Trouble installing Sanity SEO plugin, resolved with corrected command

The sanity install command is deprecated and no longer works in Sanity Studio v3! That's why you're getting an error.

The old sanity install seo-pane command was only for Studio v2. In Studio v3, you need to install plugins using npm or your package manager directly.

For the SEO Pane plugin, here's what you should do:

Install it with npm:

npm install sanity-plugin-seo-pane

Then add it to your sanity.config.ts file:

import {defineConfig} from 'sanity'
import {seoPane} from 'sanity-plugin-seo-pane'

export default defineConfig({
  // ... other config
  plugins: [
    seoPane({
      // your configuration options
    })
  ]
})

This is the standard way to install all plugins in Studio v3 - the CLI-based sanity install command was completely removed when Studio v3 launched. You'll always use npm/yarn/pnpm to install packages, then manually add them to your config file's plugins array.

Check out the plugin's documentation for specific configuration options you'll need to set up, like defining which fields to analyze and configuring the preview URL.