diff --git a/Journal.App/package.json b/Journal.App/package.json
index cece5f0..78b0b3a 100644
--- a/Journal.App/package.json
+++ b/Journal.App/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "dev": "vite dev",
     "build": "vite build",
-    "tauri:prebuild": "pwsh -NoProfile -ExecutionPolicy Bypass -File ../scripts/tauri-prebuild.ps1",
+    "tauri:prebuild": "node ./scripts/tauri-prebuild.mjs",
     "preview": "vite preview",
     "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
     "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
diff --git a/Journal.App/scripts/tauri-prebuild.mjs b/Journal.App/scripts/tauri-prebuild.mjs
new file mode 100644
index 0000000..cf1378a
--- /dev/null
+++ b/Journal.App/scripts/tauri-prebuild.mjs
@@ -0,0 +1,81 @@
+import { spawnSync } from "node:child_process";
+import { copyFileSync, existsSync, mkdirSync } from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const appRoot = path.resolve(__dirname, "..");
+const repoRoot = path.resolve(appRoot, "..");
+
+const sidecarProject = path.join(
+  repoRoot,
+  "Journal.Sidecar",
+  "Journal.Sidecar.csproj",
+);
+const publishOutputDir = path.join(repoRoot, "output");
+const tauriBinDir = path.join(appRoot, "src-tauri", "bin");
+
+function runtimeForCurrentPlatform() {
+  const arch = process.arch;
+  if (process.platform === "win32") {
+    if (arch === "arm64") return "win-arm64";
+    return "win-x64";
+  }
+  if (process.platform === "linux") {
+    if (arch === "arm64") return "linux-arm64";
+    return "linux-x64";
+  }
+  if (process.platform === "darwin") {
+    if (arch === "arm64") return "osx-arm64";
+    return "osx-x64";
+  }
+  throw new Error(`Unsupported platform '${process.platform}' for sidecar publish.`);
+}
+
+function sidecarFileName() {
+  return process.platform === "win32" ? "Journal.Sidecar.exe" : "Journal.Sidecar";
+}
+
+const runtime = runtimeForCurrentPlatform();
+const sidecarName = sidecarFileName();
+const publishedSidecar = path.join(publishOutputDir, sidecarName);
+const bundledSidecar = path.join(tauriBinDir, sidecarName);
+
+console.log(`Publishing sidecar for ${process.platform}/${process.arch} (${runtime})...`);
+
+const publishArgs = [
+  "publish",
+  sidecarProject,
+  "-c",
+  "Release",
+  "-r",
+  runtime,
+  "--self-contained",
+  "-p:PublishSingleFile=true",
+  "-p:IncludeNativeLibrariesForSelfExtract=true",
+  "-p:RestoreIgnoreFailedSources=true",
+  "-p:NuGetAudit=false",
+  "-o",
+  publishOutputDir,
+];
+
+const publish = spawnSync("dotnet", publishArgs, {
+  cwd: repoRoot,
+  stdio: "inherit",
+});
+
+if (publish.error) {
+  throw publish.error;
+}
+if (publish.status !== 0) {
+  process.exit(publish.status ?? 1);
+}
+
+if (!existsSync(publishedSidecar)) {
+  throw new Error(`Published sidecar not found: ${publishedSidecar}`);
+}
+
+mkdirSync(tauriBinDir, { recursive: true });
+copyFileSync(publishedSidecar, bundledSidecar);
+console.log(`Staged sidecar for Tauri: ${bundledSidecar}`);
diff --git a/Journal.App/src-tauri/tauri.conf.json b/Journal.App/src-tauri/tauri.conf.json
index 0a5189e..4b23224 100644
--- a/Journal.App/src-tauri/tauri.conf.json
+++ b/Journal.App/src-tauri/tauri.conf.json
@@ -25,7 +25,7 @@
     "active": true,
     "targets": "all",
     "resources": [
-      "bin/Journal.Sidecar.exe"
+      "bin"
     ],
     "icon": [
       "icons/32x32.png",
diff --git a/scripts/tauri-prebuild.ps1 b/scripts/tauri-prebuild.ps1
deleted file mode 100644
index 0dbb93f..0000000
--- a/scripts/tauri-prebuild.ps1
+++ /dev/null
@@ -1,52 +0,0 @@
-param(
-    [ValidateSet("Release", "Debug")]
-    [string]$Configuration = "Release",
-    [string]$Runtime = "win-x64"
-)
-
-$ErrorActionPreference = "Stop"
-
-$repoRoot = Resolve-Path (Join-Path $PSScriptRoot "..")
-$sidecarProject = Join-Path $repoRoot "Journal.Sidecar\Journal.Sidecar.csproj"
-$publishOutputDir = Join-Path $repoRoot "output"
-$publishedSidecarExe = Join-Path $publishOutputDir "Journal.Sidecar.exe"
-$tauriBinDir = Join-Path $repoRoot "Journal.App\src-tauri\bin"
-$tauriBundledSidecarExe = Join-Path $tauriBinDir "Journal.Sidecar.exe"
-
-if (-not (Get-Command dotnet -ErrorAction SilentlyContinue)) {
-    throw "dotnet was not found in PATH. Install .NET SDK and retry."
-}
-
-if (-not (Test-Path $sidecarProject)) {
-    throw "Sidecar project not found: $sidecarProject"
-}
-
-New-Item -ItemType Directory -Force -Path $publishOutputDir | Out-Null
-
-$publishArgs = @(
-    "publish", $sidecarProject,
-    "-c", $Configuration,
-    "-r", $Runtime,
-    "--self-contained",
-    "-p:PublishSingleFile=true",
-    "-p:IncludeNativeLibrariesForSelfExtract=true",
-    "-p:RestoreIgnoreFailedSources=true",
-    "-p:NuGetAudit=false",
-    "-o", $publishOutputDir
-)
-
-Write-Host "Publishing Journal.Sidecar for Tauri bundle..." -ForegroundColor Cyan
-Write-Host "> dotnet $($publishArgs -join ' ')" -ForegroundColor DarkGray
-& dotnet @publishArgs
-
-if ($LASTEXITCODE -ne 0) {
-    throw "dotnet publish failed with exit code $LASTEXITCODE."
-}
-
-if (-not (Test-Path $publishedSidecarExe)) {
-    throw "Sidecar publish output not found: $publishedSidecarExe"
-}
-
-New-Item -ItemType Directory -Force -Path $tauriBinDir | Out-Null
-Copy-Item -Force $publishedSidecarExe $tauriBundledSidecarExe
-Write-Host "Staged sidecar for Tauri: $tauriBundledSidecarExe" -ForegroundColor Green