Grok Build's tool implementations include code imitated or directly ported from other coding agents, such as Codex's apply_patch and OpenCode's bash, edit, and other tools, as credited in its THIRD_PARTY_NOTICES.md file.

Simon Willison notes that Grok Build bundles tool implementations copied from Codex and OpenCode, credited via THIRD_PARTY_NOTICES.md, though it's unclear how or when Grok switches between them. ✦ AI generated

Simon Willison · Simon Willison's Weblog · 2026-07-15 · original ↗

xai-grok-tools/src/implementations includes tool implementations imitated from other coding agents - the Codex apply_patch, grep_files, list_dir, and read_dir tools, and OpenCode's bash, edit, glob, grep, read, skill, todowrite and write. The xai-grok-tools/THIRD_PARTY_NOTICES.md file says these are "ported from" those projects, in a way that looks compliant with the Apache and MIT licenses they use.

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