Reddit. Compatible with Claude Code, Cursor, and others, it supports multi-backend failover and local diagnostics.

Persistent memory engine for AI coding agents. Auto-captures sessions via hooks, stores in SQLite with BM25/vector/graph hybrid search, and serves 54 MCP tools across 20+ agents. Self-hosted, keyless, zero external dependencies.

nexus-vscode is an MCP proxy extension for VSCode and Cursor that forwards AI tool calls to Unreal Engine (UE) instances.

A collection of 120 plain-text DESIGN.md brand design specifications reverse engineered from live production sites, letting AI coding agents generate on-brand UI. Each brand includes real colors, typography, components and guardrails plus a self-contained preview.html.

OmniRoute is an open-source MIT-licensed AI gateway providing one unified endpoint to access 352+ AI providers and 1200+ models (150+ free tiers). It features quota-aware auto-fallback, token compression saving 15–95%, and integrates with Claude Code, Cursor, Cline, and other coding agents.

AAS Core is a local, agent-first control plane for discovering, selecting, validating and planning reusable agent skills from a catalog of 2,115+ skills, with CLI, local MCP, plugins and a browser Workbench.

Oh My OpenAgent (OmO) is an open-source AI coding agent toolkit with three editions: Ultimate for OpenCode, Light for Codex CLI, and standalone Senpi beta. It provides multi-model orchestration, ultrawork mode, parallel team agents, LSP/AST-Grep integration, and MCP support to automate and streamline software development workflows.

Open Kioku is a local repository intelligence tool for AI coding agents. It indexes codebases locally to provide context, generate bounded edit plans, and verify actual diffs against those plans.

Headroom compresses tool outputs, logs, RAG chunks, files, and conversation history before they reach the LLM, reducing token usage while preserving key information. Runs locally as a Python/TypeScript library, proxy, MCP server, or agent wrapper for Claude Code, Codex, Copilot, Cursor, and more.

A curated directory of 1000+ production-ready Claude Skills and plugins for enhancing AI agent productivity across Claude.ai, Claude Code, Cursor, Codex, Gemini CLI, and more.

An unofficial MCP server that gives AI assistants seven read-only tools to search, list and read any Fumadocs documentation site, working against a deployed URL or a local docs repo via a single npx command.

A multi-harness agentic plugin marketplace offering 94 plugins, 202 agents, 183 skills and 105 commands, generated from one Markdown source for Claude Code, Codex CLI, Cursor, OpenCode, Antigravity CLI and GitHub Copilot.

An AI-first engineering toolkit that provides specialized knowledge, workflows, and standards to turn AI coding agents into senior mobile engineers.

Umeng+ U-Web Analytics Skill 为 Cursor、Claude Code、通义灵码和 Qoder 等 AI 编程助手提供 HTML、H5、Vue、React、Next.js、Nuxt 及 SPA 项目的 U-Web 集成支持，涵盖 siteid 获取、事件埋点、SPA PV 处理与问题排查等功能。

designlang is a Playwright-based CLI that reads a website's live DOM and extracts its design system: DTCG tokens, Tailwind config, Figma variables, shadcn theme, component anatomy, motion tokens, brand voice, WCAG contrast audits, and multi-platform emitters, plus MCP server and Chrome extension.