AI Agents Library

Production-Ready AI Agent Prompts & Claude Code Skills

A curated collection of 40+ Custom GPT agents and 50 Claude Code skills optimized for ChatGPT, Claude Projects, Codex, and Gemini platforms.

Quick Start • Custom GPTs • Claude Skills • Frameworks • Contributing

---

Table of Contents

• What's Inside
• Repository Architecture
• Custom GPT Agents
• Claude Code Skills
• Frameworks
• Quick Start
• Prompt Engineering Framework
• Platform Support
• Contributing
• License

What's Inside

This repository contains 40+ specialized AI agents and 50 Claude Code skills organized by domain, each optimized for specific tasks and workflows. All agents follow a consistent template structure with platform-specific optimizations.

graph TB
    subgraph "AI Agents Library"
        A[Custom GPT Agents<br/>40+ Specialized Agents] --> A1[Education]
        A --> A2[Lifestyle]
        A --> A3[Productivity]
        A --> A4[Programming]
        A --> A5[Research & Analysis]
        A --> A6[Writing]

        B[Claude Code Skills<br/>50 Development Skills] --> B1[Software Development]
        B --> B2[AI/ML Engineering]
        B --> B3[DevOps & Platform]
        B --> B4[Quality & Testing]
        B --> B5[Documentation]

        C[Frameworks<br/>Copy-Paste Ready] --> C1[Claude Code Kit]
        C --> C2[Codex Kit]
        C --> C3[Gemini Kit]

        D[Master Template v3.5<br/>13-Section Framework] --> A
        D --> B
        D --> C
    end

    style A fill:#4A90E2
    style B fill:#9B59B6
    style C fill:#E67E22
    style D fill:#27AE60

What Makes This Different?

• Production-Ready: Every agent tested and optimized for real-world use
• Multi-Platform: Works across ChatGPT, Claude, Codex, and Gemini
• Systematic Framework: Master Template v3.5 with 13 standardized sections
• Character-Optimized: Custom GPT agents under 8000 char limit
• Curated Resources: JSON source files with 60+ curated references per domain
• Copy-Paste Kits: Complete .claude/ and .codex/ workspace templates

Repository Architecture

graph LR
    subgraph "Repository Structure"
        A[custom-gpt/] --> A1[education/]
        A --> A2[lifestyle/]
        A --> A3[productivity/]
        A --> A4[programming/]
        A --> A5[research-n-analysis/]
        A --> A6[writing/]

        B[frameworks/] --> B1[claude-code-kit/<br/>50 Skills]
        B --> B2[codex-kit/<br/>Router System]
        B --> B3[gemini-kit/<br/>Router System]

        C[Each Agent] --> C1[01_agent-name.md<br/>Main Prompt]
        C --> C2[02_sources.json<br/>Curated Resources]
        C --> C3[agent-name.yaml<br/>Configuration]
    end

    style A fill:#4A90E2,color:#fff
    style B fill:#9B59B6,color:#fff
    style C fill:#27AE60,color:#fff

Three-File Agent Pattern

Every agent follows a consistent structure:

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

Custom GPT Agents

40+ 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

See full agent catalog →

Claude Code Skills

50 production-ready skills for Claude Code, organized into domain-specific categories.

graph LR
    subgraph "Claude Code Skills (50)"
        A[Software Development] --> A1[Frontend<br/>Backend<br/>Architecture]
        B[AI/ML Engineering] --> B1[LLM Engineering<br/>Agents<br/>Data Science]
        C[DevOps & Platform] --> C1[Database<br/>Platform<br/>Document Automation]
        D[Quality & Testing] --> D1[Code Review<br/>Testing<br/>Debugging<br/>Refactoring]
        E[Documentation] --> E1[API Design<br/>Codebase Audit<br/>Technical Writing]
    end

    style A fill:#3498DB
    style B fill:#9B59B6
    style C fill:#E67E22
    style D fill:#2ECC71
    style E fill:#34495E,color:#fff

Installation

Copy the entire .claude/skills/ directory to your Claude Code workspace:

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

# Copy skills to Claude Code
cp -r frameworks/claude-code-kit/initial-setup/skills ~/.config/claude-code/skills/

See full skills catalog →

Frameworks

Three complete development kits for different AI platforms:

Claude Code Kit

Complete .claude/ workspace with 50 skills covering software development, AI/ML, DevOps, and quality engineering.

Copy-paste ready: Drop the initial-setup/ directory into your Claude Code workspace.

Codex Kit

Router-based system for Codex CLI with intelligent agent dispatch and workflow orchestration.

Gemini Kit

Gemini-optimized router system with platform-specific adaptations.

See frameworks documentation →

Quick Start

Using a Custom GPT Agent

1. Browse the agent catalog 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 Claude Code Skills

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

# Install all skills
cp -r frameworks/claude-code-kit/initial-setup/skills ~/.config/claude-code/skills/

# Verify installation
ls ~/.config/claude-code/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

Prompt Engineering Framework

All agents built on Master Template v3.5 with 13 standardized sections:

1. VARS - Configuration variables
2. IDENTITY - Role definition
3. CONTEXT - Background knowledge
4. CONSTRAINTS - Boundaries and requirements
5. PRECEDENCE & SAFETY - Security protocols
6. OUTPUT CONTRACT - Format specifications
7. FRAMEWORKS - Reasoning frameworks
8. WORKFLOW - Execution process
9. ERROR RECOVERY - Edge case handling
10. TOOLS & UI - Tool usage guidelines
11. MEMORY - State management
12. COMMANDS - Slash commands
13. EXEMPLARS - Real-world examples

Template Features

graph TB
    A[Master Template v3.5] --> B[4 Deployment Modes]