curl -X PUT https://agentgate.mynewapi.com/v1/templates/our-api-template \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Our API Template v2",
    "description": "Updated template with new conventions",
    "source": {
      "type": "git",
      "repository": "https://github.com/our-org/api-template",
      "branch": "v2"
    }
  }'

{
  "id": "our-api-template",
  "name": "Our API Template v2",
  "description": "Updated template with new conventions",
  "source": {
    "type": "git",
    "repository": "https://github.com/our-org/api-template",
    "branch": "v2"
  },
  "variables": [...],
  "builtIn": false,
  "createdAt": "2024-01-15T10:30:00Z",
  "updatedAt": "2024-01-15T11:00:00Z"
}