diff --git a/.eslintrc.json b/.eslintrc.json
new file mode 100644
index 0000000..83479e8
--- /dev/null
+++ b/.eslintrc.json
@@ -0,0 +1,19 @@
+{
+    "root": true,
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "ecmaVersion": 6,
+        "sourceType": "module"
+    },
+    "plugins": [
+        "@typescript-eslint"
+    ],
+    "rules": {
+        "@typescript-eslint/class-name-casing": "warn",
+        "@typescript-eslint/semi": "warn",
+        "curly": "warn",
+        "eqeqeq": "warn",
+        "no-throw-literal": "warn",
+        "semi": "off"
+    }
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f086c3b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# ignore vscode extension relevant files
+out
+node_modules
+.vscode-test/
+*.vsix
+
+# ignore python relevant files
+__pycache__
\ No newline at end of file
diff --git a/.vscode_deafult/extensions.json b/.vscode_deafult/extensions.json
new file mode 100644
index 0000000..af51550
--- /dev/null
+++ b/.vscode_deafult/extensions.json
@@ -0,0 +1,9 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"dbaeumer.vscode-eslint"
+	]
+}
\ No newline at end of file
diff --git a/.vscode_deafult/launch.json b/.vscode_deafult/launch.json
new file mode 100644
index 0000000..6cd3add
--- /dev/null
+++ b/.vscode_deafult/launch.json
@@ -0,0 +1,44 @@
+// A launch configuration that compiles the extension and then opens it inside a new window
+{
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"type": "extensionHost",
+			"request": "launch",
+			"name": "Launch Client",
+			"runtimeExecutable": "${execPath}",
+			"args": ["--extensionDevelopmentPath=${workspaceRoot}"],
+			"outFiles": ["${workspaceRoot}/client/out/**/*.js"],
+			"preLaunchTask": {
+				"type": "npm",
+				"script": "watch"
+			}
+		},
+		{
+			"type": "node",
+			"request": "attach",
+			"name": "Attach to Server",
+			"port": 6009,
+			"restart": true,
+			"outFiles": ["${workspaceRoot}/server/out/**/*.js"]
+		},
+		{
+			"name": "Language Server E2E Test",
+			"type": "extensionHost",
+			"request": "launch",
+			"runtimeExecutable": "${execPath}",
+			"args": [
+				"--extensionDevelopmentPath=${workspaceRoot}",
+				"--extensionTestsPath=${workspaceRoot}/client/out/test/index",
+				"${workspaceRoot}/client/testFixture"
+			],
+			"outFiles": ["${workspaceRoot}/client/out/test/**/*.js"]
+		}
+	],
+	"compounds": [
+		{
+			"name": "Client + Server",
+			"configurations": ["Launch Client", "Attach to Server"]
+		}
+	]
+}
diff --git a/.vscode_deafult/settings.json b/.vscode_deafult/settings.json
new file mode 100644
index 0000000..a0dfd58
--- /dev/null
+++ b/.vscode_deafult/settings.json
@@ -0,0 +1,9 @@
+{
+	"editor.insertSpaces": false,
+	"tslint.enable": true,
+	"typescript.tsc.autoDetect": "off",
+	"typescript.preferences.quoteStyle": "single",
+	"editor.codeActionsOnSave": {
+		"source.fixAll.eslint": true
+	}
+}
\ No newline at end of file
diff --git a/.vscode_deafult/tasks.json b/.vscode_deafult/tasks.json
new file mode 100644
index 0000000..070d88e
--- /dev/null
+++ b/.vscode_deafult/tasks.json
@@ -0,0 +1,33 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"type": "npm",
+			"script": "compile",
+			"group": "build",
+			"presentation": {
+				"panel": "dedicated",
+				"reveal": "never"
+			},
+			"problemMatcher": [
+				"$tsc"
+			]
+		},
+		{
+			"type": "npm",
+			"script": "watch",
+			"isBackground": true,
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			},
+			"presentation": {
+				"panel": "dedicated",
+				"reveal": "never"
+			},
+			"problemMatcher": [
+				"$tsc-watch"
+			]
+		}
+	]
+}
\ No newline at end of file
diff --git a/.vscodeignore b/.vscodeignore
new file mode 100644
index 0000000..c06f4a7
--- /dev/null
+++ b/.vscodeignore
@@ -0,0 +1,10 @@
+.vscode/**
+.vscode-test/**
+out/test/**
+src/**
+.gitignore
+vsc-extension-quickstart.md
+**/tsconfig.json
+**/.eslintrc.json
+**/*.map
+**/*.ts
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..8c24ad6
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Change Log
+
+All notable changes to the "vscode-python-mro" extension will be documented in this file.
+
+Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
+
+## [Unreleased]
+
+- Initial release
\ No newline at end of file
diff --git a/client/package-lock.json b/client/package-lock.json
new file mode 100644
index 0000000..e2fb7c7
--- /dev/null
+++ b/client/package-lock.json
@@ -0,0 +1,214 @@
+{
+    "name": "python-mro-client",
+    "version": "0.0.1",
+    "lockfileVersion": 1,
+    "requires": true,
+    "dependencies": {
+        "@types/vscode": {
+            "version": "1.46.0",
+            "resolved": "https://registry.npmjs.org/@types/vscode/-/vscode-1.46.0.tgz",
+            "integrity": "sha512-8m9wPEB2mcRqTWNKs9A9Eqs8DrQZt0qNFO8GkxBOnyW6xR//3s77SoMgb/nY1ctzACsZXwZj3YRTDsn4bAoaUw==",
+            "dev": true
+        },
+        "agent-base": {
+            "version": "4.3.0",
+            "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.3.0.tgz",
+            "integrity": "sha512-salcGninV0nPrwpGNn4VTXBb1SOuXQBiqbrNXoeizJsHrsL6ERFM2Ne3JUSBWRE6aeNJI2ROP/WEEIDUiDe3cg==",
+            "dev": true,
+            "requires": {
+                "es6-promisify": "^5.0.0"
+            }
+        },
+        "balanced-match": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+            "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+            "dev": true
+        },
+        "brace-expansion": {
+            "version": "1.1.11",
+            "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+            "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+            "dev": true,
+            "requires": {
+                "balanced-match": "^1.0.0",
+                "concat-map": "0.0.1"
+            }
+        },
+        "concat-map": {
+            "version": "0.0.1",
+            "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+            "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+            "dev": true
+        },
+        "debug": {
+            "version": "3.1.0",
+            "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+            "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+            "dev": true,
+            "requires": {
+                "ms": "2.0.0"
+            }
+        },
+        "es6-promise": {
+            "version": "4.2.8",
+            "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.8.tgz",
+            "integrity": "sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==",
+            "dev": true
+        },
+        "es6-promisify": {
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/es6-promisify/-/es6-promisify-5.0.0.tgz",
+            "integrity": "sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=",
+            "dev": true,
+            "requires": {
+                "es6-promise": "^4.0.3"
+            }
+        },
+        "fs.realpath": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+            "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
+            "dev": true
+        },
+        "glob": {
+            "version": "7.1.6",
+            "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+            "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
+            "dev": true,
+            "requires": {
+                "fs.realpath": "^1.0.0",
+                "inflight": "^1.0.4",
+                "inherits": "2",
+                "minimatch": "^3.0.4",
+                "once": "^1.3.0",
+                "path-is-absolute": "^1.0.0"
+            }
+        },
+        "http-proxy-agent": {
+            "version": "2.1.0",
+            "resolved": "https://registry.npmjs.org/http-proxy-agent/-/http-proxy-agent-2.1.0.tgz",
+            "integrity": "sha512-qwHbBLV7WviBl0rQsOzH6o5lwyOIvwp/BdFnvVxXORldu5TmjFfjzBcWUWS5kWAZhmv+JtiDhSuQCp4sBfbIgg==",
+            "dev": true,
+            "requires": {
+                "agent-base": "4",
+                "debug": "3.1.0"
+            }
+        },
+        "https-proxy-agent": {
+            "version": "2.2.4",
+            "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-2.2.4.tgz",
+            "integrity": "sha512-OmvfoQ53WLjtA9HeYP9RNrWMJzzAz1JGaSFr1nijg0PVR1JaD/xbJq1mdEIIlxGpXp9eSe/O2LgU9DJmTPd0Eg==",
+            "dev": true,
+            "requires": {
+                "agent-base": "^4.3.0",
+                "debug": "^3.1.0"
+            }
+        },
+        "inflight": {
+            "version": "1.0.6",
+            "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+            "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+            "dev": true,
+            "requires": {
+                "once": "^1.3.0",
+                "wrappy": "1"
+            }
+        },
+        "inherits": {
+            "version": "2.0.4",
+            "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+            "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+            "dev": true
+        },
+        "minimatch": {
+            "version": "3.0.4",
+            "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+            "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+            "dev": true,
+            "requires": {
+                "brace-expansion": "^1.1.7"
+            }
+        },
+        "ms": {
+            "version": "2.0.0",
+            "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+            "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+            "dev": true
+        },
+        "once": {
+            "version": "1.4.0",
+            "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+            "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+            "dev": true,
+            "requires": {
+                "wrappy": "1"
+            }
+        },
+        "path-is-absolute": {
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+            "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+            "dev": true
+        },
+        "rimraf": {
+            "version": "2.7.1",
+            "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+            "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+            "dev": true,
+            "requires": {
+                "glob": "^7.1.3"
+            }
+        },
+        "semver": {
+            "version": "6.3.0",
+            "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+            "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw=="
+        },
+        "vscode-jsonrpc": {
+            "version": "5.0.1",
+            "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-5.0.1.tgz",
+            "integrity": "sha512-JvONPptw3GAQGXlVV2utDcHx0BiY34FupW/kI6mZ5x06ER5DdPG/tXWMVHjTNULF5uKPOUUD0SaXg5QaubJL0A=="
+        },
+        "vscode-languageclient": {
+            "version": "6.1.3",
+            "resolved": "https://registry.npmjs.org/vscode-languageclient/-/vscode-languageclient-6.1.3.tgz",
+            "integrity": "sha512-YciJxk08iU5LmWu7j5dUt9/1OLjokKET6rME3cI4BRpiF6HZlusm2ZwPt0MYJ0lV5y43sZsQHhyon2xBg4ZJVA==",
+            "requires": {
+                "semver": "^6.3.0",
+                "vscode-languageserver-protocol": "^3.15.3"
+            }
+        },
+        "vscode-languageserver-protocol": {
+            "version": "3.15.3",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver-protocol/-/vscode-languageserver-protocol-3.15.3.tgz",
+            "integrity": "sha512-zrMuwHOAQRhjDSnflWdJG+O2ztMWss8GqUUB8dXLR/FPenwkiBNkMIJJYfSN6sgskvsF0rHAoBowNQfbyZnnvw==",
+            "requires": {
+                "vscode-jsonrpc": "^5.0.1",
+                "vscode-languageserver-types": "3.15.1"
+            }
+        },
+        "vscode-languageserver-types": {
+            "version": "3.15.1",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.15.1.tgz",
+            "integrity": "sha512-+a9MPUQrNGRrGU630OGbYVQ+11iOIovjCkqxajPa9w57Sd5ruK8WQNsslzpa0x/QJqC8kRc2DUxWjIFwoNm4ZQ=="
+        },
+        "vscode-test": {
+            "version": "1.4.0",
+            "resolved": "https://registry.npmjs.org/vscode-test/-/vscode-test-1.4.0.tgz",
+            "integrity": "sha512-Jt7HNGvSE0+++Tvtq5wc4hiXLIr2OjDShz/gbAfM/mahQpy4rKBnmOK33D+MR67ATWviQhl+vpmU3p/qwSH/Pg==",
+            "dev": true,
+            "requires": {
+                "http-proxy-agent": "^2.1.0",
+                "https-proxy-agent": "^2.2.4",
+                "rimraf": "^2.6.3"
+            }
+        },
+        "wrappy": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+            "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+            "dev": true
+        }
+    }
+}
diff --git a/client/package.json b/client/package.json
new file mode 100644
index 0000000..267a382
--- /dev/null
+++ b/client/package.json
@@ -0,0 +1,23 @@
+{
+    "name": "python-mro-client",
+    "description": "The client part of the Python MRO extension",
+    "author": {
+        "name": "Kaiyan"
+    },
+    "license": "MIT",
+    "version": "0.0.1",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/mosckital/vscode_python_mro"
+    },
+    "engines": {
+        "vscode": "^1.22.0"
+    },
+    "dependencies": {
+        "vscode-languageclient": "^6.1.3"
+    },
+    "devDependencies": {
+        "@types/vscode": "^1.14.0",
+        "vscode-test": "^1.4.0"
+    }
+}
diff --git a/client/src/extension.ts b/client/src/extension.ts
new file mode 100644
index 0000000..93a91f7
--- /dev/null
+++ b/client/src/extension.ts
@@ -0,0 +1,58 @@
+import * as path from "path";
+import {
+    LanguageClient, ServerOptions, TransportKind, LanguageClientOptions
+} from 'vscode-languageclient';
+import { ExtensionContext, window, commands } from "vscode";
+
+let client : LanguageClient;
+
+export function activate(context: ExtensionContext) {
+    // get the absolute path of the compiled server.js
+    let serverModule = context.asAbsolutePath(path.join('server', 'out', 'server.js'));
+    // the extra options for debug
+    // --inspect=6009: runs the server in Node's Inspector mode so VS Code can attach to the server for debugging
+    let debugOptions = {
+        execArgv: ['--nolazy', '--inspect=6009']
+    };
+    // all possible server options, currently two: run mode & debug mode
+    let serverOptions: ServerOptions = {
+        run: {module: serverModule, transport: TransportKind.ipc},
+        debug: {
+            module: serverModule,
+            transport: TransportKind.ipc,
+            options: debugOptions
+        }
+    };
+    // the language client options
+    let clientOptions: LanguageClientOptions = {
+        documentSelector: [{ scheme: 'file', language: 'python' }]
+    };
+
+    // create the language client
+    client = new LanguageClient(
+        'pythonMro',
+        'Python MRO',
+        serverOptions,
+        clientOptions
+    );
+
+    // define the command handler for the show MRO command
+    let showMroCommand = 'pythonMRO.showMRO';
+    const showMroHandler = (content: string = 'No MRO List provided!') => {
+        // show the MRO list in the right bottom pop-up box
+        window.showInformationMessage(content);
+    };
+
+    context.subscriptions.push(commands.registerCommand(showMroCommand, showMroHandler));
+
+    // start the client
+    // this will also launch the server by launching the complied script
+    client.start();
+}
+
+export function deactivate(): Thenable<void> | undefined {
+    if (!client) {
+        return undefined;
+    }
+    return client.stop();
+}
\ No newline at end of file
diff --git a/client/src/test/codeLens.test.ts b/client/src/test/codeLens.test.ts
new file mode 100644
index 0000000..09c8c7c
--- /dev/null
+++ b/client/src/test/codeLens.test.ts
@@ -0,0 +1,25 @@
+import * as vscode from 'vscode';
+import * as assert from 'assert';
+import { getDocUri, activate } from './helper';
+
+suite('Should show CodeLens', () => {
+	const docUri = getDocUri('diamond.py');
+
+	test('Show CodeLenses in diamond.py', async () => {
+		await testCodeLens(docUri, 4);
+	});
+});
+
+async function testCodeLens(
+	docUri: vscode.Uri,
+	expectedCodeLensNumber: number
+) {
+	await activate(docUri);
+	const actualCodeLenses = (await vscode.commands.executeCommand(
+		'vscode.executeCodeLensProvider',
+		docUri
+	)) as vscode.CodeLens[];
+	assert.ok(actualCodeLenses.length === expectedCodeLensNumber);
+	// TODO: to add the check for the contents once the functionality has been
+	// fully implemented
+}
\ No newline at end of file
diff --git a/client/src/test/helper.ts b/client/src/test/helper.ts
new file mode 100644
index 0000000..e087e70
--- /dev/null
+++ b/client/src/test/helper.ts
@@ -0,0 +1,47 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+
+import * as vscode from 'vscode';
+import * as path from 'path';
+
+export let doc: vscode.TextDocument;
+export let editor: vscode.TextEditor;
+export let documentEol: string;
+export let platformEol: string;
+
+/**
+ * Activates the vscode.lsp-sample extension
+ */
+export async function activate(docUri: vscode.Uri) {
+	// The extensionId is `publisher.name` from package.json
+	const ext = vscode.extensions.getExtension('kaiyan.python-mro')!;
+	await ext.activate();
+	try {
+		doc = await vscode.workspace.openTextDocument(docUri);
+		editor = await vscode.window.showTextDocument(doc);
+		await sleep(2000); // Wait for server activation
+	} catch (e) {
+		console.error(e);
+	}
+}
+
+async function sleep(ms: number) {
+	return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+export const getDocPath = (p: string) => {
+	return path.resolve(__dirname, '../../../tests/examples', p);
+};
+export const getDocUri = (p: string) => {
+	return vscode.Uri.file(getDocPath(p));
+};
+
+export async function setTestContent(content: string): Promise<boolean> {
+	const all = new vscode.Range(
+		doc.positionAt(0),
+		doc.positionAt(doc.getText().length)
+	);
+	return editor.edit(eb => eb.replace(all, content));
+}
\ No newline at end of file
diff --git a/client/src/test/hover.test.ts b/client/src/test/hover.test.ts
new file mode 100644
index 0000000..b0805a2
--- /dev/null
+++ b/client/src/test/hover.test.ts
@@ -0,0 +1,42 @@
+import * as vscode from 'vscode';
+import * as assert from 'assert';
+import { getDocUri, activate } from './helper';
+
+suite('Should show Hover', () => {
+	const docUri = getDocUri('diamond.py');
+
+	test('Show Hover in diamond.py', async () => {
+		await testHover(docUri, new vscode.Position(9, 3));
+	});
+});
+
+async function testHover(
+	docUri: vscode.Uri,
+	hoverPosition: vscode.Position
+) {
+	await activate(docUri);
+	const actualHoverResults = (await vscode.commands.executeCommand(
+		'vscode.executeHoverProvider',
+		docUri,
+		hoverPosition,
+	)) as vscode.Hover[];
+	assert.ok(actualHoverResults.length > 0);
+	let foundMRO = false;
+	actualHoverResults.forEach(hover => {
+		if (hover.contents.length > 0) {
+			let firstLine = hover.contents[0];
+			let firstLineContent: string;
+			if (typeof firstLine === 'string') {
+				firstLineContent = firstLine;
+			} else {
+				firstLineContent = firstLine.value;
+			}
+			if (firstLineContent === 'Target class name') {
+				foundMRO = true;
+			}
+		}
+	});
+	assert.ok(foundMRO);
+	// TODO: to add the check for the contents once the functionality has been
+	// fully implemented
+}
\ No newline at end of file
diff --git a/client/src/test/index.ts b/client/src/test/index.ts
new file mode 100644
index 0000000..9e1060e
--- /dev/null
+++ b/client/src/test/index.ts
@@ -0,0 +1,43 @@
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+import * as path from 'path';
+import * as Mocha from 'mocha';
+import * as glob from 'glob';
+
+export function run(): Promise<void> {
+	// Create the mocha test
+	const mocha = new Mocha({
+		ui: 'tdd',
+	});
+	mocha.useColors(true);
+	mocha.timeout(100000);
+
+	const testsRoot = __dirname;
+
+	return new Promise((resolve, reject) => {
+		glob('**.test.js', { cwd: testsRoot }, (err, files) => {
+			if (err) {
+				return reject(err);
+			}
+
+			// Add files to the test suite
+			files.forEach(f => mocha.addFile(path.resolve(testsRoot, f)));
+
+			try {
+				// Run the mocha test
+				mocha.run(failures => {
+					if (failures > 0) {
+						reject(new Error(`${failures} tests failed.`));
+					} else {
+						resolve();
+					}
+				});
+			} catch (err) {
+				console.error(err);
+				reject(err);
+			}
+		});
+	});
+}
\ No newline at end of file
diff --git a/client/src/test/runTest.ts b/client/src/test/runTest.ts
new file mode 100644
index 0000000..3361768
--- /dev/null
+++ b/client/src/test/runTest.ts
@@ -0,0 +1,27 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+import * as path from 'path';
+
+import { runTests } from 'vscode-test';
+
+async function main() {
+	try {
+		// The folder containing the Extension Manifest package.json
+		// Passed to `--extensionDevelopmentPath`
+		const extensionDevelopmentPath = path.resolve(__dirname, '../../../');
+
+		// The path to test runner
+		// Passed to --extensionTestsPath
+		const extensionTestsPath = path.resolve(__dirname, './index');
+
+		// Download VS Code, unzip it and run the integration test
+		await runTests({ extensionDevelopmentPath, extensionTestsPath });
+	} catch (err) {
+		console.error('Failed to run tests');
+		process.exit(1);
+	}
+}
+
+main();
\ No newline at end of file
diff --git a/client/tsconfig.json b/client/tsconfig.json
new file mode 100644
index 0000000..db2f053
--- /dev/null
+++ b/client/tsconfig.json
@@ -0,0 +1,12 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "ES2019",
+        "lib": ["ES2019"],
+        "outDir": "out",
+        "rootDir": "src",
+        "sourceMap": true
+    },
+    "include": ["src"],
+    "exclude": ["node_modules", ".vscode-test"]
+}
\ No newline at end of file
diff --git a/extension-readme.md b/extension-readme.md
new file mode 100644
index 0000000..aa9f408
--- /dev/null
+++ b/extension-readme.md
@@ -0,0 +1,65 @@
+# vscode-python-mro README
+
+This is the README for your extension "vscode-python-mro". After writing up a brief description, we recommend including the following sections.
+
+## Features
+
+Describe specific features of your extension including screenshots of your extension in action. Image paths are relative to this README file.
+
+For example if there is an image subfolder under your extension project workspace:
+
+\!\[feature X\]\(images/feature-x.png\)
+
+> Tip: Many popular extensions utilize animations. This is an excellent way to show off your extension! We recommend short, focused animations that are easy to follow.
+
+## Requirements
+
+If you have any requirements or dependencies, add a section describing those and how to install and configure them.
+
+## Extension Settings
+
+Include if your extension adds any VS Code settings through the `contributes.configuration` extension point.
+
+For example:
+
+This extension contributes the following settings:
+
+* `myExtension.enable`: enable/disable this extension
+* `myExtension.thing`: set to `blah` to do something
+
+## Known Issues
+
+Calling out known issues can help limit users opening duplicate issues against your extension.
+
+## Release Notes
+
+Users appreciate release notes as you update your extension.
+
+### 1.0.0
+
+Initial release of ...
+
+### 1.0.1
+
+Fixed issue #.
+
+### 1.1.0
+
+Added features X, Y, and Z.
+
+-----------------------------------------------------------------------------------------------------------
+
+## Working with Markdown
+
+**Note:** You can author your README using Visual Studio Code.  Here are some useful editor keyboard shortcuts:
+
+* Split the editor (`Cmd+\` on macOS or `Ctrl+\` on Windows and Linux)
+* Toggle preview (`Shift+CMD+V` on macOS or `Shift+Ctrl+V` on Windows and Linux)
+* Press `Ctrl+Space` (Windows, Linux) or `Cmd+Space` (macOS) to see a list of Markdown snippets
+
+### For more information
+
+* [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
+* [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
+
+**Enjoy!**
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..0868b21
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,2016 @@
+{
+	"name": "python-mro",
+	"version": "0.0.1",
+	"lockfileVersion": 1,
+	"requires": true,
+	"dependencies": {
+		"@babel/code-frame": {
+			"version": "7.10.1",
+			"resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.10.1.tgz",
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+			"dev": true,
+			"requires": {
+				"@babel/highlight": "^7.10.1"
+			}
+		},
+		"@babel/helper-validator-identifier": {
+			"version": "7.10.1",
+			"resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.10.1.tgz",
+			"integrity": "sha512-5vW/JXLALhczRCWP0PnFDMCJAchlBvM7f4uk/jXritBnIa6E1KmqmtrS3yn1LAnxFBypQ3eneLuXjsnfQsgILw==",
+			"dev": true
+		},
+		"@babel/highlight": {
+			"version": "7.10.1",
+			"resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.10.1.tgz",
+			"integrity": "sha512-8rMof+gVP8mxYZApLF/JgNDAkdKa+aJt3ZYxF8z6+j/hpeXL7iMsKCPHa2jNMHu/qqBwzQF4OHNoYi8dMA/rYg==",
+			"dev": true,
+			"requires": {
+				"@babel/helper-validator-identifier": "^7.10.1",
+				"chalk": "^2.0.0",
+				"js-tokens": "^4.0.0"
+			}
+		},
+		"@types/color-name": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
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+			"dev": true
+		},
+		"@types/eslint-visitor-keys": {
+			"version": "1.0.0",
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+			"dev": true
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+			"dev": true
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+			"version": "1.46.0",
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+				"eslint-scope": "^5.0.0",
+				"eslint-utils": "^2.0.0"
+			}
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+		},
+		"@typescript-eslint/typescript-estree": {
+			"version": "2.34.0",
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+				"semver": "^7.3.2",
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..86e9a16
--- /dev/null
+++ b/package.json
@@ -0,0 +1,80 @@
+{
+	"name": "python-mro",
+	"displayName": "Python MRO",
+	"description": "To show the MRO (Method Resolution Order) of a Python class in VS Code.",
+	"author": {
+		"name": "Kaiyan"
+	},
+	"publisher": "kaiyan",
+	"version": "0.0.1",
+	"license": "MIT",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/mosckital/vscode_python_mro"
+	},
+	"engines": {
+		"vscode": "^1.46.0"
+	},
+	"categories": [],
+	"keywords": [
+		"Python MRO Method Resolution Order"
+	],
+	"activationEvents": [
+		"onLanguage:python"
+	],
+	"main": "./client/out/extension.js",
+	"contributes": {
+		"configuration": {
+			"title": "PythonMRO",
+			"properties": {
+				"pythonMRO.hover.enable": {
+					"type": "boolean",
+					"description": "Enable to show the MRO list when hovering over a class or an object of which type can be inferred",
+					"default": "true"
+				},
+				"pythonMRO.hoverMethod.enable": {
+					"type": "boolean",
+					"description": "Enable to show the actual fulfilling class when hovering over a method calling from a class or an object of which type can be inferred",
+					"default": "true"
+				},
+				"pythonMRO.trace.server": {
+					"scope": "window",
+					"type": "string",
+					"enum": [
+						"off",
+						"messages",
+						"verbose"
+					],
+					"default": "off",
+					"description": "Traces the communication between VS Code and the language server."
+				}
+			}
+		},
+		"commands": [
+			{
+				"command": "pythonMRO.showMRO",
+				"title": "Show MRO list"
+			}
+		]
+	},
+	"scripts": {
+		"vscode:prepublish": "npm run compile",
+		"compile": "tsc -b",
+		"watch": "tsc -b -w",
+		"postinstall": "cd client && npm install && cd ../server && npm install && cd ..",
+		"test": "sh ./tests/e2e.sh"
+	},
+	"devDependencies": {
+		"@types/vscode": "^1.46.0",
+		"@types/glob": "^7.1.1",
+		"@types/mocha": "^7.0.2",
+		"@types/node": "^13.11.0",
+		"eslint": "^6.8.0",
+		"@typescript-eslint/parser": "^2.30.0",
+		"@typescript-eslint/eslint-plugin": "^2.30.0",
+		"glob": "^7.1.6",
+		"mocha": "^7.1.2",
+		"typescript": "^3.8.3",
+		"vscode-test": "^1.3.0"
+	}
+}
diff --git a/server/package-lock.json b/server/package-lock.json
new file mode 100644
index 0000000..cd121be
--- /dev/null
+++ b/server/package-lock.json
@@ -0,0 +1,40 @@
+{
+    "name": "python-mro-server",
+    "version": "0.0.1",
+    "lockfileVersion": 1,
+    "requires": true,
+    "dependencies": {
+        "vscode-jsonrpc": {
+            "version": "5.0.1",
+            "resolved": "https://registry.npmjs.org/vscode-jsonrpc/-/vscode-jsonrpc-5.0.1.tgz",
+            "integrity": "sha512-JvONPptw3GAQGXlVV2utDcHx0BiY34FupW/kI6mZ5x06ER5DdPG/tXWMVHjTNULF5uKPOUUD0SaXg5QaubJL0A=="
+        },
+        "vscode-languageserver": {
+            "version": "6.1.1",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver/-/vscode-languageserver-6.1.1.tgz",
+            "integrity": "sha512-DueEpkUAkD5XTR4MLYNr6bQIp/UFR0/IPApgXU3YfCBCB08u2sm9hRCs6DxYZELkk++STPjpcjksR2H8qI3cDQ==",
+            "requires": {
+                "vscode-languageserver-protocol": "^3.15.3"
+            }
+        },
+        "vscode-languageserver-protocol": {
+            "version": "3.15.3",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver-protocol/-/vscode-languageserver-protocol-3.15.3.tgz",
+            "integrity": "sha512-zrMuwHOAQRhjDSnflWdJG+O2ztMWss8GqUUB8dXLR/FPenwkiBNkMIJJYfSN6sgskvsF0rHAoBowNQfbyZnnvw==",
+            "requires": {
+                "vscode-jsonrpc": "^5.0.1",
+                "vscode-languageserver-types": "3.15.1"
+            }
+        },
+        "vscode-languageserver-textdocument": {
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.1.tgz",
+            "integrity": "sha512-UIcJDjX7IFkck7cSkNNyzIz5FyvpQfY7sdzVy+wkKN/BLaD4DQ0ppXQrKePomCxTS7RrolK1I0pey0bG9eh8dA=="
+        },
+        "vscode-languageserver-types": {
+            "version": "3.15.1",
+            "resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.15.1.tgz",
+            "integrity": "sha512-+a9MPUQrNGRrGU630OGbYVQ+11iOIovjCkqxajPa9w57Sd5ruK8WQNsslzpa0x/QJqC8kRc2DUxWjIFwoNm4ZQ=="
+        }
+    }
+}
diff --git a/server/package.json b/server/package.json
new file mode 100644
index 0000000..ecccaff
--- /dev/null
+++ b/server/package.json
@@ -0,0 +1,21 @@
+{
+    "name": "python-mro-server",
+    "description": "The server part of the Python MRO extension",
+    "author": {
+        "name": "Kaiyan"
+    },
+    "license": "MIT",
+    "version": "0.0.1",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/mosckital/vscode_python_mro"
+    },
+    "engines": {
+        "node": "*"
+    },
+    "dependencies": {
+        "vscode-languageserver": "^6.1.1",
+        "vscode-languageserver-textdocument": "^1.0.1"
+    },
+    "devDependencies": {}
+}
diff --git a/server/src/server.ts b/server/src/server.ts
new file mode 100644
index 0000000..c73b10d
--- /dev/null
+++ b/server/src/server.ts
@@ -0,0 +1,86 @@
+import { createConnection, ProposedFeatures, TextDocuments, InitializeParams, InitializeResult, TextDocumentSyncKind, CodeLens, CodeLensParams, CompletionItem, CompletionItemKind, TextDocumentPositionParams, HoverParams, Hover } from 'vscode-languageserver';
+import { TextDocument } from 'vscode-languageserver-textdocument';
+
+// create a connection for the server
+let connection = createConnection(ProposedFeatures.all);
+
+// create a simple text document manager
+let documents: TextDocuments<TextDocument> = new TextDocuments(TextDocument);
+
+connection.onInitialize((params: InitializeParams) => {
+    // simply return the server capabilities
+    console.log('Initialising Python MRO language server.');
+    const result: InitializeResult = {
+        capabilities: {
+            textDocumentSync: TextDocumentSyncKind.Incremental,
+            codeLensProvider: {
+                resolveProvider: true
+            },
+            hoverProvider: true
+        }
+    };
+    return result;
+});
+
+// function to identify the CodeLenses in a document
+function findClassInTextDocument(textDocument: TextDocument): CodeLens[] {
+    console.log(`Searching Python classes in ${textDocument.uri}`);
+    // initiate search scope and pattern
+    let text = textDocument.getText();
+    let pattern = /\bclass\b/g;
+    let m: RegExpExecArray | null;
+    // find classes and create CodeLenses one by one
+    let codeLenses: CodeLens[] = [];
+    while (m = pattern.exec(text)) {
+        let codeLens: CodeLens = {
+            range: {
+                start: textDocument.positionAt(m.index),
+                end: textDocument.positionAt(m.index + m[0].length)
+            }
+        };
+        codeLenses.push(codeLens);
+    }
+    console.log(`${codeLenses.length} CodeLens have been found in ${textDocument.uri}`);
+    return codeLenses;
+};
+
+connection.onCodeLens((codeLensParams: CodeLensParams): CodeLens[] => {
+    console.log('Inside onCodeLens() for ' + codeLensParams.textDocument.uri);
+    let textDocument = documents.get(codeLensParams.textDocument.uri);
+    if (textDocument){
+        return findClassInTextDocument(textDocument);
+    }
+    return [];
+});
+
+connection.onCodeLensResolve((lens: CodeLens): CodeLens => {
+    console.log(`Resolving CodeLens ${lens}`);
+    lens.command = {
+        command: 'pythonMRO.showMRO',
+        title: 'Show MRO list',
+        arguments: [
+            'Fake MRO List L1\nFake MRO List L2\nFake MRO List L3'
+        ]
+    };
+    return lens;
+});
+
+connection.onHover((hoverParams: HoverParams): Hover => {
+    console.log(`Providing Hover in ${hoverParams.textDocument.uri} for line ${hoverParams.position.line} char ${hoverParams.position.character}`);
+    let hover: Hover = {
+        contents: [
+            'Target class name',
+            'Parent class 1',
+            'Parent class 2',
+            '...',
+            'Object'
+        ]
+    };
+    return hover;
+});
+
+console.log('Python MRO language server registered callbacks.');
+
+documents.listen(connection);
+
+connection.listen();
\ No newline at end of file
diff --git a/server/tsconfig.json b/server/tsconfig.json
new file mode 100644
index 0000000..0a22767
--- /dev/null
+++ b/server/tsconfig.json
@@ -0,0 +1,14 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "ES2019",
+        "lib": ["ES2019"],
+        "outDir": "out",
+        "rootDir": "src",
+        "sourceMap": true,
+        "moduleResolution": "node",
+        "strict": true
+    },
+    "include": ["src"],
+    "exclude": ["node_modules", ".vscode-test"]
+}
\ No newline at end of file
diff --git a/tests/e2e.sh b/tests/e2e.sh
new file mode 100644
index 0000000..7ad268a
--- /dev/null
+++ b/tests/e2e.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+export CODE_TESTS_PATH="$(pwd)/client/out/test"
+export CODE_TESTS_WORKSPACE="$(pwd)/tests/examples"
+
+node "$(pwd)/client/out/test/runTest"
\ No newline at end of file
diff --git a/tests/examples/__init__.py b/tests/examples/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/examples/diamond.py b/tests/examples/diamond.py
new file mode 100644
index 0000000..3e5350d
--- /dev/null
+++ b/tests/examples/diamond.py
@@ -0,0 +1,22 @@
+"""The classic diamond problem for multiple inheritance.
+"""
+from typing import TypeVar, Generic
+
+
+T = TypeVar('T')  # generic type for data
+
+
+class A(Generic[T]):
+    pass
+
+
+class B(A):
+    pass
+
+
+class C(A):
+    pass
+
+
+class D(B, C):
+    pass
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..f3fed2e
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,28 @@
+{
+	"compilerOptions": {
+		"module": "commonjs",
+		"target": "ES2019",
+		"outDir": "out",
+		"lib": [
+			"ES2019"
+		],
+		"sourceMap": true,
+		"rootDir": "src",
+		// "strict": true   /* enable all strict type-checking options */
+		/* Additional Checks */
+		// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
+		// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
+		// "noUnusedParameters": true,  /* Report errors on unused parameters. */
+	},
+	"include": [
+		"src"
+	],
+	"exclude": [
+		"node_modules",
+		".vscode-test"
+	],
+	"references": [
+		{"path": "./client"},
+		{"path": "./server"}
+	]
+}
diff --git a/vsc-extension-quickstart.md b/vsc-extension-quickstart.md
new file mode 100644
index 0000000..b510bff
--- /dev/null
+++ b/vsc-extension-quickstart.md
@@ -0,0 +1,42 @@
+# Welcome to your VS Code Extension
+
+## What's in the folder
+
+* This folder contains all of the files necessary for your extension.
+* `package.json` - this is the manifest file in which you declare your extension and command.
+  * The sample plugin registers a command and defines its title and command name. With this information VS Code can show the command in the command palette. It doesn’t yet need to load the plugin.
+* `src/extension.ts` - this is the main file where you will provide the implementation of your command.
+  * The file exports one function, `activate`, which is called the very first time your extension is activated (in this case by executing the command). Inside the `activate` function we call `registerCommand`.
+  * We pass the function containing the implementation of the command as the second parameter to `registerCommand`.
+
+## Get up and running straight away
+
+* Press `F5` to open a new window with your extension loaded.
+* Run your command from the command palette by pressing (`Ctrl+Shift+P` or `Cmd+Shift+P` on Mac) and typing `Hello World`.
+* Set breakpoints in your code inside `src/extension.ts` to debug your extension.
+* Find output from your extension in the debug console.
+
+## Make changes
+
+* You can relaunch the extension from the debug toolbar after changing code in `src/extension.ts`.
+* You can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes.
+
+
+## Explore the API
+
+* You can open the full set of our API when you open the file `node_modules/@types/vscode/index.d.ts`.
+
+## Run tests
+
+* Open the debug viewlet (`Ctrl+Shift+D` or `Cmd+Shift+D` on Mac) and from the launch configuration dropdown pick `Extension Tests`.
+* Press `F5` to run the tests in a new window with your extension loaded.
+* See the output of the test result in the debug console.
+* Make changes to `src/test/suite/extension.test.ts` or create new test files inside the `test/suite` folder.
+  * The provided test runner will only consider files matching the name pattern `**.test.ts`.
+  * You can create folders inside the `test` folder to structure your tests any way you want.
+
+## Go further
+
+ * Reduce the extension size and improve the startup time by [bundling your extension](https://code.visualstudio.com/api/working-with-extensions/bundling-extension).
+ * [Publish your extension](https://code.visualstudio.com/api/working-with-extensions/publishing-extension) on the VSCode extension marketplace.
+ * Automate builds by setting up [Continuous Integration](https://code.visualstudio.com/api/working-with-extensions/continuous-integration).