rtk: Rust CLI Proxy Cuts LLM Token Consumption 60–90% on Common Dev Commands

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rtk-ai/rtk (8,624 GitHub stars) is a single Rust binary with zero dependencies that acts as a CLI proxy for agentic coding tools, intercepting common dev commands and compressing token payloads by 60–90% before they reach the LLM. Designed specifically for Claude Code, Codex, and similar CLI agents, it operates transparently in the request path without requiring prompt or workflow changes. This is the first purpose-built token compression layer for the AI coding CLI ecosystem with validated reduction numbers.