rtk Kit

Token-reduction proxy via RTK — intercepts shell commands and compresses output to reduce LLM token usage by 60-90%.

Activation: Opt-in — only active if explicitly enabled in your config.

What's Included

• rtk — CLI proxy that rewrites command outputs to strip noise (comments, whitespace, boilerplate)
• Claude Code hooks — auto-mounted PreToolUse hook that transparently intercepts Bash commands

Configuration

kits:
  rtk: {}

How It Works

RTK registers a PreToolUse hook that intercepts every Bash command the agent runs. Commands like git status, ls, grep, etc. are transparently rewritten through RTK, which strips noise and compresses the output before the agent sees it.

The hook and awareness doc are generated at image build time and mounted into ~/.claude/ at container start.

Usage

# Check token savings
rtk gain

# See savings over time
rtk gain --graph

# Discover optimization opportunities
rtk discover

RTK supports 100+ commands across files, git, testing, build/lint, and containers. See the RTK documentation for the full list.