Agent CLIs are settling on a compiled core with a scripting interface on top.

Copilot CLI's August 28 changelog describes a native Rust runtime under a TypeScript terminal interface. Codex is Rust with its own TUI. agent-of-empires (3,158 stars) manages Claude Code, OpenCode, Codex, Gemini CLI and Copilot CLI from a Rust TUI. Headroom's proxy is Rust with a Python surface. (GitHub Changelog) The split is consistent: the part that must survive crashes, enforce sandboxes and count tokens goes compiled, the part that renders and configures stays scriptable. Crash-resume features follow from that split rather than being independent of it.