From f4ac4c058b9c52271ef72efc8b93d7aad2014a8a Mon Sep 17 00:00:00 2001
From: Alex Rudenko <alexrudenko@chromium.org>
Date: Thu, 5 Mar 2026 09:24:57 +0100
Subject: [PATCH] chore: add detailed daemon status

---
 src/bin/chrome-devtools.ts        | 17 +++++++++++++++
 src/daemon/daemon.ts              | 15 ++++++++++++-
 src/daemon/types.ts               |  3 +++
 tests/e2e/chrome-devtools.test.ts | 35 +++++++++++++------------------
 4 files changed, 48 insertions(+), 22 deletions(-)

diff --git a/src/bin/chrome-devtools.ts b/src/bin/chrome-devtools.ts
index f951928ae..6ac4e057d 100644
--- a/src/bin/chrome-devtools.ts
+++ b/src/bin/chrome-devtools.ts
@@ -72,6 +72,23 @@ y.command(
 y.command('status', 'Checks if chrome-devtools-mcp is running', async () => {
   if (isDaemonRunning()) {
     console.log('chrome-devtools-mcp daemon is running.');
+    const response = await sendCommand({
+      method: 'status',
+    });
+    if (response.success) {
+      const data = JSON.parse(response.result) as {
+        pid: number | null;
+        socketPath: string;
+        startDate: string;
+        version: string;
+      };
+      console.log(
+        `pid=${data.pid} socket=${data.socketPath} start-date=${data.startDate} version=${data.version}`,
+      );
+    } else {
+      console.error('Error:', response.error);
+      process.exit(1);
+    }
   } else {
     console.log('chrome-devtools-mcp daemon is not running.');
   }
diff --git a/src/daemon/daemon.ts b/src/daemon/daemon.ts
index b0cd3aea4..94baa740c 100644
--- a/src/daemon/daemon.ts
+++ b/src/daemon/daemon.ts
@@ -42,6 +42,8 @@ logger(`Writing ${process.pid.toString()} to ${pidFilePath}`);
 
 const socketPath = getSocketPath();
 
+const startDate = new Date();
+
 let mcpClient: Client | null = null;
 let mcpTransport: StdioClientTransport | null = null;
 let server: Server | null = null;
@@ -107,7 +109,18 @@ async function handleRequest(msg: DaemonMessage) {
         success: true,
         message: 'stopping',
       };
-    } else {
+    } else if (msg.method === 'status') {
+      return {
+        success: true,
+        result: JSON.stringify({
+          pid: process.pid,
+          socketPath,
+          startDate: startDate.toISOString(),
+          version: VERSION,
+        }),
+      };
+    }
+    {
       return {
         success: false,
         error: `Unknown method: ${JSON.stringify(msg, null, 2)}`,
diff --git a/src/daemon/types.ts b/src/daemon/types.ts
index 885bf1b6a..b84b58b2b 100644
--- a/src/daemon/types.ts
+++ b/src/daemon/types.ts
@@ -8,6 +8,9 @@ export type DaemonMessage =
   | {
       method: 'stop';
     }
+  | {
+      method: 'status';
+    }
   | {
       method: 'invoke_tool';
       tool: string;
diff --git a/tests/e2e/chrome-devtools.test.ts b/tests/e2e/chrome-devtools.test.ts
index 70f7874fd..8e27f9d2a 100644
--- a/tests/e2e/chrome-devtools.test.ts
+++ b/tests/e2e/chrome-devtools.test.ts
@@ -22,6 +22,16 @@ describe('chrome-devtools', () => {
     );
   }
 
+  function assertDaemonIsRunning() {
+    const result = spawnSync('node', [CLI_PATH, 'status']);
+    assert.ok(
+      result.stdout
+        .toString()
+        .startsWith('chrome-devtools-mcp daemon is running.\n'),
+      'chrome-devtools-mcp daemon is not running',
+    );
+  }
+
   beforeEach(() => {
     spawnSync('node', [CLI_PATH, 'stop']);
     assertDaemonIsNotRunning();
@@ -42,11 +52,7 @@ describe('chrome-devtools', () => {
       `start command failed: ${startResult.stderr.toString()}`,
     );
 
-    const result = spawnSync('node', [CLI_PATH, 'status']);
-    assert.strictEqual(
-      result.stdout.toString(),
-      'chrome-devtools-mcp daemon is running.\n',
-    );
+    assertDaemonIsRunning();
   });
 
   it('can start and stop the daemon', () => {
@@ -59,11 +65,7 @@ describe('chrome-devtools', () => {
       `start command failed: ${startResult.stderr.toString()}`,
     );
 
-    let result = spawnSync('node', [CLI_PATH, 'status']);
-    assert.strictEqual(
-      result.stdout.toString(),
-      'chrome-devtools-mcp daemon is running.\n',
-    );
+    assertDaemonIsRunning();
 
     const stopResult = spawnSync('node', [CLI_PATH, 'stop']);
     assert.strictEqual(
@@ -72,11 +74,7 @@ describe('chrome-devtools', () => {
       `stop command failed: ${stopResult.stderr.toString()}`,
     );
 
-    result = spawnSync('node', [CLI_PATH, 'status']);
-    assert.strictEqual(
-      result.stdout.toString(),
-      'chrome-devtools-mcp daemon is not running.\n',
-    );
+    assertDaemonIsNotRunning();
   });
 
   it('can invoke list_pages', async () => {
@@ -100,12 +98,7 @@ describe('chrome-devtools', () => {
       'list_pages output is unexpected',
     );
 
-    // Daemon should now be running.
-    const result = spawnSync('node', [CLI_PATH, 'status']);
-    assert.strictEqual(
-      result.stdout.toString(),
-      'chrome-devtools-mcp daemon is running.\n',
-    );
+    assertDaemonIsRunning();
   });
 
   it('forwards disclaimers to stderr on start', () => {