REAL-WORLD-SCHEMAS-02: Type the ADR frontmatter

What it demonstrates

Layering frontmatter typing onto the ADR: an enum status and a format-checked required date.

Builds on: REAL-WORLD-SCHEMAS-01: ADR: require the four sections in order

How it’s done

The declarative YAML artifact, verbatim — no code required.

frontmatter:
  strict: true
  fields:
    status:
      enum: [proposed, accepted, superseded, deprecated]
    date:
      type: string
      format: date
# (body: the strict Status/Context/Decision/Consequences sections from 01)

Surfaces exercised

• declarative frontmatter.fields: enum -> frontmatter/enum; format: date -> frontmatter/type
• strict: true rejects unknown keys -> frontmatter/unknown-key (z.strictObject under the hood)