Say equality is deep over the document's JSON values

README.md

@@ -204,9 +204,9 @@ emit refuses:
 
 Serves Goals 1, 3 and 4.
 
-- `markdownToAdf(adfToMarkdown(doc))` deep-equals `doc` — every key and value as `doc` holds it,
-  adjacent text nodes, an empty `attrs`, `content` or `marks` and `-0` included, and unknown node
-  types carried opaquely
+- `markdownToAdf(adfToMarkdown(doc))` deep-equals `doc` as JSON, for a document of plain objects
+  as `JSON.parse` builds them — every key and value as `doc` holds it, adjacent text nodes, an
+  empty `attrs`, `content` or `marks` and `-0` included, and unknown node types carried opaquely
   ([`docs/decisions.md`](https://gitea.larvit.se/larvit/adf-codec/src/branch/main/docs/decisions.md#unknown-nodes-ride-the-carry)).
 - Markdown this library reads, and markdown it writes, means what the CommonMark spec says; from
   `0.2.0`, well-formed HTML means what the HTML standard says, read or written. The bullets below

docs/decisions.md

@@ -36,8 +36,10 @@ does not imply a spellable document; `corpus/commonmark-spec/exceptions.json` na
 2026-08-24, deep 2026-10-03, the maintainer. Goal 1. Valid while a pipeline or a bot can build a
 shape the editor would not.
 
-"Equals" is `assert.deepStrictEqual`: every key and value `doc` holds, two adjacent text nodes, an
-empty `attrs`, `content` or `marks` and `-0` included, with no normalization on either side.
+"Equals" is deep equality over the document's JSON values: `assert.deepStrictEqual` on plain
+objects as `JSON.parse` builds them, since ADF is JSON. Every key and value `doc` holds counts, two
+adjacent text nodes, an empty `attrs`, `content` or `marks` and `-0` included, with no
+normalization on either side.
 CommonMark's spelling stays wherever a document holds none of those shapes. The plain reader
 builds what is written, as `markdownToAdf` does. Only the plain writer is lossy: its reduction
 reads and writes editor-normal ADF — adjacent text nodes of identical marks and no attributes