libarchive

Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>

.buildkite/Dockerfile

@@ -1,12 +1,12 @@
-ARG LLVM_VERSION="18"
-ARG REPORTED_LLVM_VERSION="18.1.8"
+ARG LLVM_VERSION="19"
+ARG REPORTED_LLVM_VERSION="19.1.7"
 ARG OLD_BUN_VERSION="1.1.38"
 ARG DEFAULT_CFLAGS="-mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -ffunction-sections -fdata-sections -faddrsig -fno-unwind-tables -fno-asynchronous-unwind-tables"
 ARG DEFAULT_CXXFLAGS="-flto=full -fwhole-program-vtables -fforce-emit-vtables"
 ARG BUILDKITE_AGENT_TAGS="queue=linux,os=linux,arch=${TARGETARCH}"
 
 FROM --platform=$BUILDPLATFORM ubuntu:20.04 as base-arm64
-FROM --platform=$BUILDPLATFORM ubuntu:18.04 as base-amd64
+FROM --platform=$BUILDPLATFORM ubuntu:20.04 as base-amd64
 FROM base-$TARGETARCH as base
 
 ARG LLVM_VERSION

.buildkite/ci.mjs

@@ -107,9 +107,9 @@ const buildPlatforms = [
   { os: "linux", arch: "aarch64", distro: "amazonlinux", release: "2023", features: ["docker"] },
   { os: "linux", arch: "x64", distro: "amazonlinux", release: "2023", features: ["docker"] },
   { os: "linux", arch: "x64", baseline: true, distro: "amazonlinux", release: "2023", features: ["docker"] },
-  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.20" },
-  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.20" },
-  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.20" },
+  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.21" },
+  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.21" },
+  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.21" },
   { os: "windows", arch: "x64", release: "2019" },
   { os: "windows", arch: "x64", baseline: true, release: "2019" },
 ];
@@ -134,9 +134,9 @@ const testPlatforms = [
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "24.04", tier: "latest" },
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "22.04", tier: "previous" },
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "20.04", tier: "oldest" },
-  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.20", tier: "latest" },
-  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.20", tier: "latest" },
-  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.20", tier: "latest" },
+  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.21", tier: "latest" },
+  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.21", tier: "latest" },
+  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.21", tier: "latest" },
   { os: "windows", arch: "x64", release: "2019", tier: "oldest" },
   { os: "windows", arch: "x64", release: "2019", baseline: true, tier: "oldest" },
 ];
@@ -323,6 +323,7 @@ function getCppAgent(platform, options) {
  */
 function getZigAgent(platform, options) {
   const { arch } = platform;
+
   return {
     queue: "build-zig",
   };
@@ -383,15 +384,21 @@ function getBuildEnv(target, options) {
   const { canary } = options;
   const revision = typeof canary === "number" ? canary : 1;
 
+  const isMusl = abi === "musl";
+
+  let CMAKE_BUILD_TYPE = release ? "Release" : profile === "debug" ? "Debug" : "RelWithDebInfo";
+  if (isMusl && release) {
+    CMAKE_BUILD_TYPE = "MinSizeRel";
+  }
+
   return {
-    CMAKE_BUILD_TYPE: release ? "Release" : profile === "debug" ? "Debug" : "RelWithDebInfo",
+    CMAKE_BUILD_TYPE,
     ENABLE_BASELINE: baseline ? "ON" : "OFF",
     ENABLE_CANARY: revision > 0 ? "ON" : "OFF",
     CANARY_REVISION: revision,
     ENABLE_ASSERTIONS: release ? "OFF" : "ON",
     ENABLE_LOGS: release ? "OFF" : "ON",
-    ABI: abi === "musl" ? "musl" : undefined,
-
+    ABI: isMusl ? "musl" : undefined,
     CMAKE_TLS_VERIFY: "0",
   };
 }
@@ -464,7 +471,7 @@ function getBuildZigStep(platform, options) {
     cancel_on_build_failing: isMergeQueue(),
     env: getBuildEnv(platform, options),
     command: `bun run build:ci --target bun-zig --toolchain ${toolchain}`,
-    timeout_in_minutes: 25,
+    timeout_in_minutes: 35,
   };
 }
 

.buildkite/scripts/upload-release.sh

@@ -201,6 +201,8 @@ function create_release() {
   local artifacts=(
     bun-darwin-aarch64.zip
     bun-darwin-aarch64-profile.zip
+    bun-darwin-x64.zip
+    bun-darwin-x64-profile.zip
     bun-linux-aarch64.zip
     bun-linux-aarch64-profile.zip
     bun-linux-x64.zip

.cursor/rules/zig-javascriptcore-classes.mdc

@@ -0,0 +1,488 @@
+---
+description: How Zig works with JavaScriptCore bindings generator
+globs: 
+alwaysApply: false
+---
+# Bun's JavaScriptCore Class Bindings Generator
+
+This document explains how Bun's class bindings generator works to bridge Zig and JavaScript code through JavaScriptCore (JSC).
+
+## Architecture Overview
+
+Bun's binding system creates a seamless bridge between JavaScript and Zig, allowing Zig implementations to be exposed as JavaScript classes. The system has several key components:
+
+1. **Zig Implementation** (.zig files)
+2. **JavaScript Interface Definition** (.classes.ts files)
+3. **Generated Code** (C++/Zig files that connect everything)
+
+## Class Definition Files
+
+### JavaScript Interface (.classes.ts)
+
+The `.classes.ts` files define the JavaScript API using a declarative approach:
+
+```typescript
+// Example: encoding.classes.ts
+define({
+  name: "TextDecoder", 
+  constructor: true,
+  JSType: "object",
+  finalize: true,
+  proto: {
+    decode: {
+      // Function definition
+      args: 1,
+    },
+    encoding: {
+      // Getter with caching
+      getter: true,
+      cache: true,
+    },
+    fatal: {
+      // Read-only property
+      getter: true, 
+    },
+    ignoreBOM: {
+      // Read-only property
+      getter: true,
+    }
+  }
+});
+```
+
+Each class definition specifies:
+- The class name
+- Whether it has a constructor
+- JavaScript type (object, function, etc.)
+- Properties and methods in the `proto` field
+- Caching strategy for properties
+- Finalization requirements
+
+### Zig Implementation (.zig)
+
+The Zig files implement the native functionality:
+
+```zig
+// Example: TextDecoder.zig
+pub const TextDecoder = struct {
+    // Internal state
+    encoding: []const u8,
+    fatal: bool,
+    ignoreBOM: bool,
+    
+    // Use generated bindings
+    pub usingnamespace JSC.Codegen.JSTextDecoder;
+    pub usingnamespace bun.New(@This());
+    
+    // Constructor implementation - note use of globalObject
+    pub fn constructor(
+        globalObject: *JSGlobalObject,
+        callFrame: *JSC.CallFrame,
+    ) bun.JSError!*TextDecoder {
+        // Implementation
+    }
+    
+    // Prototype methods - note return type includes JSError
+    pub fn decode(
+        this: *TextDecoder,
+        globalObject: *JSGlobalObject,
+        callFrame: *JSC.CallFrame,
+    ) bun.JSError!JSC.JSValue {
+        // Implementation
+    }
+    
+    // Getters
+    pub fn getEncoding(this: *TextDecoder, globalObject: *JSGlobalObject) JSC.JSValue {
+        return JSC.JSValue.createStringFromUTF8(globalObject, this.encoding);
+    }
+    
+    pub fn getFatal(this: *TextDecoder, globalObject: *JSGlobalObject) JSC.JSValue {
+        return JSC.JSValue.jsBoolean(this.fatal);
+    }
+    
+    // Cleanup - note standard pattern of using deinit/deref
+    pub fn deinit(this: *TextDecoder) void {
+        // Release any retained resources
+    }
+    
+    pub fn finalize(this: *TextDecoder) void {
+        this.deinit();
+        // Or sometimes this is used to free memory instead
+        bun.default_allocator.destroy(this);
+    }
+};
+```
+
+Key components in the Zig file:
+- The struct containing native state
+- `usingnamespace JSC.Codegen.JS<ClassName>` to include generated code
+- `usingnamespace bun.New(@This())` for object creation helpers
+- Constructor and methods using `bun.JSError!JSValue` return type for proper error handling
+- Consistent use of `globalObject` parameter name instead of `ctx`
+- Methods matching the JavaScript interface
+- Getters/setters for properties
+- Proper resource cleanup pattern with `deinit()` and `finalize()`
+
+## Code Generation System
+
+The binding generator produces C++ code that connects JavaScript and Zig:
+
+1. **JSC Class Structure**: Creates C++ classes for the JS object, prototype, and constructor
+2. **Memory Management**: Handles GC integration through JSC's WriteBarrier
+3. **Method Binding**: Connects JS function calls to Zig implementations
+4. **Type Conversion**: Converts between JS values and Zig types
+5. **Property Caching**: Implements the caching system for properties
+
+The generated C++ code includes:
+- A JSC wrapper class (`JSTextDecoder`)
+- A prototype class (`JSTextDecoderPrototype`)
+- A constructor function (`JSTextDecoderConstructor`)
+- Function bindings (`TextDecoderPrototype__decodeCallback`)
+- Property getters/setters (`TextDecoderPrototype__encodingGetterWrap`)
+
+## CallFrame Access
+
+The `CallFrame` object provides access to JavaScript execution context:
+
+```zig
+pub fn decode(
+    this: *TextDecoder, 
+    globalObject: *JSGlobalObject,
+    callFrame: *JSC.CallFrame
+) bun.JSError!JSC.JSValue {
+    // Get arguments
+    const input = callFrame.argument(0);
+    const options = callFrame.argument(1);
+    
+    // Get this value
+    const thisValue = callFrame.thisValue();
+    
+    // Implementation with error handling
+    if (input.isUndefinedOrNull()) {
+        return globalObject.throw("Input cannot be null or undefined", .{});
+    }
+    
+    // Return value or throw error
+    return JSC.JSValue.jsString(globalObject, "result");
+}
+```
+
+CallFrame methods include:
+- `argument(i)`: Get the i-th argument
+- `argumentCount()`: Get the number of arguments
+- `thisValue()`: Get the `this` value
+- `callee()`: Get the function being called
+
+## Property Caching and GC-Owned Values
+
+The `cache: true` option in property definitions enables JSC's WriteBarrier to efficiently store values:
+
+```typescript
+encoding: {
+  getter: true,
+  cache: true, // Enable caching
+}
+```
+
+### C++ Implementation
+
+In the generated C++ code, caching uses JSC's WriteBarrier:
+
+```cpp
+JSC_DEFINE_CUSTOM_GETTER(TextDecoderPrototype__encodingGetterWrap, (...)) {
+    auto& vm = JSC::getVM(lexicalGlobalObject);
+    Zig::GlobalObject *globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+    JSTextDecoder* thisObject = jsCast<JSTextDecoder*>(JSValue::decode(encodedThisValue));
+    JSC::EnsureStillAliveScope thisArg = JSC::EnsureStillAliveScope(thisObject);
+    
+    // Check for cached value and return if present
+    if (JSValue cachedValue = thisObject->m_encoding.get())
+        return JSValue::encode(cachedValue);
+    
+    // Get value from Zig implementation
+    JSC::JSValue result = JSC::JSValue::decode(
+        TextDecoderPrototype__getEncoding(thisObject->wrapped(), globalObject)
+    );
+    RETURN_IF_EXCEPTION(throwScope, {});
+    
+    // Store in cache for future access
+    thisObject->m_encoding.set(vm, thisObject, result);
+    RELEASE_AND_RETURN(throwScope, JSValue::encode(result));
+}
+```
+
+### Zig Accessor Functions
+
+For each cached property, the generator creates Zig accessor functions that allow Zig code to work with these GC-owned values:
+
+```zig
+// External function declarations
+extern fn TextDecoderPrototype__encodingSetCachedValue(JSC.JSValue, *JSC.JSGlobalObject, JSC.JSValue) callconv(JSC.conv) void;
+extern fn TextDecoderPrototype__encodingGetCachedValue(JSC.JSValue) callconv(JSC.conv) JSC.JSValue;
+
+/// `TextDecoder.encoding` setter
+/// This value will be visited by the garbage collector.
+pub fn encodingSetCached(thisValue: JSC.JSValue, globalObject: *JSC.JSGlobalObject, value: JSC.JSValue) void {
+    JSC.markBinding(@src());
+    TextDecoderPrototype__encodingSetCachedValue(thisValue, globalObject, value);
+}
+
+/// `TextDecoder.encoding` getter
+/// This value will be visited by the garbage collector.
+pub fn encodingGetCached(thisValue: JSC.JSValue) ?JSC.JSValue {
+    JSC.markBinding(@src());
+    const result = TextDecoderPrototype__encodingGetCachedValue(thisValue);
+    if (result == .zero)
+        return null;
+
+    return result;
+}
+```
+
+### Benefits of GC-Owned Values
+
+This system provides several key benefits:
+
+1. **Automatic Memory Management**: The JavaScriptCore GC tracks and manages these values
+2. **Proper Garbage Collection**: The WriteBarrier ensures values are properly visited during GC
+3. **Consistent Access**: Zig code can easily get/set these cached JS values
+4. **Performance**: Cached values avoid repeated computation or serialization  
+
+### Use Cases
+
+GC-owned cached values are particularly useful for:
+
+1. **Computed Properties**: Store expensive computation results
+2. **Lazily Created Objects**: Create objects only when needed, then cache them
+3. **References to Other Objects**: Store references to other JS objects that need GC tracking
+4. **Memoization**: Cache results based on input parameters
+
+The WriteBarrier mechanism ensures that any JS values stored in this way are properly tracked by the garbage collector.
+
+## Memory Management and Finalization
+
+The binding system handles memory management across the JavaScript/Zig boundary:
+
+1. **Object Creation**: JavaScript `new TextDecoder()` creates both a JS wrapper and a Zig struct
+2. **Reference Tracking**: JSC's GC tracks all JS references to the object
+3. **Finalization**: When the JS object is collected, the finalizer releases Zig resources
+
+Bun uses a consistent pattern for resource cleanup:
+
+```zig
+// Resource cleanup method - separate from finalization
+pub fn deinit(this: *TextDecoder) void {
+    // Release resources like strings
+    this._encoding.deref(); // String deref pattern
+    
+    // Free any buffers
+    if (this.buffer) |buffer| {
+        bun.default_allocator.free(buffer);
+    }
+}
+
+// Called by the GC when object is collected
+pub fn finalize(this: *TextDecoder) void {
+    JSC.markBinding(@src()); // For debugging
+    this.deinit(); // Clean up resources
+    bun.default_allocator.destroy(this); // Free the object itself
+}
+```
+
+Some objects that hold references to other JS objects use `.deref()` instead:
+
+```zig
+pub fn finalize(this: *SocketAddress) void {
+    JSC.markBinding(@src());
+    this._presentation.deref(); // Release references
+    this.destroy();
+}
+```
+
+## Error Handling with JSError
+
+Bun uses `bun.JSError!JSValue` return type for proper error handling:
+
+```zig
+pub fn decode(
+    this: *TextDecoder, 
+    globalObject: *JSGlobalObject,
+    callFrame: *JSC.CallFrame
+) bun.JSError!JSC.JSValue {
+    // Throwing an error
+    if (callFrame.argumentCount() < 1) {
+        return globalObject.throw("Missing required argument", .{});
+    }
+    
+    // Or returning a success value
+    return JSC.JSValue.jsString(globalObject, "Success!");
+}
+```
+
+This pattern allows Zig functions to:
+1. Return JavaScript values on success
+2. Throw JavaScript exceptions on error
+3. Propagate errors automatically through the call stack
+
+## Type Safety and Error Handling
+
+The binding system includes robust error handling:
+
+```cpp
+// Example of type checking in generated code
+JSTextDecoder* thisObject = jsDynamicCast<JSTextDecoder*>(callFrame->thisValue());
+if (UNLIKELY(!thisObject)) {
+    scope.throwException(lexicalGlobalObject, 
+        Bun::createInvalidThisError(lexicalGlobalObject, callFrame->thisValue(), "TextDecoder"_s));
+    return {};
+}
+```
+
+## Prototypal Inheritance
+
+The binding system creates proper JavaScript prototype chains:
+
+1. **Constructor**: JSTextDecoderConstructor with standard .prototype property
+2. **Prototype**: JSTextDecoderPrototype with methods and properties
+3. **Instances**: Each JSTextDecoder instance with __proto__ pointing to prototype
+
+This ensures JavaScript inheritance works as expected:
+
+```cpp
+// From generated code
+void JSTextDecoderConstructor::finishCreation(VM& vm, JSC::JSGlobalObject* globalObject, JSTextDecoderPrototype* prototype)
+{
+    Base::finishCreation(vm, 0, "TextDecoder"_s, PropertyAdditionMode::WithoutStructureTransition);
+    
+    // Set up the prototype chain
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
+    ASSERT(inherits(info()));
+}
+```
+
+## Performance Considerations
+
+The binding system is optimized for performance:
+
+1. **Direct Pointer Access**: JavaScript objects maintain a direct pointer to Zig objects
+2. **Property Caching**: WriteBarrier caching avoids repeated native calls for stable properties 
+3. **Memory Management**: JSC garbage collection integrated with Zig memory management
+4. **Type Conversion**: Fast paths for common JavaScript/Zig type conversions
+
+## Creating a New Class Binding
+
+To create a new class binding in Bun:
+
+1. **Define the class interface** in a `.classes.ts` file:
+   ```typescript
+   define({
+     name: "MyClass",
+     constructor: true,
+     finalize: true,
+     proto: {
+       myMethod: {
+         args: 1,
+       },
+       myProperty: {
+         getter: true,
+         cache: true,
+       }
+     }
+   });
+   ```
+
+2. **Implement the native functionality** in a `.zig` file:
+   ```zig
+   pub const MyClass = struct {
+       // State
+       value: []const u8,
+       
+       // Generated bindings
+       pub usingnamespace JSC.Codegen.JSMyClass;
+       pub usingnamespace bun.New(@This());
+       
+       // Constructor
+       pub fn constructor(
+           globalObject: *JSGlobalObject,
+           callFrame: *JSC.CallFrame,
+       ) bun.JSError!*MyClass {
+           const arg = callFrame.argument(0);
+           // Implementation
+       }
+       
+       // Method
+       pub fn myMethod(
+           this: *MyClass,
+           globalObject: *JSGlobalObject,
+           callFrame: *JSC.CallFrame,
+       ) bun.JSError!JSC.JSValue {
+           // Implementation
+       }
+       
+       // Getter
+       pub fn getMyProperty(this: *MyClass, globalObject: *JSGlobalObject) JSC.JSValue {
+           return JSC.JSValue.jsString(globalObject, this.value);
+       }
+       
+       // Resource cleanup
+       pub fn deinit(this: *MyClass) void {
+           // Clean up resources
+       }
+       
+       pub fn finalize(this: *MyClass) void {
+           this.deinit();
+           bun.default_allocator.destroy(this);
+       }
+   };
+   ```
+
+3. **The binding generator** creates all necessary C++ and Zig glue code to connect JavaScript and Zig, including:
+   - C++ class definitions
+   - Method and property bindings
+   - Memory management utilities
+   - GC integration code
+
+## Generated Code Structure
+
+The binding generator produces several components:
+
+### 1. C++ Classes
+
+For each Zig class, the system generates:
+
+- **JS<Class>**: Main wrapper that holds a pointer to the Zig object (`JSTextDecoder`)
+- **JS<Class>Prototype**: Contains methods and properties (`JSTextDecoderPrototype`)
+- **JS<Class>Constructor**: Implementation of the JavaScript constructor (`JSTextDecoderConstructor`)
+
+### 2. C++ Methods and Properties
+
+- **Method Callbacks**: `TextDecoderPrototype__decodeCallback`
+- **Property Getters/Setters**: `TextDecoderPrototype__encodingGetterWrap`
+- **Initialization Functions**: `finishCreation` methods for setting up the class
+
+### 3. Zig Bindings
+
+- **External Function Declarations**:
+  ```zig
+  extern fn TextDecoderPrototype__decode(*TextDecoder, *JSC.JSGlobalObject, *JSC.CallFrame) callconv(JSC.conv) JSC.EncodedJSValue;
+  ```
+
+- **Cached Value Accessors**:
+  ```zig
+  pub fn encodingGetCached(thisValue: JSC.JSValue) ?JSC.JSValue { ... }
+  pub fn encodingSetCached(thisValue: JSC.JSValue, globalObject: *JSC.JSGlobalObject, value: JSC.JSValue) void { ... }
+  ```
+
+- **Constructor Helpers**:
+  ```zig
+  pub fn create(globalObject: *JSC.JSGlobalObject) bun.JSError!JSC.JSValue { ... }
+  ```
+
+### 4. GC Integration
+
+- **Memory Cost Calculation**: `estimatedSize` method
+- **Child Visitor Methods**: `visitChildrenImpl` and `visitAdditionalChildren`
+- **Heap Analysis**: `analyzeHeap` for debugging memory issues
+
+This architecture makes it possible to implement high-performance native functionality in Zig while exposing a clean, idiomatic JavaScript API to users.

.github/pull_request_template.md

@@ -28,7 +28,7 @@ This adds a new flag --bail to bun test. When set, it will stop running tests af
 
 - [ ] I checked the lifetime of memory allocated to verify it's (1) freed and (2) only freed when it should be
 - [ ] I included a test for the new code, or an existing test covers it
-- [ ] JSValue used outside outside of the stack is either wrapped in a JSC.Strong or is JSValueProtect'ed
+- [ ] JSValue used outside of the stack is either wrapped in a JSC.Strong or is JSValueProtect'ed
 - [ ] I wrote TypeScript/JavaScript tests and they pass locally (`bun-debug test test-file-name.test`)
 -->
 

.github/workflows/clang-format.yml

@@ -11,8 +11,8 @@ on:
 
 env:
   BUN_VERSION: "1.2.0"
-  LLVM_VERSION: "18.1.8"
-  LLVM_VERSION_MAJOR: "18"
+  LLVM_VERSION: "19.1.7"
+  LLVM_VERSION_MAJOR: "19"
 
 jobs:
   clang-format:

.github/workflows/clang-tidy.yml

@@ -11,8 +11,8 @@ on:
 
 env:
   BUN_VERSION: "1.2.0"
-  LLVM_VERSION: "18.1.8"
-  LLVM_VERSION_MAJOR: "18"
+  LLVM_VERSION: "19.1.7"
+  LLVM_VERSION_MAJOR: "19"
 
 jobs:
   clang-tidy:

.github/workflows/packages-ci.yml

@@ -0,0 +1,55 @@
+name: Packages CI
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "packages/**"
+      - .prettierrc
+      - .prettierignore
+      - tsconfig.json
+      - oxlint.json
+      - "!**/*.md"
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "packages/**"
+      - .prettierrc
+      - .prettierignore
+      - tsconfig.json
+      - oxlint.json
+      - "!**/*.md"
+
+env:
+  BUN_VERSION: "canary"
+
+jobs:
+  bun-plugin-svelte:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Bun
+        uses: ./.github/actions/setup-bun
+        with:
+          bun-version: ${{ env.BUN_VERSION }}
+
+      - name: Install dependencies
+        run: |
+          bun install
+          pushd ./packages/bun-plugin-svelte && bun install
+
+      - name: Lint
+        run: |
+          bunx oxlint@0.15 --format github --deny-warnings
+          bunx prettier --config ../../.prettierrc --check .
+        working-directory: ./packages/bun-plugin-svelte
+
+      - name: Check types
+        run: bun check:types
+        working-directory: ./packages/bun-plugin-svelte
+
+      - name: Test
+        run: bun test
+        working-directory: ./packages/bun-plugin-svelte

.github/workflows/run-lint.yml

@@ -3,7 +3,6 @@ name: Lint
 permissions:
   contents: read
 env:
-  LLVM_VERSION: 16
   BUN_VERSION: "1.2.0"
 
 on:

.github/workflows/update-cares.yml

@@ -89,4 +89,6 @@ jobs:
 
             Updates c-ares to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/c-ares/c-ares/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-cares.yml)

.github/workflows/update-libarchive.yml

@@ -89,4 +89,6 @@ jobs:
 
             Updates libarchive to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/libarchive/libarchive/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-libarchive.yml)

.github/workflows/update-libdeflate.yml

@@ -89,4 +89,6 @@ jobs:
 
             Updates libdeflate to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/ebiggers/libdeflate/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-libdeflate.yml)

.github/workflows/update-lolhtml.yml

@@ -89,4 +89,6 @@ jobs:
 
             Updates lolhtml to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/cloudflare/lol-html/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-lolhtml.yml)

.github/workflows/update-lshpack.yml

@@ -89,4 +89,6 @@ jobs:
 
             Updates lshpack to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/litespeedtech/ls-hpack/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-lshpack.yml)

.github/workflows/update-root-certs.yml

@@ -0,0 +1,82 @@
+name: Daily Root Certs Update Check
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Runs at 00:00 UTC every day
+  workflow_dispatch: # Allows manual trigger
+
+jobs:
+  check-and-update:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+
+      - name: Generate root certs and capture output
+        id: generate-certs
+        run: |
+          cd packages/bun-usockets/
+          OUTPUT=$(bun generate-root-certs.mjs -v)
+          echo "cert_output<<EOF" >> $GITHUB_ENV
+          echo "$OUTPUT" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+
+      - name: Check for changes and stage files
+        id: check-changes
+        run: |
+          if [[ -n "$(git status --porcelain)" ]]; then
+            echo "Found changes, staging modified files..."
+            git config --global user.name "github-actions[bot]"
+            git config --global user.email "github-actions[bot]@users.noreply.github.com"
+            
+            # Get list of modified files and add them
+            git status --porcelain | while read -r status file; do
+              # Remove leading status and whitespace
+              file=$(echo "$file" | sed 's/^.* //')
+              echo "Adding changed file: $file"
+              git add "$file"
+            done
+            
+            echo "changes=true" >> $GITHUB_OUTPUT
+            
+            # Store the list of changed files
+            CHANGED_FILES=$(git status --porcelain)
+            echo "changed_files<<EOF" >> $GITHUB_ENV
+            echo "$CHANGED_FILES" >> $GITHUB_ENV
+            echo "EOF" >> $GITHUB_ENV
+          else
+            echo "No changes detected"
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create Pull Request
+        if: steps.check-changes.outputs.changes == 'true'
+        uses: peter-evans/create-pull-request@v5
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "update(root_certs): Update root certificates $(date +'%Y-%m-%d')"
+          title: "update(root_certs) $(date +'%Y-%m-%d')"
+          body: |
+            Automated root certificates update
+
+            ${{ env.cert_output }}
+
+            ## Changed Files:
+            ```
+            ${{ env.changed_files }}
+            ```
+          branch: certs/update-root-certs-${{ github.run_number }}
+          base: main
+          delete-branch: true
+          labels:
+            - "automation"
+            - "root-certs"

.github/workflows/update-sqlite3.yml

@@ -106,4 +106,6 @@ jobs:
 
             Updates SQLite to version ${{ steps.check-version.outputs.latest }}
 
+            Compare: https://sqlite.org/src/vdiff?from=${{ steps.check-version.outputs.current }}&to=${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-sqlite3.yml)

.lldbinit

@@ -1,4 +1,16 @@
-# command script import vendor/zig/tools/lldb_pretty_printers.py
-command script import vendor/WebKit/Tools/lldb/lldb_webkit.py
+# Tell LLDB what to do when the debugged process receives SIGPWR: pass it through to the process
+# (-p), but do not stop the process (-s) or notify the user (-n).
+#
+# JSC's garbage collector sends this signal (as configured by Bun WebKit in
+# Thread::initializePlatformThreading() in ThreadingPOSIX.cpp) to the JS thread to suspend or resume
+# it. So stopping the process would just create noise when debugging any long-running script.
+process handle -p true -s false -n false SIGPWR
 
-# type summary add --summary-string "${var} | inner=${var[0-30]}, source=${var[33-64]}, tag=${var[31-32]}" "unsigned long"
+command script import misctools/lldb/lldb_pretty_printers.py
+type category enable zig.lang
+type category enable zig.std
+
+command script import misctools/lldb/lldb_webkit.py
+
+command script delete btjs
+command alias btjs p {printf("gathering btjs trace...\n");printf("%s\n", (char*)dumpBtjsTrace())}

.vscode/launch.json

@@ -22,7 +22,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -38,7 +37,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -60,7 +58,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -76,7 +73,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -92,7 +88,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -108,7 +103,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -125,7 +119,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -147,7 +140,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -169,7 +161,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -188,7 +179,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -203,7 +193,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -221,7 +210,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -236,7 +224,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -253,7 +240,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -275,7 +261,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -297,7 +282,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -313,7 +297,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -329,7 +312,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -345,7 +327,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -361,7 +342,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -378,7 +358,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -400,7 +379,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -421,7 +399,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     // bun test [*]
     {
@@ -437,7 +414,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -452,7 +428,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -468,7 +443,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -488,7 +462,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -503,7 +476,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     // Windows: bun test [file]
     {
@@ -1129,7 +1101,24 @@
       ],
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
+    },
+    {
+      "type": "bun",
+      "name": "[JS] bun test [file]",
+      "runtime": "${workspaceFolder}/build/debug/bun-debug",
+      "runtimeArgs": ["test", "${file}"],
+      "cwd": "${workspaceFolder}",
+      "env": {
+        "BUN_DEBUG_QUIET_LOGS": "1",
+        "BUN_GARBAGE_COLLECTOR_LEVEL": "2",
+      },
+    },
+    {
+      "type": "midas-rr",
+      "request": "attach",
+      "name": "rr",
+      "trace": "Off",
+      "setupCommands": ["handle SIGPWR nostop noprint pass"],
     },
   ],
   "inputs": [

.vscode/settings.json

@@ -141,9 +141,11 @@
     "packages/bun-uws/fuzzing": true,
   },
   "files.associations": {
+    "*.css": "tailwindcss",
     "*.idl": "cpp",
     "*.mdc": "markdown",
     "array": "cpp",
+    "ios": "cpp",
   },
   "C_Cpp.files.exclude": {
     "**/.vscode": true,

CONTRIBUTING.md

@@ -53,39 +53,39 @@ $ brew install bun
 
 ## Install LLVM
 
-Bun requires LLVM 18 (`clang` is part of LLVM). This version requirement is to match WebKit (precompiled), as mismatching versions will cause memory allocation failures at runtime. In most cases, you can install LLVM through your system package manager:
+Bun requires LLVM 19 (`clang` is part of LLVM). This version requirement is to match WebKit (precompiled), as mismatching versions will cause memory allocation failures at runtime. In most cases, you can install LLVM through your system package manager:
 
 {% codetabs group="os" %}
 
 ```bash#macOS (Homebrew)
-$ brew install llvm@18
+$ brew install llvm@19
 ```
 
 ```bash#Ubuntu/Debian
 $ # LLVM has an automatic installation script that is compatible with all versions of Ubuntu
-$ wget https://apt.llvm.org/llvm.sh -O - | sudo bash -s -- 18 all
+$ wget https://apt.llvm.org/llvm.sh -O - | sudo bash -s -- 19 all
 ```
 
 ```bash#Arch
-$ sudo pacman -S llvm clang18 lld
+$ sudo pacman -S llvm clang lld
 ```
 
 ```bash#Fedora
-$ sudo dnf install llvm18 clang18 lld18-devel
+$ sudo dnf install llvm clang lld-devel
 ```
 
 ```bash#openSUSE Tumbleweed
-$ sudo zypper install clang18 lld18 llvm18
+$ sudo zypper install clang19 lld19 llvm19
 ```
 
 {% /codetabs %}
 
-If none of the above solutions apply, you will have to install it [manually](https://github.com/llvm/llvm-project/releases/tag/llvmorg-18.1.8).
+If none of the above solutions apply, you will have to install it [manually](https://github.com/llvm/llvm-project/releases/tag/llvmorg-19.1.7).
 
-Make sure Clang/LLVM 18 is in your path:
+Make sure Clang/LLVM 19 is in your path:
 
 ```bash
-$ which clang-18
+$ which clang-19
 ```
 
 If not, run this to manually add it:
@@ -94,13 +94,13 @@ If not, run this to manually add it:
 
 ```bash#macOS (Homebrew)
 # use fish_add_path if you're using fish
-# use path+="$(brew --prefix llvm@18)/bin" if you are using zsh
-$ export PATH="$(brew --prefix llvm@18)/bin:$PATH"
+# use path+="$(brew --prefix llvm@19)/bin" if you are using zsh
+$ export PATH="$(brew --prefix llvm@19)/bin:$PATH"
 ```
 
 ```bash#Arch
 # use fish_add_path if you're using fish
-$ export PATH="$PATH:/usr/lib/llvm18/bin"
+$ export PATH="$PATH:/usr/lib/llvm19/bin"
 ```
 
 {% /codetabs %}
@@ -134,6 +134,16 @@ We recommend adding `./build/debug` to your `$PATH` so that you can run `bun-deb
 $ bun-debug
 ```
 
+## Running debug builds
+
+The `bd` package.json script compiles and runs a debug build of Bun, only printing the output of the build process if it fails.
+
+```sh
+$ bun bd <args>
+$ bun bd test foo.test.ts
+$ bun bd ./foo.ts
+```
+
 ## Code generation scripts
 
 Several code generation scripts are used during Bun's build process. These are run automatically when changes are made to certain files.
@@ -205,18 +215,30 @@ WebKit is not cloned by default (to save time and disk space). To clone and buil
 # Clone WebKit into ./vendor/WebKit
 $ git clone https://github.com/oven-sh/WebKit vendor/WebKit
 
+# Check out the commit hash specified in `set(WEBKIT_VERSION <commit_hash>)` in cmake/tools/SetupWebKit.cmake
+$ git -C vendor/WebKit checkout <commit_hash>
+
 # Make a debug build of JSC. This will output build artifacts in ./vendor/WebKit/WebKitBuild/Debug
 # Optionally, you can use `make jsc` for a release build
-$ make jsc-debug
+$ make jsc-debug && rm vendor/WebKit/WebKitBuild/Debug/JavaScriptCore/DerivedSources/inspector/InspectorProtocolObjects.h
 
 # Build bun with the local JSC build
 $ bun run build:local
 ```
 
+Using `bun run build:local` will build Bun in the `./build/debug-local` directory (instead of `./build/debug`), you'll have to change a couple of places to use this new directory:
+
+- The first line in [`src/js/builtins.d.ts`](/src/js/builtins.d.ts)
+- The `CompilationDatabase` line in [`.clangd` config](/.clangd) should be `CompilationDatabase: build/debug-local`
+- In [`build.zig`](/build.zig), the `codegen_path` option should be `build/debug-local/codegen` (instead of `build/debug/codegen`)
+- In [`.vscode/launch.json`](/.vscode/launch.json), many configurations use `./build/debug/`, change them as you see fit
+
 Note that the WebKit folder, including build artifacts, is 8GB+ in size.
 
 If you are using a JSC debug build and using VScode, make sure to run the `C/C++: Select a Configuration` command to configure intellisense to find the debug headers.
 
+Note that if you change make changes to our [WebKit fork](https://github.com/oven-sh/WebKit), you will also have to change [`SetupWebKit.cmake`](/cmake/tools/SetupWebKit.cmake) to point to the commit hash.
+
 ## Troubleshooting
 
 ### 'span' file not found on Ubuntu
@@ -238,7 +260,7 @@ The issue may manifest when initially running `bun setup` as Clang being unable
 ```
 The C++ compiler
 
-  "/usr/bin/clang++-18"
+  "/usr/bin/clang++-19"
 
 is not able to compile a simple test program.
 ```

LATEST

@@ -1 +1 @@
-1.2.4
+1.2.7

Makefile

@@ -91,9 +91,9 @@ ZIG ?= $(shell which zig 2>/dev/null || echo -e "error: Missing zig. Please make
 # This is easier to happen than you'd expect.
 # Using realpath here causes issues because clang uses clang++ as a symlink
 # so if that's resolved, it won't build for C++
-REAL_CC = $(shell which clang-18 2>/dev/null || which clang 2>/dev/null)
-REAL_CXX = $(shell which clang++-18 2>/dev/null || which clang++ 2>/dev/null)
-CLANG_FORMAT = $(shell which clang-format-18 2>/dev/null || which clang-format 2>/dev/null)
+REAL_CC = $(shell which clang-19 2>/dev/null || which clang 2>/dev/null)
+REAL_CXX = $(shell which clang++-19 2>/dev/null || which clang++ 2>/dev/null)
+CLANG_FORMAT = $(shell which clang-format-19 2>/dev/null || which clang-format 2>/dev/null)
 
 CC = $(REAL_CC)
 CXX = $(REAL_CXX)
@@ -117,14 +117,14 @@ CC_WITH_CCACHE = $(CCACHE_PATH) $(CC)
 ifeq ($(OS_NAME),darwin)
 # Find LLVM
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
-		LLVM_PREFIX = $(shell brew --prefix llvm@18)
+		LLVM_PREFIX = $(shell brew --prefix llvm@19)
 	endif
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
 		LLVM_PREFIX = $(shell brew --prefix llvm)
 	endif
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
 #   This is kinda ugly, but I can't find a better way to error :(
-		LLVM_PREFIX = $(shell echo -e "error: Unable to find llvm. Please run 'brew install llvm@18' or set LLVM_PREFIX=/path/to/llvm")
+		LLVM_PREFIX = $(shell echo -e "error: Unable to find llvm. Please run 'brew install llvm@19' or set LLVM_PREFIX=/path/to/llvm")
 	endif
 
 	LDFLAGS += -L$(LLVM_PREFIX)/lib
@@ -164,7 +164,7 @@ CMAKE_FLAGS_WITHOUT_RELEASE = -DCMAKE_C_COMPILER=$(CC) \
 	-DCMAKE_OSX_DEPLOYMENT_TARGET=$(MIN_MACOS_VERSION) \
 	$(CMAKE_CXX_COMPILER_LAUNCHER_FLAG) \
 	-DCMAKE_AR=$(AR) \
-	-DCMAKE_RANLIB=$(which llvm-18-ranlib 2>/dev/null || which llvm-ranlib 2>/dev/null) \
+	-DCMAKE_RANLIB=$(which llvm-19-ranlib 2>/dev/null || which llvm-ranlib 2>/dev/null) \
 	-DCMAKE_CXX_STANDARD=20 \
 	-DCMAKE_C_STANDARD=17 \
 	-DCMAKE_CXX_STANDARD_REQUIRED=ON \
@@ -191,7 +191,7 @@ endif
 
 ifeq ($(OS_NAME),linux)
 LIBICONV_PATH =
-AR = $(shell which llvm-ar-18 2>/dev/null || which llvm-ar 2>/dev/null || which ar 2>/dev/null)
+AR = $(shell which llvm-ar-19 2>/dev/null || which llvm-ar 2>/dev/null || which ar 2>/dev/null)
 endif
 
 OPTIMIZATION_LEVEL=-O3 $(MARCH_NATIVE)
@@ -255,7 +255,7 @@ DEFAULT_LINKER_FLAGS= -pthread -ldl
 endif
 ifeq ($(OS_NAME),darwin)
     _MIMALLOC_OBJECT_FILE = 0
-	JSC_BUILD_STEPS += jsc-build-mac jsc-copy-headers
+	JSC_BUILD_STEPS += jsc-build-mac
 	JSC_BUILD_STEPS_DEBUG += jsc-build-mac-debug
 	_MIMALLOC_FILE = libmimalloc.a
 	_MIMALLOC_INPUT_PATH = libmimalloc.a
@@ -286,7 +286,7 @@ STRIP=/usr/bin/strip
 endif
 
 ifeq ($(OS_NAME),linux)
-STRIP=$(shell which llvm-strip 2>/dev/null || which llvm-strip-18 2>/dev/null || which strip 2>/dev/null || echo "Missing strip")
+STRIP=$(shell which llvm-strip 2>/dev/null || which llvm-strip-19 2>/dev/null || which strip 2>/dev/null || echo "Missing strip")
 endif
 
 
@@ -674,7 +674,7 @@ endif
 .PHONY: assert-deps
 assert-deps:
 	@echo "Checking if the required utilities are available..."
-	@if [ $(CLANG_VERSION) -lt "18" ]; then echo -e "ERROR: clang version >=18 required, found: $(CLANG_VERSION). Install with:\n\n    $(POSIX_PKG_MANAGER) install llvm@18"; exit 1; fi
+	@if [ $(CLANG_VERSION) -lt "19" ]; then echo -e "ERROR: clang version >=19 required, found: $(CLANG_VERSION). Install with:\n\n    $(POSIX_PKG_MANAGER) install llvm@19"; exit 1; fi
 	@cmake --version >/dev/null 2>&1 || (echo -e "ERROR: cmake is required."; exit 1)
 	@$(PYTHON) --version >/dev/null 2>&1 || (echo -e "ERROR: python is required."; exit 1)
 	@$(ESBUILD) --version >/dev/null 2>&1 || (echo -e "ERROR: esbuild is required."; exit 1)
@@ -924,7 +924,7 @@ bun-codesign-release-local-debug:
 
 
 .PHONY: jsc
-jsc: jsc-build jsc-copy-headers jsc-bindings
+jsc: jsc-build
 .PHONY: jsc-debug
 jsc-debug: jsc-build-debug
 .PHONY: jsc-build

bench/crypto/aes-gcm-throughput.mjs

@@ -0,0 +1,44 @@
+import { bench, run } from "../runner.mjs";
+import crypto from "node:crypto";
+import { Buffer } from "node:buffer";
+
+const keylen = { "aes-128-gcm": 16, "aes-192-gcm": 24, "aes-256-gcm": 32 };
+const sizes = [4 * 1024, 1024 * 1024];
+const ciphers = ["aes-128-gcm", "aes-192-gcm", "aes-256-gcm"];
+
+const messages = {};
+sizes.forEach(size => {
+  messages[size] = Buffer.alloc(size, "b");
+});
+
+const keys = {};
+ciphers.forEach(cipher => {
+  keys[cipher] = crypto.randomBytes(keylen[cipher]);
+});
+
+// Fixed IV and AAD
+const iv = crypto.randomBytes(12);
+const associate_data = Buffer.alloc(16, "z");
+
+for (const cipher of ciphers) {
+  for (const size of sizes) {
+    const message = messages[size];
+    const key = keys[cipher];
+
+    bench(`${cipher} ${size / 1024}KB`, () => {
+      const alice = crypto.createCipheriv(cipher, key, iv);
+      alice.setAAD(associate_data);
+      const enc = alice.update(message);
+      alice.final();
+      const tag = alice.getAuthTag();
+
+      const bob = crypto.createDecipheriv(cipher, key, iv);
+      bob.setAuthTag(tag);
+      bob.setAAD(associate_data);
+      bob.update(enc);
+      bob.final();
+    });
+  }
+}
+
+await run();

bench/crypto/diffie-hellman.mjs

@@ -0,0 +1,53 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+// Pre-generate DH params to avoid including setup in benchmarks
+const dhSize = 1024; // Reduced from 2048 for faster testing
+const dh = crypto.createDiffieHellman(dhSize);
+const dhPrime = dh.getPrime();
+const dhGenerator = dh.getGenerator();
+
+// Classical Diffie-Hellman
+bench("DH - generateKeys", () => {
+  const alice = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  return alice.generateKeys();
+});
+
+bench("DH - computeSecret", () => {
+  // Setup
+  const alice = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  const bobKey = bob.generateKeys();
+
+  // Benchmark just the secret computation
+  return alice.computeSecret(bobKey);
+});
+
+// ECDH with prime256v1 (P-256)
+bench("ECDH-P256 - generateKeys", () => {
+  const ecdh = crypto.createECDH("prime256v1");
+  return ecdh.generateKeys();
+});
+
+bench("ECDH-P256 - computeSecret", () => {
+  // Setup
+  const alice = crypto.createECDH("prime256v1");
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createECDH("prime256v1");
+  const bobKey = bob.generateKeys();
+
+  // Benchmark just the secret computation
+  return alice.computeSecret(bobKey);
+});
+
+// ECDH with secp384r1 (P-384)
+bench("ECDH-P384 - computeSecret", () => {
+  const alice = crypto.createECDH("secp384r1");
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createECDH("secp384r1");
+  const bobKey = bob.generateKeys();
+  return alice.computeSecret(bobKey);
+});
+
+await run();

bench/crypto/ecdh-convert-key.mjs

@@ -0,0 +1,44 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+function generateTestKeyPairs() {
+  const curves = crypto.getCurves();
+  const keys = {};
+
+  for (const curve of curves) {
+    const ecdh = crypto.createECDH(curve);
+    ecdh.generateKeys();
+
+    keys[curve] = {
+      compressed: ecdh.getPublicKey("hex", "compressed"),
+      uncompressed: ecdh.getPublicKey("hex", "uncompressed"),
+      instance: ecdh,
+    };
+  }
+
+  return keys;
+}
+
+const testKeys = generateTestKeyPairs();
+
+bench("ECDH key format - P256 compressed to uncompressed", () => {
+  const publicKey = testKeys["prime256v1"].compressed;
+  return crypto.ECDH.convertKey(publicKey, "prime256v1", "hex", "hex", "uncompressed");
+});
+
+bench("ECDH key format - P256 uncompressed to compressed", () => {
+  const publicKey = testKeys["prime256v1"].uncompressed;
+  return crypto.ECDH.convertKey(publicKey, "prime256v1", "hex", "hex", "compressed");
+});
+
+bench("ECDH key format - P384 compressed to uncompressed", () => {
+  const publicKey = testKeys["secp384r1"].compressed;
+  return crypto.ECDH.convertKey(publicKey, "secp384r1", "hex", "hex", "uncompressed");
+});
+
+bench("ECDH key format - P384 uncompressed to compressed", () => {
+  const publicKey = testKeys["secp384r1"].uncompressed;
+  return crypto.ECDH.convertKey(publicKey, "secp384r1", "hex", "hex", "compressed");
+});
+
+await run();

bench/crypto/hkdf.mjs

@@ -0,0 +1,50 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+// Sample keys with different lengths
+const keys = {
+  short: "secret",
+  long: "this-is-a-much-longer-secret-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+};
+
+// Test parameters
+const salts = ["", "salt"];
+const infos = ["", "info"];
+const hashes = ["sha256", "sha512"];
+const sizes = [10, 1024];
+
+// Benchmark sync HKDF
+for (const hash of hashes) {
+  for (const keyName of Object.keys(keys)) {
+    const key = keys[keyName];
+    for (const size of sizes) {
+      bench(`hkdfSync ${hash} ${keyName}-key ${size} bytes`, () => {
+        return crypto.hkdfSync(hash, key, "salt", "info", size);
+      });
+    }
+  }
+}
+
+// Benchmark different combinations of salt and info
+for (const salt of salts) {
+  for (const info of infos) {
+    bench(`hkdfSync sha256 with ${salt ? "salt" : "no-salt"} and ${info ? "info" : "no-info"}`, () => {
+      return crypto.hkdfSync("sha256", "secret", salt, info, 64);
+    });
+  }
+}
+
+// Benchmark async HKDF (using promises for cleaner benchmark)
+// Note: async benchmarks in Mitata require returning a Promise
+for (const hash of hashes) {
+  bench(`hkdf ${hash} async`, async () => {
+    return new Promise((resolve, reject) => {
+      crypto.hkdf(hash, "secret", "salt", "info", 64, (err, derivedKey) => {
+        if (err) reject(err);
+        else resolve(derivedKey);
+      });
+    });
+  });
+}
+
+await run();

bench/crypto/primes.mjs

@@ -0,0 +1,43 @@
+import { checkPrime, checkPrimeSync, generatePrime, generatePrimeSync } from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+const prime512 = generatePrimeSync(512);
+const prime2048 = generatePrimeSync(2048);
+
+bench("checkPrimeSync 512", () => {
+  return checkPrimeSync(prime512);
+});
+
+bench("checkPrimeSync 2048", () => {
+  return checkPrimeSync(prime2048);
+});
+
+bench("checkPrime 512", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => checkPrime(prime512, resolve)));
+  await Promise.all(promises);
+});
+
+bench("checkPrime 2048", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => checkPrime(prime2048, resolve)));
+  await Promise.all(promises);
+});
+
+bench("generatePrimeSync 512", () => {
+  return generatePrimeSync(512);
+});
+
+bench("generatePrimeSync 2048", () => {
+  return generatePrimeSync(2048);
+});
+
+bench("generatePrime 512", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => generatePrime(512, resolve)));
+  await Promise.all(promises);
+});
+
+bench("generatePrime 2048", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => generatePrime(2048, resolve)));
+  await Promise.all(promises);
+});
+
+await run();

bench/crypto/random.mjs

@@ -0,0 +1,50 @@
+import crypto from "crypto";
+import { bench, run } from "../runner.mjs";
+
+bench("randomInt - sync", () => {
+  crypto.randomInt(1000);
+});
+
+bench("randomInt - async", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomInt(1000, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randonBytes - 32", () => {
+  crypto.randomBytes(32);
+});
+
+bench("randomBytes - 256", () => {
+  crypto.randomBytes(256);
+});
+
+const buf = Buffer.alloc(256);
+
+bench("randomFill - 32", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomFill(buf, 0, 32, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randomFill - 256", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomFill(buf, 0, 256, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randomFillSync - 32", () => {
+  crypto.randomFillSync(buf, 0, 32);
+});
+
+bench("randomFillSync - 256", () => {
+  crypto.randomFillSync(buf, 0, 256);
+});
+
+await run();

bench/express/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     // Enable latest features
-    "lib": ["ESNext", "DOM"],
+    "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
     "moduleDetection": "force",

bench/package.json

@@ -12,6 +12,7 @@
     "eventemitter3": "^5.0.0",
     "execa": "^8.0.1",
     "fast-glob": "3.3.1",
+    "fastify": "^5.0.0",
     "fdir": "^6.1.0",
     "mitata": "^1.0.25",
     "react": "^18.3.1",

bench/postgres/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     // Enable latest features
-    "lib": ["ESNext", "DOM"],
+    "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
     "moduleDetection": "force",

bench/snippets/express-hello.mjs

@@ -0,0 +1,13 @@
+import express from "express";
+
+const app = express();
+const port = 3000;
+
+var i = 0;
+app.get("/", (req, res) => {
+  res.send("Hello World!" + i++);
+});
+
+app.listen(port, () => {
+  console.log(`Express app listening at http://localhost:${port}`);
+});

bench/snippets/fastify.mjs

@@ -0,0 +1,20 @@
+import Fastify from "fastify";
+
+const fastify = Fastify({
+  logger: false,
+});
+
+fastify.get("/", async (request, reply) => {
+  return { hello: "world" };
+});
+
+const start = async () => {
+  try {
+    await fastify.listen({ port: 3000 });
+  } catch (err) {
+    fastify.log.error(err);
+    process.exit(1);
+  }
+};
+
+start();

build.zig

@@ -19,17 +19,17 @@ const OperatingSystem = @import("src/env.zig").OperatingSystem;
 const pathRel = fs.path.relative;
 
 /// Do not rename this constant. It is scanned by some scripts to determine which zig version to install.
-const recommended_zig_version = "0.14.0-dev.2987+183bb8b08";
+const recommended_zig_version = "0.14.0";
 
 comptime {
     if (!std.mem.eql(u8, builtin.zig_version_string, recommended_zig_version)) {
         @compileError(
             "" ++
-                "Bun requires Zig version " ++ recommended_zig_version ++ " (found " ++
-                builtin.zig_version_string ++ "). This is " ++
-                "automatically configured via Bun's CMake setup. You likely meant to run " ++
-                "`bun setup`. If you are trying to upgrade the Zig compiler, " ++
-                "run `./scripts/download-zig.sh master` or comment this message out.",
+                "Bun requires Zig version " ++ recommended_zig_version ++ ", but you have " ++
+                builtin.zig_version_string ++ ". This is automatically configured via Bun's " ++
+                "CMake setup. You likely meant to run `bun run build`. If you are trying to " ++
+                "upgrade the Zig compiler, edit ZIG_COMMIT in cmake/tools/SetupZig.cmake or " ++
+                "comment this error out.",
         );
     }
 }
@@ -319,7 +319,21 @@ pub fn build(b: *Build) !void {
             .{ .os = .linux, .arch = .aarch64 },
             .{ .os = .linux, .arch = .x86_64, .musl = true },
             .{ .os = .linux, .arch = .aarch64, .musl = true },
-        });
+        }, &.{ .Debug, .ReleaseFast });
+    }
+
+    // zig build check-all-debug
+    {
+        const step = b.step("check-all-debug", "Check for semantic analysis errors on all supported platforms in debug mode");
+        addMultiCheck(b, step, build_options, &.{
+            .{ .os = .windows, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64 },
+            .{ .os = .linux, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64, .musl = true },
+            .{ .os = .linux, .arch = .aarch64, .musl = true },
+        }, &.{.Debug});
     }
 
     // zig build check-windows
@@ -327,21 +341,21 @@ pub fn build(b: *Build) !void {
         const step = b.step("check-windows", "Check for semantic analysis errors on Windows");
         addMultiCheck(b, step, build_options, &.{
             .{ .os = .windows, .arch = .x86_64 },
-        });
+        }, &.{ .Debug, .ReleaseFast });
     }
     {
         const step = b.step("check-macos", "Check for semantic analysis errors on Windows");
         addMultiCheck(b, step, build_options, &.{
             .{ .os = .mac, .arch = .x86_64 },
             .{ .os = .mac, .arch = .aarch64 },
-        });
+        }, &.{ .Debug, .ReleaseFast });
     }
     {
         const step = b.step("check-linux", "Check for semantic analysis errors on Windows");
         addMultiCheck(b, step, build_options, &.{
             .{ .os = .linux, .arch = .x86_64 },
             .{ .os = .linux, .arch = .aarch64 },
-        });
+        }, &.{ .Debug, .ReleaseFast });
     }
 
     // zig build translate-c-headers
@@ -369,9 +383,10 @@ pub fn addMultiCheck(
     parent_step: *Step,
     root_build_options: BunBuildOptions,
     to_check: []const struct { os: OperatingSystem, arch: Arch, musl: bool = false },
+    optimize: []const std.builtin.OptimizeMode,
 ) void {
     for (to_check) |check| {
-        for ([_]std.builtin.Mode{ .Debug, .ReleaseFast }) |mode| {
+        for (optimize) |mode| {
             const check_target = b.resolveTargetQuery(.{
                 .os_tag = OperatingSystem.stdOSTag(check.os),
                 .cpu_arch = check.arch,
@@ -419,6 +434,7 @@ fn getTranslateC(b: *Build, target: std.Build.ResolvedTarget, optimize: std.buil
         const str, const value = entry;
         translate_c.defineCMacroRaw(b.fmt("{s}={d}", .{ str, @intFromBool(value) }));
     }
+    translate_c.addIncludePath(b.path("vendor/libarchive"));
     return translate_c;
 }
 

bun.lock

@@ -27,9 +27,10 @@
     },
     "packages/bun-types": {
       "name": "bun-types",
+      "version": "1.2.5",
       "dependencies": {
         "@types/node": "*",
-        "@types/ws": "~8.5.10",
+        "@types/ws": "*",
       },
       "devDependencies": {
         "@biomejs/biome": "^1.5.3",
@@ -151,13 +152,13 @@
 
     "@qiwi/npm-registry-client": ["@qiwi/npm-registry-client@8.9.1", "", { "dependencies": { "concat-stream": "^2.0.0", "graceful-fs": "^4.2.4", "normalize-package-data": "~1.0.1 || ^2.0.0 || ^3.0.0", "npm-package-arg": "^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0 || ^8.0.0", "once": "^1.4.0", "request": "^2.88.2", "retry": "^0.12.0", "safe-buffer": "^5.2.1", "semver": "2 >=2.2.1 || 3.x || 4 || 5 || 7", "slide": "^1.1.6", "ssri": "^8.0.0" }, "optionalDependencies": { "npmlog": "2 || ^3.1.0 || ^4.0.0" } }, "sha512-rZF+mG+NfijR0SHphhTLHRr4aM4gtfdwoAMY6we2VGQam8vkN1cxGG1Lg/Llrj8Dd0Mu6VjdFQRyMMRZxtZR2A=="],
 
-    "@types/bun": ["@types/bun@1.1.17", "", { "dependencies": { "bun-types": "1.1.44" } }, "sha512-zZt0Kao/8hAwNOXh4bmt8nKbMEd4QD8n7PeTGF+NZTVY5ouXhU/TX7jUj4He1p7mgY+WdplnU1B6MB1j17vdzg=="],
+    "@types/bun": ["@types/bun@1.2.2", "", { "dependencies": { "bun-types": "1.2.2" } }, "sha512-tr74gdku+AEDN5ergNiBnplr7hpDp3V1h7fqI2GcR/rsUaM39jpSeKH0TFibRvU0KwniRx5POgaYnaXbk0hU+w=="],
 
     "@types/json-schema": ["@types/json-schema@7.0.15", "", {}, "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA=="],
 
     "@types/json5": ["@types/json5@0.0.29", "", {}, "sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ=="],
 
-    "@types/node": ["@types/node@22.10.7", "", { "dependencies": { "undici-types": "~6.20.0" } }, "sha512-V09KvXxFiutGp6B7XkpaDXlNadZxrzajcY50EuoLIpQ6WWYCSvf19lVIazzfIzQvhUN2HjX12spLojTnhuKlGg=="],
+    "@types/node": ["@types/node@22.13.5", "", { "dependencies": { "undici-types": "~6.20.0" } }, "sha512-+lTU0PxZXn0Dr1NBtC7Y8cR21AJr87dLLU953CWA6pMxxv/UDc7jYAY90upcrie1nRcD6XNG5HOYEDtgW5TxAg=="],
 
     "@types/prop-types": ["@types/prop-types@15.7.12", "", {}, "sha512-5zvhXYtRNRluoE/jAp4GVsSduVUzNWKkOZrCDBWYtE7biZywwdC2AcEzg+cSMLFRfVgeAFqpfNabiPjxFddV1Q=="],
 

bunfig.node-test.toml

@@ -2,3 +2,7 @@
 # https://github.com/oven-sh/bun/issues/16289
 [test]
 preload = ["./test/js/node/harness.ts", "./test/preload.ts"]
+
+[install]
+# Node.js never auto-installs modules.
+auto = "disable"

cmake/Globals.cmake

@@ -419,7 +419,15 @@ function(register_command)
     list(APPEND CMD_EFFECTIVE_OUTPUTS ${artifact})
     if(BUILDKITE)
       file(RELATIVE_PATH filename ${BUILD_PATH} ${artifact})
-      list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload ${filename})
+      if(filename STREQUAL "libbun-profile.a")
+        # libbun-profile.a is now over 5gb in size, compress it first
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} rm -r ${BUILD_PATH}/codegen)
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} rm -r ${CACHE_PATH})
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} gzip -6 libbun-profile.a)
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload libbun-profile.a.gz)
+      else()
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload ${filename})
+      endif()
     endif()
   endforeach()
 

cmake/targets/BuildBoringSSL.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     oven-sh/boringssl
   COMMIT
-    914b005ef3ece44159dca0ffad74eb42a9f6679f
+    7a5d984c69b0c34c4cbb56c6812eaa5b9bef485c
 )
 
 register_cmake_command(

cmake/targets/BuildBun.cmake

@@ -1,8 +1,8 @@
 if(DEBUG)
   set(bun bun-debug)
-elseif(ENABLE_SMOL)
-  set(bun bun-smol-profile)
-  set(bunStrip bun-smol)
+# elseif(ENABLE_SMOL)
+#   set(bun bun-smol-profile)
+#   set(bunStrip bun-smol)
 elseif(ENABLE_VALGRIND)
   set(bun bun-valgrind)
 elseif(ENABLE_ASSERTIONS)
@@ -738,7 +738,7 @@ endif()
 # --- C/C++ Properties ---
 
 set_target_properties(${bun} PROPERTIES
-  CXX_STANDARD 20
+  CXX_STANDARD 23
   CXX_STANDARD_REQUIRED YES
   CXX_EXTENSIONS YES
   CXX_VISIBILITY_PRESET hidden
@@ -747,6 +747,18 @@ set_target_properties(${bun} PROPERTIES
   VISIBILITY_INLINES_HIDDEN YES
 )
 
+if (NOT WIN32)
+  # Enable precompiled headers
+  # Only enable in these scenarios:
+  # 1. NOT in CI, OR
+  # 2. In CI AND BUN_CPP_ONLY is enabled
+  if(NOT CI OR (CI AND BUN_CPP_ONLY))
+    target_precompile_headers(${bun} PRIVATE
+      "$<$<COMPILE_LANGUAGE:CXX>:${CWD}/src/bun.js/bindings/root.h>"
+    )
+  endif()
+endif()
+
 # --- C/C++ Includes ---
 
 if(WIN32)
@@ -773,6 +785,10 @@ target_include_directories(${bun} PRIVATE
   ${NODEJS_HEADERS_PATH}/include
 )
 
+if(NOT WIN32) 
+  target_include_directories(${bun} PRIVATE ${CWD}/src/bun.js/bindings/libuv)
+endif()
+
 if(LINUX)
   include(CheckIncludeFiles)
   check_include_files("sys/queue.h" HAVE_SYS_QUEUE_H)
@@ -901,6 +917,10 @@ if(NOT WIN32)
       -Werror
     )
   endif()
+else()
+  target_compile_options(${bun} PUBLIC
+    -Wno-nullability-completeness
+  )
 endif()
 
 # --- Linker options ---
@@ -943,28 +963,17 @@ endif()
 
 if(LINUX)
   if(NOT ABI STREQUAL "musl")
-  # on arm64
-  if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM|arm64|ARM64|aarch64|AARCH64")
-    target_link_options(${bun} PUBLIC
-      -Wl,--wrap=exp
-      -Wl,--wrap=expf
-      -Wl,--wrap=fcntl64
-      -Wl,--wrap=log
-      -Wl,--wrap=log2
-      -Wl,--wrap=log2f
-      -Wl,--wrap=logf
-      -Wl,--wrap=pow
-      -Wl,--wrap=powf
-    )
-  else()
-    target_link_options(${bun} PUBLIC
-      -Wl,--wrap=exp
-      -Wl,--wrap=expf
-      -Wl,--wrap=log2f
-      -Wl,--wrap=logf
-      -Wl,--wrap=powf
-    )
-  endif()
+  target_link_options(${bun} PUBLIC
+    -Wl,--wrap=exp
+    -Wl,--wrap=expf
+    -Wl,--wrap=fcntl64
+    -Wl,--wrap=log
+    -Wl,--wrap=log2
+    -Wl,--wrap=log2f
+    -Wl,--wrap=logf
+    -Wl,--wrap=pow
+    -Wl,--wrap=powf
+  )
   endif()
 
   if(NOT ABI STREQUAL "musl")

cmake/targets/BuildLibArchive.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     libarchive/libarchive
   COMMIT
-    898dc8319355b7e985f68a9819f182aaed61b53a
+    e31747775b9182d7e08c0ab5115c6861703a5efa
 )
 
 register_cmake_command(

cmake/targets/BuildLolHtml.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     cloudflare/lol-html
   COMMIT
-    4f8becea13a0021c8b71abd2dcc5899384973b66
+    67f1d4ffd6b74db7e053fb129dcce620193c180d
 )
 
 set(LOLHTML_CWD ${VENDOR_PATH}/lolhtml/c-api)

cmake/targets/BuildMimalloc.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     oven-sh/mimalloc
   COMMIT
-    7a4d7b8d18f8159a808aade63eb93ea6abd06924
+    1beadf9651a7bfdec6b5367c380ecc3fe1c40d1a
 )
 
 set(MIMALLOC_CMAKE_ARGS
@@ -31,7 +31,13 @@ if(ENABLE_VALGRIND)
   list(APPEND MIMALLOC_CMAKE_ARGS -DMI_VALGRIND=ON)
 endif()
 
-if(DEBUG)
+if(WIN32)
+  if(DEBUG)
+    set(MIMALLOC_LIBRARY mimalloc-static-debug)
+  else()
+    set(MIMALLOC_LIBRARY mimalloc-static)
+  endif()
+elseif(DEBUG)
   set(MIMALLOC_LIBRARY mimalloc-debug)
 else()
   set(MIMALLOC_LIBRARY mimalloc)

cmake/tools/SetupBuildkite.cmake

@@ -120,6 +120,9 @@ foreach(i RANGE ${BUILDKITE_JOBS_MAX_INDEX})
     endif()
 
     if(BUILDKITE)
+      if(BUILDKITE_ARTIFACT_PATH STREQUAL "libbun-profile.a")
+        set(BUILDKITE_ARTIFACT_PATH libbun-profile.a.gz)
+      endif()
       set(BUILDKITE_DOWNLOAD_COMMAND buildkite-agent artifact download ${BUILDKITE_ARTIFACT_PATH} . --build ${BUILDKITE_BUILD_UUID} --step ${BUILDKITE_JOB_ID})
     else()
       set(BUILDKITE_DOWNLOAD_COMMAND curl -L -o ${BUILDKITE_ARTIFACT_PATH} ${BUILDKITE_ARTIFACTS_URL}/${BUILDKITE_ARTIFACT_ID})
@@ -135,6 +138,20 @@ foreach(i RANGE ${BUILDKITE_JOBS_MAX_INDEX})
       OUTPUT
         ${BUILD_PATH}/${BUILDKITE_ARTIFACT_PATH}
     )
+    if(BUILDKITE_ARTIFACT_PATH STREQUAL "libbun-profile.a.gz")
+      add_custom_command(
+        COMMENT
+          "Unpacking libbun-profile.a.gz"
+        VERBATIM COMMAND
+          gunzip libbun-profile.a.gz
+        WORKING_DIRECTORY
+          ${BUILD_PATH}
+        OUTPUT
+          ${BUILD_PATH}/libbun-profile.a
+        DEPENDS
+          ${BUILD_PATH}/libbun-profile.a.gz
+      )
+    endif()
   endforeach()
 
   list(APPEND BUILDKITE_JOBS_MATCH ${BUILDKITE_JOB_NAME})

cmake/tools/SetupGit.cmake

@@ -36,7 +36,8 @@ endif()
 string(REPLACE "\n" ";" GIT_CHANGED_SOURCES "${GIT_DIFF}")
 
 if(CI)
-  setx(GIT_CHANGED_SOURCES ${GIT_CHANGED_SOURCES})
+  set(GIT_CHANGED_SOURCES "${GIT_CHANGED_SOURCES}")
+  message(STATUS "Set GIT_CHANGED_SOURCES: ${GIT_CHANGED_SOURCES}")
 endif()
 
 list(TRANSFORM GIT_CHANGED_SOURCES PREPEND ${CWD}/)

cmake/tools/SetupLLVM.cmake

@@ -12,7 +12,7 @@ if(NOT ENABLE_LLVM)
   return()
 endif()
 
-set(DEFAULT_LLVM_VERSION "18.1.8")
+set(DEFAULT_LLVM_VERSION "19.1.7")
 
 optionx(LLVM_VERSION STRING "The version of LLVM to use" DEFAULT ${DEFAULT_LLVM_VERSION})
 

cmake/tools/SetupWebKit.cmake

@@ -2,7 +2,7 @@ option(WEBKIT_VERSION "The version of WebKit to use")
 option(WEBKIT_LOCAL "If a local version of WebKit should be used instead of downloading")
 
 if(NOT WEBKIT_VERSION)
-  set(WEBKIT_VERSION f14adff4c39ba08174b84a942f9584028fc9a7ae)
+  set(WEBKIT_VERSION ef31d98a1370e01b7483cabcbe3593d055bea982)
 endif()
 
 string(SUBSTRING ${WEBKIT_VERSION} 0 16 WEBKIT_VERSION_PREFIX)

cmake/tools/SetupZig.cmake

@@ -20,7 +20,7 @@ else()
   unsupported(CMAKE_SYSTEM_NAME)
 endif()
 
-set(ZIG_COMMIT "bb9d6ab2c0bbbf20cc24dad03e88f3b3ffdb7de7")
+set(ZIG_COMMIT "cd1995944508e4c946deb75bd70947d302e0db37")
 optionx(ZIG_TARGET STRING "The zig target to use" DEFAULT ${DEFAULT_ZIG_TARGET})
 
 if(CMAKE_BUILD_TYPE STREQUAL "Release")

docs/api/cookie.md

@@ -0,0 +1,449 @@
+Bun provides native APIs for working with HTTP cookies through `Bun.Cookie` and `Bun.CookieMap`. These APIs offer fast, easy-to-use methods for parsing, generating, and manipulating cookies in HTTP requests and responses.
+
+## CookieMap class
+
+`Bun.CookieMap` provides a Map-like interface for working with collections of cookies. It implements the `Iterable` interface, allowing you to use it with `for...of` loops and other iteration methods.
+
+```ts
+// Empty cookie map
+const cookies = new Bun.CookieMap();
+
+// From a cookie string
+const cookies1 = new Bun.CookieMap("name=value; foo=bar");
+
+// From an object
+const cookies2 = new Bun.CookieMap({
+  session: "abc123",
+  theme: "dark",
+});
+
+// From an array of name/value pairs
+const cookies3 = new Bun.CookieMap([
+  ["session", "abc123"],
+  ["theme", "dark"],
+]);
+```
+
+### In HTTP servers
+
+In Bun's HTTP server, the `cookies` property on the request object (in `routes`) is an instance of `CookieMap`:
+
+```ts
+const server = Bun.serve({
+  routes: {
+    "/": req => {
+      // Access request cookies
+      const cookies = req.cookies;
+
+      // Get a specific cookie
+      const sessionCookie = cookies.get("session");
+      if (sessionCookie != null) {
+        console.log(sessionCookie);
+      }
+
+      // Check if a cookie exists
+      if (cookies.has("theme")) {
+        // ...
+      }
+
+      // Set a cookie, it will be automatically applied to the response
+      cookies.set("visited", "true");
+
+      return new Response("Hello");
+    },
+  },
+});
+
+console.log("Server listening at: " + server.url);
+```
+
+### Methods
+
+#### `get(name: string): string | null`
+
+Retrieves a cookie by name. Returns `null` if the cookie doesn't exist.
+
+```ts
+// Get by name
+const cookie = cookies.get("session");
+
+if (cookie != null) {
+  console.log(cookie);
+}
+```
+
+#### `has(name: string): boolean`
+
+Checks if a cookie with the given name exists.
+
+```ts
+// Check if cookie exists
+if (cookies.has("session")) {
+  // Cookie exists
+}
+```
+
+#### `set(name: string, value: string): void`
+
+#### `set(options: CookieInit): void`
+
+#### `set(cookie: Cookie): void`
+
+Adds or updates a cookie in the map. Cookies default to `{ path: "/", sameSite: "lax" }`.
+
+```ts
+// Set by name and value
+cookies.set("session", "abc123");
+
+// Set using options object
+cookies.set({
+  name: "theme",
+  value: "dark",
+  maxAge: 3600,
+  secure: true,
+});
+
+// Set using Cookie instance
+const cookie = new Bun.Cookie("visited", "true");
+cookies.set(cookie);
+```
+
+#### `delete(name: string): void`
+
+#### `delete(options: CookieStoreDeleteOptions): void`
+
+Removes a cookie from the map. When applied to a Response, this adds a cookie with an empty string value and an expiry date in the past. A cookie will only delete successfully on the browser if the domain and path is the same as it was when the cookie was created.
+
+```ts
+// Delete by name using default domain and path.
+cookies.delete("session");
+
+// Delete with domain/path options.
+cookies.delete({
+  name: "session",
+  domain: "example.com",
+  path: "/admin",
+});
+```
+
+#### `toJSON(): Record<string, string>`
+
+Converts the cookie map to a serializable format.
+
+```ts
+const json = cookies.toJSON();
+```
+
+#### `toSetCookieHeaders(): string[]`
+
+Returns an array of values for Set-Cookie headers that can be used to apply all cookie changes.
+
+When using `Bun.serve()`, you don't need to call this method explicitly. Any changes made to the `req.cookies` map are automatically applied to the response headers. This method is primarily useful when working with other HTTP server implementations.
+
+```js
+import { createServer } from "node:http";
+import { CookieMap } from "bun";
+
+const server = createServer((req, res) => {
+  const cookieHeader = req.headers.cookie || "";
+  const cookies = new CookieMap(cookieHeader);
+
+  cookies.set("view-count", Number(cookies.get("view-count") || "0") + 1);
+  cookies.delete("session");
+
+  res.writeHead(200, {
+    "Content-Type": "text/plain",
+    "Set-Cookie": cookies.toSetCookieHeaders(),
+  });
+  res.end(`Found ${cookies.size} cookies`);
+});
+
+server.listen(3000, () => {
+  console.log("Server running at http://localhost:3000/");
+});
+```
+
+### Iteration
+
+`CookieMap` provides several methods for iteration:
+
+```ts
+// Iterate over [name, cookie] entries
+for (const [name, value] of cookies) {
+  console.log(`${name}: ${value}`);
+}
+
+// Using entries()
+for (const [name, value] of cookies.entries()) {
+  console.log(`${name}: ${value}`);
+}
+
+// Using keys()
+for (const name of cookies.keys()) {
+  console.log(name);
+}
+
+// Using values()
+for (const value of cookies.values()) {
+  console.log(value);
+}
+
+// Using forEach
+cookies.forEach((value, name) => {
+  console.log(`${name}: ${value}`);
+});
+```
+
+### Properties
+
+#### `size: number`
+
+Returns the number of cookies in the map.
+
+```ts
+console.log(cookies.size); // Number of cookies
+```
+
+## Cookie class
+
+`Bun.Cookie` represents an HTTP cookie with its name, value, and attributes.
+
+```ts
+import { Cookie } from "bun";
+
+// Create a basic cookie
+const cookie = new Bun.Cookie("name", "value");
+
+// Create a cookie with options
+const secureSessionCookie = new Bun.Cookie("session", "abc123", {
+  domain: "example.com",
+  path: "/admin",
+  expires: new Date(Date.now() + 86400000), // 1 day
+  httpOnly: true,
+  secure: true,
+  sameSite: "strict",
+});
+
+// Parse from a cookie string
+const parsedCookie = new Bun.Cookie("name=value; Path=/; HttpOnly");
+
+// Create from an options object
+const objCookie = new Bun.Cookie({
+  name: "theme",
+  value: "dark",
+  maxAge: 3600,
+  secure: true,
+});
+```
+
+### Constructors
+
+```ts
+// Basic constructor with name/value
+new Bun.Cookie(name: string, value: string);
+
+// Constructor with name, value, and options
+new Bun.Cookie(name: string, value: string, options: CookieInit);
+
+// Constructor from cookie string
+new Bun.Cookie(cookieString: string);
+
+// Constructor from cookie object
+new Bun.Cookie(options: CookieInit);
+```
+
+### Properties
+
+```ts
+cookie.name; // string - Cookie name
+cookie.value; // string - Cookie value
+cookie.domain; // string | null - Domain scope (null if not specified)
+cookie.path; // string - URL path scope (defaults to "/")
+cookie.expires; // number | undefined - Expiration timestamp (ms since epoch)
+cookie.secure; // boolean - Require HTTPS
+cookie.sameSite; // "strict" | "lax" | "none" - SameSite setting
+cookie.partitioned; // boolean - Whether the cookie is partitioned (CHIPS)
+cookie.maxAge; // number | undefined - Max age in seconds
+cookie.httpOnly; // boolean - Accessible only via HTTP (not JavaScript)
+```
+
+### Methods
+
+#### `isExpired(): boolean`
+
+Checks if the cookie has expired.
+
+```ts
+// Expired cookie (Date in the past)
+const expiredCookie = new Bun.Cookie("name", "value", {
+  expires: new Date(Date.now() - 1000),
+});
+console.log(expiredCookie.isExpired()); // true
+
+// Valid cookie (Using maxAge instead of expires)
+const validCookie = new Bun.Cookie("name", "value", {
+  maxAge: 3600, // 1 hour in seconds
+});
+console.log(validCookie.isExpired()); // false
+
+// Session cookie (no expiration)
+const sessionCookie = new Bun.Cookie("name", "value");
+console.log(sessionCookie.isExpired()); // false
+```
+
+#### `serialize(): string`
+
+#### `toString(): string`
+
+Returns a string representation of the cookie suitable for a `Set-Cookie` header.
+
+```ts
+const cookie = new Bun.Cookie("session", "abc123", {
+  domain: "example.com",
+  path: "/admin",
+  expires: new Date(Date.now() + 86400000),
+  secure: true,
+  httpOnly: true,
+  sameSite: "strict",
+});
+
+console.log(cookie.serialize());
+// => "session=abc123; Domain=example.com; Path=/admin; Expires=Sun, 19 Mar 2025 15:03:26 GMT; Secure; HttpOnly; SameSite=strict"
+console.log(cookie.toString());
+// => "session=abc123; Domain=example.com; Path=/admin; Expires=Sun, 19 Mar 2025 15:03:26 GMT; Secure; HttpOnly; SameSite=strict"
+```
+
+#### `toJSON(): CookieInit`
+
+Converts the cookie to a plain object suitable for JSON serialization.
+
+```ts
+const cookie = new Bun.Cookie("session", "abc123", {
+  secure: true,
+  httpOnly: true,
+});
+
+const json = cookie.toJSON();
+// => {
+//   name: "session",
+//   value: "abc123",
+//   path: "/",
+//   secure: true,
+//   httpOnly: true,
+//   sameSite: "lax",
+//   partitioned: false
+// }
+
+// Works with JSON.stringify
+const jsonString = JSON.stringify(cookie);
+```
+
+### Static methods
+
+#### `Cookie.parse(cookieString: string): Cookie`
+
+Parses a cookie string into a `Cookie` instance.
+
+```ts
+const cookie = Bun.Cookie.parse("name=value; Path=/; Secure; SameSite=Lax");
+
+console.log(cookie.name); // "name"
+console.log(cookie.value); // "value"
+console.log(cookie.path); // "/"
+console.log(cookie.secure); // true
+console.log(cookie.sameSite); // "lax"
+```
+
+#### `Cookie.from(name: string, value: string, options?: CookieInit): Cookie`
+
+Factory method to create a cookie.
+
+```ts
+const cookie = Bun.Cookie.from("session", "abc123", {
+  httpOnly: true,
+  secure: true,
+  maxAge: 3600,
+});
+```
+
+## Types
+
+```ts
+interface CookieInit {
+  name?: string;
+  value?: string;
+  domain?: string;
+  /** Defaults to '/'. To allow the browser to set the path, use an empty string. */
+  path?: string;
+  expires?: number | Date | string;
+  secure?: boolean;
+  /** Defaults to `lax`. */
+  sameSite?: CookieSameSite;
+  httpOnly?: boolean;
+  partitioned?: boolean;
+  maxAge?: number;
+}
+
+interface CookieStoreDeleteOptions {
+  name: string;
+  domain?: string | null;
+  path?: string;
+}
+
+interface CookieStoreGetOptions {
+  name?: string;
+  url?: string;
+}
+
+type CookieSameSite = "strict" | "lax" | "none";
+
+class Cookie {
+  constructor(name: string, value: string, options?: CookieInit);
+  constructor(cookieString: string);
+  constructor(cookieObject?: CookieInit);
+
+  readonly name: string;
+  value: string;
+  domain?: string;
+  path: string;
+  expires?: Date;
+  secure: boolean;
+  sameSite: CookieSameSite;
+  partitioned: boolean;
+  maxAge?: number;
+  httpOnly: boolean;
+
+  isExpired(): boolean;
+
+  serialize(): string;
+  toString(): string;
+  toJSON(): CookieInit;
+
+  static parse(cookieString: string): Cookie;
+  static from(name: string, value: string, options?: CookieInit): Cookie;
+}
+
+class CookieMap implements Iterable<[string, string]> {
+  constructor(init?: string[][] | Record<string, string> | string);
+
+  get(name: string): string | null;
+
+  toSetCookieHeaders(): string[];
+
+  has(name: string): boolean;
+  set(name: string, value: string, options?: CookieInit): void;
+  set(options: CookieInit): void;
+  delete(name: string): void;
+  delete(options: CookieStoreDeleteOptions): void;
+  delete(name: string, options: Omit<CookieStoreDeleteOptions, "name">): void;
+  toJSON(): Record<string, string>;
+
+  readonly size: number;
+
+  entries(): IterableIterator<[string, string]>;
+  keys(): IterableIterator<string>;
+  values(): IterableIterator<string>;
+  forEach(callback: (value: string, key: string, map: CookieMap) => void): void;
+  [Symbol.iterator](): IterableIterator<[string, string]>;
+}
+```

docs/api/fetch.md

@@ -204,7 +204,7 @@ To customize the TLS validation, use the `checkServerIdentity` option in `tls`
 await fetch("https://example.com", {
   tls: {
     checkServerIdentity: (hostname, peerCertificate) => {
-      // Return an error if the certificate is invalid
+      // Return an Error if the certificate is invalid
     },
   },
 });

docs/api/http.md

@@ -61,6 +61,7 @@ Routes in `Bun.serve()` receive a `BunRequest` (which extends [`Request`](https:
 // Simplified for brevity
 interface BunRequest<T extends string> extends Request {
   params: Record<T, string>;
+  readonly cookies: CookieMap;
 }
 ```
 
@@ -934,6 +935,83 @@ const server = Bun.serve({
 
 Returns `null` for closed requests or Unix domain sockets.
 
+## Working with Cookies
+
+Bun provides a built-in API for working with cookies in HTTP requests and responses. The `BunRequest` object includes a `cookies` property that provides a `CookieMap` for easily accessing and manipulating cookies. When using `routes`, `Bun.serve()` automatically tracks `request.cookies.set` and applies them to the response.
+
+### Reading cookies
+
+Read cookies from incoming requests using the `cookies` property on the `BunRequest` object:
+
+```ts
+Bun.serve({
+  routes: {
+    "/profile": req => {
+      // Access cookies from the request
+      const userId = req.cookies.get("user_id");
+      const theme = req.cookies.get("theme") || "light";
+
+      return Response.json({
+        userId,
+        theme,
+        message: "Profile page",
+      });
+    },
+  },
+});
+```
+
+### Setting cookies
+
+To set cookies, use the `set` method on the `CookieMap` from the `BunRequest` object.
+
+```ts
+Bun.serve({
+  routes: {
+    "/login": req => {
+      const cookies = req.cookies;
+
+      // Set a cookie with various options
+      cookies.set("user_id", "12345", {
+        maxAge: 60 * 60 * 24 * 7, // 1 week
+        httpOnly: true,
+        secure: true,
+        path: "/",
+      });
+
+      // Add a theme preference cookie
+      cookies.set("theme", "dark");
+
+      // Modified cookies from the request are automatically applied to the response
+      return new Response("Login successful");
+    },
+  },
+});
+```
+
+`Bun.serve()` automatically tracks modified cookies from the request and applies them to the response.
+
+### Deleting cookies
+
+To delete a cookie, use the `delete` method on the `request.cookies` (`CookieMap`) object:
+
+```ts
+Bun.serve({
+  routes: {
+    "/logout": req => {
+      // Delete the user_id cookie
+      req.cookies.delete("user_id", {
+        path: "/",
+      });
+
+      return new Response("Logged out successfully");
+    },
+  },
+});
+```
+
+Deleted cookies become a `Set-Cookie` header on the response with the `maxAge` set to `0` and an empty `value`.
+
 ## Server Metrics
 
 ### server.pendingRequests and server.pendingWebSockets

docs/api/node-api.md

@@ -12,5 +12,3 @@ Alternatively, use `process.dlopen`:
 let mod = { exports: {} };
 process.dlopen(mod, "./my-node-module.node");
 ```
-
-Bun polyfills the [`detect-libc`](https://npmjs.com/package/detect-libc) package, which is used by many Node-API modules to detect which `.node` binding to `require`.

docs/api/s3.md

@@ -715,7 +715,7 @@ await S3Client.delete("my-file.txt", credentials);
 await S3Client.unlink("my-file.txt", credentials);
 ```
 
-## s3:// protocol
+## `s3://` protocol
 
 To make it easier to use the same code for local files and S3 files, the `s3://` protocol is supported in `fetch` and `Bun.file()`.
 

docs/api/spawn.md

@@ -77,6 +77,16 @@ console.log(text); // "const input = "hello world".repeat(400); ..."
 
 ---
 
+- `ReadableStream`
+- Use a readable stream as input.
+
+---
+
+- `Blob`
+- Use a blob as input.
+
+---
+
 - `number`
 - Read from the file with a given file descriptor.
 
@@ -129,13 +139,13 @@ Configure the output stream by passing one of the following values to `stdout/st
 
 ---
 
-- `Bun.file()`
-- Write to the specified file.
+- `"ignore"`
+- Discard the output.
 
 ---
 
-- `null`
-- Write to `/dev/null`.
+- `Bun.file()`
+- Write to the specified file.
 
 ---
 
@@ -174,7 +184,8 @@ const proc = Bun.spawn(["bun", "--version"]);
 proc.kill();
 proc.killed; // true
 
-proc.kill(); // specify an exit code
+proc.kill(15); // specify a signal code
+proc.kill("SIGTERM"); // specify a signal name
 ```
 
 The parent `bun` process will not terminate until all child processes have exited. Use `proc.unref()` to detach the child process from the parent.
@@ -184,6 +195,64 @@ const proc = Bun.spawn(["bun", "--version"]);
 proc.unref();
 ```
 
+## Resource usage
+
+You can get information about the process's resource usage after it has exited:
+
+```ts
+const proc = Bun.spawn(["bun", "--version"]);
+await proc.exited;
+
+const usage = proc.resourceUsage();
+console.log(`Max memory used: ${usage.maxRSS} bytes`);
+console.log(`CPU time (user): ${usage.cpuTime.user} µs`);
+console.log(`CPU time (system): ${usage.cpuTime.system} µs`);
+```
+
+## Using AbortSignal
+
+You can abort a subprocess using an `AbortSignal`:
+
+```ts
+const controller = new AbortController();
+const { signal } = controller;
+
+const proc = Bun.spawn({
+  cmd: ["sleep", "100"],
+  signal,
+});
+
+// Later, to abort the process:
+controller.abort();
+```
+
+## Using timeout and killSignal
+
+You can set a timeout for a subprocess to automatically terminate after a specific duration:
+
+```ts
+// Kill the process after 5 seconds
+const proc = Bun.spawn({
+  cmd: ["sleep", "10"],
+  timeout: 5000, // 5 seconds in milliseconds
+});
+
+await proc.exited; // Will resolve after 5 seconds
+```
+
+By default, timed-out processes are killed with the `SIGTERM` signal. You can specify a different signal with the `killSignal` option:
+
+```ts
+// Kill the process with SIGKILL after 5 seconds
+const proc = Bun.spawn({
+  cmd: ["sleep", "10"],
+  timeout: 5000,
+  killSignal: "SIGKILL", // Can be string name or signal number
+});
+```
+
+The `killSignal` option also controls which signal is sent when an AbortSignal is aborted.
+
 ## Inter-process communication (IPC)
 
 Bun supports direct inter-process communication channel between two `bun` processes. To receive messages from a spawned Bun subprocess, specify an `ipc` handler.
@@ -233,11 +302,17 @@ process.send("Hello from child as string");
 process.send({ message: "Hello from child as object" });
 ```
 
-The `ipcMode` option controls the underlying communication format between the two processes:
+The `serialization` option controls the underlying communication format between the two processes:
 
 - `advanced`: (default) Messages are serialized using the JSC `serialize` API, which supports cloning [everything `structuredClone` supports](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Structured_clone_algorithm). This does not support transferring ownership of objects.
 - `json`: Messages are serialized using `JSON.stringify` and `JSON.parse`, which does not support as many object types as `advanced` does.
 
+To disconnect the IPC channel from the parent process, call:
+
+```ts
+childProc.disconnect();
+```
+
 ### IPC between Bun & Node.js
 
 To use IPC between a `bun` process and a Node.js process, set `serialization: "json"` in `Bun.spawn`. This is because Node.js and Bun use different JavaScript engines with different object serialization formats.
@@ -310,7 +385,7 @@ spawnSync echo hi    1.47 ms/iter     (1.14 ms … 2.64 ms)   1.57 ms   2.37 ms
 
 ## Reference
 
-A simple reference of the Spawn API and types are shown below. The real types have complex generics to strongly type the `Subprocess` streams with the options passed to `Bun.spawn` and `Bun.spawnSync`. For full details, find these types as defined [bun.d.ts](https://github.com/oven-sh/bun/blob/main/packages/bun-types/bun.d.ts).
+A reference of the Spawn API and types are shown below. The real types have complex generics to strongly type the `Subprocess` streams with the options passed to `Bun.spawn` and `Bun.spawnSync`. For full details, find these types as defined [bun.d.ts](https://github.com/oven-sh/bun/blob/main/packages/bun-types/bun.d.ts).
 
 ```ts
 interface Bun {
@@ -329,16 +404,25 @@ interface Bun {
 namespace SpawnOptions {
   interface OptionsObject {
     cwd?: string;
-    env?: Record<string, string>;
-    stdin?: SpawnOptions.Readable;
-    stdout?: SpawnOptions.Writable;
-    stderr?: SpawnOptions.Writable;
-    onExit?: (
-      proc: Subprocess,
+    env?: Record<string, string | undefined>;
+    stdio?: [Writable, Readable, Readable];
+    stdin?: Writable;
+    stdout?: Readable;
+    stderr?: Readable;
+    onExit?(
+      subprocess: Subprocess,
       exitCode: number | null,
-      signalCode: string | null,
-      error: Error | null,
-    ) => void;
+      signalCode: number | null,
+      error?: ErrorLike,
+    ): void | Promise<void>;
+    ipc?(message: any, subprocess: Subprocess): void;
+    serialization?: "json" | "advanced";
+    windowsHide?: boolean;
+    windowsVerbatimArguments?: boolean;
+    argv0?: string;
+    signal?: AbortSignal;
+    timeout?: number;
+    killSignal?: string | number;
   }
 
   type Readable =
@@ -366,39 +450,62 @@ namespace SpawnOptions {
     | Request;
 }
 
-interface Subprocess<Stdin, Stdout, Stderr> {
+interface Subprocess extends AsyncDisposable {
+  readonly stdin: FileSink | number | undefined;
+  readonly stdout: ReadableStream<Uint8Array> | number | undefined;
+  readonly stderr: ReadableStream<Uint8Array> | number | undefined;
+  readonly readable: ReadableStream<Uint8Array> | number | undefined;
   readonly pid: number;
-  // the exact stream types here are derived from the generic parameters
-  readonly stdin: number | ReadableStream | FileSink | undefined;
-  readonly stdout: number | ReadableStream | undefined;
-  readonly stderr: number | ReadableStream | undefined;
-
   readonly exited: Promise<number>;
-
-  readonly exitCode: number | undefined;
-  readonly signalCode: Signal | null;
+  readonly exitCode: number | null;
+  readonly signalCode: NodeJS.Signals | null;
   readonly killed: boolean;
 
+  kill(exitCode?: number | NodeJS.Signals): void;
   ref(): void;
   unref(): void;
-  kill(code?: number): void;
+
+  send(message: any): void;
+  disconnect(): void;
+  resourceUsage(): ResourceUsage | undefined;
 }
 
-interface SyncSubprocess<Stdout, Stderr> {
-  readonly pid: number;
-  readonly success: boolean;
-  // the exact buffer types here are derived from the generic parameters
-  readonly stdout: Buffer | undefined;
-  readonly stderr: Buffer | undefined;
+interface SyncSubprocess {
+  stdout: Buffer | undefined;
+  stderr: Buffer | undefined;
+  exitCode: number;
+  success: boolean;
+  resourceUsage: ResourceUsage;
+  signalCode?: string;
+  exitedDueToTimeout?: true;
+  pid: number;
 }
 
-type ReadableSubprocess = Subprocess<any, "pipe", "pipe">;
-type WritableSubprocess = Subprocess<"pipe", any, any>;
-type PipedSubprocess = Subprocess<"pipe", "pipe", "pipe">;
-type NullSubprocess = Subprocess<null, null, null>;
+interface ResourceUsage {
+  contextSwitches: {
+    voluntary: number;
+    involuntary: number;
+  };
 
-type ReadableSyncSubprocess = SyncSubprocess<"pipe", "pipe">;
-type NullSyncSubprocess = SyncSubprocess<null, null>;
+  cpuTime: {
+    user: number;
+    system: number;
+    total: number;
+  };
+  maxRSS: number;
+
+  messages: {
+    sent: number;
+    received: number;
+  };
+  ops: {
+    in: number;
+    out: number;
+  };
+  shmSize: number;
+  signalCount: number;
+  swapCount: number;
+}
 
 type Signal =
   | "SIGABRT"

docs/api/sql.md

@@ -240,7 +240,7 @@ const result = await sql.unsafe(
 
 ### Execute and Cancelling Queries
 
-Bun's SQL is lazy that means its will only start executing when awaited or executed with `.execute()`.
+Bun's SQL is lazy, which means it will only start executing when awaited or executed with `.execute()`.
 You can cancel a query that is currently executing by calling the `cancel()` method on the query object.
 
 ```ts

docs/api/tcp.md

@@ -11,7 +11,7 @@ Bun.listen({
   socket: {
     data(socket, data) {}, // message received from client
     open(socket) {}, // socket opened
-    close(socket) {}, // socket closed
+    close(socket, error) {}, // socket closed
     drain(socket) {}, // socket ready for more data
     error(socket, error) {}, // error handler
   },
@@ -30,7 +30,7 @@ Bun.listen({
     open(socket) {},
     data(socket, data) {},
     drain(socket) {},
-    close(socket) {},
+    close(socket, error) {},
     error(socket, error) {},
   },
 });
@@ -122,7 +122,7 @@ const socket = await Bun.connect({
   socket: {
     data(socket, data) {},
     open(socket) {},
-    close(socket) {},
+    close(socket, error) {},
     drain(socket) {},
     error(socket, error) {},
 

docs/bundler/css_modules.md

@@ -0,0 +1,145 @@
+# CSS Modules
+
+Bun's bundler also supports bundling [CSS modules](https://css-tricks.com/css-modules-part-1-need/) in addition to [regular CSS](/docs/bundler/css) with support for the following features:
+
+- Automatically detecting CSS module files (`.module.css`) with zero configuration
+- Composition (`composes` property)
+- Importing CSS modules into JSX/TSX
+- Warnings/errors for invalid usages of CSS modules
+
+A CSS module is a CSS file (with the `.module.css` extension) where are all class names and animations are scoped to the file. This helps you avoid class name collisions as CSS declarations are globally scoped by default.
+
+Under the hood, Bun's bundler transforms locally scoped class names into unique identifiers.
+
+## Getting started
+
+Create a CSS file with the `.module.css` extension:
+
+```css
+/* styles.module.css */
+.button {
+  color: red;
+}
+
+/* other-styles.module.css */
+.button {
+  color: blue;
+}
+```
+
+You can then import this file, for example into a TSX file:
+
+```tsx
+import styles from "./styles.module.css";
+import otherStyles from "./other-styles.module.css";
+
+export default function App() {
+  return (
+    <>
+      <button className={styles.button}>Red button!</button>
+      <button className={otherStyles.button}>Blue button!</button>
+    </>
+  );
+}
+```
+
+The `styles` object from importing the CSS module file will be an object with all class names as keys and
+their unique identifiers as values:
+
+```tsx
+import styles from "./styles.module.css";
+import otherStyles from "./other-styles.module.css";
+
+console.log(styles);
+console.log(otherStyles);
+```
+
+This will output:
+
+```ts
+{
+  button: "button_123";
+}
+
+{
+  button: "button_456";
+}
+```
+
+As you can see, the class names are unique to each file, avoiding any collisions!
+
+### Composition
+
+CSS modules allow you to _compose_ class selectors together. This lets you reuse style rules across multiple classes.
+
+For example:
+
+```css
+/* styles.module.css */
+.button {
+  composes: background;
+  color: red;
+}
+
+.background {
+  background-color: blue;
+}
+```
+
+Would be the same as writing:
+
+```css
+.button {
+  background-color: blue;
+  color: red;
+}
+
+.background {
+  background-color: blue;
+}
+```
+
+{% callout %}
+There are a couple rules to keep in mind when using `composes`:
+
+- A `composes` property must come before any regular CSS properties or declarations
+- You can only use `composes` on a **simple selector with a single class name**:
+
+```css
+#button {
+  /* Invalid! `#button` is not a class selector */
+  composes: background;
+}
+
+.button,
+.button-secondary {
+  /* Invalid! `.button, .button-secondary` is not a simple selector */
+  composes: background;
+}
+```
+
+{% /callout %}
+
+### Composing from a separate CSS module file
+
+You can also compose from a separate CSS module file:
+
+```css
+/* background.module.css */
+.background {
+  background-color: blue;
+}
+
+/* styles.module.css */
+.button {
+  composes: background from "./background.module.css";
+  color: red;
+}
+```
+
+{% callout %}
+When composing classes from separate files, be sure that they do not contain the same properties.
+
+The CSS module spec says that composing classes from separate files with conflicting properties is
+undefined behavior, meaning that the output may differ and be unreliable.
+{% /callout %}

docs/bundler/fullstack.md

@@ -309,5 +309,4 @@ This works similarly to how [`Bun.build` processes HTML files](/docs/bundler/htm
 
 ## This is a work in progress
 
-- ~Client-side hot reloading isn't wired up yet. It will be in the future.~ New in Bun v1.2.3
 - This doesn't support `bun build` yet. It also will in the future.

docs/bundler/hmr.md

@@ -0,0 +1,234 @@
+Hot Module Replacement (HMR) allows you to update modules in a running
+application without needing a full page reload. This preserves the application
+state and improves the development experience.
+
+HMR is enabled by default when using Bun's full-stack development server.
+
+## `import.meta.hot` API Reference
+
+Bun implements a client-side HMR API modeled after [Vite's `import.meta.hot` API](https://vitejs.dev/guide/api-hmr.html). It can be checked for with `if (import.meta.hot)`, tree-shaking it in production
+
+```ts
+if (import.meta.hot) {
+  // HMR APIs are available.
+}
+```
+
+However, **this check is often not needed** as Bun will dead-code-eliminate
+calls to all of the HMR APIs in production builds.
+
+```ts
+// This entire function call will be removed in production!
+import.meta.hot.dispose(() => {
+  console.log("dispose");
+});
+```
+
+For this to work, Bun forces these APIs to be called without indirection. That means the following do not work:
+
+```ts#invalid-hmr-usage.ts
+// INVALID: Assigning `hot` to a variable
+const hot = import.meta.hot;
+hot.accept();
+
+// INVALID: Assigning `import.meta` to a variable
+const meta = import.meta;
+meta.hot.accept();
+console.log(meta.hot.data);
+
+// INVALID: Passing to a function
+doSomething(import.meta.hot.dispose);
+
+// OK: The full phrase "import.meta.hot.<API>" must be called directly:
+import.meta.hot.accept();
+
+// OK: `data` can be passed to functions:
+doSomething(import.meta.hot.data);
+```
+
+{% callout %}
+
+**Note** — The HMR API is still a work in progress. Some features are missing. HMR can be disabled in `Bun.serve` by setting the `development` option to `{ hmr: false }`.
+
+{% endcallout %}
+
+|     | Method             | Notes                                                                 |
+| --- | ------------------ | --------------------------------------------------------------------- |
+| ✅  | `hot.accept()`     | Indicate that a hot update can be replaced gracefully.                |
+| ✅  | `hot.data`         | Persist data between module evaluations.                              |
+| ✅  | `hot.dispose()`    | Add a callback function to run when a module is about to be replaced. |
+| ❌  | `hot.invalidate()` |                                                                       |
+| ✅  | `hot.on()`         | Attach an event listener                                              |
+| ✅  | `hot.off()`        | Remove an event listener from `on`.                                   |
+| ❌  | `hot.send()`       |                                                                       |
+| 🚧  | `hot.prune()`      | **NOTE**: Callback is currently never called.                         |
+| ✅  | `hot.decline()`    | No-op to match Vite's `import.meta.hot`                               |
+
+### `import.meta.hot.accept()`
+
+The `accept()` method indicates that a module can be hot-replaced. When called
+without arguments, it indicates that this module can be replaced simply by
+re-evaluating the file. After a hot update, importers of this module will be
+automatically patched.
+
+```ts#index.ts
+import { getCount } from "./foo.ts";
+
+console.log("count is ", getCount());
+
+import.meta.hot.accept();
+
+export function getNegativeCount() {
+  return -getCount();
+}
+```
+
+This creates a hot-reloading boundary for all of the files that `index.ts`
+imports. That means whenever `foo.ts` or any of its dependencies are saved, the
+update will bubble up to `index.ts` will re-evaluate. Files that import
+`index.ts` will then be patched to import the new version of
+`getNegativeCount()`. If only `index.ts` is updated, only the one file will be
+re-evaluated, and the counter in `foo.ts` is reused.
+
+This may be used in combination with `import.meta.hot.data` to transfer state
+from the previous module to the new one.
+
+When no modules call `import.meta.hot.accept()` (and there isn't React Fast
+Refresh or a plugin calling it for you), the page will reload when the file
+updates, and a console warning shows which files were invalidated. This warning
+is safe to ignore if it makes more sense to rely on full page reloads.
+
+#### With callback
+
+When provided one callback, `import.meta.hot.accept` will function how it does
+in Vite. Instead of patching the importers of this module, it will call the
+callback with the new module.
+
+```ts
+export const count = 0;
+
+import.meta.hot.accept(newModule => {
+  if (newModule) {
+    // newModule is undefined when SyntaxError happened
+    console.log("updated: count is now ", newModule.count);
+  }
+});
+```
+
+Prefer using `import.meta.hot.accept()` without an argument as it usually makes your code easier to understand.
+
+#### Accepting other modules
+
+```ts
+import { count } from "./foo";
+
+import.meta.hot.accept("./foo", () => {
+  if (!newModule) return;
+
+  console.log("updated: count is now ", count);
+});
+```
+
+Indicates that a dependency's module can be accepted. When the dependency is updated, the callback will be called with the new module.
+
+#### With multiple dependencies
+
+```ts
+import.meta.hot.accept(["./foo", "./bar"], newModules => {
+  // newModules is an array where each item corresponds to the updated module
+  // or undefined if that module had a syntax error
+});
+```
+
+Indicates that multiple dependencies' modules can be accepted. This variant accepts an array of dependencies, where the callback will receive the updated modules, and `undefined` for any that had errors.
+
+### `import.meta.hot.data`
+
+`import.meta.hot.data` maintains state between module instances during hot
+replacement, enabling data transfer from previous to new versions. When
+`import.meta.hot.data` is written into, Bun will also mark this module as
+capable of self-accepting (equivalent of calling `import.meta.hot.accept()`).
+
+```ts
+import { createRoot } from "react-dom/client";
+import { App } from "./app";
+
+const root = import.meta.hot.data.root ??= createRoot(elem);
+root.render(<App />); // re-use an existing root
+```
+
+In production, `data` is inlined to be `{}`, meaning it cannot be used as a state holder.
+
+The above pattern is recommended for stateful modules because Bun knows it can minify `{}.prop ??= value` into `value` in production.
+
+### `import.meta.hot.dispose()`
+
+Attaches an on-dispose callback. This is called:
+
+- Just before the module is replaced with another copy (before the next is loaded)
+- After the module is detached (removing all imports to this module, see `import.meta.hot.prune()`)
+
+```ts
+const sideEffect = setupSideEffect();
+
+import.meta.hot.dispose(() => {
+  sideEffect.cleanup();
+});
+```
+
+This callback is not called on route navigation or when the browser tab closes.
+
+Returning a promise will delay module replacement until the module is disposed.
+All dispose callbacks are called in parallel.
+
+### `import.meta.hot.prune()`
+
+Attaches an on-prune callback. This is called when all imports to this module
+are removed, but the module was previously loaded.
+
+This can be used to clean up resources that were created when the module was
+loaded. Unlike `import.meta.hot.dispose()`, this pairs much better with `accept`
+and `data` to manage stateful resources. A full example managing a `WebSocket`:
+
+```ts
+import { something } from "./something";
+
+// Initialize or re-use a WebSocket connection
+export const ws = (import.meta.hot.data.ws ??= new WebSocket(location.origin));
+
+// If the module's import is removed, clean up the WebSocket connection.
+import.meta.hot.prune(() => {
+  ws.close();
+});
+```
+
+If `dispose` was used instead, the WebSocket would close and re-open on every
+hot update. Both versions of the code will prevent page reloads when imported
+files are updated.
+
+### `import.meta.hot.on()` and `off()`
+
+`on()` and `off()` are used to listen for events from the HMR runtime. Event names are prefixed with a prefix so that plugins do not conflict with each other.
+
+```ts
+import.meta.hot.on("bun:beforeUpdate", () => {
+  console.log("before a hot update");
+});
+```
+
+When a file is replaced, all of its event listeners are automatically removed.
+
+A list of all built-in events:
+
+| Event                  | Emitted when                                                                                    |
+| ---------------------- | ----------------------------------------------------------------------------------------------- |
+| `bun:beforeUpdate`     | before a hot update is applied.                                                                 |
+| `bun:afterUpdate`      | after a hot update is applied.                                                                  |
+| `bun:beforeFullReload` | before a full page reload happens.                                                              |
+| `bun:beforePrune`      | before prune callbacks are called.                                                              |
+| `bun:invalidate`       | when a module is invalidated with `import.meta.hot.invalidate()`                                |
+| `bun:error`            | when a build or runtime error occurs                                                            |
+| `bun:ws:disconnect`    | when the HMR WebSocket connection is lost. This can indicate the development server is offline. |
+| `bun:ws:connect`       | when the HMR WebSocket connects or re-connects.                                                 |
+
+For compatibility with Vite, the above events are also available via `vite:*` prefix instead of `bun:*`.

docs/bundler/loaders.md

@@ -4,6 +4,12 @@ The Bun bundler implements a set of default loaders out of the box. As a rule of
 
 Bun uses the file extension to determine which built-in _loader_ should be used to parse the file. Every loader has a name, such as `js`, `tsx`, or `json`. These names are used when building [plugins](https://bun.sh/docs/bundler/plugins) that extend Bun with custom loaders.
 
+You can explicitly specify which loader to use using the 'loader' import attribute.
+
+```ts
+import my_toml from "./my_file" with { loader: "toml" };
+```
+
 ## Built-in loaders
 
 ### `js`

docs/cli/publish.md

@@ -82,6 +82,11 @@ The `--dry-run` flag can be used to simulate the publish process without actuall
 $ bun publish --dry-run
 ```
 
+### `--gzip-level`
+
+Specify the level of gzip compression to use when packing the package. Only applies to `bun publish` without a tarball path argument. Values range from `0` to `9` (default is `9`).
+{% bunCLIUsage command="publish" /%}
+
 ### `--auth-type`
 
 If you have 2FA enabled for your npm account, `bun publish` will prompt you for a one-time password. This can be done through a browser or the CLI. The `--auth-type` flag can be used to tell the npm registry which method you prefer. The possible values are `web` and `legacy`, with `web` being the default.
@@ -102,7 +107,6 @@ Provide a one-time password directly to the CLI. If the password is valid, this
 $ bun publish --otp 123456
 ```
 
-### `--gzip-level`
-
-Specify the level of gzip compression to use when packing the package. Only applies to `bun publish` without a tarball path argument. Values range from `0` to `9` (default is `9`).
-{% bunCLIUsage command="publish" /%}
+{% callout %}
+**Note** - `bun publish` respects the `NPM_CONFIG_TOKEN` environment variable which can be used when publishing in github actions or automated workflows.
+{% /callout %}

docs/guides/runtime/typescript.md

@@ -15,8 +15,8 @@ Below is the full set of recommended `compilerOptions` for a Bun project. With t
 ```jsonc
 {
   "compilerOptions": {
-    // Enable latest features
-    "lib": ["ESNext", "DOM"],
+    // Environment setup & latest features
+    "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
     "moduleDetection": "force",
@@ -33,11 +33,12 @@ Below is the full set of recommended `compilerOptions` for a Bun project. With t
     "strict": true,
     "skipLibCheck": true,
     "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
 
-    // Some stricter flags
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noPropertyAccessFromIndexSignature": true,
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false,
   },
 }
 ```

docs/nav.ts

@@ -215,12 +215,19 @@ export default {
     page("bundler", "`Bun.build`", {
       description: "Bundle code for consumption in the browser with Bun's native bundler.",
     }),
-    page("bundler/html", "Bundle frontend & static sites", {
+    page("bundler/html", "HTML & static sites", {
       description: `Zero-config HTML bundler for single-page apps and multi-page apps. Automatic bundling, TailwindCSS plugins, TypeScript, JSX, React support, and incredibly fast builds`,
     }),
+    page("bundler/css", "CSS", {
+      description: `Production ready CSS bundler with support for modern CSS features, CSS modules, and more.`,
+    }),
     page("bundler/fullstack", "Fullstack Dev Server", {
       description: "Serve your frontend and backend from the same app with Bun's dev server.",
     }),
+    page("bundler/hmr", "Hot reloading", {
+      description: `Update modules in a running application without reloading the page using import.meta.hot`,
+    }),
+
     page("bundler/loaders", "Loaders", {
       description: "Bun's built-in loaders for the bundler and runtime",
     }),
@@ -348,24 +355,24 @@ export default {
     page("api/spawn", "Child processes", {
       description: `Spawn sync and async child processes with easily configurable input and output streams.`,
     }), // "`Bun.spawn`"),
-    page("api/transpiler", "Transpiler", {
-      description: `Bun exposes its internal transpiler as a pluggable API.`,
-    }), // "`Bun.Transpiler`"),
+    page("api/html-rewriter", "HTMLRewriter", {
+      description: `Parse and transform HTML with Bun's native HTMLRewriter API, inspired by Cloudflare Workers.`,
+    }), // "`HTMLRewriter`"),
     page("api/hashing", "Hashing", {
       description: `Native support for a range of fast hashing algorithms.`,
     }), // "`Bun.serve`"),
     page("api/console", "Console", {
       description: `Bun implements a Node.js-compatible \`console\` object with colorized output and deep pretty-printing.`,
     }), // "`Node-API`"),
+    page("api/cookie", "Cookie", {
+      description: "Bun's native Cookie API simplifies working with HTTP cookies.",
+    }), // "`Node-API`"),
     page("api/ffi", "FFI", {
       description: `Call native code from JavaScript with Bun's foreign function interface (FFI) API.`,
     }), // "`bun:ffi`"),
     page("api/cc", "C Compiler", {
       description: `Build & run native C from JavaScript with Bun's native C compiler API`,
     }), // "`bun:ffi`"),
-    page("api/html-rewriter", "HTMLRewriter", {
-      description: `Parse and transform HTML with Bun's native HTMLRewriter API, inspired by Cloudflare Workers.`,
-    }), // "`HTMLRewriter`"),
     page("api/test", "Testing", {
       description: `Bun's built-in test runner is fast and uses Jest-compatible syntax.`,
     }), // "`bun:test`"),
@@ -391,6 +398,9 @@ export default {
     page("api/color", "Color", {
       description: `Bun's color function leverages Bun's CSS parser for parsing, normalizing, and converting colors from user input to a variety of output formats.`,
     }), // "`Color`"),
+    page("api/transpiler", "Transpiler", {
+      description: `Bun exposes its internal transpiler as a pluggable API.`,
+    }), // "`Bun.Transpiler`"),
 
     // divider("Dev Server"),
     // page("bun-dev", "Vanilla"),

docs/project/building-windows.md

@@ -60,7 +60,7 @@ Visual Studio can be installed graphically using the wizard or through WinGet:
 
 After Visual Studio, you need the following:
 
-- LLVM 18.1.8
+- LLVM 19.1.7
 - Go
 - Rust
 - NASM
@@ -81,7 +81,7 @@ After Visual Studio, you need the following:
 > irm https://get.scoop.sh | iex
 > scoop install nodejs-lts go rust nasm ruby perl ccache
 # scoop seems to be buggy if you install llvm and the rest at the same time
-> scoop install llvm@18.1.8
+> scoop install llvm@19.1.7
 ```
 
 {% /codetabs %}

docs/runtime/nodejs-apis.md

@@ -104,7 +104,7 @@ This page is updated regularly to reflect compatibility status of the latest ver
 
 ### [`node:crypto`](https://nodejs.org/api/crypto.html)
 
-🟡 Missing `ECDH` `checkPrime` `checkPrimeSync` `generatePrime` `generatePrimeSync` `hkdf` `hkdfSync` `secureHeapUsed` `setEngine` `setFips`
+🟡 Missing `secureHeapUsed` `setEngine` `setFips`
 
 Some methods are not optimized yet.
 
@@ -118,7 +118,7 @@ Some methods are not optimized yet.
 
 ### [`node:module`](https://nodejs.org/api/module.html)
 
-🟡 Missing `runMain` `syncBuiltinESMExports`, `Module#load()`. Overriding `require.cache` is supported for ESM & CJS modules. `module._extensions`, `module._pathCache`, `module._cache` are no-ops. `module.register` is not implemented and we recommend using a [`Bun.plugin`](https://bun.sh/docs/runtime/plugins) in the meantime.
+🟡 Missing `syncBuiltinESMExports`, `Module#load()`. Overriding `require.cache` is supported for ESM & CJS modules. `module._extensions`, `module._pathCache`, `module._cache` are no-ops. `module.register` is not implemented and we recommend using a [`Bun.plugin`](https://bun.sh/docs/runtime/plugins) in the meantime.
 
 ### [`node:net`](https://nodejs.org/api/net.html)
 
@@ -174,7 +174,7 @@ Some methods are not optimized yet.
 
 ### [`node:test`](https://nodejs.org/api/test.html)
 
-🔴 Not implemented. Use [`bun:test`](https://bun.sh/docs/cli/test) instead.
+🟡 Partly implemented. Missing mocks, snapshots, timers. Use [`bun:test`](https://bun.sh/docs/cli/test) instead.
 
 ### [`node:trace_events`](https://nodejs.org/api/tracing.html)
 
@@ -346,7 +346,7 @@ The table below lists all globals implemented by Node.js and Bun's current compa
 
 ### [`process`](https://nodejs.org/api/process.html)
 
-🟡 Mostly implemented. `process.binding` (internal Node.js bindings some packages rely on) is partially implemented. `process.title` is a currently a no-op on macOS & Linux. `getActiveResourcesInfo` `setActiveResourcesInfo`, `getActiveResources` and `setSourceMapsEnabled` are stubs. Newer APIs like `process.loadEnvFile` and `process.getBuiltinModule` are not implemented yet.
+🟡 Mostly implemented. `process.binding` (internal Node.js bindings some packages rely on) is partially implemented. `process.title` is currently a no-op on macOS & Linux. `getActiveResourcesInfo` `setActiveResourcesInfo`, `getActiveResources` and `setSourceMapsEnabled` are stubs. Newer APIs like `process.loadEnvFile` and `process.getBuiltinModule` are not implemented yet.
 
 ### [`queueMicrotask()`](https://developer.mozilla.org/en-US/docs/Web/API/queueMicrotask)
 
@@ -378,8 +378,7 @@ The table below lists all globals implemented by Node.js and Bun's current compa
 
 ### [`require()`](https://nodejs.org/api/globals.html#require)
 
-🟢 Fully implemented, including [`require.main`](https://nodejs.org/api/modules.html#requiremain), [`require.cache`](https://nodejs.org/api/modules.html#requirecache), [`require.resolve`](https://nodejs.org/api/modules.html#requireresolverequest-options). `require.extensions` is a stub.
-
+🟢 Fully implemented, including [`require.main`](https://nodejs.org/api/modules.html#requiremain), [`require.cache`](https://nodejs.org/api/modules.html#requirecache), [`require.resolve`](https://nodejs.org/api/modules.html#requireresolverequest-options).
 ### [`Response`](https://developer.mozilla.org/en-US/docs/Web/API/Response)
 
 🟢 Fully implemented.

docs/runtime/plugins.md

@@ -329,7 +329,7 @@ await Bun.build({
 
 {% callout %}
 
-**NOTE**: Plugin lifcycle callbacks (`onStart()`, `onResolve()`, etc.) do not have the ability to modify the `build.config` object in the `setup()` function. If you want to mutate `build.config`, you must do so directly in the `setup()` function:
+**NOTE**: Plugin lifecycle callbacks (`onStart()`, `onResolve()`, etc.) do not have the ability to modify the `build.config` object in the `setup()` function. If you want to mutate `build.config`, you must do so directly in the `setup()` function:
 
 ```ts
 await Bun.build({
@@ -400,7 +400,7 @@ type Loader = "js" | "jsx" | "ts" | "tsx" | "css" | "json" | "toml" | "object";
 
 ### Namespaces
 
-`onLoad` and `onResolve` accept an optional `namespace` string. What is a namespaace?
+`onLoad` and `onResolve` accept an optional `namespace` string. What is a namespace?
 
 Every module has a namespace. Namespaces are used to prefix the import in transpiled code; for instance, a loader with a `filter: /\.yaml$/` and `namespace: "yaml:"` will transform an import from `./myfile.yaml` into `yaml:./myfile.yaml`.
 

docs/typescript.md

@@ -17,7 +17,7 @@ Bun supports things like top-level await, JSX, and extensioned `.ts` imports, wh
 ```jsonc
 {
   "compilerOptions": {
-    // Enable latest features
+    // Environment setup & latest features
     "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
@@ -35,12 +35,13 @@ Bun supports things like top-level await, JSX, and extensioned `.ts` imports, wh
     "strict": true,
     "skipLibCheck": true,
     "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
 
-    // Some stricter flags
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noPropertyAccessFromIndexSignature": true
-  }
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false,
+  },
 }
 ```
 

misctools/lldb/lldb_commands

@@ -1,13 +0,0 @@
-# Tell LLDB what to do when the debugged process receives SIGPWR: pass it through to the process
-# (-p), but do not stop the process (-s) or notify the user (-n).
-#
-# JSC's garbage collector sends this signal (as configured by Bun WebKit in
-# Thread::initializePlatformThreading() in ThreadingPOSIX.cpp) to the JS thread to suspend or resume
-# it. So stopping the process would just create noise when debugging any long-running script.
-process handle -p true -s false -n false SIGPWR
-
-command script import misctools/lldb/lldb_pretty_printers.py
-type category enable zig.lang
-type category enable zig.std
-
-command script import misctools/lldb/lldb_webkit.py

misctools/lldb/lldb_webkit.py

@@ -329,7 +329,7 @@ def btjs(debugger, command, result, internal_dict):
     addressFormat = '#0{width}x'.format(width=target.GetAddressByteSize() * 2 + 2)
     process = target.GetProcess()
     thread = process.GetSelectedThread()
-    jscModule = target.module["JavaScriptCore"]
+    jscModule = target.module["JavaScriptCore"] or target.module["bun"] or target.module["bun-debug"]
 
     if jscModule.FindSymbol("JSC::CallFrame::describeFrame").GetSize() or jscModule.FindSymbol("_ZN3JSC9CallFrame13describeFrameEv").GetSize():
         annotateJSFrames = True

oxlint.json

@@ -29,7 +29,8 @@
     "test/js/**/*bad.js",
     "test/bundler/transpiler/decorators.test.ts", // uses `arguments` as decorator
     "test/bundler/native-plugin.test.ts", // parser doesn't handle import metadata
-    "test/bundler/transpiler/with-statement-works.js" // parser doesn't allow `with` statement
+    "test/bundler/transpiler/with-statement-works.js", // parser doesn't allow `with` statement
+    "test/js/node/module/extensions-fixture" // these files are not meant to be linted
   ],
   "overrides": [
     {

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "bun",
-  "version": "1.2.5",
+  "version": "1.2.8",
   "workspaces": [
     "./packages/bun-types"
   ],
@@ -31,6 +31,7 @@
   },
   "scripts": {
     "build": "bun run build:debug",
+    "bd": "(bun run --silent build:debug &> /tmp/bun.debug.build.log || (cat /tmp/bun.debug.build.log && rm -rf /tmp/bun.debug.build.log && exit 1)) && rm -f /tmp/bun.debug.build.log && ./build/debug/bun-debug",
     "build:debug": "bun ./scripts/build.mjs -GNinja -DCMAKE_BUILD_TYPE=Debug -B build/debug",
     "build:valgrind": "bun ./scripts/build.mjs -GNinja -DCMAKE_BUILD_TYPE=Debug -DENABLE_BASELINE=ON -ENABLE_VALGRIND=ON -B build/debug-valgrind",
     "build:release": "bun ./scripts/build.mjs -GNinja -DCMAKE_BUILD_TYPE=Release -B build/release",
@@ -44,6 +45,7 @@
     "build:release:with_logs": "cmake . -DCMAKE_BUILD_TYPE=Release -DENABLE_LOGS=true -GNinja -Bbuild-release && ninja -Cbuild-release",
     "build:debug-zig-release": "cmake . -DCMAKE_BUILD_TYPE=Release -DZIG_OPTIMIZE=Debug -GNinja -Bbuild-debug-zig-release && ninja -Cbuild-debug-zig-release",
     "css-properties": "bun run src/css/properties/generate_properties.ts",
+    "uv-posix-stubs": "bun run src/bun.js/bindings/libuv/generate_uv_posix_stubs.ts",
     "bump": "bun ./scripts/bump.ts",
     "typecheck": "tsc --noEmit && cd test && bun run typecheck",
     "fmt": "bun run prettier",

packages/bun-plugin-svelte/.gitignore

@@ -0,0 +1,34 @@
+# dependencies (bun install)
+node_modules
+
+# output
+out
+dist
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

packages/bun-plugin-svelte/README.md

@@ -0,0 +1,69 @@
+<p align="center">
+  <a href="https://bun.sh"><img src="https://github.com/user-attachments/assets/50282090-adfd-4ddb-9e27-c30753c6b161" alt="Logo" height=170></a>
+</p>
+<h1 align="center"><code>bun-plugin-svelte</code></h1>
+
+The official [Svelte](https://svelte.dev/) plugin for [Bun](https://bun.sh/).
+
+## Installation
+
+```sh
+$ bun add -D bun-plugin-svelte
+```
+
+## Dev Server Usage
+
+`bun-plugin-svelte` integrates with Bun's [Fullstack Dev Server](https://bun.sh/docs/bundler/fullstack), giving you
+HMR when developing your Svelte app.
+
+Start by registering it in your [bunfig.toml](https://bun.sh/docs/runtime/bunfig):
+
+```toml
+[serve.static]
+plugins = ["bun-plugin-svelte"]
+```
+
+Then start your dev server:
+
+```
+$ bun index.html
+```
+
+See the [example](https://github.com/oven-sh/bun/tree/main/packages/bun-plugin-svelte/example) for a complete example.
+
+## Bundler Usage
+
+`bun-plugin-svelte` lets you bundle Svelte components with [`Bun.build`](https://bun.sh/docs/bundler).
+
+```ts
+// build.ts
+// to use: bun run build.ts
+import { SveltePlugin } from "bun-plugin-svelte"; // NOTE: not published to npm yet
+
+Bun.build({
+  entrypoints: ["src/index.ts"],
+  outdir: "dist",
+  target: "browser",
+  sourcemap: true, // sourcemaps not yet supported
+  plugins: [
+    SveltePlugin({
+      development: true, // turn off for prod builds. Defaults to false
+    }),
+  ],
+});
+```
+
+## Server-Side Usage
+
+`bun-plugin-svelte` does not yet support server-side imports (e.g. for SSR).
+This will be added in the near future.
+
+## Not Yet Supported
+
+Support for these features will be added in the near future
+
+- Server-side imports/rendering
+- Source maps
+- CSS extensions (e.g. tailwind) in `<style>` blocks
+- TypeScript-specific features (e.g. enums and namespaces). If you're using
+  TypeScript 5.8, consider enabling [`--erasableSyntaxOnly`](https://devblogs.microsoft.com/typescript/announcing-typescript-5-8-beta/#the---erasablesyntaxonly-option)

packages/bun-plugin-svelte/bun.lock

@@ -0,0 +1,69 @@
+{
+  "lockfileVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "bun-plugin-svelte",
+      "devDependencies": {
+        "@threlte/core": "8.0.1",
+        "bun-types": "canary",
+        "svelte": "^5.20.4",
+      },
+      "peerDependencies": {
+        "svelte": "^5",
+      },
+    },
+  },
+  "packages": {
+    "@ampproject/remapping": ["@ampproject/remapping@2.3.0", "", { "dependencies": { "@jridgewell/gen-mapping": "^0.3.5", "@jridgewell/trace-mapping": "^0.3.24" } }, "sha512-30iZtAPgz+LTIYoeivqYo853f02jBYSd5uGnGpkFV0M3xOt9aN73erkgYAmZU43x4VfqcnLxW9Kpg3R5LC4YYw=="],
+
+    "@jridgewell/gen-mapping": ["@jridgewell/gen-mapping@0.3.8", "", { "dependencies": { "@jridgewell/set-array": "^1.2.1", "@jridgewell/sourcemap-codec": "^1.4.10", "@jridgewell/trace-mapping": "^0.3.24" } }, "sha512-imAbBGkb+ebQyxKgzv5Hu2nmROxoDOXHh80evxdoXNOrvAnVx7zimzc1Oo5h9RlfV4vPXaE2iM5pOFbvOCClWA=="],
+
+    "@jridgewell/resolve-uri": ["@jridgewell/resolve-uri@3.1.2", "", {}, "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw=="],
+
+    "@jridgewell/set-array": ["@jridgewell/set-array@1.2.1", "", {}, "sha512-R8gLRTZeyp03ymzP/6Lil/28tGeGEzhx1q2k703KGWRAI1VdvPIXdG70VJc2pAMw3NA6JKL5hhFu1sJX0Mnn/A=="],
+
+    "@jridgewell/sourcemap-codec": ["@jridgewell/sourcemap-codec@1.5.0", "", {}, "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ=="],
+
+    "@jridgewell/trace-mapping": ["@jridgewell/trace-mapping@0.3.25", "", { "dependencies": { "@jridgewell/resolve-uri": "^3.1.0", "@jridgewell/sourcemap-codec": "^1.4.14" } }, "sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ=="],
+
+    "@threlte/core": ["@threlte/core@8.0.1", "", { "dependencies": { "mitt": "^3.0.1" }, "peerDependencies": { "svelte": ">=5", "three": ">=0.155" } }, "sha512-vy1xRQppJFNmfPTeiRQue+KmYFsbPgVhwuYXRTvVrwPeD2oYz43gxUeOpe1FACeGKxrxZykeKJF5ebVvl7gBxw=="],
+
+    "@types/estree": ["@types/estree@1.0.6", "", {}, "sha512-AYnb1nQyY49te+VRAVgmzfcgjYS91mY5P0TKUDCLEM+gNnA+3T6rWITXRLYCpahpqSQbN5cE+gHpnPyXjHWxcw=="],
+
+    "@types/node": ["@types/node@22.13.5", "", { "dependencies": { "undici-types": "~6.20.0" } }, "sha512-+lTU0PxZXn0Dr1NBtC7Y8cR21AJr87dLLU953CWA6pMxxv/UDc7jYAY90upcrie1nRcD6XNG5HOYEDtgW5TxAg=="],
+
+    "@types/ws": ["@types/ws@8.5.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-bd/YFLW+URhBzMXurx7lWByOu+xzU9+kb3RboOteXYDfW+tr+JZa99OyNmPINEGB/ahzKrEuc8rcv4gnpJmxTw=="],
+
+    "acorn": ["acorn@8.14.0", "", { "bin": { "acorn": "bin/acorn" } }, "sha512-cl669nCJTZBsL97OF4kUQm5g5hC2uihk0NxY3WENAC0TYdILVkAyHymAntgxGkl7K+t0cXIrH5siy5S4XkFycA=="],
+
+    "acorn-typescript": ["acorn-typescript@1.4.13", "", { "peerDependencies": { "acorn": ">=8.9.0" } }, "sha512-xsc9Xv0xlVfwp2o7sQ+GCQ1PgbkdcpWdTzrwXxO3xDMTAywVS3oXVOcOHuRjAPkS4P9b+yc/qNF15460v+jp4Q=="],
+
+    "aria-query": ["aria-query@5.3.2", "", {}, "sha512-COROpnaoap1E2F000S62r6A60uHZnmlvomhfyT2DlTcrY1OrBKn2UhH7qn5wTC9zMvD0AY7csdPSNwKP+7WiQw=="],
+
+    "axobject-query": ["axobject-query@4.1.0", "", {}, "sha512-qIj0G9wZbMGNLjLmg1PT6v2mE9AH2zlnADJD/2tC6E00hgmhUOfEB6greHPAfLRSufHqROIUTkw6E+M3lH0PTQ=="],
+
+    "bun-types": ["bun-types@1.2.4-canary.20250226T140704", "", { "dependencies": { "@types/node": "*", "@types/ws": "~8.5.10" } }, "sha512-P8b2CGLtbvi/kQ4dPHBhU5qkguIjHMYCjNqjWDTKSnodWDTbcv9reBdktZJ7m5SF4m15JLthfFq2PtwKpA9a+w=="],
+
+    "clsx": ["clsx@2.1.1", "", {}, "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA=="],
+
+    "esm-env": ["esm-env@1.2.2", "", {}, "sha512-Epxrv+Nr/CaL4ZcFGPJIYLWFom+YeV1DqMLHJoEd9SYRxNbaFruBwfEX/kkHUJf55j2+TUbmDcmuilbP1TmXHA=="],
+
+    "esrap": ["esrap@1.4.5", "", { "dependencies": { "@jridgewell/sourcemap-codec": "^1.4.15" } }, "sha512-CjNMjkBWWZeHn+VX+gS8YvFwJ5+NDhg8aWZBSFJPR8qQduDNjbJodA2WcwCm7uQa5Rjqj+nZvVmceg1RbHFB9g=="],
+
+    "is-reference": ["is-reference@3.0.3", "", { "dependencies": { "@types/estree": "^1.0.6" } }, "sha512-ixkJoqQvAP88E6wLydLGGqCJsrFUnqoH6HnaczB8XmDH1oaWU+xxdptvikTgaEhtZ53Ky6YXiBuUI2WXLMCwjw=="],
+
+    "locate-character": ["locate-character@3.0.0", "", {}, "sha512-SW13ws7BjaeJ6p7Q6CO2nchbYEc3X3J6WrmTTDto7yMPqVSZTUyY5Tjbid+Ab8gLnATtygYtiDIJGQRRn2ZOiA=="],
+
+    "magic-string": ["magic-string@0.30.17", "", { "dependencies": { "@jridgewell/sourcemap-codec": "^1.5.0" } }, "sha512-sNPKHvyjVf7gyjwS4xGTaW/mCnF8wnjtifKBEhxfZ7E/S8tQ0rssrwGNn6q8JH/ohItJfSQp9mBtQYuTlH5QnA=="],
+
+    "mitt": ["mitt@3.0.1", "", {}, "sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw=="],
+
+    "svelte": ["svelte@5.20.4", "", { "dependencies": { "@ampproject/remapping": "^2.3.0", "@jridgewell/sourcemap-codec": "^1.5.0", "@types/estree": "^1.0.5", "acorn": "^8.12.1", "acorn-typescript": "^1.4.13", "aria-query": "^5.3.1", "axobject-query": "^4.1.0", "clsx": "^2.1.1", "esm-env": "^1.2.1", "esrap": "^1.4.3", "is-reference": "^3.0.3", "locate-character": "^3.0.0", "magic-string": "^0.30.11", "zimmerframe": "^1.1.2" } }, "sha512-2Mo/AfObaw9zuD0u1JJ7sOVzRCGcpETEyDkLbtkcctWpCMCIyT0iz83xD8JT29SR7O4SgswuPRIDYReYF/607A=="],
+
+    "three": ["three@0.174.0", "", {}, "sha512-p+WG3W6Ov74alh3geCMkGK9NWuT62ee21cV3jEnun201zodVF4tCE5aZa2U122/mkLRmhJJUQmLLW1BH00uQJQ=="],
+
+    "undici-types": ["undici-types@6.20.0", "", {}, "sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg=="],
+
+    "zimmerframe": ["zimmerframe@1.1.2", "", {}, "sha512-rAbqEGa8ovJy4pyBxZM70hg4pE6gDgaQ0Sl9M3enG3I0d6H4XSAM3GeNGLKnsBpuijUow064sf7ww1nutC5/3w=="],
+  }
+}

packages/bun-plugin-svelte/example/App.svelte

@@ -0,0 +1,311 @@
+<script lang="ts">
+  import FeatureCard from "./FeatureCard.svelte";
+
+  const links = [
+    { text: "Bun Documentation", url: "https://bun.sh/docs" },
+    { text: "Svelte Documentation", url: "https://svelte.dev/docs" },
+    { text: "GitHub", url: "https://github.com/oven-sh/bun/tree/main/packages/bun-plugin-svelte" },
+  ];
+</script>
+
+<main>
+  <div class="hero">
+    <div class="logo-container">
+      <a href="https://bun.sh" class="bun-logo">
+        <img
+          src="https://github.com/user-attachments/assets/50282090-adfd-4ddb-9e27-c30753c6b161"
+          alt="Bun Logo"
+          height="42"
+        />
+      </a>
+    </div>
+    <h1><span class="highlight">bun-plugin-svelte</span></h1>
+    <p class="tagline">The official Svelte plugin for <a href="https://bun.sh" target="_blank">Bun</a></p>
+
+    <div class="cta-buttons">
+      <a href="https://bun.sh/docs/bundler/html" class="button primary">🚀 Get Started</a>
+      <a href="https://github.com/oven-sh/bun/tree/main/packages/bun-plugin-svelte/example" class="button secondary"
+        >👀 View Examples</a
+      >
+    </div>
+  </div>
+
+  <section class="usage">
+    <h2>🏃‍➡️ Quick Start</h2>
+
+    <div class="flex-grid">
+      <div>
+        <h3>1. Install from <a href="https://npmjs.com/package/bun-plugin-svelte" target="_blank">NPM</a></h3>
+        <pre><code class="language-bash">bun add -D bun-plugin-svelte</code></pre>
+      </div>
+      <div>
+        <h3>2. Add it to your <a href="https://bun.sh/docs/runtime/bunfig" target="_blank">bunfig.toml</a></h3>
+        <pre><code class="language-toml">
+[serve.static]
+plugins = ["bun-plugin-svelte"];
+        </code></pre>
+      </div>
+    </div>
+  </section>
+
+  <section class="features">
+    <h2>✨ Features</h2>
+    <div class="feature-grid">
+      <FeatureCard title="🔥 HMR Support" link="https://bun.sh/docs/bundler/html">
+        Integrates with Bun's Fullstack Dev Server for hot module replacement
+      </FeatureCard>
+      <FeatureCard title="📦 Bundling" link="https://bun.sh/docs/bundler">
+        Bundle Svelte components with <a href="https://bun.sh/docs/bundler">Bun.build</a>
+      </FeatureCard>
+    </div>
+
+    <section class="resources">
+      <h2>📖 Resources</h2>
+      <ul class="resource-links">
+        {#each links as link}
+          <li><a href={link.url} target="_blank" rel="noopener noreferrer">{link.text}</a></li>
+        {/each}
+      </ul>
+    </section>
+
+    <footer>
+      <p>Made with ❤️ by the Bun team</p>
+    </footer>
+  </section>
+</main>
+
+<style>
+  :global(body) {
+    margin: 0;
+    padding: 0;
+    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
+      "Helvetica Neue", sans-serif;
+    background-color: #f9f9f9;
+    color: #333;
+  }
+  :global(a) {
+    color: #ff3e00;
+    text-decoration: none;
+    position: relative;
+  }
+
+  :global(a::after) {
+    content: "";
+    position: absolute;
+    width: 100%;
+    height: 1px;
+    bottom: 0;
+    left: 0;
+    background-color: #ff3e00;
+    transform: scaleX(0);
+    transform-origin: bottom right;
+    transition: transform 0.3s ease-out;
+  }
+
+  :global(a:hover::after) {
+    transform: scaleX(1);
+    transform-origin: bottom left;
+  }
+
+  :global(a:visited) {
+    color: #ff3e00;
+  }
+
+  :global(pre > code.hljs) {
+    padding: 0;
+  }
+
+  main {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 2rem;
+  }
+
+  .hero {
+    text-align: center;
+    padding: 3rem 1rem;
+    margin-bottom: 2rem;
+    display: flex;
+    flex-direction: column;
+  }
+
+  .logo-container {
+    margin-bottom: 1.5rem;
+    margin: auto 25%;
+  }
+
+  .bun-logo {
+    display: block;
+    transition: transform 0.3s ease;
+  }
+
+  .bun-logo:hover {
+    transform: scale(1.05);
+  }
+
+  .bun-logo img {
+    max-width: 33vw;
+    height: auto;
+  }
+
+  h1 {
+    font-size: 2.5rem;
+    margin-bottom: 0.5rem;
+  }
+
+  .highlight {
+    color: #ff3e00;
+    font-weight: bold;
+  }
+
+  /* Don't apply the underline effect to buttons and resource links */
+  .button::after,
+  .resource-links li a::after,
+  .bun-logo::after {
+    display: none;
+  }
+
+  .tagline {
+    font-size: 1.2rem;
+    color: #666;
+    margin-bottom: 2rem;
+  }
+
+  .cta-buttons {
+    display: flex;
+    justify-content: center;
+    gap: 1rem;
+    margin-bottom: 2rem;
+  }
+
+  .button {
+    display: inline-block;
+    padding: 0.8rem 1.5rem;
+    border-radius: 4px;
+    text-decoration: none;
+    font-weight: 600;
+    transition: all 0.2s ease;
+  }
+
+  .button.primary {
+    background-color: #ff3e00;
+    color: white;
+    box-shadow: 0 2px 10px rgba(255, 62, 0, 0.2);
+  }
+
+  .button.primary:hover {
+    background-color: #e63600;
+    transform: translateY(-2px);
+    box-shadow: 0 4px 12px rgba(255, 62, 0, 0.3);
+  }
+
+  .button.secondary {
+    background-color: #f0f0f0;
+    color: #333;
+    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
+  }
+
+  .button.secondary:hover {
+    background-color: #e6e6e6;
+    transform: translateY(-2px);
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+  }
+
+  section {
+    margin-bottom: 3rem;
+    padding: 2rem;
+    background-color: white;
+    border-radius: 8px;
+    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
+  }
+
+  h2 {
+    font-size: 1.8rem;
+    margin-bottom: 1.5rem;
+    color: #333;
+    border-bottom: 2px solid #f0f0f0;
+    padding-bottom: 0.5rem;
+  }
+
+  .flex-grid {
+    display: flex;
+    gap: 1.5rem;
+  }
+  .flex-grid > div {
+    flex: 1;
+  }
+
+  .feature-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
+    gap: 1.5rem;
+    margin-bottom: 2rem;
+  }
+
+  pre {
+    background-color: #f5f5f5;
+    padding: 1rem;
+    border-radius: 4px;
+    overflow-x: auto;
+    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
+    font-size: 0.9rem;
+    line-height: 1.5;
+  }
+
+  code {
+    color: #333;
+  }
+
+  .resource-links {
+    list-style: none;
+    padding: 0;
+    display: flex;
+    flex-wrap: wrap;
+    gap: 1rem;
+  }
+
+  .resource-links li a {
+    display: inline-block;
+    padding: 0.5rem 1rem;
+    background-color: #f5f5f5;
+    color: #333;
+    text-decoration: none;
+    border-radius: 4px;
+    transition: all 0.2s ease;
+  }
+
+  .resource-links li a:hover {
+    background-color: #ff3e00;
+    color: white;
+    transform: translateY(-2px);
+  }
+
+  footer {
+    text-align: center;
+    padding: 2rem 0;
+    color: #666;
+    font-size: 0.9rem;
+  }
+
+  @media (max-width: 768px) {
+    .feature-grid {
+      grid-template-columns: 1fr;
+    }
+
+    .cta-buttons {
+      flex-direction: column;
+      align-items: center;
+    }
+
+    .button {
+      width: 100%;
+      max-width: 300px;
+      margin-bottom: 0.5rem;
+      text-align: center;
+    }
+
+    .resource-links {
+      flex-direction: column;
+    }
+  }
+</style>

packages/bun-plugin-svelte/example/FeatureCard.svelte

@@ -0,0 +1,28 @@
+<script lang="ts">
+  let { title, link, children } = $props();
+</script>
+
+<div class="feature-card">
+  <h3>
+    <a href={link}>
+      {title}
+    </a>
+  </h3>
+  <p>
+    {@render children()}
+  </p>
+</div>
+
+<style>
+  .feature-card {
+    padding: 1rem;
+    border-radius: 0.5rem;
+    background-color: #fff;
+    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+    transition: transform 0.3s ease;
+  }
+
+  .feature-card h3 {
+    margin-bottom: 0.5rem;
+  }
+</style>

packages/bun-plugin-svelte/example/bunfig.toml

@@ -0,0 +1,2 @@
+[serve.static]
+plugins = ["bun-plugin-svelte"]

packages/bun-plugin-svelte/example/index.html

@@ -0,0 +1,25 @@
+<html>
+  <head>
+    <script type="module" src="./index.ts"></script>
+
+    <link rel="prefetch" href="https://bun.sh/docs/bundler/plugins" />
+    <link rel="preconnect" href="https://bun.sh" />
+    <link rel="preconnect" href="https://github.com" />
+
+    <link
+      rel="stylesheet"
+      href="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.9.0/build/styles/default.min.css"
+    />
+    <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.9.0/build/highlight.min.js"></script>
+
+    <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.9.0/build/languages/toml.min.js"></script>
+
+    <script>
+      hljs.highlightAll();
+    </script>
+  </head>
+
+  <body>
+    <div id="root"></div>
+  </body>
+</html>

packages/bun-plugin-svelte/example/index.ts

@@ -0,0 +1,29 @@
+import { mount, unmount } from "svelte";
+import App from "./App.svelte";
+
+declare global {
+  var didMount: boolean | undefined;
+  var hljs: any;
+}
+
+let app: Record<string, any> | undefined;
+
+// mount the application entrypoint to the DOM on first load. On subsequent hot
+// updates, the app will be unmounted and re-mounted via the accept handler.
+
+const root = document.getElementById("root")!;
+if (!globalThis.didMount) {
+  app = mount(App, { target: root });
+}
+globalThis.didMount = true;
+
+if (import.meta.hot) {
+  import.meta.hot.accept(async () => {
+    // avoid unmounting twice when another update gets accepted while outros are playing
+    if (!app) return;
+    const prevApp = app;
+    app = undefined;
+    await unmount(prevApp, { outro: true });
+    app = mount(App, { target: root });
+  });
+}

packages/bun-plugin-svelte/package.json

@@ -0,0 +1,42 @@
+{
+  "name": "bun-plugin-svelte",
+  "version": "0.0.6",
+  "description": "Official Svelte plugin for Bun",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/oven-sh/bun",
+    "directory": "packages/bun-plugin-svelte"
+  },
+  "homepage": "https://bun.sh",
+  "license": "MIT",
+  "type": "module",
+  "module": "src/index.ts",
+  "index": "src/index.ts",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "scripts": {
+    "example": "bun --config=./example/bunfig.toml example/index.html",
+    "lint": "oxlint .",
+    "fmt": "prettier --write .",
+    "check:types": "tsc --noEmit",
+    "build:types": "tsc --emitDeclarationOnly --declaration --declarationDir ./dist"
+  },
+  "devDependencies": {
+    "bun-types": "canary",
+    "svelte": "^5.20.4",
+    "@threlte/core": "8.0.1"
+  },
+  "peerDependencies": {
+    "svelte": "^5"
+  },
+  "files": [
+    "README.md",
+    "bunfig.toml",
+    "tsconfig.json",
+    "modules.d.ts",
+    "dist",
+    "src",
+    "!src/**/*.spec.ts"
+  ]
+}

packages/bun-plugin-svelte/src/index.spec.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from "bun:test";
+import { SveltePlugin } from "./index";
+
+describe("SveltePlugin", () => {
+  it.each([true, false, 0, 1, "hi"])("throws if passed a non-object (%p)", (badOptions: any) => {
+    expect(() => SveltePlugin(badOptions)).toThrow(TypeError);
+  });
+  it("may be nullish or not provided", () => {
+    expect(() => SveltePlugin()).not.toThrow();
+    expect(() => SveltePlugin(null as any)).not.toThrow();
+    expect(() => SveltePlugin(undefined)).not.toThrow();
+  });
+
+  it.each([1, "hi", {}, "Client"])("throws if forceSide is not 'client' or 'server' (%p)", (forceSide: any) => {
+    expect(() => SveltePlugin({ forceSide })).toThrow(TypeError);
+  });
+
+  it.each([null, undefined])("forceSide may be nullish", (forceSide: any) => {
+    expect(() => SveltePlugin({ forceSide })).not.toThrow();
+  });
+});

packages/bun-plugin-svelte/src/index.ts

@@ -0,0 +1,144 @@
+import type { BunPlugin, BuildConfig, OnLoadResult } from "bun";
+import { basename } from "node:path";
+import { compile, compileModule } from "svelte/compiler";
+import {
+  getBaseCompileOptions,
+  validateOptions,
+  type SvelteOptions,
+  hash,
+  getBaseModuleCompileOptions,
+} from "./options";
+
+const kEmptyObject = Object.create(null);
+const virtualNamespace = "bun-svelte";
+
+function SveltePlugin(options: SvelteOptions = kEmptyObject as SvelteOptions): BunPlugin {
+  if (options != null) validateOptions(options);
+
+  /**
+   * import specifier -> CSS source code
+   */
+  const virtualCssModules = new Map<string, VirtualCSSModule>();
+  type VirtualCSSModule = {
+    /** Path to the svelte file whose css this is for */
+    sourcePath: string;
+    /** Source code  */
+    source: string;
+  };
+
+  return {
+    name: "bun-plugin-svelte",
+    setup(builder) {
+      // resolve "svelte" export conditions
+      //
+      // FIXME: the dev server does not currently respect bundler configs; it
+      // just passes a fake one to plugins and then never uses it. we need to to
+      // update it to ~not~ do this.
+      if (builder?.config) {
+        var conditions = builder.config.conditions ?? [];
+        if (typeof conditions === "string") {
+          conditions = [conditions];
+        }
+        conditions.push("svelte");
+        builder.config.conditions = conditions;
+      }
+
+      const { config = kEmptyObject as Partial<BuildConfig> } = builder;
+      const baseCompileOptions = getBaseCompileOptions(options ?? (kEmptyObject as Partial<SvelteOptions>), config);
+      const baseModuleCompileOptions = getBaseModuleCompileOptions(
+        options ?? (kEmptyObject as Partial<SvelteOptions>),
+        config,
+      );
+
+      const ts = new Bun.Transpiler({
+        loader: "ts",
+        target: config.target,
+      });
+
+      builder
+        .onLoad({ filter: /\.svelte$/ }, async function onLoadSvelte(args) {
+          const { path } = args;
+
+          const sourceText = await Bun.file(path).text();
+
+          const side =
+            args && "side" in args // "side" only passed when run from dev server
+              ? (args as { side: "client" | "server" }).side
+              : "server";
+          const generate = baseCompileOptions.generate ?? side;
+
+          const hmr = Boolean((args as { hmr?: boolean })["hmr"] ?? process.env.NODE_ENV !== "production");
+          const result = compile(sourceText, {
+            ...baseCompileOptions,
+            generate,
+            filename: args.path,
+            hmr,
+          });
+
+          var { js, css } = result;
+          if (css?.code && generate != "server") {
+            const uid = `${basename(path)}-${hash(path)}-style`.replaceAll(`"`, `'`);
+            const virtualName = virtualNamespace + ":" + uid + ".css";
+            virtualCssModules.set(virtualName, { sourcePath: path, source: css.code });
+            js.code += `\nimport "${virtualName}";`;
+          }
+
+          return {
+            contents: result.js.code,
+            loader: "ts",
+          } satisfies OnLoadResult;
+          // TODO: allow plugins to return multiple results.
+          // TODO: support layered sourcemaps
+        })
+        .onLoad({ filter: /\.svelte.[tj]s$/ }, async function onLoadSvelteModule(args) {
+          const { path } = args;
+
+          const side =
+            args && "side" in args // "side" only passed when run from dev server
+              ? (args as { side: "client" | "server" }).side
+              : "server";
+          const generate = baseModuleCompileOptions.generate ?? side;
+
+          var sourceText = await Bun.file(path).text();
+          if (path.endsWith(".ts")) {
+            sourceText = await ts.transform(sourceText);
+          }
+          const result = compileModule(sourceText, {
+            ...baseModuleCompileOptions,
+            generate,
+            filename: args.path,
+          });
+
+          // NOTE: we assume js/ts modules won't have CSS blocks in them, so no
+          // virtual modules get created.
+          return {
+            contents: result.js.code,
+            loader: "js",
+          };
+        })
+        .onResolve({ filter: /^bun-svelte:/ }, args => {
+          return {
+            path: args.path,
+            namespace: "bun-svelte",
+          };
+        })
+        .onLoad({ filter: /\.css$/, namespace: virtualNamespace }, args => {
+          const { path } = args;
+
+          const mod = virtualCssModules.get(path);
+          if (!mod) throw new Error("Virtual CSS module not found: " + path);
+          const { sourcePath, source } = mod;
+          virtualCssModules.delete(path);
+
+          return {
+            contents: source,
+            loader: "css",
+            watchFiles: [sourcePath],
+          };
+        });
+    },
+  };
+}
+
+export default SveltePlugin({ development: true }) as BunPlugin;
+export { SveltePlugin, type SvelteOptions };

packages/bun-plugin-svelte/src/modules.d.ts

@@ -0,0 +1,4 @@
+declare module "*.svelte" {
+  const content: any;
+  export default content;
+}

packages/bun-plugin-svelte/src/options.spec.ts

@@ -0,0 +1,54 @@
+import { describe, beforeAll, it, expect } from "bun:test";
+import type { BuildConfig } from "bun";
+import type { CompileOptions } from "svelte/compiler";
+
+import { getBaseCompileOptions, validateOptions, type SvelteOptions } from "./options";
+
+describe("getBaseCompileOptions", () => {
+  describe("when no options are provided", () => {
+    const pluginOptions: SvelteOptions = {};
+    let fullDefault: Readonly<CompileOptions>;
+
+    beforeAll(() => {
+      fullDefault = Object.freeze(getBaseCompileOptions(pluginOptions, {}));
+    });
+
+    it("when minification is disabled, whitespace and comments are preserved", () => {
+      expect(getBaseCompileOptions(pluginOptions, { minify: false })).toEqual(
+        expect.objectContaining({
+          preserveWhitespace: true,
+          preserveComments: true,
+        }),
+      );
+    });
+
+    it("defaults to production mode", () => {
+      expect(fullDefault.dev).toBeFalse();
+    });
+  });
+
+  it.each([{}, { side: "server" }, { side: "client" }, { side: undefined }] as Partial<BuildConfig>[])(
+    "when present, forceSide takes precedence over config (%o)",
+    buildConfig => {
+      expect(getBaseCompileOptions({ forceSide: "client" }, buildConfig)).toEqual(
+        expect.objectContaining({
+          generate: "client",
+        }),
+      );
+      expect(getBaseCompileOptions({ forceSide: "server" }, buildConfig)).toEqual(
+        expect.objectContaining({
+          generate: "server",
+        }),
+      );
+    },
+  );
+}); // getBaseCompileOptions
+
+describe("validateOptions(options)", () => {
+  it.each(["", 1, null, undefined, true, false, Symbol("hi")])(
+    "throws if options is not an object (%p)",
+    (badOptions: any) => {
+      expect(() => validateOptions(badOptions)).toThrow();
+    },
+  );
+}); // validateOptions

packages/bun-plugin-svelte/src/options.ts

@@ -0,0 +1,134 @@
+import { strict as assert } from "node:assert";
+import { type BuildConfig } from "bun";
+import type { CompileOptions, ModuleCompileOptions } from "svelte/compiler";
+
+type OverrideCompileOptions = Pick<CompileOptions, "customElement" | "runes" | "modernAst" | "namespace">;
+export interface SvelteOptions extends Pick<CompileOptions, "runes"> {
+  /**
+   * Force client-side or server-side generation.
+   *
+   * By default, this plugin will detect the side of the build based on how
+   * it's used. For example, `"client"` code will be generated when used with {@link Bun.build}.
+   */
+  forceSide?: "client" | "server";
+
+  /**
+   * When `true`, this plugin will generate development-only checks and other
+   * niceties.
+   *
+   * When `false`, this plugin will generate production-ready code
+   *
+   * Defaults to `true` when run via Bun's dev server, `false` otherwise.
+   */
+  development?: boolean;
+
+  /**
+   * Options to forward to the Svelte compiler.
+   */
+  compilerOptions?: OverrideCompileOptions;
+}
+
+/**
+ * @internal
+ */
+export function validateOptions(options: unknown): asserts options is SvelteOptions {
+  assert(options && typeof options === "object", new TypeError("bun-svelte-plugin: options must be an object"));
+  const opts = options as Record<keyof SvelteOptions, unknown>;
+
+  if (opts.forceSide != null) {
+    if (typeof opts.forceSide !== "string") {
+      throw new TypeError("bun-svelte-plugin: forceSide must be a string, got " + typeof opts.forceSide);
+    }
+    switch (opts.forceSide) {
+      case "client":
+      case "server":
+        break;
+      default:
+        throw new TypeError(`bun-svelte-plugin: forceSide must be either 'client' or 'server', got ${opts.forceSide}`);
+    }
+  }
+
+  if (opts.compilerOptions) {
+    if (typeof opts.compilerOptions !== "object") {
+      throw new TypeError("bun-svelte-plugin: compilerOptions must be an object");
+    }
+  }
+}
+
+/**
+ * @internal
+ */
+export function getBaseCompileOptions(pluginOptions: SvelteOptions, config: Partial<BuildConfig>): CompileOptions {
+  let {
+    development = false,
+    compilerOptions: { customElement, runes, modernAst, namespace } = kEmptyObject as OverrideCompileOptions,
+  } = pluginOptions;
+  const { minify = false } = config;
+
+  const shouldMinify = Boolean(minify);
+  const {
+    whitespace: minifyWhitespace,
+    syntax: _minifySyntax,
+    identifiers: _minifyIdentifiers,
+  } = typeof minify === "object"
+    ? minify
+    : {
+        whitespace: shouldMinify,
+        syntax: shouldMinify,
+        identifiers: shouldMinify,
+      };
+
+  const generate = generateSide(pluginOptions, config);
+
+  return {
+    css: "external",
+    generate,
+    preserveWhitespace: !minifyWhitespace,
+    preserveComments: !shouldMinify,
+    dev: development,
+    customElement,
+    runes,
+    modernAst,
+    namespace,
+    cssHash({ css }) {
+      // same prime number seed used by svelte/compiler.
+      // TODO: ensure this provides enough entropy
+      return `svelte-${hash(css)}`;
+    },
+  };
+}
+
+export function getBaseModuleCompileOptions(
+  pluginOptions: SvelteOptions,
+  config: Partial<BuildConfig>,
+): ModuleCompileOptions {
+  const { development = false } = pluginOptions;
+  const generate = generateSide(pluginOptions, config);
+  return {
+    dev: development,
+    generate,
+  };
+}
+
+function generateSide(pluginOptions: SvelteOptions, config: Partial<BuildConfig>) {
+  let { forceSide } = pluginOptions;
+  const { target } = config;
+
+  if (forceSide == null && typeof target === "string") {
+    switch (target) {
+      case "browser":
+        forceSide = "client";
+        break;
+      case "node":
+      case "bun":
+        forceSide = "server";
+        break;
+      default:
+      // warn? throw?
+    }
+  }
+  return forceSide;
+}
+
+export const hash = (content: string): string => Bun.hash(content, 5381).toString(36);
+const kEmptyObject = Object.create(null);

packages/bun-plugin-svelte/test/__snapshots__/index.test.ts.snap

@@ -0,0 +1,91 @@
+// Bun Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Bun.plugin using { forceSide: 'server' } allows for imported components to be SSR'd: foo.svelte - head 1`] = `""`;
+
+exports[`Bun.plugin using { forceSide: 'server' } allows for imported components to be SSR'd: foo.svelte - body 1`] = `
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+`;
+
+exports[`Bun.plugin Generates server-side code: foo.svelte - head 1`] = `""`;
+
+exports[`Bun.plugin Generates server-side code: foo.svelte - body 1`] = `
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+`;
+
+exports[`Bun.build Generates server-side code when targeting "node" or "bun": foo.svelte - server-side (node) 1`] = `
+{
+  "body": 
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+,
+  "head": "",
+  "html": 
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+,
+}
+`;
+
+exports[`Bun.build Generates server-side code when targeting "node" or "bun": foo.svelte - server-side (bun) 1`] = `
+{
+  "body": 
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+,
+  "head": "",
+  "html": 
+"<!--[--><!---->
+
+<main class="app svelte-30r5b3lexyb64">
+  <h1 class="svelte-30r5b3lexyb64">Hello World!</h1>
+</main>
+
+<!--]-->"
+,
+}
+`;
+
+exports[`Bun.build Generates client-side code when targeting 'browser': foo.svelte - client-side 1`] = `
+"// test/fixtures/foo.svelte
+var foo_default = "./foo-y5ajevk1.svelte";
+export {
+  foo_default as default
+};
+"
+`;
+
+exports[`Bun.build Generates client-side code when targeting 'browser': foo.svelte - client-side index 1`] = `
+"// test/fixtures/foo.svelte
+var foo_default = "./foo-y5ajevk1.svelte";
+export {
+  foo_default as default
+};
+"
+`;

packages/bun-plugin-svelte/test/fixtures/foo.svelte

@@ -0,0 +1,19 @@
+<script>
+  let name = "World";
+</script>
+
+<main class="app">
+  <h1>Hello {name}!</h1>
+</main>
+
+<style>
+  h1 {
+      color: #ff3e00;
+      text-align: center;
+      font-size: 2em;
+    font-weight: 100;
+  }
+  .app {
+    box-sizing: border-box;
+  }
+</style>

packages/bun-plugin-svelte/test/fixtures/svelte-export-condition.svelte

@@ -0,0 +1,17 @@
+<script>
+  import { Canvas } from "@threlte/core";
+  let name = "Bun";
+</script>
+
+<main class="app">
+  <h1>Cookin up apps with {name}</h1>
+  <Canvas />
+</main>
+
+<style>
+  h1 {
+    color: #ff3e00;
+    text-align: center;
+    font-size: 2em;
+  }
+</style>

packages/bun-plugin-svelte/test/fixtures/todo-cjs.svelte.ts

@@ -0,0 +1,15 @@
+class Todo {
+  title: string | undefined = $state();
+  done: boolean = $state(false);
+  createdAt: Date = $state(new Date());
+
+  constructor(title: string) {
+    this.title = title;
+  }
+
+  public toggle(): void {
+    this.done = !this.done;
+  }
+}
+
+module.exports = Todo;

packages/bun-plugin-svelte/test/fixtures/todo.svelte.ts

@@ -0,0 +1,13 @@
+export class Todo {
+  title: string | undefined = $state();
+  done: boolean = $state(false);
+  createdAt: Date = $state(new Date());
+
+  constructor(title: string) {
+    this.title = title;
+  }
+
+  public toggle(): void {
+    this.done = !this.done;
+  }
+}

packages/bun-plugin-svelte/test/fixtures/with-cjs.svelte

@@ -0,0 +1,25 @@
+<script lang="ts">
+  const Todo = require("./todo-cjs.svelte.ts");
+
+  let name = "World";
+  let todo: Todo = $state(new Todo("Hello World!"));
+</script>
+
+<main class="app">
+  <h1>Hello {todo.title}!</h1>
+  <!-- clicking calls toggle -->
+  <input type="checkbox" bind:checked={todo.done} />
+  <button onclick={todo.toggle}>Toggle</button>
+</main>
+
+<style>
+  h1 {
+    color: #ff3e00;
+    text-align: center;
+    font-size: 2em;
+    font-weight: 100;
+  }
+  .app {
+    box-sizing: border-box;
+  }
+</style>

packages/bun-plugin-svelte/test/fixtures/with-modules.svelte

@@ -0,0 +1,25 @@
+<script lang="ts">
+  import { Todo } from "./todo.svelte";
+
+  let name = "World";
+  let todo: Todo = $state(new Todo("Hello World!"));
+</script>
+
+<main class="app">
+  <h1>Hello {todo.title}!</h1>
+  <!-- clicking calls toggle -->
+  <input type="checkbox" bind:checked={todo.done} />
+  <button onclick={todo.toggle}>Toggle</button>
+</main>
+
+<style>
+  h1 {
+    color: #ff3e00;
+    text-align: center;
+    font-size: 2em;
+    font-weight: 100;
+  }
+  .app {
+    box-sizing: border-box;
+  }
+</style>

packages/bun-plugin-svelte/test/index.test.ts

@@ -0,0 +1,157 @@
+import { describe, beforeAll, it, expect, afterEach, afterAll } from "bun:test";
+import path from "node:path";
+import fs from "node:fs";
+import os from "node:os";
+import { render } from "svelte/server";
+import { SveltePlugin } from "../src";
+import type { BuildOutput } from "bun";
+
+const fixturePath = (...segs: string[]) => path.join(import.meta.dirname, "fixtures", ...segs);
+
+// temp dir that gets deleted after all tests
+let outdir: string;
+
+beforeAll(() => {
+  const prefix = `svelte-test-${Math.random().toString(36).substring(2, 15)}`;
+  outdir = fs.mkdtempSync(path.join(os.tmpdir(), prefix));
+});
+
+afterAll(() => {
+  try {
+    fs.rmSync(outdir, { recursive: true, force: true });
+  } catch {
+    // suppress
+  }
+});
+
+describe("given a hello world component", () => {
+  const entrypoints = [fixturePath("foo.svelte")];
+  it("when no options are provided, builds successfully", async () => {
+    const res = await Bun.build({
+      entrypoints,
+      outdir,
+      plugins: [SveltePlugin()],
+    });
+    expect(res.success).toBeTrue();
+  });
+
+  describe("when a custom element is provided", () => {
+    let res: BuildOutput;
+
+    beforeAll(async () => {
+      res = await Bun.build({
+        entrypoints,
+        outdir,
+        plugins: [SveltePlugin({ compilerOptions: { customElement: true } })],
+      });
+    });
+
+    it("builds successfully", () => {
+      expect(res.success).toBeTrue();
+    });
+  });
+});
+
+describe("when importing `.svelte.ts` files with ESM", () => {
+  let res: BuildOutput;
+
+  beforeAll(async () => {
+    res = await Bun.build({
+      entrypoints: [fixturePath("with-modules.svelte")],
+      outdir,
+      plugins: [SveltePlugin()],
+    });
+  });
+
+  it("builds successfully", () => {
+    expect(res.success).toBeTrue();
+  });
+
+  it(`handles "svelte" export condition`, async () => {
+    const res = await Bun.build({
+      entrypoints: [fixturePath("svelte-export-condition.svelte")],
+      outdir,
+      plugins: [SveltePlugin()],
+    });
+    expect(res.success).toBeTrue();
+  });
+});
+
+describe("when importing `.svelte.ts` files with CJS", () => {
+  let res: BuildOutput;
+
+  beforeAll(async () => {
+    res = await Bun.build({
+      entrypoints: [fixturePath("with-cjs.svelte")],
+      outdir,
+      plugins: [SveltePlugin()],
+    });
+  });
+
+  it("builds successfully", () => {
+    expect(res.success).toBeTrue();
+  });
+
+  it("does not double-wrap the module with function(module, exports, __filename, __dirname)", async () => {
+    const ts = res.outputs.find(output => output.loader === "ts");
+    expect(ts).toBeDefined();
+    const code = await ts!.text();
+    expect(code).toContain("require_todo_cjs_svelte");
+    expect(code).toContain("var require_todo_cjs_svelte = __commonJS((exports, module) => {\n");
+  });
+});
+
+describe("Bun.build", () => {
+  it.each(["node", "bun"] as const)('Generates server-side code when targeting "node" or "bun"', async target => {
+    const res = await Bun.build({
+      entrypoints: [fixturePath("foo.svelte")],
+      outdir,
+      target,
+      plugins: [SveltePlugin({ forceSide: "server" })],
+    });
+    expect(res.success).toBeTrue();
+    const componentPath = res.outputs[0].path;
+    const component = await import(componentPath);
+    expect(component.default).toBeTypeOf("function");
+    expect(render(component.default)).toMatchSnapshot(`foo.svelte - server-side (${target})`);
+  });
+
+  it("Generates client-side code when targeting 'browser'", async () => {
+    const res = await Bun.build({
+      entrypoints: [fixturePath("foo.svelte")],
+      outdir,
+      target: "browser",
+    });
+
+    expect(res.success).toBeTrue();
+    const componentPath = path.resolve(res.outputs[0].path);
+    const entrypoint = await res.outputs[0].text();
+    expect(entrypoint).toMatchSnapshot(`foo.svelte - client-side index`);
+    expect(await Bun.file(componentPath).text()).toMatchSnapshot(`foo.svelte - client-side`);
+  });
+});
+
+describe("Bun.plugin", () => {
+  afterEach(() => {
+    Bun.plugin.clearAll();
+  });
+
+  // test.only("using { forceSide: 'server' } allows for imported components to be SSR'd", async () => {
+  it("Generates server-side code", async () => {
+    Bun.plugin(SveltePlugin());
+
+    const foo = await import(fixturePath("foo.svelte"));
+    expect(foo).toBeTypeOf("object");
+    expect(foo).toHaveProperty("default");
+
+    const actual = render(foo.default);
+    expect(actual).toEqual(
+      expect.objectContaining({
+        head: expect.any(String),
+        body: expect.any(String),
+      }),
+    );
+    expect(actual.head).toMatchSnapshot("foo.svelte - head");
+    expect(actual.body).toMatchSnapshot("foo.svelte - body");
+  });
+});

packages/bun-plugin-svelte/tsconfig.json

@@ -0,0 +1,34 @@
+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "emitDeclarationOnly": true,
+
+    // Best practices
+    "strict": true,
+    "strictNullChecks": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "stripInternal": true,
+
+    // thank you Titian
+    "isolatedDeclarations": true,
+    "declaration": true,
+    "declarationMap": true,
+
+    // Some stricter flags (disabled by default)
+    "noImplicitAny": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}

packages/bun-types/README.md

@@ -20,7 +20,7 @@ That's it! VS Code and TypeScript automatically load `@types/*` packages into yo
 
 # Contributing
 
-The `@types/bun` package is a shim that loads `bun-types`. The `bun-types` package lives in the Bun repo under `packages/bun-types`. It is generated via [./scripts/bundle.ts](./scripts/bundle.ts).
+The `@types/bun` package is a shim that loads `bun-types`. The `bun-types` package lives in the Bun repo under `packages/bun-types`.
 
 To add a new file, add it under `packages/bun-types`. Then add a [triple-slash directive](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html) pointing to it inside [./index.d.ts](./index.d.ts).
 
@@ -28,8 +28,6 @@ To add a new file, add it under `packages/bun-types`. Then add a [triple-slash d
 + /// <reference path="./newfile.d.ts" />
 ```
 
-[`./bundle.ts`](./bundle.ts) merges the types in this folder into a single file. To run it:
-
 ```bash
 bun build
 ```

packages/bun-types/authoring.md

@@ -0,0 +1,114 @@
+# Authoring @types/bun
+
+These declarations define the `'bun'` module, the `Bun` global variable, and lots of other global declarations like extending the `fetch` interface.
+
+## The `'bun'` Module
+
+The `Bun` global variable and the `'bun'` module types are defined with one syntax. It supports declaring both types/interfaces and runtime values:
+
+```typescript
+declare module "bun" {
+  // Your types go here
+  interface MyInterface {
+    // ...
+  }
+
+  type MyType = string | number;
+
+  function myFunction(): void;
+}
+```
+
+You can write as many `declare module "bun"` declarations as you need. Symbols will be accessible from other files inside of the declaration, and they will all be merged when the types are evaluated.
+
+You can consume these declarations in two ways:
+
+1. Importing it from `'bun'`:
+
+```typescript
+import { type MyInterface, type MyType, myFunction } from "bun";
+
+const myInterface: MyInterface = {};
+const myType: MyType = "cool";
+myFunction();
+```
+
+2. Using the global `Bun` object:
+
+```typescript
+const myInterface: Bun.MyInterface = {};
+const myType: Bun.MyType = "cool";
+Bun.myFunction();
+```
+
+Consuming them inside the ambient declarations is also easy:
+
+```ts
+// These are equivalent
+type A = import("bun").MyType;
+type A = Bun.MyType;
+```
+
+## File Structure
+
+Types are organized across multiple `.d.ts` files in the `packages/bun-types` directory:
+
+- `index.d.ts` - The main entry point that references all other type files
+- `bun.d.ts` - Core Bun APIs and types
+- `globals.d.ts` - Global type declarations
+- `test.d.ts` - Testing-related types
+- `sqlite.d.ts` - SQLite-related types
+- ...etc. You can make more files
+
+Note: The order of references in `index.d.ts` is important - `bun.ns.d.ts` must be referenced last to ensure the `Bun` global gets defined properly.
+
+### Best Practices
+
+1. **Type Safety**
+
+   - Please use strict types instead of `any` where possible
+   - Leverage TypeScript's type system features (generics, unions, etc.)
+   - Document complex types with JSDoc comments
+
+2. **Compatibility**
+
+   - Use `Bun.__internal.UseLibDomIfAvailable<LibDomName extends string, OurType>` for types that might conflict with lib.dom.d.ts (see [`./fetch.d.ts`](./fetch.d.ts) for a real example)
+   - `@types/node` often expects variables to always be defined (this was the biggest cause of most of the conflicts in the past!), so we use the `UseLibDomIfAvailable` type to make sure we don't overwrite `lib.dom.d.ts` but still provide Bun types while simultaneously declaring the variable exists (for Node to work) in the cases that we can.
+
+3. **Documentation**
+   - Add JSDoc comments for public APIs
+   - Include examples in documentation when helpful
+   - Document default values and important behaviors
+
+### Internal Types
+
+For internal types that shouldn't be exposed to users, use the `__internal` namespace:
+
+```typescript
+declare module "bun" {
+  namespace __internal {
+    interface MyInternalType {
+      // ...
+    }
+  }
+}
+```
+
+The internal namespace is mostly used for declaring things that shouldn't be globally accessible on the `bun` namespace, but are still used in public apis. You can see a pretty good example of that in the [`./fetch.d.ts`](./fetch.d.ts) file.
+
+## Testing Types
+
+We test our type definitions using a special test file at `fixture/index.ts`. This file contains TypeScript code that exercises our type definitions, but is never actually executed - it's only used to verify that the types work correctly.
+
+The test file is type-checked in two different environments:
+
+1. With `lib.dom.d.ts` included - This simulates usage in a browser environment where DOM types are available
+2. Without `lib.dom.d.ts` - This simulates usage in a server-like environment without DOM types
+
+Your type definitions must work properly in both environments. This ensures that Bun's types are compatible regardless of whether DOM types are present or not.
+
+For example, if you're adding types for a new API, you should just add code to `fixture/index.ts` that uses your new API. Doesn't need to work at runtime (e.g. you can fake api keys for example), it's just checking that the types are correct.
+
+## Questions
+
+Feel free to open an issue or speak to any of the more TypeScript-focused team members if you need help authoring types or fixing type tests.

packages/bun-types/bun.ns.d.ts

@@ -0,0 +1,7 @@
+import * as BunModule from "bun";
+
+declare global {
+  export import Bun = BunModule;
+}
+
+export {};

packages/bun-types/deprecated.d.ts

@@ -1,4 +1,19 @@
 declare module "bun" {
+  interface BunMessageEvent<T> {
+    /**
+     * @deprecated
+     */
+    initMessageEvent(
+      type: string,
+      bubbles?: boolean,
+      cancelable?: boolean,
+      data?: any,
+      origin?: string,
+      lastEventId?: string,
+      source?: null,
+    ): void;
+  }
+
   /**
    * @deprecated Renamed to `ErrorLike`
    */
@@ -38,21 +53,6 @@ declare namespace NodeJS {
   }
 }
 
-declare namespace Bun {
-  interface MessageEvent {
-    /** @deprecated */
-    initMessageEvent(
-      type: string,
-      bubbles?: boolean,
-      cancelable?: boolean,
-      data?: any,
-      origin?: string,
-      lastEventId?: string,
-      source?: null,
-    ): void;
-  }
-}
-
 interface CustomEvent<T = any> {
   /** @deprecated */
   initCustomEvent(type: string, bubbles?: boolean, cancelable?: boolean, detail?: T): void;

packages/bun-types/devserver.d.ts

@@ -0,0 +1,189 @@
+declare module "bun" {
+  type HMREventNames =
+    | "beforeUpdate"
+    | "afterUpdate"
+    | "beforeFullReload"
+    | "beforePrune"
+    | "invalidate"
+    | "error"
+    | "ws:disconnect"
+    | "ws:connect";
+
+  /**
+   * The event names for the dev server
+   */
+  type HMREvent = `bun:${HMREventNames}` | (string & {});
+}
+
+interface ImportMeta {
+  /**
+   * Hot module replacement APIs. This value is `undefined` in production and
+   * can be used in an `if` statement to check if HMR APIs are available
+   *
+   * ```ts
+   * if (import.meta.hot) {
+   *   // HMR APIs are available
+   * }
+   * ```
+   *
+   * However, this check is usually not needed as Bun will dead-code-eliminate
+   * calls to all of the HMR APIs in production builds.
+   *
+   * https://bun.sh/docs/bundler/hmr
+   */
+  hot: {
+    /**
+     * `import.meta.hot.data` maintains state between module instances during
+     * hot replacement, enabling data transfer from previous to new versions.
+     * When `import.meta.hot.data` is written to, Bun will mark this module as
+     * capable of self-accepting (equivalent of calling `accept()`).
+     *
+     * @example
+     * ```ts
+     * const root = import.meta.hot.data.root ??= createRoot(elem);
+     * root.render(<App />); // re-use an existing root
+     * ```
+     *
+     * In production, `data` is inlined to be `{}`. This is handy because Bun
+     * knows it can minify `{}.prop ??= value` into `value` in production.
+     *
+     *
+     */
+    data: any;
+
+    /**
+     * Indicate that this module can be replaced simply by re-evaluating the
+     * file. After a hot update, importers of this module will be
+     * automatically patched.
+     *
+     * When `import.meta.hot.accept` is not used, the page will reload when
+     * the file updates, and a console message shows which files were checked.
+     *
+     * @example
+     * ```ts
+     * import { getCount } from "./foo";
+     *
+     * console.log("count is ", getCount());
+     *
+     * import.meta.hot.accept();
+     * ```
+     */
+    accept(): void;
+
+    /**
+     * Indicate that this module can be replaced by evaluating the new module,
+     * and then calling the callback with the new module. In this mode, the
+     * importers do not get patched. This is to match Vite, which is unable
+     * to patch their import statements. Prefer using `import.meta.hot.accept()`
+     * without an argument as it usually makes your code easier to understand.
+     *
+     * When `import.meta.hot.accept` is not used, the page will reload when
+     * the file updates, and a console message shows which files were checked.
+     *
+     * @example
+     * ```ts
+     * export const count = 0;
+     *
+     * import.meta.hot.accept((newModule) => {
+     *   if (newModule) {
+     *     // newModule is undefined when SyntaxError happened
+     *     console.log('updated: count is now ', newModule.count)
+     *   }
+     * });
+     * ```
+     *
+     * In production, calls to this are dead-code-eliminated.
+     */
+    accept(cb: (newModule: any | undefined) => void): void;
+
+    /**
+     * Indicate that a dependency's module can be accepted. When the dependency
+     * is updated, the callback will be called with the new module.
+     *
+     * When `import.meta.hot.accept` is not used, the page will reload when
+     * the file updates, and a console message shows which files were checked.
+     *
+     * @example
+     * ```ts
+     * import.meta.hot.accept('./foo', (newModule) => {
+     *   if (newModule) {
+     *     // newModule is undefined when SyntaxError happened
+     *     console.log('updated: count is now ', newModule.count)
+     *   }
+     * });
+     * ```
+     */
+    accept(specifier: string, callback: (newModule: any) => void): void;
+
+    /**
+     * Indicate that a dependency's module can be accepted. This variant
+     * accepts an array of dependencies, where the callback will receive
+     * the one updated module, and `undefined` for the rest.
+     *
+     * When `import.meta.hot.accept` is not used, the page will reload when
+     * the file updates, and a console message shows which files were checked.
+     */
+    accept(specifiers: string[], callback: (newModules: (any | undefined)[]) => void): void;
+
+    /**
+     * Attach an on-dispose callback. This is called:
+     * - Just before the module is replaced with another copy (before the next is loaded)
+     * - After the module is detached (removing all imports to this module)
+     *
+     * This callback is not called on route navigation or when the browser tab closes.
+     *
+     * Returning a promise will delay module replacement until the module is
+     * disposed. All dispose callbacks are called in parallel.
+     */
+    dispose(cb: (data: any) => void | Promise<void>): void;
+
+    /**
+     * No-op
+     * @deprecated
+     */
+    decline(): void;
+
+    // NOTE TO CONTRIBUTORS ////////////////////////////////////////
+    //     Callback is currently never called for `.prune()`      //
+    //     so the types are commented out until we support it.    //
+    ////////////////////////////////////////////////////////////////
+    // /**
+    //  * Attach a callback that is called when the module is removed from the module graph.
+    //  *
+    //  * This can be used to clean up resources that were created when the module was loaded.
+    //  * Unlike `import.meta.hot.dispose()`, this pairs much better with `accept` and `data` to manage stateful resources.
+    //  *
+    //  * @example
+    //  * ```ts
+    //  * export const ws = (import.meta.hot.data.ws ??= new WebSocket(location.origin));
+    //  *
+    //  * import.meta.hot.prune(() => {
+    //  *   ws.close();
+    //  * });
+    //  * ```
+    //  */
+    // prune(callback: () => void): void;
+
+    /**
+     * Listen for an event from the dev server
+     *
+     * For compatibility with Vite, event names are also available via vite:* prefix instead of bun:*.
+     *
+     * https://bun.sh/docs/bundler/hmr#import-meta-hot-on-and-off
+     * @param event The event to listen to
+     * @param callback The callback to call when the event is emitted
+     */
+    on(event: Bun.HMREvent, callback: () => void): void;
+
+    /**
+     * Stop listening for an event from the dev server
+     *
+     * For compatibility with Vite, event names are also available via vite:* prefix instead of bun:*.
+     *
+     * https://bun.sh/docs/bundler/hmr#import-meta-hot-on-and-off
+     * @param event The event to stop listening to
+     * @param callback The callback to stop listening to
+     */
+    off(event: Bun.HMREvent, callback: () => void): void;
+  };
+}