Grok Build — xAI Coding Agent Harness with TUI

Introduction

Grok Build is an open-source coding agent harness developed by xAI (SpaceXAI). It provides a fullscreen, mouse-interactive terminal UI for running AI-powered coding workflows, with an extensible plugin system for custom tooling and integrations.

What Grok Build Does

• Provides a fullscreen TUI for interactive agentic coding sessions
• Supports mouse interactions for navigating code, diffs, and file trees
• Offers an extensible architecture for adding custom tools and plugins
• Manages multi-file editing workflows with context-aware suggestions
• Integrates with multiple LLM providers for code generation and review

Architecture Overview

Grok Build is written in Rust for performance and reliability. It uses a modular harness architecture where the core event loop manages terminal rendering, input handling, and agent orchestration. The plugin system allows extending capabilities without modifying the core binary.

Self-Hosting & Configuration

• Install from source with cargo install grok-build or use prebuilt binaries
• Configure via ~/.config/grok-build/config.toml
• Set your preferred LLM provider and API key in the config
• Customize keybindings and TUI themes
• Supports project-level config files for team settings

Key Features

• Fullscreen terminal UI with mouse support
• Extensible plugin architecture for custom tools
• Multi-file editing with inline diffs
• Session persistence and replay
• Built in Rust for fast startup and low memory usage

Comparison with Similar Tools

• Claude Code — Anthropic's CLI agent with streaming output; Grok Build offers a more visual fullscreen approach
• Codex CLI — OpenAI's terminal agent; Grok Build emphasizes mouse interactivity
• OpenCode — Open-source agent harness; Grok Build has native TUI with extensible plugins
• Aider — Git-aware pair programming; Grok Build provides a richer visual interface

FAQ

Q: What LLM providers does Grok Build support? A: It supports Grok models by default, with plugin support for other providers including OpenAI, Anthropic, and local models.

Q: Does it require a Grok API key? A: You can configure any compatible LLM provider. A Grok API key is optional.

Q: What platforms are supported? A: Linux, macOS, and Windows. The Rust binary is cross-platform with no runtime dependencies.

Q: Is it fully open source? A: Yes, Grok Build is released under an open-source license on GitHub.

Sources

• https://github.com/xai-org/grok-build
• https://x.ai