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

docs/reading-cost.md

@@ -232,3 +232,20 @@ Read most (opens and searches):
 - `MIGRATION.md` 2
 - `AGENTS.md` 1
 - `ci.sh` 1
+
+## Reading cost, chunk 8a2f6cd68381, finished 2026-10-11T10:14:12Z
+
+96564 new input tokens before the first commit.
+
+Read most (opens and searches):
+
+- `README.md` 6
+- `src/markdown/parse/portable-markdown-to-adf.test.ts` 5
+- `todo.md` 4
+- `src/markdown/parse/markdown-to-adf.ts` 3
+- `CHANGELOG.md` 2
+- `src/markdown/portable/task-list.ts` 2
+- `src/result.ts` 2
+- `ci.sh` 1
+- `docker-runner.sh` 1
+- `docs/decisions.md` 1

todo.md

@@ -109,10 +109,10 @@ commonmark.js avoids the backtick cost by caching backtick runs by length.
 
 The last five chunks' median is 168135 new input tokens before their first commit, the five before
 them 97329. Files read most over the last five chunks, counting opens and searches: `docs/decisions.md` 28, `README.md`
-23, `todo.md` 23, `CHANGELOG.md` 19, `src/markdown/parse/blocks.ts` 15,
+27, `todo.md` 26, `CHANGELOG.md` 20, `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.
+`src/markdown/parse/portable-markdown-to-adf.test.ts` 10, `src/markdown/emit/line-escaping.ts` 9,
+`src/markdown/parse/markdown-to-adf.test.ts` 8.
 
 ### 33. Emit a line in time linear in its mark runs, in `adfToLosslessMarkdown` and `adfToPortableMarkdown`.