diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3829e9b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# PHP binary flags
+
+This is a simple extension to create PHP flags that act like keyword arguments. A flag is a constant defining an integer that can be use for bitwise operations (combined with other flags) and provide multiple configuration entries in one variable. Read more about underlying concept in the [documentation](https://www.php.net/manual/en/language.operators.bitwise.php).
+
+For now, this extension only provides object-oriented flags.
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 6c40941..c1a8324 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -536,9 +536,9 @@
 			}
 		},
 		"lodash": {
-			"version": "4.17.15",
-			"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-			"integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+			"version": "4.17.21",
+			"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+			"integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
 			"dev": true
 		},
 		"log-symbols": {
diff --git a/package.json b/package.json
index e189eb5..1009de3 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,12 @@
 	"name": "phpbinaryflags",
 	"displayName": "PHP binary flags",
 	"description": "Automatically generate sets of binary flags",
+	"publisher": "bloohirsch",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/butteredptarmigan/vscode-php-binary-flags"
+	},
+	"license": "GNU GPL 3.0",
 	"version": "0.0.1",
 	"engines": {
 		"vscode": "^1.41.0"
diff --git a/src/extension.ts b/src/extension.ts
new file mode 100644
index 0000000..60f5c6c
--- /dev/null
+++ b/src/extension.ts
@@ -0,0 +1,38 @@
+import * as vscode from 'vscode';
+import { Generator } from './lib/Generator';
+import { validate, parseResult } from './lib/entries';
+import { Escape } from './lib/Escape';
+
+export function activate(context: vscode.ExtensionContext) {
+	let disposable = vscode.commands.registerCommand('extension.generateFlags', () => {
+        try {
+            const args = Object();
+            
+            vscode.window.showInputBox({
+                prompt: 'How many flags should be created?',
+                validateInput: validate
+            })
+            .then((result) => {
+                args.count = parseResult(result);
+    
+                return vscode.window.showInputBox({
+                    prompt: 'Select a base, i.e. last flag that already exists (leave empty for no base)',
+                    validateInput: validate
+                });
+            })
+            .then((result) => {
+                args.from = parseResult(result);
+                const text = Generator.generate(args.count, args.from);
+                const snippet = new vscode.SnippetString(text);
+                
+                vscode.window.activeTextEditor?.insertSnippet(snippet);
+            });
+        } catch (err) {
+            if (err instanceof Escape) return;
+        }
+	});
+
+	context.subscriptions.push(disposable);
+}
+
+export function deactivate() {}
\ No newline at end of file
diff --git a/src/lib/Escape.ts b/src/lib/Escape.ts
new file mode 100644
index 0000000..7f82dda
--- /dev/null
+++ b/src/lib/Escape.ts
@@ -0,0 +1 @@
+export class Escape extends Error { }
\ No newline at end of file
diff --git a/src/lib/Generator.ts b/src/lib/Generator.ts
new file mode 100644
index 0000000..45b5efc
--- /dev/null
+++ b/src/lib/Generator.ts
@@ -0,0 +1,18 @@
+export class Generator
+{
+    public static generate(count: number, from: number | null): string
+    {
+        const lines: Array<string> = [];
+
+        let num = (from === null)
+            ? 1
+            : from * 2;
+        for (let i = 0; i < count; i++) {
+            const line = `public const $${i + 1} = ${num};`;
+            lines.push(line);
+            num *= 2;
+        }
+
+        return lines.join('\n');
+    }
+}
\ No newline at end of file
diff --git a/src/lib/entries.ts b/src/lib/entries.ts
new file mode 100644
index 0000000..3164317
--- /dev/null
+++ b/src/lib/entries.ts
@@ -0,0 +1,35 @@
+import { Escape } from "./Escape";
+
+function parse(input: string): number | null {
+    if (!input) {
+        return null;
+    }
+
+    return Number.parseInt(input.trim());
+}
+
+export function validate(input: string): string | null {
+    try {
+        var actual = parse(input);
+
+        if (actual === null) {
+            return null;
+        }
+
+        if (actual < 1) {
+            return 'Input must be an integer greater that zero.'
+        }
+    } catch (error) {
+        return 'Input must be a valid integer.';
+    }
+
+    return null;
+}
+
+export function parseResult(result: string | undefined) {
+    if (result === undefined) {
+        throw new Escape();
+    }
+
+    return parse(<string>result);
+}
\ No newline at end of file