Nestedagents.

NotebookLM Becomes Gemini Notebook, Claude Code Agents Go 3 Levels Deep, and Suno Enters iMessage: 3 AI Picks for Late July 2026

Google rebranded NotebookLM as Gemini Notebook and added cloud code execution inside every notebook. Anthropic enabled Claude Code subagents to spawn their own subagents up to three levels deep. Suno AI rebuilt its lyrics editor from scratch and integrated into the iOS iMessage keyboard.