Video Title: Here Is How to Vibe Code Large Scale Projects
Video ID: k9fPAzS5_Kw
Video URL: https://www.youtube.com/watch?v=k9fPAzS5_Kw
Export Date: 2025-11-06 20:38:55
Channel: AI LABS
Format: markdown
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# Planex: The Ultimate Command Line Coding Agent for Large-Scale Projects

If you’ve ever struggled with AI coding assistants choking on large projects due to context size limitations, you’re not alone. Popular tools like Cursor often hit a wall when dealing with big codebases, causing frustration and project disruptions. But what if there was a smarter, more resilient way to manage AI-assisted coding for massive projects?

Enter **Planex** — a powerful command line coding agent designed specifically for large-scale projects. In this post, we’ll explore what makes Planex stand out, how to install and run it locally, and see it in action through a Swift app demo.

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## What is Planex?

Planex is a command line AI coding assistant built to handle huge codebases that typically overwhelm other tools. Here are some of its standout features:

- **Massive Context Handling:** Supports up to 2 million tokens of context directly and can index directories with 20 million tokens or more.
- **Advanced Code Navigation:** Utilizes tree sitter project maps, a cutting-edge feature in code editors that helps it understand and navigate complex code structures.
- **Multi-Model Support:** Automatically selects the best AI model available through the Open Router API, ensuring resilience and flexibility.
- **Multiple Operation Modes:** Offers cloud-based usage (with or without your own API keys) and a self-hosted local mode.

This combination makes Planex uniquely suited for developers dealing with large, complex codebases who want an AI partner that truly understands their project.

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## How to Install Planex Locally

If you want full control and to run Planex on your own machine, the local mode is the way to go. Here’s a quick overview of the setup process:

### Prerequisites
- **Windows users:** You must have Windows Subsystem for Linux (WSL) installed.
- **Docker:** Ensure Docker is installed and running on your system.

### Steps
1. **Clone the GitHub Repository:** Start by cloning the Planex repo to your local machine.
2. **Start the Local Server:** Use the provided command to launch the Planex server locally. Docker must be running, or you’ll encounter errors.
3. **Install the CLI:** Open a new terminal and install the Planex command line interface (CLI). You may need to enter your password for permissions.
4. **Sign In and Configure:** Sign into Planex in local mode by running the sign-in command. Confirm the default host address and create your local user.
5. **Set Your API Keys:** Export your Open Router API key and OpenAI API key — these are necessary for Planex to function.
6. **Initialize Planex in Your Project:** Navigate to your project directory and initialize Planex using a simple command. You’re now ready to interact with Planex!

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## Using Planex: Chat Mode and Tell Mode

Planex offers two primary modes to interact with your code:

- **Chat Mode:** Start by brainstorming your ideas with Planex. You don’t need a fully fleshed-out plan or deep knowledge of your tech stack. Planex will parse your existing project files and understand the architecture, components, and workflows.
  
- **Tell Mode:** Once you’re ready to build, switch to tell mode. Planex breaks down your main task into smaller, manageable steps and executes them one by one. All changes are made inside a sandbox environment so you can review, approve, or reject modifications before applying them to your actual codebase.

### Additional Features
- **Debugging:** If errors occur during execution, Planex offers debugging options, including a full auto mode that attempts to fix issues automatically. Be cautious, as this mode can consume a lot of tokens and API credits.
- **Command Execution:** You can run shell commands and automate setups within Planex.

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## Planex in Action: Swift App Demo

To demonstrate Planex’s capabilities, let’s look at a real-world example using a Mac OS menu bar app built with Swift and SwiftUI.

1. **Project Understanding:** After pointing Planex to the project, it instantly recognized the app type, architecture, and key components.
2. **UI Improvement Prompt:** I asked Planex to improve the app’s UI — a challenging task for many AI models due to Swift’s complexity.
3. **Step-by-Step Implementation:** Planex reasoned through the project, formulated a plan, and asked to switch to tell mode for implementation.
4. **Sandboxed Changes:** It created a new script to build the app rather than modifying main files initially, then applied changes after approval.
5. **Building and Debugging:** Planex built the app, identified minor build issues, and used full auto debug mode to fix them without manual intervention.
6. **Result:** The updated app now includes the ability to change the accent color dynamically using native Mac OS and SwiftUI components. The UI enhancement was successful, showcasing Planex’s advanced capabilities.

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## Why Planex is a Game-Changer

- **Handles Large Projects:** With token limits far exceeding other tools, Planex is perfect for real-world, sizable codebases.
- **Flexible Deployment:** Use it in the cloud or run it locally with your own API keys for privacy and control.
- **Smart Multi-Model Selection:** Automatically picks the best AI model for each task.
- **Safe Sandbox Environment:** Review changes before applying them, reducing the risk of breaking your code.
- **Effective Debugging:** Auto debug mode helps fix issues quickly and efficiently.

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## Final Thoughts

Planex represents a significant leap forward in AI-assisted coding for developers working on large-scale projects. Its ability to understand massive codebases, break down complex tasks, and safely implement changes makes it a compelling choice for professional developers.

If you’re interested in trying Planex yourself, check out their [GitHub repository](https://github.com/planex) for detailed installation guides and documentation.

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Thanks for reading, and happy coding with Planex!