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## Problem
A user setting up Hexclave in a new Next.js project with a coding agent
hit:
> **HexclaveTheme error:** Cannot render a `<style>` outside the main
document without knowing its precedence and a unique href key...
The agent eventually fixed it by moving
`HexclaveProvider`/`HexclaveTheme` from *wrapping* the `<html>` tag to
*inside* it.
## Root cause
The Next.js `layout.tsx` example in the setup prompt
([`ai-setup-prompt.ts`](packages/shared/src/ai/unified-prompts/skill-site-prompt-parts/ai-setup-prompt.ts))
returned **just** the providers, with no `<html>`/`<body>`:
```tsx
export default function RootLayout({ children }) {
return (
<HexclaveProvider app={hexclaveServerApp}>
<HexclaveTheme>{children}</HexclaveTheme>
</HexclaveProvider>
);
}
```
But a Next.js root layout is [**required** to render `<html>` and
`<body>`](https://nextjs.org/docs/app/api-reference/file-conventions/layout).
When an agent reconciles this incomplete snippet with an existing
layout, the snippet shows the providers as the outermost element — so it
wraps the existing `<html>` with them. That puts `HexclaveTheme`'s
hoisted `<style>` outside the document, which React refuses to render →
the error above.
Every other framework example in the prompt is complete (the TanStack
Start one explicitly separates the `<html>`/`<body>` shell from the
providers); only the Next.js one was ambiguous.
## Fix
- Show the full document shell with the providers nested **inside
`<body>`**.
- Add an explicit note: the root layout must render `<html>`/`<body>`,
and the providers must go inside `<body>` — do not wrap `<html>`.
- Drop the unused `Suspense` import (Suspense is covered in the separate
boundary step; per the Next.js docs you should not add `<head>`
manually, so the example stays minimal).
- Regenerated `setup.mdx`, `llms-full.txt`, and the agent-reminder
snippets from the prompt source.
This source feeds the CLI `init` prompt, `skill.hexclave.com`
(`llms-full.txt`), and the generated docs, so the fix propagates
everywhere.
## Verification
- `turbo run typecheck` — `@hexclave/shared` and all other packages
pass. (3 pre-existing failures in
`dashboard`/`example-demo-app`/`internal-tool` are stale `.next`
validators referencing the old `[...stack]` route name, unrelated to
this change.)
- `turbo run lint` — `@hexclave/shared` and `@hexclave/docs-mintlify`
pass.
<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Fixes the Next.js layout example in the setup prompt to include the
required <html>/<body> shell and place
`HexclaveProvider`/`HexclaveTheme` inside `<body>`, preventing the React
style-outside-document error. Also makes the warning before the example
a clear, complete sentence that leads into the correct setup.
- **Bug Fixes**
- Updated Next.js example in `ai-setup-prompt.ts` to render
`<html>`/`<body>` and nest providers inside `<body>`; added a clear “do
not wrap `<html>`” note.
- Reworded the warning before the example to end as a full sentence and
introduce the correct snippet.
- Removed unused `Suspense` import.
- Regenerated `docs-mintlify/guides/getting-started/setup.mdx`,
`docs-mintlify/llms-full.txt`, and snippets (home prompt island, agent
reminders) to propagate the change.
<sup>Written for commit
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|---|---|---|
| .. | ||
| src | ||
| .eslintrc.cjs | ||
| LICENSE | ||
| package.json | ||
| tsconfig.json | ||
| tsdown.config.ts | ||
| vitest.config.ts | ||
