diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e9793bb..049ae11 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,150 +1,157 @@
-# Contributing Guide
-
-Thank you for your interest in contributing to this project! 🎉
-We welcome contributions from everyone—whether you're fixing bugs, improving documentation, or adding new features.
-
----
-
-## 📌 Getting Started
-
-### 1. Fork the Repository
-
-* Click the **Fork** button at the top right of this repository.
-* This creates a copy of the project under your GitHub account.
-
-### 2. Clone Your Fork
-
-```bash
-git clone https://github.com/BeyteFlow/errlens
-cd errlens
-```
-
-### 3. Set Up the Project
-
-Follow the project-specific setup instructions (if applicable):
-
-```bash
-# Example
-npm install
-# or
-pip install -r requirements.txt
-```
-
----
-
-## 🌱 Creating a Branch
-
-Always create a new branch before making changes:
-
-```bash
-git checkout -b feature/your-feature-name
-```
-
-Branch naming conventions:
-
-* `feature/...` for new features
-* `fix/...` for bug fixes
-* `docs/...` for documentation updates
-
----
-
-## ✏️ Making Changes
-
-* Keep your changes small and focused.
-* Write clear and meaningful commit messages.
-
-Example:
-
-```bash
-git commit -m "Add user authentication feature"
-```
-
----
-
-## 🎯 Coding Standards
-
-Please follow these general guidelines:
-
-* Write clean and readable code
-* Use meaningful variable and function names
-* Follow consistent formatting
-* Add comments where necessary
-* Keep functions small and modular
-
-### Best Practices
-
-* Avoid code duplication
-* Write reusable components/functions
-* Handle errors gracefully
-* Ensure your code does not break existing functionality
-
----
-
-## ✅ Testing
-
-Before submitting your changes:
-
-* Run existing tests (if available)
-* Add new tests for new features (if applicable)
-* Make sure everything works as expected
-
----
-
-## 📤 Submitting a Pull Request
-
-### 1. Push Your Changes
-
-```bash
-git push origin feature/your-feature-name
-```
-
-### 2. Open a Pull Request
-
-* Go to your fork on GitHub
-* Click **Compare & Pull Request**
-* Provide a clear description of your changes
-
-### 3. Pull Request Guidelines
-
-* Describe what you changed and why
-* Reference related issues (if any)
-* Keep PRs focused and concise
-
----
-
-## 🐛 Reporting Issues
-
-When creating an issue, please include:
-
-* A clear and descriptive title
-* Steps to reproduce the issue
-* Expected vs actual behavior
-* Screenshots (if applicable)
-
----
-
-## 🔄 Contribution Workflow
-
-1. Fork the repository
-2. Clone your fork
-3. Create a new branch
-4. Make your changes
-5. Commit and push
-6. Submit a Pull Request
-7. Address review feedback (if any)
-
----
-
-## 📜 Project-Specific Rules
-
-* Do not commit sensitive information (API keys, passwords, etc.)
-* Keep dependencies minimal and necessary
-* Update documentation when needed
-* Follow existing project structure and patterns
-
----
-
-## 🙌 Thank You!
-
-Your contributions help improve this project for everyone.
-We appreciate your time and effort! 🚀
+# Contributing Guide
+
+Thank you for your interest in contributing to this project! 🎉
+We welcome contributions from everyone—whether you're fixing bugs, improving documentation, or adding new features.
+
+---
+
+## 📌 Getting Started
+
+### 1. Fork the Repository
+
+* Click the **Fork** button at the top right of this repository.
+* This creates a copy of the project under your GitHub account.
+
+### 2. Clone Your Fork
+
+```bash
+git clone https://github.com/BeyteFlow/errlens
+cd errlens
+```
+
+### 3. Set Up the Project
+
+**Prerequisites:** Node.js **v20.0.0 or higher** is required (see `engines` field in `package.json`). No Docker, database, or `.env` file is needed.
+
+```bash
+# Install dependencies using npm
+npm install
+
+# Verify the CLI works locally
+node bin/index.js --version
+
+# Run the test suite
+npm test
+# which runs: node --test test/**/*.test-lang.js
+```
+
+> **Note:** There is no dev server to start — ErrLens is a CLI tool. After `npm install`, use `node bin/index.js` in place of the `errlens` command to test your changes locally.
+
+---
+
+## 🌱 Creating a Branch
+
+Always create a new branch before making changes:
+
+```bash
+git checkout -b feature/your-feature-name
+```
+
+Branch naming conventions:
+
+* `feature/...` for new features
+* `fix/...` for bug fixes
+* `docs/...` for documentation updates
+
+---
+
+## ✏️ Making Changes
+
+* Keep your changes small and focused.
+* Write clear and meaningful commit messages.
+
+Example:
+
+```bash
+git commit -m "Add user authentication feature"
+```
+
+---
+
+## 🎯 Coding Standards
+
+Please follow these general guidelines:
+
+* Write clean and readable code
+* Use meaningful variable and function names
+* Follow consistent formatting
+* Add comments where necessary
+* Keep functions small and modular
+
+### Best Practices
+
+* Avoid code duplication
+* Write reusable components/functions
+* Handle errors gracefully
+* Ensure your code does not break existing functionality
+
+---
+
+## ✅ Testing
+
+Before submitting your changes:
+
+* Run existing tests (if available)
+* Add new tests for new features (if applicable)
+* Make sure everything works as expected
+
+---
+
+## 📤 Submitting a Pull Request
+
+### 1. Push Your Changes
+
+```bash
+git push origin feature/your-feature-name
+```
+
+### 2. Open a Pull Request
+
+* Go to your fork on GitHub
+* Click **Compare & Pull Request**
+* Provide a clear description of your changes
+
+### 3. Pull Request Guidelines
+
+* Describe what you changed and why
+* Reference related issues (if any)
+* Keep PRs focused and concise
+
+---
+
+## 🐛 Reporting Issues
+
+When creating an issue, please include:
+
+* A clear and descriptive title
+* Steps to reproduce the issue
+* Expected vs actual behavior
+* Screenshots (if applicable)
+
+---
+
+## 🔄 Contribution Workflow
+
+1. Fork the repository
+2. Clone your fork
+3. Create a new branch
+4. Make your changes
+5. Commit and push
+6. Submit a Pull Request
+7. Address review feedback (if any)
+
+---
+
+## 📜 Project-Specific Rules
+
+* Do not commit sensitive information (API keys, passwords, etc.)
+* Keep dependencies minimal and necessary
+* Update documentation when needed
+* Follow existing project structure and patterns
+
+---
+
+## 🙌 Thank You!
+
+Your contributions help improve this project for everyone.
+We appreciate your time and effort! 🚀