Claude Code usage tracking by LangWatch

Claude Code usage tracking by LangWatch is an innovative tool designed for developers and AI practitioners who want deep insights into their Claude Code sessions. By running a simple command (`npx langwatch claude`), users can monitor costs, cache reads and writes, session replays, and detailed token usage. The tool uniquely breaks down costs into cached versus non-cached tokens, providing transparency into billing and resource consumption. It also visualizes each API call as a span, allowing users to analyze their session flow meticulously. Additionally, it offers full terminal replays within its UI, making debugging and session review straightforward. While tailored for Claude Code, it also supports Codex, broadening its utility. This makes LangWatch a must-have for developers aiming to optimize AI interactions, control costs, and improve debugging processes, all while maintaining transparency and detailed session insights.