Record the marks and colwidth spellings in the spec, decisions, changelog and migration guide

AGENTS.md

@@ -16,6 +16,7 @@ In `docs/decisions.md`:
 - A list right after one of its kind takes the other marker
 - An empty key spells `empty`
 - `-0` is spelled `-0`
+- A block's marks are named, and `colwidth` is a comma list
 - Empty markdown is a document of no blocks
 - Unknown nodes ride the carry
 - The carry fence names the node type

CHANGELOG.md

@@ -66,6 +66,10 @@
 - **Breaking:** `adfToLosslessMarkdown` writes a centered, uncaptioned external image whose one
   mark is a link holding only `href` and `title` as `[![alt](url)](href "title")`, where it wrote the
   `mediaSingle` directive. Convert stored markdown per `MIGRATION.md`.
+- **Breaking:** `colwidth` is spelled as its widths joined by commas, `colwidth="340,420"`, where it
+  was a JSON array, and a block's `marks` names each mark with its attributes,
+  `marks="breakout{mode=wide}"`, where it was a JSON array. The JSON array stays only for a block
+  mark the flavour does not list. 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.

MIGRATION.md

@@ -67,6 +67,8 @@ function migrateMarkdown(stored: string) {
 | `\:` keeps a directive literal | `\!adf:` keeps a directive literal |
 | `:adf{json="…"}` carrying a link for its `collection`, `id` or `occurrenceKey` | `!adf:link[text]{attrs}` |
 | `::listBreak` between two lists of a kind | no separator: adjacent lists of a kind alternate `- ` and `* `, or `1.` and `1)` |
+| `colwidth="[340,420]"` | `colwidth="340,420"` |
+| `marks="[{\"attrs\":{\"mode\":\"wide\"},\"type\":\"breakout\"}]"` on a block | `marks="breakout{mode=wide}"`; the JSON array stays for a mark the flavour does not list |
 
 A colon run and `:name[` are plain text now, and `adf` an ordinary code block language; text
 holding an unescaped `!adf:` and a code fence whose info string opens `adf:` are claimed instead.

docs/decisions.md

@@ -100,6 +100,20 @@ holding no `content` key. A writer panel chose the spelling, 5 of 7. The grammar
 `-0` is spelled `-0` wherever the flavour writes a number or a JSON value, since JSON's grammar
 reads it back as `-0`. The grammar: `spec/flavour.md` §Block nodes and §The CommonMark blocks.
 
+## A block's marks are named, and `colwidth` is a comma list
+
+2026-10-03 for `colwidth`, 5 of 7, and 2026-10-14 for `marks`, 3 of 3: writer panels of product
+managers, engineers and support agents. Goal 6. Valid while ADF types these attributes as
+`src/adf/` does.
+
+`colwidth` is its widths joined by commas, `colwidth="340,420"`, where it was a JSON array. A
+block's `marks` names each mark with its `{attrs}`, in order,
+`marks="indentation{level=2} fragment{localId=f1 name=\"Price list\"}"`, chosen over the escaped
+JSON array and an unquoted one. All three writers first sketched a key per mark, `{align=center}`,
+which loses the marks' order and can clash with the node's own attributes. A mark `src/adf/` does not
+type keeps the whole array as JSON, the general form (§Readable spellings take the `try` prefix).
+The grammar: `spec/flavour.md` §Block nodes.
+
 ## Empty markdown is a document of no blocks
 
 2026-10-03, a writer panel and the maintainer. Goals 1 and 6. Valid while ADF's schema requires

todo.md

@@ -25,8 +25,6 @@
 
 | ID | Release | Exempt | Item | R | S | C | A | G | Goals | Score |
 |---|---|---|---|---|---|---|---|---|---|---|
-| 52 | 0.2.0 |  | **Spell `colwidth` as a comma list, `colwidth="340,420"`.** | 3 | 3 | 3 | 5 | 6 | 6 | 11.5 |
-| 53 | 0.2.0 |  | **Put a block's `marks` spelling to the writer panel and adopt its pick.** | 4 | 5 | 4 | 5 | 6 | 6 | 10.0 |
 | 111 | 0.2.1 |  | **Split README's `unsupported-node-shape` error-table row into one bullet per cause group, each carrying its remedy.** | 2 | 2 | 1 | 5 | 5 | 3 | 15.3 |
 | 89 | 0.2.1 |  | **Build a `date`, `emoji`, `inlineCard`, `mention` or `status` holding no mark Atlassian's schema withholds from it, in every reader.** | 4 | 4 | 4 | 5 | 6 | 4 | 13.0 |
 | 99 | 0.2.1 | defect | **Write a linked external image standing inline or in a table cell in the spelling a reader panel picks, in `adfToPortableMarkdown`.** | 3 | 3 | 5 | 6 | 7 | 7 | 12.9 |
@@ -73,17 +71,6 @@
 
 ## Details
 
-### 52. Spell `colwidth` as a comma list, `colwidth="340,420"`.
-
-A writer panel chose it on 2026-10-03, 5 of 7, over today's `colwidth="[340,420]"`. Breaking:
-`MIGRATION.md`'s Spellings table gains its row.
-
-### 53. Put a block's `marks` spelling to the writer panel and adopt its pick.
-
-Today `marks="[{\"attrs\":{\"mode\":\"wide\"},\"type\":\"breakout\"}]"`, the marks array as
-escaped JSON. Breaking where the panel picks another spelling: `MIGRATION.md`'s Spellings table
-gains its row.
-
 ### 111. Split README's `unsupported-node-shape` error-table row into one bullet per cause group, each carrying its remedy.
 
 The row's "Fires when" cell holds about a dozen causes in four groups (parsing, each writer, both