Answer stability round 2: the advice names the array limit, the guard's test names both, and the decision rewraps

CHANGELOG.md

@@ -87,8 +87,8 @@
   engine builds, on V8 about 537 million characters, or about 134 million in one text node:
   `adfToLosslessMarkdown` and `adfToPortableMarkdown` refuse it as `unsupported-node-shape`, where
   they threw.
-- Fix compact JSON in an `adf:` fence: `losslessMarkdownToAdf` refuses it as
-  `unsupported-node-shape`, where a megabyte of deeply nested JSON threw.
+- Fix deeply nested compact JSON in an `adf:` fence: `losslessMarkdownToAdf` refuses it as
+  `unsupported-node-shape`, like any compact JSON there, where a megabyte of it threw.
 - Add `adfToPortableMarkdown` and `portableMarkdownToAdf`, a lossy pair converting ADF to and from
   markdown GitHub, GitLab and Obsidian render: alerts, callouts, task lists, `==highlights==` and
   pipe tables. A task item keeps its paragraphs, then its nested task lists; the rest of the item,

README.md

@@ -442,7 +442,7 @@ The emitter raises these, and so does a parse, which asks the emitter how to spe
 | Code | Fires when | What you can do |
 | --- | --- | --- |
 | `unsupported-nesting-depth` | blocks, marks, an attribute's JSON or a carried node's JSON nest past 500 levels | keep the ADF and pass the document over, or show it read-only; flatten the input where you are the one who wrote it |
-| `unsupported-node-shape` | parsing, in `losslessMarkdownToAdf`: markdown spells a node with an attribute, value, argument or body its type does not take, or without one it needs, wraps a directive mark around nothing or only hard breaks, writes as a directive a node or mark the lossless flavour spells as CommonMark, or puts a reserved directive out of place: `!adf:textBreak{}` parting nothing, `!adf:doc` anywhere but as the whole document. Emitting, in `adfToLosslessMarkdown`: a node not riding the carry that carries one mark type twice, a block or a non-text inline node holding `text`, or a leaf block or a non-text inline node holding `content`. Emitting, in `adfToPortableMarkdown`: a line or task list the portable writer cannot spell, a bug in this library. Emitting, in both writers: a document whose markdown would be longer than the longest string or array the JavaScript engine builds — on V8, about 537 million characters of markdown, or about 134 million in one text node | fix what the message names; [`spec/flavour.md`](https://github.com/larvit/adf-codec/blob/main/spec/flavour.md) lists every type's attributes and body. For a portable line or task list, report it. Past the engine's longest string, keep the ADF and pass the document over, or show it read-only |
+| `unsupported-node-shape` | parsing, in `losslessMarkdownToAdf`: markdown spells a node with an attribute, value, argument or body its type does not take, or without one it needs, wraps a directive mark around nothing or only hard breaks, writes as a directive a node or mark the lossless flavour spells as CommonMark, or puts a reserved directive out of place: `!adf:textBreak{}` parting nothing, `!adf:doc` anywhere but as the whole document. Emitting, in `adfToLosslessMarkdown`: a node not riding the carry that carries one mark type twice, a block or a non-text inline node holding `text`, or a leaf block or a non-text inline node holding `content`. Emitting, in `adfToPortableMarkdown`: a line or task list the portable writer cannot spell, a bug in this library. Emitting, in both writers: a document whose markdown would be longer than the longest string or array the JavaScript engine builds — on V8, about 537 million characters of markdown, or about 134 million in one text node | fix what the message names; [`spec/flavour.md`](https://github.com/larvit/adf-codec/blob/main/spec/flavour.md) lists every type's attributes and body. For a portable line or task list, report it. Past the engine's longest string or array, keep the ADF and pass the document over, or show it read-only |
 
 ## The guarantees
 

docs/decisions.md

@@ -462,10 +462,10 @@ handles one cause alike whichever node, attribute or direction raised it.
 - A non-finite number takes two codes: `unsupported-node-shape` parsing, `not-an-adf-document`
   emitting — no document holds one, so no round-trip crosses them (2026-09-23).
 - A document whose markdown would be longer than the longest string or array the JavaScript engine
-  builds is `unsupported-node-shape` at the document's path, in either writer: the document does not
-  convert, and the bound is the engine's own. A carried node reaches it on about 1 MB of deeply nested JSON,
-  since the block carry indents two spaces a level; `todo.md` item 107 spells it in a length linear
-  in its JSON (2026-10-11).
+  builds is `unsupported-node-shape` at the document's path, in either writer: the document does
+  not convert, and the bound is the engine's own. A carried node reaches it on about 1 MB of
+  deeply nested JSON, since the block carry indents two spaces a level; `todo.md` item 107 spells
+  it in a length linear in its JSON (2026-10-11).
 - The markdown readers and `htmlToAdf` refuse a value that is not a string as `not-a-string`, at
   position `{ line: 1, offset: 0 }` with an empty path: no existing code reads true of it, and
   `not-an-adf-document` names the emitters' input (2026-10-05).

src/result.test.ts

@@ -36,7 +36,7 @@ test('every ConvertErrorCode is the code of a production call site, and every ca
   assert.deepEqual(calledCodes(), declaredCodes())
 })
 
-test('refuses where SpiderMonkey runs out of string, and lets a stack overflow or any other throw through', () => {
+test('refuses where the engine runs out of string or array, and lets a stack overflow or any other throw through', () => {
   const overflow = new Error('allocation size overflow')
   overflow.name = 'InternalError'
   assert.deepEqual(