diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 73cef85..d476e3f 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -9,7 +9,7 @@ This project is a web user interface (UI) for a CRUD (Create, Read, Update, Dele
 *   **Framework:** Astro (latest version)
 *   **Language:** TypeScript, JavaScript (client-side scripts), HTML, CSS
 *   **Styling:** Plain CSS (`src/styles/global.css`)
-*   **Data:** Currently using static JSON files (`src/data/accounts.json`, `src/data/transactions.json`). **The goal is to eventually replace this with a backend API.**
+*   **Data:** Currently using in-memory arrays. **The goal is to eventually integrate with a backend API.**
 
 ## Current State & Key Features
 
@@ -17,7 +17,7 @@ This project is a web user interface (UI) for a CRUD (Create, Read, Update, Dele
     *   **Sidebar:** (`src/components/Sidebar.astro`) Contains account selection dropdown and a collapsible section for adding new transactions. Includes an account summary section.
     *   **Main Content:** (`src/components/MainContent.astro`) Displays the header with the current account name and the transaction list.
 *   **Components:** Separate Astro components exist for major UI sections (Sidebar, MainContent, TransactionTable, AddTransactionForm, AccountSummary).
-*   **Data Loading:** Initial data for accounts and transactions is loaded from static JSON files on the server-side (`src/pages/index.astro`).
+*   **Data Loading:** Currently using empty arrays for accounts and transactions, initialized in `src/pages/index.astro`.
 *   **Account Switching:** Selecting an account from the dropdown in the sidebar correctly updates the Main Content area (header, transaction table) and the Account Summary section using client-side JavaScript (`<script>` tag in `index.astro`).
 *   **Collapsible Form:** The "Add Transaction" section in the sidebar (`src/components/AddTransactionForm.astro`) can be expanded and collapsed using client-side JavaScript (`<script>` tag in `AddTransactionForm.astro`).
 *   **Basic Formatting:** Utility functions (`src/utils.ts`) exist for formatting currency and dates, used both server-side and client-side (mirrored in `index.astro` script).
@@ -26,7 +26,6 @@ This project is a web user interface (UI) for a CRUD (Create, Read, Update, Dele
 ## File Structure Overview
 
 *   `src/components/`: Reusable UI components.
-*   `src/data/`: Static JSON data files (temporary).
 *   `src/layouts/`: Base page layout(s).
 *   `src/pages/`: Astro pages (routes). `index.astro` is the main page.
 *   `src/styles/`: Global CSS styles.