diff --git a/packages/sdk/src/client.ts b/packages/sdk/src/client.ts
index 641476e87..3ebb5532c 100644
--- a/packages/sdk/src/client.ts
+++ b/packages/sdk/src/client.ts
@@ -222,6 +222,10 @@ export class AgentRelayClient {
     };
   }
 
+  get brokerPid(): number | undefined {
+    return this.child?.pid;
+  }
+
   async start(): Promise<void> {
     if (this.child) {
       return;
diff --git a/src/cli/commands/core.ts b/src/cli/commands/core.ts
index 5e33e504c..fd8dea0b8 100644
--- a/src/cli/commands/core.ts
+++ b/src/cli/commands/core.ts
@@ -76,6 +76,8 @@ export interface CoreRelay {
   onBrokerStderr?: (listener: (line: string) => void) => () => void;
   /** Relaycast workspace API key, available after the hello handshake. */
   workspaceKey?: string;
+  /** PID of the underlying broker process, when available. */
+  brokerPid?: number;
 }
 
 export interface CoreFileSystem {
@@ -259,6 +261,7 @@ function createDefaultRelay(cwd: string, apiPort = 0): CoreRelay {
     shutdown: () => client.shutdown(),
     onBrokerStderr: (listener: (line: string) => void) => client.onBrokerStderr(listener),
     get workspaceKey() { return client.workspaceKey; },
+    get brokerPid() { return client.brokerPid; },
   };
   return relay;
 }
diff --git a/src/cli/lib/broker-lifecycle.ts b/src/cli/lib/broker-lifecycle.ts
index ed31c211d..ab9fac6b9 100644
--- a/src/cli/lib/broker-lifecycle.ts
+++ b/src/cli/lib/broker-lifecycle.ts
@@ -173,9 +173,26 @@ function isProcessRunning(pid: number, deps: CoreDependencies): boolean {
 async function killOrphanedBrokerProcesses(projectRoot: string, deps: CoreDependencies): Promise<void> {
   try {
     const shellQuote = (s: string): string => "'" + s.replace(/'/g, "'\\''") + "'";
-    const { stdout } = await deps.execCommand(
-      `ps aux | grep '[a]gent-relay-broker' | grep -F ${shellQuote(projectRoot)}`
-    );
+    const brokerName = path.basename(projectRoot) || 'project';
+    let stdout = '';
+    try {
+      const byName = await deps.execCommand(
+        `ps aux | grep '[a]gent-relay-broker' | grep -F ${shellQuote('--name ' + brokerName)}`
+      );
+      stdout = byName.stdout;
+    } catch {
+      // Name filter may not match older process invocations; try legacy path-based filter.
+    }
+    if (!stdout.trim()) {
+      try {
+        const byPath = await deps.execCommand(
+          `ps aux | grep '[a]gent-relay-broker' | grep -F ${shellQuote(projectRoot)}`
+        );
+        stdout = byPath.stdout;
+      } catch {
+        // Expected when no orphaned processes are matched by either strategy.
+      }
+    }
     const lines = stdout.trim().split('\n').filter(Boolean);
     for (const line of lines) {
       const parts = line.trim().split(/\s+/);
@@ -882,7 +899,7 @@ export async function runUpCommand(options: UpOptions, deps: CoreDependencies):
     );
     relay = started.relay;
     apiPort = started.apiPort;
-    writeBrokerPid(brokerPidPath, deps.pid, deps);
+    writeBrokerPid(brokerPidPath, relay.brokerPid ?? deps.pid, deps);
     const dashboardRelayUrl = resolveDashboardRelayUrl(apiPort, deps);
     const expectedRelayUrl = getDefaultDashboardRelayUrl(apiPort);
     if (