Use @types/nlcst

index.js

@@ -1,6 +1,9 @@
 /**
- * @typedef {import('unist').Node} Node
- * @typedef {import('unist').Parent} Parent
+ * @typedef {import('unist').Parent} UnistParent
+ * @typedef {import('nlcst').Root} Root
+ * @typedef {import('nlcst').Content} Content
+ * @typedef {Root|Content} Node
+ * @typedef {Extract<Node, UnistParent>} Parent
  */
 
 import nodeAssert from 'node:assert'
@@ -92,7 +95,7 @@ function assertParent(node) {
 /**
  * @param {unknown} node
  * @param {Parent} [ancestor]
- * @returns {asserts node is Parent}
+ * @returns {asserts node is Root}
  */
 function RootNode(node, ancestor) {
   parent(node)

index.test-d.ts

@@ -1,9 +1,13 @@
 import {expectType, expectNotType} from 'tsd'
-import {Node, Parent} from 'unist'
+import type {Parent as UnistParent} from 'unist'
+import type {Root, Content} from 'nlcst'
 import {assert, parent} from './index.js'
 
+type Node = Root | Content
+type Parent = Extract<Node, UnistParent>
+
 const emptyNode = {type: 'a'}
-const literalNode = {type: 'b', value: 'c'}
+const literalNode = {type: 'TextNode', value: 'c'}
 const parentNode = {type: 'd', children: [emptyNode, literalNode]}
 
 expectNotType<Node>(emptyNode)

package.json

@@ -32,6 +32,7 @@
     "index.js"
   ],
   "dependencies": {
+    "@types/nlcst": "^1.0.0",
     "@types/unist": "^2.0.0",
     "mapz": "^2.0.0",
     "unist-util-assert": "^3.0.0",