Define the writer panel, split the carry fence into its own changelog entry, and say how an adf: fence stays code

AGENTS.md

@@ -174,9 +174,9 @@ allow, rendered, shuffled, with no rationale and nothing saying what is implemen
 settle it; otherwise four more read, five of seven settle it, and less is a missing goal, asked.
 The verdict lands in `docs/decisions.md`.
 
-Every new or changed markdown or HTML spelling goes to such a panel, seated by the people who read
-and write that format (README `## Audience`); a question about what an app relies on seats the
-developer personas.
+A writer panel settles every new or changed markdown or HTML spelling: a reader panel whose readers
+are the people who read and write that format (README `## Audience`). A question about what an app
+relies on goes to the developer personas instead.
 
 ### Stated numbers
 

CHANGELOG.md

@@ -4,18 +4,21 @@
 
 - **Breaking:** directives, the inline opaque carry among them (now `!adf:carry{json="…"}`), are
   spelled under an `!adf:` prefix (`!adf:name … !adf:/name`, `!adf:name[content]{attrs}`,
-  `!adf:name arg {attrs}`) in place of the `:::`/`::`/`:name` forms, and the block carry is a code
-  fence whose info string `adf:<type>` names the node's type, its body the node's JSON without
-  `type`: text holding an unescaped `!adf:` and a code fence whose info string opens `adf:` are
-  claimed, and `adf` is an ordinary code block language. Convert stored markdown per `MIGRATION.md`.
+  `!adf:name arg {attrs}`) in place of the `:::`/`::`/`:name` forms: text holding an unescaped
+  `!adf:` is claimed, and `adf` is an ordinary code block language. Convert stored markdown per
+  `MIGRATION.md`.
+- **Breaking:** the block carry is a code fence whose info string `adf:<type>` names the node's
+  type, its body the node's JSON without `type`, and a code fence whose info string opens `adf:` is
+  claimed. Convert stored markdown per `MIGRATION.md`.
 - **Breaking:** `markdownToAdf` and `plainMarkdownToAdf` read markdown holding no block as a
   document whose `content` is empty, as Atlassian's schema requires; `!adf:doc {content=none}`
   spells a document holding no `content` key.
-- `markdownToAdf(adfToMarkdown(doc))` deep-equals `doc`: two adjacent text nodes a reader would
-  join are parted by `!adf:textBreak{}`, an empty `attrs`, `content` or `marks` is spelled
-  `{attrs=empty}`, `{content=empty}` or `{marks=empty}`, `-0` is spelled `-0`, and a `codeBlock`
-  of several text nodes is a fence per node. A `codeBlock` holding other than plain text nodes
-  rides the block carry, where it was refused.
+- `markdownToAdf(adfToMarkdown(doc))` deep-equals `doc` as JSON, for a document of plain objects as
+  `JSON.parse` builds them: two adjacent text nodes CommonMark would read back as one are parted by
+  `!adf:textBreak{}`, an empty `attrs`, `content` or `marks` is spelled `{attrs=empty}`,
+  `{content=empty}` or `{marks=empty}`, `-0` is spelled `-0`, and a `codeBlock` of several text
+  nodes is a fence per node. A `codeBlock` holding other than plain text nodes rides the block
+  carry, where it was refused.
 - **Breaking:** `unspellable-link` leaves `ConvertErrorCode`; a link whose `href` or `title` no
   CommonMark escape spells is written as `!adf:link[text]{attrs}`.
 - **Breaking:** some directive refusals carry `malformed-directive` where they carried

MIGRATION.md

@@ -5,9 +5,9 @@
 Directives moved under the `!adf:` prefix. `0.2.0` reads `0.1.0`'s spelling without an error,
 turning each directive into text and each carried node into an `adf` code block. Before `0.2.0`
 reads any `0.1.0` markdown, convert what is stored or in flight (an open editor, a queue) with the
-recipe below, and rewrite markdown your code writes or matches (templates, prompts, patterns) by
-the tables below. Stored ADF needs one change: a document `0.1.0` read from empty markdown holds
-no `content` key, and gets `content: []`, the empty document it meant.
+recipe below, and rewrite markdown your code writes or matches (templates, prompts, patterns) by the
+tables below. Stored ADF needs one change: give a document holding no `content` key `content: []`.
+`0.1.0` read empty markdown to that shape, meaning the empty document.
 
 ### Convert markdown
 
@@ -23,7 +23,7 @@ import { markdownToAdf as markdownToAdf010 } from 'adf-codec-0.1'
 
 function migrateMarkdown(stored: string) {
   const parsed = markdownToAdf010(stored)
-  // 0.1.0's reader was editor-normal, so a document with no content key always meant an empty one.
+  // 0.1.0 dropped an empty content array, so a document with no content key meant an empty one.
   return parsed.ok ? adfToMarkdown({ ...parsed.value, content: parsed.value.content ?? [] }) : parsed
 }
 ```

README.md

@@ -175,7 +175,7 @@ Parsing — `markdownToAdf` and `plainMarkdownToAdf`, and `htmlToAdf` at `0.2.0`
 
 | Code | Fires when | What you can do |
 | --- | --- | --- |
-| `malformed-directive` | an `!adf:` the grammar cannot read — a prefix completing no directive, an unclosed container, `[content]` or `{attrs}`, a closer with no container of its name open, a leaf given a body, `{attrs}` out of order or duplicated, invalid JSON in an opaque carry | write the spelling the message names, or keep it literal: escape the prefix — `\!adf:`, block and inline alike — or wrap a code fence whose info string opens `adf:` in `!adf:codeBlock {language="adf:…"}` with a bare fence |
+| `malformed-directive` | an `!adf:` the grammar cannot read — a prefix completing no directive, an unclosed container, `[content]` or `{attrs}`, a closer with no container of its name open, a leaf given a body, `{attrs}` out of order or duplicated, invalid JSON in an opaque carry | write the spelling the message names, or keep it literal: escape the prefix — `\!adf:`, block and inline alike — or, for a code fence whose info string opens `adf:`, drop the info string and wrap the fence in `!adf:codeBlock {language="adf:…"}` |
 | `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 input holds an HTML construct the documented element set does not map, a comment and a processing instruction among them — at this version that is every raw HTML construct in markdown, the element set landing at `0.2.0` | remove the construct, or write what it holds in the lossless flavour |
@@ -198,7 +198,7 @@ emit refuses:
 | `unspellable-line-start` | a paragraph line begins with a code span whose backticks would read back as a code fence | put any text before the code span |
 | `unspellable-whitespace` | an `emoji`, `mention` or `status` holds a newline in the text its inline directive spells in the content slot | replace it with a space — an inline directive never spans lines |
 | `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` | a node carries an attribute, value, argument or body its type does not take, or lacks one it needs — or markdown writes as a directive a node or mark the lossless flavour spells as CommonMark | write the shape the message names, or remove the reserved directive it names; `spec/flavour.md` lists every type's attributes and body |
+| `unsupported-node-shape` | a node carries an attribute, value, argument or body its type does not take, or lacks one it needs — or markdown writes as a directive a node or mark the lossless flavour spells as CommonMark, or a reserved directive (`!adf:textBreak{}`, `!adf:listBreak`, `!adf:doc`) stands where it parts nothing | make the edit the message opens with; `spec/flavour.md` lists every type's attributes and body |
 
 ## The guarantees
 
@@ -213,12 +213,13 @@ Serves Goals 1, 3 and 4.
   name every exception.
 - Plain CommonMark is valid input to `markdownToAdf` apart from the raw HTML `unmappable-html`
   names, with four carve-outs — literal text matching directive, pipe-table or strikethrough syntax,
-  and a code fence whose info string opens `adf:`, are claimed (escapable — `spec/flavour.md`) — and
-  one gap: a CommonMark image fits only as its own title-less paragraph; mid-text and titled images
-  are error results, save an image inside another's description, which flattens into the alt text.
-  Converting back yields the library's canonical spelling, which round-trips byte-identically —
-  where it converts back at all: a parse succeeding is no promise of that, so keep the source until
-  the way back succeeds. ``` ` `` ` ``` reads cleanly and then refuses.
+  and a code fence whose info string opens `adf:`, are claimed (each can be kept literal —
+  `spec/flavour.md`) — and one gap: a CommonMark image fits only as its own title-less paragraph;
+  mid-text and titled images are error results, save an image inside another's description, which
+  flattens into the alt text. Converting back yields the library's canonical spelling, which
+  round-trips byte-identically — where it converts back at all: a parse succeeding is no promise of
+  that, so keep the source until the way back succeeds. ``` ` `` ` ``` reads cleanly and then
+  refuses.
 - Four CommonMark spellings parse without an error and build a document the reference
   implementation renders differently: `[](/url)` and `[]()` stay literal text against CommonMark's
   empty link, a list continuing past a marker change stays one list against CommonMark's two, a

spec/flavour.md

@@ -4,7 +4,7 @@ The grammar of the extended markdown `adfToMarkdown` emits and `markdownToAdf` p
 CommonMark is a subset apart from raw HTML (below), with four carve-outs: literal text that matches
 directive syntax below or reads as a pipe table is claimed by the flavour, a matched `~~` pair
 spells `strike` (escape the `!adf:`, `|` or `~` to keep it literal), and a code fence whose info
-string opens `adf:` is the opaque carry (wrap it as a bare fence in
+string opens `adf:` is the opaque carry (drop the info string and wrap the fence in
 `!adf:codeBlock {language="adf:…"}` to keep it code) — and one gap: a CommonMark image fits only as
 its own title-less paragraph — mid-text and titled images are named errors. The emitted form is
 contract (`docs/decisions.md` §The formats are API). Per-node syntaxes build on this grammar in the