Record the chunk's reading cost and refresh item 92's figures

docs/reading-cost.md

@@ -215,3 +215,20 @@ Read most (opens and searches):
 - `src/markdown/commonmark/grammar.ts` 3
 - `src/markdown/directive-syntax.test.ts` 3
 - `src/markdown/portable/conventions.ts` 3
+
+## Reading cost, chunk b00b273b412e, finished 2026-10-11T09:45:23Z
+
+75569 new input tokens before the first commit.
+
+Read most (opens and searches):
+
+- `src/markdown/parse/blocks.ts` 8
+- `CHANGELOG.md` 6
+- `todo.md` 6
+- `README.md` 4
+- `corpus/commonmark-spec/exceptions.json` 3
+- `docs/decisions.md` 3
+- `src/markdown/parse/markdown-to-adf.test.ts` 3
+- `MIGRATION.md` 2
+- `AGENTS.md` 1
+- `ci.sh` 1

todo.md

@@ -122,11 +122,11 @@ commonmark.js avoids the backtick cost by caching backtick runs by length.
 ### 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
-them 68188. Read most over the last five, opens and searches: `docs/decisions.md` 28, `README.md`
-25, `todo.md` 21, `CHANGELOG.md` 15, `spec/flavour.md` 15,
-`src/markdown/portable/adf-to-portable-markdown.ts` 12, `src/markdown/parse/markdown-to-adf.test.ts`
-11, `MIGRATION.md` 9, `src/markdown/emit/line-escaping.ts` 9, `src/markdown/parse/inline-content.ts`
-8.
+them 97329. Read most over the last five, opens and searches: `docs/decisions.md` 28, `README.md`
+23, `todo.md` 23, `CHANGELOG.md` 19, `src/markdown/parse/blocks.ts` 15,
+`src/markdown/portable/adf-to-portable-markdown.ts` 12, `spec/flavour.md` 10,
+`src/markdown/emit/line-escaping.ts` 9, `src/markdown/parse/markdown-to-adf.test.ts` 8,
+`MIGRATION.md` 7.
 
 ### 33. Emit a line in time linear in its mark runs, in `adfToLosslessMarkdown` and `adfToPortableMarkdown`.