Function stopSession

cli/src/runner/run.ts:659–692

(sessionId: string)

    // Stop a session by sessionId or PID fallback
    const stopSession = (sessionId: string): boolean => {
      logger.debug(`[RUNNER RUN] Attempting to stop session ${sessionId}`);

      // Try to find by sessionId first
      for (const [pid, session] of pidToTrackedSession.entries()) {
        if (session.happySessionId === sessionId ||
          (sessionId.startsWith('PID-') && pid === parseInt(sessionId.replace('PID-', '')))) {

          if (session.startedBy === 'runner' && session.childProcess) {
            try {
              void killProcessByChildProcess(session.childProcess);
              logger.debug(`[RUNNER RUN] Requested termination for runner-spawned session ${sessionId}`);
            } catch (error) {
              logger.debug(`[RUNNER RUN] Failed to kill session ${sessionId}:`, error);
            }
          } else {
            // For externally started sessions, try to kill by PID
            try {
              void killProcess(pid);
              logger.debug(`[RUNNER RUN] Requested termination for external session PID ${pid}`);
            } catch (error) {
              logger.debug(`[RUNNER RUN] Failed to kill external session PID ${pid}:`, error);
            }
          }

          pidToTrackedSession.delete(pid);
          logger.debug(`[RUNNER RUN] Removed session ${sessionId} from tracking`);
          return true;
        }
      }

      logger.debug(`[RUNNER RUN] Session ${sessionId} not found`);
      return false;
    };

    // Handle child process exit
    const onChildExited = (pid: number) => {