spacecake

What it does

spacecake is an open-source desktop application designed to provide a superior interface for Claude Code. It combines a Notion-style markdown editor with an integrated Ghostty terminal, bridging the gap between running terminal agents and editing documentation. The app features a real-time status bar to monitor context window usage and costs, a live task panel to track agent progress, and a WYSIWYG editor for spec-driven development. It allows users to write specs, create Mermaid diagrams, and define custom project rules via JSON to maintain coding conventions.

Core features

• ✦Notion-style markdown editor
• ✦Integrated Ghostty terminal
• ✦Real-time context window and usage cost tracking
• ✦Live task monitoring panel
• ✦WYSIWYG editing with rich code blocks
• ✦Custom rule definitions via JSON

Use cases

• →Editing markdown documentation while running Claude Code agents
• →Monitoring AI agent tasks and progress visually
• →Explaining code architecture using integrated Mermaid diagrams
• →Tracking API costs and context limits in real-time during development