@astrojs/internal-helpers

Adds the measurements that astro build --timings reports for Markdown processing and syntax highlighting.

Adds YAML parsing with timestamp and merge key support, and formats YAML errors consistently across Astro, Markdown, MDX, and Markdoc.

Allows Astro CLI commands to install tagged package versions

Adds an @astrojs/internal-helpers/mdx entrypoint with the shared helpers the Markdown processor packages use to render .mdx files.

Fixes base path stripping to respect path-segment boundaries. With a configured base such as /docs, a request like /docs-archive/page is no longer treated as being under the base, so routing and context.url.pathname now agree on the same pathname.

Fixes incremental build cache invalidation caused by Shiki mutating the langAlias config object when loading languages