Goal 5's omission-note sentence moves to the plain flavour's spellings decision

README.md

@@ -40,11 +40,9 @@ In priority order.
    flavour's directive form carries only what CommonMark cannot hold.
 5. **Lossy conversion keeps the content.** `adfToPlainMarkdown` and `plainMarkdownToAdf` drop what
    plain markdown cannot hold — format, design, structure — never content: what a reader of the
-   rendered document sees or follows, its text, images and link targets. Content the document only
+   rendered document sees or follows, its text, images and link targets. The lossy pair creates and
-   references is marked where it stood, by a note that reads as the converter's and names what was
+   exports; it never saves back over the document it read — a document's identity (task, mention,
-   left out. The lossy pair creates and exports; it never saves back over the document it read —
+   media ids) survives a round trip only through the lossless pair.
-   a document's identity (task, mention, media ids) survives a round trip only through the lossless
-   pair.
 6. **What happens is what the audience expects.** Where the goals leave a choice, a conversion
    takes the one its audience would predict, reading the input as written.
 7. **Failures are values.** Nothing throws, and `code` is a closed list — as much a contract as

docs/decisions.md

@@ -158,6 +158,8 @@ renderer confirming each shape. Reader panels settled `error` as an error panel,
 delimiter, so `は==日本語==で` (3 of 3), `==한국어==에서만` and `iPhone==専用==` (6 of 7) highlight,
 the external image's two forms (6 of 7), the omission notes and a rule opening a list item
 dropping (3 of 3), and a list's numbering overflowing into bullets (3 of 3, 5 of 7).
+Content the document only references is marked where it stood, by a note that reads as the
+converter's and names what was left out.
 Reading takes other tools' spellings, since it reads their output and writes none of them.
 Rejected: `~sub~` and `^sup^` (`~2~` is a strike on GitHub, so `subsup` drops), underline and colour
 spellings, raw HTML (`<details>`, `<mark>`), MkDocs `!!!` and the `:::` admonition family,