diff --git a/home-manager/services/obsidian/default.nix b/home-manager/services/obsidian/default.nix
index 077302ce0..d43f246e4 100644
--- a/home-manager/services/obsidian/default.nix
+++ b/home-manager/services/obsidian/default.nix
@@ -24,6 +24,18 @@ let
       }
     )
   );
+
+  # Trigger obsidian-git's auto-backup via CDP. The Electron renderer's
+  # setTimeout doesn't fire under headless xvfb (futex blocks the event
+  # loop), but CDP uses IPC and bypasses it. All git operations still
+  # run through the obsidian-git plugin.
+  obsidianGitTrigger = pkgs.writeShellScriptBin "obsidian-git-trigger" (
+    builtins.readFile (
+      pkgs.replaceVars ./obsidian-git-trigger.sh {
+        inherit (pkgs) curl jq websocat;
+      }
+    )
+  );
 in
 # Only enable on kyber (gateway host) - desktops already get pkgs.obsidian
 # directly via home-manager/packages/default.nix.
@@ -49,4 +61,29 @@ lib.mkIf host.isKyber {
       WantedBy = [ "default.target" ];
     };
   };
+
+  systemd.user.services.obsidian-git-trigger = {
+    Unit = {
+      Description = "Trigger obsidian-git auto-backup via CDP";
+      After = [ "obsidian.service" ];
+    };
+    Service = {
+      Type = "oneshot";
+      ExecStart = "${obsidianGitTrigger}/bin/obsidian-git-trigger";
+    };
+  };
+
+  systemd.user.timers.obsidian-git-trigger = {
+    Unit = {
+      Description = "Trigger obsidian-git auto-backup every 3 minutes";
+    };
+    Timer = {
+      OnBootSec = "2min";
+      OnUnitActiveSec = "3min";
+      Unit = "obsidian-git-trigger.service";
+    };
+    Install = {
+      WantedBy = [ "timers.target" ];
+    };
+  };
 }
diff --git a/home-manager/services/obsidian/obsidian-git-trigger.sh b/home-manager/services/obsidian/obsidian-git-trigger.sh
new file mode 100644
index 000000000..eb92096f8
--- /dev/null
+++ b/home-manager/services/obsidian/obsidian-git-trigger.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Trigger obsidian-git's commitAndSync via CDP.
+#
+# The Electron renderer's setTimeout doesn't fire under headless xvfb
+# (futex_wait_queue blocks the event loop pump), but CDP messages use
+# IPC and bypass the stuck loop. We trigger the backup and keep the
+# websocket open with ping-interval for 15s to pump the event loop
+# while git operations complete through the obsidian-git plugin.
+
+CDP="http://localhost:9222"
+
+WS_URL=$(@curl@/bin/curl -sf "$CDP/json" | @jq@/bin/jq -r '.[0].webSocketDebuggerUrl // empty')
+[ -z "$WS_URL" ] && exit 0
+
+# Send trigger, then keep stdin open for 15s so websocat stays alive.
+# The --ping-interval sends websocket pings that pump the Electron
+# event loop, allowing the obsidian-git promise queue to execute.
+{
+  echo '{"id":1,"method":"Runtime.evaluate","params":{"expression":"app.plugins.plugins['"'"'obsidian-git'"'"']?.automaticsManager?.doAutoCommitAndSync()"}}'
+  sleep 15
+} | @websocat@/bin/websocat --ping-interval 1 "$WS_URL" >/dev/null 2>&1 || true
diff --git a/home-manager/services/obsidian/obsidian-headless.sh b/home-manager/services/obsidian/obsidian-headless.sh
index d61a81749..1d28c0724 100644
--- a/home-manager/services/obsidian/obsidian-headless.sh
+++ b/home-manager/services/obsidian/obsidian-headless.sh
@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-exec @xvfbRun@/bin/xvfb-run -a -s "-screen 0 1280x1024x24" @obsidian@/bin/obsidian --no-sandbox --disable-gpu --disable-features=FontationsFontIndexer --vault @homeDir@/ghq/github.com/shunkakinoki/wiki "$@"
+exec @xvfbRun@/bin/xvfb-run -a -s "-screen 0 1280x1024x24" @obsidian@/bin/obsidian --no-sandbox --disable-gpu --disable-features=FontationsFontIndexer --remote-debugging-port=9222 --vault @homeDir@/ghq/github.com/shunkakinoki/wiki "$@"
diff --git a/spec/coverage_spec.sh b/spec/coverage_spec.sh
index 70355d45c..09f695838 100644
--- a/spec/coverage_spec.sh
+++ b/spec/coverage_spec.sh
@@ -368,6 +368,7 @@ home-manager/modules/local-scripts/notify-local.sh
 home-manager/modules/local-scripts/pushover-notify.sh
 home-manager/modules/local-scripts/tmux-bridge.sh
 home-manager/modules/npm-globals/install-npm-globals.sh
+home-manager/services/obsidian/obsidian-git-trigger.sh
 home-manager/services/obsidian/obsidian-headless.sh
 home-manager/services/openclaw/activate.sh
 home-manager/services/paperclip/activate.sh
diff --git a/spec/obsidian_git_trigger_spec.sh b/spec/obsidian_git_trigger_spec.sh
new file mode 100644
index 000000000..28195c01f
--- /dev/null
+++ b/spec/obsidian_git_trigger_spec.sh
@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# shellcheck disable=SC2329
+
+Describe 'home-manager/services/obsidian/obsidian-git-trigger.sh'
+SCRIPT="$PWD/home-manager/services/obsidian/obsidian-git-trigger.sh"
+
+Describe 'script properties'
+It 'uses bash shebang'
+When run bash -c "head -1 '$SCRIPT'"
+The output should include '#!/usr/bin/env bash'
+End
+
+It 'passes bash syntax check after replacing placeholders'
+When run bash -c "sed -e 's|@curl@|/usr|g' -e 's|@jq@|/usr|g' -e 's|@websocat@|/usr|g' '$SCRIPT' | bash -n"
+The status should be success
+End
+End
+
+Describe 'placeholder references'
+It 'references curl via placeholder'
+When run bash -c "grep '@curl@' '$SCRIPT'"
+The output should include '@curl@'
+End
+
+It 'references jq via placeholder'
+When run bash -c "grep '@jq@' '$SCRIPT'"
+The output should include '@jq@'
+End
+
+It 'references websocat via placeholder'
+When run bash -c "grep '@websocat@' '$SCRIPT'"
+The output should include '@websocat@'
+End
+End
+
+Describe 'CDP integration'
+It 'connects to CDP on port 9222'
+When run bash -c "grep '9222' '$SCRIPT'"
+The output should include '9222'
+End
+
+It 'triggers doAutoCommitAndSync'
+When run bash -c "grep 'doAutoCommitAndSync' '$SCRIPT'"
+The output should include 'doAutoCommitAndSync'
+End
+End
+
+End