diff --git a/src/add.ts b/src/add.ts
index b90ef0b..3c1b937 100644
--- a/src/add.ts
+++ b/src/add.ts
@@ -3,6 +3,12 @@ import { getPackageJson } from './utils';
 import * as Messages from './messages';
 import { runCommand } from './run-command';
 
+/**
+ * Add packages to the project using yarn add command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnAddPackages(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
@@ -11,14 +17,33 @@ export async function yarnAddPackages(arg: Uri) {
 	runCommand(['add'], packageJson);
 }
 
+/**
+ * Add packages to the project using yarn add command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export function yarnAddPackage(arg: Uri) {
 	return _addPackage(false, arg);
 }
 
+/**
+ * Add packages to the project using yarn add command
+ * with --dev option
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export function yarnAddPackageDev(arg: Uri) {
 	return _addPackage(true, arg);
 }
 
+/**
+ * Add packages to the project using yarn add command with --dev option
+ *
+ * @param dev boolean
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 const _addPackage = async function (dev: boolean, arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
diff --git a/src/extension.ts b/src/extension.ts
index 3cd7de0..6e6a9ac 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -11,6 +11,11 @@ import { yarnRawCommand } from './raw';
 import yarnTerminate from './terminate';
 import { yarnOutdated } from './outdated';
 
+/**
+ * Activate the extension and register all commands and events
+ *
+ * @param context ExtensionContext
+ */
 export const activate = function (context: ExtensionContext) {
 	const disposables = [
 		Commands.registerCommand('yarn-script.installPackages', yarnInstallPackages),
@@ -33,6 +38,11 @@ export const activate = function (context: ExtensionContext) {
 	context.subscriptions.push(...disposables, outputChannel);
 };
 
+/**
+ * Deactivate the extension
+ * @returns void
+ * @export deactivate
+ */
 export function deactivate() {
 	if (terminal) {
 		terminal.dispose();
diff --git a/src/init.ts b/src/init.ts
index 6e47ca9..f65739f 100644
--- a/src/init.ts
+++ b/src/init.ts
@@ -4,6 +4,11 @@ import { workspace as Workspace, window as Window } from 'vscode';
 import * as Messages from './messages';
 import { packageExists, pickPackageJson } from './utils';
 
+/**
+ * Initialize a new package.json file
+ *
+ * @returns void
+ */
 export default async function () {
 	const packageJson = await pickPackageJson();
 
diff --git a/src/install.ts b/src/install.ts
index 37ee398..328a09f 100644
--- a/src/install.ts
+++ b/src/install.ts
@@ -2,6 +2,12 @@ import { getPackageJson } from './utils';
 import { Uri } from 'vscode';
 import { runCommand } from './run-command';
 
+/**
+ * Install packages to the project using yarn install command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnInstallPackages(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
diff --git a/src/outdated.ts b/src/outdated.ts
index ded238b..f13ce51 100644
--- a/src/outdated.ts
+++ b/src/outdated.ts
@@ -2,6 +2,12 @@ import { getPackageJson } from './utils';
 import { Uri } from 'vscode';
 import { runCommand } from './run-command';
 
+/**
+ * Run yarn outdated command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnOutdated(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
diff --git a/src/publish.ts b/src/publish.ts
index 7808f42..af6ea94 100644
--- a/src/publish.ts
+++ b/src/publish.ts
@@ -3,6 +3,12 @@ import { getPackageJson } from './utils';
 import * as Messages from './messages';
 import { runCommand } from './run-command';
 
+/**
+ * Publish package to the registry using yarn publish command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnPublish(arg: Uri) {
 	const cmd: string = 'publish';
 	const packageJson: string = await getPackageJson(arg);
diff --git a/src/raw.ts b/src/raw.ts
index 8ea1d9b..5d20cb7 100644
--- a/src/raw.ts
+++ b/src/raw.ts
@@ -3,6 +3,11 @@ import { packageExists, pickPackageJson } from './utils';
 import * as Messages from './messages';
 import { runCommand } from './run-command';
 
+/**
+ * Run yarn command
+ *
+ * @returns void
+ */
 export async function yarnRawCommand() {
 	const packageJson = await pickPackageJson();
 	if (!packageExists(packageJson)) {
diff --git a/src/remove.ts b/src/remove.ts
index f36d8c7..4f369b6 100644
--- a/src/remove.ts
+++ b/src/remove.ts
@@ -3,6 +3,12 @@ import { getPackageJson } from './utils';
 import * as Messages from './messages';
 import { runCommand } from './run-command';
 
+/**
+ * Remove packages from the project using yarn remove command
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnRemovePackage(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
diff --git a/src/run-command.ts b/src/run-command.ts
index 50ac04a..8ccc216 100644
--- a/src/run-command.ts
+++ b/src/run-command.ts
@@ -64,6 +64,12 @@ function runCommandInIntegratedTerminal(args: string[], cwd: string): void {
 	terminal.sendText(cmd_args.join(' '));
 }
 
+/**
+ * Run command in output window
+ *
+ * @param args command arguments
+ * @param cwd current working directory
+ */
 function runCommandInOutputWindow(args: string[], cwd: string) {
 	const cmd = getYarnBin() + ' ' + args.join(' ');
 
diff --git a/src/run.ts b/src/run.ts
index f2959f8..65b48fa 100644
--- a/src/run.ts
+++ b/src/run.ts
@@ -9,6 +9,12 @@ let lastScript: {
 	script: string;
 };
 
+/**
+ * Read scripts from package.json file
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnRunScript(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
@@ -32,6 +38,12 @@ export async function yarnRunScript(arg: Uri) {
 	});
 }
 
+/**
+ * Read scripts from package.json file
+ *
+ * @param arg path to the file where command orignated
+ * @returns void
+ */
 export async function yarnTest(arg: Uri) {
 	const packageJson: string = await getPackageJson(arg);
 
diff --git a/src/terminate.ts b/src/terminate.ts
index 5cb755e..fea49b8 100644
--- a/src/terminate.ts
+++ b/src/terminate.ts
@@ -2,6 +2,9 @@ import { childs, terminate } from './run-command';
 import { useTerminal } from './utils';
 import { window as Window, QuickPickItem } from 'vscode';
 
+/**
+ * Item for quick pick menu
+ */
 class Item implements QuickPickItem {
 	constructor(public label: string,
 		public description: string,
@@ -9,6 +12,9 @@ class Item implements QuickPickItem {
 	}
 }
 
+/**
+ * Read scripts from package.json file and return them as an object
+ */
 export default function () {
 	if (useTerminal()) {
 		Window.showInformationMessage('Killing is only supported when the setting "runInTerminal" is "false"');
diff --git a/src/utils.ts b/src/utils.ts
index d39bdbf..182b6f7 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -8,6 +8,11 @@ interface PackageJsonRoot {
 	name: string;
 }
 
+/**
+ * Read scripts from package.json file and return them as an object
+ *
+ * @returns object
+ */
 export async function pickPackageJson(): Promise<Readonly<string>> {
 	// if active text editor is a package.json turn the path for it
 	const editor = Window.activeTextEditor;