Plan mode is now available in Gemini CLI- Google Developers Blog

What this post added

Introduced 'plan mode' for Gemini CLI, a read-only mode that enables agents to analyze requests, map complex changes, understand codebases, and ask clarifying questions before execution. This mode utilizes read-only tools like `read_file`, `grep_search`, and `glob` for safe exploration, specialized sub-agents like `codebase_investigator` for architectural mapping, and supports iterative design through conversation. The `ask_user` tool was introduced to allow agents to pause and ask targeted questions for clarification. Plan mode also supports read-only MCP tools for accessing external context from GitHub, Postgres, and Google Docs. The Conductor extension is highlighted as an example of leveraging plan mode and `ask_user` for context-driven development and complex workflow orchestration. Plan mode is enabled by default and can be toggled off in settings. Higher reasoning Pro models like Gemini 3.1 Pro are used during planning.