BREAKING: add specific node types instead of only 1 global CssNode

.gitignore

@@ -1,6 +1,7 @@
 *.md
 !API.md
 !README.md
+!MIGRATION-TYPED-NODES.md
 dist
 coverage
 .claude/settings.local.json

package.json

@@ -38,6 +38,10 @@
 		"./parse-anplusb": {
 			"types": "./dist/parse-anplusb.d.ts",
 			"import": "./dist/parse-anplusb.js"
+		},
+		"./nodes": {
+			"types": "./dist/nodes/index.d.ts",
+			"import": "./dist/nodes/index.js"
 		}
 	},
 	"files": [

src/anplusb-parser.test.ts

@@ -1,16 +1,16 @@
 import { describe, it, expect } from 'vitest'
 import { ANplusBParser } from './anplusb-parser'
 import { CSSDataArena, NODE_SELECTOR_NTH } from './arena'
-import { CSSNode } from './css-node'
+import { CSSNode, SelectorNthNode } from './css-node'
 
 // Helper to parse An+B expression
-function parse_anplusb(expr: string): CSSNode | null {
+function parse_anplusb(expr: string): SelectorNthNode | null {
 	const arena = new CSSDataArena(64)
 	const parser = new ANplusBParser(arena, expr)
 	const nodeIndex = parser.parse_anplusb(0, expr.length)
 
 	if (nodeIndex === null) return null
-	return new CSSNode(arena, expr, nodeIndex)
+	return CSSNode.from(arena, expr, nodeIndex) as SelectorNthNode
 }
 
 describe('ANplusBParser', () => {