diff --git a/test/harness/package-lock.json b/test/harness/package-lock.json
index 82814f3280..cb4ce8424b 100644
--- a/test/harness/package-lock.json
+++ b/test/harness/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
-        "@github/copilot": "^0.0.383",
+        "@github/copilot": "^1.0.43",
         "@types/node": "^25.0.3",
         "openai": "^6.15.0",
         "tsx": "^4.21.0",
@@ -461,30 +461,27 @@
       }
     },
     "node_modules/@github/copilot": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot/-/copilot-0.0.383.tgz",
-      "integrity": "sha512-bE81nL/1YTppMS6gB/Nq7S+5EcD45awvrYgSkhLZKBuWhwOQ42jDp0g2lID1nR4GrwatV+FoDckQw2NpDPY93A==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot/-/copilot-1.0.43.tgz",
+      "integrity": "sha512-2FO825Aq4bwmHcXVyplW+CpZaJFUYjqtqjBGnueM31gu4ufn6ReurzB2swBQ6bn4Pquyy2KeodMRPpT6JaLMhw==",
       "dev": true,
       "license": "SEE LICENSE IN LICENSE.md",
       "bin": {
         "copilot": "npm-loader.js"
       },
-      "engines": {
-        "node": ">=22"
-      },
       "optionalDependencies": {
-        "@github/copilot-darwin-arm64": "0.0.383",
-        "@github/copilot-darwin-x64": "0.0.383",
-        "@github/copilot-linux-arm64": "0.0.383",
-        "@github/copilot-linux-x64": "0.0.383",
-        "@github/copilot-win32-arm64": "0.0.383",
-        "@github/copilot-win32-x64": "0.0.383"
+        "@github/copilot-darwin-arm64": "1.0.43",
+        "@github/copilot-darwin-x64": "1.0.43",
+        "@github/copilot-linux-arm64": "1.0.43",
+        "@github/copilot-linux-x64": "1.0.43",
+        "@github/copilot-win32-arm64": "1.0.43",
+        "@github/copilot-win32-x64": "1.0.43"
       }
     },
     "node_modules/@github/copilot-darwin-arm64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-darwin-arm64/-/copilot-darwin-arm64-0.0.383.tgz",
-      "integrity": "sha512-GfwHGgVmlYS3ksQhyBRQRUQtGtumRDoszByBfkyoJrDH9bLjAMM3EyS6r5nhmH7PMadjU4ZCkj8FGek7imDGtw==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-darwin-arm64/-/copilot-darwin-arm64-1.0.43.tgz",
+      "integrity": "sha512-VMaWfoUwIt19TGzmvTv/In5ITgFWfu91ZILt4Lb77gSmVbwbs+DahP2lbvM1s/GtGwOknwhOJLp4q2WMgK3CoQ==",
       "cpu": [
         "arm64"
       ],
@@ -499,9 +496,9 @@
       }
     },
     "node_modules/@github/copilot-darwin-x64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-darwin-x64/-/copilot-darwin-x64-0.0.383.tgz",
-      "integrity": "sha512-4gTjY9St/MyFadPpdvVYiGjvHPPYmFns6ic3AX3q+HTpj1zqGpnjLbwfZeM/Lfb84oMIhM2sR1G/Bv8B+T3l/g==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-darwin-x64/-/copilot-darwin-x64-1.0.43.tgz",
+      "integrity": "sha512-lCxg75zbgtWggb1p+IHhlhmulQj7BKIc+9pUsTwJ3Mjt51kiUYmD6LF2BD1/Ed4M3GMumSu4UTSIv9pL96n0Wg==",
       "cpu": [
         "x64"
       ],
@@ -516,9 +513,9 @@
       }
     },
     "node_modules/@github/copilot-linux-arm64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-linux-arm64/-/copilot-linux-arm64-0.0.383.tgz",
-      "integrity": "sha512-QoqK76G7sAh7DVpg2GlnIDa5lYe9FK9U1oFwOVjwXwwKJe8PpIWwNVeO4nERGrkc4CQy7u4U59GSmfXQzoFXvw==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-linux-arm64/-/copilot-linux-arm64-1.0.43.tgz",
+      "integrity": "sha512-Jr1rvt/Syz5oVSiU53keRKEV8f5xTLkmiB2qasAV6Emk7K82/BZW5HfW8cDadfHnlAS1+UVPpoO+8ykgx4dikw==",
       "cpu": [
         "arm64"
       ],
@@ -533,9 +530,9 @@
       }
     },
     "node_modules/@github/copilot-linux-x64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-linux-x64/-/copilot-linux-x64-0.0.383.tgz",
-      "integrity": "sha512-EJHnq575pv7N586WjQkZZdDLqfd2GemGxk3aIhWrHtXMmLY4qRAJJBUnF1MtNqccTKuPmLuD8nAUTrxQp7sWPA==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-linux-x64/-/copilot-linux-x64-1.0.43.tgz",
+      "integrity": "sha512-uyWyPpcwMC1tIHJTA1OPzIm1i/Eeku0NjFzPYnFvpfGug9pkL4xcUr8A2UNl8cVvxq/VQMwtYckV3G12ySJTFw==",
       "cpu": [
         "x64"
       ],
@@ -550,9 +547,9 @@
       }
     },
     "node_modules/@github/copilot-win32-arm64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-win32-arm64/-/copilot-win32-arm64-0.0.383.tgz",
-      "integrity": "sha512-76NT8ULHpbmM/YOz71FPAUUfAhfEVqhEew+Wkqtgn+eG48gCnDYu3ZQIRbnWIh/oj6nYVTyi0wg9LUt7M8sFRQ==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-win32-arm64/-/copilot-win32-arm64-1.0.43.tgz",
+      "integrity": "sha512-vY3rwkW1h7ixSqYd9XT/xGjxkepvQVJK2q1sYhSPBN4Wvuk37fRjN7ox3QU1lhpxlYQMc/g+ZR58u5cx31n1lw==",
       "cpu": [
         "arm64"
       ],
@@ -567,9 +564,9 @@
       }
     },
     "node_modules/@github/copilot-win32-x64": {
-      "version": "0.0.383",
-      "resolved": "https://registry.npmjs.org/@github/copilot-win32-x64/-/copilot-win32-x64-0.0.383.tgz",
-      "integrity": "sha512-/5r5uK8pUoefS8H9cax96GqBzm62uBeXEphct7SxPU/gnf2udDvb+0iBOlvKskAwdWNXLp3Khxgm4nfFgxrr9A==",
+      "version": "1.0.43",
+      "resolved": "https://registry.npmjs.org/@github/copilot-win32-x64/-/copilot-win32-x64-1.0.43.tgz",
+      "integrity": "sha512-AjGsebDbJmBxe9FFf2McSN5r2Joi8cFY879lxaQaXxfGjzOHblzvbhflbsX9x2GnvCfDdDiow413WvOGqKDH8g==",
       "cpu": [
         "x64"
       ],
diff --git a/test/harness/package.json b/test/harness/package.json
index cacceb4fcc..f823443bdc 100644
--- a/test/harness/package.json
+++ b/test/harness/package.json
@@ -11,7 +11,7 @@
     "test": "vitest run"
   },
   "devDependencies": {
-    "@github/copilot": "^0.0.383",
+    "@github/copilot": "^1.0.43",
     "@types/node": "^25.0.3",
     "openai": "^6.15.0",
     "tsx": "^4.21.0",