therealarthur/myrlin-workbook

What it solves

Myrlin Workbook is a local management interface for AI coding agents. It solves the problem of juggling multiple terminal windows and fragmented session histories when using command-line AI tools like Claude Code and ChatGPT Codex. It provides a centralized sidebar to organize sessions by project folder, allows for full scrollback history (which these agents often lack), and tracks costs and tasks across different providers.

How it works

It runs as a local Node.js server that reads session data directly from the local storage directories of Claude Code and ChatGPT Codex. It uses xterm.js and node-pty to provide real terminal access in a browser tab, allowing users to interact with their agents in a real PTY. The system is read-only regarding session history and does not use a cloud service or external database, keeping all data on the user's machine.

Who it’s for

Developers who use AI coding agents via the CLI and need a way to organize their conversations, monitor costs, and manage their workflow (including git worktrees and kanban boards) from a single, browser-based interface.

Highlights

• Unified Session Management: Groups all Claude Code and ChatGPT Codex sessions by the directory they ran in.
• Scrollable Terminal: Provides a full, continuous scrollback history across the entire conversation, including the agent's output.
• Codex Integration: Reads threads directly from the ChatGPT desktop app's SQLite database.
• Cost Tracking: Calculates spending based on Claude's usage fields in transcripts, with visual timeline charts.
• Developer Workflow Tools: Includes a built-in kanban board, git worktree management, and pull request automation via the gh CLI.
• Mobile Access: Optimized for phone use via LAN or Cloudflare tunnels, featuring a custom keyboard layout for control keys.
• Privacy-First: No sign-up, no cloud, no telemetry, and no external model calls unless requested by the user.