Answer architecture round 1: 2 🔴, 6 🟡 (0 misread); carried JSON read through adf/, one spelling home per element in html/, block readers in one table, the first paragraph's form shared, a lint boundary for html/parse, a strictness oracle

src/html/mark-elements.ts

@@ -0,0 +1,15 @@
+// The element each mark but a link writes around text, holding no attribute; a link writes `<a>`.
+const markElements: ReadonlyMap<string, string> = new Map([
+  ['code', 'code'],
+  ['em', 'em'],
+  ['strong', 'strong'],
+])
+
+export function elementOfMark(type: string): string | undefined {
+  return markElements.get(type)
+}
+
+export function markOfElement(name: string): string | undefined {
+  for (const [type, element] of markElements) if (element === name) return type
+  return undefined
+}