Error page when adding ai assistants when ai_agent module is not installed or uninstalled.

Similar to the https://www.drupal.org/project/ai_agents/issues/3516448 🐛 Fatal Error on enabling Active but steps to reproduce are different i.e occurring on Assistants.

Will set this as a release blocker.

Ai assistant is created without ai_agent

Reviewed the MR and tested the changes. The MR fixes the issue when adding ai assistant without ai_agent installed. @anjaliprasannan

In AiAssistantForm.php around line 239:

      $form['agents_enabled']['agents_agent'] = [
        '#type' => 'checkboxes',
        '#title' => $this->t('Agents to use'),
        '#options' => $agent_options,
        '#default_value' => $tools,
        '#description' => $this->t('Select which agents to use for this plugin.'),
      ];

      // Only show if AI search is enabled.
      if ($this->moduleHandler->moduleExists('ai_search')) {

there should be similar check if ai_agents module is enabled (same check as for ai_search module in the code fragment above).
Otherwise, there is an empty "Agents to use" form element.
I'm reviewing the MR and will add comments in gitlab if I see something else.

Reviewed the MR and tested the changes. The MR fixes the issue when adding ai assistant without ai_agent installed

Thank you all, getting merged!

Automatically closed - issue fixed for 2 weeks with no activity.

Crediting Marcus