Pi for Excel: AI Sidebar Add-in Powered by Pi
Summary
Pi for Excel is an experimental, open-source AI sidebar add-in for Microsoft Excel that runs inside the workbook. It supports multiple AI providers (Anthropic, OpenAI, Google Gemini, GitHub Copilot) and exposes 16 core tools to read, write, format, analyze, and track workbook changes. It features multi-model support, session management, auto-context injection, recovery checkpoints, extension sandboxing, and external integrations like Web Search and MCP Gateway, with deployment via Vercel.