Best agent skills for building AI agents

Reverse engineer native, managed, Electron/JavaScript, packaged, firmware, and browser targets with REA, and build agent environments (AgentEnv bundles) of…

• Largest repository here (377,435 stars)
• Active in the last 30 days
• Open source (MIT)

★ 377.4KLast active Oct 24, 2026Claude Code, Claude apps, Codex, Cursor +6

Best practices for building agents and agentic applications with Plano, including configuration, routing, orchestration, guardrails, observability, and…

• Repository has 7.1K stars
• Active in the last 30 days
• Open source (Apache-2.0)

★ 7.1KLast active Oct 24, 2026Claude Code, Claude apps, Codex, Cursor +6

Check for available upgrades to the pi coding agent framework by comparing the current `@earendil-works/pi-*` or legacy `@mariozechner/pi-*` version in…

• Active in the last 30 days
• Open source (MIT)
• Ships helper scripts

★ 103Last active Oct 22, 2026Claude Code, Claude apps, Codex, Cursor +6

Use 1000+ external apps via Composio - either directly through the CLI or by building AI agents and apps with the SDK

• Repository has 1K stars
• Open source (Apache-2.0)

★ 1KLast active Aug 31, 2026Claude Code, Claude apps, Codex, Cursor +6

Create and manage Kibana Agent Builder agents and custom tools.

• Published by the vendor
• Open source (Apache-2.0)

★ 600Last active Sep 4, 2026Claude Code, Claude apps, Codex, Cursor +6

This skill should be used when building agent evaluation systems: deterministic checks, regression suites, multi-dimensional rubrics, quality gates…

• Repository has 18.2K stars
• Open source (MIT)
• Ships helper scripts

★ 18.2KLast active Jun 29, 2026Claude Code, Claude apps, Codex, Cursor +6

Guided workflow for building custom AI agents using the OpenHands Software Agent SDK.

• Active in the last 30 days
• Open source (MIT)

★ 173Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

Reference skill for the OpenHands Software Agent SDK - the Python framework for building AI agents that write software.

• Active in the last 30 days
• Open source (MIT)

★ 173Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

Build AI agents with Pydantic AI (Python) and Claude SDK (Node.js)

• Open source (MIT)

★ 711Last active Sep 8, 2026Claude Code, Claude apps, Codex, Cursor +6

Build AI agents on Cloudflare Workers using the Agents SDK.

• Active in the last 30 days
• Open source (MIT)

★ 883Last active Oct 23, 2026Claude Code, Claude apps, Codex, Cursor +6

Use this skill whenever the user is working with the Pydantic AI framework — including building AI agents, defining structured outputs with Pydantic models…

• Active in the last 30 days
• Open source (Apache-2.0)

★ 381Last active Oct 4, 2026Claude Code, Claude apps, Codex, Cursor +6

Build persistent agents on Azure AI Foundry using the Microsoft Agent Framework Python SDK.

• Repository has 48.4K stars
• Active in the last 30 days
• Open source (MIT)

★ 48.4KLast active Oct 24, 2026Claude Code, Claude apps, Codex, Cursor +6

AI agent development workflow for building autonomous agents, multi-agent systems, and agent orchestration with CrewAI, LangGraph, and custom agents.

• Repository has 48.4K stars
• Active in the last 30 days
• Open source (MIT)

★ 48.4KLast active Oct 24, 2026Claude Code, Claude apps, Codex, Cursor +6

Building applications ON Claude - the Anthropic API and Claude Agent SDK.

• Active in the last 30 days
• Open source (MIT)
• Ships helper scripts

★ 75Last active Oct 14, 2026Claude Code

Use when designing, implementing, or debugging complex agentic workflows using state machine patterns.

• Active in the last 30 days
• Open source (Apache-2.0)

★ 28Last active Oct 24, 2026Claude Code, Claude apps, Codex, Cursor +6