VT Code: Open-Source Coding Agent

Primary Purpose

Command-line AI coding agent with emphasis on security, multi-provider support, and sophisticated code understanding. Mac and Linux only.

Key Features

Security & Safety - Multi-layered defense: tree-sitter-bash command validation and execution policies - OS-native sandboxing via macOS Seatbelt and Linux Landlock + seccomp - Configurable human-in-the-loop approval systems - Comprehensive audit trails for command execution

AI Provider Support GitHub Copilot, OpenAI, Anthropic, Google Gemini, DeepSeek, OpenRouter, Z.AI, Ollama, and more. Automatic failover.

Code Intelligence - LLM-native semantic analysis across multiple programming languages - Tree-sitter integration for syntax-aware code understanding - Smart refactoring and navigation tools

Integration Capabilities - Agent Client Protocol (ACP) for Zed IDE integration - Agent2Agent (A2A) Protocol for inter-agent communication - Anthropic Messages API compatibility layer - Open Responses specification conformance - Agent Trajectory Interchange Format (ATIF) for session export - MCP (Model Context Protocol) support

Advanced Features - OAuth 2.0 authentication with PKCE flows - Comprehensive skills system (open Agent Skills standard) - Lifecycle hooks for custom shell commands during agent events - Context management with token budget tracking - Rich terminal UI (Ratatui) - Ghostty VT PTY snapshots

Architecture

Modular Rust monorepo: - vtcode-core: Primary agent logic - vtcode-llm: LLM provider abstraction - vtcode-bash-runner: Secure command execution - vtcode-indexer: Code indexing and search - vtcode-tui: Terminal UI (Ratatui) - vtcode-acp: Agent Client Protocol - vtcode-auth: OAuth and credential management - vtcode-tools: Tool specifications and policies

Installation

Native installers, Cargo, Homebrew. MIT licensed. 589 stars.