Added RevisionCard

keystatic.config.ts

@@ -1,12 +1,21 @@
 import { config } from '@keystatic/core'
 
 import { contentCollections } from '@/keystatic/collections/general'
+import { siteCollections } from '@/keystatic/collections/site'
+import { ARTICLES, PAGES, RELEASES, TAGS } from '@/lib/constants/collections'
 
 export default config({
   storage: {
     kind: 'local',
   },
+  ui: {
+    navigation: {
+      Content: [ARTICLES, PAGES, TAGS],
+      Site: [RELEASES],
+    },
+  },
   collections: {
     ...contentCollections,
+    ...siteCollections,
   },
 })

src/components/post/ArticleCard/ArticleCardItem.astro

@@ -10,7 +10,7 @@ type Props = {
 const { article } = Astro.props
 
 const { cover, excerpt } = article.summary
-const date = article.published
+const date = article.publishedAt
 ---
 
 <article class="card">

src/components/post/Footer/ArticleFooter.astro

@@ -1,17 +1,22 @@
 ---
 import type { Sequence } from '@/lib/site/navigation'
+import type { Article } from '@/lib/site/types'
 
+import RevisionCard from './RevisionCard.astro'
 import SequenceNav from './SequenceNav.astro'
 
 type Props = {
+  article: Article
   sequence: Sequence | null
 }
 
-const { sequence } = Astro.props
+const { article, sequence } = Astro.props
+const { title, changes } = article
 ---
 
-{sequence && (
+{(changes.length > 0 || sequence) && (
   <footer class="article-footer">
-    <SequenceNav sequence={sequence} />
+    {changes.length > 0 && <RevisionCard title={title} changes={changes} />}
+    {sequence && <SequenceNav sequence={sequence} />}
   </footer>
 )}

src/components/post/Footer/RevisionCard.astro

@@ -0,0 +1,38 @@
+---
+import { CHANGE_TYPES } from '@/lib/constants/changelog'
+import { toMilitaryDTG } from '@/lib/content/dates'
+import type { Change } from '@/lib/site/types'
+
+type Props = {
+  title: string
+  changes: Change[]
+}
+
+const LIMIT = 5
+
+const { title, changes } = Astro.props
+
+const labelOf = (kind: Change['kind']) =>
+  CHANGE_TYPES.find((option) => option.value === kind)?.label ?? kind
+---
+
+<section class="revision-card" aria-labelledby="revisions-heading">
+  <div class="revision-card__head">
+    <h2 id="revisions-heading" class="revision-card__heading">
+      Revisions
+    </h2>
+    <p class="revision-card__subject">{title}</p>
+  </div>
+  <ol class="revision-card__list">
+    {changes.slice(0, LIMIT).map(({ kind, text, release }) => (
+      <li class="revision-card__row">
+        <span class="revision-card__version">v{release.version}</span>
+        <time class="revision-card__date" datetime={release.date.toISOString()}>
+          {toMilitaryDTG(release.date)}
+        </time>
+        <span class="revision-card__kind">{labelOf(kind)}</span>
+        <p class="revision-card__text">{text}</p>
+      </li>
+    ))}
+  </ol>
+</section>

src/components/post/Header/ArticleHeader.astro

@@ -15,7 +15,7 @@ type Props = {
 const { article } = Astro.props
 
 const crumbs = trailOf(article)
-const published = article.published
+const published = article.publishedAt
 ---
 
 <header class="article-header">

src/components/post/Header/Meta.astro

@@ -11,8 +11,10 @@ type Props = {
 const { article } = Astro.props
 const site = await getSite()
 const tags = article.tags.map((id) => site.tags.get(id)).filter((tag) => tag !== undefined)
-const date = article.updated ?? article.published
+const latest = article.changes[0]?.release.date
-const dateLabel = article.updated ? 'Updated' : 'Published'
+const updated = latest && article.publishedAt && latest > article.publishedAt ? latest : null
+const date = updated ?? article.publishedAt
+const dateLabel = updated ? 'Updated' : 'Published'
 ---
 
 <dl class="article-header__meta">

src/content/general/articles/calcination.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/coagulation.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/conjunction.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/dissolution.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/fermentation.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/prima-materia.mdoc

@@ -15,7 +15,6 @@ summary:
     credit: John Martin – The Great Day of His Wrath
     effect: xeroxed
     ratio: 21-9
-dates:
 published: 2026-09-21T12:35:00.000Z
 tags:
   - the-crucible

src/content/general/articles/stages.mdoc

@@ -10,7 +10,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-21T12:34:00.000Z
 tags: []
 ---

src/content/general/articles/sublimation.mdoc

@@ -12,7 +12,6 @@ summary:
   cover:
     effect: none
     ratio: original
-dates:
 published: 2026-09-30T12:27:00.000Z
 tags:
   - alchemical-materialism

src/content/general/articles/the-crucible.mdoc

@@ -8,7 +8,6 @@ summary:
     Where we explore the crucible – a materialistic alchemist Worldbuilding
     Framework
   cover: {}
-dates:
 published: 2026-09-21T12:33:00.000Z
 tags:
   - the-crucible

src/content/site/releases/v0-12.yaml

@@ -0,0 +1,6 @@
+version: '0.12'
+date: 2026-09-30T13:00:00.000Z
+changes:
+  - kind: added
+    article: prima-materia
+    text: Section on the ground state; first table of correspondences

src/content/site/releases/v0-13.yaml

@@ -0,0 +1,12 @@
+version: '0.13'
+date: 2026-09-30T13:00:00.000Z
+changes:
+  - kind: added
+    article: calcination
+    text: Test
+  - kind: added
+    article: fermentation
+    text: Big test with a longer sentence
+  - kind: changed
+    article: coagulation
+    text: Lorem ipsum, blablabla ipbsum whorum

src/content/site/releases/v0-14.yaml

@@ -0,0 +1,19 @@
+version: '0.14'
+date: 2026-09-30T13:00:00.000Z
+changes:
+  - kind: added
+    article: coagulation
+    text: >-
+      s the raw release exactly as Keystatic reads it, inferred from the schema
+      like the other three
+  - kind: changed
+    article: prima-materia
+    text: >-
+      releases are loaded, resolved and attached to articles. Six files; nothing
+      renders yet.
+  - kind: fixed
+    article: fermentation
+    text: We don't burn the priests anymore, we burn the gods
+  - kind: removed
+    article: the-crucible
+    text: AND EVERYTHING GOES BOOOOOOOM

src/keystatic/collections/general/articles.ts

@@ -1,8 +1,7 @@
 import { collection, fields } from '@keystatic/core'
 
-import { base, stage } from '@/keystatic/fields/content/base'
+import { base, published, stage } from '@/keystatic/fields/content/base'
 import { content } from '@/keystatic/fields/content/content'
-import { dates } from '@/keystatic/fields/content/dates'
 import { articleRoute } from '@/keystatic/fields/content/route'
 import { articleSummary } from '@/keystatic/fields/content/summary'
 import { ARTICLES, TAGS } from '@/lib/constants/collections'
@@ -21,7 +20,7 @@ export const articles = collection({
     stage,
     route: articleRoute,
     summary: articleSummary(ARTICLES),
-    dates,
+    published,
     tags: fields.multiRelationship({
       label: 'Tags',
       collection: TAGS,

src/keystatic/collections/site/index.ts

@@ -0,0 +1,7 @@
+import { RELEASES } from '@/lib/constants/collections'
+
+import { releases } from './releases'
+
+export const siteCollections = {
+  [RELEASES]: releases,
+}

src/keystatic/collections/site/releases.ts

@@ -0,0 +1,66 @@
+import { collection, fields } from '@keystatic/core'
+
+import { CHANGE_TYPES } from '@/lib/constants/changelog'
+import { ARTICLES, RELEASES } from '@/lib/constants/collections'
+
+const VERSION = /^\d+\.\d+(\.\d+)?$/
+
+export const releases = collection({
+  label: 'Releases',
+  slugField: 'version',
+  path: `src/content/site/${RELEASES}/*`,
+  columns: ['version', 'date'],
+  schema: {
+    version: fields.slug({
+      name: {
+        label: 'Version',
+        description: 'Without the v: 0.12, 1.0, 1.0.3',
+        validation: {
+          isRequired: true,
+          pattern: {
+            regex: VERSION,
+            message: 'Numbers separated by dots, like 0.12 or 1.0.3',
+          },
+        },
+      },
+      slug: {
+        label: 'File ID',
+        generate: (version) => `v${version.replaceAll('.', '-')}`,
+      },
+    }),
+    date: fields.datetime({
+      label: 'Date',
+      defaultValue: {
+        kind: 'now',
+      },
+      validation: {
+        isRequired: true,
+      },
+    }),
+    changes: fields.array(
+      fields.object({
+        kind: fields.select({
+          label: 'Kind',
+          options: CHANGE_TYPES,
+          defaultValue: 'added',
+        }),
+        article: fields.relationship({
+          label: 'Article',
+          description: 'Empty for site-wide changes',
+          collection: ARTICLES,
+        }),
+        text: fields.text({
+          label: 'Text',
+          validation: {
+            isRequired: true,
+          },
+        }),
+      }),
+      {
+        label: 'Changes',
+        itemLabel: (props) =>
+          `${props.fields.kind.value} · ${props.fields.article.value ?? 'site'} · ${props.fields.text.value}`,
+      },
+    ),
+  },
+})

src/keystatic/fields/content/base.ts

@@ -45,6 +45,13 @@ export const noindex = fields.checkbox({
   label: 'Hide from search engines',
 })
 
+export const published = fields.datetime({
+  label: 'Published',
+  defaultValue: {
+    kind: 'now',
+  },
+})
+
 export const base = {
   title,
   subtitle,

src/keystatic/fields/content/dates.ts

@@ -1,18 +0,0 @@
-import { fields } from '@keystatic/core'
-
-export const dates = fields.object(
-  {
-    published: fields.datetime({
-      label: 'Published',
-      defaultValue: {
-        kind: 'now',
-      },
-    }),
-    updated: fields.datetime({
-      label: 'Updated',
-    }),
-  },
-  {
-    label: 'Dates',
-  },
-)

src/layouts/general/ArticleLayout.astro

@@ -38,7 +38,7 @@ const sequence = sequenceOf(article)
         <FootnoteList footnotes={rendered.footnotes} />
       </div>
     </div>
-    <ArticleFooter sequence={sequence} />
+    <ArticleFooter sequence={sequence} article={article} />
   </article>
   <DevBanner
     collection={article.collection}
@@ -58,12 +58,10 @@ const sequence = sequenceOf(article)
     gap: var(--layout-gutter);
 
     @media (--bp-desktop) {
+      @mixin layout-columns;
+
       display: grid;
-      grid-template-columns:
+      row-gap: var(--layout-gutter);
-        [rail-start] minmax(var(--layout-rail-width), 1fr)
-        [rail-end body-start] var(--layout-content-width)
-        [body-end margin-start] var(--layout-margin-width) [margin-end];
-      gap: var(--layout-gutter);
       align-items: start;
     }
   }

src/lib/constants/changelog.ts

@@ -0,0 +1,20 @@
+export const CHANGE_TYPES = [
+  {
+    label: 'Added',
+    value: 'added',
+  },
+  {
+    label: 'Changed',
+    value: 'changed',
+  },
+  {
+    label: 'Fixed',
+    value: 'fixed',
+  },
+  {
+    label: 'Removed',
+    value: 'removed',
+  },
+] as const
+
+export type ChangeType = (typeof CHANGE_TYPES)[number]['value']

src/lib/constants/collections.ts

@@ -3,3 +3,6 @@
 export const ARTICLES = 'articles'
 export const PAGES = 'pages'
 export const TAGS = 'tags'
+
+/* === SITE COLLECTIONS === */
+export const RELEASES = 'releases'

src/lib/content/load.ts

@@ -1,8 +1,8 @@
-import { ARTICLES, PAGES, TAGS } from '../constants/collections'
+import { ARTICLES, PAGES, RELEASES, TAGS } from '../constants/collections'
 import { createDiagnostics } from '../diagnostics'
 import type { Diagnostics } from '../diagnostics/types'
 import { createContentReader } from './reader'
-import type { ArticleEntry, Content, PageEntry, TagEntry } from './types'
+import type { ArticleEntry, Content, PageEntry, ReleaseEntry, TagEntry } from './types'
 
 interface CollectionReader<T> {
   list(): Promise<string[]>
@@ -36,10 +36,11 @@ async function readAll<T>(
 export async function loadContent(): Promise<Content> {
   const { collections } = createContentReader()
   const problems = createDiagnostics()
-  const [articles, pages, tags] = await Promise.all([
+  const [articles, pages, tags, releases] = await Promise.all([
     readAll<ArticleEntry>(collections.articles, ARTICLES, problems),
     readAll<PageEntry>(collections.pages, PAGES, problems),
     readAll<TagEntry>(collections.tags, TAGS, problems),
+    readAll<ReleaseEntry>(collections.releases, RELEASES, problems),
   ])
-  return { articles, pages, tags, diagnostics: problems.list }
+  return { articles, pages, tags, releases, diagnostics: problems.list }
 }

src/lib/content/types.ts

@@ -9,10 +9,12 @@ type Collections = typeof config.collections
 export type ArticleEntry = Entry<Collections['articles']>
 export type PageEntry = Entry<Collections['pages']>
 export type TagEntry = Entry<Collections['tags']>
+export type ReleaseEntry = Entry<Collections['releases']>
 
 export type Content = {
   articles: Map<string, ArticleEntry>
   pages: Map<string, PageEntry>
   tags: Map<string, TagEntry>
+  releases: Map<string, ReleaseEntry>
   diagnostics: Diagnostic[]
 }

src/lib/site/index.ts

@@ -3,6 +3,7 @@ import { loadContent } from '../content/load'
 import type { Content } from '../content/types'
 import { createDiagnostics } from '../diagnostics'
 import type { Diagnostics } from '../diagnostics/types'
+import { collectReleases } from './releases'
 import {
   isBuilt,
   newestFirst,
@@ -58,6 +59,7 @@ export function buildSite(content: Content, visibility: Visibility): Site {
   const articles = placeArticles(content, visibility, problems)
   const pages = placePages(content, visibility, problems)
   const tags = collectTags(content, articles)
+  const releases = collectReleases(content, articles, problems)
   validate(articles.values(), content, problems)
   const byPath = indexUrls([...articles.values(), ...pages.values()], problems)
   const roots = [...articles.values()]
@@ -68,6 +70,7 @@ export function buildSite(content: Content, visibility: Visibility): Site {
     articles,
     pages,
     tags,
+    releases,
     byPath,
     known: new Set(content.articles.keys()),
     roots,

src/lib/site/releases.ts

@@ -0,0 +1,59 @@
+import { RELEASES } from '../constants/collections'
+import { parseDate } from '../content/dates'
+import type { Content } from '../content/types'
+import type { Diagnostics } from '../diagnostics/types'
+import type { Article, Release } from './types'
+
+const partsOf = (version: string) => version.split('.').map(Number)
+
+function compareVersions(a: string, b: string): number {
+  const [left, right] = [partsOf(a), partsOf(b)]
+  for (let i = 0; i < Math.max(left.length, right.length); i++) {
+    const difference = (left[i] ?? 0) - (right[i] ?? 0)
+    if (difference) return difference
+  }
+  return 0
+}
+
+const releaseOrder = (a: Release, b: Release) => compareVersions(b.version, a.version)
+
+export function collectReleases(
+  content: Content,
+  articles: Map<string, Article>,
+  problems: Diagnostics,
+): Release[] {
+  const releases: Release[] = []
+
+  for (const [id, entry] of content.releases) {
+    const date = parseDate(entry.date)
+    if (!date) {
+      problems.error(RELEASES, id, 'Needs a date')
+      continue
+    }
+
+    const release: Release = { id, version: entry.version, date, changes: [] }
+    for (const { kind, article: target, text } of entry.changes) {
+      const article = target ? articles.get(target) : null
+      if (target && !article) {
+        if (!content.articles.has(target))
+          problems.error(RELEASES, id, `Article "${target}" does not exist`)
+        continue
+      }
+      release.changes.push({ kind, article: article ?? null, text, release })
+    }
+
+    if (release.changes.length) releases.push(release)
+  }
+
+  releases.sort(releaseOrder)
+  releases.forEach((release, i) => {
+    const older = releases[i + 1]
+    if (older && release.date < older.date)
+      problems.warning(RELEASES, release.id, `Dated before v${older.version}`)
+  })
+
+  for (const release of releases)
+    for (const change of release.changes) change.article?.changes.push(change)
+
+  return releases
+}

src/lib/site/rules.ts

@@ -27,7 +27,7 @@ export function segmentProblem(segment: string, atRoot: boolean): string | null
 const time = (date: Date | null) => date?.getTime() ?? 0
 const UNINDEXED = Number.MAX_SAFE_INTEGER
 
-export const newestFirst = (a: Article, b: Article) => time(b.published) - time(a.published)
+export const newestFirst = (a: Article, b: Article) => time(b.publishedAt) - time(a.publishedAt)
 
 export const siblingOrder = (a: Article, b: Article) =>
   (a.route.index ?? UNINDEXED) - (b.route.index ?? UNINDEXED) ||

src/lib/site/tree.ts

@@ -54,10 +54,10 @@ export function placeArticles(
       id,
       path: `${parent?.path ?? ''}/${segment}`,
       listed: isListed(entry.status, visibility),
-      published: parseDate(entry.dates.published),
+      publishedAt: parseDate(entry.published),
-      updated: parseDate(entry.dates.updated),
       parent,
       children: [],
+      changes: [],
     }
     placed.set(id, article)
     return article

src/lib/site/types.ts

@@ -1,3 +1,4 @@
+import type { ChangeType } from '../constants/changelog'
 import { ARTICLES, PAGES, TAGS } from '../constants/collections'
 import type { ArticleEntry, PageEntry, TagEntry } from '../content/types'
 import type { Diagnostic } from '../diagnostics/types'
@@ -7,10 +8,10 @@ export type Article = ArticleEntry & {
   id: string
   path: string
   listed: boolean
-  published: Date | null
+  publishedAt: Date | null
-  updated: Date | null
   parent: Article | null
   children: Article[]
+  changes: Change[]
 }
 
 export type Page = PageEntry & {
@@ -26,12 +27,27 @@ export type Tag = TagEntry & {
   articles: Article[]
 }
 
+export type Release = {
+  id: string
+  version: string
+  date: Date
+  changes: Change[]
+}
+
+export type Change = {
+  kind: ChangeType
+  article: Article | null
+  text: string
+  release: Release
+}
+
 export type Routed = Article | Page
 
 export type Site = {
   articles: Map<string, Article>
   pages: Map<string, Page>
   tags: Map<string, Tag>
+  releases: Release[]
   byPath: Map<string, Routed>
   known: Set<string>
   roots: Article[]

src/lib/site/validate.ts

@@ -4,17 +4,16 @@ import type { Diagnostics } from '../diagnostics/types'
 import type { Article } from './types'
 
 export function validate(articles: Iterable<Article>, content: Content, problems: Diagnostics) {
-  for (const { id, status, summary, published, updated, tags } of articles) {
+  for (const { id, status, summary, publishedAt, tags } of articles) {
     const { excerpt, cover } = summary
     const error = (message: string) => problems.error(ARTICLES, id, message)
     const warn = (message: string) => problems.warning(ARTICLES, id, message)
 
     if (status !== 'draft' && !excerpt) error('Needs an excerpt')
-    if (status !== 'draft' && !published) error('Needs a published date')
+    if (status !== 'draft' && !publishedAt) error('Needs a published date')
     if (cover.image && !cover.alt) error('Cover image needs alt text')
     if (!cover.image && (cover.alt || cover.caption || cover.credit))
       warn('The cover has text but not image!')
-    if (published && updated && updated < published) warn('Updated before it was published')
     for (const tag of tags) if (!content.tags.has(tag)) error(`Tag "${tag}" does not exist`)
   }
 }

src/styles/components/post/article-footer.css

@@ -5,5 +5,17 @@
 
     display: grid;
     gap: var(--size-10);
+
+    @media (--bp-desktop) {
+      @mixin layout-columns;
+
+      & > .revision-card {
+        grid-column: body-start / body-end;
+      }
+
+      & > .sequence-nav {
+        grid-column: rail-start / margin-end;
+      }
+    }
   }
 }

src/styles/components/post/article-header.css

@@ -109,17 +109,10 @@
   .article-header__tag {
     @mixin py var(--size-1);
     @mixin px var(--size-3);
-
+    @mixin typo_tag;
     display: block;
-
-    font-size: var(--type--2);
-    font-weight: var(--font-weight-emphasis);
-    line-height: var(--leading--2);
     color: var(--color-text-inverse);
-    letter-spacing: var(--tracking-tag);
-
     background-color: var(--color-surface-inverse);
-
     transition: background-color var(--motion-fast) var(--ease-out);
 
     &:hover {

src/styles/components/post/index.css

@@ -2,3 +2,4 @@
 @import url("stage-badge.css");
 @import url("article-footer.css");
 @import url("sequence-nav.css");
+@import url("revision-card.css");

src/styles/components/post/revision-card.css

@@ -0,0 +1,92 @@
+@layer components.blocks {
+  .revision-card {
+    @mixin border-t var(--border-boundary), solid, var(--color-border-strong);
+    @mixin pt var(--size-8);
+  }
+
+  .revision-card__head {
+    @mixin mb var(--size-6);
+
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--size-2) var(--size-6);
+    align-items: baseline;
+    justify-content: space-between;
+  }
+
+  .revision-card__heading {
+    @mixin typo_heading-2;
+    @mixin ma var(--size-0);
+  }
+
+  .revision-card__subject {
+    @mixin typo_eyebrow;
+    @mixin ma var(--size-0);
+
+    color: var(--color-text-secondary);
+  }
+
+  .revision-card__list {
+    @mixin ma var(--size-0);
+    @mixin pa var(--size-0);
+
+    list-style: none;
+
+    @media (--bp-tablet-up) {
+      display: grid;
+      grid-template-columns: auto auto auto minmax(0, 1fr);
+      column-gap: var(--size-10);
+    }
+  }
+
+  .revision-card__row {
+    @mixin border-b var(--border-hairline), solid, var(--color-border-subtle);
+    @mixin py var(--size-6);
+
+    display: grid;
+    grid-template-columns: auto auto minmax(0, 1fr);
+    gap: var(--size-2) var(--size-8);
+    align-items: baseline;
+
+    font-family: var(--font-mono);
+    font-size: var(--type-0);
+    line-height: var(--leading-0);
+
+    @media (--bp-tablet-up) {
+      grid-column: 1 / -1;
+      grid-template-columns: subgrid;
+    }
+  }
+
+  .revision-card__version {
+    font-weight: var(--font-weight-emphasis);
+    color: var(--color-text-primary);
+  }
+
+  .revision-card__date {
+    color: var(--color-text-quiet);
+  }
+
+  .revision-card__kind {
+    @mixin typo_tag;
+    @mixin py var(--size-1);
+    @mixin px var(--size-3);
+
+    justify-self: start;
+    color: var(--color-text-inverse);
+    background-color: var(--color-surface-inverse);
+  }
+
+  .revision-card__text {
+    @mixin ma var(--size-0);
+
+    grid-column: 1 / -1;
+    font-family: var(--font-body);
+    line-height: var(--leading-prose-tight);
+    color: var(--color-text-primary);
+
+    @media (--bp-tablet-up) {
+      grid-column: auto;
+    }
+  }
+}

src/styles/mixins/helpers.css

@@ -15,3 +15,11 @@
 
   width: min(100% - 2 * var(--layout-page-margin), var(--layout-wrapper-width));
 }
+
+@define-mixin layout-columns {
+  grid-template-columns:
+    [rail-start] minmax(var(--layout-rail-width), 1fr)
+    [rail-end body-start] var(--layout-content-width)
+    [body-end margin-start] var(--layout-margin-width) [margin-end];
+  column-gap: var(--layout-gutter);
+}

src/styles/mixins/typography.css

@@ -108,3 +108,12 @@
   text-transform: uppercase;
   letter-spacing: var(--tracking-eyebrow);
 }
+
+@define-mixin typo_tag {
+  font-family: var(--font-mono);
+  font-size: var(--type--2);
+  font-weight: var(--font-weight-emphasis);
+  line-height: var(--leading--2);
+  text-transform: uppercase;
+  letter-spacing: var(--tracking-tag);
+}