diff --git a/skills/mongodb/SKILL.md b/skills/mongodb/SKILL.md
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+---
+name: mongodb
+description: Creates a new MongoDB project using a pre-configured development environment with custom AI rules.
+---
+
+## When to Use This Skill
+
+Use this skill when the user wants to create a new, ready-to-use MongoDB environment. The skill scaffolds a complete project with a running database server and example data.
+
+## Instructions
+
+1. **Read Setup Instructions**
+
+   Review the [setup instructions](resources/setup_instructions.md) to understand how the project is initialized.
+
+   *Action: Read `resources/setup_instructions.md`.*
+
+2. **Create the Project**
+
+    This skill uses a script to create the project. The script will copy the necessary files and set up the initial project structure.
+
+   *Action: `run_terminal_command(command='bash skills/mongodb/scripts/install_mongodb.sh', windowsCommand='powershell -File skills/mongodb/scripts/install_mongodb.ps1')`.*
diff --git a/skills/mongodb/resources/ai_rules.md b/skills/mongodb/resources/ai_rules.md
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+The following rules are for the AI assistant to follow when assisting with MongoDB development.
+
+## Query Best Practices
+
+*   **Indexes:** Always recommend using indexes for frequently queried fields. The AI should suggest creating indexes on fields used in `find`, `sort`, and `aggregate` operations.
+*   **Projections:** Advise the user to use projections to limit the fields returned by a query. This reduces the amount of data transferred over the network.
+*   **`explain()`:** When a query is slow, suggest using the `explain()` method to analyze the query's performance.
+
+## Schema Design
+
+*   **Embedding vs. Referencing:** The AI should provide guidance on when to embed documents versus when to use references. Embedding is generally preferred for one-to-one or one-to-many relationships where the data is accessed together.
+*   **Data Types:** Recommend using the appropriate data types for fields to optimize storage and performance.
+
+## Security
+
+*   **Input Validation:** The AI should always recommend validating and sanitizing user input to prevent NoSQL injection attacks.
+*   **Least Privilege:** Advise the user to create database users with the minimum required permissions.
diff --git a/skills/mongodb/resources/setup_instructions.md b/skills/mongodb/resources/setup_instructions.md
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+# MongoDB Workspace Setup Instructions
+
+Follow these steps to initialize the workspace.
+
+## 1. Create the MongoDB Project
+
+This step uses a setup script to scaffold the new project.
+
+First, choose a name for your workspace (the default is `my-mongodb-project`). Then, run ONE of the following commands depending on your operating system:
+
+**Windows (PowerShell)**
+
+```powershell
+powershell -File .\skills\mongodb\scripts\install_mongodb.ps1
+```
+
+**macOS / Linux (bash)**
+
+```bash
+bash ./skills/mongodb/scripts/install_mongodb.sh
+```
+
+This single command handles the entire project and dependency setup.
+
+## 2. How It Works
+
+This skill automates the entire setup of a new MongoDB database environment. There are no manual installation steps required.
+
+The setup script creates a new project directory and copies the necessary configuration files. The `.idx/dev.nix` file included in the project tells the IDX environment to automatically install and run a MongoDB server for you.
diff --git a/skills/mongodb/scripts/install_mongodb.ps1 b/skills/mongodb/scripts/install_mongodb.ps1
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+#!/usr/bin/env pwsh
+
+# Prompt the user to choose a template
+$template = Read-Host -Prompt "Choose a MongoDB template (express, flask, or blank)"
+
+while ($template -notin @('express', 'flask', 'blank')) {
+    Write-Host "Invalid option. Please choose 'express', 'flask', or 'blank'."
+    $template = Read-Host -Prompt "Choose a MongoDB template (express, flask, or blank)"
+}
+
+# Prompt the user for a project name.
+$ProjectName = Read-Host -Prompt "Enter the project name (default: my-mongodb-$template-project)"
+
+# If no project name is entered, use the default.
+if ([string]::IsNullOrEmpty($ProjectName)) {
+    $ProjectName = "my-mongodb-$template-project"
+}
+
+# Copy the pre-configured mongodb app template to the new project directory.
+Write-Host "Creating project from template 'mongodb/$template'..."
+Copy-Item -Path "mongodb/$template" -Destination $ProjectName -Recurse
+
+Write-Host "MongoDB project '$ProjectName' created successfully."
diff --git a/skills/mongodb/scripts/install_mongodb.sh b/skills/mongodb/scripts/install_mongodb.sh
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+#!/bin/bash
+
+# Prompt the user to choose a template
+echo "Choose a MongoDB template:"
+select template in "express" "flask" "blank"; do
+    case $template in
+        express|flask|blank)
+            echo "You chose the '$template' template."
+            break
+            ;;
+        *)
+            echo "Invalid option. Please choose 1, 2, or 3."
+            ;;
+    esac
+done
+
+# Prompt the user for a project name.
+read -p "Enter the project name (default: my-mongodb-$template-project): " ProjectName
+
+# If no project name is entered, use the default.
+if [ -z "$ProjectName" ]; then
+    ProjectName="my-mongodb-$template-project"
+fi
+
+# Copy the pre-configured mongodb app template to the new project directory.
+echo "Creating project from template 'mongodb/$template'..."
+cp -r "mongodb/$template" "$ProjectName"
+
+echo "MongoDB project '$ProjectName' created successfully."