fix: hastscript v9 named-export break in llms-txt rehype plugin

[anegg0]

Description

Fixes a regression in the llms-txt build caused by the hastscript 6.0.0 → 9.0.1 bump. hastscript v7+ is ESM-only and replaced its default export with named exports ({ h, s }), so const h = require('hastscript') returned the module namespace object instead of the h function. Every h(...) call in the rehype-llms-cleanup plugin then threw "h is not a function", and docusaurus-plugin-llms-txt skipped affected routes (for example /stylus/reference/stylus-toml-reference) with "Failed to convert HTML to Markdown".

The fix destructures the named export:

-const h = require('hastscript');
+const { h } = require('hastscript');

Extracted from #3349 so it can merge to master independently of the Inside Arbitrum Nitro docs rewrite. master currently ships hastscript@^9 with the old import, so this fixes a live build warning on master.

Document type

• Codebase changes

Checklist

• My code follows the existing code style and conventions
• I have tested my changes locally with yarn build
• I have verified that my changes don't break the build

Additional Notes

Verified with a full yarn build: docusaurus-plugin-llms-txt reports "Plugin completed successfully — processed 285 documents", and the "h is not a function" / "Failed to convert HTML to Markdown" warnings are gone.

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Project	Deployment	Actions	Updated (UTC)
arbitrum-docs	Ready	Preview	Jun 10, 2026 7:58pm