frontmatter core
The data layer between Astro and real CMS.
Turns Astro, Markdown and YAML into clean, editable content models.
Build-time only. No runtime. No lock-in.
Modern frontends are fast.
CMS are powerful.
But they don’t speak the same language.
Astro components use props
CMS use data models
Someone has to translate.
Frontmatter is that translation.
Input
- .astro
- .md
- .yaml
Frontmatter Core
- Scans
- Extracts
- Builds a typed content model
Output
- JSON IR
- Adapter-ready
- Static or dynamic
The IR
Frontmatter produces a stable Intermediate Representation.
{
"pages": [
{
"route": "/",
"fields": ["title", "subtitle"]
}
],
"datasets": ["works", "posts"]
}Open by design
Frontmatter Core is MIT licensed.
You can build anything on top of it.
Adapters plug into the same IR — they live outside the core (reference or community-built).
This is just the core.
Paid tools may exist on top of it
(packaging and convenience, not managed services).