- [#3977](https://github.com/withastro/astro/pull/3977) [`19433eb4a`](https://github.com/withastro/astro/commit/19433eb4a4441522f68492ca914ad2ab4f061343) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Add remarkPlugins and rehypePlugins to config, with the same default plugins as our standard Markdown parser
* [#4002](https://github.com/withastro/astro/pull/4002) [`3b8a74452`](https://github.com/withastro/astro/commit/3b8a7445247221100462ba035f6778b43ea180e7) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Support Prism and Shiki syntax highlighting based on project config
- [#3995](https://github.com/withastro/astro/pull/3995) [`b2b367c96`](https://github.com/withastro/astro/commit/b2b367c969493aaf21c974064beb241d05228066) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Support YAML frontmatter in MDX files
### Patch Changes
- [#4050](https://github.com/withastro/astro/pull/4050) [`9ab66c4ba`](https://github.com/withastro/astro/commit/9ab66c4ba9bf2250990114c76b792f26d0694365) Thanks [@FredKSchott](https://github.com/FredKSchott)! - Add support for injected "page-ssr" scripts
* [#3981](https://github.com/withastro/astro/pull/3981) [`61fec6304`](https://github.com/withastro/astro/commit/61fec63044e1585348e8405bee6fdf4dec635efa) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Include page url in MDX glob result
- [#3854](https://github.com/withastro/astro/pull/3854) [`b012ee55`](https://github.com/withastro/astro/commit/b012ee55b107dea0730286263b27d83e530fad5d) Thanks [@bholmesdev](https://github.com/bholmesdev)! - [astro add] Support adapters and third party packages