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LLM Tool Integration

Overview

This document provides an overview of how the LLM (Language Model) and Tool System work together to create a functional AI coding assistant.

Core Concept: Agent Coordination

The system uses an agent coordination pattern with three main components:

  • LLM acts as the brain - decides what actions to take
  • Tools act as the hands - execute the actual operations
  • Agent coordinates - manages the conversation and execution loop

High-Level Architecture

User Request
     ↓
┌─────────────────┐
│   Agent Layer   │ ← Coordinates LLM + tools
│  - Executor     │   Builds context
│  - Context      │   Manages loop
└─────────────────┘
     ↓
┌─────────────────┐
│   LLM Layer     │ ← Makes decisions
│  - Client       │   Returns tool calls
│  - Streaming    │   Processes results
└─────────────────┘
     ↓
┌─────────────────┐
│  Tool Layer     │ ← Executes actions
│  - Runner       │   Handles permissions
│  - Registry     │   Returns results
└─────────────────┘
     ↓
Back to LLM for synthesis

Key Components

Agent Executor (src/agent/executor.ts)

Core execution engine that:

  • Manages the LLM + tool calling loop
  • Handles both interactive and non-interactive modes
  • Coordinates streaming responses and tool execution
  • Manages conversation length through auto-compaction (see User Interface for details)

Session Management (src/sessions/)

  • Types: Defines message formats and OpenAI API compliance
  • Validation: Ensures proper message ordering for tool calls

Permission System (src/permissions/)

  • Manages security controls for file system and bash operations
  • For detailed permission models, approval modes, and configuration, see Permission System

Tool Executor (src/agent/toolExecutor.ts)

  • Handles tool execution with permission integration
  • Manages async permission requests and retry logic
  • For detailed permission workflow, see Permission System

Execution Flow

  1. User Input → Agent receives prompt
  2. Context Building → System message + session history + project context → LLM
  3. LLM Response → Streaming text OR tool calls
  4. Tool Execution → Permission check → Execute → Return results
  5. Loop Continuation → Results fed back to LLM → Final response

Project Context Integration

The system automatically incorporates project-specific context through the AGENTS.md file:

  • Automatic Reading: System reads AGENTS.md file from project root
  • Context Integration: Project context is included in system prompts for LLM
  • Persistent Memory: AGENTS.md provides long-term project memory across sessions
  • Customizable: Users can update AGENTS.md to provide project-specific information

Auto-Compaction

The system automatically manages conversation length when approaching token limits. For detailed information about auto-compaction triggers, manual commands, and usage, see User Interface.

Key Features

  • Streaming: Real-time LLM responses and progressive tool results
  • Permission Integration: Multi-layer security with async approval flow (see Permission System)
  • Auto-Compaction: Automatic token management for long conversations (see User Interface)
  • Dual Mode: Interactive UI and non-interactive CLI support

Related Documentation