From c06478c581a498449e0fc0f37f2b5c850101e09b Mon Sep 17 00:00:00 2001
From: lukasIO <mail@lukasseiler.de>
Date: Wed, 1 Oct 2025 09:34:33 +0200
Subject: [PATCH 1/3] Fix TS 5.9 generic Uint8Array declaration when inferred

---
 package.json                  |  2 +-
 src/e2ee/worker/sifPayload.ts | 16 ++++++++++------
 src/room/track/LocalTrack.ts  |  2 +-
 3 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/package.json b/package.json
index 75c3f6aa62..99967f3f8e 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "format": "prettier --write src examples/**/*.ts",
     "format:check": "prettier --check src examples/**/*.ts",
     "ci:publish": "pnpm build:clean && pnpm compat && changeset publish",
-    "downlevel-dts": "downlevel-dts ./dist/ ./dist/ts4.2 --to=4.2",
+    "downlevel-dts": "downlevel-dts ./dist/src ./dist/ts4.2 --to=4.2",
     "compat": "eslint --no-eslintrc --config ./.eslintrc.dist.cjs ./dist/livekit-client.umd.js",
     "size-limit": "size-limit"
   },
diff --git a/src/e2ee/worker/sifPayload.ts b/src/e2ee/worker/sifPayload.ts
index f86e9ca06d..09f0baf41f 100644
--- a/src/e2ee/worker/sifPayload.ts
+++ b/src/e2ee/worker/sifPayload.ts
@@ -2,25 +2,29 @@ import type { VideoCodec } from '../..';
 
 //  Payload definitions taken from https://github.com/livekit/livekit/blob/master/pkg/sfu/downtrack.go#L104
 
-export const VP8KeyFrame8x8 = new Uint8Array([
+export const VP8KeyFrame8x8: Uint8Array = new Uint8Array([
   0x10, 0x02, 0x00, 0x9d, 0x01, 0x2a, 0x08, 0x00, 0x08, 0x00, 0x00, 0x47, 0x08, 0x85, 0x85, 0x88,
   0x85, 0x84, 0x88, 0x02, 0x02, 0x00, 0x0c, 0x0d, 0x60, 0x00, 0xfe, 0xff, 0xab, 0x50, 0x80,
 ]);
 
-export const H264KeyFrame2x2SPS = new Uint8Array([
+export const H264KeyFrame2x2SPS: Uint8Array = new Uint8Array([
   0x67, 0x42, 0xc0, 0x1f, 0x0f, 0xd9, 0x1f, 0x88, 0x88, 0x84, 0x00, 0x00, 0x03, 0x00, 0x04, 0x00,
   0x00, 0x03, 0x00, 0xc8, 0x3c, 0x60, 0xc9, 0x20,
 ]);
 
-export const H264KeyFrame2x2PPS = new Uint8Array([0x68, 0x87, 0xcb, 0x83, 0xcb, 0x20]);
+export const H264KeyFrame2x2PPS: Uint8Array = new Uint8Array([0x68, 0x87, 0xcb, 0x83, 0xcb, 0x20]);
 
-export const H264KeyFrame2x2IDR = new Uint8Array([
+export const H264KeyFrame2x2IDR: Uint8Array = new Uint8Array([
   0x65, 0x88, 0x84, 0x0a, 0xf2, 0x62, 0x80, 0x00, 0xa7, 0xbe,
 ]);
 
-export const H264KeyFrame2x2 = [H264KeyFrame2x2SPS, H264KeyFrame2x2PPS, H264KeyFrame2x2IDR];
+export const H264KeyFrame2x2: Uint8Array[] = [
+  H264KeyFrame2x2SPS,
+  H264KeyFrame2x2PPS,
+  H264KeyFrame2x2IDR,
+];
 
-export const OpusSilenceFrame = new Uint8Array([
+export const OpusSilenceFrame: Uint8Array = new Uint8Array([
   0xf8, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
diff --git a/src/room/track/LocalTrack.ts b/src/room/track/LocalTrack.ts
index c6171a6c2a..5e632f36a0 100644
--- a/src/room/track/LocalTrack.ts
+++ b/src/room/track/LocalTrack.ts
@@ -670,7 +670,7 @@ export default abstract class LocalTrack<
   }
 
   /** @internal */
-  getPreConnectBuffer() {
+  getPreConnectBuffer(): ReadableStream<Uint8Array> | undefined {
     return this.localTrackRecorder?.byteStream;
   }
 

From 635fef06e95e97ab8b06b00e30997b44d7cdbbd2 Mon Sep 17 00:00:00 2001
From: lukasIO <mail@lukasseiler.de>
Date: Wed, 1 Oct 2025 09:42:02 +0200
Subject: [PATCH 2/3] Create fifty-shoes-act.md

---
 .changeset/fifty-shoes-act.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/fifty-shoes-act.md

diff --git a/.changeset/fifty-shoes-act.md b/.changeset/fifty-shoes-act.md
new file mode 100644
index 0000000000..47950fe5e1
--- /dev/null
+++ b/.changeset/fifty-shoes-act.md
@@ -0,0 +1,5 @@
+---
+"livekit-client": patch
+---
+
+Fix TS 5.9 generic Uint8Array declaration when inferred

From cf147f97c922d769ff20c5663a9a68225e3cbbb4 Mon Sep 17 00:00:00 2001
From: lukasIO <mail@lukasseiler.de>
Date: Wed, 1 Oct 2025 09:51:35 +0200
Subject: [PATCH 3/3] fix ts versions output path

---
 package.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index 99967f3f8e..4676e608ed 100644
--- a/package.json
+++ b/package.json
@@ -25,10 +25,10 @@
   "typesVersions": {
     "<4.8": {
       "./dist/src/index.d.ts": [
-        "./dist/ts4.2/src/index.d.ts"
+        "./dist/ts4.2/index.d.ts"
       ],
       "./dist/src/e2ee/worker/e2ee.worker.d.ts": [
-        "./dist/ts4.2/dist/src/e2ee/worker/e2ee.worker.d.ts"
+        "./dist/ts4.2/e2ee/worker/e2ee.worker.d.ts"
       ]
     }
   },