Convert markdownlint library to an ECMAScript module, replace markdownlint-micromark with micromark, stop publishing (large) markdownlint-browser.js, see https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c for guidance.

lib/md032.mjs

@@ -0,0 +1,75 @@
+// @ts-check
+
+import { addErrorContext, isBlankLine } from "../helpers/helpers.cjs";
+import { filterByPredicate, getBlockQuotePrefixText, nonContentTokens } from "../helpers/micromark-helpers.cjs";
+import { filterByTypesCached } from "./cache.mjs";
+
+const isList = (token) => (
+  (token.type === "listOrdered") || (token.type === "listUnordered")
+);
+
+/** @type {import("./markdownlint.mjs").Rule} */
+export default {
+  "names": [ "MD032", "blanks-around-lists" ],
+  "description": "Lists should be surrounded by blank lines",
+  "tags": [ "bullet", "ul", "ol", "blank_lines" ],
+  "parser": "micromark",
+  "function": function MD032(params, onError) {
+    const { lines, parsers } = params;
+    const blockQuotePrefixes = filterByTypesCached([ "blockQuotePrefix", "linePrefix" ]);
+
+    // For every top-level list...
+    const topLevelLists = filterByPredicate(
+      parsers.micromark.tokens,
+      isList,
+      (token) => (
+        (isList(token) || (token.type === "htmlFlow")) ? [] : token.children
+      )
+    );
+    for (const list of topLevelLists) {
+
+      // Look for a blank line above the list
+      const firstLineNumber = list.startLine;
+      if (!isBlankLine(lines[firstLineNumber - 2])) {
+        addErrorContext(
+          onError,
+          firstLineNumber,
+          lines[firstLineNumber - 1].trim(),
+          undefined,
+          undefined,
+          undefined,
+          {
+            "insertText": getBlockQuotePrefixText(blockQuotePrefixes, firstLineNumber)
+          }
+        );
+      }
+
+      // Find the "visual" end of the list
+      let endLine = list.endLine;
+      const flattenedChildren = filterByPredicate(list.children);
+      for (const child of flattenedChildren.reverse()) {
+        if (!nonContentTokens.has(child.type)) {
+          endLine = child.endLine;
+          break;
+        }
+      }
+
+      // Look for a blank line below the list
+      const lastLineNumber = endLine;
+      if (!isBlankLine(lines[lastLineNumber])) {
+        addErrorContext(
+          onError,
+          lastLineNumber,
+          lines[lastLineNumber - 1].trim(),
+          undefined,
+          undefined,
+          undefined,
+          {
+            "lineNumber": lastLineNumber + 1,
+            "insertText": getBlockQuotePrefixText(blockQuotePrefixes, lastLineNumber)
+          }
+        );
+      }
+    }
+  }
+};