Answer stability round 1: tryImage drops an exit the comparison already takes, the README and changelog scope the linked image, and item 101 files the refusal naming its spelling

CHANGELOG.md

@@ -59,8 +59,9 @@
 - **Breaking:** a link reference definition between two list items, after a blank line and at the
   list's own indentation, ends the list, as CommonMark reads it; `0.1.0` read one list. See
   `MIGRATION.md`.
-- **Breaking:** `adfToLosslessMarkdown` writes an external image only a link marks as
-  `[![alt](url)](href)`. Convert stored markdown per `MIGRATION.md`.
+- **Breaking:** `adfToLosslessMarkdown` writes a centered, uncaptioned external image whose one
+  mark is a link holding only `href` and `title` as `[![alt](url)](href "title")`. Convert stored
+  markdown per `MIGRATION.md`.
 - Fix the time `adfToLosslessMarkdown` and `adfToPortableMarkdown` take on text holding a long run of
   `*`, `_`, `~` or backticks, or a heading ending in a long run of `#`: the time is linear in the
   run, and a run of 20000 `*` takes milliseconds where it took seconds.

README.md

@@ -133,7 +133,7 @@ saving what this pair read replaces mentions, attachments and macros with text.
 | `decisionList` | a bullet list | — |
 | `mention`, `status`, `emoji`, `date` | their text: `@` kept, a mention with none `@` and its id, an emoji its `shortName` without, a date `2026-09-13` in UTC | — |
 | `inlineCard`, `blockCard`, `embedCard` | a link to the card's URL, else its name | — |
-| external `media` | `![alt](url)` in a block, `[![alt](url)](href)` where a link marks it, `[alt](url)` inline | — |
+| external `media` | in a block `![alt](url)`, or `[![alt](url)](href)` where a link marks it; inline `[alt](url)` | — |
 | stored `media`, `mediaInline`, `extension`, `inlineExtension` | their `alt` or `text` | — |
 | `layoutSection`, `bodiedExtension`, `bodiedSyncBlock`, `multiBodiedExtension`, `extensionFrame`, `caption`, a node this version does not know | its blocks or its text | — |
 | `placeholder` | nothing | — |

src/markdown/emit/image.ts

@@ -12,7 +12,6 @@ export function tryImage(node: AdfNode): string | undefined {
   if (typeof url !== 'string' || (alt !== undefined && typeof alt !== 'string')) return undefined
   const [mark] = nodeMarks(media)
   const link = mark === undefined ? undefined : linkDefinition(nodeAttrs(mark))
-  if (mark !== undefined && link === undefined) return undefined
   const read = centeredImage([externalMedia(alt ?? '', url, link)])
   return serializeCanonicalJson(node, 'compact') === serializeCanonicalJson(read, 'compact') ? tryImageLine(alt, url, link) : undefined
 }

src/markdown/emit/inline-line.ts

@@ -68,7 +68,6 @@ export function tryPipeCell(nodes: readonly AdfNode[], path: ConvertErrorPath, f
   return emitted.value.line
 }
 
-// `link` wraps the image as the link's whole text: `[![alt](url)](href)`.
 export function tryImageLine(alt: string | undefined, url: string, link?: LinkDefinition): string | undefined {
   if (alt !== undefined && (/^[ \t]|[ \t]$|[\n\r]/.test(alt) || holdsNullCharacter(alt))) return undefined
   const destination = spellDestination(url)

todo.md

@@ -6,7 +6,7 @@
 
 `Bar = 9`
 
-`Next ID = 101`
+`Next ID = 102`
 
 | Goal | W |
 |---|---|
@@ -32,6 +32,7 @@
 | 59 | 0.2.1 | decision | **Group the directive grammar into `src/markdown/directive/`, move `Read<T>` to `result.ts`, and move `Flavour` and `flavourClaims` to `markdown/flavour.ts`.** | 3 | 5 | 2 | 6 | 2 | 10.4 |
 | 62 | 0.2.1 | decision | **Move the portable flavour's reading out of `parse/` and its writing out of `emit/` into `markdown/portable/`, so `emit/` no longer imports `portable/`.** | 4 | 5 | 2 | 6 | 2 | 9.4 |
 | 96 | 0.2.1 | defect | **Read and write a text holding many unclosed backtick runs, or many `<!--`, `<?`, `<![CDATA[` or `<!` openers without a terminator, in time linear in the text.** | 2 | 3 | 5 | 9 | 9 | 9.2 |
+| 101 | 0.2.1 |  | **Name the CommonMark spelling to write in the refusal of a directive whose node CommonMark spells.** | 2 | 2 | 4 | 4 | 6 | 9.0 |
 | 92 | 0.2.1 |  | **Lower the reading cost of the files a chunk reads most before its first commit.** | 2 | 4 | 2 | 4 | 1 | 9.0 |
 | 33 | 0.2.1 | defect | **Emit a line in time linear in its mark runs, in `adfToLosslessMarkdown` and `adfToPortableMarkdown`.** | 4 | 5 | 6 | 9 | 9 | 8.7 |
 | 98 | 0.2.1 | defect | **Read blank lines inside deeply nested list items in time linear in the markdown.** | 3 | 3 | 5 | 9 | 9 | 8.2 |
@@ -120,6 +121,12 @@ in a text of length n, backtick runs of lengths 1 to k with no closers cost abou
 repeated with no `-->` is quadratic, in the reader and the emitter's escape walk alike.
 commonmark.js avoids the backtick cost by caching backtick runs by length.
 
+### 101. Name the CommonMark spelling to write in the refusal of a directive whose node CommonMark spells.
+
+`directiveNode` (`src/markdown/parse/markdown-to-adf.ts`) refuses `!adf:mediaSingle` holding a linked
+image with "mediaSingle takes the CommonMark spelling, not the directive form"; the README tells the
+reader to write the spelling the message names, and for `[![alt](url)](href "title")` none is named.
+
 ### 92. Lower the reading cost of the files a chunk reads most before its first commit.
 
 The last five chunks' median is 168135 new input tokens before their first commit, the five before