Rtk – High-performance CLI proxy to minimize LLM token consumption (github.com)

The newly announced Rust Token Killer (rtk) CLI proxy is a high-performance tool designed to significantly reduce token consumption when interacting with large language models (LLMs), such as Claude Code. By filtering and compressing command outputs, rtk can achieve token savings of 60-90% during common operations, translating an estimated reduction from ~150,000 tokens to about ~45,000 tokens in typical scenarios. This optimization is crucial for developers aiming to minimize costs and enhance efficiency when utilizing LLMs for command-line interactions. What sets rtk apart is its unique functionality in managing token usage without sacrificing output quality. Users can verify their installation and monitor token savings through various commands (`rtk gain`) and can benefit from features like smart filtering, deduplication, and aggregated command results. The latest version, v0.9.5, introduces a "hook-first" installation method, which allows commands to be rewritten transparently, ensuring seamless integration into workflows with zero overhead. This level of token optimization is especially valuable for developers working with large codebases, as it streamlines operation outputs and significantly lowers the cost of using LLMs for programming tasks.