claude-devtools is a cross-platform (macOS, Linux, Windows, Docker) desktop app built with Electron and TypeScript that reads local Claude Code log files and renders them in a visual interface. It enables developers to inspect the full transcript of a Claude Code session, examine individual tool calls and their outputs, monitor token usage and context window consumption, and review subagent activity. It serves as an observability and debugging layer for AI coding agents, helping developers understand what the agent did and where resources were consumed.