enables process-control to try stopping codex with sigterm when sigint fails to stop it.

src/__mocks__/service.mocks.js

@@ -47,6 +47,7 @@ export const mockOsService = {
   getWorkingDir: vi.fn(),
   listProcesses: vi.fn(),
   stopProcess: vi.fn(),
+  terminateProcess: vi.fn(),
 };
 
 export const mockCodexGlobals = {

src/handlers/processControl.js

@@ -25,9 +25,25 @@ export class ProcessControl {
     if (processes.length < 1) throw new Error("No codex process found");
 
     const pid = processes[0].pid;
+    await this.stopProcess(pid);
+  };
+
+  stopProcess = async (pid) => {
     this.os.stopProcess(pid);
     await this.sleep();
-  };
+
+    if (await this.isProcessRunning(pid)) {
+      this.os.terminateProcess(pid);
+      await this.sleep();
+    }
+  }
+
+  isProcessRunning = async (pid) => {
+    const processes = await this.os.listProcesses();
+    const p = processes.filter((p) => p.pid == pid);
+    const result = p.length > 0;
+    return result;
+  }
 
   startCodexProcess = async () => {
     await this.saveCodexConfigFile();

src/services/osService.js

@@ -29,4 +29,8 @@ export class OsService {
   stopProcess = (pid) => {
     process.kill(pid, "SIGINT");
   };
+
+  terminateProcess = (pid) => {
+    process.kill(pid, "SIGTERM");
+  }
 }