agentv2

AgentV2 - Production-Ready Python Agent Framework

A modular, production-ready Python framework for building autonomous AI agents that can plan, validate, and execute complex tasks using LLMs and custom tools.

📦 Install: pip install agentv2 | 🔗 PyPI: pypi.org/project/agentv2

🎯 What is This Project?

AgentV2 is a deterministic, production-grade agent framework that separates concerns into distinct components:

• Planner: Generates structured todo lists from natural language tasks
• Validator: Ensures todos meet quality and domain-specific requirements
• Executor: Deterministically executes todos one at a time using LLM-guided actions
• Agent: High-level orchestrator that coordinates the entire workflow
• Session Memory: Lightweight caching and context management for conversational agents

The framework enforces strict architectural boundaries, ensuring predictable execution, no silent failures, and deterministic outcomes.

🚀 Quick Start

Installation

Install from PyPI (Recommended):

pip install agentv2

📦 Package: agentv2 on PyPI

Or install from source (Development):

# Clone the repository
git clone <repository-url>
cd AgentV2

# Install in editable mode
pip install -e .

# Or install with development dependencies
pip install -e ".[dev]"

Environment Setup

Create a .env file:

API_KEY=your_api_key_here

Basic Usage

Example 1: Simple Task Execution

from agentv2.src.agent import Agent
import uuid

# Define tools
def add(a: int, b: int) -> int:
    return a + b

tools = {"add": add}

# Create agent
agent = Agent(
    model="groq/openai/gpt-oss-120b",
    system_prompt="You are an autonomous execution agent.",
    session_id=f"session-{uuid.uuid4().hex[:8]}",
    tools=tools,
)

# Run a task
result = agent.run("Add 5 and 10, then multiply by 2")
print(result.final_reply)

Example 2: Chat Agent with Web Search

from agentv2.src.agent import Agent
from ddgs import DDGS
import uuid

def web_search(query: str) -> str:
    with DDGS() as ddgs:
        results = list(ddgs.text(query, max_results=5))
    return format_results(results)

tools = {"web_search": web_search}

agent = Agent(
    model="groq/openai/gpt-oss-120b",
    system_prompt="You are a helpful assistant with web search.",
    session_id=f"chat-{uuid.uuid4().hex[:8]}",
    tools=tools,
)

# Use chat API (with session memory)
reply = agent.chat("What's the latest news about AI?")
print(reply)

Example 3: File Operations Agent

from agentv2.src.agent import Agent
from pathlib import Path
import uuid

def read_file(path: str) -> str:
    return Path(path).read_text()

def write_file(path: str, content: str) -> str:
    Path(path).write_text(content)
    return f"Wrote {len(content)} bytes to {path}"

tools = {
    "read_file": read_file,
    "write_file": write_file,
}

agent = Agent(
    model="groq/openai/gpt-oss-120b",
    system_prompt="You are a file operations agent.",
    session_id=f"fileops-{uuid.uuid4().hex[:8]}",
    tools=tools,
    domain_validator=None,  # Disable domain validation for file ops
)

result = agent.run("Create a hello.py file that prints 'Hello, World!'")
print(result.final_reply)

🎨 Key Features

1. Deterministic Execution

• No unbounded loops
• Strict step limits per todo
• Predictable outcomes
• No silent failures

2. Session Memory

• Automatic caching of exact-match tasks
• Context injection across multiple turns
• Lightweight, token-efficient
• Session-based isolation

3. Strict Validation

• Base validation (action verbs, length, forbidden phrases)
• Domain-specific validation (backend/frontend/data)
• Quality scoring (0.0-1.0)
• Auto-rewrite on failure (bounded attempts)

4. Tool Sandboxing

• Tools provided as callables
• Validated before execution
• Exceptions propagate as RuntimeError
• Results stored in authoritative memory

5. Rich Logging

• Structured, box-formatted logs
• Clear visual separation
• Execution stats and progress tracking
• Error reporting with context

🔧 Architecture Constraints

The framework enforces strict boundaries:

• Planner decides todos - Executor never modifies the plan
• LLM proposes actions - Only via AgentState schema
• Memory is authoritative - Executor enforces all invariants
• No retries in Agent - Failures propagate immediately
• Tools are sandboxed - Validated and isolated
• Deterministic execution - Same input → same output

📁 Project Structure

AgentV2/
├── src/
│   ├── agent.py          # High-level orchestrator
│   ├── planner.py        # Todo generation
│   ├── executor.py        # Deterministic execution
│   └── session_store.py  # Session memory management
├── schemas/
│   ├── AgentMemory.py    # Authoritative memory state
│   ├── AgentState.py     # LLM action proposals
│   ├── TodoSchema.py     # Todo data models
│   └── SessionMemory.py  # Session context model
├── utils/
│   ├── llm.py            # LLM interface (LiteLLM)
│   ├── logger.py         # Rich logging utilities
│   ├── validators.py     # Todo validation & scoring
│   └── Prompts.py        # Prompt template loader
├── prompts/
│   ├── Agent.md          # Execution prompt
│   ├── Todo.md           # Planning prompt
│   ├── FinalReply.md     # Summarization prompt
│   └── TodoRewrite.md    # Rewrite prompt
├── main.py               # Example: Basic tools
├── main2.py             # Example: Chat agent
├── main3.py             # Example: File operations
└── README.md

💡 Use Cases

1. Task Automation

• Break down complex tasks into executable steps
• Execute multi-step workflows deterministically
• Handle file operations, API calls, data processing

2. Conversational Agents

• Chat interfaces with web search
• Context-aware responses
• Caching for repeated queries
• Session-based memory

3. Code Generation & File Operations

• Generate code files from descriptions
• Read and modify existing files
• Execute and test generated code
• Create full-stack applications

4. Data Processing Pipelines

• Extract, transform, and load data
• Validate and clean datasets
• Generate reports and summaries

5. API Integration Agents

• Interact with external APIs
• Process web search results
• Aggregate information from multiple sources

6. Development Assistants

• Generate boilerplate code
• Refactor existing codebases
• Write tests and documentation
• Debug and fix issues

🛠️ Customization

Adding Custom Tools

def my_custom_tool(param1: str, param2: int) -> str:
    """Tool description for the LLM."""
    # Your logic here
    return "result"

tools = {
    "my_custom_tool": my_custom_tool,
}

Custom Domain Validators

from agentv2.utils.validators import DomainTodoValidator

class MyDomainValidator(DomainTodoValidator):
    FORBIDDEN = ["forbidden_term1", "forbidden_term2"]
    
    def validate(self, todo: TodoItemInput) -> None:
        # Your validation logic
        pass

agent = Agent(
    ...,
    domain_validator=MyDomainValidator(),
)

Custom Prompts

Edit the markdown files in prompts/:

• Agent.md - Execution instructions
• Todo.md - Planning instructions
• FinalReply.md - Summarization instructions

📊 Execution Flow Details

Planning Phase

1. User provides task description
2. Planner generates TodoListInput using LLM
3. Validator checks base rules, domain rules, quality score
4. Auto-rewrite invalid todos (up to 2 attempts)
5. Return validated TodoList with UUIDs

Execution Phase

1. Executor iterates through todos sequentially
2. For each todo:
   • LLM proposes AgentState (think/tool/complete_todo/fail_todo/noop)
   • Validate JSON strictly
   • Apply action deterministically
   • Update AgentMemory (authoritative state)
   • Enforce step limits (MAX_STEPS_PER_TODO)
3. Continue until all todos complete or fail

Summarization Phase

1. Collect completed todos and final results
2. Generate natural language summary
3. Return final reply to user

🔒 Security & Safety

• Tool Sandboxing: Tools execute in controlled environment
• Input Validation: All LLM outputs validated with Pydantic
• Error Handling: No silent failures, all errors propagate
• Step Limits: Bounded execution prevents infinite loops
• Session Isolation: Each session_id has isolated memory

📝 Logging

The framework uses Rich for beautiful, structured logging:

• Box-formatted panels for clear separation
• Color-coded success/error/warning messages
• Execution stats tables
• Todo lists with status indicators
• Structured logs to files in logs/ directory

🏗️ Architecture & Logic

High-Level Flow

graph TD
    A[User Task] --> B[Agent.run]
    B --> C[Planner]
    C --> D[Generate Todos]
    D --> E[Validator]
    E --> F{Valid?}
    F -->|No| G[Auto-Rewrite]
    G --> E
    F -->|Yes| H[Executor]
    H --> I[Execute Todos]
    I --> J[LLM Proposes Action]
    J --> K{Action Type}
    K -->|tool| L[Execute Tool]
    K -->|complete_todo| M[Mark Complete]
    K -->|think| N[Update State]
    L --> O[Update Memory]
    M --> O
    N --> O
    O --> P{All Done?}
    P -->|No| I
    P -->|Yes| Q[Summarize]
    Q --> R[Final Reply]

Component Responsibilities

graph LR
    subgraph "Agent (Orchestrator)"
        A1[Task Input] --> A2[Plan]
        A2 --> A3[Validate]
        A3 --> A4[Execute]
        A4 --> A5[Summarize]
    end
    
    subgraph "Planner"
        P1[Task] --> P2[LLM Generate]
        P2 --> P3[TodoList]
    end
    
    subgraph "Validator"
        V1[TodoList] --> V2[Base Rules]
        V2 --> V3[Domain Rules]
        V3 --> V4[Quality Score]
        V4 --> V5{Pass?}
        V5 -->|No| V6[Rewrite]
        V6 --> V1
        V5 -->|Yes| V7[Validated]
    end
    
    subgraph "Executor"
        E1[TodoList] --> E2[Iterate Todos]
        E2 --> E3[LLM Action]
        E3 --> E4{Action}
        E4 -->|tool| E5[Call Tool]
        E4 -->|complete| E6[Mark Done]
        E4 -->|think| E7[Update State]
        E5 --> E8[Update Memory]
        E6 --> E8
        E7 --> E8
        E8 --> E9{Next?}
        E9 -->|Yes| E2
        E9 -->|No| E10[Done]
    end
    
    A2 --> P1
    A3 --> V1
    A4 --> E1
    V7 --> A4
    E10 --> A5

Session Memory Flow

sequenceDiagram
    participant U as User
    participant A as Agent
    participant S as SessionStore
    participant C as Cache
    
    U->>A: chat("What's the weather?")
    A->>S: get(session_id)
    S->>C: check_cache(normalized_task)
    alt Cache Hit
        C-->>A: cached_reply
        A-->>U: cached_reply (no LLM call)
    else Cache Miss
        A->>A: plan + execute
        A->>C: cache_reply(task, reply)
        A-->>U: final_reply
    end

🤝 Contributing

This is a production-ready framework with strict architectural constraints. When contributing:

1. Maintain separation of concerns (Planner/Executor/Agent)
2. Never add retry logic in Agent
3. Always validate LLM outputs
4. Keep execution deterministic
5. Add tests for new features

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built with LiteLLM for LLM abstraction
• Uses Rich for beautiful terminal output
• DuckDuckGo Search for web search capabilities

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Made With Hate and Love Because perfection isn't born out of love, it's forged in frustration, obsession, and an unrelenting pursuit of something better.