Module not found error: Can't resolve 'part:@sanity/desk-tool/structure

I can see you're running into a classic version mismatch issue! The error you're getting is because you're following a guide written for Sanity Studio v2, but you're likely using Sanity Studio v3 (or v4). The part: import system was completely removed in Studio v3, which is why you're getting that "Can't resolve" error.

The Solution

In Studio v3+, the import path has changed. Instead of:

// ❌ This is v2 syntax - won't work in v3+
import S from 'part:@sanity/desk-tool/structure-builder'

You need to use:

// ✅ This is v3+ syntax
import {structureTool} from 'sanity/structure'

How to Set Up Structure Builder in v3+

Here's the modern way to configure the Structure Builder:

1. Create a structure file (e.g., structure/index.ts or structure.ts):

import type {StructureResolver} from 'sanity/structure'

export const structure: StructureResolver = (S) =>
  S.list()
    .id('root')
    .title('Content')
    .items([
      S.documentTypeListItem('post').title('Blog Posts'),
      S.documentTypeListItem('author').title('Authors'),
      // Add more document types as needed
    ])

2. Import and configure it in your sanity.config.ts:

import {defineConfig} from 'sanity'
import {structureTool} from 'sanity/structure'
import {structure} from './structure'

export default defineConfig({
  // ...your other config
  plugins: [
    structureTool({structure}),
    // ...other plugins
  ],
})

What Changed Between v2 and v3?

• v2: Used the part: system and required a deskStructure.js file
• v3+: Uses standard ES module imports and configures everything in sanity.config.ts
• The Structure Builder object (S) works mostly the same, but how you import and configure it is completely different

Updated Documentation

The guide you were following is outdated. For current documentation, check out:

• The Structure Builder documentation for v3+
• Studio v3 migration guide if you need to migrate existing v2 code

The good news is that once you update your imports and configuration structure, most of your actual Structure Builder code (the S.list(), S.documentTypeListItem(), etc.) will work with minimal changes!