Patch Changes

• #17124 7e7ab87 Thanks @Princesseuh! - Updates satteri to 0.9.0. See the Sätteri changelog for details.

• #17129 ff7b718 Thanks @Princesseuh! - Adds support for modifying frontmatter programmatically with the default Markdown processor.

  A Sätteri plugin can now read and mutate ctx.data.astro.frontmatter, and Astro uses the result as the page's frontmatter, in both Markdown and MDX.

• #17027 241250b Thanks @ocavue! - Triggers beta prereleases for packages that are still on alpha