diff --git a/dev/index.d.ts b/dev/index.d.ts
index 3811272..36f53b5 100644
--- a/dev/index.d.ts
+++ b/dev/index.d.ts
@@ -1,11 +1,20 @@
 export {gfmAutolinkLiteral} from './lib/syntax.js'
 export {gfmAutolinkLiteralHtml} from './lib/html.js'
 
+/**
+ * Augment types.
+ */
 declare module 'micromark-util-types' {
+  /**
+   * Augment token with a field to improve performance.
+   */
   interface Token {
     _gfmAutolinkLiteralWalkedInto?: boolean
   }
 
+  /**
+   * Token types.
+   */
   interface TokenTypeMap {
     literalAutolink: 'literalAutolink'
     literalAutolinkEmail: 'literalAutolinkEmail'
diff --git a/dev/lib/html.js b/dev/lib/html.js
index f41fa43..7b8145b 100644
--- a/dev/lib/html.js
+++ b/dev/lib/html.js
@@ -1,8 +1,5 @@
 /**
- * @typedef {import('micromark-util-types').CompileContext} CompileContext
- * @typedef {import('micromark-util-types').Handle} Handle
- * @typedef {import('micromark-util-types').HtmlExtension} HtmlExtension
- * @typedef {import('micromark-util-types').Token} Token
+ * @import {CompileContext, Handle, HtmlExtension, Token} from 'micromark-util-types'
  */
 
 import {sanitizeUri} from 'micromark-util-sanitize-uri'
diff --git a/dev/lib/syntax.js b/dev/lib/syntax.js
index 9bded4b..904e272 100644
--- a/dev/lib/syntax.js
+++ b/dev/lib/syntax.js
@@ -1,12 +1,5 @@
 /**
- * @typedef {import('micromark-util-types').Code} Code
- * @typedef {import('micromark-util-types').ConstructRecord} ConstructRecord
- * @typedef {import('micromark-util-types').Event} Event
- * @typedef {import('micromark-util-types').Extension} Extension
- * @typedef {import('micromark-util-types').Previous} Previous
- * @typedef {import('micromark-util-types').State} State
- * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
- * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
+ * @import {Code, ConstructRecord, Event, Extension, Previous, State, TokenizeContext, Tokenizer} from 'micromark-util-types'
  */
 
 import {
diff --git a/test/index.js b/test/index.js
index ca40529..ce81dd2 100644
--- a/test/index.js
+++ b/test/index.js
@@ -20,7 +20,7 @@ test('micromark-extension-gfm-autolink-literal', async function (t) {
   })
 
   await t.test(
-    'should skip wwwAutolink construct if `disable.null` includes `wwwAutolink`',
+    'should skip `wwwAutolink` construct if `disable.null` includes `wwwAutolink`',
     async function () {
       assert.equal(
         micromark('www.a.com', {
@@ -36,7 +36,7 @@ test('micromark-extension-gfm-autolink-literal', async function (t) {
   )
 
   await t.test(
-    'should skip protocolAutolink construct if `disable.null` includes `protocolAutolink`',
+    'should skip `protocolAutolink` construct if `disable.null` includes `protocolAutolink`',
     async function () {
       assert.equal(
         micromark('http://a.com', {
@@ -52,7 +52,7 @@ test('micromark-extension-gfm-autolink-literal', async function (t) {
   )
 
   await t.test(
-    'should skip emailAutolink construct if `disable.null` includes `emailAutolink`',
+    'should skip `emailAutolink` construct if `disable.null` includes `emailAutolink`',
     async function () {
       assert.equal(
         micromark('a@b.com', {