From 77bdb1d724cd1646213f7e8d001d396c64b8b94f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 3 Sep 2026 00:56:59 +0000
Subject: [PATCH 1/3] Initial plan


From 9aa7234395936c85016b1241eb97c1ea7899582f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 3 Sep 2026 01:00:15 +0000
Subject: [PATCH 2/3] Fix AST JSDoc scan range handling

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>
---
 packages/typescript/src/ast/scanner.ts   |  2 +-
 packages/typescript/test/scanner.test.ts | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 packages/typescript/test/scanner.test.ts

diff --git a/packages/typescript/src/ast/scanner.ts b/packages/typescript/src/ast/scanner.ts
index 8e956bb967f54..df3a7415cec5d 100644
--- a/packages/typescript/src/ast/scanner.ts
+++ b/packages/typescript/src/ast/scanner.ts
@@ -2434,7 +2434,7 @@ export function createScanner(
 
         if (isIdentifierStart(ch)) {
             let char = ch;
-            while (pos < end && isIdentifierPart(char = codePointUnchecked(pos)) || char === CharacterCodes.minus) pos += charSize(char);
+            while (pos < end && (isIdentifierPart(char = codePointUnchecked(pos)) || char === CharacterCodes.minus)) pos += charSize(char);
             tokenValue = text.substring(tokenStart, pos);
             if (char === CharacterCodes.backslash) {
                 tokenValue += scanIdentifierParts();
diff --git a/packages/typescript/test/scanner.test.ts b/packages/typescript/test/scanner.test.ts
new file mode 100644
index 0000000000000..4d9cbfb70c0a9
--- /dev/null
+++ b/packages/typescript/test/scanner.test.ts
@@ -0,0 +1,23 @@
+import {
+    createScanner,
+    SyntaxKind,
+} from "@typescript/typescript/unstable/ast";
+import assert from "node:assert";
+import { test } from "node:test";
+
+test("scanJsDocToken respects a range ending in a hyphen", () => {
+    const text = "/** x-yy";
+    const scanner = createScanner(/*skipTrivia*/ true);
+    scanner.setText(text);
+
+    scanner.scanRange(3, text.length - 5, () => {
+        const tokens = [];
+        while (scanner.scanJsDocToken() !== SyntaxKind.EndOfFile) {
+            tokens.push([scanner.getToken(), scanner.getTokenText()]);
+        }
+        assert.deepStrictEqual(tokens, [
+            [SyntaxKind.WhitespaceTrivia, " "],
+            [SyntaxKind.Identifier, "x-"],
+        ]);
+    });
+});

From cba9b6bd4ede4a6fd8330bf4c8dc69c7af7d09dc Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 3 Sep 2026 01:14:54 +0000
Subject: [PATCH 3/3] Format AST scanner regression test

Co-authored-by: jakebailey <5341706+jakebailey@users.noreply.github.com>
---
 packages/typescript/test/scanner.test.ts | 46 ++++++++++++------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/packages/typescript/test/scanner.test.ts b/packages/typescript/test/scanner.test.ts
index 4d9cbfb70c0a9..0f52a34040628 100644
--- a/packages/typescript/test/scanner.test.ts
+++ b/packages/typescript/test/scanner.test.ts
@@ -1,23 +1,23 @@
-import {
-    createScanner,
-    SyntaxKind,
-} from "@typescript/typescript/unstable/ast";
-import assert from "node:assert";
-import { test } from "node:test";
-
-test("scanJsDocToken respects a range ending in a hyphen", () => {
-    const text = "/** x-yy";
-    const scanner = createScanner(/*skipTrivia*/ true);
-    scanner.setText(text);
-
-    scanner.scanRange(3, text.length - 5, () => {
-        const tokens = [];
-        while (scanner.scanJsDocToken() !== SyntaxKind.EndOfFile) {
-            tokens.push([scanner.getToken(), scanner.getTokenText()]);
-        }
-        assert.deepStrictEqual(tokens, [
-            [SyntaxKind.WhitespaceTrivia, " "],
-            [SyntaxKind.Identifier, "x-"],
-        ]);
-    });
-});
+import {
+    createScanner,
+    SyntaxKind,
+} from "@typescript/typescript/unstable/ast";
+import assert from "node:assert";
+import { test } from "node:test";
+
+test("scanJsDocToken respects a range ending in a hyphen", () => {
+    const text = "/** x-yy";
+    const scanner = createScanner(/*skipTrivia*/ true);
+    scanner.setText(text);
+
+    scanner.scanRange(3, text.length - 5, () => {
+        const tokens = [];
+        while (scanner.scanJsDocToken() !== SyntaxKind.EndOfFile) {
+            tokens.push([scanner.getToken(), scanner.getTokenText()]);
+        }
+        assert.deepStrictEqual(tokens, [
+            [SyntaxKind.WhitespaceTrivia, " "],
+            [SyntaxKind.Identifier, "x-"],
+        ]);
+    });
+});