diff --git a/internal/app/discord.go b/internal/app/discord.go
new file mode 100644
index 0000000..02dba8a
--- /dev/null
+++ b/internal/app/discord.go
@@ -0,0 +1,122 @@
+package app
+
+import (
+	"fmt"
+	"log"
+	"os/exec"
+)
+
+func pressDiscordMuteHotkey() error {
+	script := `
+$ErrorActionPreference = "Stop"
+
+Add-Type @"
+using System;
+using System.Runtime.InteropServices;
+public static class Win32 {
+  [StructLayout(LayoutKind.Sequential)]
+  public struct RECT {
+    public int Left;
+    public int Top;
+    public int Right;
+    public int Bottom;
+  }
+  [DllImport("user32.dll")]
+  public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
+  [DllImport("user32.dll")]
+  public static extern bool SetCursorPos(int X, int Y);
+  [DllImport("user32.dll")]
+  public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, UIntPtr dwExtraInfo);
+}
+"@
+
+function Click-WindowCenter($p) {
+  if ($null -eq $p) { return }
+  $hWnd = [IntPtr]$p.MainWindowHandle
+  if ($hWnd -eq [IntPtr]::Zero) { return }
+
+  $rect = New-Object 'Win32+RECT'
+  if (-not [Win32]::GetWindowRect($hWnd, [ref]$rect)) { return }
+
+  $x = [int](($rect.Left + $rect.Right) / 2)
+  $y = [int](($rect.Top + $rect.Bottom) / 2)
+  [Win32]::SetCursorPos($x, $y) | Out-Null
+  Start-Sleep -Milliseconds 50
+  [Win32]::mouse_event(0x0002, 0, 0, 0, [UIntPtr]::Zero)
+  [Win32]::mouse_event(0x0004, 0, 0, 0, [UIntPtr]::Zero)
+  Start-Sleep -Milliseconds 100
+}
+
+function Get-DiscordWindows {
+  $windows = foreach ($p in Get-Process) {
+    $title = ($p.MainWindowTitle | Out-String).Trim()
+    if (-not $title) { continue }
+    if (-not $title.ToLower().Contains('discord')) { continue }
+    $p
+  }
+  if (-not $windows) { return @() }
+  return $windows
+}
+
+function Get-BestDiscordWindow {
+  $windows = Get-DiscordWindows
+  if (-not $windows -or $windows.Count -eq 0) { return $null }
+
+  $browserKeywords = @('google chrome', 'microsoft edge', 'mozilla firefox', 'brave', 'opera')
+  $ranked = $windows | Sort-Object {
+    $title = ($_.MainWindowTitle | Out-String).Trim().ToLower()
+    $score = 0
+    foreach ($keyword in $browserKeywords) {
+      if ($title.Contains($keyword)) { $score += 10 }
+    }
+    if ($title -match '^\(\d+\)\s*discord') { $score += 20 }
+    if ($title.Contains('discord')) { $score += 5 }
+    $score
+  } -Descending
+
+  return $ranked | Select-Object -First 1
+}
+
+function Get-VRChatWindow {
+  $windows = Get-Process | Where-Object {
+    $_.MainWindowTitle -and (
+      $_.MainWindowTitle -eq 'VRChat' -or $_.MainWindowTitle.ToLower().StartsWith('vrchat ')
+    )
+  }
+  if (-not $windows) { return $null }
+  return $windows | Sort-Object { $_.MainWindowHandle } -Descending | Select-Object -First 1
+}
+
+function Activate-Window($p) {
+  if ($null -eq $p) { return }
+  $wshell = New-Object -ComObject WScript.Shell
+  try { $null = $wshell.AppActivate($p.Id) } catch {}
+  Start-Sleep -Milliseconds 200
+  Click-WindowCenter $p
+}
+
+$discord = Get-BestDiscordWindow
+if ($null -eq $discord) { exit 2 }
+
+Activate-Window $discord
+$wshell = New-Object -ComObject WScript.Shell
+Start-Sleep -Milliseconds 200
+$wshell.SendKeys('^+m')
+Start-Sleep -Milliseconds 200
+
+$vrchat = Get-VRChatWindow
+if ($null -ne $vrchat) {
+  Activate-Window $vrchat
+}
+`
+
+	cmd := exec.Command("powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", script)
+	out, err := cmd.CombinedOutput()
+	if len(out) > 0 {
+		log.Printf("discord mute output: %s", string(out))
+	}
+	if err != nil {
+		return fmt.Errorf("discord mute failed: %w", err)
+	}
+	return nil
+}