- [#4248](https://github.com/withastro/astro/pull/4248) [`869d00935`](https://github.com/withastro/astro/commit/869d0093596b709cfcc1a1a95ee631b48d6d1c26) Thanks [@svemat01](https://github.com/svemat01)! - Load builtin rehype plugins before user plugins instead of after
* [#4255](https://github.com/withastro/astro/pull/4255) [`411612808`](https://github.com/withastro/astro/commit/4116128082121ee276d51cb245bf8095be4728a1) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Pass injected frontmatter from remark and rehype plugins to layouts
- [#4176](https://github.com/withastro/astro/pull/4176) [`2675b8633`](https://github.com/withastro/astro/commit/2675b8633c5d5c45b237ec87940d5eaf1bfb1b4b) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Support frontmatter injection for MD and MDX using remark and rehype plugins
* [#4174](https://github.com/withastro/astro/pull/4174) [`8eb3a8c6d`](https://github.com/withastro/astro/commit/8eb3a8c6d9554707963c3a3bc36ed8b68d3cf0fb) Thanks [@matthewp](https://github.com/matthewp)! - Allows using React with automatic imports alongside MDX
- [#4145](https://github.com/withastro/astro/pull/4145) [`c7efcf57e`](https://github.com/withastro/astro/commit/c7efcf57e00a0fcde3bc9f813e3cc59902bd484c) Thanks [@FredKSchott](https://github.com/FredKSchott)! - Fix a missing newline bug when `layout` was set.
- [#4095](https://github.com/withastro/astro/pull/4095) [`40ef43a59`](https://github.com/withastro/astro/commit/40ef43a59b08a1a8fbcd9f4a53745a9636a4fbb9) Thanks [@bholmesdev](https://github.com/bholmesdev)! - Add IDs to MDX headings and expose via getHeadings() export
* [#4114](https://github.com/withastro/astro/pull/4114) [`64432bcb8`](https://github.com/withastro/astro/commit/64432bcb873efd0e4297c00fc9583a1fe516dfe7) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Refactor `@astrojs/mdx` and `@astrojs/markdown-remark` to use `@astrojs/prism` instead of duplicating the code
### Patch Changes
- [#4112](https://github.com/withastro/astro/pull/4112) [`e33fc9bc4`](https://github.com/withastro/astro/commit/e33fc9bc46ff0a30013deb6dc76e545e70cc3a3e) Thanks [@matthewp](https://github.com/matthewp)! - Fix MDX working with a ts config file
- [#4076](https://github.com/withastro/astro/pull/4076) [`6120a71e5`](https://github.com/withastro/astro/commit/6120a71e5425ad55a17ddac800d64a3f50273bce) Thanks [@matthewp](https://github.com/matthewp)! - Ensure file and url are always present in MDX for Astro.glob
- [#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