diff --git a/dialect.yml b/dialect.yml
new file mode 100644
index 0000000..ba619a4
--- /dev/null
+++ b/dialect.yml
@@ -0,0 +1,51 @@
+version: 4
+
+output:
+    ver-mac/src/dialect.swift:
+        type: swift
+
+RootComponent:
+    type: component
+    oneliners:
+        - countText: print(c.countText)
+        - countText: RootVM.shared!.countText = c.countText
+    shoulds:
+        count:
+            1. Upon hitting 10 the first time:
+                if:
+                    c.recentField == F.didClickIncrement &&
+                    c.count == 7
+                then:
+                    c.count += 10
+            2. Upon each button click:
+                if:
+                    c.recentField == F.didClickIncrement
+                then:
+                    c.count += 1
+        countText:
+            1. Upon each count change
+                if:
+                    c.recentField == F.count
+                then:
+                    c.countText = "Count: '\(c.count)'"
+            2. Upon launch
+                if:
+                    c.recentField == F.didLaunch
+                then:
+                    c.countText = "Press the button to count"
+        didLaunch:
+            1. Only once during the first setup:
+                if:
+                    c.recentField == F.didSetup &&
+                    c.didLaunch == false
+                then:
+                    c.didLaunch = true
+
+RootContext:
+    type: context
+    fields:
+        count: Int
+        countText: String
+        didClickIncrement: Bool
+        didLaunch: Bool
+        didSetup: Bool
diff --git a/game/ver-mac/Info.plist b/game/ver-mac/Info.plist
new file mode 100644
index 0000000..dc46284
--- /dev/null
+++ b/game/ver-mac/Info.plist
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleName</key>
+    <string>OGS Mahjong</string>
+    <key>CFBundleDisplayName</key>
+    <string>OGS Mahjong</string>
+    <key>CFBundleIdentifier</key>
+    <string>org.opengamestudio.Mahjong</string>
+    <key>CFBundleExecutable</key>
+    <string>ogs-mahjong</string>
+    <key>CFBundleIconFile</key>
+    <string>AppIcon</string>
+    <key>CFBundlePackageType</key>
+    <string>APPL</string>
+    <key>CFBundleShortVersionString</key>
+    <string>2.0.0</string>
+    <key>CFBundleVersion</key>
+    <string>1</string>
+    <key>LSMinimumSystemVersion</key>
+    <string>11.0</string>
+    <key>NSHighResolutionCapable</key>
+    <true/>
+</dict>
+</plist>
diff --git a/game/ver-mac/Package.swift b/game/ver-mac/Package.swift
new file mode 100644
index 0000000..e2b4221
--- /dev/null
+++ b/game/ver-mac/Package.swift
@@ -0,0 +1,15 @@
+// swift-tools-version: 5.9
+import PackageDescription
+
+let package = Package(
+    name: "OGSMahjong",
+    platforms: [
+        .macOS(.v13)
+    ],
+    targets: [
+        .executableTarget(
+            name: "ogs-mahjong",
+            path: "src"
+        )
+    ]
+)
diff --git a/game/ver-mac/Resources/AppIcon.icns b/game/ver-mac/Resources/AppIcon.icns
new file mode 100644
index 0000000..0fb5686
Binary files /dev/null and b/game/ver-mac/Resources/AppIcon.icns differ
diff --git a/game/ver-mac/src/AppDelegate.swift b/game/ver-mac/src/AppDelegate.swift
new file mode 100644
index 0000000..73db6af
--- /dev/null
+++ b/game/ver-mac/src/AppDelegate.swift
@@ -0,0 +1,21 @@
+import AppKit
+
+final class AppDelegate:
+    NSObject,
+    NSApplicationDelegate
+{
+    let root = RootComponent()
+    let rootVM = RootVM()
+
+    func applicationDidFinishLaunching(_ notification: Notification) {
+        // Bring the app to the foreground
+        NSApp.setActivationPolicy(.regular)
+        NSApp.activate(ignoringOtherApps: true)
+
+        root.setup()
+    }
+
+    func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+        true
+    }
+}
diff --git a/game/ver-mac/src/GameApp.swift b/game/ver-mac/src/GameApp.swift
new file mode 100644
index 0000000..65825ae
--- /dev/null
+++ b/game/ver-mac/src/GameApp.swift
@@ -0,0 +1,14 @@
+import AppKit
+import SwiftUI
+
+@main
+struct GameApp: App {
+    @NSApplicationDelegateAdaptor(AppDelegate.self) private var appDelegate
+
+    var body: some Scene {
+        WindowGroup {
+            RootView(appDelegate.rootVM)
+        }
+        .defaultSize(width: 640, height: 480)
+    }
+}
diff --git a/game/ver-mac/src/dialect.swift b/game/ver-mac/src/dialect.swift
new file mode 100644
index 0000000..93af8f7
--- /dev/null
+++ b/game/ver-mac/src/dialect.swift
@@ -0,0 +1,276 @@
+
+// Reusable "none" constant
+public let DIALECT_CONTEXT_RECENT_FIELD_NONE = "none"
+
+// Base protocol for each component's state
+public protocol DialectContext {
+    var recentField: String { get set }
+
+    func field<T>(_ name: String) -> T
+    func fieldAny(_ name: String) -> Any
+    mutating func setField(_ name: String, _ value: Any)
+}
+
+// Default implementation of `fieldAny` method for the protocol
+public extension DialectContext {
+    func fieldAny(_ name: String) -> Any {
+        return field(name)
+    }
+}
+
+// The engine of the dialect components
+public class DialectController {
+    var callbacks = [(DialectContext) -> Void]()
+    var context: DialectContext
+    var functions = [(DialectContext) -> DialectContext]()
+    var isProcessingQueue = false
+    var queue = [DialectContext]()
+
+    public init(_ context: DialectContext) {
+        self.context = context
+    }
+
+    func executeFunctions() {
+        let c = queue.removeFirst()
+        // Keep SSOT: Only allow single field change per should-function
+        context.recentField = c.recentField
+        context.setField(c.recentField, c.fieldAny(c.recentField))
+      
+        for f in functions {
+            let ctx = f(context)
+            if ctx.recentField != DIALECT_CONTEXT_RECENT_FIELD_NONE {
+                queue.append(ctx)
+            }
+        }
+      
+        reportContext()
+    }
+
+    func processQueue() {
+        // Prevent recursion.
+        if isProcessingQueue {
+            return
+        }
+      
+        isProcessingQueue = true
+      
+        while (queue.count > 0) {
+            executeFunctions()
+        }
+      
+        isProcessingQueue = false
+    }
+
+    public func registerCallback(_ cb: @escaping (DialectContext) -> Void) {
+        callbacks.append(cb)
+    }
+
+    public func registerFieldCallback(
+        _ fieldName: String,
+        _ cb: @escaping (DialectContext) -> Void
+    ) {
+        callbacks.append({ c in
+            if c.recentField == fieldName {
+                cb(c)
+            }
+        })
+    }
+
+    public func registerFunction(_ f: @escaping (DialectContext) -> DialectContext) {
+        functions.append(f)
+    }
+
+    func reportContext() {
+        for cb in callbacks {
+            cb(context)
+        }
+    }
+
+    public func set(
+        _ fieldName: String,
+        _ value: Any
+    ) {
+        var c = context
+        c.setField(fieldName, value)
+        c.recentField = fieldName
+        queue.append(c)
+        processQueue()
+    }
+}
+
+// Register several oneliner callbacks to a controller
+func registerOneliners<T>(
+    _ ctrl: DialectController,
+    _ items: [Any]
+) -> T? {
+    let halfCount = items.count / 2
+    for i in 0..<halfCount {
+        let field = items[i * 2] as! String
+        let callback = items[i * 2 + 1] as! (T) -> Void
+        ctrl.registerFieldCallback(field) { cc in
+            let c = cc as! T
+            callback(c)
+        }
+    }
+
+    // A hack for generics to operate
+    return nil
+}
+
+// Context field names for static type check
+struct F {
+    static let count = "count"
+    static let countText = "countText"
+    static let didClickIncrement = "didClickIncrement"
+    static let didLaunch = "didLaunch"
+    static let didSetup = "didSetup"
+
+}
+struct RootContext: DialectContext {
+    var count = Int()
+    var countText = String()
+    var didClickIncrement = Bool()
+    var didLaunch = Bool()
+    var didSetup = Bool()
+
+    var recentField = ""
+
+    func field<T>(_ name: String) -> T {
+        if (name == "count") {
+            return count as! T
+        }
+        else if (name == "countText") {
+            return countText as! T
+        }
+        else if (name == "didClickIncrement") {
+            return didClickIncrement as! T
+        }
+        else if (name == "didLaunch") {
+            return didLaunch as! T
+        }
+        else if (name == "didSetup") {
+            return didSetup as! T
+        }
+
+        return "unknown-field-name" as! T
+    }
+
+    mutating func setField(
+        _ name: String,
+        _ value: Any
+    ) {
+        if (name == "count") {
+            count = value as! Int
+        }
+        else if (name == "countText") {
+            countText = value as! String
+        }
+        else if (name == "didClickIncrement") {
+            didClickIncrement = value as! Bool
+        }
+        else if (name == "didLaunch") {
+            didLaunch = value as! Bool
+        }
+        else if (name == "didSetup") {
+            didSetup = value as! Bool
+        }
+
+    }
+}
+
+func rootSet(
+    _ key: String,
+    _ value: Any
+) {
+    RootComponent.singleton!.ctrl.set(key, value)
+}
+
+func rootShouldResetCount(_ c: RootContext) -> RootContext {
+    var c = c
+
+    /* 1. Upon hitting 10 the first time */
+    if
+        c.recentField == F.didClickIncrement &&
+        c.count == 7
+    {
+        c.count += 10
+        c.recentField = F.count
+        return c
+    }
+
+    /* 2. Upon each button click */
+    if
+        c.recentField == F.didClickIncrement
+    {
+        c.count += 1
+        c.recentField = F.count
+        return c
+    }
+
+
+    c.recentField = DIALECT_CONTEXT_RECENT_FIELD_NONE
+    return c
+}
+
+func rootShouldResetCountText(_ c: RootContext) -> RootContext {
+    var c = c
+
+    /* 1. Upon each count chang */
+    if
+        c.recentField == F.count
+    {
+        c.countText = "Count: '\(c.count)'"
+        c.recentField = F.countText
+        return c
+    }
+
+    /* 2. Upon launc */
+    if
+        c.recentField == F.didLaunch
+    {
+        c.countText = "Press the button to count"
+        c.recentField = F.countText
+        return c
+    }
+
+
+    c.recentField = DIALECT_CONTEXT_RECENT_FIELD_NONE
+    return c
+}
+
+func rootShouldResetDidLaunch(_ c: RootContext) -> RootContext {
+    var c = c
+
+    /* 1. Only once during the first setup */
+    if
+        c.recentField == F.didSetup &&
+        c.didLaunch == false
+    {
+        c.didLaunch = true
+        c.recentField = F.didLaunch
+        return c
+    }
+
+
+    c.recentField = DIALECT_CONTEXT_RECENT_FIELD_NONE
+    return c
+}
+
+func rootRegisterShoulds(_ ctrl: DialectController) {
+    [
+        rootShouldResetCount,
+        rootShouldResetCountText,
+        rootShouldResetDidLaunch,
+
+    ].forEach { f in
+        ctrl.registerFunction { c in f(c as! RootContext) }
+    }
+}
+
+func rootRegisterEffects(_ ctrl: DialectController) {
+    let _: RootContext? = registerOneliners(ctrl, [
+        F.countText, { (c: RootContext) in print(c.countText) },
+        F.countText, { (c: RootContext) in RootVM.shared!.countText = c.countText },
+
+    ])
+}