diff --git a/types/node/diagnostics_channel.d.ts b/types/node/diagnostics_channel.d.ts
index a88c7454d716d5..a6deb7dcd6e17d 100644
--- a/types/node/diagnostics_channel.d.ts
+++ b/types/node/diagnostics_channel.d.ts
@@ -33,7 +33,10 @@ declare module "node:diagnostics_channel" {
      * @param name The channel name
      * @return The named channel object
      */
-    function channel(name: string | symbol): Channel;
+    // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+    function channel<ContextType = any, StoreType = ContextType>(
+        name: string | symbol,
+    ): Channel<ContextType, StoreType>;
     type ChannelListener = (message: unknown, name: string | symbol) => void;
     /**
      * Register a message handler to subscribe to this channel. This message handler
@@ -96,12 +99,9 @@ declare module "node:diagnostics_channel" {
      * @param nameOrChannels Channel name or object containing all the `TracingChannel Channels`
      * @return Collection of channels to trace with
      */
-    function tracingChannel<
-        StoreType = unknown,
-        ContextType extends object = StoreType extends object ? StoreType : object,
-    >(
-        nameOrChannels: string | TracingChannelCollection<StoreType, ContextType>,
-    ): TracingChannel<StoreType, ContextType>;
+    function tracingChannel<ContextType extends object = object, StoreType = ContextType>(
+        nameOrChannels: string | TracingChannelCollection<ContextType, StoreType>,
+    ): TracingChannel<ContextType, StoreType>;
     /**
      * The class `Channel` represents an individual named channel within the data
      * pipeline. It is used to track subscribers and to publish messages when there
@@ -111,7 +111,7 @@ declare module "node:diagnostics_channel" {
      * with `new Channel(name)` is not supported.
      * @since v15.1.0, v14.17.0
      */
-    class Channel<StoreType = unknown, ContextType = StoreType> {
+    class Channel<ContextType = any, StoreType = ContextType> {
         readonly name: string | symbol;
         /**
          * Check if there are active subscribers to this channel. This is helpful if
@@ -304,12 +304,12 @@ declare module "node:diagnostics_channel" {
             },
         ) => void;
     }
-    interface TracingChannelCollection<StoreType = unknown, ContextType = StoreType> {
-        start: Channel<StoreType, ContextType>;
-        end: Channel<StoreType, ContextType>;
-        asyncStart: Channel<StoreType, ContextType>;
-        asyncEnd: Channel<StoreType, ContextType>;
-        error: Channel<StoreType, ContextType>;
+    interface TracingChannelCollection<ContextType extends object = object, StoreType = ContextType> {
+        start: Channel<ContextType, StoreType>;
+        end: Channel<ContextType, StoreType>;
+        asyncStart: Channel<ContextType, StoreType>;
+        asyncEnd: Channel<ContextType, StoreType>;
+        error: Channel<ContextType, StoreType>;
     }
     /**
      * The class `TracingChannel` is a collection of `TracingChannel Channels` which
@@ -320,12 +320,9 @@ declare module "node:diagnostics_channel" {
      * @since v19.9.0
      * @experimental
      */
-    class TracingChannel<StoreType = unknown, ContextType extends object = {}> implements TracingChannelCollection {
-        start: Channel<StoreType, ContextType>;
-        end: Channel<StoreType, ContextType>;
-        asyncStart: Channel<StoreType, ContextType>;
-        asyncEnd: Channel<StoreType, ContextType>;
-        error: Channel<StoreType, ContextType>;
+    interface TracingChannel<ContextType extends object = object, StoreType = ContextType>
+        extends TracingChannelCollection<ContextType, StoreType>
+    {
         /**
          * Helper to subscribe a collection of functions to the corresponding channels.
          * This is the same as calling `channel.subscribe(onMessage)` on each channel
diff --git a/types/node/node-tests/diagnostics_channel.ts b/types/node/node-tests/diagnostics_channel.ts
index be47b2a12a9398..7ec4d7600bef12 100644
--- a/types/node/node-tests/diagnostics_channel.ts
+++ b/types/node/node-tests/diagnostics_channel.ts
@@ -25,22 +25,21 @@ unsubscribe(Symbol.for("test-symbol"), listener);
 const hasSubs = hasSubscribers("test");
 
 {
-    const channelsByName = tracingChannel<number, { requestId: number }>("my-channel");
-    channelsByName.start; // $ExpectType Channel<number, { requestId: number; }>
+    const channelsByName = tracingChannel<{ requestId: number }, number>("my-channel");
+    channelsByName.start; // $ExpectType Channel<{ requestId: number }, number>
 
-    type MyChannel = Channel<number, { requestId: number }>;
     const channelsByCollection = tracingChannel({
-        start: channel("tracing:my-channel:start") as MyChannel,
-        end: channel("tracing:my-channel:end") as MyChannel,
-        asyncStart: channel("tracing:my-channel:asyncStart") as MyChannel,
-        asyncEnd: channel("tracing:my-channel:asyncEnd") as MyChannel,
-        error: channel("tracing:my-channel:error") as MyChannel,
+        start: channel<{ requestId: number }, number>("tracing:my-channel:start"),
+        end: channel<{ requestId: number }, number>("tracing:my-channel:end"),
+        asyncStart: channel<{ requestId: number }, number>("tracing:my-channel:asyncStart"),
+        asyncEnd: channel<{ requestId: number }, number>("tracing:my-channel:asyncEnd"),
+        error: channel<{ requestId: number }, number>("tracing:my-channel:error"),
     });
-    channelsByCollection.start; // $ExpectType Channel<number, { requestId: number; }>
+    channelsByCollection.start; // $ExpectType Channel<{ requestId: number }, number>
 }
 
 {
-    const channels = tracingChannel<number, { requestId: number }>("my-channel");
+    const channels = tracingChannel<{ requestId: number }, number>("my-channel");
     const store = new AsyncLocalStorage<number>();
 
     channels.start.bindStore(store);
diff --git a/types/object-treeify/.npmignore b/types/object-treeify/.npmignore
new file mode 100644
index 00000000000000..93e307400a5456
--- /dev/null
+++ b/types/object-treeify/.npmignore
@@ -0,0 +1,5 @@
+*
+!**/*.d.ts
+!**/*.d.cts
+!**/*.d.mts
+!**/*.d.*.ts
diff --git a/types/object-treeify/index.d.ts b/types/object-treeify/index.d.ts
new file mode 100644
index 00000000000000..404de2a01666d3
--- /dev/null
+++ b/types/object-treeify/index.d.ts
@@ -0,0 +1,23 @@
+export type RenderFunction = (node: unknown) => unknown;
+
+export type SortFunction = (firstKey: string, secondKey: string) => number;
+
+export interface Options {
+    joined?: boolean;
+    spacerNoNeighbour?: string;
+    spacerNeighbour?: string;
+    keyNoNeighbour?: string;
+    keyNeighbour?: string;
+    separator?: string;
+    renderFn?: RenderFunction;
+    sortFn?: SortFunction | null;
+    breakCircularWith?: string | null;
+}
+
+declare function treeify(tree: object, options: Options & { joined: false }): string[];
+
+declare function treeify(tree: object, options?: Options & { joined?: true }): string;
+
+declare function treeify(tree: object, options: Options): string | string[];
+
+export default treeify;
diff --git a/types/object-treeify/object-treeify-tests.ts b/types/object-treeify/object-treeify-tests.ts
new file mode 100644
index 00000000000000..64b950660d9f8b
--- /dev/null
+++ b/types/object-treeify/object-treeify-tests.ts
@@ -0,0 +1,30 @@
+import treeify, { type Options, type RenderFunction, type SortFunction } from "object-treeify";
+
+const tree = {
+    parent: {
+        child: "value",
+    },
+};
+
+// $ExpectType string
+treeify(tree);
+
+// $ExpectType string[]
+treeify(tree, { joined: false });
+
+const renderFn: RenderFunction = (node) => node;
+const sortFn: SortFunction = (firstKey, secondKey) => firstKey.localeCompare(secondKey);
+const options: Options = {
+    renderFn,
+    sortFn,
+    breakCircularWith: null,
+};
+
+// $ExpectType string | string[]
+treeify(tree, options);
+
+// @ts-expect-error for unsupported option
+treeify(tree, { unknownOption: true });
+
+// @ts-expect-error for invalid return type
+treeify(tree, { sortFn: () => "invalid" });
diff --git a/types/object-treeify/package.json b/types/object-treeify/package.json
new file mode 100644
index 00000000000000..aa22d5e23f82c7
--- /dev/null
+++ b/types/object-treeify/package.json
@@ -0,0 +1,18 @@
+{
+    "private": true,
+    "name": "@types/object-treeify",
+    "version": "5.0.9999",
+    "type": "module",
+    "projects": [
+        "https://github.com/blackflux/object-treeify"
+    ],
+    "devDependencies": {
+        "@types/object-treeify": "workspace:."
+    },
+    "owners": [
+        {
+            "name": "Patrik Csak",
+            "githubUsername": "patrik-csak"
+        }
+    ]
+}
diff --git a/types/object-treeify/tsconfig.json b/types/object-treeify/tsconfig.json
new file mode 100644
index 00000000000000..0c30b9068d4af0
--- /dev/null
+++ b/types/object-treeify/tsconfig.json
@@ -0,0 +1,19 @@
+{
+    "compilerOptions": {
+        "module": "node16",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "object-treeify-tests.ts"
+    ]
+}