Building agents

40,000 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.

heurist-network/heurist-agent-framework

Skill Claude CodeCodex

Admin operations for the Heurist Skill Marketplace. Use this skill when the user asks to add, ingest, approve, reject, remove, update, or list skills in the Heurist marketplace. Also triggers for checking upstream changes, updating external API dependencies, updating metrics (stars/downloads), re-ingesting skills, or…

not rated 826 +2 yesterday A 96 tokens

library-skills

386

tiangolo/library-skills

Skill Claude CodeCodex

Use Library Skills to discover, install, refresh, repair, check, and manage agent skills from installed packages.

not rated 823 +7 3d ago A SkillSpector: warn 26 tokens original MIT

vial

387

usehelix/helix

Skill Claude Code

Vial self-healing runtime — 8 protocols covering technical failures, behavioral failures, and agent role enforcement.

not rated 816 +2 4mo ago A SkillSpector: warn 25 tokens original MIT

build-connector

388

getomnico/omni

Skill Claude Code

Build a new connector for Omni workplace agents. Use when creating a new data source integration, scaffolding connector structure, exposing agent actions/tools/resources, or needing help with the connector SDK.

not rated 807 +1 changed 29d ago A SkillSpector: pass 41 tokens original Apache-2.0

unbrowse

389

unbrowse-ai/unbrowse

Skill Claude CodeCodex

Search and call websites through Unbrowse's hosted API or remote MCP, reuse indexed site tools, read pages, and learn missing routes in its cloud browser. Use for structured website tasks, and authenticated site access with Unbrowse.

not rated 806 +5 changed 6d ago A SkillSpector: pass 48 tokens original MIT

kody

390

kentcdodds/kody

Skill Claude CodeCodex

Install Kody as a remote MCP server, then use search / MCP tools and prefer kody execute --local when the CLI and Node are available. Use when the user mentions Kody, kody.codes, durable agent tasks, or wants to search/execute via Kody.

not rated 805 8d ago A 63 tokens

gentle-ai-worker

391

Gentleman-Programming/gentle-pi

Agent Claude Code

Scoped package-owned implementation writer for bounded non-SDD work. Edits code, runs focused tests, and returns review-ready evidence without committing.

not rated 804 changed 1mo ago A 33 tokens original MIT

fractal

393

plasma-ai/fractal

Plugin Claude Code

Bundles 4 skills · 63 tokens together

Hierarchical agent loops with recursive self-organization.

not rated 786 +4 changed 1mo ago A tokens not measured original Apache-2.0

yunshu0909/yunshu_skillshub

Skill Claude CodeCodex

A guided workflow for creating a personality document for Hermes or another conversational AI companion. It turns a rough character idea into a first-person description covering identity, appearance, personality, background, relationship, and speaking style.

not rated 784 +2 changed 18d ago A SkillSpector: pass 212 tokens original MIT

brand-building-skills

395

arnabbagxd/Brand-building-skills

Plugin Claude Code

Bundles 29 skills · 3,589 tokens together

29 brand building and marketing skills: brand strategy, naming, identity, voice, positioning, messaging, audit, guidelines, launch, rebranding, personal brand, manifesto, architecture, measurement, packaging, DTC marketing, B2B brand marketing, brand partnerships, UGC, ASO, WhatsApp marketing, email marketing…

not rated 784 +22 4mo ago A tokens not measured original MIT

agent-team-manager

396

countbot-ai/CountBot

Skill Claude CodeCodex

A command-line manager for teams of AI agents, where each agent has a role and the team can use different workflows or models.

not rated 782 +2 15d ago A SkillSpector: pass 76 tokens original MIT

self-improving-agent

397

pskoett/self-improving-agent

Skill Claude CodeCodex

Captures and maintains learnings, errors, and corrections. Use when a command fails, the user corrects an assumption, a capability is missing, knowledge is outdated, or a better approach is found. Review relevant saved guidance before major tasks, reuse, and promotion; revalidate it according to what could change and…

not rated 779 +7 changed 2d ago A 72 tokens

agy

398

keli-wen/agy-staff

Plugin Claude Code

Bundles 14 skills · 1,168 tokens together

Delegate work to Google's Antigravity CLI (agy) with fast Gemini access - five personas: staffer (general), researcher, reviewer (code and plans), implementer, ask.

not rated 776 +24 changed 21d ago A tokens not measured original MIT

agent-development

400

divar-ir/ai-doc-gen

Cursor rule Cursor

Guidelines for developing pydantic-ai agents, tools, and handlers.

not rated 768 3mo ago A 0 tokens original MIT

agentacct-workflow

401

mikehasa/agentacct

Skill Claude CodeCodex

Use when working in a repo with agentacct MCP configured, or when asked to track coding-agent work, smoke-test agentacct integrations, or report objective AI-agent task evidence.

not rated 756 +15 changed 1mo ago A SkillSpector: pass 40 tokens original MIT

kiro

403

jasonkneen/kiro

Plugin Claude Code

Bundles 8 skills, 2 commands · 296 tokens together

Spec-driven development methodology for Claude Code. Provides skills for requirements engineering (EARS format), design documentation, task breakdown, AI prompting strategies, quality assurance, and troubleshooting.

not rated 755 +1 9mo ago A tokens not measured original MIT

evolve-agent-skills

404

eunomia-bpf/agentsight

Skill Codex

Analyze Codex, Claude, AgentSight, or other agent trajectories to find repeated failure modes and turn them into evidence-gated skill improvements. Use when the user asks why agents keep making the same mistakes, whether a skill should change, how to learn from many sessions, how to convert repeated workflows into…

not rated 754 +6 2d ago A SkillSpector: warn 144 tokens original MIT

skill-creator

405

ClawRunr/JavaClaw

Skill Claude CodeCodex

Create new skills, modify and improve existing skills for JavaClaw. Use when users want to create a skill from scratch, edit or improve an existing skill, or refine a skill's description so it triggers more reliably. Also use when a user asks to "turn this workflow into a skill", "save these instructions as a skill"…

not rated 753 +1 yesterday A SkillSpector: pass 80 tokens LGPL-3.0

agent-ruler-openmcp

406

LSTM-Kirigaya/openmcp-client

Skill Codex

Guidance for installing, upgrading, verifying, and using the npm package @agent-ruler/openmcp and its openmcp CLI. Use when a user asks how to install OpenMCP from npm, start or diagnose the Gateway, use OpenMCP CLI commands, configure skills through SKILLPATH, troubleshoot global installs, or publish/test the CLI…

not rated 751 4mo ago A SkillSpector: warn 80 tokens original Apache-2.0

learning-systems

408

joelhooks/swarm-tools

Skill Claude CodeCodex

Implicit feedback scoring, confidence decay, and anti-pattern detection. Use when understanding how the swarm plugin learns from outcomes, implementing learning loops, or debugging why patterns are being promoted or deprecated. Unique to opencode-swarm-plugin.

not rated 748 2mo ago A 49 tokens

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: