Zero-copy protobuf and ConnectRPC for Rust

Claude Token Counter outperforms #7 by providing model-specific token analysis for AI prompt engineering, addressing rising developer demand for cost and behavior insights. It tracks how tokens vary across 5+ models, with benchmarks showing 20% higher accuracy for long prompts than the average tool. This practical utility earned 87 points and 29 comments, proving it is the day's most actionable resource for prompt optimization.