`sectionId` for a field that's not in a section is "add more"

[battis]

Scenario & Reproduction Steps

It took me a bit of debugging to figure this out: I was trying to figure out how to safely identify a field from a secret reference so that I could write an updated value to it. The edge case I was looking at was a field that a) shared the same title as another field, but also b) was not in a section.

Imagine my surprise to find out that, when iterating across the item's fields, the sectionId, as reported by 1password-sdk, was not undefined or an empty string but "add more".

Actual Behavior

Here's a concrete example. This is the item as seen in 1Password:

I'm working with the last password field -- the one not in any section. It's secret reference is op://dev/yxmfyrltenwk7avd6wkcl6yase/password and when I try to identify that field, I'm looking at an item that is described by the SDK thus:

{
  "id": "yxmfyrltenwk7avd6wkcl6yase",
  "title": "examples/dev-1password-env",
  "category": "Login",
  "vaultId": "<hidden>",
  "fields": [
    {
      "id": "3smnt7pb7leszffrziscbv4fbe",
      "title": "write-test",
      "sectionId": "vxckujnmer6ohovfbdso4mkfzi",
      "fieldType": "Text",
      "value": "1766582962798",
      "details": null
    },
    {
      "id": "ca4yvqqsx7znj2dt626raxy34q",
      "title": "password-test",
      "sectionId": "vxckujnmer6ohovfbdso4mkfzi",
      "fieldType": "Concealed",
      "value": "dWxQnaiFJn4BmLbr3c_H",
      "details": null
    },
    {
      "id": "cz5xx4wliffxgv5b4ttovcjsmm",
      "title": "password",
      "sectionId": "33p7y6fv75r33whchnyruct3ua",
      "fieldType": "Concealed",
      "value": "tv8HwcziaJo9HDECxVpC",
      "details": null
    },
    {
      "id": "pbxexp54bxvyq4cxzilscjedzy",
      "title": "password",
      "sectionId": "33p7y6fv75r33whchnyruct3ua",
      "fieldType": "Concealed",
      "value": "WiCKqLkrZYqgLbK6H9tU",
      "details": null
    },
    {
      "id": "nqekfdcyya6uuw2m2bjkon5w6m",
      "title": "password",
      "sectionId": "add more",
      "fieldType": "Concealed",
      "value": "2025-12-24T02:41:51.044Z",
      "details": null
    }
  ],
  "sections": [
    {
      "id": "vxckujnmer6ohovfbdso4mkfzi",
      "title": "env"
    },
    {
      "id": "33p7y6fv75r33whchnyruct3ua",
      "title": "alt section"
    },
    {
      "id": "add more",
      "title": ""
    }
  ],
  "notes": "",
  "tags": [],
  "websites": [],
  "version": 38,
  "files": [],
  "document": null,
  "createdAt": "2025-07-14T20:06:30.000Z",
  "updatedAt": "2025-12-24T13:29:23.000Z"
}

Behold the mysterious final section with an empty string for a title and the id add more. So weird.

Expected Behavior

In my head, I was imaging that the field would have an undefined sectionId, inasmuch as it was not in a section or that there would be some sort of "default" section that section-less fields would go into that would have a real ID (which I guess is what add more is?).

SDK version

0.3.1

Additional information

No response

[battis]

Just to add a twist: it turns out that when the field is outside a section at the start of the item (e.g. a credential field in an API Credential), the sectionId is an empty string.