rtk is a high-performance command-line interface (CLI) proxy designed to significantly reduce LLM token consumption by filtering and compressing command outputs, typically achieving 60-90% savings. Implemented as a single Rust binary, it supports over 100 common CLI commands and employs four core strategies: smart filtering, grouping, truncation, and deduplication. With a transparent auto-rewrite hook for Bash commands, rtk optimizes the context provided to LLMs without altering user workflows, thereby enhancing efficiency and cost-effectiveness when interacting with AI tools.
cc-safe-setup is a security utility for Claude Code that installs 8 safety hooks to ensure safe autonomous operation. It acts as a checkpoint, intercepting dangerous commands like 'rm -rf /', preventing unauthorized pushes to main branches, and catching secret leaks before execution. Specifically designed to address AI agent regressions and the Opus 4.7 safety crisis, it provides defense-in-depth through process-level hooks, including syntax validation and context window monitoring, making it an essential guardrail for AI-driven development.