xAI Open-Sources All Terminal Programming Agents: Why Grok Build Shot to the Top of GitHub Trending Overnight

On July 15, 2026, xAI open-sourced the complete Harness and TUI of the Grok Build terminal programming Agent under the Apache 2.0 license. The main body is implemented in Rust, supporting MCP, Skills, local Ollama deployment and multi-model configuration. The repository quickly topped GitHub Trending, and is regarded as a landmark event in the migration of AI coding tools from closed-source IDE plugins to auditable and privatizable terminal Agents. This article sorts out its architecture, installation method, Ollama access and comparison with tools such as Claude Code.