How do I install the Sanity Schema Manager skill?

Run npx skillmds add majiayu000/sanity-schema-manager in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Sanity Schema Manager skill do?

Manages schema lifecycle including scaffolding, safe field deprecation, and data migrations. Use when modifying existing schemas. It is listed under Coding & Dev Tools on SkillMD.

Is Sanity Schema Manager safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Sanity Schema Manager?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Sanity Schema Manager free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Sanity Schema Manager?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Sanity Schema Manager by majiayu000

Name: Sanity Schema Manager
Rating: 4.2 (5 reviews)
Author: majiayu000

File contents

Schema Manager

This skill handles the lifecycle of Sanity Schema types.

Procedure

Scaffold (Create)
- Use templates to create document, object, or singleton types.
- Constraint: Ensure defineType and defineField are used.
- Constraint: Ensure an icon is imported from @sanity/icons.

Deprecate (Update)

Ask: "Which field do you want to deprecate?"
Action: Apply the "ReadOnly -> Hidden -> Deprecated" pattern to the field definition.

Output:

defineField({
  name: 'oldField',
  deprecated: { reason: 'Use newField instead' },
  readOnly: true,
  hidden: ({value}) => value === undefined,
  initialValue: undefined
})

Migrate (Data)
- Generate a migration script using @sanity/migrate or standard client patches.
- Template: Iterate over documents -> patch(doc.id).set({ newField: doc.oldField }).unset(['oldField']).
Clean (Delete)
- Only allow deleting a field definition if the user confirms "I have migrated the data and the field is undefined in all documents."

Frequently asked questions