Error: Unable to render, client only hint needed

[IgnaceMaes]

Recreating the example from the readme gives:

12:02:13 [ERROR] [NoClientOnlyHint] Unable to render `HelloWorld`. When using the `client:only` hydration strategy, Astro needs a hint to use the correct renderer.
  Hint:
    Did you mean to pass `client:only="react|preact|solid-js|vue|svelte"`? See https://docs.astro.build/en/reference/directives-reference/#clientonly for more information on client:only
  Error reference:
    https://docs.astro.build/en/reference/errors/no-client-only-hint/
  Stack trace:
    at /.../astro-app/node_modules/.pnpm/astro@5.16.6_@types+node@25.0.3_jiti@2.6.1_lightningcss@1.30.2_rollup@4.54.0_terser@5.44.1_typescript@5.9.3/node_modules/astro/dist/runtime/server/render/component.js:162:15
    [...] See full stack trace in the browser, or rerun with --verbose.

Via:

pnpm dlx create-astro@latest astro-app  --template with-tailwindcss --install --git
pnpm add ember-astro

I tried both client:only="ember" and client:only="ember-astro". (one is documented in the README, the other is used in examples in the repo)

[NullVoxPopuli]

How do we update the hint? 🤔

in the docs app, we use client:only="ember" 🤔