AI
skill.md
Reusable agent skill packs and skill directories.
- https://developers.openai.com/codex/skills
- https://claude.com/docs/skills/overview
- https://github.com/sickn33/antigravity-awesome-skills
- https://github.com/obra/superpowers
- https://skills.sh/
- https://inference.sh/apps
- https://github.com/addyosmani/agent-skills
- https://github.com/K-Dense-AI/scientific-agent-skills
- https://skillsmp.com/
- https://github.com/browser-act/skills
- https://github.com/Leonxlnx/taste-skill
design.md
Free design instruction resources, design-md references, and visual taste libraries.
- https://github.com/VoltAgent/awesome-design-md
- https://stitch.withgoogle.com/
- https://designmd.ai/
- https://styles.refero.design/
- https://designmd.supply/
- https://designmd.me/
- https://github.com/bergside/design-md-chrome
agents.md
Agent instruction standards and repo guidance files.
- https://agents.md/
- https://developers.openai.com/codex/guides/agents-md
- https://github.com/openai/codex/blob/main/docs/agents_md.md
rule files
Editor/agent rule formats. Prefer current rule folders over old single-file formats where the tool supports it.
- https://docs.cursor.com/context/rules-for-ai
- https://github.com/PatrickJS/awesome-cursorrules
- https://cursor.directory/
- https://docs.claude.com/en/docs/claude-code/memory
- https://docs.cline.bot/customization/cline-rules
- https://docs.windsurf.com/
cli
Free/open-source or local-friendly terminal agents.
- https://github.com/openai/codex
- https://github.com/google-gemini/gemini-cli
- https://aider.chat/
- https://github.com/Aider-AI/aider
- https://github.com/anomalyco/opencode
- https://github.com/block/goose
- https://github.com/charmbracelet/crush
mcp
MCP specs, registries, SDKs, and free server directories.
- https://modelcontextprotocol.io/
- https://registry.modelcontextprotocol.io/
- https://github.com/modelcontextprotocol/servers
- https://github.com/modelcontextprotocol/typescript-sdk
- https://github.com/modelcontextprotocol/python-sdk
- https://github.com/punkpeye/awesome-mcp-servers
- https://smithery.ai/
- https://glama.ai/mcp
- https://mcp.so/
- https://www.pulsemcp.com/
plugin / apps
Plugin/app specs and examples. Use only free/local paths by default.
- https://developers.openai.com/codex/plugins
- https://developers.openai.com/apps-sdk/
- https://www.anthropic.com/engineering/desktop-extensions
- https://github.com/modelcontextprotocol/typescript-sdk
- https://github.com/modelcontextprotocol/python-sdk
api / local inference
Free/local/self-hostable inference and OpenAI-compatible gateways.
- https://github.com/ollama/ollama
- https://github.com/ggerganov/llama.cpp
- https://github.com/vllm-project/vllm
- https://github.com/sgl-project/sglang
- https://github.com/LocalAI/localai
- https://github.com/huggingface/text-generation-inference
- https://github.com/BerriAI/litellm
- https://github.com/open-webui/open-webui
agent frameworks
Open-source frameworks for agent workflows, tools, handoffs, memory, and orchestration.
- https://github.com/openai/openai-agents-python
- https://github.com/openai/openai-agents-js
- https://github.com/langchain-ai/langgraph
- https://github.com/crewAIInc/crewAI
- https://github.com/pydantic/pydantic-ai
- https://github.com/mastra-ai/mastra
- https://github.com/microsoft/autogen
- https://github.com/microsoft/semantic-kernel
- https://github.com/google/adk-python
- https://github.com/huggingface/smolagents
- https://github.com/agno-agi/agno
prompt.md
Free prompt engineering guides and prompt libraries.
- https://platform.openai.com/docs/guides/prompt-engineering
- https://docs.anthropic.com/en/docs/build-with-claude/prompt-engineering/overview
- https://ai.google.dev/gemini-api/docs/prompting-intro
- https://www.promptingguide.ai/
- https://github.com/dair-ai/Prompt-Engineering-Guide
- https://github.com/f/awesome-chatgpt-prompts
- https://github.com/anthropics/prompt-eng-interactive-tutorial
evals / benchmark
Free/open-source eval, regression, and benchmark tools.
- https://github.com/openai/evals
- https://github.com/promptfoo/promptfoo
- https://github.com/confident-ai/deepeval
- https://github.com/huggingface/lighteval
- https://github.com/EleutherAI/lm-evaluation-harness
- https://github.com/UKGovernmentBEIS/inspect_ai
- https://github.com/garak-llm/garak
browser / computer use
Free/local browser automation and computer-use tooling.
- https://playwright.dev/
- https://github.com/browser-use/browser-use
- https://github.com/browserbase/stagehand
- https://platform.openai.com/docs/guides/tools-computer-use
- https://docs.anthropic.com/en/docs/agents-and-tools/computer-use
memory / rag
Free/open-source local retrieval and vector stores.
- https://docs.llamaindex.ai/
- https://python.langchain.com/docs/
- https://docs.trychroma.com/
- https://qdrant.tech/documentation/
- https://github.com/facebookresearch/faiss
- https://github.com/lancedb/lancedb
- https://github.com/weaviate/weaviate
observability / traces
Open-source tracing and local observability for AI apps.