From ead065b1e1cb85270fd171e80c98d8956a4a42e2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 2 Jul 2026 00:40:57 +0000
Subject: [PATCH 1/4] Initial plan


From e92bf8fce3a6b0647877bcee9d50740ed531f841 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 2 Jul 2026 00:43:24 +0000
Subject: [PATCH 2/4] Add failing transform regression test

---
 tests/parser.test.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/tests/parser.test.js b/tests/parser.test.js
index 1b2c2fd..b788f67 100644
--- a/tests/parser.test.js
+++ b/tests/parser.test.js
@@ -1,7 +1,7 @@
 import { beforeAll, describe, expect, it } from 'vitest';
 import { parseForESLint } from '../src/parser/gjs-gts-parser.js';
 import { replaceExtensions } from '../src/parser/ts-patch.js';
-import { traverse } from '../src/parser/transforms.js';
+import { transformForLint, traverse } from '../src/parser/transforms.js';
 import { SourceCode } from 'eslint';
 import { visitorKeys as tsVisitors } from '@typescript-eslint/visitor-keys';
 import { visitorKeys as glimmerVisitorKeys } from '@glimmer/syntax';
@@ -2384,6 +2384,21 @@ export const NotFound = <template>
     }
   });
 
+  it('transforms class templates with backtick-only comments for linting', () => {
+    const code = [
+      "import Component from '@glimmer/component';",
+      '',
+      'export default class MyComponent extends Component {',
+      '  <template>',
+      '    {{!  `asd` `qwe` `zxc` `undefined` `asd` }}',
+      '    {{! `@foo` }}',
+      '  </template>',
+      '}',
+    ].join('\n');
+
+    expect(() => transformForLint(code, 'example.gts')).not.toThrow();
+  });
+
   it('svg elements are not added to global scope', () => {
     result = parseForESLint(
       `<template>

From 1e7c57248595c11dacb56c55f918ed214e9ec949 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 2 Jul 2026 02:01:41 +0000
Subject: [PATCH 3/4] Fix lint transform for backtick template comments

---
 src/parser/transforms.js | 2 +-
 tests/parser.test.js     | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/parser/transforms.js b/src/parser/transforms.js
index 0e3b6d1..6836a8e 100644
--- a/src/parser/transforms.js
+++ b/src/parser/transforms.js
@@ -332,7 +332,7 @@ export function transformForLint(code, fileName) {
   // Build placeholder JS inline (same format as ember-estree's toPlaceholderJS)
   let jsCode = code;
   for (const tplInfo of [...result].reverse()) {
-    const content = tplInfo.contents.replace(/`/g, '\\`').replace(/\$/g, '\\$');
+    const content = tplInfo.contents.replace(/[^\r\n]/g, ' ');
     const start = tplInfo.range.startUtf16Codepoint;
     const end = tplInfo.range.endUtf16Codepoint;
     const tplLength = end - start;
diff --git a/tests/parser.test.js b/tests/parser.test.js
index b788f67..9f9523e 100644
--- a/tests/parser.test.js
+++ b/tests/parser.test.js
@@ -2396,7 +2396,9 @@ export const NotFound = <template>
       '}',
     ].join('\n');
 
-    expect(() => transformForLint(code, 'example.gts')).not.toThrow();
+    const { output } = transformForLint(code, 'example.gts');
+
+    expect(output).toHaveLength(code.length);
   });
 
   it('svg elements are not added to global scope', () => {

From f864056ccaa209f8ff5cb267cc30c0f7a0f9983e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 2 Jul 2026 02:37:50 +0000
Subject: [PATCH 4/4] Clarify lint template masking

---
 src/parser/transforms.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/parser/transforms.js b/src/parser/transforms.js
index 6836a8e..cf52e51 100644
--- a/src/parser/transforms.js
+++ b/src/parser/transforms.js
@@ -278,6 +278,11 @@ export const replaceRange = function replaceRange(s, start, end, substitute) {
   return s.slice(0, start) + substitute + s.slice(end);
 };
 
+function maskTemplateContentForLint(content) {
+  // Preserve line endings and UTF-16 length, but remove template syntax from the JS placeholder.
+  return content.replace(/[^\r\n]/g, ' ');
+}
+
 const processor = new Preprocessor();
 
 class EmberParserError extends Error {
@@ -332,7 +337,7 @@ export function transformForLint(code, fileName) {
   // Build placeholder JS inline (same format as ember-estree's toPlaceholderJS)
   let jsCode = code;
   for (const tplInfo of [...result].reverse()) {
-    const content = tplInfo.contents.replace(/[^\r\n]/g, ' ');
+    const content = maskTemplateContentForLint(tplInfo.contents);
     const start = tplInfo.range.startUtf16Codepoint;
     const end = tplInfo.range.endUtf16Codepoint;
     const tplLength = end - start;