Context Mode – An Open-Source MCP Server That Reduces AI Coding Context Usage

Context Mode is an open-source MCP server that keeps raw tool output out of the context window via sandbox tools (claimed 315 KB to 5.4 KB, a 98% reduction), tracks session events in SQLite with FTS5/BM25 retrieval for continuity after compaction, and pushes agents to write analysis scripts instead of reading data into context. It ships install paths for 17 clients including Claude Code, Gemini CLI, VS Code and JetBrains Copilot, Copilot CLI, Cursor, OpenCode, KiloCode, OpenClaw/Pi Agent, and Codex CLI, with hook-based routing where supported.