diff --git a/README.md b/README.md
index ce0170510..c5f35f90d 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ This repository contains the source code for the Aspire Community Toolkit, a col
 | - **Learn More**: [`Hosting.Deno`][deno-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.Deno][deno-shields]][deno-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Deno][deno-shields-preview]][deno-nuget-preview]                                                                                                                                   | A hosting integration for the Deno apps.                                                                                                                                    |
 | - **Learn More**: [`Hosting.SqlDatabaseProjects`][sql-database-projects-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.SqlDatabaseProjects][sql-database-projects-shields]][sql-database-projects-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.SqlDatabaseProjects][sql-database-projects-shields-preview]][sql-database-projects-nuget-preview] | A hosting integration for the SQL Databases Projects.                                                                                                                       |
 | - **Learn More**: [`Hosting.Rust`][rust-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.Rust][rust-shields]][rust-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Rust][rust-shields-preview]][rust-nuget-preview]                                                                                                                                   | A hosting integration for the Rust apps.                                                                                                                                    |
-| - **Learn More**: [`Hosting.Bun`][bun-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.Bun][bun-shields]][bun-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Bun][bun-shields-preview]][bun-nuget-preview]                                                                                                                                           | A hosting integration for the Bun apps.                                                                                                                                     |
+| - **Learn More**: [`Hosting.Bun`][bun-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.Bun][bun-shields]][bun-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Bun][bun-shields-preview]][bun-nuget-preview]                                                                                                                                           | **Deprecated**: use the core `Aspire.Hosting.JavaScript` `AddBunApp(...)` integration.                                                                                    |
 | - **Learn More**: [`Hosting.Perl`][perl-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.Perl][perl-shields]][perl-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Perl][perl-shields-preview]][perl-nuget-preview]                                                                                                                                    | A hosting integration for Perl scripts and APIs.                                                                                                                            |
 | - **Learn More**: [`Hosting.Python.Extensions`][python-ext-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Python.Extensions][python-ext-shields]][python-ext-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.Python.Extensions][python-ext-shields-preview]][python-ext-nuget-preview]                                                                      | An integration that contains some additional extensions for running python applications                                                                                     |
 | - **Learn More**: [`Hosting.KurrentDB`][kurrentdb-integration-docs] <br /> - Stable 📦: [![CommunityToolkit.Aspire.Hosting.KurrentDB][kurrentdb-shields]][kurrentdb-nuget] <br /> - Preview 📦: [![CommunityToolkit.Aspire.Hosting.KurrentDB][kurrentdb-shields-preview]][kurrentdb-nuget-preview]                                                                                           | An Aspire hosting integration leveraging the [KurrentDB](https://www.kurrent.io) container.                                                                                 |
diff --git a/examples/bun/CommunityToolkit.Aspire.Hosting.Bun.AppHost/Program.cs b/examples/bun/CommunityToolkit.Aspire.Hosting.Bun.AppHost/Program.cs
index 4003493f6..d8590ee2c 100644
--- a/examples/bun/CommunityToolkit.Aspire.Hosting.Bun.AppHost/Program.cs
+++ b/examples/bun/CommunityToolkit.Aspire.Hosting.Bun.AppHost/Program.cs
@@ -1,3 +1,5 @@
+#pragma warning disable CS0618
+
 var builder = DistributedApplication.CreateBuilder(args);
 
 var api = builder.AddBunApp("api")
@@ -6,3 +8,5 @@
     .WithHttpHealthCheck("/");
 
 builder.Build().Run();
+
+#pragma warning restore CS0618
diff --git a/src/CommunityToolkit.Aspire.Hosting.Bun/BunAppExtensions.cs b/src/CommunityToolkit.Aspire.Hosting.Bun/BunAppExtensions.cs
index e87b4c5c4..43d994dee 100644
--- a/src/CommunityToolkit.Aspire.Hosting.Bun/BunAppExtensions.cs
+++ b/src/CommunityToolkit.Aspire.Hosting.Bun/BunAppExtensions.cs
@@ -11,6 +11,8 @@ namespace Aspire.Hosting;
 /// </summary>
 public static class BunAppExtensions
 {
+    private const string BunDeprecationMessage = "CommunityToolkit.Aspire.Hosting.Bun is deprecated. Use Aspire.Hosting.JavaScript and builder.AddBunApp(...) instead. This package will be removed in a future release.";
+
     /// <summary>
     /// Adds a Bun app to the builder.
     /// </summary>
@@ -21,6 +23,7 @@ public static class BunAppExtensions
     /// <param name="watch">Whether to watch for changes.</param>
     /// <returns>A reference to the <see cref="IResourceBuilder{T}"/>.</returns>
     [AspireExport]
+    [Obsolete(BunDeprecationMessage)]
     public static IResourceBuilder<BunAppResource> AddBunApp(
         this IDistributedApplicationBuilder builder,
         [ResourceName] string name,
@@ -51,6 +54,7 @@ public static IResourceBuilder<BunAppResource> AddBunApp(
     /// <returns>A reference to the <see cref="IResourceBuilder{T}"/>.</returns>
     /// <remarks>This overload is not available in polyglot app hosts. Use <see cref="WithBunPackageInstallation(IResourceBuilder{BunAppResource})"/> instead.</remarks>
     [AspireExportIgnore(Reason = "Action<IResourceBuilder<BunInstallerResource>> is not ATS-compatible. Use the overload without configureInstaller instead.")]
+    [Obsolete(BunDeprecationMessage)]
     public static IResourceBuilder<BunAppResource> WithBunPackageInstallation(this IResourceBuilder<BunAppResource> resource, Action<IResourceBuilder<BunInstallerResource>>? configureInstaller = null)
         => WithBunPackageInstallationCore(resource, configureInstaller);
 
diff --git a/src/CommunityToolkit.Aspire.Hosting.Bun/CommunityToolkit.Aspire.Hosting.Bun.csproj b/src/CommunityToolkit.Aspire.Hosting.Bun/CommunityToolkit.Aspire.Hosting.Bun.csproj
index 771dbd5b9..c2899924f 100644
--- a/src/CommunityToolkit.Aspire.Hosting.Bun/CommunityToolkit.Aspire.Hosting.Bun.csproj
+++ b/src/CommunityToolkit.Aspire.Hosting.Bun/CommunityToolkit.Aspire.Hosting.Bun.csproj
@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <AdditionalPackageTags>hosting bun javascript</AdditionalPackageTags>
-    <Description>An Aspire integration for hosting Bun apps.</Description>
+    <AdditionalPackageTags>hosting bun javascript deprecated</AdditionalPackageTags>
+    <Description>An Aspire integration for hosting Bun apps. DEPRECATED: Use Aspire.Hosting.JavaScript and builder.AddBunApp(...) instead. This package will be removed in a future release.</Description>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/CommunityToolkit.Aspire.Hosting.Bun/README.md b/src/CommunityToolkit.Aspire.Hosting.Bun/README.md
index 951b227a2..d4bb13a9d 100644
--- a/src/CommunityToolkit.Aspire.Hosting.Bun/README.md
+++ b/src/CommunityToolkit.Aspire.Hosting.Bun/README.md
@@ -1,5 +1,15 @@
 # CommunityToolkit.Aspire.Hosting.Bun library
 
+> **⚠️ DEPRECATION NOTICE**  
+> This package is deprecated. Bun support is now available in the core `Aspire.Hosting.JavaScript` package via `AddBunApp(...)`.
+>
+> **Migration Guide:**
+> - Install `Aspire.Hosting.JavaScript` and remove `CommunityToolkit.Aspire.Hosting.Bun`.
+> - Review existing `builder.AddBunApp(...)` calls carefully: if you pass arguments positionally, you may need to reorder them or convert them to named arguments when moving to the core package implementation.
+> - If you're using TypeScript AppHost bindings, continue using `builder.addBunApp(...)` from the generated core bindings.
+>
+> This package will be removed in a future release. Please migrate to `Aspire.Hosting.JavaScript`.
+
 Provides extension methods and resource definitions for an Aspire AppHost to configure a Bun project.
 
 ## Getting Started
@@ -22,6 +32,32 @@ builder.AddBunApp("bun-server", "main.ts")
     .WithEndpoint();
 ```
 
+### Migration from Toolkit Bun to core Bun
+
+Toolkit API:
+
+```csharp
+builder.AddBunApp("api", "server.ts")
+    .WithHttpEndpoint(env: "PORT");
+```
+
+Core API (`Aspire.Hosting.JavaScript`):
+
+```csharp
+builder.AddBunApp("api", "./api", "server.ts")
+    .WithHttpEndpoint(env: "PORT")
+    .WithExternalHttpEndpoints();
+```
+
+TypeScript AppHost (core bindings):
+
+```typescript
+await builder
+    .addBunApp("api", "./api", "server.ts")
+    .withHttpEndpoint({ env: "PORT" })
+    .withExternalHttpEndpoints();
+```
+
 ## Additional Information
 
 https://learn.microsoft.com/dotnet/aspire/community-toolkit/hosting-bun
diff --git a/src/CommunityToolkit.Aspire.Hosting.Bun/api/CommunityToolkit.Aspire.Hosting.Bun.cs b/src/CommunityToolkit.Aspire.Hosting.Bun/api/CommunityToolkit.Aspire.Hosting.Bun.cs
index fb909edd5..a82273f2e 100644
--- a/src/CommunityToolkit.Aspire.Hosting.Bun/api/CommunityToolkit.Aspire.Hosting.Bun.cs
+++ b/src/CommunityToolkit.Aspire.Hosting.Bun/api/CommunityToolkit.Aspire.Hosting.Bun.cs
@@ -11,9 +11,11 @@ namespace Aspire.Hosting
     public static partial class BunAppExtensions
     {
         [AspireExport("addBunApp", Description = "Adds a Bun app")]
+        [System.Obsolete("CommunityToolkit.Aspire.Hosting.Bun is deprecated. Use Aspire.Hosting.JavaScript and builder.AddBunApp(...) instead. This package will be removed in a future release.")]
         public static ApplicationModel.IResourceBuilder<ApplicationModel.BunAppResource> AddBunApp(this IDistributedApplicationBuilder builder, string name, string? workingDirectory = null, string entryPoint = "index.ts", bool watch = false) { throw null; }
 
         [AspireExportIgnore(Reason = "Action<IResourceBuilder<BunInstallerResource>> is not ATS-compatible. Use the overload without configureInstaller instead.")]
+        [System.Obsolete("CommunityToolkit.Aspire.Hosting.Bun is deprecated. Use Aspire.Hosting.JavaScript and builder.AddBunApp(...) instead. This package will be removed in a future release.")]
         public static ApplicationModel.IResourceBuilder<ApplicationModel.BunAppResource> WithBunPackageInstallation(this ApplicationModel.IResourceBuilder<ApplicationModel.BunAppResource> resource, System.Action<ApplicationModel.IResourceBuilder<ApplicationModel.BunInstallerResource>>? configureInstaller = null) { throw null; }
     }
 }
diff --git a/tests/CommunityToolkit.Aspire.Hosting.Bun.Tests/AddBunAppTests.cs b/tests/CommunityToolkit.Aspire.Hosting.Bun.Tests/AddBunAppTests.cs
index b05a8aa52..ce952143e 100644
--- a/tests/CommunityToolkit.Aspire.Hosting.Bun.Tests/AddBunAppTests.cs
+++ b/tests/CommunityToolkit.Aspire.Hosting.Bun.Tests/AddBunAppTests.cs
@@ -3,6 +3,8 @@
 
 namespace CommunityToolkit.Aspire.Hosting.Bun.Tests;
 
+#pragma warning disable CS0618
+
 public class AddBunAppTests
 {
     [Fact]
@@ -159,4 +161,18 @@ public void BunAppWithPackageInstallationCreatesInstallerResource()
         Assert.Equal("bun-bun-install", installerResource.Name);
         Assert.Equal("bun", installerResource.Command);
     }
+
+    [Fact]
+    public void BunExtensionsAreDeprecated()
+    {
+        var addBunAppMethod = typeof(BunAppExtensions).GetMethod(nameof(BunAppExtensions.AddBunApp), [typeof(IDistributedApplicationBuilder), typeof(string), typeof(string), typeof(string), typeof(bool)]);
+        var withPackageInstallationMethod = typeof(BunAppExtensions).GetMethod(nameof(BunAppExtensions.WithBunPackageInstallation), [typeof(IResourceBuilder<BunAppResource>), typeof(Action<IResourceBuilder<BunInstallerResource>>)]);
+
+        Assert.NotNull(addBunAppMethod);
+        Assert.NotNull(withPackageInstallationMethod);
+        Assert.NotNull(addBunAppMethod.GetCustomAttributes(typeof(ObsoleteAttribute), inherit: false).SingleOrDefault());
+        Assert.NotNull(withPackageInstallationMethod.GetCustomAttributes(typeof(ObsoleteAttribute), inherit: false).SingleOrDefault());
+    }
 }
+
+#pragma warning restore CS0618