Building agents

40,024 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.

ecc

01

affaan-m/ECC

Plugin Claude Code

Bundles 78 skills, 58 commands, 70 agents, 1 MCP server · 7,474 tokens together

Harness-native ECC plugin for engineering teams - 71 agents, 311 skills, 97 legacy command shims, reusable hooks, rules, MCP conventions, and operator workflows for Claude Code plus adjacent agent harnesses.

not rated 288k +4.8k changed 13d ago A ✓ AI review tokens not measured original MIT

deepseek-ai/deepseek-harness

Skill Claude CodeCodex ✓ vendor

Use when creating, changing, or validating an agent preset or other Cordis composition for this harness, including deciding host versus preset placement and checking that an authored preset mounts.

not rated 261k +7.4k changed 1mo ago A Snyk: passSkillSpector: pass 41 tokens original MIT

chain-example

03

ultraworkers/claw-code

Skill Claude CodeCodex

Example bundled skill that chains to other skills.

not rated 195k +169 yesterday A 11 tokens original MIT

claude-api

04

anthropics/skills

Skill Claude CodeCodex ✓ vendor

Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration. TRIGGER — read BEFORE opening the target file; don't skip because it "looks like a one-liner" — whenever: the prompt names Claude/Anthropic in any form (Claude…

not rated 184k +1.5k changed 15d ago A Socket: passSnyk: passSkillSpector: warn 294 tokens

engine_mcp

05

flutter/flutter

MCP server Gemini CLI

MCP server "enginemcp" as configured in flutter/flutter. Launched with dart run tools/mcp/bin/main.dart.

not rated 180k +92 yesterday A tokens not measured original BSD-3-Clause

plugin-dev

06

anthropics/claude-code

Plugin Claude Code ✓ vendor

Bundles 7 skills, 1 command, 3 agents · 645 tokens together

Comprehensive toolkit for developing Claude Code plugins. Includes 7 expert skills covering hooks, MCP integration, commands, agents, and best practices. AI-assisted plugin creation and validation.

not rated 153k +1.0k yesterday A tokens not measured

skill-creator

08

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 108k +606 today A Snyk: passSkillSpector: warn 46 tokens original Apache-2.0

orchestration

09

stablyai/orca

Skill Claude CodeCodex

Coordinate supervised Orca workers: threaded messages, blocking ask/reply, task dispatch, workerdone/escalation waits, task DAGs, decision gates, coordinator loops, and decomposing work across agents. Use orca-cli for full ownership handoffs — "hand off", "handoff", "handover", "give this to another agent", "another…

not rated 105k +8.3k changed 1mo ago A Socket: passSnyk: passSkillSpector: pass 118 tokens original MIT

mcp-docs

10

modelcontextprotocol/servers

MCP server Claude CodeCodexCursor +2 ✓ vendor

The MCP documentation itself, served as an MCP server: lets the agent search the protocol spec and guides. Remote server at modelcontextprotocol.io.

not rated 92k +191 today A tokens not measured

agent-builder

12

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 79k +372 26d ago A ✓ AI review Snyk: passSkillSpector: pass 125 tokens original MIT

ruflo marketplace

13

ruvnet/ruflo

Plugin Claude Code

Lists 1 plugin

RuFlo Marketplace: Claude Code native agents, swarms, workers, and MCP tools for continuous software engineering.

not rated 79k +2.5k changed yesterday A tokens not measured original MIT

skill-creator

14

unslothai/unsloth

Skill Claude Code

Create a reusable skill when the user wants Unsloth to learn a repeatable workflow or set of instructions.

not rated 79k +296 changed 1mo ago A 26 tokens original Apache-2.0

OpenBB-finance/OpenBB

Skill Claude CodeCodex

This guide covers installation, configuration, authentication, tool discovery, prompt management, and client integration for openbb-mcp-server.

not rated 74k changed 25d ago A ✓ AI review SkillSpector: warn 31 tokens

claude-api

16

asgeirtj/system_prompts_leaks

Skill Claude CodeCodex

Reference for the Claude API / Anthropic SDK — model ids, pricing, params, streaming, tool use, MCP, agents, caching, token counting, model migration. TRIGGER — read BEFORE opening the target file; don't skip because it "looks like a one-liner" — whenever: the prompt names Claude/Anthropic in any form (Claude…

not rated 70k +288 changed yesterday A ✓ AI review Snyk: passSkillSpector: warn 294 tokens original CC0-1.0

multi-agent-design

17

bojieli/ai-agent-book

Skill Claude CodeCodex

A guide to deciding when several AI agents should work together and how they should share tasks, context, and files. It compares peer, manager-led, and decentralised arrangements and explains common coordination failures.

not rated 56k +916 16d ago A 126 tokens original Apache-2.0

skill-creator

18

CherryHQ/cherry-studio

Skill Claude CodeCodex

Create, edit, evaluate, and optimize skills, including benchmarking and description tuning for better triggering.

not rated 53k +219 changed 4d ago A SkillSpector: warn 23 tokens AGPL-3.0

convert-web-app

19

tldraw/tldraw

Skill Claude Code

This skill should be used when the user asks to "add MCP App support to my web app", "turn my web app into a hybrid MCP App", "make my web page work as an MCP App too", "wrap my existing UI as an MCP App", "convert iframe embed to MCP App", "turn my SPA into an MCP App", or needs to add MCP App support to an existing…

not rated 51k +102 today A SkillSpector: warn 115 tokens

skill-creator

20

HKUDS/nanobot

Skill Claude CodeCodex needs its repo

Create, update, or package agent skills.

not rated 49k +180 changed 9d ago A Snyk: passSkillSpector: warn 13 tokens original MIT

skill-creator

22

zhayujie/CowAgent

Skill Claude CodeCodex

Create, install, or update skills in the workspace. Use when (1) installing a skill from a URL or remote source, (2) creating a new skill from scratch, (3) updating or restructuring existing skills. Always use this skill for any skill installation or creation task.

not rated 48k +107 today A ✓ AI review Snyk: failSkillSpector: warn 61 tokens original MIT

codebase-memory-mcp

23

DeusData/codebase-memory-mcp

MCP server Claude CodeCodexCursor +2

Codebase knowledge graph for AI agents — 159 languages, sub-ms queries, 99% fewer tokens. Runs locally from the codebase-memory-mcp npm package.

not rated 47k +547 yesterday A Socket: warn tokens not measured original MIT

gh-skill

24

cli/cli

Skill Claude CodeCodex

Manage agent skills with gh skill. Use this skill to discover, preview, install, update, and publish Agent Skills so an agent can self-manage the skills available in its environment.

not rated 47k +44 today A Snyk: warnSkillSpector: pass 41 tokens original MIT

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