RTK Open-Source Tool Cuts AI Agent Token Costs by Up to 90% via CLI Filtering

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RTK (Rust Token Killer) is an open-source command-line proxy built in Rust by rtk-ai, designed to reduce the volume of terminal output consumed by AI coding agents such as Claude Code, Cursor, and Codex. As developers rely more on AI agents for terminal tasks, verbose logs from tools like git and test runners rapidly fill LLM context windows, raising API costs and reducing efficiency. RTK intercepts shell commands and compresses stdout output before it reaches the agent, cutting token consumption by 60% to 90% across common developer workflows. The tool compiles to a single native binary with sub-10ms overhead, operates fully offline, and supports tailored filters for over 100 developer tools including pytest, eslint, Docker, and cargo. RTK can be installed via Homebrew or Windows Package Manager and integrates with agent environments through native lifecycle hooks.

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Single stale hash entry caused 29 of 59 test failures in one config file

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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