I cut my Claude Code bill by 70% with 3 GitHub repos

Tested 10 repos that claim to save tokens. Ran each one for a full day on real projects

Most were just a hype. 3 actually changed my workflow

Here's what they do and how to set each one up:

  1. RTK (Rust Token Killer)

The problem: every terminal command you run like "npm install", "git log", test suites, build output

It gets dumped raw into Claude's context. You're paying for Claude to read thousands of lines of noise

The fix: RTK is a CLI proxy that sits between your terminal and Claude. It filters output before it hits context…