From e28258fc7f871c1824ed8e2db51d0086b7c1a0aa Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Tue, 21 Apr 2026 07:54:27 +0000
Subject: [PATCH] fix(ci): make build compatible with TypeScript 6.0.3

TS 6.0 tightens several defaults that broke the build:
- require rootDir explicitly when tsconfig sits above src
- drop deprecated target: es5 in favor of es2020
- node globals (Buffer) need explicit types entry
- stricter null-checks now surface packet.stratum as possibly undefined
---
 package.json           | 2 +-
 src/NtpPacketParser.ts | 2 +-
 tsconfig.json          | 4 +++-
 yarn.lock              | 8 ++++----
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/package.json b/package.json
index 1d1cf5b..0976bec 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "prettier": "3.8.3",
     "ts-mocha": "11.1.0",
     "ts-node": "10.9.2",
-    "typescript": "5.9.3"
+    "typescript": "6.0.3"
   },
   "resolutions": {
     "ts-node/diff": "^4.0.4"
diff --git a/src/NtpPacketParser.ts b/src/NtpPacketParser.ts
index e29ac0d..3c384e9 100644
--- a/src/NtpPacketParser.ts
+++ b/src/NtpPacketParser.ts
@@ -26,7 +26,7 @@ export class NtpPacketParser {
       {
         name: "referenceId",
         bits: 32,
-        converter: (value, packet) => this._ntpIdentifier(packet.stratum, value),
+        converter: (value, packet) => this._ntpIdentifier(packet.stratum!, value),
       } as PacketStruct<"referenceId">,
       {
         name: "referenceTimestamp",
diff --git a/tsconfig.json b/tsconfig.json
index d2c73c6..17aaa2d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,8 +1,10 @@
 {
   "compilerOptions": {
     "outDir": "./dist",
+    "rootDir": "./src",
     "allowJs": true,
-    "target": "es5",
+    "target": "es2020",
+    "types": ["node"],
     "noEmitOnError": true,
     "noImplicitAny": true,
     "noImplicitReturns": true,
diff --git a/yarn.lock b/yarn.lock
index 5a83224..49d0fef 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -422,10 +422,10 @@ ts-node@10.9.2:
     v8-compile-cache-lib "^3.0.1"
     yn "3.1.1"
 
-typescript@5.9.3:
-  version "5.9.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-5.9.3.tgz#5b4f59e15310ab17a216f5d6cf53ee476ede670f"
-  integrity sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==
+typescript@6.0.3:
+  version "6.0.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-6.0.3.tgz#90251dc007916e972786cb94d74d15b185577d21"
+  integrity sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==
 
 undici-types@~6.21.0:
   version "6.21.0"