curl --request POST \
  --url http://localhost:8080/v1/repo/{repo_name}/targets/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "targets": [
    {
      "overrides": {
        "temperature": 0.8,
        "u": "my_unconditioned_prompt"
      },
      "target_name": "target_alpha",
      "template": "default"
    },
    {
      "overrides": {
        "v": "my_conditioned_prompt"
      },
      "target_name": "target_beta",
      "template": "target_alpha"
    }
  ]
}
'

{
  "created": [
    "target_alpha",
    "target_beta"
  ],
  "failed": {
    "target_delta": "Template 'nonexistent' not found",
    "target_gamma": "Missing required stim fields: ['teacher_prompt', 'student_prompt']"
  }
}