diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 05ec043d..58ac9f32 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -29,5 +29,7 @@ jobs:
       #     site in quartz/cli/fixtures/serve and fails if it binds anything other
       #     than loopback, or if a request path that escapes the output directory is
       #     answered instead of refused.
+      - name: Type check and format check
+        run: npm run check
       - name: Run tests
         run: npm test
diff --git a/.prettierignore b/.prettierignore
index 69663031..31515a96 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -3,3 +3,6 @@ node_modules
 .quartz-cache
 # Deliberately malformed markup that must reach the parser exactly as written.
 quartz/util/fixtures
+# Wiki content is reviewed prose, and docs is vendored Quartz documentation; neither is formatted source.
+content
+docs
diff --git a/README.md b/README.md
index 9725d0da..406e6102 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,8 @@ Rather than delegating identity to centralized gatekeepers (Google, employers,
 governments), the OpenVTC ecosystem takes a **first-person** approach. Trust is
 built from the ground up through real relationships between real people,
 expressed as cryptographically verifiable credentials. The question becomes not
-just *"who are you?"* but *"can I verify you're a real person through a chain
-of real human relationships?"*
+just _"who are you?"_ but _"can I verify you're a real person through a chain
+of real human relationships?"_
 
 ## Audience
 
diff --git a/quartz.config.ts b/quartz.config.ts
index 58b5144e..3f6f4552 100644
--- a/quartz.config.ts
+++ b/quartz.config.ts
@@ -12,9 +12,7 @@ const config: QuartzConfig = {
     pageTitleSuffix: "",
     enableSPA: true,
     enablePopovers: true,
-    analytics: {
-      provider: "null",
-    },
+    analytics: null,
     locale: "en-US",
     baseUrl: "OpenVTC.github.io/wiki",
     ignorePatterns: ["private", "templates", ".obsidian"],
diff --git a/quartz/components/ArticleTitle.tsx b/quartz/components/ArticleTitle.tsx
index 43f85d1b..3e2331b8 100644
--- a/quartz/components/ArticleTitle.tsx
+++ b/quartz/components/ArticleTitle.tsx
@@ -1,10 +1,9 @@
 import { QuartzComponent, QuartzComponentConstructor, QuartzComponentProps } from "./types"
-import { classNames } from "../util/lang"
 
-const ArticleTitle: QuartzComponent = ({ fileData, displayClass }: QuartzComponentProps) => {
+const ArticleTitle: QuartzComponent = ({ fileData }: QuartzComponentProps) => {
   const title = fileData.frontmatter?.title
   if (title) {
-    return <p></p> // <h1 class={classNames(displayClass, "article-title")}>{title}</h1>
+    return <p></p>
   } else {
     return null
   }
diff --git a/quartz/plugins/transformers/ofm.ts b/quartz/plugins/transformers/ofm.ts
index 1282a0a3..3847c760 100644
--- a/quartz/plugins/transformers/ofm.ts
+++ b/quartz/plugins/transformers/ofm.ts
@@ -510,7 +510,7 @@ export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options>>
                 node.data = {
                   hProperties: {
                     ...(node.data?.hProperties ?? {}),
-                    className: classNames.join(" "),
+                    className: classNames,
                     "data-callout": calloutType,
                     "data-callout-fold": collapse,
                     "data-callout-metadata": calloutMetaData,
diff --git a/tsconfig.json b/tsconfig.json
index 637d0960..ec76517a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,6 +5,7 @@
     "module": "esnext",
     "target": "esnext",
     "moduleResolution": "node",
+    "ignoreDeprecations": "6.0",
     "strict": true,
     "incremental": true,
     "resolveJsonModule": true,