Extended Memory MCP is a Model Context Protocol server that provides cross-session memory storage for the Claude Desktop app. It addresses context loss that can occur when token limits are reached or a new chat is started by automatically saving and restoring memory across conversations. The server supports memory across multiple projects while ensuring strict isolation so each project has its own context, decisions, and history. It stores and exposes memory categories such as project context and current work status, architectural decisions and their reasoning, and Claude’s communication style and user preferences. It is designed to run as an MCP server (not a CLI tool) and integrates directly with the Desktop Claude app via MCP. Data storage is local to the user by default, with configurable options via STORAGE_CONNECTION_STRING and LOG_LEVEL. Redis storage is available as an experimental option. Platform notes: macOS/Linux use the default local path (e.g., ~/.local/share/extended-memory-mcp/memory.db); Windows users are advised to set an explicit path. The server provides memory management tools (save_context, load_contexts, forget_context, list_all_projects, get_popular_tags) and can be installed via PyPI or from source.