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RTK - Rust Token Killer

2026Internal toolInternal / private

Token-optimized CLI proxy for Claude Code. Intercepts common dev commands via Claude Code hooks and rewrites their output before it hits the model context — 60-90% token savings on routine dev operations like git, ls, find, and grep without changing the developer's muscle memory. Written in Rust for fast startup; ships analytics so you can see exactly how many tokens (and dollars) you saved per session.

Highlights

  • Transparent rewrite via Claude Code hooks — zero workflow change
  • 60-90% token savings on git, ls, find, grep, and other read-only commands
  • Built-in analytics: rtk gain shows savings per session and historically
  • Discovery mode mines Claude Code history for missed-savings opportunities
  • Fast startup — Rust binary, no runtime

Run it

$ rtk --version
$ rtk gain
$ rtk gain --history
$ rtk discover
$ rtk proxy <cmd>

Tech

RustClaude Code HooksCLI