feat(@sanity/assist): add hideInstructions option at plugin and field level

[Copilot]

Currently, enabling translate requires exposing the full AI Assist instructions UI ("Manage instructions", instruction items). Users who only want translation have no way to hide instruction management.

Changes

• AssistPluginConfig.hideInstructions — New plugin-level boolean to globally hide instruction UI
• options.aiAssist.hideInstructions — New field-level option following the same pattern as exclude and translateAction. Field-level overrides plugin-level.
• assistFieldActions.tsx — Resolution cascade: fieldOptions?.aiAssist?.hideInstructions ?? config?.hideInstructions ?? false. Hides "Manage instructions" action, instruction items in menus, and the sparkle button on fields with no other actions. Translation, image, and custom actions are unaffected.
• README — Documents both plugin-level and field-level usage with override examples

Usage

Global — translate only, no instructions anywhere:

assist({
  hideInstructions: true,
  translate: { document: { languageField: 'language' } },
})

Per-field — hide on specific fields, or re-enable when hidden globally:

defineField({
  name: 'subtitle',
  type: 'internationalizedArrayString',
  options: {
    aiAssist: { hideInstructions: true, translateAction: true },
  },
})

// Override: show instructions on this field even when hidden globally
defineField({
  name: 'body',
  type: 'array',
  of: [{ type: 'block' }],
  options: {
    aiAssist: { hideInstructions: false },
  },
})

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Ability to only show the translate option </issue_title>
<issue_description>Is your feature request related to a problem? Please describe.
Currently, to include the translate option you are required to expose all ai assist prompt fields.

Describe the solution you'd like
I would like to simply be able to show translate only (i.e. not 'Manage Instructions' option)
</issue_description>

<agent_instructions>Do this update in the ai-assist plugin inside this repo. Update the readme on how to do this </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Ability to only show the translate option  #670

---

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Project	Deployment	Actions	Updated (UTC)
plugins-studio	Ready	Preview, Comment	Mar 6, 2026 10:30am

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🦋 Changeset detected

Latest commit: 9e7fc8d

The changes in this PR will be included in the next version bump.

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Name	Type
@sanity/assist	Minor

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