# zo > A blazing fast CLI tool for AI interaction ## Docs - [Code Review Examples](/examples/code-review): Learn how to use zo for effective code reviews. - [Data Analysis Examples](/examples/data-analysis): Use zo for quick data analysis, processing, and insights from the command line. - [Git Workflows](/examples/git-workflows): Integrate zo into your Git workflow for better commit messages, PR descriptions, and code reviews. - [Examples](/examples): Real-world examples of using zo in your daily workflow. - [Shell Integration](/examples/shell-integration): Integrate zo into your shell for seamless AI assistance in your terminal workflow. - [Chat Mode](/docs/chat): Have multi-turn conversations with AI models where every response builds on previous context. Perfect for iterative problem-solving, pair programming, and in-depth discussions. - [Configuration](/docs/configuration): zo uses a TOML configuration file for settings, custom models, and personalization. - [Custom Models](/docs/custom-models): Create specialized AI assistants with custom system prompts tailored to your workflow. - [File Output with Tool Calls](/docs/file-output): Let AI models write and update files directly using `!filename` syntax. zo provides a security-first approach with beautiful diff visualization and interactive approval. - [File References](/docs/file-references): Include file contents in your prompts using the intuitive `@filename` syntax. zo reads the files and formats them clearly for the AI, making it easy to analyze code, review documents, or process data. - [Installation](/docs/installation): **OpenRouter API Key** - Get one at [https://openrouter.ai/keys](https://openrouter.ai/keys) - [Model Selection](/docs/models): zo provides intelligent fuzzy model selection with access to 50+ AI models through OpenRouter. - [Quick Start](/docs/quick-start): Get up and running with zo in 5 minutes. - [STDIN Pipelines](/docs/stdin): Pipe output from any command directly to zo for AI analysis. Works seamlessly with Unix philosophy to make AI a natural part of your command pipelines. - [Progressive Streaming](/docs/streaming): zo's progressive streaming architecture displays responses as they're generated, providing instant feedback and a superior user experience.