buildarc is a command-line interface tool designed to transform Claude Code session transcripts into publishable content. It was created to solve the challenge of documenting development journeys by extracting meaningful insights from coding sessions.

buildarc automatically detects your project and parses all Claude Code sessions at once, not just individual sessions. It extracts important moments including decisions, pivots, emotions, and breakthroughs from your development process. The tool scrubs API keys and secrets automatically to ensure security.

The CLI processes sessions locally using pure Node.js built-ins with zero dependencies. Everything runs on your machine without transmitting data or collecting telemetry. It works retroactively on sessions that have already occurred.

buildarc generates ready-to-post content formatted for various platforms including X threads, LinkedIn posts, and build journals. It can process large volumes of data quickly, handling 50 sessions and hundreds of MB of .jsonl files in seconds.

The tool is designed for developers who use Claude Code for their projects and want to document their building process publicly. It's particularly useful for those practicing 'building in public' who need to transform their coding sessions into shareable content.