Claude DevTools: A Log Reader for Enhanced Claude Code Visibility

Claude DevTools is a utility that addresses common frustrations with Claude Code's terminal output by parsing the existing log files in your ~/.claude/ folder. It provides detailed visibility into sessions without modifying how Claude Code itself operates.

Key Features

• Full visibility into operations: Shows every file read, every edit with inline diffs, and every bash command executed, replacing vague summaries like "Read 3 files" with specific, syntax-highlighted details.
• Token breakdown per turn: Splits context usage across seven categories: CLAUDE.md files, tool call inputs/outputs, thinking tokens, skill activations, user text, and others, helping identify what consumes the context window.
• Context window visualization: Displays how context fills over a session, when compaction occurs, and what gets dropped, clarifying why Claude might forget information mid-conversation.
• Full subagent visibility: When Claude uses the Task tool to spin up sub-agents, it renders each agent's full execution tree—including prompts, tool calls, token usage, cost, and duration. If agents spawn more agents, it displays the entire nested tree. Team features like TeamCreate and SendMessage show each teammate as a color-coded card.
• Thinking output: Allows reading extended thinking blocks alongside tool traces to understand the reasoning behind Claude's decisions.
• Custom notifications: Supports alerts for events such as .env file access, tool execution errors, or token usage spikes past a threshold, with regex triggers for sensitive file paths.
• Works with all sessions: Reads raw log files, capturing sessions from the terminal, VS Code, and other tools without data loss.
• Multiple deployment options: Available as an Electron app, Docker container, or standalone Node server accessible via browser, useful for remote setups or avoiding Electron.
• Zero setup: Requires no API keys or config files—just install and open.
• Open-source and local: The tool is open-source, runs locally, and is read-only, not interfering with Claude Code's operation.

The tool is designed for heavy Claude Code users who need more transparency than the default terminal output provides. It runs independently, leveraging existing logs to deliver detailed insights into session activity.