SpaceXAI Open-Sources Grok Build: The Rust Agent Harness, TUI, and Tool Layer Behind Its Coding CLI

Summary

<p>SpaceXAI published the Grok Build source on July 15, 2026. The Apache 2.0 Rust tree covers the agent loop, tool dispatch, the TUI, and the extension system. Grok 4.5 stays closed, and external contributions are not accepted.</p> <p>The post <a href="https://www.marktechpost.com/2026/07/15/spacexai-open-sources-grok-build-the-rust-agent-harness-tui-and-tool-layer-behind-its-coding-cli/">SpaceXAI Open-Sources Grok Build: The Rust Agent Harness, TUI, and Tool Layer Behind Its Coding CLI</a> appeared first on <a href="https://www.marktechpost.com">MarkTechPost</a>.</p>