diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 29d18b0..8754f27 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -50,6 +50,7 @@ jobs:
               pacman -Syu --noconfirm git jq python libarchive
               python tests/oma-service-removal.py
               python tests/upstream-watch.py
+              python tests/obsidian-upstream.py
               ./bin/sync-upstream self-test
               ./bin/sync-rebuilds --self-test
               ./bin/omarchy-pkgs self-test
diff --git a/pkgbuilds/obsidian/.omarchy/package.json b/pkgbuilds/obsidian/.omarchy/package.json
new file mode 100644
index 0000000..2a9719d
--- /dev/null
+++ b/pkgbuilds/obsidian/.omarchy/package.json
@@ -0,0 +1,3 @@
+{
+  "source": "local"
+}
diff --git a/pkgbuilds/obsidian/.omarchy/upstream.py b/pkgbuilds/obsidian/.omarchy/upstream.py
new file mode 100644
index 0000000..3e93edf
--- /dev/null
+++ b/pkgbuilds/obsidian/.omarchy/upstream.py
@@ -0,0 +1,45 @@
+#!/usr/bin/python3
+"""Report the newest stable ARM desktop installer, ignoring mobile-only tags."""
+import json
+import re
+import subprocess
+
+
+def select(releases):
+    if not isinstance(releases, list):
+        raise ValueError('Expected a GitHub release list')
+    candidates = []
+    for release in releases:
+        if release.get('draft') or release.get('prerelease'):
+            continue
+        match = re.fullmatch(r'v([0-9]+(?:\.[0-9]+)*)', release.get('tag_name', ''))
+        if not match:
+            continue
+        version = match[1]
+        assets = [a for a in release.get('assets', [])
+                  if a.get('name') == f'obsidian-{version}-arm64.tar.gz']
+        if not assets:
+            continue
+        if len(assets) != 1:
+            raise ValueError('Duplicate desktop installer')
+        candidates.append((tuple(map(int, version.split('.'))), version, release, assets[0]))
+    if not candidates:
+        raise ValueError('No stable ARM desktop installer found')
+    _, version, release, asset = max(candidates, key=lambda row: row[0])
+    digest = asset.get('digest') or ''
+    if not re.fullmatch(r'sha256:[0-9a-f]{64}', digest):
+        raise ValueError('Selected desktop installer lacks its SHA256 digest')
+    expected = f'https://github.com/obsidianmd/obsidian-releases/releases/download/v{version}/obsidian-{version}-arm64.tar.gz'
+    if asset.get('browser_download_url') != expected:
+        raise ValueError('Unexpected desktop installer URL')
+    return {'pkgver': version, 'published_at': release['published_at'],
+            'sha256sums': {'aarch64': [digest[7:]]}}
+
+
+if __name__ == '__main__':
+    response = subprocess.check_output([
+        'curl', '--proto', '=https', '--proto-redir', '=https', '-fsSL',
+        '--retry', '3', '--max-time', '60',
+        'https://api.github.com/repos/obsidianmd/obsidian-releases/releases?per_page=100'
+    ], text=True)
+    print(json.dumps(select(json.loads(response))))
diff --git a/pkgbuilds/obsidian/.omarchy/upstream.sh b/pkgbuilds/obsidian/.omarchy/upstream.sh
new file mode 100644
index 0000000..c422cec
--- /dev/null
+++ b/pkgbuilds/obsidian/.omarchy/upstream.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+set -euo pipefail
+python3 "$(dirname "$0")/upstream.py"
diff --git a/pkgbuilds/obsidian/PKGBUILD b/pkgbuilds/obsidian/PKGBUILD
new file mode 100644
index 0000000..00e8060
--- /dev/null
+++ b/pkgbuilds/obsidian/PKGBUILD
@@ -0,0 +1,94 @@
+# Maintainer: Shun Li <riverscn@gmail.com>
+# Extracted from omacom/omarchy-pkgs PR #240, revision dcef132b2df11bb762e233ea8c6af3110f079b67.
+
+pkgname=obsidian
+pkgver=1.13.7
+pkgrel=2
+pkgdesc='Knowledge base on top of a local folder of plain-text Markdown files'
+arch=('aarch64')
+url='https://obsidian.md/'
+license=('custom')
+depends=(
+  'alsa-lib'
+  'at-spi2-core'
+  'cairo'
+  'dbus'
+  'expat'
+  'fontconfig'
+  'gcc-libs'
+  'glib2'
+  'glibc'
+  'gtk3'
+  'hicolor-icon-theme'
+  'libcups'
+  'libnotify'
+  'libsecret'
+  'libx11'
+  'libxcb'
+  'libxcomposite'
+  'libxdamage'
+  'libxext'
+  'libxfixes'
+  'libxkbcommon'
+  'libxrandr'
+  'mesa'
+  'nspr'
+  'nss'
+  'pango'
+  'systemd-libs'
+  'xdg-utils'
+)
+provides=('obsidian')
+conflicts=('obsidian-appimage' 'obsidian-bin')
+options=('!debug' '!strip')
+source=('obsidian.desktop')
+source_aarch64=(
+  "obsidian-${pkgver}-arm64.tar.gz::https://github.com/obsidianmd/obsidian-releases/releases/download/v${pkgver}/obsidian-${pkgver}-arm64.tar.gz"
+)
+sha256sums=('42ecb332c900a01b2a6db0a70b4cc8c0553e863aee72894b23ed20a6289b131c')
+sha256sums_aarch64=('98aac34d1f132a35cf506fc3fa196d595dcdeefdebd44b0cc5faaa7a1a210de2')
+
+package() {
+  local source_dir="$srcdir/obsidian-${pkgver}-arm64"
+  local install_dir="$pkgdir/opt/obsidian"
+
+  install -d "$install_dir"
+  cp -a --no-preserve=ownership "$source_dir/." "$install_dir/"
+
+  # The official ARM64 archive currently carries two x86_64-only addons.
+  # Remove only an unusable x86_64 payload; retain it automatically if the
+  # vendor starts shipping an AArch64 build in a later release.
+  local addon machine
+  for addon in \
+    resources/app.asar.unpacked/node_modules/btime/binding.node \
+    resources/app.asar.unpacked/node_modules/get-fonts/binding.node; do
+    [[ -f "$install_dir/$addon" ]] || continue
+    machine=$(readelf -h "$install_dir/$addon" |
+      sed -n 's/^[[:space:]]*Machine:[[:space:]]*//p')
+    case "$machine" in
+      AArch64) ;;
+      'Advanced Micro Devices X86-64') rm -f "$install_dir/$addon" ;;
+      *) error "Unexpected Obsidian addon architecture: $addon ($machine)"; return 1 ;;
+    esac
+  done
+
+  find "$install_dir" -type d -exec chmod 755 {} +
+  find "$install_dir" -type f -exec chmod 644 {} +
+  chmod 755 \
+    "$install_dir/chrome_crashpad_handler" \
+    "$install_dir/obsidian" \
+    "$install_dir/obsidian-cli"
+  chmod 4755 "$install_dir/chrome-sandbox"
+
+  install -d "$pkgdir/usr/bin"
+  ln -s /opt/obsidian/obsidian "$pkgdir/usr/bin/obsidian"
+  ln -s /opt/obsidian/obsidian-cli "$pkgdir/usr/bin/obsidian-cli"
+  install -Dm644 "$srcdir/obsidian.desktop" \
+    "$pkgdir/usr/share/applications/obsidian.desktop"
+  install -Dm644 "$install_dir/resources/icon.png" \
+    "$pkgdir/usr/share/icons/hicolor/512x512/apps/obsidian.png"
+  install -Dm644 "$install_dir/LICENSE.electron.txt" \
+    "$pkgdir/usr/share/licenses/$pkgname/LICENSE.electron.txt"
+  install -Dm644 "$install_dir/LICENSES.chromium.html" \
+    "$pkgdir/usr/share/licenses/$pkgname/LICENSES.chromium.html"
+}
diff --git a/pkgbuilds/obsidian/README.md b/pkgbuilds/obsidian/README.md
new file mode 100644
index 0000000..4d12c27
--- /dev/null
+++ b/pkgbuilds/obsidian/README.md
@@ -0,0 +1,11 @@
+# Obsidian on ARM
+
+This is the canonical `obsidian` package, extracted from omacom/omarchy-pkgs #240 at `dcef132b2df11bb762e233ea8c6af3110f079b67`. It repackages the official ARM64 desktop tarball and preserves the original contributor attribution and Electron/Chromium license files.
+
+The package owns the installed application bundle and Electron runtime. Obsidian's user-controlled in-app updater may separately update application code; no updater-disabling patch is applied. See https://obsidian.md/help/updates.
+
+The package-local upstream hook selects stable desktop releases containing the exact ARM64 tarball, ignoring mobile-only tags. Missing SHA256 metadata on the selected desktop release fails rather than silently selecting an older installer. Run `python tests/obsidian-upstream.py` for offline tests. Upstream's scheduled sync opens or updates its normal review PR; maintainers need GitHub PR notifications enabled and should monitor failed sync runs too.
+
+This package conflicts with `obsidian-appimage` and `obsidian-bin`. It does not automatically remove them or migrate users. Adoption in Omarchy Mac requires a separate change to the existing ARM preinstall/removal mappings. Do not modify vaults or user configuration as part of the package transaction.
+
+Before this draft is ready, validate clean ARM installation, desktop/CLI paths, native payload architecture and opening/editing a disposable vault in a disposable GUI session. Existing AppImage operation does not validate this tarball package. The two named vendor x86-only addons are removed; any newly introduced foreign executable requires review.
diff --git a/pkgbuilds/obsidian/obsidian.desktop b/pkgbuilds/obsidian/obsidian.desktop
new file mode 100644
index 0000000..da3429e
--- /dev/null
+++ b/pkgbuilds/obsidian/obsidian.desktop
@@ -0,0 +1,10 @@
+[Desktop Entry]
+Name=Obsidian
+Comment=Knowledge base on top of a local folder of Markdown files
+Exec=obsidian %U
+Terminal=false
+Type=Application
+Icon=obsidian
+StartupWMClass=obsidian
+MimeType=x-scheme-handler/obsidian;
+Categories=Office;
diff --git a/tests/obsidian-upstream.py b/tests/obsidian-upstream.py
new file mode 100644
index 0000000..2638b34
--- /dev/null
+++ b/tests/obsidian-upstream.py
@@ -0,0 +1,47 @@
+#!/usr/bin/python3
+import importlib.util
+from pathlib import Path
+import unittest
+
+path = Path(__file__).resolve().parents[1] / 'pkgbuilds/obsidian/.omarchy/upstream.py'
+spec = importlib.util.spec_from_file_location('obsidian_upstream', path)
+module = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(module)
+
+
+def release(version, **extra):
+    return dict(tag_name='v' + version, draft=False, prerelease=False,
+                published_at='2026-09-23T00:00:00Z', assets=[{
+                    'name': f'obsidian-{version}-arm64.tar.gz',
+                    'digest': 'sha256:' + 'a' * 64,
+                    'browser_download_url': f'https://github.com/obsidianmd/obsidian-releases/releases/download/v{version}/obsidian-{version}-arm64.tar.gz'
+                }], **extra)
+
+
+class DesktopReleaseTests(unittest.TestCase):
+    def test_mobile_only_and_preview_ignored(self):
+        mobile = release('2.0.0'); mobile['assets'] = [{'name': 'Obsidian.apk'}]
+        preview = release('3.0.0'); preview['prerelease'] = True
+        draft = release('4.0.0'); draft['draft'] = True
+        self.assertEqual(module.select([mobile, preview, draft, release('1.13.7')])['pkgver'], '1.13.7')
+
+    def test_numeric_version_order(self):
+        self.assertEqual(module.select([release('1.9.0'), release('1.13.7')])['pkgver'], '1.13.7')
+
+    def test_bad_newest_digest_fails_without_falling_back(self):
+        newest = release('2.0.0'); newest['assets'][0]['digest'] = None
+        with self.assertRaises(ValueError):
+            module.select([release('1.13.7'), newest])
+
+    def test_changed_url_rejected(self):
+        row = release('1.13.7'); row['assets'][0]['browser_download_url'] = 'https://example.org/foreign'
+        with self.assertRaises(ValueError): module.select([row])
+
+    def test_missing_or_duplicate_installer_rejected(self):
+        with self.assertRaises(ValueError): module.select([])
+        row = release('1.13.7'); row['assets'] *= 2
+        with self.assertRaises(ValueError): module.select([row])
+
+
+if __name__ == '__main__':
+    unittest.main()