Building agents

33,651 mods in this category, of every kind an agent can take. Each one carries what it costs per session, what the scan found, and whether it is the original.

skill-creator

01

anthropics/skills

Skill Claude CodeCodex ✓ vendor

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

not rated 174k +305 today A 64 tokens

analyzer

02

anthropics/skills

Agent ✓ vendor

Analyze blind comparison results to understand WHY the winner won and generate improvement suggestions.

not rated 174k +305 today A 0 tokens

comparator

03

anthropics/skills

Agent ✓ vendor

Compare two outputs WITHOUT knowing which skill produced them.

not rated 174k +305 today A 0 tokens

grader

04

anthropics/skills

Agent ✓ vendor

Evaluate expectations against an execution transcript and outputs.

not rated 174k +305 today A 0 tokens

huggingface/transformers

Instructions file GitHub Copilot ✓ vendor

Instructions for huggingface/transformers, covering copilot-instructions.md guide for hugging face transformers, core project structure, coding conventions for hugging face transformers, copying and inheritance and testing.

not rated 165k 4d ago A 773 tokens original Apache-2.0

Hook Development

06

anthropics/claude-code

Skill Claude CodeCodex ✓ vendor

This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDEPLUGINROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop…

not rated 144k +180 today A 117 tokens

Skill Development

07

anthropics/claude-code

Skill Claude CodeCodex ✓ vendor

This skill should be used when the user wants to "create a skill", "add a skill to plugin", "write a new skill", "improve skill description", "organize skill content", or needs guidance on skill structure, progressive disclosure, or skill development best practices for Claude Code plugins.

not rated 144k +180 today A 63 tokens

skill-creator

08

openai/codex

Skill Claude CodeCodex ✓ vendor

Create or update a Codex skill with appropriately scoped instructions and any needed supporting resources.

not rated 121k +530 today A 21 tokens original Apache-2.0

skill-creator

09

google-gemini/gemini-cli

Skill Claude CodeCodex ✓ vendor

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Gemini CLI's capabilities with specialized knowledge, workflows, or tool integrations.

not rated 107k +12 today A 46 tokens original Apache-2.0

planner

10

earendil-works/pi

Agent

Creates implementation plans from context and requirements.

not rated 101k +1.2k today A 9 tokens original MIT

reviewer

11

earendil-works/pi

Agent

Code review specialist for quality and security analysis.

not rated 101k +1.2k today A 11 tokens original MIT

scout

12

earendil-works/pi

Agent

Fast codebase recon that returns compressed context for handoff to other agents.

not rated 101k +1.2k today A 17 tokens original MIT

skill-creator

13

bytedance/deer-flow

Skill Claude CodeCodex ✓ vendor

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

not rated 81k +104 today A 64 tokens original MIT

analyzer

14

bytedance/deer-flow

Agent ✓ vendor

Analyze blind comparison results to understand WHY the winner won and generate improvement suggestions.

not rated 81k +104 today A 0 tokens original MIT

comparator

15

bytedance/deer-flow

Agent ✓ vendor

Compare two outputs WITHOUT knowing which skill produced them.

not rated 81k +104 today A 0 tokens original MIT

grader

16

bytedance/deer-flow

Agent ✓ vendor

Evaluate expectations against an execution transcript and outputs.

not rated 81k +104 today A 0 tokens original MIT

agent-builder

17

shareAI-lab/learn-claude-code

Skill Claude CodeCodex

Design and build AI agents for any domain. Use when users: (1) ask to "create an agent", "build an assistant", or "design an AI system" (2) want to understand agent architecture, agentic patterns, or autonomous AI (3) need help with capabilities, subagents, planning, or skill mechanisms (4) ask about Claude Code…

not rated 76k +172 8d ago A 125 tokens original MIT

mcp-builder

18

shareAI-lab/learn-claude-code

Skill Claude CodeCodex

Build MCP (Model Context Protocol) servers that give Claude new capabilities. Use when user wants to create an MCP server, add tools to Claude, or integrate external services.

not rated 76k +172 8d ago A 38 tokens original MIT

local-ai-agents

19

microsoft/ai-agents-for-beginners

Skill Claude CodeCodex ✓ vendor

Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…

not rated 74k +182 7d ago A 200 tokens original MIT

codegraph CLAUDE.md

21

colbymchenry/codegraph

Instructions file

Claude Code instructions for colbymchenry/codegraph, covering claude.md, project overview, build, test, run, single test file / pattern and architecture.

not rated 69k +401 changed yesterday C 10,633 tokens original MIT

orchestrator

22

openinterpreter/openinterpreter

Agent

Agent "orchestrator" from openinterpreter/openinterpreter, covering user updates spec, reviews and general guidelines.

not rated 68k +20 14d ago A 0 tokens copy · 100% Apache-2.0

plugin-creator

23

openinterpreter/openinterpreter

Skill Claude CodeCodex

Create and scaffold plugin directories for Codex with a required .codex-plugin/plugin.json, optional plugin folders/files, valid manifest defaults, and personal-marketplace entries by default. Use when Codex needs to create a new personal plugin, add optional plugin structure, generate or update marketplace entries…

not rated 68k +20 14d ago A 86 tokens copy · 98% Apache-2.0

create-skill

24

warpdotdev/warp

Skill Claude CodeCodex

Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance with variance analysis, or optimize a skill's description for better triggering accuracy.

not rated 65k +56 2d ago A 64 tokens AGPL-3.0

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: