diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b4718f69b23b4..82e4a6aaf82eb4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,6 +107,13 @@ jobs:
           node-version: 22.x
           cache: npm
 
+      - name: Check for CRLF line endings
+        run: |
+          if git grep -Il $'\r'; then
+            echo "::error::CRLF line endings detected. Configure your editor to use LF line endings (this repo has an .editorconfig file that most editors respect automatically)."
+            exit 1
+          fi
+
       - run: |
           FILES=$(
             find src/content \
diff --git a/.husky/pre-commit b/.husky/pre-commit
new file mode 100755
index 00000000000000..df6b0c4a5dc257
--- /dev/null
+++ b/.husky/pre-commit
@@ -0,0 +1,32 @@
+#!/bin/sh
+# Convert CRLF to LF in all staged files before committing.
+# This guards against AI tooling and Windows environments introducing CRLF.
+
+STAGED=$(git diff --cached --name-only)
+
+if [ -z "$STAGED" ]; then
+  exit 0
+fi
+
+FIXED=0
+
+while IFS= read -r file; do
+  # Skip files that no longer exist on disk (e.g. deleted files)
+  if [ ! -f "$file" ]; then
+    continue
+  fi
+
+  # Check for carriage returns
+  if grep -qU $'\r' "$file"; then
+    # perl -pi works cross-platform (macOS BSD and Linux GNU)
+    perl -pi -e 's/\r\n/\n/g; s/\r/\n/g' "$file"
+    FIXED=1
+  fi
+done << EOF
+$STAGED
+EOF
+
+if [ "$FIXED" = "1" ]; then
+  echo "pre-commit: CRLF line endings converted to LF in staged files."
+  git add --update
+fi
diff --git a/package-lock.json b/package-lock.json
index 5467c582187ce0..05fa72b86e0b6b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -62,6 +62,7 @@
 				"hast-util-select": "6.0.4",
 				"hastscript": "9.0.1",
 				"he": "1.2.0",
+				"husky": "9.1.7",
 				"jsonc-parser": "3.3.1",
 				"ldrs": "1.1.7",
 				"lz-string": "1.5.0",
@@ -12083,6 +12084,22 @@
 			"dev": true,
 			"license": "BSD-2-Clause"
 		},
+		"node_modules/husky": {
+			"version": "9.1.7",
+			"resolved": "https://registry.npmjs.org/husky/-/husky-9.1.7.tgz",
+			"integrity": "sha512-5gs5ytaNjBrh5Ow3zrvdUUY+0VxIuWVL4i9irt6friV+BqdCfmV11CQTWMiBYWHbXhco+J1kHfTOUkePhCDvMA==",
+			"dev": true,
+			"license": "MIT",
+			"bin": {
+				"husky": "bin.js"
+			},
+			"engines": {
+				"node": ">=18"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/typicode"
+			}
+		},
 		"node_modules/i18next": {
 			"version": "23.16.8",
 			"resolved": "https://registry.npmjs.org/i18next/-/i18next-23.16.8.tgz",
diff --git a/package.json b/package.json
index 5151febf72e40b..df570841140c3b 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,8 @@
 		"ai-setup:import-from-opencode": "npx rulesync import --targets opencode --features rules,commands,subagents",
 		"ai-setup:claudecode": "npm run ai-setup:import-from-opencode && npx rulesync generate --targets claudecode --features rules,commands,subagents",
 		"ai-setup:cursor": "npm run ai-setup:import-from-opencode && npx rulesync generate --targets cursor --features commands,subagents",
-		"ai-setup:copilot": "npm run ai-setup:import-from-opencode && npx rulesync generate --targets copilot --features commands,subagents"
+		"ai-setup:copilot": "npm run ai-setup:import-from-opencode && npx rulesync generate --targets copilot --features commands,subagents",
+		"prepare": "husky"
 	},
 	"devDependencies": {
 		"@actions/core": "1.11.1",
@@ -86,6 +87,7 @@
 		"hast-util-select": "6.0.4",
 		"hastscript": "9.0.1",
 		"he": "1.2.0",
+		"husky": "9.1.7",
 		"jsonc-parser": "3.3.1",
 		"ldrs": "1.1.7",
 		"lz-string": "1.5.0",