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"Context engineering is the delicate art and science of filling the context window with just the right information for the next step." — Andrej Karpathy. A frontier, first-principles handbook inspired by Karpathy and 3Blue1Brown for moving beyond prompt engineering to the wider discipline of context design, orchestration, and optimization.

Free, local tool to track AI coding token usage and cost across 31 tools and agents (Claude Code, Cursor, Codex, Gemini and more), by model, project, and task. npx codeburn

The last Markdown editor, ever.

Claude-first paid-media operations skill for Claude Code across 12 ad platforms (Google, Meta, YouTube, LinkedIn, TikTok, Microsoft, Apple, Amazon, Reddit, Pinterest, Snapchat, X): source-grounded audits, deterministic scoring, versioned JSON reports, and capability-gated account changes.

Backrest is a web UI and orchestrator for restic backup.

Ship AI Agents to Google Cloud in minutes, not months. Production-ready templates with built-in CI/CD, evaluation, and observability.

The break time reminder app

syzkaller is an unsupervised coverage-guided kernel fuzzer

Open-source framework for building AI-powered apps in JavaScript, Go, and Python, built and used in production by Google

The first "code-first" agent framework for seamlessly planning and executing data analytics tasks.

Open Source Routing Engine for OpenStreetMap

🌤️ OpenCloud is the open source platform for file management, sharing and collaboration. Simple and sovereign.

Fast and Accurate Code Search for Agents. Uses ~98% fewer tokens than grep+read

OpenClaw: Use All Major AI Models NO API Token! Claude/ChatGPT/Gemini/DeepSeek/Doubao/Grok/Qwen/Manus/Kimi

GitHub Agentic Workflows

Harness LLMs with Multi-Agent Programming

Claude / Codex / Gemini API Proxy - CCX

Get your data in RAM. Get compute close to data. Enjoy the performance.

Red5 Server core

A personal knowledge base that builds and maintains itself. Drop in sources — Claude (or Codex/Gemini) reads them, extracts knowledge, and maintains a persistent interlinked wiki. Works with Claude Code, Codex, OpenCode, Gemini CLI. No API key needed.

Framework for evaluating and improving agents

All-in-One Native Local Development Environment for Windows, macOS & Linux. Docker alternative for PHP, Node.js, Python and more. Faster alternative to XAMPP, Laragon, MAMP and Laravel Herd with databases, Cron Jobs and runtime management.

Agent harness to make your slop code well-engineered and beautiful.

Headless CLI client for stateful Agent Client Protocol (ACP) sessions

Framework for AI agents to build and maintain a digital brain through Obsidian wiki using Karpathy's LLM Wiki pattern

README file generator, powered by AI.

A framework-agnostic, git-native standard for defining AI agents

SRE Agent - CNCF Sandbox Project

Build, Store, and Distribute your Applications and Containers

WebSocket and WAMP in Python for Twisted and asyncio