From 86d64b2b352e1e96c4eaf136910625ec8a721be8 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Tue, 24 Mar 2026 12:16:37 +0000
Subject: [PATCH] chore: migrate to TypeScript 6.0

- Update typescript from 5.9.3 to 6.0.2
- Remove deprecated baseUrl option (migrate absolute imports to relative)
- Remove esModuleInterop (always enabled in TS 6.0)
- Change module from CommonJS to preserve (tsup handles bundling)
- Add explicit moduleResolution: bundler (node10 deprecated)
- Add explicit types: ["node"] (default changed to [])
- Add ignoreDeprecations: "6.0" (needed for tsup's internal baseUrl usage)

https://claude.ai/code/session_0168r2kkTqkaA39YaV2XPVac
---
 package-lock.json                | 8 ++++----
 package.json                     | 2 +-
 src/stream/isStreamCloudEvent.ts | 8 ++++----
 src/stream/isStreamError.ts      | 2 +-
 src/stream/isStreamEventType.ts  | 4 ++--
 src/stream/isStreamSubject.ts    | 2 +-
 tsconfig.json                    | 9 +++++----
 7 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 797ebba..39cd1a9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
         "get-port": "7.2.0",
         "tsup": "8.5.1",
         "tsx": "4.21.0",
-        "typescript": "5.9.3"
+        "typescript": "6.0.2"
       }
     },
     "node_modules/@balena/dockerignore": {
@@ -3342,9 +3342,9 @@
       "license": "Unlicense"
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.2.tgz",
+      "integrity": "sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index 7e79b4a..7aaf31c 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "get-port": "7.2.0",
     "tsup": "8.5.1",
     "tsx": "4.21.0",
-    "typescript": "5.9.3"
+    "typescript": "6.0.2"
   },
   "scripts": {
     "analyze": "npx tsc --noEmit && npx biome check --error-on-warnings .",
diff --git a/src/stream/isStreamCloudEvent.ts b/src/stream/isStreamCloudEvent.ts
index b0270a4..599097f 100644
--- a/src/stream/isStreamCloudEvent.ts
+++ b/src/stream/isStreamCloudEvent.ts
@@ -1,8 +1,8 @@
-import { isRecord } from 'src/types/isRecord.js';
-import { isString } from 'src/types/isString.js';
-import { isStringOrNull } from 'src/types/isStringOrNull.js';
-import { isStringOrUndefined } from 'src/types/isStringOrUndefined.js';
 import { hasShapeOf } from '../types/hasShapeOf.js';
+import { isRecord } from '../types/isRecord.js';
+import { isString } from '../types/isString.js';
+import { isStringOrNull } from '../types/isStringOrNull.js';
+import { isStringOrUndefined } from '../types/isStringOrUndefined.js';
 import type { StreamCloudEvent } from './StreamCloudEvent.js';
 
 const isStreamCloudEvent = (line: unknown): line is StreamCloudEvent => {
diff --git a/src/stream/isStreamError.ts b/src/stream/isStreamError.ts
index 46613d0..c2b7092 100644
--- a/src/stream/isStreamError.ts
+++ b/src/stream/isStreamError.ts
@@ -1,5 +1,5 @@
-import { isString } from 'src/types/isString.js';
 import { hasShapeOf } from '../types/hasShapeOf.js';
+import { isString } from '../types/isString.js';
 import type { StreamError } from './StreamError.js';
 
 const isStreamError = (line: unknown): line is StreamError => {
diff --git a/src/stream/isStreamEventType.ts b/src/stream/isStreamEventType.ts
index f2f68b7..eb0a16a 100644
--- a/src/stream/isStreamEventType.ts
+++ b/src/stream/isStreamEventType.ts
@@ -1,6 +1,6 @@
-import { isBoolean } from 'src/types/isBoolean.js';
-import { isString } from 'src/types/isString.js';
 import { hasShapeOf } from '../types/hasShapeOf.js';
+import { isBoolean } from '../types/isBoolean.js';
+import { isString } from '../types/isString.js';
 import type { StreamEventType } from './StreamEventType.js';
 
 const isStreamEventType = (line: unknown): line is StreamEventType => {
diff --git a/src/stream/isStreamSubject.ts b/src/stream/isStreamSubject.ts
index 86e5fbe..048e51f 100644
--- a/src/stream/isStreamSubject.ts
+++ b/src/stream/isStreamSubject.ts
@@ -1,5 +1,5 @@
-import { isString } from 'src/types/isString.js';
 import { hasShapeOf } from '../types/hasShapeOf.js';
+import { isString } from '../types/isString.js';
 import type { StreamSubject } from './StreamSubject.js';
 
 const isStreamSubject = (line: unknown): line is StreamSubject => {
diff --git a/tsconfig.json b/tsconfig.json
index c91503f..7f0e86a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,14 +1,15 @@
 {
 	"compilerOptions": {
-		"baseUrl": ".",
+		"ignoreDeprecations": "6.0",
 		"declaration": true,
-		"esModuleInterop": true,
 		"lib": ["ES2023"],
-		"module": "CommonJS",
+		"module": "preserve",
+		"moduleResolution": "bundler",
 		"outDir": "dist",
 		"resolveJsonModule": true,
 		"strict": true,
-		"target": "ES2023"
+		"target": "ES2023",
+		"types": ["node"]
 	},
 	"include": ["./src/**/*.ts"],
 	"exclude": ["./dist"]