Pin the deactivation where an image close folds the evidence away

README.md

@@ -83,7 +83,7 @@ Parsing — `markdownToAdf`, and `htmlToAdf` at `0.2.0`:
 | `malformed-pipe-table` | a pipe row that is no pipe table — a missing or ragged `---` delimiter row, an alignment colon in it, or a row not opening with a pipe | open every row with a pipe and give the delimiter row the header's cell count; to keep the lines literal text instead, escape the leading pipe of every one — escaping a single row leaves the next to open a fresh table and fail the same way |
 | `unknown-directive-name` | a directive whose name is no node or mark this version spells | check the name in `spec/flavour.md`, or escape the prefix as `\!adf:`; the spelling itself is well formed, so a later minor may give the name meaning |
 | `unmappable-html` | the markdown holds a raw HTML tag, comment or processing instruction | remove it or write it in the flavour — ADF holds no raw-HTML node, and the element mapping lands at `0.2.0` |
-| `unmappable-image` | an image sits inside other content, or carries a title | give the image a paragraph of its own and drop the title |
+| `unmappable-image` | an image sits inside other content that is not another image's description, or carries a title | give the image a paragraph of its own and drop the title |
 
 Emitting — `adfToMarkdown`, and `adfToHtml` at `0.2.0`:
 
@@ -121,8 +121,9 @@ emit refuses:
   empty link, a list continuing past a marker change stays one list against CommonMark's two, a
   shortcut reference matching its definition only under Unicode case folding stays unresolved, and
   a link whose text holds an autolink keeps the inner link and leaves the outer brackets literal
-  text, which the spec requires and the reference itself breaks, nesting one `<a>` in the other. The first three are pinned `pending` in `corpus/commonmark-spec/exceptions.json`; the
+  text, which the spec requires and the reference itself breaks, nesting one `<a>` in the other.
-  suite holds no example of the fourth.
+  The first three are pinned `pending` in `corpus/commonmark-spec/exceptions.json`; the suite
+  holds no example of the fourth.
 - Raw HTML in markdown input is an error result, never a silent drop — a tag, a comment and a
   processing instruction alike. ADF holds no raw-HTML node; the element mapping ships at `0.2.0`.
 - Not every document converts back: `adfToMarkdown` is partial on valid ADF — a text node holding

src/markdown/parse/inline-content.ts

@@ -39,7 +39,7 @@ type Run = { canClose: boolean; canOpen: boolean; character: string; index: numb
 // `container` is `undefined` inside a directive's content slot, the emitter's `bracketed`.
 type Scan = {
   container: LineContainer | undefined
-  // Pieces below this have been walked for openers to deactivate: one left active reaches closeLink, whose image and carry guards refuse a span going literal anyway.
+  // Pieces below this have been walked for openers to deactivate: an image close folds the link-marked piece into alt text, leaving this the only record that the brackets around it are doomed.
   deactivatedBefore: number
   definitions: LinkDefinitions
   openingSpellableLink: boolean

src/markdown/parse/markdown-to-adf.test.ts

@@ -849,7 +849,8 @@ test('keeps the carry and the image the brackets a nested link leaves literal ho
   assert.deepEqual(content(markdownToAdf(`[[<http://x/>](/c)${carried}](/w)\n`)), [
     { content: [text('[['), marked('http://x/', link('http://x/')), text('](/c)'), { type: 'placeholder' }, text('](/w)')], type: 'paragraph' },
   ])
-  assert.deepEqual(content(markdownToAdf('![![a [b](/c) ](/i)[![x](/y)[<http://x/>](/c)](/w)](/v)\n')), [image('/v', 'a b [x[http://x/](/c)](/w)')])
+  // The image close folds the link-marked piece into alt text, so only the deactivation still knows the enclosing bracket is doomed.
+  assert.deepEqual(content(markdownToAdf('![![a [b](/c) ](/i)[![[<http://x/>](/c)](/y)](/w)](/v)\n')), [image('/v', 'a b [[http://x/](/c)](/w)')])
 })
 
 test('reads the reference links a definition resolves, and leaves the rest literal', () => {