Building agents

38,263 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.

lu-mcp-server

3121

rafapra3008/cervellaswarm

MCP server Claude CodeCodexCursor +2

MCP server for Lingua Universale protocol verification -- verify AI agent communication with session types. Runs locally from the lu-mcp-server Python package.

not rated 10 28d ago A tokens not measured original Apache-2.0

swiftindex

3122

DesignPipe/exfig

MCP server Claude CodeCodexCursor +2

MCP server "swiftindex" as configured in DesignPipe/exfig. Launched with ./bin/mise exec -- swiftindex serve.

not rated 10 1mo ago A tokens not measured original MIT

create-rule-agent

3124

usrrname/cursorrules

Cursor rule Cursor

This rule is responsible for creating and updating Cursor rules. Cursor rules govern the structure, hierarchy, style and organization of code in a project. This rule should be invoked in Agent mode when: 1. a user wants to create a new cursor rule, 2. a user wants to update or change an existing rule, 3. user wants…

not rated 10 5mo ago A 3,429 tokens original ISC

chain-of-truth

3125

kasfulk/chain-of-truth

Skill Claude CodeCodex

Chain of Truth (CoT) workflow for AI-assisted software development. Validated artifacts as the Source of Truth (SoT) — not prompts. 7 phases: SRS → Product Structure (IA + Design System + User Flows) → HiFi Prototype → Data Model → UCIC → Implementation → Testing. Use when: building a new feature/application with AI…

not rated 10 2mo ago A 173 tokens

arcayne/agentic-delivery-playbook

Skill Claude CodeCodex

Coding Agent Preflight for non-trivial coding work in Pi: classify direct/lightweight/full, lock goal/non-goals/risks/evidence, require approval when needed, and coordinate Pi goals/subagents with truthful routing. Use when ambiguity, risk, scope, or reviewability justifies a delivery contract; skip clear small direct…

not rated 10 2mo ago A 77 tokens original MIT

symphony

3127

kwanpham2195/symphony-go

Skill Claude CodeCodex

Set up, configure, run, and troubleshoot symphony-go — an autonomous agent orchestrator that polls Linear issues and runs Codex sessions. Use when the user asks to install symphony, create a WORKFLOW.md, configure Linear integration, start the orchestrator, debug stuck agents, fix failing hooks, tune retry/backoff…

not rated 10 3mo ago A 88 tokens original MIT

lean-ai-prd-team-pro

3128

sky791016/lean-ai-dev-team

Skill Claude CodeCodex

A coordinated team of ten agents for planning, auditing, designing, building, integrating, and assessing AI products using the Lean AI Methodology.

not rated 10 4mo ago A 121 tokens

leerie

3129

enricai/leerie

Plugin Claude Code

Bundles 2 skills, 2 commands · 257 tokens together

Graph-engineered task driver for Claude Code. Classifies a task, decomposes it into a dependency graph of granular subtasks, topo-sorts it into waves, and executes each node in an isolated git worktree under an evidence-gated implement/validate loop. Runs entirely on the Claude Code CLI/subscription via claude -p wor.

not rated 10 changed today A tokens not measured original MIT

sequential-thinking

3130

Kalapaja/Kalatori

MCP server Claude CodeCodexCursor +2

One of 5 in .mcp.json

Adds a structured step-by-step reasoning tool the agent can call to break a problem into revisable thoughts. Runs locally from the @modelcontextprotocol/server-sequential-thinking npm package.

not rated 10 2d ago A tokens not measured GPL-3.0

cline-sdk

3131

cline/sdk-skill

Skill Claude CodeCodex

Comprehensive Cline SDK skill for building AI agents. Covers the direct Agent runtime, ClineCore sessions, custom tools, plugins, events, LLM providers, scheduling, multi-agent teams, and production deployment. Use for any task involving @cline/sdk or its sub-packages.

not rated 10 2mo ago A Socket: passSnyk: warn 60 tokens original Apache-2.0

context-compression

3133

ils15/pantheon-legacy

Skill Claude Code

Level 2 — Pantheon-native context compression with priority scoring, semantic summarization, downstream-aware compression, budget allocation, and cross-references.

not rated 10 yesterday A SkillSpector: warn 32 tokens original MIT

artifact-creation

3134

hutchic/.cursor

Cursor rule Cursor

Decision framework for creating artifacts. Use when analyzing patterns to determine whether to create a rule, skill, command, or subagent, and how to organize it.

not rated 10 4mo ago A 1,718 tokens

claude-agent-sdk

3135

btgaskin/claude-agent-sdk-skill

Plugin Claude Code

Bundles 1 skill · 102 tokens together

Claude Code skill for building production AI agents with the Claude Agent SDK. Covers Python and TypeScript patterns for query(), ClaudeSDKClient, custom tools, hooks, subagents, and multi-agent orchestration.

not rated 10 7mo ago A tokens not measured original MIT

skill-creator

3136

alexfazio/cc-skills

Skill Claude CodeCodex

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 Claude's capabilities with specialized knowledge, workflows, or tool integrations.

not rated 10 8mo ago A 45 tokens

predicate

3137

nrdxp/predicate

Plugin Claude Code

Bundles 34 skills · 3,043 tokens together

Reusable agent rulesets (rules), skills, and workflows for agentic coding assistants.

not rated 10 15d ago A tokens not measured original MIT

always-on-agent-safety

3138

curiositech/windags-skills

Skill Claude Code

Safety, privacy, cost management, and frank advice for building always-on AI agents with episodic memory. Covers data hygiene, privacy risk surfaces, runaway cost prevention, scope creep, psychological effects of persistent AI companions, and responsible deployment patterns. This is the skill that tells you what can…

not rated 10 1mo ago A 166 tokens

efficient-tool-usage

3139

JoshJancula/ralph

Cursor rule Cursor

Redirect large command output to Ralph artifact logs; report compact exit status before details.

not rated 10 yesterday A 451 tokens original MIT

ag2-network-governance

3140

ag2ai/ag2-skills

Skill Claude CodeCodex

Govern an AG2 multi-agent network — identity (Passport, Resume), per-agent Rule with two top-level blocks access (AccessBlock) and limits (LimitsBlock, which nests RateBlock + InboxBlock), the swappable HubArbiter / RuleBasedArbiter access-&-routing seam, AuthAdapter / AuthRegistry registration, channel-level…

not rated 10 1mo ago A 264 tokens original Apache-2.0

agent-loop-update

3141

ciroaurelio22/AgentLoop

Skill Claude CodeCodex needs its repo

Update Agent Loop in the current repository from the official GitHub kit. Use when the user asks to update, upgrade, or refresh agent-loop.

not rated 10 2mo ago A 33 tokens original MIT

skill-creator

3142

KunCheng-He/kk-ai

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 10 21d ago A 64 tokens

mastra-system-check

3143

goldk3y/mastra-system-check

Skill Claude CodeCodex

Comprehensive system check for Mastra AI agent projects. Validates configuration, agents, workflows, memory, tools, prompts, and security across 66 rules organized by priority. Use when setting up new projects, debugging issues, reviewing code, or preparing for production deployment.

not rated 10 8mo ago A 59 tokens original MIT

codex

3144

iptag/CC

Skill Claude CodeCodex

Execute Codex CLI for code analysis, refactoring, and automated code changes. Use when you need to delegate complex code tasks to Codex AI with file references (@syntax) and structured output.

not rated 10 9mo ago A 42 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: