AI Agents Library

Production-Ready AI Agent Prompts & Skills

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A curated collection of 28 Custom GPT agents and 64 AI coding agent skills for ChatGPT, Claude Code, Codex CLI, and Gemini CLI.

Quick Start • Custom GPTs • Skills • Contributing

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What's Inside

This repository contains 28 specialized Custom GPT agents and 64 AI coding agent skills organized by domain. All agents follow a consistent template structure. All skills follow the Agent Skills specification.

What Makes This Different?

• Production-Ready: Every agent and skill tested for real-world use
• Multi-Platform: Custom GPTs for ChatGPT; skills for Claude Code, Codex CLI, and Gemini CLI
• 64 Domain Skills: Software, AI/ML, QA, DevOps, data, agents, and more
• Curated Resources: JSON source files with curated references per domain
• Copy-Paste Ready: Drop skills directly into your .claude/skills/ or .codex/skills/ workspace

Repository Architecture

AI-Agents-public/
├── custom-gpt/                    # 28 Custom GPT agents
│   ├── education/                 # Learning and tutoring
│   ├── lifestyle/                 # Health, fitness, entertainment
│   ├── productivity/              # Business and professional tools
│   ├── programming/               # Software development
│   ├── research-n-analysis/       # Strategy and consulting
│   └── writing/                   # Content creation
├── frameworks/
│   └── shared-skills/             # 64 AI coding agent skills
│       └── skills/
│           ├── ai-*/              # AI/ML skills (8)
│           ├── agents-*/          # Agent orchestration (6)
│           ├── software-*/        # Software engineering (13)
│           ├── qa-*/              # Quality & testing (13)
│           ├── dev-*/             # Developer tools (10)
│           └── ...                # Data, docs, ops, product
└── CONTRIBUTING.md

Custom GPT Agents

28 specialized agents optimized for ChatGPT Custom GPTs (8000 character limit).

Agent Categories

Education (3 agents)

• English Tutor - IELTS Writing Task 1 & 2 preparation with band score feedback
• UK Tax and Legal Adviser 2025 - UK tax, legal, and regulatory guidance (2025/26 tax year)
• Life in the UK 2025 - Citizenship test preparation with practice questions

Lifestyle (7 agents)

• Fitness Buddy - Personalized workout programming with progressive overload strategies
• DietGPT - Comprehensive nutrition planning with macro/micronutrient targets
• Sleep Coach - Sleep optimization with CBT-I techniques and environmental guidance
• ChildBridge - Child development expert with parenting strategies
• Pet Whisperer - Pet care covering nutrition, training, and species-specific needs
• ReelRecipe - Short-form video content strategist for TikTok, Instagram Reels, YouTube Shorts
• CineMatch - Movie recommendations with 66+ sources and 17 discovery commands

Productivity (5 agents)

• Prompt Engineer - Master template v3.5 with 4 deployment modes and platform-specific versions
• Product Coach - Product management with discovery, roadmapping, and prioritization frameworks
• The Negotiator - Principled negotiation with BATNA analysis and tactical empathy
• Contract Crusher - Legal contract analysis with risk identification and plain-English summaries
• SMMA - Social media marketing with campaign strategy and paid advertising tactics

Programming (5 agents)

• AI Agents Builder - OpenAI Assistants API, LangChain, CrewAI with multi-agent orchestration
• LLM Engineer - Fine-tuning, RAG architecture, embeddings, and production deployment
• Data Scientist - ML/AI with PyTorch, TensorFlow, XGBoost, and MLOps pipelines
• PRD Business Analyst - User stories, technical specifications, and API contracts
• SQL and DevOps Engineer - Database optimization, Kubernetes, Terraform, and observability

Research & Analysis (3 agents)

• AI Strategist - AI readiness assessments, use case identification, and governance frameworks
• Startup Consultant - Business model validation, fundraising strategy, and financial modeling
• Strategy Consultant - Porter's Five Forces, SWOT, PESTEL, and competitive positioning

Writing (2 agents)

• AI Text Humaniser - Transform AI content into natural writing while eliminating detection markers
• FAANG Resume Coach - ATS optimization, STAR stories, and behavioral interview preparation

Three-File Agent Pattern

Every Custom GPT agent follows a consistent structure:

AgentName/
├── 01_agent-name.md           # Main prompt file (<8000 chars)
├── 02_sources-agent-name.json # Curated web resources and references
└── agent-name.yaml            # Configuration (role, commands, constraints)

AI Coding Agent Skills

64 production-ready skills for Claude Code, Codex CLI, and Gemini CLI.

Installation

# Clone repository
git clone https://github.com/vasilyu1983/AI-Agents-public
cd AI-Agents-public

# Install to Claude Code workspace
cp -r frameworks/shared-skills/skills/ /path/to/your/repo/.claude/skills/

# Or for Codex CLI
cp -r frameworks/shared-skills/skills/ /path/to/your/repo/.codex/skills/

Skill Domains

See full skills catalog →

Quick Start

Using a Custom GPT Agent

1. Browse the agent catalog above to find an agent
2. Navigate to the agent folder (e.g., custom-gpt/productivity/Prompt Engineer/)
3. Copy content from 01_agent-name.md (guaranteed <8000 chars)
4. Create new Custom GPT in ChatGPT
5. Paste into Instructions field
6. Upload 02_sources-*.json as knowledge file (optional)

Installing AI Coding Agent Skills

# Clone repository
git clone https://github.com/vasilyu1983/AI-Agents-public

# Install all skills to Claude Code
cp -r frameworks/shared-skills/skills/ /path/to/your/repo/.claude/skills/

# Verify installation
ls /path/to/your/repo/.claude/skills/

Using with Claude Projects

1. Create new Claude Project
2. Add 01_agent-name.md as project knowledge
3. Add supplemental files (02_sources-*.json) if available
4. Reference in custom instructions

Contributing

We welcome contributions! See CONTRIBUTING.md for full guidelines.

Adding a New Agent

1. Fork the repository
2. Create three files following the pattern:
   • 01_agent-name.md (<8000 chars for Custom GPT)
   • 02_sources-agent-name.json (curated resources)
   • agent-name.yaml (configuration)
3. Test on target platform
4. Submit pull request

Adding a Skill

1. Create skill directory with SKILL.md
2. Add references/, data/, and assets/ as needed
3. Follow the Agent Skills specification
4. Submit pull request

License

MIT License - see LICENSE file for details.

All prompts, skills, and configurations are provided as-is for educational and commercial use.

Resources

Official Documentation

• Agent Skills Specification
• OpenAI Custom GPTs
• Claude Code Documentation

Community

• Issues: Report bugs or request features via GitHub Issues
• Discussions: Join conversations in GitHub Discussions
• Twitter: Follow for updates @vasilyu

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Production-ready since 2024

Custom GPTs • Skills • Contributing

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