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/parse/source.ts

@@ -1,9 +1,12 @@
+import type { AdfNode } from '../../adf/document.ts'
 import type { ConvertErrorCode, ConvertErrorPath, ParseError, Result, SourcePosition } from '../../result.ts'
 import { unescapedValue } from '../escaping.ts'
 
 // A node's place among its parent's content, the document's own content where `parent` is undefined; a path is built only for a refusal.
 export type Place = { index: number; parent: Place | undefined }
 
+export type ReadNode = Result<{ end: number; node: AdfNode }, ParseError>
+
 // A start tag as `adfToHtml` writes it, its attributes' values unescaped.
 export type StartTag = { attributes: (readonly [string, string])[]; end: number; name: string; start: number }