Answer architecture round 1: one owner for the image's ADF shape, the readings' decision, marker paragraphs, the exceptions the README names; items 87 filed and 56 widened

docs/decisions.md

@@ -202,6 +202,19 @@ link reference definition — and a directive link CommonMark could spell is ref
 link — the bracket form goes literal, the directive form refused — which is CommonMark's prose
 where its reference implementation nests one `<a>` in another.
 
+## What ADF holds no node for reads as a link
+
+2026-10-04, the maintainer and a writer panel, 3 of 3; `[]()` 2026-10-09, by Goals 4 and 7. Goals 4,
+5 and 6. Valid while `mediaInline` carries no URL and ADF holds no empty text node.
+
+Every reader reads every CommonMark image and empty link. An image anywhere but alone in a plain
+paragraph reads as its alt text linked to its URL, titled by its title; an empty alt text reads as
+the URL, and an empty link text as its destination. `[]()` reads as nothing: it renders nothing, so
+Goal 7 loses no content. A titled image alone in a plain paragraph reads as the image captioned with
+its title. A link alone in a plain paragraph whose whole text is an image reads as the image with
+the link marking its `media`. Inside a link otherwise, the alt text is plain text the link marks and
+the image's URL drops: the panel chose this by Goal 6, which outranks Goal 7.
+
 ## Ids stay site-local
 
 2026-08-23, the maintainer. Goal 1. Valid while ADF ids are minted per site.