Gemini CLI Tips by Addy Osmani
A collection of ~30 pro-tips for effectively using Gemini CLI, an open-source AI assistant for agentic coding in the terminal.
What is Gemini CLI Tips by Addy Osmani?
Gemini CLI Tips & Tricks is a guide offering approximately 30 advanced techniques for maximizing the Gemini CLI, an open-source AI assistant that operates directly in the terminal. It helps developers leverage the CLI for coding tasks, debugging, content generation, and system automation through natural language prompts, acting as a supercharged pair programmer. The guide covers features like persistent context, custom commands, and extensibility to solve complex development problems efficiently.
Developers, DevOps engineers, and power users who work extensively in the terminal and want to integrate AI assistance into their daily workflows for coding, debugging, and automation tasks.
It provides actionable, pro-level insights that go beyond basic usage, teaching users how to customize, extend, and automate with Gemini CLI for greater productivity and deeper integration into their development environment.
Overview
Gemini CLI Tips and Tricks
Use Cases
Best For
- Automating repetitive coding tasks with custom slash commands
- Debugging complex issues with AI-assisted analysis and file referencing
- Extending terminal functionality with custom MCP servers for external integrations
- Managing multi-directory projects with a unified AI workspace
- Scripting and automating headless AI tasks in CI/CD pipelines
- Maintaining persistent context and memory across long development sessions
Not Ideal For
- Developers who prefer graphical AI assistants with point-and-click interfaces
- Projects requiring fully offline functionality or air-gapped environments
- Teams needing instant, zero-configuration AI tools without authentication or setup
- Users with limited terminal experience who primarily rely on IDE plugins for AI assistance
Pros & Cons
Pros
Covers approximately 30 advanced tips, from persistent context with GEMINI.md to custom slash commands, providing deep, actionable insights for maximizing Gemini CLI's capabilities.
Details how to create custom slash commands and integrate MCP servers, enabling users to tailor the AI assistant to specific workflows and external systems, as shown in the README's examples.
Highlights features like file referencing with @ syntax, checkpointing for undo, and headless mode, which facilitate seamless automation and integration into development tasks.
Emphasizes using GEMINI.md for project-specific instructions and memory addition, reducing repetitive prompting and improving AI accuracy across sessions.
Cons
Requires internet access and either a Google account or paid API key, limiting usability in offline scenarios or environments with strict data privacy concerns.
Advanced features like MCP server integration and custom command creation involve non-trivial setup, technical knowledge, and manual editing of TOML/JSON files, which can be daunting for some users.
The free tier has usage constraints (e.g., 1,000 requests per day), and heavy reliance on API keys may incur costs, with the guide offering limited guidance on optimizing token spend.
Frequently Asked Questions
Related Projects
gemini-cli-extensionCollection of helpful gemini cli extensions and commands
gemini-docs-extGemini CLI extension that adds Gemini API docs and MCP
gemini-cli-media-generationAn example of using Gemini CLI with MCP Servers for Genmedia and Gemini 2.5 Flash Image model
gemini-cli-demosDemos-in-a-box for Gemini CLI
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