xai-org/grok-build, now open source

This article covers xAI's release of the Grok Build codebase under Apache 2.0 following a severe privacy controversy. Users discovered that running the grok CLI tool could upload entire directories, including sensitive files like SSH keys and password databases, to xAI's Google Cloud buckets. After community backlash, xAI disabled the feature, deleted retained data, and open-sourced the code to rebuild trust. The codebase contains 844,530 lines of Rust, with highlights including system prompts for agents, a Mermaid diagram renderer, and tool implementations ported from Codex and OpenCode. The article also notes the subagent prompt's instruction not to reveal its contents, contrasting with the main prompt.