Record the reading cost

docs/reading-cost.md

@@ -368,3 +368,20 @@ Read most (opens and searches):
 - `src/conformance/adf-schema.test.ts` 3
 - `src/markdown/parse/inline-content.ts` 3
 - `corpus/round-trip/combinations/link-definition-directive.md` 2
+
+## Reading cost, chunk f98651837536, finished 2026-10-14T18:16:11Z
+
+159948 new input tokens before the first commit.
+
+Read most (opens and searches):
+
+- `todo.md` 9
+- `README.md` 6
+- `CHANGELOG.md` 2
+- `docs/decisions.md` 2
+- `AGENTS.md` 1
+- `converter-comparison/compare.mjs` 1
+- `converter-comparison/run.sh` 1
+- `docker-runner.sh` 1
+- `package.json` 1
+- `tsconfig.build.json` 1

todo.md

@@ -132,12 +132,12 @@ 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 97329. Files read most over the last five chunks, counting opens and searches:
-`docs/decisions.md` 28, `README.md` 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/parse/portable-markdown-to-adf.test.ts` 10, `src/markdown/emit/line-escaping.ts` 9,
-`src/markdown/parse/markdown-to-adf.test.ts` 8.
+The last five chunks' median is 104037 new input tokens before their first commit, the five before
+them 96564. Files read most over the last five chunks, counting opens and searches: `README.md` 35,
+`todo.md` 35, `spec/flavour.md` 24, `docs/decisions.md` 23, `CHANGELOG.md` 14,
+`src/markdown/emit/adf-to-markdown.test.ts` 14, `src/markdown/parse/markdown-to-adf.test.ts` 14,
+`src/markdown/directive-syntax.ts` 10, `src/conformance/adf-schema.test.ts` 8,
+`src/conformance/property-harness.ts` 6.
 
 ### 33. Emit a line in time linear in its mark runs, in `adfToLosslessMarkdown` and `adfToPortableMarkdown`.