Agent Building skills

Browse reusable Agent Skills, each with a clear purpose and practical guidance.

mcp-creator

Expert MCP (Model Context Protocol) server developer creating safe, performant, production-ready servers with proper security, error handling, and developer experience. Activate on 'create MCP', 'MCP server', 'build MCP', 'custom tool server', 'MCP development', 'Model Context Protocol'. NOT for using existing MCPs (just invoke them), general API development (use backend-architect), or skills/agents without external state (use skill-coach/agent-creator).

151 repo starsObserved in 3 repos

Agent Building

ai-engineer

Build production-ready LLM applications, advanced RAG systems, and intelligent agents. Implements vector search, multimodal AI, agent orchestration, and enterprise AI integrations. Use PROACTIVELY for LLM features, chatbots, AI agents, or AI-powered applications.

151 repo starsObserved in 2 repos

Agent Building

automatic-stateful-prompt-improver

Automatically intercepts and optimizes prompts using the prompt-learning MCP server. Learns from performance over time via embedding-indexed history. Uses APE, OPRO, DSPy patterns. Activate on "optimize prompt", "improve this prompt", "prompt engineering", or ANY complex task request. Requires prompt-learning MCP server. NOT for simple questions (just answer them), NOT for direct commands (just execute them), NOT for conversational responses (no optimization needed).

151 repo starsObserved in 2 repos

Agent Building

skill-architect

Design, create, audit, and improve Claude Agent Skills with expert-level progressive disclosure. Use when building new skills, reviewing existing skills, debugging activation failures, encoding domain expertise, or designing skills for subagent consumption. Activate on "create skill", "improve skill", "skill audit", "skill review", "activation debugging", "shibboleth", "progressive disclosure", "skill description". NOT for general Claude Code features, runtime debugging, non-skill coding, or MCP server implementation.

151 repo starsObserved in 2 repos

Agent Building

skill-coach

Guides creation of high-quality Agent Skills with domain expertise, anti-pattern detection, and progressive disclosure best practices. Activate on keywords: create skill, review skill, skill quality, skill best practices, skill anti-patterns, improve skill, skill audit. NOT for general coding advice, slash commands, MCP development, or non-skill Claude Code features.

151 repo starsObserved in 2 repos

Agent Building

skillful-subagent-creator

Creates Claude subagents equipped with curated skills for solving problems within DAG workflows. Use when designing a specialist subagent, selecting skills for a subagent, writing the 4-section subagent prompt, or wiring subagents into orchestration DAGs. Activate on "create subagent", "subagent with skills", "specialist agent", "agent DAG", "orchestrate agents", "skill-equipped agent". NOT for creating skills themselves (use skill-architect), general Claude Code usage, or single-agent prompting without skills.

151 repo starsObserved in 2 repos

Agent Building

extension-builder

Create, extend, convert, validate, and install Autohand Code extensions from a user description or an existing extension. Use for Autohand extension authoring, Pi or pi-mono extension and skill adaptation, extension package repair, contributed tools, agents, or Agent Skills, and changes that intentionally extend Autohand itself.

151 repo starsObserved in 1 repos

Agent Building

goal-writer

Help the user craft one or more well-specified `/goal` objectives for goal mode. Use when the user asks for help writing, refining, or improving goals, goal-mode objectives, completion contracts, autonomous run objectives, proof, boundaries, or stop rules.

151 repo starsObserved in 1 repos

Agent Building

output-contract-enforcer

Validates that a DAG node's output matches its declared JSON schema before passing to downstream nodes. The glue that makes multi-agent DAGs reliable. Use when checking output contract compliance, generating validation schemas from descriptions, or debugging contract mismatches between nodes. Activate on "validate output", "output contract", "schema validation", "contract mismatch", "output doesn't match". NOT for content quality assessment (use dag-quality), skill grading (use skill-grader), or general JSON schema work outside DAG context.

151 repo starsObserved in 1 repos

Agent Building

port-daddy

Multi-agent coordination daemon for coding agents. Use for deterministic port claims, session tracking, salvage, file claims, notes, pub/sub, tuple-space coordination, background fleets, and debugging multi-agent failures across Claude Code, Codex, Gemini CLI, Cursor, or Windsurf. NOT for production deploy orchestration, Docker or Kubernetes networking, or cloud service discovery.

151 repo starsObserved in 1 repos

Agent Building