Merge branch 'main' into jarred/micro-http

Co-authored-by: Ben Grant <ben@bun.sh>
Co-authored-by: Dylan Conway <dylan.conway567@gmail.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

.cursor/rules/javascriptcore-class.mdc

@@ -1,13 +1,14 @@
 ---
 description: JavaScript class implemented in C++
 globs: *.cpp
+alwaysApply: false
 ---
 
 # Implementing JavaScript classes in C++
 
 If there is a publicly accessible Constructor and Prototype, then there are 3 classes:
 
-- IF there are C++ class members we need a destructor, so `class Foo : public JSC::DestructibleObject`, if no C++ class fields (only JS properties) then we don't need a class at all usually. We can instead use JSC::constructEmptyObject(vm, structure) and `putDirectOffset` like in [NodeFSBinding.cpp](mdc:src/bun.js/bindings/NodeFSBinding.cpp).
+- IF there are C++ class members we need a destructor, so `class Foo : public JSC::DestructibleObject`, if no C++ class fields (only JS properties) then we don't need a class at all usually. We can instead use JSC::constructEmptyObject(vm, structure) and `putDirectOffset` like in [NodeFSStatBinding.cpp](mdc:src/bun.js/bindings/NodeFSStatBinding.cpp).
 - class FooPrototype : public JSC::JSNonFinalObject
 - class FooConstructor : public JSC::InternalFunction
 
@@ -18,6 +19,7 @@ If there are C++ fields on the Foo class, the Foo class will need an iso subspac
 Usually you'll need to #include "root.h" at the top of C++ files or you'll get lint errors.
 
 Generally, defining the subspace looks like this:
+
 ```c++
 
 class Foo : public JSC::DestructibleObject {
@@ -45,6 +47,7 @@ It's better to put it in the .cpp file instead of the .h file, when possible.
 ## Defining properties
 
 Define properties on the prototype. Use a const HashTableValues like this:
+
 ```C++
 static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckEmail);
 static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckHost);
@@ -158,6 +161,7 @@ void JSX509CertificatePrototype::finishCreation(VM& vm)
 ```
 
 ### Getter definition:
+
 ```C++
 
 JSC_DEFINE_CUSTOM_GETTER(jsX509CertificateGetter_ca, (JSGlobalObject * globalObject, EncodedJSValue thisValue, PropertyName))
@@ -212,7 +216,6 @@ JSC_DEFINE_HOST_FUNCTION(jsX509CertificateProtoFuncToJSON, (JSGlobalObject * glo
 }
 ```
 
-
 ### Constructor definition
 
 ```C++
@@ -259,7 +262,6 @@ private:
 };
 ```
 
-
 ### Structure caching
 
 If there's a class, prototype, and constructor:
@@ -279,6 +281,7 @@ void GlobalObject::finishCreation(VM& vm) {
 ```
 
 Then, implement the function that creates the structure:
+
 ```c++
 void setupX509CertificateClassStructure(LazyClassStructure::Initializer& init)
 {
@@ -301,11 +304,12 @@ If there's only a class, use `JSC::LazyProperty<JSGlobalObject, Structure>` inst
 1. Add the `JSC::LazyProperty<JSGlobalObject, Structure>` to @ZigGlobalObject.h
 2. Initialize the class structure in @ZigGlobalObject.cpp in `void GlobalObject::finishCreation(VM& vm)`
 3. Visit the lazy property in visitChildren in @ZigGlobalObject.cpp in `void GlobalObject::visitChildrenImpl`
-void GlobalObject::finishCreation(VM& vm) {
-// ...
+   void GlobalObject::finishCreation(VM& vm) {
+   // ...
    this.m_myLazyProperty.initLater([](const JSC::LazyProperty<JSC::JSGlobalObject, JSC::Structure>::Initializer& init) {
-        init.set(Bun::initMyStructure(init.vm, reinterpret_cast<Zig::GlobalObject*>(init.owner)));
-    });
+   init.set(Bun::initMyStructure(init.vm, reinterpret_cast<Zig::GlobalObject\*>(init.owner)));
+   });
+
 ```
 
 Then, implement the function that creates the structure:
@@ -316,7 +320,7 @@ Structure* setupX509CertificateStructure(JSC::VM &vm, Zig::GlobalObject* globalO
     auto* prototypeStructure = JSX509CertificatePrototype::createStructure(init.vm, init.global, init.global->objectPrototype());
     auto* prototype = JSX509CertificatePrototype::create(init.vm, init.global, prototypeStructure);
 
-    // If there is no prototype or it only has 
+    // If there is no prototype or it only has
 
     auto* structure = JSX509Certificate::createStructure(init.vm, init.global, prototype);
     init.setPrototype(prototype);
@@ -325,7 +329,6 @@ Structure* setupX509CertificateStructure(JSC::VM &vm, Zig::GlobalObject* globalO
 }
 ```
 
-
 Then, use the structure by calling `globalObject.m_myStructureName.get(globalObject)`
 
 ```C++
@@ -378,12 +381,14 @@ extern "C" JSC::EncodedJSValue Bun__JSBigIntStatsObjectConstructor(Zig::GlobalOb
 ```
 
 Zig:
+
 ```zig
 extern "c" fn Bun__JSBigIntStatsObjectConstructor(*JSC.JSGlobalObject) JSC.JSValue;
 pub const getBigIntStatsConstructor =  Bun__JSBigIntStatsObjectConstructor;
 ```
 
-To create an object (instance) of a JS class defined in C++ from Zig, follow the __toJS convention like this:
+To create an object (instance) of a JS class defined in C++ from Zig, follow the \_\_toJS convention like this:
+
 ```c++
 // X509* is whatever we need to create the object
 extern "C" EncodedJSValue Bun__X509__toJS(Zig::GlobalObject* globalObject, X509* cert)
@@ -395,12 +400,13 @@ extern "C" EncodedJSValue Bun__X509__toJS(Zig::GlobalObject* globalObject, X509*
 ```
 
 And from Zig:
+
 ```zig
 const X509 = opaque {
-    // ... class 
+    // ... class
 
     extern fn Bun__X509__toJS(*JSC.JSGlobalObject, *X509) JSC.JSValue;
-    
+
     pub fn toJS(this: *X509, globalObject: *JSC.JSGlobalObject) JSC.JSValue {
         return Bun__X509__toJS(globalObject, this);
     }

.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/run-lint.yml

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

.vscode/launch.json

@@ -1118,7 +1118,11 @@
       "request": "attach",
       "name": "rr",
       "trace": "Off",
-      "setupCommands": ["handle SIGPWR nostop noprint pass"],
+      "setupCommands": [
+        "handle SIGPWR nostop noprint pass",
+        "source ${workspaceFolder}/misctools/gdb/std_gdb_pretty_printers.py",
+        "source ${workspaceFolder}/misctools/gdb/zig_gdb_pretty_printers.py",
+      ],
     },
   ],
   "inputs": [

.vscode/settings.json

@@ -35,8 +35,6 @@
   // "zig.zls.enableBuildOnSave": true,
   // "zig.buildOnSave": true,
   "zig.buildFilePath": "${workspaceFolder}/build.zig",
-  "zig.path": "${workspaceFolder}/vendor/zig/zig.exe",
-  "zig.zls.path": "${workspaceFolder}/vendor/zig/zls.exe",
   "zig.formattingProvider": "zls",
   "zig.zls.enableInlayHints": false,
   "[zig]": {

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.
@@ -250,7 +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 @@
-1.2.5
+1.2.8

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/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/express/tsconfig.json

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

bench/postgres/tsconfig.json

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

build.zig

@@ -465,6 +465,7 @@ pub fn addBunObject(b: *Build, opts: *BunBuildOptions) *Compile {
         }
     }
     obj.bundle_compiler_rt = false;
+    obj.bundle_ubsan_rt = false;
     obj.root_module.omit_frame_pointer = false;
 
     // Link libc

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",

cmake/CompilerFlags.cmake

@@ -142,6 +142,14 @@ if(UNIX)
     -fno-unwind-tables
     -fno-asynchronous-unwind-tables
   )
+
+  # needed for libuv stubs because they use
+  # C23 feature which lets you define parameter without
+  # name
+  register_compiler_flags(
+    DESCRIPTION "Allow C23 extensions"
+    -Wno-c23-extensions
+  )
 endif()
 
 register_compiler_flags(

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()
 
@@ -625,7 +633,7 @@ function(register_repository)
     set(GIT_PATH ${VENDOR_PATH}/${GIT_NAME})
   endif()
 
-  set(GIT_EFFECTIVE_OUTPUTS)
+  set(GIT_EFFECTIVE_OUTPUTS ${GIT_PATH}/.ref)
   foreach(output ${GIT_OUTPUTS})
     list(APPEND GIT_EFFECTIVE_OUTPUTS ${GIT_PATH}/${output})
   endforeach()
@@ -743,11 +751,17 @@ function(register_cmake_command)
     list(APPEND MAKE_EFFECTIVE_ARGS --fresh)
   endif()
 
+  set(MAKE_SOURCES)
+  if(TARGET clone-${MAKE_TARGET})
+    list(APPEND MAKE_SOURCES ${MAKE_CWD}/.ref)
+  endif()
+
   register_command(
     COMMENT "Configuring ${MAKE_TARGET}"
     TARGET configure-${MAKE_TARGET}
     COMMAND ${CMAKE_COMMAND} ${MAKE_EFFECTIVE_ARGS}
     CWD ${MAKE_CWD}
+    SOURCES ${MAKE_SOURCES}
     OUTPUTS ${MAKE_BUILD_PATH}/CMakeCache.txt
   )
 
@@ -799,6 +813,7 @@ function(register_cmake_command)
     TARGETS configure-${MAKE_TARGET}
     COMMAND ${CMAKE_COMMAND} ${MAKE_BUILD_ARGS}
     CWD ${MAKE_CWD}
+    SOURCES ${MAKE_SOURCES}
     ARTIFACTS ${MAKE_ARTIFACTS}
   )
 

cmake/targets/BuildBoringSSL.cmake

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

cmake/targets/BuildBun.cmake

@@ -635,6 +635,8 @@ file(GLOB BUN_C_SOURCES ${CONFIGURE_DEPENDS}
   ${BUN_USOCKETS_SOURCE}/src/eventing/*.c
   ${BUN_USOCKETS_SOURCE}/src/internal/*.c
   ${BUN_USOCKETS_SOURCE}/src/crypto/*.c
+  ${CWD}/src/bun.js/bindings/uv-posix-polyfills.c
+  ${CWD}/src/bun.js/bindings/uv-posix-stubs.c
 )
 
 if(WIN32)
@@ -738,7 +740,7 @@ endif()
 # --- C/C++ Properties ---
 
 set_target_properties(${bun} PROPERTIES
-  CXX_STANDARD 20
+  CXX_STANDARD 23
   CXX_STANDARD_REQUIRED YES
   CXX_EXTENSIONS YES
   CXX_VISIBILITY_PRESET hidden
@@ -747,6 +749,18 @@ set_target_properties(${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 +787,10 @@ target_include_directories(${bun} PRIVATE
   ${NODEJS_HEADERS_PATH}/include
 )
 
+if(NOT WIN32) 
+  target_include_directories(${bun} PRIVATE ${CWD}/src/bun.js/bindings/libuv)
+endif()
+
 if(LINUX)
   include(CheckIncludeFiles)
   check_include_files("sys/queue.h" HAVE_SYS_QUEUE_H)
@@ -901,6 +919,10 @@ if(NOT WIN32)
       -Werror
     )
   endif()
+else()
+  target_compile_options(${bun} PUBLIC
+    -Wno-nullability-completeness
+  )
 endif()
 
 # --- Linker options ---
@@ -943,28 +965,17 @@ 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/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 2ffd4be9f9513c30333d9e23c175cab4760584e3)
+  set(WEBKIT_VERSION 12d2dfab74b34a50c8544c59f8a9454ce2e06e06)
 endif()
 
 string(SUBSTRING ${WEBKIT_VERSION} 0 16 WEBKIT_VERSION_PREFIX)

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/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/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

@@ -253,6 +253,19 @@ const proc = Bun.spawn({
 
 The `killSignal` option also controls which signal is sent when an AbortSignal is aborted.
 
+## Using maxBuffer
+
+For spawnSync, you can limit the maximum number of bytes of output before the process is killed:
+
+```ts
+// KIll 'yes' after it emits over 100 bytes of output
+const result = Bun.spawnSync({
+  cmd: ["yes"], // or ["bun", "exec", "yes"] on windows
+  maxBuffer: 100,
+});
+// process exits
+```
+
 ## 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.
@@ -423,6 +436,7 @@ namespace SpawnOptions {
     signal?: AbortSignal;
     timeout?: number;
     killSignal?: string | number;
+    maxBuffer?: number;
   }
 
   type Readable =

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/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

@@ -265,12 +265,25 @@ export default {
     page("test/time", "Dates and times", {
       description: "Control the date & time in your tests for more reliable and deterministic tests",
     }),
-    page("test/dom", "DOM testing", {
-      description: "Write headless tests for UI and React/Vue/Svelte/Lit components with happy-dom",
-    }),
+
     page("test/coverage", "Code coverage", {
       description: "Generate code coverage reports with `bun test --coverage`",
     }),
+    page("test/reporters", "Test reporters", {
+      description: "Add a junit reporter to your test runs",
+    }),
+    page("test/configuration", "Test configuration", {
+      description: "Configure the test runner with bunfig.toml",
+    }),
+    page("test/runtime-behavior", "Runtime behavior", {
+      description: "Learn how the test runner affects Bun's runtime behavior",
+    }),
+    page("test/discovery", "Finding tests", {
+      description: "Learn how the test runner discovers tests",
+    }),
+    page("test/dom", "DOM testing", {
+      description: "Write headless tests for UI and React/Vue/Svelte/Lit components with happy-dom",
+    }),
 
     divider("Package runner"),
     page("cli/bunx", "`bunx`", {
@@ -355,24 +368,24 @@ 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`"),
@@ -398,6 +411,9 @@ 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)
 
@@ -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/test/configuration.md

@@ -0,0 +1,87 @@
+Configure `bun test` via `bunfig.toml` file and command-line options. This page documents the available configuration options for `bun test`.
+
+## bunfig.toml options
+
+You can configure `bun test` behavior by adding a `[test]` section to your `bunfig.toml` file:
+
+```toml
+[test]
+# Options go here
+```
+
+### Test discovery
+
+#### root
+
+The `root` option specifies a root directory for test discovery, overriding the default behavior of scanning from the project root.
+
+```toml
+[test]
+root = "src"  # Only scan for tests in the src directory
+```
+
+### Reporters
+
+#### reporter.junit
+
+Configure the JUnit reporter output file path directly in the config file:
+
+```toml
+[test.reporter]
+junit = "path/to/junit.xml"  # Output path for JUnit XML report
+```
+
+This complements the `--reporter=junit` and `--reporter-outfile` CLI flags.
+
+### Memory usage
+
+#### smol
+
+Enable the `--smol` memory-saving mode specifically for the test runner:
+
+```toml
+[test]
+smol = true  # Reduce memory usage during test runs
+```
+
+This is equivalent to using the `--smol` flag on the command line.
+
+### Coverage options
+
+In addition to the options documented in the [coverage documentation](./coverage.md), the following options are available:
+
+#### coverageSkipTestFiles
+
+Exclude files matching test patterns (e.g., \*.test.ts) from the coverage report:
+
+```toml
+[test]
+coverageSkipTestFiles = true  # Exclude test files from coverage reports
+```
+
+#### coverageThreshold (Object form)
+
+The coverage threshold can be specified either as a number (as shown in the coverage documentation) or as an object with specific thresholds:
+
+```toml
+[test]
+# Set specific thresholds for different coverage metrics
+coverageThreshold = { lines = 0.9, functions = 0.8, statements = 0.85 }
+```
+
+Setting any of these enables `fail_on_low_coverage`, causing the test run to fail if coverage is below the threshold.
+
+#### coverageIgnoreSourcemaps
+
+Internally, Bun transpiles every file. That means code coverage must also go through sourcemaps before they can be reported. We expose this as a flag to allow you to opt out of this behavior, but it will be confusing because during the transpilation process, Bun may move code around and change variable names. This option is mostly useful for debugging coverage issues.
+
+```toml
+[test]
+coverageIgnoreSourcemaps = true  # Don't use sourcemaps for coverage analysis
+```
+
+When using this option, you probably want to stick a `// @bun` comment at the top of the source file to opt out of the transpilation process.
+
+### Install settings inheritance
+
+The `bun test` command inherits relevant network and installation configuration (registry, cafile, prefer, exact, etc.) from the `[install]` section of bunfig.toml. This is important if tests need to interact with private registries or require specific install behaviors triggered during the test run.

docs/test/coverage.md

@@ -52,9 +52,22 @@ It is possible to specify a coverage threshold in `bunfig.toml`. If your test su
 coverageThreshold = 0.9
 
 # to set different thresholds for lines and functions
-coverageThreshold = { lines = 0.9, functions = 0.9 }
+coverageThreshold = { lines = 0.9, functions = 0.9, statements = 0.9 }
 ```
 
+Setting any of these thresholds enables `fail_on_low_coverage`, causing the test run to fail if coverage is below the threshold.
+
+### Exclude test files from coverage
+
+By default, test files themselves are included in coverage reports. You can exclude them with:
+
+```toml
+[test]
+coverageSkipTestFiles = true   # default false
+```
+
+This will exclude files matching test patterns (e.g., _.test.ts, _\_spec.js) from the coverage report.
+
 ### Sourcemaps
 
 Internally, Bun transpiles all files by default, so Bun automatically generates an internal [source map](https://web.dev/source-maps/) that maps lines of your original source code onto Bun's internal representation. If for any reason you want to disable this, set `test.coverageIgnoreSourcemaps` to `true`; this will rarely be desirable outside of advanced use cases.
@@ -64,6 +77,14 @@ Internally, Bun transpiles all files by default, so Bun automatically generates
 coverageIgnoreSourcemaps = true   # default false
 ```
 
+### Coverage defaults
+
+By default, coverage reports:
+
+1. Exclude `node_modules` directories
+2. Exclude files loaded via non-JS/TS loaders (e.g., .css, .txt) unless a custom JS loader is specified
+3. Include test files themselves (can be disabled with `coverageSkipTestFiles = true` as shown above)
+
 ### Coverage reporters
 
 By default, coverage reports will be printed to the console.

docs/test/discovery.md

@@ -0,0 +1,85 @@
+bun test's file discovery mechanism determines which files to run as tests. Understanding how it works helps you structure your test files effectively.
+
+## Default Discovery Logic
+
+By default, `bun test` recursively searches the project directory for files that match specific patterns:
+
+- `*.test.{js|jsx|ts|tsx}` - Files ending with `.test.js`, `.test.jsx`, `.test.ts`, or `.test.tsx`
+- `*_test.{js|jsx|ts|tsx}` - Files ending with `_test.js`, `_test.jsx`, `_test.ts`, or `_test.tsx`
+- `*.spec.{js|jsx|ts|tsx}` - Files ending with `.spec.js`, `.spec.jsx`, `.spec.ts`, or `.spec.tsx`
+- `*_spec.{js|jsx|ts|tsx}` - Files ending with `_spec.js`, `_spec.jsx`, `_spec.ts`, or `_spec.tsx`
+
+## Exclusions
+
+By default, Bun test ignores:
+
+- `node_modules` directories
+- Hidden directories (those starting with a period `.`)
+- Files that don't have JavaScript-like extensions (based on available loaders)
+
+## Customizing Test Discovery
+
+### Position Arguments as Filters
+
+You can filter which test files run by passing additional positional arguments to `bun test`:
+
+```bash
+$ bun test <filter> <filter> ...
+```
+
+Any test file with a path that contains one of the filters will run. These filters are simple substring matches, not glob patterns.
+
+For example, to run all tests in a `utils` directory:
+
+```bash
+$ bun test utils
+```
+
+This would match files like `src/utils/string.test.ts` and `lib/utils/array_test.js`.
+
+### Specifying Exact File Paths
+
+To run a specific file in the test runner, make sure the path starts with `./` or `/` to distinguish it from a filter name:
+
+```bash
+$ bun test ./test/specific-file.test.ts
+```
+
+### Filter by Test Name
+
+To filter tests by name rather than file path, use the `-t`/`--test-name-pattern` flag with a regex pattern:
+
+```sh
+# run all tests with "addition" in the name
+$ bun test --test-name-pattern addition
+```
+
+The pattern is matched against a concatenated string of the test name prepended with the labels of all its parent describe blocks, separated by spaces. For example, a test defined as:
+
+```js
+describe("Math", () => {
+  describe("operations", () => {
+    test("should add correctly", () => {
+      // ...
+    });
+  });
+});
+```
+
+Would be matched against the string "Math operations should add correctly".
+
+### Changing the Root Directory
+
+By default, Bun looks for test files starting from the current working directory. You can change this with the `root` option in your `bunfig.toml`:
+
+```toml
+[test]
+root = "src"  # Only scan for tests in the src directory
+```
+
+## Execution Order
+
+Tests are run in the following order:
+
+1. Test files are executed sequentially (not in parallel)
+2. Within each file, tests run sequentially based on their definition order

docs/test/mocks.md

@@ -56,9 +56,9 @@ The following properties and methods are implemented on mock functions.
 - [x] [mockFn.mock.instances](https://jestjs.io/docs/mock-function-api#mockfnmockinstances)
 - [x] [mockFn.mock.contexts](https://jestjs.io/docs/mock-function-api#mockfnmockcontexts)
 - [x] [mockFn.mock.lastCall](https://jestjs.io/docs/mock-function-api#mockfnmocklastcall)
-- [x] [mockFn.mockClear()](https://jestjs.io/docs/mock-function-api#mockfnmockclear)
-- [x] [mockFn.mockReset()](https://jestjs.io/docs/mock-function-api#mockfnmockreset)
-- [x] [mockFn.mockRestore()](https://jestjs.io/docs/mock-function-api#mockfnmockrestore)
+- [x] [mockFn.mockClear()](https://jestjs.io/docs/mock-function-api#mockfnmockclear) - Clears call history
+- [x] [mockFn.mockReset()](https://jestjs.io/docs/mock-function-api#mockfnmockreset) - Clears call history and removes implementation
+- [x] [mockFn.mockRestore()](https://jestjs.io/docs/mock-function-api#mockfnmockrestore) - Restores original implementation
 - [x] [mockFn.mockImplementation(fn)](https://jestjs.io/docs/mock-function-api#mockfnmockimplementationfn)
 - [x] [mockFn.mockImplementationOnce(fn)](https://jestjs.io/docs/mock-function-api#mockfnmockimplementationoncefn)
 - [x] [mockFn.mockName(name)](https://jestjs.io/docs/mock-function-api#mockfnmocknamename)
@@ -197,7 +197,59 @@ After resolution, the mocked module is stored in the ES Module registry **and**
 
 The callback function is called lazily, only if the module is imported or required. This means that you can use `mock.module()` to mock modules that don't exist yet, and it means that you can use `mock.module()` to mock modules that are imported by other modules.
 
-## Restore all function mocks to their original values with `mock.restore()`
+### Module Mock Implementation Details
+
+Understanding how `mock.module()` works helps you use it more effectively:
+
+1. **Cache Interaction**: Module mocks interacts with both ESM and CommonJS module caches.
+
+2. **Lazy Evaluation**: The mock factory callback is only evaluated when the module is actually imported or required.
+
+3. **Path Resolution**: Bun automatically resolves the module specifier as though you were doing an import, supporting:
+   - Relative paths (`'./module'`)
+   - Absolute paths (`'/path/to/module'`)
+   - Package names (`'lodash'`)
+
+4. **Import Timing Effects**: 
+   - When mocking before first import: No side effects from the original module occur
+   - When mocking after import: The original module's side effects have already happened
+   - For this reason, using `--preload` is recommended for mocks that need to prevent side effects
+
+5. **Live Bindings**: Mocked ESM modules maintain live bindings, so changing the mock will update all existing imports
+
+## Global Mock Functions
+
+### Clear all mocks with `mock.clearAllMocks()`
+
+Reset all mock function state (calls, results, etc.) without restoring their original implementation:
+
+```ts
+import { expect, mock, test } from "bun:test";
+
+const random1 = mock(() => Math.random());
+const random2 = mock(() => Math.random());
+
+test("clearing all mocks", () => {
+  random1();
+  random2();
+  
+  expect(random1).toHaveBeenCalledTimes(1);
+  expect(random2).toHaveBeenCalledTimes(1);
+  
+  mock.clearAllMocks();
+  
+  expect(random1).toHaveBeenCalledTimes(0);
+  expect(random2).toHaveBeenCalledTimes(0);
+  
+  // Note: implementations are preserved
+  expect(typeof random1()).toBe("number");
+  expect(typeof random2()).toBe("number");
+});
+```
+
+This resets the `.mock.calls`, `.mock.instances`, `.mock.contexts`, and `.mock.results` properties of all mocks, but unlike `mock.restore()`, it does not restore the original implementation.
+
+### Restore all function mocks with `mock.restore()`
 
 Instead of manually restoring each mock individually with `mockFn.mockRestore()`, restore all mocks with one command by calling `mock.restore()`. Doing so does not reset the value of modules overridden with `mock.module()`.
 
@@ -234,3 +286,28 @@ test('foo, bar, baz', () => {
   expect(bazSpy).toBe('baz');
 });
 ```
+
+## Vitest Compatibility
+
+For added compatibility with tests written for [Vitest](https://vitest.dev/), Bun provides the `vi` global object as an alias for parts of the Jest mocking API:
+
+```ts
+import { test, expect } from "bun:test";
+
+// Using the 'vi' alias similar to Vitest
+test("vitest compatibility", () => {
+  const mockFn = vi.fn(() => 42);
+  
+  mockFn();
+  expect(mockFn).toHaveBeenCalled();
+  
+  // The following functions are available on the vi object:
+  // vi.fn
+  // vi.spyOn
+  // vi.mock
+  // vi.restoreAllMocks
+  // vi.clearAllMocks
+});
+```
+
+This makes it easier to port tests from Vitest to Bun without having to rewrite all your mocks.

docs/test/reporters.md

@@ -0,0 +1,108 @@
+bun test supports different output formats through reporters. This document covers both built-in reporters and how to implement your own custom reporters.
+
+## Built-in Reporters
+
+### Default Console Reporter
+
+By default, bun test outputs results to the console in a human-readable format:
+
+```sh
+test/package-json-lint.test.ts:
+✓ test/package.json [0.88ms]
+✓ test/js/third_party/grpc-js/package.json [0.18ms]
+✓ test/js/third_party/svelte/package.json [0.21ms]
+✓ test/js/third_party/express/package.json [1.05ms]
+
+ 4 pass
+ 0 fail
+ 4 expect() calls
+Ran 4 tests in 1.44ms
+```
+
+When a terminal doesn't support colors, the output avoids non-ascii characters:
+
+```sh
+test/package-json-lint.test.ts:
+(pass) test/package.json [0.48ms]
+(pass) test/js/third_party/grpc-js/package.json [0.10ms]
+(pass) test/js/third_party/svelte/package.json [0.04ms]
+(pass) test/js/third_party/express/package.json [0.04ms]
+
+ 4 pass
+ 0 fail
+ 4 expect() calls
+Ran 4 tests across 1 files. [0.66ms]
+```
+
+### JUnit XML Reporter
+
+For CI/CD environments, Bun supports generating JUnit XML reports. JUnit XML is a widely-adopted format for test results that can be parsed by many CI/CD systems, including GitLab, Jenkins, and others.
+
+#### Using the JUnit Reporter
+
+To generate a JUnit XML report, use the `--reporter=junit` flag along with `--reporter-outfile` to specify the output file:
+
+```sh
+$ bun test --reporter=junit --reporter-outfile=./junit.xml
+```
+
+This continues to output to the console as usual while also writing the JUnit XML report to the specified path at the end of the test run.
+
+#### Configuring via bunfig.toml
+
+You can also configure the JUnit reporter in your `bunfig.toml` file:
+
+```toml
+[test.reporter]
+junit = "path/to/junit.xml"  # Output path for JUnit XML report
+```
+
+#### Environment Variables in JUnit Reports
+
+The JUnit reporter automatically includes environment information as `<properties>` in the XML output. This can be helpful for tracking test runs in CI environments.
+
+Specifically, it includes the following environment variables when available:
+
+| Environment Variable                                                    | Property Name | Description            |
+| ----------------------------------------------------------------------- | ------------- | ---------------------- |
+| `GITHUB_RUN_ID`, `GITHUB_SERVER_URL`, `GITHUB_REPOSITORY`, `CI_JOB_URL` | `ci`          | CI build information   |
+| `GITHUB_SHA`, `CI_COMMIT_SHA`, `GIT_SHA`                                | `commit`      | Git commit identifiers |
+| System hostname                                                         | `hostname`    | Machine hostname       |
+
+This makes it easier to track which environment and commit a particular test run was for.
+
+#### Current Limitations
+
+The JUnit reporter currently has a few limitations that will be addressed in future updates:
+
+- `stdout` and `stderr` output from individual tests are not included in the report
+- Precise timestamp fields per test case are not included
+
+### GitHub Actions reporter
+
+Bun test automatically detects when it's running inside GitHub Actions and emits GitHub Actions annotations to the console directly. No special configuration is needed beyond installing Bun and running `bun test`.
+
+For a GitHub Actions workflow configuration example, see the [CI/CD integration](../cli/test.md#cicd-integration) section of the CLI documentation.
+
+## Custom Reporters
+
+Bun allows developers to implement custom test reporters by extending the WebKit Inspector Protocol with additional testing-specific domains.
+
+### Inspector Protocol for Testing
+
+To support test reporting, Bun extends the standard WebKit Inspector Protocol with two custom domains:
+
+1. **TestReporter**: Reports test discovery, execution start, and completion events
+2. **LifecycleReporter**: Reports errors and exceptions during test execution
+
+These extensions allow you to build custom reporting tools that can receive detailed information about test execution in real-time.
+
+### Key Events
+
+Custom reporters can listen for these key events:
+
+- `TestReporter.found`: Emitted when a test is discovered
+- `TestReporter.start`: Emitted when a test starts running
+- `TestReporter.end`: Emitted when a test completes
+- `Console.messageAdded`: Emitted when console output occurs during a test
+- `LifecycleReporter.error`: Emitted when an error or exception occurs

docs/test/runtime-behavior.md

@@ -0,0 +1,93 @@
+`bun test` is deeply integrated with Bun's runtime. This is part of what makes `bun test` fast and simple to use.
+
+#### `$NODE_ENV` environment variable
+
+`bun test` automatically sets `$NODE_ENV` to `"test"` unless it's already set in the environment or via .env files. This is standard behavior for most test runners and helps ensure consistent test behavior.
+
+```ts
+import { test, expect } from "bun:test";
+
+test("NODE_ENV is set to test", () => {
+  expect(process.env.NODE_ENV).toBe("test");
+});
+```
+
+#### `$TZ` environment variable
+
+By default, all `bun test` runs use UTC (`Etc/UTC`) as the time zone unless overridden by the `TZ` environment variable. This ensures consistent date and time behavior across different development environments.
+
+#### Test Timeouts
+
+Each test has a default timeout of 5000ms (5 seconds) if not explicitly overridden. Tests that exceed this timeout will fail. This can be changed globally with the `--timeout` flag or per-test as the third parameter to the test function.
+
+## Error Handling
+
+### Unhandled Errors
+
+`bun test` tracks unhandled promise rejections and errors that occur between tests. If such errors occur, the final exit code will be non-zero (specifically, the count of such errors), even if all tests pass.
+
+This helps catch errors in asynchronous code that might otherwise go unnoticed:
+
+```ts
+import { test } from "bun:test";
+
+test("test 1", () => {
+  // This test passes
+});
+
+// This error happens outside any test
+setTimeout(() => {
+  throw new Error("Unhandled error");
+}, 0);
+
+test("test 2", () => {
+  // This test also passes
+});
+
+// The test run will still fail with a non-zero exit code
+// because of the unhandled error
+```
+
+Internally, this occurs with a higher precedence than `process.on("unhandledRejection")` or `process.on("uncaughtException")`, which makes it simpler to integrate with existing code.
+
+## Using General CLI Flags with Tests
+
+Several Bun CLI flags can be used with `bun test` to modify its behavior:
+
+### Memory Usage
+
+- `--smol`: Reduces memory usage for the test runner VM
+
+### Debugging
+
+- `--inspect`, `--inspect-brk`: Attaches the debugger to the test runner process
+
+### Module Loading
+
+- `--preload`: Runs scripts before test files (useful for global setup/mocks)
+- `--define`: Sets compile-time constants
+- `--loader`: Configures custom loaders
+- `--tsconfig-override`: Uses a different tsconfig
+- `--conditions`: Sets package.json conditions for module resolution
+- `--env-file`: Loads environment variables for tests
+
+### Installation-related Flags
+
+- `--prefer-offline`, `--frozen-lockfile`, etc.: Affect any network requests or auto-installs during test execution
+
+## Watch and Hot Reloading
+
+When running `bun test` with the `--watch` flag, the test runner will watch for file changes and re-run affected tests.
+
+The `--hot` flag provides similar functionality but is more aggressive about trying to preserve state between runs. For most test scenarios, `--watch` is the recommended option.
+
+## Global Variables
+
+The following globals are automatically available in test files without importing (though they can be imported from `bun:test` if preferred):
+
+- `test`, `it`: Define tests
+- `describe`: Group tests
+- `expect`: Make assertions
+- `beforeAll`, `beforeEach`, `afterAll`, `afterEach`: Lifecycle hooks
+- `jest`: Jest global object
+- `vi`: Vitest compatibility alias for common jest methods

docs/test/snapshots.md

@@ -1,3 +1,7 @@
+Snapshot testing saves the output of a value and compares it against future test runs. This is particularly useful for UI components, complex objects, or any output that needs to remain consistent.
+
+## Basic snapshots
+
 Snapshot tests are written using the `.toMatchSnapshot()` matcher:
 
 ```ts
@@ -13,3 +17,52 @@ The first time this test is run, the argument to `expect` will be serialized and
 ```bash
 $ bun test --update-snapshots
 ```
+
+## Inline snapshots
+
+For smaller values, you can use inline snapshots with `.toMatchInlineSnapshot()`. These snapshots are stored directly in your test file:
+
+```ts
+import { test, expect } from "bun:test";
+
+test("inline snapshot", () => {
+  // First run: snapshot will be inserted automatically
+  expect({ hello: "world" }).toMatchInlineSnapshot();
+
+  // After first run, the test file will be updated to:
+  // expect({ hello: "world" }).toMatchInlineSnapshot(`
+  //   {
+  //     "hello": "world",
+  //   }
+  // `);
+});
+```
+
+When you run the test, Bun automatically updates the test file itself with the generated snapshot string. This makes the tests more portable and easier to understand, since the expected output is right next to the test.
+
+### Using inline snapshots
+
+1. Write your test with `.toMatchInlineSnapshot()`
+2. Run the test once
+3. Bun automatically updates your test file with the snapshot
+4. On subsequent runs, the value will be compared against the inline snapshot
+
+Inline snapshots are particularly useful for small, simple values where it's helpful to see the expected output right in the test file.
+
+## Error snapshots
+
+You can also snapshot error messages using `.toThrowErrorMatchingSnapshot()` and `.toThrowErrorMatchingInlineSnapshot()`:
+
+```ts
+import { test, expect } from "bun:test";
+
+test("error snapshot", () => {
+  expect(() => {
+    throw new Error("Something went wrong");
+  }).toThrowErrorMatchingSnapshot();
+
+  expect(() => {
+    throw new Error("Another error");
+  }).toThrowErrorMatchingInlineSnapshot();
+});
+```

docs/test/time.md

@@ -74,9 +74,29 @@ test("it was 2020, for a moment.", () => {
 });
 ```
 
+## Get mocked time with `jest.now()`
+
+When you're using mocked time (with `setSystemTime` or `useFakeTimers`), you can use `jest.now()` to get the current mocked timestamp:
+
+```ts
+import { test, expect, jest } from "bun:test";
+
+test("get the current mocked time", () => {
+  jest.useFakeTimers();
+  jest.setSystemTime(new Date("2020-01-01T00:00:00.000Z"));
+  
+  expect(Date.now()).toBe(1577836800000); // Jan 1, 2020 timestamp
+  expect(jest.now()).toBe(1577836800000); // Same value
+  
+  jest.useRealTimers();
+});
+```
+
+This is useful when you need to access the mocked time directly without creating a new Date object.
+
 ## Set the time zone
 
-To change the time zone, either pass the `$TZ` environment variable to `bun test`.
+By default, the time zone for all `bun test` runs is set to UTC (`Etc/UTC`) unless overridden. To change the time zone, either pass the `$TZ` environment variable to `bun test`.
 
 ```sh
 TZ=America/Los_Angeles bun test

docs/test/writing.md

@@ -78,9 +78,11 @@ test("wat", async () => {
 
 In `bun:test`, test timeouts throw an uncatchable exception to force the test to stop running and fail. We also kill any child processes that were spawned in the test to avoid leaving behind zombie processes lurking in the background.
 
+The default timeout for each test is 5000ms (5 seconds) if not overridden by this timeout option or `jest.setDefaultTimeout()`.
+
 ### 🧟 Zombie process killer
 
-When a test times out and processes spawned in the test via `Bun.spawn`, `Bun.spawnSync`, or `node:child_process` are not killed, they will be automatically killed and a message will be logged to the console.
+When a test times out and processes spawned in the test via `Bun.spawn`, `Bun.spawnSync`, or `node:child_process` are not killed, they will be automatically killed and a message will be logged to the console. This prevents zombie processes from lingering in the background after timed-out tests.
 
 ## `test.skip`
 
@@ -125,7 +127,7 @@ fix the test.
 
 ## `test.only`
 
-To run a particular test or suite of tests use `test.only()` or `describe.only()`. Once declared, running `bun test --only` will only execute tests/suites that have been marked with `.only()`. Running `bun test` without the `--only` option with `test.only()` declared will result in all tests in the given suite being executed _up to_ the test with `.only()`. `describe.only()` functions the same in both execution scenarios.
+To run a particular test or suite of tests use `test.only()` or `describe.only()`.
 
 ```ts
 import { test, describe } from "bun:test";
@@ -197,22 +199,121 @@ test.todoIf(macOS)("runs on posix", () => {
 });
 ```
 
-## `test.each`
+## `test.failing`
 
-To return a function for multiple cases in a table of tests, use `test.each`.
+Use `test.failing()` when you know a test is currently failing but you want to track it and be notified when it starts passing. This inverts the test result:
+
+- A failing test marked with `.failing()` will pass
+- A passing test marked with `.failing()` will fail (with a message indicating it's now passing and should be fixed)
+
+```ts
+// This will pass because the test is failing as expected
+test.failing("math is broken", () => {
+  expect(0.1 + 0.2).toBe(0.3); // fails due to floating point precision
+});
+
+// This will fail with a message that the test is now passing
+test.failing("fixed bug", () => {
+  expect(1 + 1).toBe(2); // passes, but we expected it to fail
+});
+```
+
+This is useful for tracking known bugs that you plan to fix later, or for implementing test-driven development.
+
+## Conditional Tests for Describe Blocks
+
+The conditional modifiers `.if()`, `.skipIf()`, and `.todoIf()` can also be applied to `describe` blocks, affecting all tests within the suite:
+
+```ts
+const isMacOS = process.platform === "darwin";
+
+// Only runs the entire suite on macOS
+describe.if(isMacOS)("macOS-specific features", () => {
+  test("feature A", () => {
+    // only runs on macOS
+  });
+
+  test("feature B", () => {
+    // only runs on macOS
+  });
+});
+
+// Skips the entire suite on Windows
+describe.skipIf(process.platform === "win32")("Unix features", () => {
+  test("feature C", () => {
+    // skipped on Windows
+  });
+});
+
+// Marks the entire suite as TODO on Linux
+describe.todoIf(process.platform === "linux")("Upcoming Linux support", () => {
+  test("feature D", () => {
+    // marked as TODO on Linux
+  });
+});
+```
+
+## `test.each` and `describe.each`
+
+To run the same test with multiple sets of data, use `test.each`. This creates a parametrized test that runs once for each test case provided.
 
 ```ts
 const cases = [
   [1, 2, 3],
-  [3, 4, 5],
+  [3, 4, 7],
 ];
 
 test.each(cases)("%p + %p should be %p", (a, b, expected) => {
-  // runs once for each test case provided
+  expect(a + b).toBe(expected);
 });
 ```
 
-There are a number of options available for formatting the case label depending on its type.
+You can also use `describe.each` to create a parametrized suite that runs once for each test case:
+
+```ts
+describe.each([
+  [1, 2, 3],
+  [3, 4, 7],
+])("add(%i, %i)", (a, b, expected) => {
+  test(`returns ${expected}`, () => {
+    expect(a + b).toBe(expected);
+  });
+
+  test(`sum is greater than each value`, () => {
+    expect(a + b).toBeGreaterThan(a);
+    expect(a + b).toBeGreaterThan(b);
+  });
+});
+```
+
+### Argument Passing
+
+How arguments are passed to your test function depends on the structure of your test cases:
+
+- If a table row is an array (like `[1, 2, 3]`), each element is passed as an individual argument
+- If a row is not an array (like an object), it's passed as a single argument
+
+```ts
+// Array items passed as individual arguments
+test.each([
+  [1, 2, 3],
+  [4, 5, 9],
+])("add(%i, %i) = %i", (a, b, expected) => {
+  expect(a + b).toBe(expected);
+});
+
+// Object items passed as a single argument
+test.each([
+  { a: 1, b: 2, expected: 3 },
+  { a: 4, b: 5, expected: 9 },
+])("add($a, $b) = $expected", data => {
+  expect(data.a + data.b).toBe(data.expected);
+});
+```
+
+### Format Specifiers
+
+There are a number of options available for formatting the test title:
 
 {% table %}
 
@@ -263,6 +364,68 @@ There are a number of options available for formatting the case label depending
 
 {% /table %}
 
+#### Examples
+
+```ts
+// Basic specifiers
+test.each([
+  ["hello", 123],
+  ["world", 456],
+])("string: %s, number: %i", (str, num) => {
+  // "string: hello, number: 123"
+  // "string: world, number: 456"
+});
+
+// %p for pretty-format output
+test.each([
+  [{ name: "Alice" }, { a: 1, b: 2 }],
+  [{ name: "Bob" }, { x: 5, y: 10 }],
+])("user %p with data %p", (user, data) => {
+  // "user { name: 'Alice' } with data { a: 1, b: 2 }"
+  // "user { name: 'Bob' } with data { x: 5, y: 10 }"
+});
+
+// %# for index
+test.each(["apple", "banana"])("fruit #%# is %s", fruit => {
+  // "fruit #0 is apple"
+  // "fruit #1 is banana"
+});
+```
+
+## Assertion Counting
+
+Bun supports verifying that a specific number of assertions were called during a test:
+
+### expect.hasAssertions()
+
+Use `expect.hasAssertions()` to verify that at least one assertion is called during a test:
+
+```ts
+test("async work calls assertions", async () => {
+  expect.hasAssertions(); // Will fail if no assertions are called
+
+  const data = await fetchData();
+  expect(data).toBeDefined();
+});
+```
+
+This is especially useful for async tests to ensure your assertions actually run.
+
+### expect.assertions(count)
+
+Use `expect.assertions(count)` to verify that a specific number of assertions are called during a test:
+
+```ts
+test("exactly two assertions", () => {
+  expect.assertions(2); // Will fail if not exactly 2 assertions are called
+
+  expect(1 + 1).toBe(2);
+  expect("hello").toContain("ell");
+});
+```
+
+This helps ensure all your assertions run, especially in complex async code with multiple code paths.
+
 ## Matchers
 
 Bun implements the following matchers. Full Jest compatibility is on the roadmap; track progress [here](https://github.com/oven-sh/bun/issues/1825).

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/gdb/std_gdb_pretty_printers.py

@@ -0,0 +1,142 @@
+# pretty printing for the standard library.
+# put "source /path/to/stage2_gdb_pretty_printers.py" in ~/.gdbinit to load it automatically.
+import re
+import gdb.printing
+
+# Handles both ArrayList and ArrayListUnmanaged.
+class ArrayListPrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        type = self.val.type.name[len('std.array_list.'):]
+        type = re.sub(r'^ArrayListAligned(Unmanaged)?\((.*),null\)$', r'ArrayList\1(\2)', type)
+        return '%s of length %s, capacity %s' % (type, self.val['items']['len'], self.val['capacity'])
+
+    def children(self):
+        for i in range(self.val['items']['len']):
+            item = self.val['items']['ptr'] + i
+            yield ('[%d]' % i, item.dereference())
+
+    def display_hint(self):
+        return 'array'
+
+class MultiArrayListPrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def child_type(self):
+        (helper_fn, _) = gdb.lookup_symbol('%s.dbHelper' % self.val.type.name)
+        return helper_fn.type.fields()[1].type.target()
+
+    def to_string(self):
+        type = self.val.type.name[len('std.multi_array_list.'):]
+        return '%s of length %s, capacity %s' % (type, self.val['len'], self.val['capacity'])
+
+    def slice(self):
+        fields = self.child_type().fields()
+        base = self.val['bytes']
+        cap = self.val['capacity']
+        len = self.val['len']
+
+        if len == 0:
+            return
+
+        fields = sorted(fields, key=lambda field: field.type.alignof, reverse=True)
+
+        for field in fields:
+            ptr = base.cast(field.type.pointer()).dereference().cast(field.type.array(len - 1))
+            base += field.type.sizeof * cap
+            yield (field.name, ptr)
+
+    def children(self):
+        for i, (name, ptr) in enumerate(self.slice()):
+            yield ('[%d]' % i, name)
+            yield ('[%d]' % i, ptr)
+
+    def display_hint(self):
+        return 'map'
+
+# Handles both HashMap and HashMapUnmanaged.
+class HashMapPrinter:
+    def __init__(self, val):
+        self.type = val.type
+        is_managed = re.search(r'^std\.hash_map\.HashMap\(', self.type.name)
+        self.val = val['unmanaged'] if is_managed else val
+
+    def header_ptr_type(self):
+        (helper_fn, _) = gdb.lookup_symbol('%s.dbHelper' % self.val.type.name)
+        return helper_fn.type.fields()[1].type
+
+    def header(self):
+        if self.val['metadata'] == 0:
+            return None
+        return (self.val['metadata'].cast(self.header_ptr_type()) - 1).dereference()
+
+    def to_string(self):
+        type = self.type.name[len('std.hash_map.'):]
+        type = re.sub(r'^HashMap(Unmanaged)?\((.*),std.hash_map.AutoContext\(.*$', r'AutoHashMap\1(\2)', type)
+        hdr = self.header()
+        if hdr is not None:
+            cap = hdr['capacity']
+        else:
+            cap = 0
+        return '%s of length %s, capacity %s' % (type, self.val['size'], cap)
+
+    def children(self):
+        hdr = self.header()
+        if hdr is None:
+            return
+        is_map = self.display_hint() == 'map'
+        for i in range(hdr['capacity']):
+            metadata = self.val['metadata'] + i
+            if metadata.dereference()['used'] == 1:
+                yield ('[%d]' % i, (hdr['keys'] + i).dereference())
+                if is_map:
+                    yield ('[%d]' % i, (hdr['values'] + i).dereference())
+
+    def display_hint(self):
+        for field in self.header_ptr_type().target().fields():
+            if field.name == 'values':
+                return 'map'
+        return 'array'
+
+# Handles both ArrayHashMap and ArrayHashMapUnmanaged.
+class ArrayHashMapPrinter:
+    def __init__(self, val):
+        self.type = val.type
+        is_managed = re.search(r'^std\.array_hash_map\.ArrayHashMap\(', self.type.name)
+        self.val = val['unmanaged'] if is_managed else val
+
+    def to_string(self):
+        type = self.type.name[len('std.array_hash_map.'):]
+        type = re.sub(r'^ArrayHashMap(Unmanaged)?\((.*),std.array_hash_map.AutoContext\(.*$', r'AutoArrayHashMap\1(\2)', type)
+        return '%s of length %s' % (type, self.val['entries']['len'])
+
+    def children(self):
+        entries = MultiArrayListPrinter(self.val['entries'])
+        len = self.val['entries']['len']
+        fields = {}
+        for name, ptr in entries.slice():
+            fields[str(name)] = ptr
+
+        for i in range(len):
+            if 'key' in fields:
+                yield ('[%d]' % i, fields['key'][i])
+            else:
+                yield ('[%d]' % i, '{}')
+            if 'value' in fields:
+                yield ('[%d]' % i, fields['value'][i])
+
+    def display_hint(self):
+        for name, ptr in MultiArrayListPrinter(self.val['entries']).slice():
+            if name == 'value':
+                return 'map'
+        return 'array'
+
+pp = gdb.printing.RegexpCollectionPrettyPrinter('Zig standard library')
+pp.add_printer('ArrayList', r'^std\.array_list\.ArrayListAligned(Unmanaged)?\(.*\)$', ArrayListPrinter)
+pp.add_printer('MultiArrayList', r'^std\.multi_array_list\.MultiArrayList\(.*\)$', MultiArrayListPrinter)
+pp.add_printer('HashMap', r'^std\.hash_map\.HashMap(Unmanaged)?\(.*\)$', HashMapPrinter)
+pp.add_printer('ArrayHashMap', r'^std\.array_hash_map\.ArrayHashMap(Unmanaged)?\(.*\)$', ArrayHashMapPrinter)
+gdb.printing.register_pretty_printer(gdb.current_objfile(), pp)

misctools/gdb/zig_gdb_pretty_printers.py

@@ -0,0 +1,63 @@
+# pretty printing for the language.
+# put "source /path/to/zig_gdb_pretty_printers.py" in ~/.gdbinit to load it automatically.
+import gdb.printing
+
+
+class ZigPrettyPrinter(gdb.printing.PrettyPrinter):
+    def __init__(self):
+        super().__init__('Zig')
+
+    def __call__(self, val):
+        tag = val.type.tag
+        if tag is None:
+            return None
+        if tag == '[]u8':
+            return StringPrinter(val)
+        if tag.startswith('[]'):
+            return SlicePrinter(val)
+        if tag.startswith('?'):
+            return OptionalPrinter(val)
+        return None
+
+
+class SlicePrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        return f"{self.val['len']} items at {self.val['ptr']}"
+
+    def children(self):
+        def it(val):
+            for i in range(int(val['len'])):
+                item = val['ptr'] + i
+                yield (f'[{i}]', item.dereference())
+        return it(self.val)
+
+    def display_hint(self):
+        return 'array'
+
+
+class StringPrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        return self.val['ptr'].string(length=int(self.val['len']))
+
+    def display_hint(self):
+        return 'string'
+
+
+class OptionalPrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        if self.val['some']:
+            return self.val['data']
+        else:
+            return 'null'
+
+
+gdb.printing.register_pretty_printer(gdb.current_objfile(), ZigPrettyPrinter())

oxlint.json

@@ -29,6 +29,9 @@
     "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/js/node/module/extensions-fixture", // these files are not meant to be linted
+    "test/cli/run/module-type-fixture",
     "test/bundler/transpiler/with-statement-works.js" // parser doesn't allow `with` statement
   ],
   "overrides": [

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "bun",
-  "version": "1.2.6",
+  "version": "1.2.9",
   "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/bun.lock

@@ -4,12 +4,12 @@
     "": {
       "name": "bun-plugin-svelte",
       "devDependencies": {
+        "@threlte/core": "8.0.1",
         "bun-types": "canary",
         "svelte": "^5.20.4",
       },
       "peerDependencies": {
         "svelte": "^5",
-        "typescript": "^5",
       },
     },
   },
@@ -26,6 +26,8 @@
 
     "@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=="],
@@ -54,9 +56,11 @@
 
     "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=="],
 
-    "typescript": ["typescript@5.7.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-84MVSjMEHP+FQRPy3pX9sTVV/INIex71s9TL2Gm5FG/WG1SqXeKyZ0k7/blY/4FdOzI12CBy1vGc4og/eus0fw=="],
+    "three": ["three@0.174.0", "", {}, "sha512-p+WG3W6Ov74alh3geCMkGK9NWuT62ee21cV3jEnun201zodVF4tCE5aZa2U122/mkLRmhJJUQmLLW1BH00uQJQ=="],
 
     "undici-types": ["undici-types@6.20.0", "", {}, "sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg=="],
 

packages/bun-plugin-svelte/package.json

@@ -1,6 +1,6 @@
 {
   "name": "bun-plugin-svelte",
-  "version": "0.0.5",
+  "version": "0.0.6",
   "description": "Official Svelte plugin for Bun",
   "repository": {
     "type": "git",

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

@@ -11,7 +11,11 @@ describe("SveltePlugin", () => {
     expect(() => SveltePlugin(undefined)).not.toThrow();
   });
 
-  it.each([null, 1, "hi", {}, "Client"])("throws if forceSide is not 'client' or 'server' (%p)", (forceSide: any) => {
+  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/options.spec.ts

@@ -2,7 +2,7 @@ import { describe, beforeAll, it, expect } from "bun:test";
 import type { BuildConfig } from "bun";
 import type { CompileOptions } from "svelte/compiler";
 
-import { getBaseCompileOptions, type SvelteOptions } from "./options";
+import { getBaseCompileOptions, validateOptions, type SvelteOptions } from "./options";
 
 describe("getBaseCompileOptions", () => {
   describe("when no options are provided", () => {
@@ -42,4 +42,13 @@ describe("getBaseCompileOptions", () => {
       );
     },
   );
-});
+}); // 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

@@ -2,7 +2,8 @@ import { strict as assert } from "node:assert";
 import { type BuildConfig } from "bun";
 import type { CompileOptions, ModuleCompileOptions } from "svelte/compiler";
 
-export interface SvelteOptions {
+type OverrideCompileOptions = Pick<CompileOptions, "customElement" | "runes" | "modernAst" | "namespace">;
+export interface SvelteOptions extends Pick<CompileOptions, "runes"> {
   /**
    * Force client-side or server-side generation.
    *
@@ -20,6 +21,11 @@ export interface SvelteOptions {
    * Defaults to `true` when run via Bun's dev server, `false` otherwise.
    */
   development?: boolean;
+
+  /**
+   * Options to forward to the Svelte compiler.
+   */
+  compilerOptions?: OverrideCompileOptions;
 }
 
 /**
@@ -27,15 +33,24 @@ export interface SvelteOptions {
  */
 export function validateOptions(options: unknown): asserts options is SvelteOptions {
   assert(options && typeof options === "object", new TypeError("bun-svelte-plugin: options must be an object"));
-  if ("forceSide" in options) {
-    switch (options.forceSide) {
+  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 ${options.forceSide}`,
-        );
+        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");
     }
   }
 }
@@ -44,7 +59,10 @@ export function validateOptions(options: unknown): asserts options is SvelteOpti
  * @internal
  */
 export function getBaseCompileOptions(pluginOptions: SvelteOptions, config: Partial<BuildConfig>): CompileOptions {
-  let { development = false } = pluginOptions;
+  let {
+    development = false,
+    compilerOptions: { customElement, runes, modernAst, namespace } = kEmptyObject as OverrideCompileOptions,
+  } = pluginOptions;
   const { minify = false } = config;
 
   const shouldMinify = Boolean(minify);
@@ -68,6 +86,10 @@ export function getBaseCompileOptions(pluginOptions: SvelteOptions, config: Part
     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
@@ -109,3 +131,4 @@ function generateSide(pluginOptions: SvelteOptions, config: Partial<BuildConfig>
 }
 
 export const hash = (content: string): string => Bun.hash(content, 5381).toString(36);
+const kEmptyObject = Object.create(null);

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

@@ -24,13 +24,32 @@ afterAll(() => {
   }
 });
 
-it("hello world component", async () => {
-  const res = await Bun.build({
-    entrypoints: [fixturePath("foo.svelte")],
-    outdir,
-    plugins: [SveltePlugin()],
+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();
+    });
   });
-  expect(res.success).toBeTrue();
 });
 
 describe("when importing `.svelte.ts` files with ESM", () => {

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

@@ -1,192 +1,189 @@
-export {};
+declare module "bun" {
+  type HMREventNames =
+    | "beforeUpdate"
+    | "afterUpdate"
+    | "beforeFullReload"
+    | "beforePrune"
+    | "invalidate"
+    | "error"
+    | "ws:disconnect"
+    | "ws:connect";
 
-declare global {
-  namespace Bun {
-    type HMREventNames =
-      | "bun:ready"
-      | "bun:beforeUpdate"
-      | "bun:afterUpdate"
-      | "bun:beforeFullReload"
-      | "bun:beforePrune"
-      | "bun:invalidate"
-      | "bun:error"
-      | "bun:ws:disconnect"
-      | "bun: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: {
     /**
-     * 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
+     * `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
-     * if (import.meta.hot) {
-     *   // HMR APIs are available
-     * }
+     * const root = import.meta.hot.data.root ??= createRoot(elem);
+     * root.render(<App />); // re-use an existing root
      * ```
      *
-     * However, this check is usually not needed as Bun will dead-code-eliminate
-     * calls to all of the HMR APIs in production builds.
+     * In production, `data` is inlined to be `{}`. This is handy because Bun
+     * knows it can minify `{}.prop ??= value` into `value` in production.
+     *
      *
-     * 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;
+    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 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 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. 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;
+    /**
+     * 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;
+    /**
+     * 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;
+    /**
+     * 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;
+    // 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;
+    /**
+     * 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;
-    };
-  }
+    /**
+     * 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;
+  };
 }

packages/bun-types/extensions.d.ts

@@ -19,13 +19,13 @@ declare module "*/bun.lock" {
 }
 
 declare module "*.html" {
-  // In Bun v1.2, we might change this to Bun.HTMLBundle
+  // In Bun v1.2, this might change to Bun.HTMLBundle
   var contents: any;
   export = contents;
 }
 
 declare module "*.svg" {
   // Bun 1.2.3 added support for frontend dev server
-  var contents: `${string}.svg`;
-  export = contents;
+  var content: `${string}.svg`;
+  export = content;
 }

packages/bun-types/fetch.d.ts

@@ -1,161 +1,72 @@
-interface Headers {
-  /**
-   * Convert {@link Headers} to a plain JavaScript object.
-   *
-   * About 10x faster than `Object.fromEntries(headers.entries())`
-   *
-   * Called when you run `JSON.stringify(headers)`
-   *
-   * Does not preserve insertion order. Well-known header names are lowercased. Other header names are left as-is.
-   */
-  toJSON(): Record<string, string>;
-  /**
-   * Get the total number of headers
-   */
-  readonly count: number;
-  /**
-   * Get all headers matching the name
-   *
-   * Only supports `"Set-Cookie"`. All other headers are empty arrays.
-   *
-   * @param name - The header name to get
-   *
-   * @returns An array of header values
-   *
-   * @example
-   * ```ts
-   * const headers = new Headers();
-   * headers.append("Set-Cookie", "foo=bar");
-   * headers.append("Set-Cookie", "baz=qux");
-   * headers.getAll("Set-Cookie"); // ["foo=bar", "baz=qux"]
-   * ```
-   */
-  getAll(name: "set-cookie" | "Set-Cookie"): string[];
-}
+/*
 
-var Headers: {
-  prototype: Headers;
-  new (init?: Bun.HeadersInit): Headers;
-};
+  This file does not declare any global types.
 
-interface Request {
-  headers: Headers;
-}
+  That should only happen in [./globals.d.ts](./globals.d.ts)
+  so that our documentation generator can pick it up, as it
+  expects all globals to be declared in one file.
 
-var Request: {
-  prototype: Request;
-  new (requestInfo: string, requestInit?: RequestInit): Request;
-  new (requestInfo: RequestInit & { url: string }): Request;
-  new (requestInfo: Request, requestInit?: RequestInit): Request;
-};
-
-var Response: {
-  new (body?: Bun.BodyInit | null | undefined, init?: Bun.ResponseInit | undefined): Response;
-  /**
-   * Create a new {@link Response} with a JSON body
-   *
-   * @param body - The body of the response
-   * @param options - options to pass to the response
-   *
-   * @example
-   *
-   * ```ts
-   * const response = Response.json({hi: "there"});
-   * console.assert(
-   *   await response.text(),
-   *   `{"hi":"there"}`
-   * );
-   * ```
-   * -------
-   *
-   * This is syntactic sugar for:
-   * ```js
-   *  new Response(JSON.stringify(body), {headers: { "Content-Type": "application/json" }})
-   * ```
-   * @link https://github.com/whatwg/fetch/issues/1389
-   */
-  json(body?: any, options?: Bun.ResponseInit | number): Response;
-
-  /**
-   * Create a new {@link Response} that redirects to url
-   *
-   * @param url - the URL to redirect to
-   * @param status - the HTTP status code to use for the redirect
-   */
-  // tslint:disable-next-line:unified-signatures
-  redirect(url: string, status?: number): Response;
-
-  /**
-   * Create a new {@link Response} that redirects to url
-   *
-   * @param url - the URL to redirect to
-   * @param options - options to pass to the response
-   */
-  // tslint:disable-next-line:unified-signatures
-  redirect(url: string, options?: Bun.ResponseInit): Response;
-
-  /**
-   * Create a new {@link Response} that has a network error
-   */
-  error(): Response;
-};
-
-type _BunTLSOptions = import("bun").TLSOptions;
-interface BunFetchRequestInitTLS extends _BunTLSOptions {
-  /**
-   * Custom function to check the server identity
-   * @param hostname - The hostname of the server
-   * @param cert - The certificate of the server
-   * @returns An error if the server is unauthorized, otherwise undefined
-   */
-  checkServerIdentity?: NonNullable<import("node:tls").ConnectionOptions["checkServerIdentity"]>;
-}
-
-/**
- * BunFetchRequestInit represents additional options that Bun supports in `fetch()` only.
- *
- * Bun extends the `fetch` API with some additional options, except
- * this interface is not quite a `RequestInit`, because they won't work
- * if passed to `new Request()`. This is why it's a separate type.
  */
-interface BunFetchRequestInit extends RequestInit {
-  /**
-   * Override the default TLS options
-   */
-  tls?: BunFetchRequestInitTLS;
+
+declare module "bun" {
+  type HeadersInit = string[][] | Record<string, string | ReadonlyArray<string>> | Headers;
+  type BodyInit = ReadableStream | Bun.XMLHttpRequestBodyInit | URLSearchParams | AsyncGenerator<Uint8Array>;
+
+  namespace __internal {
+    type LibOrFallbackHeaders = LibDomIsLoaded extends true ? {} : import("undici-types").Headers;
+    type LibOrFallbackRequest = LibDomIsLoaded extends true ? {} : import("undici-types").Request;
+    type LibOrFallbackResponse = LibDomIsLoaded extends true ? {} : import("undici-types").Response;
+    type LibOrFallbackResponseInit = LibDomIsLoaded extends true ? {} : import("undici-types").ResponseInit;
+    type LibOrFallbackRequestInit = LibDomIsLoaded extends true
+      ? {}
+      : Omit<import("undici-types").RequestInit, "body" | "headers"> & {
+          body?: Bun.BodyInit | null | undefined;
+          headers?: Bun.HeadersInit;
+        };
+
+    interface BunHeadersOverride extends LibOrFallbackHeaders {
+      /**
+       * Convert {@link Headers} to a plain JavaScript object.
+       *
+       * About 10x faster than `Object.fromEntries(headers.entries())`
+       *
+       * Called when you run `JSON.stringify(headers)`
+       *
+       * Does not preserve insertion order. Well-known header names are lowercased. Other header names are left as-is.
+       */
+      toJSON(): Record<string, string>;
+
+      /**
+       * Get the total number of headers
+       */
+      readonly count: number;
+
+      /**
+       * Get all headers matching the name
+       *
+       * Only supports `"Set-Cookie"`. All other headers are empty arrays.
+       *
+       * @param name - The header name to get
+       *
+       * @returns An array of header values
+       *
+       * @example
+       * ```ts
+       * const headers = new Headers();
+       * headers.append("Set-Cookie", "foo=bar");
+       * headers.append("Set-Cookie", "baz=qux");
+       * headers.getAll("Set-Cookie"); // ["foo=bar", "baz=qux"]
+       * ```
+       */
+      getAll(name: "set-cookie" | "Set-Cookie"): string[];
+    }
+
+    interface BunRequestOverride extends LibOrFallbackRequest {
+      headers: BunHeadersOverride;
+    }
+
+    interface BunResponseOverride extends LibOrFallbackResponse {
+      headers: BunHeadersOverride;
+    }
+  }
 }
-
-var fetch: {
-  /**
-   * Send a HTTP(s) request
-   *
-   * @param request Request object
-   * @param init A structured value that contains settings for the fetch() request.
-   *
-   * @returns A promise that resolves to {@link Response} object.
-   */
-  (request: Request, init?: BunFetchRequestInit): Promise<Response>;
-
-  /**
-   * Send a HTTP(s) request
-   *
-   * @param url URL string
-   * @param init A structured value that contains settings for the fetch() request.
-   *
-   * @returns A promise that resolves to {@link Response} object.
-   */
-  (url: string | URL | Request, init?: BunFetchRequestInit): Promise<Response>;
-
-  (input: string | URL | globalThis.Request, init?: BunFetchRequestInit): Promise<Response>;
-
-  /**
-   * Start the DNS resolution, TCP connection, and TLS handshake for a request
-   * before the request is actually sent.
-   *
-   * This can reduce the latency of a request when you know there's some
-   * long-running task that will delay the request starting.
-   *
-   * This is a bun-specific API and is not part of the Fetch API specification.
-   */
-  preconnect(url: string | URL): void;
-};

packages/bun-types/ffi.d.ts

@@ -13,6 +13,8 @@
  * that convert JavaScript types to C types and back. Internally,
  * bun uses [tinycc](https://github.com/TinyCC/tinycc), so a big thanks
  * goes to Fabrice Bellard and TinyCC maintainers for making this possible.
+ *
+ * @category FFI
  */
 declare module "bun:ffi" {
   enum FFIType {
@@ -543,14 +545,6 @@ declare module "bun:ffi" {
 
   type Symbols = Readonly<Record<string, FFIFunction>>;
 
-  // /**
-  //  * Compile a callback function
-  //  *
-  //  * Returns a function pointer
-  //  *
-  //  */
-  // export function callback(ffi: FFIFunction, cb: Function): number;
-
   interface Library<Fns extends Symbols> {
     symbols: ConvertFns<Fns>;
 
@@ -608,6 +602,8 @@ declare module "bun:ffi" {
    * that convert JavaScript types to C types and back. Internally,
    * bun uses [tinycc](https://github.com/TinyCC/tinycc), so a big thanks
    * goes to Fabrice Bellard and TinyCC maintainers for making this possible.
+   *
+   * @category FFI
    */
   function dlopen<Fns extends Record<string, FFIFunction>>(
     name: string | import("bun").BunFile | URL,
@@ -626,9 +622,9 @@ declare module "bun:ffi" {
    * JavaScript:
    * ```js
    * import { cc } from "bun:ffi";
-   * import hello from "./hello.c" with {type: "file"};
+   * import source from "./hello.c" with {type: "file"};
    * const {symbols: {hello}} = cc({
-   *   source: hello,
+   *   source,
    *   symbols: {
    *     hello: {
    *       returns: "cstring",
@@ -681,8 +677,9 @@ declare module "bun:ffi" {
      * @example
      * ```js
      * import { cc } from "bun:ffi";
+     * import source from "./hello.c" with {type: "file"};
      * const {symbols: {hello}} = cc({
-     *   source: hello,
+     *   source,
      *   define: {
      *     "NDEBUG": "1",
      *   },
@@ -707,8 +704,9 @@ declare module "bun:ffi" {
      * @example
      * ```js
      * import { cc } from "bun:ffi";
+     * import source from "./hello.c" with {type: "file"};
      * const {symbols: {hello}} = cc({
-     *   source: hello,
+     *   source,
      *   flags: ["-framework CoreFoundation", "-framework Security"],
      *   symbols: {
      *     hello: {
@@ -1024,6 +1022,8 @@ declare module "bun:ffi" {
    *  // Do something with rawPtr
    * }
    * ```
+   *
+   * @category FFI
    */
   function ptr(view: NodeJS.TypedArray | ArrayBufferLike | DataView, byteOffset?: number): Pointer;
 
@@ -1048,8 +1048,9 @@ declare module "bun:ffi" {
    * thing to do safely. Passing an invalid pointer can crash the program and
    * reading beyond the bounds of the pointer will crash the program or cause
    * undefined behavior. Use with care!
+   *
+   * @category FFI
    */
-
   class CString extends String {
     /**
      * Get a string from a UTF-8 encoded C string

packages/bun-types/html-rewriter.d.ts

@@ -147,6 +147,8 @@ declare namespace HTMLRewriterTypes {
  * });
  * rewriter.transform(await fetch("https://remix.run"));
  * ```
+ *
+ * @category HTML Manipulation
  */
 declare class HTMLRewriter {
   constructor();

packages/bun-types/index.d.ts

@@ -1,24 +1,26 @@
 // Project: https://github.com/oven-sh/bun
-// Definitions by: Jarred Sumner <https://github.com/Jarred-Sumner>
+// Definitions by: Bun Contributors <https://github.com/oven-sh/bun/graphs/contributors>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-/// <reference lib="esnext" />
-/// <reference types="ws" />
 /// <reference types="node" />
 
-// contributors: uncomment this to detect conflicts with lib.dom.d.ts
-// /// <reference lib="dom" />
-
-/// <reference path="./bun.d.ts" />
 /// <reference path="./globals.d.ts" />
+/// <reference path="./s3.d.ts" />
 /// <reference path="./fetch.d.ts" />
-/// <reference path="./overrides.d.ts" />
+/// <reference path="./bun.d.ts" />
+/// <reference path="./extensions.d.ts" />
+/// <reference path="./devserver.d.ts" />
 /// <reference path="./ffi.d.ts" />
-/// <reference path="./test.d.ts" />
 /// <reference path="./html-rewriter.d.ts" />
 /// <reference path="./jsc.d.ts" />
 /// <reference path="./sqlite.d.ts" />
+/// <reference path="./test.d.ts" />
 /// <reference path="./wasm.d.ts" />
+/// <reference path="./overrides.d.ts" />
 /// <reference path="./deprecated.d.ts" />
-/// <reference path="./ambient.d.ts" />
-/// <reference path="./devserver.d.ts" />
+
+/// <reference path="./bun.ns.d.ts" />
+
+// @ts-ignore Must disable this so it doesn't conflict with the DOM onmessage type, but still
+// allows us to declare our own globals that Node's types can "see" and not conflict with
+declare var onmessage: never;

packages/bun-types/overrides.d.ts

@@ -1,18 +1,160 @@
 export {};
 
-import type { BunFile, Env, PathLike } from "bun";
-
 declare global {
   namespace NodeJS {
+    interface ProcessEnv extends Bun.Env, ImportMetaEnv {}
+
+    interface Process {
+      readonly version: string;
+      browser: boolean;
+
+      /**
+       * Whether you are using Bun
+       */
+      isBun: true;
+
+      /**
+       * The current git sha of Bun
+       */
+      revision: string;
+
+      reallyExit(code?: number): never;
+      dlopen(module: { exports: any }, filename: string, flags?: number): void;
+      _exiting: boolean;
+      noDeprecation: boolean;
+
+      binding(m: "constants"): {
+        os: typeof import("node:os").constants;
+        fs: typeof import("node:fs").constants;
+        crypto: typeof import("node:crypto").constants;
+        zlib: typeof import("node:zlib").constants;
+        trace: {
+          TRACE_EVENT_PHASE_BEGIN: number;
+          TRACE_EVENT_PHASE_END: number;
+          TRACE_EVENT_PHASE_COMPLETE: number;
+          TRACE_EVENT_PHASE_INSTANT: number;
+          TRACE_EVENT_PHASE_ASYNC_BEGIN: number;
+          TRACE_EVENT_PHASE_ASYNC_STEP_INTO: number;
+          TRACE_EVENT_PHASE_ASYNC_STEP_PAST: number;
+          TRACE_EVENT_PHASE_ASYNC_END: number;
+          TRACE_EVENT_PHASE_NESTABLE_ASYNC_BEGIN: number;
+          TRACE_EVENT_PHASE_NESTABLE_ASYNC_END: number;
+          TRACE_EVENT_PHASE_NESTABLE_ASYNC_INSTANT: number;
+          TRACE_EVENT_PHASE_FLOW_BEGIN: number;
+          TRACE_EVENT_PHASE_FLOW_STEP: number;
+          TRACE_EVENT_PHASE_FLOW_END: number;
+          TRACE_EVENT_PHASE_METADATA: number;
+          TRACE_EVENT_PHASE_COUNTER: number;
+          TRACE_EVENT_PHASE_SAMPLE: number;
+          TRACE_EVENT_PHASE_CREATE_OBJECT: number;
+          TRACE_EVENT_PHASE_SNAPSHOT_OBJECT: number;
+          TRACE_EVENT_PHASE_DELETE_OBJECT: number;
+          TRACE_EVENT_PHASE_MEMORY_DUMP: number;
+          TRACE_EVENT_PHASE_MARK: number;
+          TRACE_EVENT_PHASE_CLOCK_SYNC: number;
+          TRACE_EVENT_PHASE_ENTER_CONTEXT: number;
+          TRACE_EVENT_PHASE_LEAVE_CONTEXT: number;
+          TRACE_EVENT_PHASE_LINK_IDS: number;
+        };
+      };
+      binding(m: "uv"): {
+        errname(code: number): string;
+        UV_E2BIG: number;
+        UV_EACCES: number;
+        UV_EADDRINUSE: number;
+        UV_EADDRNOTAVAIL: number;
+        UV_EAFNOSUPPORT: number;
+        UV_EAGAIN: number;
+        UV_EAI_ADDRFAMILY: number;
+        UV_EAI_AGAIN: number;
+        UV_EAI_BADFLAGS: number;
+        UV_EAI_BADHINTS: number;
+        UV_EAI_CANCELED: number;
+        UV_EAI_FAIL: number;
+        UV_EAI_FAMILY: number;
+        UV_EAI_MEMORY: number;
+        UV_EAI_NODATA: number;
+        UV_EAI_NONAME: number;
+        UV_EAI_OVERFLOW: number;
+        UV_EAI_PROTOCOL: number;
+        UV_EAI_SERVICE: number;
+        UV_EAI_SOCKTYPE: number;
+        UV_EALREADY: number;
+        UV_EBADF: number;
+        UV_EBUSY: number;
+        UV_ECANCELED: number;
+        UV_ECHARSET: number;
+        UV_ECONNABORTED: number;
+        UV_ECONNREFUSED: number;
+        UV_ECONNRESET: number;
+        UV_EDESTADDRREQ: number;
+        UV_EEXIST: number;
+        UV_EFAULT: number;
+        UV_EFBIG: number;
+        UV_EHOSTUNREACH: number;
+        UV_EINTR: number;
+        UV_EINVAL: number;
+        UV_EIO: number;
+        UV_EISCONN: number;
+        UV_EISDIR: number;
+        UV_ELOOP: number;
+        UV_EMFILE: number;
+        UV_EMSGSIZE: number;
+        UV_ENAMETOOLONG: number;
+        UV_ENETDOWN: number;
+        UV_ENETUNREACH: number;
+        UV_ENFILE: number;
+        UV_ENOBUFS: number;
+        UV_ENODEV: number;
+        UV_ENOENT: number;
+        UV_ENOMEM: number;
+        UV_ENONET: number;
+        UV_ENOPROTOOPT: number;
+        UV_ENOSPC: number;
+        UV_ENOSYS: number;
+        UV_ENOTCONN: number;
+        UV_ENOTDIR: number;
+        UV_ENOTEMPTY: number;
+        UV_ENOTSOCK: number;
+        UV_ENOTSUP: number;
+        UV_EOVERFLOW: number;
+        UV_EPERM: number;
+        UV_EPIPE: number;
+        UV_EPROTO: number;
+        UV_EPROTONOSUPPORT: number;
+        UV_EPROTOTYPE: number;
+        UV_ERANGE: number;
+        UV_EROFS: number;
+        UV_ESHUTDOWN: number;
+        UV_ESPIPE: number;
+        UV_ESRCH: number;
+        UV_ETIMEDOUT: number;
+        UV_ETXTBSY: number;
+        UV_EXDEV: number;
+        UV_UNKNOWN: number;
+        UV_EOF: number;
+        UV_ENXIO: number;
+        UV_EMLINK: number;
+        UV_EHOSTDOWN: number;
+        UV_EREMOTEIO: number;
+        UV_ENOTTY: number;
+        UV_EFTYPE: number;
+        UV_EILSEQ: number;
+        UV_ESOCKTNOSUPPORT: number;
+        UV_ENODATA: number;
+        UV_EUNATCH: number;
+      };
+      binding(m: string): object;
+    }
+
     interface ProcessVersions extends Dict<string> {
       bun: string;
     }
-    interface ProcessEnv extends Env {}
   }
 }
 
 declare module "fs/promises" {
-  function exists(path: PathLike): Promise<boolean>;
+  function exists(path: Bun.PathLike): Promise<boolean>;
 }
 
 declare module "tls" {
@@ -22,7 +164,7 @@ declare module "tls" {
      * the well-known CAs curated by Mozilla. Mozilla's CAs are completely
      * replaced when CAs are explicitly specified using this option.
      */
-    ca?: string | Buffer | NodeJS.TypedArray | BunFile | Array<string | Buffer | BunFile> | undefined;
+    ca?: string | Buffer | NodeJS.TypedArray | Bun.BunFile | Array<string | Buffer | Bun.BunFile> | undefined;
     /**
      *  Cert chains in PEM format. One cert chain should be provided per
      *  private key. Each cert chain should consist of the PEM formatted
@@ -38,8 +180,8 @@ declare module "tls" {
       | string
       | Buffer
       | NodeJS.TypedArray
-      | BunFile
-      | Array<string | Buffer | NodeJS.TypedArray | BunFile>
+      | Bun.BunFile
+      | Array<string | Buffer | NodeJS.TypedArray | Bun.BunFile>
       | undefined;
     /**
      * Private keys in PEM format. PEM allows the option of private keys
@@ -54,9 +196,9 @@ declare module "tls" {
     key?:
       | string
       | Buffer
-      | BunFile
+      | Bun.BunFile
       | NodeJS.TypedArray
-      | Array<string | Buffer | BunFile | NodeJS.TypedArray | KeyObject>
+      | Array<string | Buffer | Bun.BunFile | NodeJS.TypedArray | KeyObject>
       | undefined;
   }
 

packages/bun-types/package.json

@@ -9,14 +9,14 @@
     "directory": "packages/bun-types"
   },
   "files": [
-    "*.d.ts",
+    "./*.d.ts",
     "docs/**/*.md",
     "docs/*.md"
   ],
   "homepage": "https://bun.sh",
   "dependencies": {
     "@types/node": "*",
-    "@types/ws": "~8.5.10"
+    "@types/ws": "*"
   },
   "devDependencies": {
     "@biomejs/biome": "^1.5.3",
@@ -27,7 +27,7 @@
   "scripts": {
     "prebuild": "echo $(pwd)",
     "copy-docs": "rm -rf docs && cp -rL ../../docs/ ./docs && find ./docs -type f -name '*.md' -exec sed -i 's/\\$BUN_LATEST_VERSION/'\"${BUN_VERSION#bun-v}\"'/g' {} +",
-    "build": "bun run copy-docs && bun scripts/build.ts && bun run fmt",
+    "build": "bun run copy-docs && bun scripts/build.ts",
     "test": "tsc",
     "fmt": "echo $(which biome) && biome format --write ."
   },

packages/bun-types/s3.d.ts

@@ -0,0 +1,945 @@
+declare module "bun" {
+  /**
+   * Fast incremental writer for files and pipes.
+   *
+   * This uses the same interface as {@link ArrayBufferSink}, but writes to a file or pipe.
+   */
+  interface FileSink {
+    /**
+     * Write a chunk of data to the file.
+     *
+     * If the file descriptor is not writable yet, the data is buffered.
+     */
+    write(chunk: string | ArrayBufferView | ArrayBuffer | SharedArrayBuffer): number;
+    /**
+     * Flush the internal buffer, committing the data to disk or the pipe.
+     */
+    flush(): number | Promise<number>;
+    /**
+     * Close the file descriptor. This also flushes the internal buffer.
+     */
+    end(error?: Error): number | Promise<number>;
+
+    start(options?: {
+      /**
+       * Preallocate an internal buffer of this size
+       * This can significantly improve performance when the chunk size is small
+       */
+      highWaterMark?: number;
+    }): void;
+
+    /**
+     * For FIFOs & pipes, this lets you decide whether Bun's process should
+     * remain alive until the pipe is closed.
+     *
+     * By default, it is automatically managed. While the stream is open, the
+     * process remains alive and once the other end hangs up or the stream
+     * closes, the process exits.
+     *
+     * If you previously called {@link unref}, you can call this again to re-enable automatic management.
+     *
+     * Internally, it will reference count the number of times this is called. By default, that number is 1
+     *
+     * If the file is not a FIFO or pipe, {@link ref} and {@link unref} do
+     * nothing. If the pipe is already closed, this does nothing.
+     */
+    ref(): void;
+
+    /**
+     * For FIFOs & pipes, this lets you decide whether Bun's process should
+     * remain alive until the pipe is closed.
+     *
+     * If you want to allow Bun's process to terminate while the stream is open,
+     * call this.
+     *
+     * If the file is not a FIFO or pipe, {@link ref} and {@link unref} do
+     * nothing. If the pipe is already closed, this does nothing.
+     */
+    unref(): void;
+  }
+
+  interface NetworkSink extends FileSink {
+    /**
+     * Write a chunk of data to the network.
+     *
+     * If the network is not writable yet, the data is buffered.
+     */
+    write(chunk: string | ArrayBufferView | ArrayBuffer | SharedArrayBuffer): number;
+    /**
+     * Flush the internal buffer, committing the data to the network.
+     */
+    flush(): number | Promise<number>;
+    /**
+     * Finish the upload. This also flushes the internal buffer.
+     */
+    end(error?: Error): number | Promise<number>;
+
+    /**
+     * Get the stat of the file.
+     */
+    stat(): Promise<import("node:fs").Stats>;
+  }
+
+  /**
+   * Configuration options for S3 operations
+   */
+  interface S3Options extends BlobPropertyBag {
+    /**
+     * The Access Control List (ACL) policy for the file.
+     * Controls who can access the file and what permissions they have.
+     *
+     * @example
+     *     // Setting public read access
+     *     const file = s3.file("public-file.txt", {
+     *       acl: "public-read",
+     *       bucket: "my-bucket"
+     *     });
+     *
+     * @example
+     *     // Using with presigned URLs
+     *     const url = file.presign({
+     *       acl: "public-read",
+     *       expiresIn: 3600
+     *     });
+     */
+    acl?:
+      | "private"
+      | "public-read"
+      | "public-read-write"
+      | "aws-exec-read"
+      | "authenticated-read"
+      | "bucket-owner-read"
+      | "bucket-owner-full-control"
+      | "log-delivery-write";
+
+    /**
+     * The S3 bucket name. Defaults to `S3_BUCKET` or `AWS_BUCKET` environment variables.
+     *
+     * @example
+     *     // Using explicit bucket
+     *     const file = s3.file("my-file.txt", { bucket: "my-bucket" });
+     *
+     * @example
+     *     // Using environment variables
+     *     // With S3_BUCKET=my-bucket in .env
+     *     const file = s3.file("my-file.txt");
+     */
+    bucket?: string;
+
+    /**
+     * The AWS region. Defaults to `S3_REGION` or `AWS_REGION` environment variables.
+     *
+     * @example
+     *     const file = s3.file("my-file.txt", {
+     *       bucket: "my-bucket",
+     *       region: "us-west-2"
+     *     });
+     */
+    region?: string;
+
+    /**
+     * The access key ID for authentication.
+     * Defaults to `S3_ACCESS_KEY_ID` or `AWS_ACCESS_KEY_ID` environment variables.
+     */
+    accessKeyId?: string;
+
+    /**
+     * The secret access key for authentication.
+     * Defaults to `S3_SECRET_ACCESS_KEY` or `AWS_SECRET_ACCESS_KEY` environment variables.
+     */
+    secretAccessKey?: string;
+
+    /**
+     * Optional session token for temporary credentials.
+     * Defaults to `S3_SESSION_TOKEN` or `AWS_SESSION_TOKEN` environment variables.
+     *
+     * @example
+     *     // Using temporary credentials
+     *     const file = s3.file("my-file.txt", {
+     *       accessKeyId: tempAccessKey,
+     *       secretAccessKey: tempSecretKey,
+     *       sessionToken: tempSessionToken
+     *     });
+     */
+    sessionToken?: string;
+
+    /**
+     * The S3-compatible service endpoint URL.
+     * Defaults to `S3_ENDPOINT` or `AWS_ENDPOINT` environment variables.
+     *
+     * @example
+     *     // AWS S3
+     *     const file = s3.file("my-file.txt", {
+     *       endpoint: "https://s3.us-east-1.amazonaws.com"
+     *     });
+     *
+     * @example
+     *     // Cloudflare R2
+     *     const file = s3.file("my-file.txt", {
+     *       endpoint: "https://<account-id>.r2.cloudflarestorage.com"
+     *     });
+     *
+     * @example
+     *     // DigitalOcean Spaces
+     *     const file = s3.file("my-file.txt", {
+     *       endpoint: "https://<region>.digitaloceanspaces.com"
+     *     });
+     *
+     * @example
+     *     // MinIO (local development)
+     *     const file = s3.file("my-file.txt", {
+     *       endpoint: "http://localhost:9000"
+     *     });
+     */
+    endpoint?: string;
+
+    /**
+     * Use virtual hosted style endpoint. default to false, when true if `endpoint` is informed it will ignore the `bucket`
+     *
+     * @example
+     *     // Using virtual hosted style
+     *     const file = s3.file("my-file.txt", {
+     *       virtualHostedStyle: true,
+     *       endpoint: "https://my-bucket.s3.us-east-1.amazonaws.com"
+     *     });
+     */
+    virtualHostedStyle?: boolean;
+
+    /**
+     * The size of each part in multipart uploads (in bytes).
+     * - Minimum: 5 MiB
+     * - Maximum: 5120 MiB
+     * - Default: 5 MiB
+     *
+     * @example
+     *     // Configuring multipart uploads
+     *     const file = s3.file("large-file.dat", {
+     *       partSize: 10 * 1024 * 1024, // 10 MiB parts
+     *       queueSize: 4  // Upload 4 parts in parallel
+     *     });
+     *
+     *     const writer = file.writer();
+     *     // ... write large file in chunks
+     */
+    partSize?: number;
+
+    /**
+     * Number of parts to upload in parallel for multipart uploads.
+     * - Default: 5
+     * - Maximum: 255
+     *
+     * Increasing this value can improve upload speeds for large files
+     * but will use more memory.
+     */
+    queueSize?: number;
+
+    /**
+     * Number of retry attempts for failed uploads.
+     * - Default: 3
+     * - Maximum: 255
+     *
+     * @example
+     *    // Setting retry attempts
+     *     const file = s3.file("my-file.txt", {
+     *       retry: 5 // Retry failed uploads up to 5 times
+     *     });
+     */
+    retry?: number;
+
+    /**
+     * The Content-Type of the file.
+     * Automatically set based on file extension when possible.
+     *
+     * @example
+     *    // Setting explicit content type
+     *     const file = s3.file("data.bin", {
+     *       type: "application/octet-stream"
+     *     });
+     */
+    type?: string;
+
+    /**
+     * By default, Amazon S3 uses the STANDARD Storage Class to store newly created objects.
+     *
+     * @example
+     *    // Setting explicit Storage class
+     *     const file = s3.file("my-file.json", {
+     *       storageClass: "STANDARD_IA"
+     *     });
+     */
+    storageClass?:
+      | "STANDARD"
+      | "DEEP_ARCHIVE"
+      | "EXPRESS_ONEZONE"
+      | "GLACIER"
+      | "GLACIER_IR"
+      | "INTELLIGENT_TIERING"
+      | "ONEZONE_IA"
+      | "OUTPOSTS"
+      | "REDUCED_REDUNDANCY"
+      | "SNOW"
+      | "STANDARD_IA";
+
+    /**
+     * @deprecated The size of the internal buffer in bytes. Defaults to 5 MiB. use `partSize` and `queueSize` instead.
+     */
+    highWaterMark?: number;
+  }
+
+  /**
+   * Options for generating presigned URLs
+   */
+  interface S3FilePresignOptions extends S3Options {
+    /**
+     * Number of seconds until the presigned URL expires.
+     * - Default: 86400 (1 day)
+     *
+     * @example
+     *     // Short-lived URL
+     *     const url = file.presign({
+     *       expiresIn: 3600 // 1 hour
+     *     });
+     *
+     * @example
+     *     // Long-lived public URL
+     *     const url = file.presign({
+     *       expiresIn: 7 * 24 * 60 * 60, // 7 days
+     *       acl: "public-read"
+     *     });
+     */
+    expiresIn?: number;
+
+    /**
+     * The HTTP method allowed for the presigned URL.
+     *
+     * @example
+     *     // GET URL for downloads
+     *     const downloadUrl = file.presign({
+     *       method: "GET",
+     *       expiresIn: 3600
+     *     });
+     *
+     * @example
+     *     // PUT URL for uploads
+     *     const uploadUrl = file.presign({
+     *       method: "PUT",
+     *       expiresIn: 3600,
+     *       type: "application/json"
+     *     });
+     */
+    method?: "GET" | "POST" | "PUT" | "DELETE" | "HEAD";
+  }
+
+  interface S3Stats {
+    size: number;
+    lastModified: Date;
+    etag: string;
+    type: string;
+  }
+
+  /**
+   * Represents a file in an S3-compatible storage service.
+   * Extends the Blob interface for compatibility with web APIs.
+   *
+   * @category Cloud Storage
+   */
+  interface S3File extends Blob {
+    /**
+     * The size of the file in bytes.
+     * This is a Promise because it requires a network request to determine the size.
+     *
+     * @example
+     *     // Getting file size
+     *     const size = await file.size;
+     *     console.log(`File size: ${size} bytes`);
+     *
+     * @example
+     *     // Check if file is larger than 1MB
+     *     if (await file.size > 1024 * 1024) {
+     *       console.log("Large file detected");
+     *     }
+     */
+    /**
+     * TODO: figure out how to get the typescript types to not error for this property.
+     */
+    // size: Promise<number>;
+
+    /**
+     * Creates a new S3File representing a slice of the original file.
+     * Uses HTTP Range headers for efficient partial downloads.
+     *
+     * @param begin - Starting byte offset
+     * @param end - Ending byte offset (exclusive)
+     * @param contentType - Optional MIME type for the slice
+     * @returns A new S3File representing the specified range
+     *
+     * @example
+     *  // Reading file header
+     *     const header = file.slice(0, 1024);
+     *     const headerText = await header.text();
+     *
+     * @example
+     *     // Reading with content type
+     *     const jsonSlice = file.slice(1024, 2048, "application/json");
+     *     const data = await jsonSlice.json();
+     *
+     * @example
+     *     // Reading from offset to end
+     *     const remainder = file.slice(1024);
+     *     const content = await remainder.text();
+     */
+    slice(begin?: number, end?: number, contentType?: string): S3File;
+    slice(begin?: number, contentType?: string): S3File;
+    slice(contentType?: string): S3File;
+
+    /**
+     * Creates a writable stream for uploading data.
+     * Suitable for large files as it uses multipart upload.
+     *
+     * @param options - Configuration for the upload
+     * @returns A NetworkSink for writing data
+     *
+     * @example
+     *     // Basic streaming write
+     *     const writer = file.writer({
+     *       type: "application/json"
+     *     });
+     *     writer.write('{"hello": ');
+     *     writer.write('"world"}');
+     *     await writer.end();
+     *
+     * @example
+     *     // Optimized large file upload
+     *     const writer = file.writer({
+     *       partSize: 10 * 1024 * 1024, // 10MB parts
+     *       queueSize: 4, // Upload 4 parts in parallel
+     *       retry: 3 // Retry failed parts
+     *     });
+     *
+     *     // Write large chunks of data efficiently
+     *     for (const chunk of largeDataChunks) {
+     *       writer.write(chunk);
+     *     }
+     *     await writer.end();
+     *
+     * @example
+     *     // Error handling
+     *     const writer = file.writer();
+     *     try {
+     *       writer.write(data);
+     *       await writer.end();
+     *     } catch (err) {
+     *       console.error('Upload failed:', err);
+     *       // Writer will automatically abort multipart upload on error
+     *     }
+     */
+    writer(options?: S3Options): NetworkSink;
+
+    /**
+     * Gets a readable stream of the file's content.
+     * Useful for processing large files without loading them entirely into memory.
+     *
+     * @returns A ReadableStream for the file content
+     *
+     * @example
+     *     // Basic streaming read
+     *     const stream = file.stream();
+     *     for await (const chunk of stream) {
+     *       console.log('Received chunk:', chunk);
+     *     }
+     *
+     * @example
+     *     // Piping to response
+     *     const stream = file.stream();
+     *     return new Response(stream, {
+     *       headers: { 'Content-Type': file.type }
+     *     });
+     *
+     * @example
+     *     // Processing large files
+     *     const stream = file.stream();
+     *     const textDecoder = new TextDecoder();
+     *     for await (const chunk of stream) {
+     *       const text = textDecoder.decode(chunk);
+     *       // Process text chunk by chunk
+     *     }
+     */
+    readonly readable: ReadableStream;
+    stream(): ReadableStream;
+
+    /**
+     * The name or path of the file in the bucket.
+     *
+     * @example
+     * const file = s3.file("folder/image.jpg");
+     * console.log(file.name); // "folder/image.jpg"
+     */
+    readonly name?: string;
+
+    /**
+     * The bucket name containing the file.
+     *
+     * @example
+     *    const file = s3.file("s3://my-bucket/file.txt");
+     *    console.log(file.bucket); // "my-bucket"
+     */
+    readonly bucket?: string;
+
+    /**
+     * Checks if the file exists in S3.
+     * Uses HTTP HEAD request to efficiently check existence without downloading.
+     *
+     * @returns Promise resolving to true if file exists, false otherwise
+     *
+     * @example
+     *     // Basic existence check
+     *    if (await file.exists()) {
+     *      console.log("File exists in S3");
+     *    }
+     *
+     * @example
+     *  // With error handling
+     *  try {
+     *    const exists = await file.exists();
+     *    if (!exists) {
+     *      console.log("File not found");
+     *    }
+     *  } catch (err) {
+     *    console.error("Error checking file:", err);
+     *  }
+     */
+    exists(): Promise<boolean>;
+
+    /**
+     * Uploads data to S3.
+     * Supports various input types and automatically handles large files.
+     *
+     * @param data - The data to upload
+     * @param options - Upload configuration options
+     * @returns Promise resolving to number of bytes written
+     *
+     * @example
+     *     // Writing string data
+     *     await file.write("Hello World", {
+     *       type: "text/plain"
+     *     });
+     *
+     * @example
+     *     // Writing JSON
+     *     const data = { hello: "world" };
+     *     await file.write(JSON.stringify(data), {
+     *       type: "application/json"
+     *     });
+     *
+     * @example
+     *     // Writing from Response
+     *     const response = await fetch("https://example.com/data");
+     *     await file.write(response);
+     *
+     * @example
+     *     // Writing with ACL
+     *     await file.write(data, {
+     *       acl: "public-read",
+     *       type: "application/octet-stream"
+     *     });
+     */
+    write(
+      data: string | ArrayBufferView | ArrayBuffer | SharedArrayBuffer | Request | Response | BunFile | S3File | Blob,
+      options?: S3Options,
+    ): Promise<number>;
+
+    /**
+     * Generates a presigned URL for the file.
+     * Allows temporary access to the file without exposing credentials.
+     *
+     * @param options - Configuration for the presigned URL
+     * @returns Presigned URL string
+     *
+     * @example
+     *     // Basic download URL
+     *     const url = file.presign({
+     *       expiresIn: 3600 // 1 hour
+     *     });
+     *
+     * @example
+     *     // Upload URL with specific content type
+     *     const uploadUrl = file.presign({
+     *       method: "PUT",
+     *       expiresIn: 3600,
+     *       type: "image/jpeg",
+     *       acl: "public-read"
+     *     });
+     *
+     * @example
+     *     // URL with custom permissions
+     *     const url = file.presign({
+     *       method: "GET",
+     *       expiresIn: 7 * 24 * 60 * 60, // 7 days
+     *       acl: "public-read"
+     *     });
+     */
+    presign(options?: S3FilePresignOptions): string;
+
+    /**
+     * Deletes the file from S3.
+     *
+     * @returns Promise that resolves when deletion is complete
+     *
+     * @example
+     *     // Basic deletion
+     *     await file.delete();
+     *
+     * @example
+     *     // With error handling
+     *     try {
+     *       await file.delete();
+     *       console.log("File deleted successfully");
+     *     } catch (err) {
+     *       console.error("Failed to delete file:", err);
+     *     }
+     */
+    delete(): Promise<void>;
+
+    /**
+     * Alias for delete() method.
+     * Provided for compatibility with Node.js fs API naming.
+     *
+     * @example
+     * await file.unlink();
+     */
+    unlink: S3File["delete"];
+
+    /**
+     * Get the stat of a file in an S3-compatible storage service.
+     *
+     * @returns Promise resolving to S3Stat
+     */
+    stat(): Promise<S3Stats>;
+  }
+
+  interface S3ListObjectsOptions {
+    /** Limits the response to keys that begin with the specified prefix. */
+    prefix?: string;
+    /** ContinuationToken indicates to S3 that the list is being continued on this bucket with a token. ContinuationToken is obfuscated and is not a real key. You can use this ContinuationToken for pagination of the list results. */
+    continuationToken?: string;
+    /** A delimiter is a character that you use to group keys. */
+    delimiter?: string;
+    /** Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more. */
+    maxKeys?: number;
+    /** StartAfter is where you want S3 to start listing from. S3 starts listing after this specified key. StartAfter can be any key in the bucket. */
+    startAfter?: string;
+    /** Encoding type used by S3 to encode the object keys in the response. Responses are encoded only in UTF-8. An object key can contain any Unicode character. However, the XML 1.0 parser can't parse certain characters, such as characters with an ASCII value from 0 to 10. For characters that aren't supported in XML 1.0, you can add this parameter to request that S3 encode the keys in the response. */
+    encodingType?: "url";
+    /** If you want to return the owner field with each key in the result, then set the FetchOwner field to true. */
+    fetchOwner?: boolean;
+  }
+
+  interface S3ListObjectsResponse {
+    /** All of the keys (up to 1,000) that share the same prefix are grouped together. When counting the total numbers of returns by this API operation, this group of keys is considered as one item.
+     *
+     * A response can contain CommonPrefixes only if you specify a delimiter.
+     *
+     * CommonPrefixes contains all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter.
+     *
+     * CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix.
+     *
+     * For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/. All of the keys that roll up into a common prefix count as a single return when calculating the number of returns. */
+    commonPrefixes?: { prefix: string }[];
+    /** Metadata about each object returned. */
+    contents?: {
+      /** The algorithm that was used to create a checksum of the object. */
+      checksumAlgorithm?: "CRC32" | "CRC32C" | "SHA1" | "SHA256" | "CRC64NVME";
+      /** The checksum type that is used to calculate the object’s checksum value. */
+      checksumType?: "COMPOSITE" | "FULL_OBJECT";
+      /**
+       * The entity tag is a hash of the object. The ETag reflects changes only to the contents of an object, not its metadata. The ETag may or may not be an MD5 digest of the object data. Whether or not it is depends on how the object was created and how it is encrypted as described below:
+       *
+       * - Objects created by the PUT Object, POST Object, or Copy operation, or through the AWS Management Console, and are encrypted by SSE-S3 or plaintext, have ETags that are an MD5 digest of their object data.
+       * - Objects created by the PUT Object, POST Object, or Copy operation, or through the AWS Management Console, and are encrypted by SSE-C or SSE-KMS, have ETags that are not an MD5 digest of their object data.
+       * - If an object is created by either the Multipart Upload or Part Copy operation, the ETag is not an MD5 digest, regardless of the method of encryption. If an object is larger than 16 MB, the AWS Management Console will upload or copy that object as a Multipart Upload, and therefore the ETag will not be an MD5 digest.
+       *
+       * MD5 is not supported by directory buckets.
+       */
+      eTag?: string;
+      /** The name that you assign to an object. You use the object key to retrieve the object. */
+      key: string;
+      /** Creation date of the object. */
+      lastModified?: string;
+      /** The owner of the object */
+      owner?: {
+        /** The ID of the owner. */
+        id?: string;
+        /** The display name of the owner. */
+        displayName?: string;
+      };
+      /** Specifies the restoration status of an object. Objects in certain storage classes must be restored before they can be retrieved. */
+      restoreStatus?: {
+        /** Specifies whether the object is currently being restored. */
+        isRestoreInProgress?: boolean;
+        /** Indicates when the restored copy will expire. This value is populated only if the object has already been restored. */
+        restoreExpiryDate?: string;
+      };
+      /** Size in bytes of the object */
+      size?: number;
+      /** The class of storage used to store the object. */
+      storageClass?:
+        | "STANDARD"
+        | "REDUCED_REDUNDANCY"
+        | "GLACIER"
+        | "STANDARD_IA"
+        | "ONEZONE_IA"
+        | "INTELLIGENT_TIERING"
+        | "DEEP_ARCHIVE"
+        | "OUTPOSTS"
+        | "GLACIER_IR"
+        | "SNOW"
+        | "EXPRESS_ONEZONE";
+    }[];
+    /** If ContinuationToken was sent with the request, it is included in the response. You can use the returned ContinuationToken for pagination of the list response.  */
+    continuationToken?: string;
+    /** Causes keys that contain the same string between the prefix and the first occurrence of the delimiter to be rolled up into a single result element in the CommonPrefixes collection. These rolled-up keys are not returned elsewhere in the response. Each rolled-up result counts as only one return against the MaxKeys value. */
+    delimiter?: string;
+    /** Encoding type used by S3 to encode object key names in the XML response. */
+    encodingType?: "url";
+    /** Set to false if all of the results were returned. Set to true if more keys are available to return. If the number of results exceeds that specified by MaxKeys, all of the results might not be returned. */
+    isTruncated?: boolean;
+    /** KeyCount is the number of keys returned with this request. KeyCount will always be less than or equal to the MaxKeys field. For example, if you ask for 50 keys, your result will include 50 keys or fewer. */
+    keyCount?: number;
+    /** Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more. */
+    maxKeys?: number;
+    /** The bucket name. */
+    name?: string;
+    /** NextContinuationToken is sent when isTruncated is true, which means there are more keys in the bucket that can be listed. The next list requests to S3 can be continued with this NextContinuationToken. NextContinuationToken is obfuscated and is not a real key. */
+    nextContinuationToken?: string;
+    /** Keys that begin with the indicated prefix. */
+    prefix?: string;
+    /** If StartAfter was sent with the request, it is included in the response. */
+    startAfter?: string;
+  }
+
+  /**
+   * A configured S3 bucket instance for managing files.
+   * The instance is callable to create S3File instances and provides methods
+   * for common operations.
+   *
+   * @example
+   *     // Basic bucket setup
+   *     const bucket = new S3Client({
+   *       bucket: "my-bucket",
+   *       accessKeyId: "key",
+   *       secretAccessKey: "secret"
+   *     });
+   *
+   *     // Get file instance
+   *     const file = bucket.file("image.jpg");
+   *
+   *     // Common operations
+   *     await bucket.write("data.json", JSON.stringify({hello: "world"}));
+   *     const url = bucket.presign("file.pdf");
+   *     await bucket.unlink("old.txt");
+   *
+   * @category Cloud Storage
+   */
+  class S3Client {
+    prototype: S3Client;
+    /**
+     * Create a new instance of an S3 bucket so that credentials can be managed
+     * from a single instance instead of being passed to every method.
+     *
+     * @param options The default options to use for the S3 client. Can be
+     * overriden by passing options to the methods.
+     *
+     * ## Keep S3 credentials in a single instance
+     *
+     * @example
+     *     const bucket = new Bun.S3Client({
+     *       accessKeyId: "your-access-key",
+     *       secretAccessKey: "your-secret-key",
+     *       bucket: "my-bucket",
+     *       endpoint: "https://s3.us-east-1.amazonaws.com",
+     *       sessionToken: "your-session-token",
+     *     });
+     *
+     *     // S3Client is callable, so you can do this:
+     *     const file = bucket.file("my-file.txt");
+     *
+     *     // or this:
+     *     await file.write("Hello Bun!");
+     *     await file.text();
+     *
+     *     // To delete the file:
+     *     await bucket.delete("my-file.txt");
+     *
+     *     // To write a file without returning the instance:
+     *     await bucket.write("my-file.txt", "Hello Bun!");
+     *
+     */
+    constructor(options?: S3Options);
+
+    /**
+     * Creates an S3File instance for the given path.
+     *
+     * @example
+     * const file = bucket.file("image.jpg");
+     * await file.write(imageData);
+     * const configFile = bucket.file("config.json", {
+     *   type: "application/json",
+     *   acl: "private"
+     * });
+     */
+    file(path: string, options?: S3Options): S3File;
+
+    /**
+     * Writes data directly to a path in the bucket.
+     * Supports strings, buffers, streams, and web API types.
+     *
+     * @example
+     *     // Write string
+     *     await bucket.write("hello.txt", "Hello World");
+     *
+     *     // Write JSON with type
+     *     await bucket.write(
+     *       "data.json",
+     *       JSON.stringify({hello: "world"}),
+     *       {type: "application/json"}
+     *     );
+     *
+     *     // Write from fetch
+     *     const res = await fetch("https://example.com/data");
+     *     await bucket.write("data.bin", res);
+     *
+     *     // Write with ACL
+     *     await bucket.write("public.html", html, {
+     *       acl: "public-read",
+     *       type: "text/html"
+     *     });
+     */
+    write(
+      path: string,
+      data:
+        | string
+        | ArrayBufferView
+        | ArrayBuffer
+        | SharedArrayBuffer
+        | Request
+        | Response
+        | BunFile
+        | S3File
+        | Blob
+        | File,
+      options?: S3Options,
+    ): Promise<number>;
+
+    /**
+     * Generate a presigned URL for temporary access to a file.
+     * Useful for generating upload/download URLs without exposing credentials.
+     *
+     * @example
+     *     // Download URL
+     *     const downloadUrl = bucket.presign("file.pdf", {
+     *       expiresIn: 3600 // 1 hour
+     *     });
+     *
+     *     // Upload URL
+     *     const uploadUrl = bucket.presign("uploads/image.jpg", {
+     *       method: "PUT",
+     *       expiresIn: 3600,
+     *       type: "image/jpeg",
+     *       acl: "public-read"
+     *     });
+     *
+     *     // Long-lived public URL
+     *     const publicUrl = bucket.presign("public/doc.pdf", {
+     *       expiresIn: 7 * 24 * 60 * 60, // 7 days
+     *       acl: "public-read"
+     *     });
+     */
+    presign(path: string, options?: S3FilePresignOptions): string;
+
+    /**
+     * Delete a file from the bucket.
+     *
+     * @example
+     *     // Simple delete
+     *     await bucket.unlink("old-file.txt");
+     *
+     *     // With error handling
+     *     try {
+     *       await bucket.unlink("file.dat");
+     *       console.log("File deleted");
+     *     } catch (err) {
+     *       console.error("Delete failed:", err);
+     *     }
+     */
+    unlink(path: string, options?: S3Options): Promise<void>;
+    delete: S3Client["unlink"];
+
+    /**
+     * Get the size of a file in bytes.
+     * Uses HEAD request to efficiently get size.
+     *
+     * @example
+     *     // Get size
+     *     const bytes = await bucket.size("video.mp4");
+     *     console.log(`Size: ${bytes} bytes`);
+     *
+     *     // Check if file is large
+     *     if (await bucket.size("data.zip") > 100 * 1024 * 1024) {
+     *       console.log("File is larger than 100MB");
+     *     }
+     */
+    size(path: string, options?: S3Options): Promise<number>;
+
+    /**
+     * Check if a file exists in the bucket.
+     * Uses HEAD request to check existence.
+     *
+     * @example
+     *     // Check existence
+     *     if (await bucket.exists("config.json")) {
+     *       const file = bucket.file("config.json");
+     *       const config = await file.json();
+     *     }
+     *
+     *     // With error handling
+     *     try {
+     *       if (!await bucket.exists("required.txt")) {
+     *         throw new Error("Required file missing");
+     *       }
+     *     } catch (err) {
+     *       console.error("Check failed:", err);
+     *     }
+     */
+    exists(path: string, options?: S3Options): Promise<boolean>;
+    /**
+     * Get the stat of a file in an S3-compatible storage service.
+     *
+     * @param path The path to the file.
+     * @param options The options to use for the S3 client.
+     */
+    stat(path: string, options?: S3Options): Promise<S3Stats>;
+
+    /** Returns some or all (up to 1,000) of the objects in a bucket with each request.
+     *
+     * You can  use the request parameters as selection criteria to return a subset of the objects in a bucket.
+     */
+    list(
+      input?: S3ListObjectsOptions | null,
+      options?: Pick<S3Options, "accessKeyId" | "secretAccessKey" | "sessionToken" | "region" | "bucket" | "endpoint">,
+    ): Promise<S3ListObjectsResponse>;
+
+    static list(
+      input?: S3ListObjectsOptions | null,
+      options?: Pick<S3Options, "accessKeyId" | "secretAccessKey" | "sessionToken" | "region" | "bucket" | "endpoint">,
+    ): Promise<S3ListObjectsResponse>;
+  }
+
+  /**
+   * A default instance of S3Client
+   *
+   * Pulls credentials from environment variables. Use `new Bun.S3Client()` if you need to explicitly set credentials.
+   *
+   * @category Cloud Storage
+   */
+  var s3: S3Client;
+}

packages/bun-types/sqlite.d.ts

@@ -6,7 +6,7 @@
  * ```ts
  * import { Database } from 'bun:sqlite';
  *
- * var db = new Database('app.db');
+ * const db = new Database('app.db');
  * db.query('SELECT * FROM users WHERE name = ?').all('John');
  * // => [{ id: 1, name: 'John' }]
  * ```
@@ -24,40 +24,44 @@
  * | `null` | `NULL` |
  */
 declare module "bun:sqlite" {
+  /**
+   * A SQLite3 database
+   *
+   * @example
+   * ```ts
+   * const db = new Database("mydb.sqlite");
+   * db.run("CREATE TABLE foo (bar TEXT)");
+   * db.run("INSERT INTO foo VALUES (?)", ["baz"]);
+   * console.log(db.query("SELECT * FROM foo").all());
+   * ```
+   *
+   * @example
+   *
+   * Open an in-memory database
+   *
+   * ```ts
+   * const db = new Database(":memory:");
+   * db.run("CREATE TABLE foo (bar TEXT)");
+   * db.run("INSERT INTO foo VALUES (?)", ["hiiiiii"]);
+   * console.log(db.query("SELECT * FROM foo").all());
+   * ```
+   *
+   * @example
+   *
+   * Open read-only
+   *
+   * ```ts
+   * const db = new Database("mydb.sqlite", {readonly: true});
+   * ```
+   *
+   * @category Database
+   */
   export class Database implements Disposable {
     /**
      * Open or create a SQLite3 database
      *
      * @param filename The filename of the database to open. Pass an empty string (`""`) or `":memory:"` or undefined for an in-memory database.
      * @param options defaults to `{readwrite: true, create: true}`. If a number, then it's treated as `SQLITE_OPEN_*` constant flags.
-     *
-     * @example
-     *
-     * ```ts
-     * const db = new Database("mydb.sqlite");
-     * db.run("CREATE TABLE foo (bar TEXT)");
-     * db.run("INSERT INTO foo VALUES (?)", ["baz"]);
-     * console.log(db.query("SELECT * FROM foo").all());
-     * ```
-     *
-     * @example
-     *
-     * Open an in-memory database
-     *
-     * ```ts
-     * const db = new Database(":memory:");
-     * db.run("CREATE TABLE foo (bar TEXT)");
-     * db.run("INSERT INTO foo VALUES (?)", ["hiiiiii"]);
-     * console.log(db.query("SELECT * FROM foo").all());
-     * ```
-     *
-     * @example
-     *
-     * Open read-only
-     *
-     * ```ts
-     * const db = new Database("mydb.sqlite", {readonly: true});
-     * ```
      */
     constructor(
       filename?: string,
@@ -567,6 +571,8 @@ declare module "bun:sqlite" {
    *
    * This is returned by {@link Database.prepare} and {@link Database.query}.
    *
+   * @category Database
+   *
    * @example
    * ```ts
    * const stmt = db.prepare("SELECT * FROM foo WHERE bar = ?");

packages/bun-types/test.d.ts

@@ -16,6 +16,8 @@
 declare module "bun:test" {
   /**
    * -- Mocks --
+   *
+   * @category Testing
    */
   export type Mock<T extends (...args: any[]) => any> = JestMock.Mock<T>;
 
@@ -149,6 +151,10 @@ declare module "bun:test" {
     methodOrPropertyValue: K,
   ): Mock<T[K] extends (...args: any[]) => any ? T[K] : never>;
 
+  interface FunctionLike {
+    readonly name: string;
+  }
+
   /**
    * Describes a group of related tests.
    *
@@ -164,11 +170,9 @@ declare module "bun:test" {
    *
    * @param label the label for the tests
    * @param fn the function that defines the tests
+   *
+   * @category Testing
    */
-
-  interface FunctionLike {
-    readonly name: string;
-  }
   export interface Describe {
     (fn: () => void): void;
 
@@ -352,6 +356,8 @@ declare module "bun:test" {
    * @param label the label for the test
    * @param fn the test function
    * @param options the test timeout or options
+   *
+   * @category Testing
    */
   export interface Test {
     (
@@ -420,7 +426,6 @@ declare module "bun:test" {
      *
      * @param label the label for the test
      * @param fn the test function
-     * @param options the test timeout or options
      */
     failing(label: string, fn?: (() => void | Promise<unknown>) | ((done: (err?: unknown) => void) => void)): void;
     /**
@@ -1778,10 +1783,6 @@ declare module "bun:test" {
   type MatcherContext = MatcherUtils & MatcherState;
 }
 
-declare module "test" {
-  export type * from "bun:test";
-}
-
 declare namespace JestMock {
   /**
    * Copyright (c) Meta Platforms, Inc. and affiliates.

packages/bun-types/test/env.test.ts

@@ -1,25 +0,0 @@
-import { expectType } from "./utilities.test";
-
-declare module "bun" {
-  interface Env {
-    FOO: "FOO";
-  }
-}
-expectType<"FOO">(process.env.FOO);
-
-declare global {
-  // eslint-disable-next-line @typescript-eslint/no-namespace
-  namespace NodeJS {
-    interface ProcessEnv {
-      BAR: "BAR";
-    }
-  }
-}
-
-expectType<"BAR">(process.env.BAR);
-
-process.env.FOO;
-process.env.BAR;
-process.env.OTHER;
-Bun.env.FOO;
-Bun.env.BAR;

packages/bun-types/test/index.test.ts

@@ -1,2 +0,0 @@
-Bun.spawn(["echo", '"hi"']);
-performance;

packages/bun-types/test/serve.test.ts

@@ -1,178 +0,0 @@
-Bun.serve({
-  fetch(req) {
-    console.log(req.url); // => http://localhost:3000/
-    return new Response("Hello World");
-  },
-});
-
-Bun.serve({
-  fetch(req) {
-    console.log(req.url); // => http://localhost:3000/
-    return new Response("Hello World");
-  },
-  keyFile: "ca.pem",
-  certFile: "cert.pem",
-});
-
-Bun.serve({
-  websocket: {
-    message(ws, message) {
-      ws.send(message);
-    },
-  },
-
-  fetch(req, server) {
-    // Upgrade to a ServerWebSocket if we can
-    // This automatically checks for the `Sec-WebSocket-Key` header
-    // meaning you don't have to check headers, you can just call `upgrade()`
-    if (server.upgrade(req)) {
-      // When upgrading, we return undefined since we don't want to send a Response
-      return;
-    }
-
-    return new Response("Regular HTTP response");
-  },
-});
-
-Bun.serve<{
-  name: string;
-}>({
-  fetch(req, server) {
-    const url = new URL(req.url);
-    if (url.pathname === "/chat") {
-      if (
-        server.upgrade(req, {
-          data: {
-            name: new URL(req.url).searchParams.get("name") || "Friend",
-          },
-          headers: {
-            "Set-Cookie": "name=" + new URL(req.url).searchParams.get("name"),
-          },
-        })
-      ) {
-        return;
-      }
-    }
-
-    return new Response("Expected a websocket connection", { status: 400 });
-  },
-
-  websocket: {
-    open(ws) {
-      console.log("WebSocket opened");
-      ws.subscribe("the-group-chat");
-    },
-
-    message(ws, message) {
-      ws.publish("the-group-chat", `${ws.data.name}: ${message.toString()}`);
-    },
-
-    close(ws, code, reason) {
-      ws.publish("the-group-chat", `${ws.data.name} left the chat`);
-    },
-
-    drain(ws) {
-      console.log("Please send me data. I am ready to receive it.");
-    },
-
-    perMessageDeflate: true,
-  },
-});
-
-Bun.serve({
-  fetch(req) {
-    throw new Error("woops!");
-  },
-  error(error) {
-    return new Response(`<pre>${error.message}\n${error.stack}</pre>`, {
-      headers: {
-        "Content-Type": "text/html",
-      },
-    });
-  },
-});
-
-export {};
-
-Bun.serve({
-  port: 1234,
-  fetch(req, server) {
-    server.upgrade(req);
-    if (Math.random() > 0.5) return undefined;
-    return new Response();
-  },
-  websocket: { message() {} },
-});
-
-Bun.serve({
-  unix: "/tmp/bun.sock",
-  fetch() {
-    return new Response();
-  },
-});
-
-Bun.serve({
-  unix: "/tmp/bun.sock",
-  fetch(req, server) {
-    server.upgrade(req);
-    if (Math.random() > 0.5) return undefined;
-    return new Response();
-  },
-  websocket: { message() {} },
-});
-
-Bun.serve({
-  unix: "/tmp/bun.sock",
-  fetch() {
-    return new Response();
-  },
-  tls: {},
-});
-
-Bun.serve({
-  unix: "/tmp/bun.sock",
-  fetch(req, server) {
-    server.upgrade(req);
-    if (Math.random() > 0.5) return undefined;
-    return new Response();
-  },
-  websocket: { message() {} },
-  tls: {},
-});
-
-Bun.serve({
-  fetch(req, server) {
-    server.upgrade(req);
-  },
-  websocket: {
-    open(ws) {
-      console.log("WebSocket opened");
-      ws.subscribe("test-channel");
-    },
-
-    message(ws, message) {
-      ws.publish("test-channel", `${message.toString()}`);
-    },
-    perMessageDeflate: true,
-  },
-});
-// Bun.serve({
-//   unix: "/tmp/bun.sock",
-//   // @ts-expect-error
-//   port: 1234,
-//   fetch() {
-//     return new Response();
-//   },
-// });
-
-// Bun.serve({
-//   unix: "/tmp/bun.sock",
-//   // @ts-expect-error
-//   port: 1234,
-//   fetch(req, server) {
-//     server.upgrade(req);
-//     if (Math.random() > 0.5) return undefined;
-//     return new Response();
-//   },
-//   websocket: { message() {} },
-// });

packages/bun-types/test/streams.test.ts

@@ -1,23 +0,0 @@
-new ReadableStream({
-  start(controller) {
-    controller.enqueue("hello");
-    controller.enqueue("world");
-    controller.close();
-  },
-});
-
-// this will have type errors when lib.dom.d.ts is present
-// afaik this isn't fixable
-new ReadableStream({
-  type: "direct",
-  pull(controller) {
-    // eslint-disable-next-line
-    controller.write("hello");
-    // eslint-disable-next-line
-    controller.write("world");
-    controller.close();
-  },
-  cancel() {
-    // called if stream.cancel() is called
-  },
-});

packages/bun-types/test/utilities.test.ts

@@ -1,8 +0,0 @@
-// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
-export declare const expectType: <T>(expression: T) => void;
-// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
-export declare const expectAssignable: <T>(expression: T) => void;
-// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
-export declare const expectNotAssignable: <T>(expression: any) => void;
-// eslint-disable-next-line @definitelytyped/no-unnecessary-generics
-export declare const expectTypeEquals: <T, S>(expression: T extends S ? (S extends T ? true : false) : false) => void;

packages/bun-types/tsconfig.json

@@ -1,12 +1,12 @@
 {
-	"extends": "../../tsconfig.base.json",
-	"compilerOptions": {
-		"skipLibCheck": true,
-		"declaration": true,
-		"emitDeclarationOnly": true,
-		"noEmit": false,
-		"declarationDir": "out"
-	},
-	"include": ["**/*.ts"],
-	"exclude": ["dist", "node_modules"]
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "skipLibCheck": true,
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "noEmit": false,
+    "declarationDir": "out"
+  },
+  "include": ["**/*.ts"],
+  "exclude": ["dist", "node_modules"]
 }

packages/bun-types/wasm.d.ts

@@ -1,270 +1,193 @@
-export {};
-
-type _Global<T extends Bun.WebAssembly.ValueType = Bun.WebAssembly.ValueType> = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { Global: infer T };
-}
-  ? T
-  : Bun.WebAssembly.Global<T>;
-
-type _CompileError = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { CompileError: infer T };
-}
-  ? T
-  : Bun.WebAssembly.CompileError;
-
-type _LinkError = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { LinkError: infer T };
-}
-  ? T
-  : Bun.WebAssembly.LinkError;
-
-type _RuntimeError = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { RuntimeError: infer T };
-}
-  ? T
-  : Bun.WebAssembly.RuntimeError;
-
-type _Memory = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { Memory: infer T };
-}
-  ? T
-  : Bun.WebAssembly.Memory;
-
-type _Instance = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { Instance: infer T };
-}
-  ? T
-  : Bun.WebAssembly.Instance;
-
-type _Module = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { Module: infer T };
-}
-  ? T
-  : Bun.WebAssembly.Module;
-
-type _Table = typeof globalThis extends {
-  onerror: any;
-  WebAssembly: { Table: infer T };
-}
-  ? T
-  : Bun.WebAssembly.Table;
-
-declare global {
-  namespace Bun {
-    namespace WebAssembly {
-      type ImportExportKind = "function" | "global" | "memory" | "table";
-      type TableKind = "anyfunc" | "externref";
-      // eslint-disable-next-line @typescript-eslint/ban-types
-      type ExportValue = Function | Global | WebAssembly.Memory | WebAssembly.Table;
-      type Exports = Record<string, ExportValue>;
-      type ImportValue = ExportValue | number;
-      type Imports = Record<string, ModuleImports>;
-      type ModuleImports = Record<string, ImportValue>;
-
-      interface ValueTypeMap {
-        // eslint-disable-next-line @typescript-eslint/ban-types
-        anyfunc: Function;
-        externref: any;
-        f32: number;
-        f64: number;
-        i32: number;
-        i64: bigint;
-        v128: never;
-      }
-
-      type ValueType = keyof ValueTypeMap;
-
-      interface GlobalDescriptor<T extends ValueType = ValueType> {
-        mutable?: boolean;
-        value: T;
-      }
-
-      interface Global<T extends ValueType = ValueType> {
-        // <T extends ValueType = ValueType> {
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/value) */
-        value: ValueTypeMap[T];
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/valueOf) */
-        valueOf(): ValueTypeMap[T];
-      }
-
-      interface CompileError extends Error {}
-
-      interface LinkError extends Error {}
-
-      interface RuntimeError extends Error {}
-
-      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance) */
-      interface Instance {
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance/exports) */
-        readonly exports: Exports;
-      }
-
-      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) */
-      interface Memory {
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/buffer) */
-        readonly buffer: ArrayBuffer;
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/grow) */
-        grow(delta: number): number;
-      }
-
-      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module) */
-      interface Module {}
-
-      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table) */
-      interface Table {
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/length) */
-        readonly length: number;
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/get) */
-        get(index: number): any;
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/grow) */
-        grow(delta: number, value?: any): number;
-        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/set) */
-        set(index: number, value?: any): void;
-      }
-
-      interface MemoryDescriptor {
-        initial: number;
-        maximum?: number;
-        shared?: boolean;
-      }
-
-      interface ModuleExportDescriptor {
-        kind: ImportExportKind;
-        name: string;
-      }
-
-      interface ModuleImportDescriptor {
-        kind: ImportExportKind;
-        module: string;
-        name: string;
-      }
-
-      interface TableDescriptor {
-        element: TableKind;
-        initial: number;
-        maximum?: number;
-      }
-
-      interface WebAssemblyInstantiatedSource {
-        instance: Instance;
-        module: Module;
-      }
-    }
-  }
-
+declare module "bun" {
   namespace WebAssembly {
-    interface ValueTypeMap extends Bun.WebAssembly.ValueTypeMap {}
-    interface GlobalDescriptor<T extends keyof ValueTypeMap = keyof ValueTypeMap>
-      extends Bun.WebAssembly.GlobalDescriptor<T> {}
-    interface MemoryDescriptor extends Bun.WebAssembly.MemoryDescriptor {}
-    interface ModuleExportDescriptor extends Bun.WebAssembly.ModuleExportDescriptor {}
-    interface ModuleImportDescriptor extends Bun.WebAssembly.ModuleImportDescriptor {}
-    interface TableDescriptor extends Bun.WebAssembly.TableDescriptor {}
-    interface WebAssemblyInstantiatedSource extends Bun.WebAssembly.WebAssemblyInstantiatedSource {}
+    type ImportExportKind = "function" | "global" | "memory" | "table";
+    type TableKind = "anyfunc" | "externref";
+    type ExportValue = Function | Global | WebAssembly.Memory | WebAssembly.Table;
+    type Exports = Record<string, ExportValue>;
+    type ImportValue = ExportValue | number;
+    type Imports = Record<string, ModuleImports>;
+    type ModuleImports = Record<string, ImportValue>;
 
-    interface LinkError extends _LinkError {}
-    var LinkError: {
-      prototype: LinkError;
-      new (message?: string): LinkError;
-      (message?: string): LinkError;
-    };
-
-    interface CompileError extends _CompileError {}
-    var CompileError: typeof globalThis extends {
-      onerror: any;
-      WebAssembly: { CompileError: infer T };
+    interface ValueTypeMap {
+      anyfunc: Function;
+      externref: any;
+      f32: number;
+      f64: number;
+      i32: number;
+      i64: bigint;
+      v128: never;
     }
-      ? T
-      : {
-          prototype: CompileError;
-          new (message?: string): CompileError;
-          (message?: string): CompileError;
-        };
 
-    interface RuntimeError extends _RuntimeError {}
-    var RuntimeError: {
-      prototype: RuntimeError;
-      new (message?: string): RuntimeError;
-      (message?: string): RuntimeError;
-    };
+    type ValueType = keyof ValueTypeMap;
 
-    interface Global<T extends keyof ValueTypeMap = keyof ValueTypeMap> extends _Global<T> {}
-    var Global: typeof globalThis extends {
-      onerror: any;
-      WebAssembly: { Global: infer T };
+    interface GlobalDescriptor<T extends ValueType = ValueType> {
+      mutable?: boolean;
+      value: T;
     }
-      ? T
-      : {
-          prototype: Global;
-          new <T extends Bun.WebAssembly.ValueType = Bun.WebAssembly.ValueType>(
-            descriptor: GlobalDescriptor<T>,
-            v?: ValueTypeMap[T],
-          ): Global<T>;
-        };
 
-    interface Instance extends _Instance {}
-    var Instance: typeof globalThis extends {
-      onerror: any;
-      WebAssembly: { Instance: infer T };
+    interface Global<T extends ValueType = ValueType> {
+      // <T extends ValueType = ValueType> {
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/value) */
+      value: ValueTypeMap[T];
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Global/valueOf) */
+      valueOf(): ValueTypeMap[T];
     }
-      ? T
-      : {
-          prototype: Instance;
-          new (module: Module, importObject?: Bun.WebAssembly.Imports): Instance;
-        };
 
-    interface Memory extends _Memory {}
-    var Memory: {
-      prototype: Memory;
-      new (descriptor: MemoryDescriptor): Memory;
-    };
+    interface CompileError extends Error {}
 
-    interface Module extends _Module {}
-    var Module: typeof globalThis extends {
-      onerror: any;
-      WebAssembly: { Module: infer T };
+    interface LinkError extends Error {}
+
+    interface RuntimeError extends Error {}
+
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance) */
+    interface Instance {
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance/exports) */
+      readonly exports: Exports;
     }
-      ? T
-      : {
-          prototype: Module;
-          new (bytes: Bun.BufferSource): Module;
-          /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/customSections) */
-          customSections(moduleObject: Module, sectionName: string): ArrayBuffer[];
-          /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/exports) */
-          exports(moduleObject: Module): ModuleExportDescriptor[];
-          /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/imports) */
-          imports(moduleObject: Module): ModuleImportDescriptor[];
-        };
 
-    interface Table extends _Table {}
-    var Table: {
-      prototype: Table;
-      new (descriptor: TableDescriptor, value?: any): Table;
-    };
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) */
+    interface Memory {
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/buffer) */
+      readonly buffer: ArrayBuffer;
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory/grow) */
+      grow(delta: number): number;
+    }
 
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/compile) */
-    function compile(bytes: Bun.BufferSource): Promise<Module>;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/compileStreaming) */
-    function compileStreaming(source: Response | PromiseLike<Response>): Promise<Module>;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiate) */
-    function instantiate(
-      bytes: Bun.BufferSource,
-      importObject?: Bun.WebAssembly.Imports,
-    ): Promise<WebAssemblyInstantiatedSource>;
-    function instantiate(moduleObject: Module, importObject?: Bun.WebAssembly.Imports): Promise<Instance>;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiateStreaming) */
-    function instantiateStreaming(
-      source: Response | PromiseLike<Response>,
-      importObject?: Bun.WebAssembly.Imports,
-    ): Promise<WebAssemblyInstantiatedSource>;
-    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/validate) */
-    function validate(bytes: Bun.BufferSource): boolean;
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module) */
+    interface Module {}
+
+    /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table) */
+    interface Table {
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/length) */
+      readonly length: number;
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/get) */
+      get(index: number): any;
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/grow) */
+      grow(delta: number, value?: any): number;
+      /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Table/set) */
+      set(index: number, value?: any): void;
+    }
+
+    interface MemoryDescriptor {
+      initial: number;
+      maximum?: number;
+      shared?: boolean;
+    }
+
+    interface ModuleExportDescriptor {
+      kind: ImportExportKind;
+      name: string;
+    }
+
+    interface ModuleImportDescriptor {
+      kind: ImportExportKind;
+      module: string;
+      name: string;
+    }
+
+    interface TableDescriptor {
+      element: TableKind;
+      initial: number;
+      maximum?: number;
+    }
+
+    interface WebAssemblyInstantiatedSource {
+      instance: Instance;
+      module: Module;
+    }
   }
 }
+
+declare namespace WebAssembly {
+  interface ValueTypeMap extends Bun.WebAssembly.ValueTypeMap {}
+  interface GlobalDescriptor<T extends keyof ValueTypeMap = keyof ValueTypeMap>
+    extends Bun.WebAssembly.GlobalDescriptor<T> {}
+  interface MemoryDescriptor extends Bun.WebAssembly.MemoryDescriptor {}
+  interface ModuleExportDescriptor extends Bun.WebAssembly.ModuleExportDescriptor {}
+  interface ModuleImportDescriptor extends Bun.WebAssembly.ModuleImportDescriptor {}
+  interface TableDescriptor extends Bun.WebAssembly.TableDescriptor {}
+  interface WebAssemblyInstantiatedSource extends Bun.WebAssembly.WebAssemblyInstantiatedSource {}
+
+  interface LinkError extends Bun.WebAssembly.LinkError {}
+  var LinkError: {
+    prototype: LinkError;
+    new (message?: string): LinkError;
+    (message?: string): LinkError;
+  };
+
+  interface CompileError extends Bun.WebAssembly.CompileError {}
+  var CompileError: {
+    prototype: CompileError;
+    new (message?: string): CompileError;
+    (message?: string): CompileError;
+  };
+
+  interface RuntimeError extends Bun.WebAssembly.RuntimeError {}
+  var RuntimeError: {
+    prototype: RuntimeError;
+    new (message?: string): RuntimeError;
+    (message?: string): RuntimeError;
+  };
+
+  interface Global<T extends keyof ValueTypeMap = keyof ValueTypeMap> extends Bun.WebAssembly.Global<T> {}
+  var Global: {
+    prototype: Global;
+    new <T extends Bun.WebAssembly.ValueType = Bun.WebAssembly.ValueType>(
+      descriptor: GlobalDescriptor<T>,
+      v?: ValueTypeMap[T],
+    ): Global<T>;
+  };
+
+  interface Instance extends Bun.WebAssembly.Instance {}
+  var Instance: {
+    prototype: Instance;
+    new (module: Module, importObject?: Bun.WebAssembly.Imports): Instance;
+  };
+
+  interface Memory extends Bun.WebAssembly.Memory {}
+  var Memory: {
+    prototype: Memory;
+    new (descriptor: MemoryDescriptor): Memory;
+  };
+
+  interface Module extends Bun.WebAssembly.Module {}
+  var Module: Bun.__internal.UseLibDomIfAvailable<
+    "WebAssembly",
+    {
+      Module: {
+        prototype: Module;
+        new (bytes: Bun.BufferSource): Module;
+        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/customSections) */
+        customSections(moduleObject: Module, sectionName: string): ArrayBuffer[];
+        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/exports) */
+        exports(moduleObject: Module): ModuleExportDescriptor[];
+        /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Module/imports) */
+        imports(moduleObject: Module): ModuleImportDescriptor[];
+      };
+    }
+  >["Module"];
+
+  interface Table extends Bun.WebAssembly.Table {}
+  var Table: {
+    prototype: Table;
+    new (descriptor: TableDescriptor, value?: any): Table;
+  };
+
+  /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/compile) */
+  function compile(bytes: Bun.BufferSource): Promise<Module>;
+  /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/compileStreaming) */
+  function compileStreaming(source: Response | PromiseLike<Response>): Promise<Module>;
+  /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiate) */
+  function instantiate(
+    bytes: Bun.BufferSource,
+    importObject?: Bun.WebAssembly.Imports,
+  ): Promise<WebAssemblyInstantiatedSource>;
+  function instantiate(moduleObject: Module, importObject?: Bun.WebAssembly.Imports): Promise<Instance>;
+  /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiateStreaming) */
+  function instantiateStreaming(
+    source: Response | PromiseLike<Response>,
+    importObject?: Bun.WebAssembly.Imports,
+  ): Promise<WebAssemblyInstantiatedSource>;
+  /** [MDN Reference](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/validate) */
+  function validate(bytes: Bun.BufferSource): boolean;
+}

packages/bun-usockets/src/context.c

@@ -72,7 +72,7 @@ void us_socket_context_close(int ssl, struct us_socket_context_t *context) {
     while (ls) {
         struct us_listen_socket_t *nextLS = (struct us_listen_socket_t *) ls->s.next;
         us_listen_socket_close(ssl, ls);
-        
+
         ls = nextLS;
     }
 
@@ -310,7 +310,7 @@ struct us_bun_verify_error_t us_socket_verify_error(int ssl, struct us_socket_t
         }
     #endif
 
-    return (struct us_bun_verify_error_t) { .error = 0, .code = NULL, .reason = NULL };    
+    return (struct us_bun_verify_error_t) { .error = 0, .code = NULL, .reason = NULL };
 }
 
 void us_internal_socket_context_free(int ssl, struct us_socket_context_t *context) {
@@ -337,7 +337,7 @@ void us_socket_context_ref(int ssl, struct us_socket_context_t *context) {
 }
 void us_socket_context_unref(int ssl, struct us_socket_context_t *context) {
     uint32_t ref_count = context->ref_count;
-    context->ref_count--;    
+    context->ref_count--;
     if (ref_count == 1) {
         us_internal_socket_context_free(ssl, context);
     }
@@ -520,7 +520,7 @@ void *us_socket_context_connect(int ssl, struct us_socket_context_t *context, co
     }
 
     struct us_connecting_socket_t *c = us_calloc(1, sizeof(struct us_connecting_socket_t) + socket_ext_size);
-    c->socket_ext_size = socket_ext_size;  
+    c->socket_ext_size = socket_ext_size;
     c->options = options;
     c->ssl = ssl > 0;
     c->timeout = 255;
@@ -641,9 +641,9 @@ void us_internal_socket_after_open(struct us_socket_t *s, int error) {
 
         /* Emit error, close without emitting on_close */
 
-        /* There are two possible states here: 
-            1. It's a us_connecting_socket_t*. DNS resolution failed, or a connection failed. 
-            2. It's a us_socket_t* 
+        /* There are two possible states here:
+            1. It's a us_connecting_socket_t*. DNS resolution failed, or a connection failed.
+            2. It's a us_socket_t*
 
             We differentiate between these two cases by checking if the connect_state is null.
         */
@@ -887,7 +887,7 @@ void us_socket_context_on_connect_error(int ssl, struct us_socket_context_t *con
         return;
     }
 #endif
-    
+
     context->on_connect_error = on_connect_error;
 }
 
@@ -898,7 +898,7 @@ void us_socket_context_on_socket_connect_error(int ssl, struct us_socket_context
         return;
     }
 #endif
-    
+
     context->on_socket_connect_error = on_connect_error;
 }
 

packages/bun-usockets/src/eventing/epoll_kqueue.c

@@ -353,15 +353,21 @@ int kqueue_change(int kqfd, int fd, int old_events, int new_events, void *user_d
     int change_length = 0;
 
     /* Do they differ in readable? */
+    int is_readable =  (new_events & LIBUS_SOCKET_READABLE);
+    int is_writable =  (new_events & LIBUS_SOCKET_WRITABLE);
     if ((new_events & LIBUS_SOCKET_READABLE) != (old_events & LIBUS_SOCKET_READABLE)) {
-        EV_SET64(&change_list[change_length++], fd, EVFILT_READ, (new_events & LIBUS_SOCKET_READABLE) ? EV_ADD : EV_DELETE, 0, 0, (uint64_t)(void*)user_data, 0, 0);
+        EV_SET64(&change_list[change_length++], fd, EVFILT_READ, is_readable ? EV_ADD : EV_DELETE, 0, 0, (uint64_t)(void*)user_data, 0, 0);
     }
-
-    /* Do they differ in writable? */
-    if ((new_events & LIBUS_SOCKET_WRITABLE) != (old_events & LIBUS_SOCKET_WRITABLE)) {
+    
+    if(!is_readable && !is_writable) {
+        if(!(old_events & LIBUS_SOCKET_WRITABLE)) {
+            // if we are not reading or writing, we need to add writable to receive FIN
+            EV_SET64(&change_list[change_length++], fd, EVFILT_WRITE, EV_ADD, 0, 0, (uint64_t)(void*)user_data, 0, 0);
+        }
+    } else if ((new_events & LIBUS_SOCKET_WRITABLE) != (old_events & LIBUS_SOCKET_WRITABLE)) {
+        /* Do they differ in writable? */    
         EV_SET64(&change_list[change_length++], fd, EVFILT_WRITE, (new_events & LIBUS_SOCKET_WRITABLE) ? EV_ADD : EV_DELETE, 0, 0, (uint64_t)(void*)user_data, 0, 0);
-    }
-
+    } 
     int ret;
     do {
         ret = kevent64(kqfd, change_list, change_length, change_list, change_length, KEVENT_FLAG_ERROR_EVENTS, NULL);
@@ -399,6 +405,10 @@ int us_poll_start_rc(struct us_poll_t *p, struct us_loop_t *loop, int events) {
 
 #ifdef LIBUS_USE_EPOLL
     struct epoll_event event;
+    if(!(events & LIBUS_SOCKET_READABLE) && !(events & LIBUS_SOCKET_WRITABLE)) {
+        // if we are disabling readable, we need to add the other events to detect EOF/HUP/ERR
+        events |= EPOLLRDHUP | EPOLLHUP | EPOLLERR;
+    }
     event.events = events;
     event.data.ptr = p;
     int ret;
@@ -423,6 +433,10 @@ void us_poll_change(struct us_poll_t *p, struct us_loop_t *loop, int events) {
 
 #ifdef LIBUS_USE_EPOLL
         struct epoll_event event;
+        if(!(events & LIBUS_SOCKET_READABLE) && !(events & LIBUS_SOCKET_WRITABLE)) {
+             // if we are disabling readable, we need to add the other events to detect EOF/HUP/ERR
+            events |= EPOLLRDHUP | EPOLLHUP | EPOLLERR;
+        }
         event.events = events;
         event.data.ptr = p;
         int rc;

packages/bun-usockets/src/eventing/libuv.c

@@ -104,7 +104,6 @@ void us_poll_change(struct us_poll_t *p, struct us_loop_t *loop, int events) {
         us_internal_poll_type(p) |
         ((events & LIBUS_SOCKET_READABLE) ? POLL_TYPE_POLLING_IN : 0) |
         ((events & LIBUS_SOCKET_WRITABLE) ? POLL_TYPE_POLLING_OUT : 0);
-
     uv_poll_start(p->uv_p, events, poll_cb);
   }
 }

packages/bun-usockets/src/libusockets.h

@@ -472,6 +472,7 @@ int us_socket_raw_write(int ssl, us_socket_r s, const char *data, int length, in
 struct us_socket_t* us_socket_open(int ssl, struct us_socket_t * s, int is_client, char* ip, int ip_length);
 int us_raw_root_certs(struct us_cert_string_t**out);
 unsigned int us_get_remote_address_info(char *buf, us_socket_r s, const char **dest, int *port, int *is_ipv6);
+unsigned int us_get_local_address_info(char *buf, us_socket_r s, const char **dest, int *port, int *is_ipv6);
 int us_socket_get_error(int ssl, us_socket_r s);
 
 void us_socket_ref(us_socket_r s);

packages/bun-usockets/src/loop.c

@@ -213,21 +213,21 @@ void us_internal_free_closed_sockets(struct us_loop_t *loop) {
         us_poll_free((struct us_poll_t *) s, loop);
         s = next;
     }
-    loop->data.closed_head = 0;
+    loop->data.closed_head = NULL;
 
     for (struct us_udp_socket_t *s = loop->data.closed_udp_head; s; ) {
         struct us_udp_socket_t *next = s->next;
         us_poll_free((struct us_poll_t *) s, loop);
         s = next;
     }
-    loop->data.closed_udp_head = 0;
+    loop->data.closed_udp_head = NULL;
 
     for (struct us_connecting_socket_t *s = loop->data.closed_connecting_head; s; ) {
         struct us_connecting_socket_t *next = s->next;
         us_free(s);
         s = next;
     }
-    loop->data.closed_connecting_head = 0;
+    loop->data.closed_connecting_head = NULL;
 }
 
 void us_internal_free_closed_contexts(struct us_loop_t *loop) {
@@ -236,7 +236,7 @@ void us_internal_free_closed_contexts(struct us_loop_t *loop) {
         us_free(ctx);
         ctx = next;
     }
-    loop->data.closed_context_head = 0;
+    loop->data.closed_context_head = NULL;
 }
 
 void sweep_timer_cb(struct us_internal_callback_t *cb) {

packages/bun-usockets/src/socket.c

@@ -37,6 +37,15 @@ int us_socket_local_port(int ssl, struct us_socket_t *s) {
     }
 }
 
+int us_socket_remote_port(int ssl, struct us_socket_t *s) {
+    struct bsd_addr_t addr;
+    if (bsd_remote_addr(us_poll_fd(&s->p), &addr)) {
+        return -1;
+    } else {
+        return bsd_addr_get_port(&addr);
+    }
+}
+
 void us_socket_shutdown_read(int ssl, struct us_socket_t *s) {
     /* This syscall is idempotent so no extra check is needed */
     bsd_shutdown_socket_read(us_poll_fd((struct us_poll_t *) s));
@@ -167,12 +176,13 @@ void us_connecting_socket_close(int ssl, struct us_connecting_socket_t *c) {
     if (!c->pending_resolve_callback) {
         us_connecting_socket_free(ssl, c);
     }
-} 
+}
 
 struct us_socket_t *us_socket_close(int ssl, struct us_socket_t *s, int code, void *reason) {
     if(ssl) {
         return (struct us_socket_t *)us_internal_ssl_socket_close((struct us_internal_ssl_socket_t *) s, code, reason);
     }
+
     if (!us_socket_is_closed(0, s)) {
         /* make sure the context is alive until the callback ends */
         us_socket_context_ref(ssl, s->context);
@@ -227,8 +237,8 @@ struct us_socket_t *us_socket_close(int ssl, struct us_socket_t *s, int code, vo
 
         /* preserve the return value from on_close if its called */
         return res;
-        
     }
+
     return s;
 }
 
@@ -445,18 +455,18 @@ int us_connecting_socket_get_error(int ssl, struct us_connecting_socket_t *c) {
     return c->error;
 }
 
-/* 
+/*
     Note: this assumes that the socket is non-TLS and will be adopted and wrapped with a new TLS context
           context ext will not be copied to the new context, new context will contain us_wrapped_socket_context_t on ext
 */
 struct us_socket_t *us_socket_wrap_with_tls(int ssl, struct us_socket_t *s, struct us_bun_socket_context_options_t options, struct us_socket_events_t events, int socket_ext_size) {
     // only accepts non-TLS sockets
     if (ssl) {
-        return NULL; 
+        return NULL;
     }
 
     return(struct us_socket_t *) us_internal_ssl_socket_wrap_with_tls(s, options, events, socket_ext_size);
-}  
+}
 
 // if a TLS socket calls this, it will start SSL call open event and TLS handshake if required
 // will have no effect if the socket is closed or is not TLS
@@ -500,6 +510,24 @@ unsigned int us_get_remote_address_info(char *buf, struct us_socket_t *s, const
     return length;
 }
 
+unsigned int us_get_local_address_info(char *buf, struct us_socket_t *s, const char **dest, int *port, int *is_ipv6)
+{
+    struct bsd_addr_t addr;
+    if (bsd_local_addr(us_poll_fd(&s->p), &addr)) {
+        return 0;
+    }
+
+    int length = bsd_addr_get_ip_length(&addr);
+    if (!length) {
+        return 0;
+    }
+
+    memcpy(buf, bsd_addr_get_ip(&addr), length);
+    *port = bsd_addr_get_port(&addr);
+
+    return length;
+}
+
 void us_socket_ref(struct us_socket_t *s) {
 #ifdef LIBUS_USE_LIBUV
     uv_ref((uv_handle_t*)s->p.uv_p);
@@ -539,11 +567,6 @@ struct us_loop_t *us_connecting_socket_get_loop(struct us_connecting_socket_t *c
 void us_socket_pause(int ssl, struct us_socket_t *s) {
     // closed cannot be paused because it is already closed
     if(us_socket_is_closed(ssl, s)) return;
-    if(us_socket_is_shut_down(ssl, s)) {
-        // we already sent FIN so we pause all events because we are read-only
-        us_poll_change(&s->p, s->context->loop, 0);
-        return;
-    }
     // we are readable and writable so we can just pause readable side
     us_poll_change(&s->p, s->context->loop, LIBUS_SOCKET_WRITABLE);
 }

packages/bun-uws/src/App.h

@@ -412,14 +412,14 @@ public:
         webSocketContext->getExt()->messageHandler = std::move(behavior.message);
         webSocketContext->getExt()->drainHandler = std::move(behavior.drain);
         webSocketContext->getExt()->subscriptionHandler = std::move(behavior.subscription);
-        webSocketContext->getExt()->closeHandler = std::move([closeHandler = std::move(behavior.close)](WebSocket<SSL, true, UserData> *ws, int code, std::string_view message) mutable {
+        webSocketContext->getExt()->closeHandler = [closeHandler = std::move(behavior.close)](WebSocket<SSL, true, UserData> *ws, int code, std::string_view message) mutable {
             if (closeHandler) {
                 closeHandler(ws, code, message);
             }
 
             /* Destruct user data after returning from close handler */
             ((UserData *) ws->getUserData())->~UserData();
-        });
+        };
         webSocketContext->getExt()->pingHandler = std::move(behavior.ping);
         webSocketContext->getExt()->pongHandler = std::move(behavior.pong);
 
@@ -432,8 +432,8 @@ public:
         webSocketContext->getExt()->maxLifetime = behavior.maxLifetime;
         webSocketContext->getExt()->compression = behavior.compression;
 
-        /* Calculate idleTimeoutCompnents */
-        webSocketContext->getExt()->calculateIdleTimeoutCompnents(behavior.idleTimeout);
+        /* Calculate idleTimeoutComponents */
+        webSocketContext->getExt()->calculateIdleTimeoutComponents(behavior.idleTimeout);
 
         httpContext->onHttp("GET", pattern, [webSocketContext, behavior = std::move(behavior)](auto *res, auto *req) mutable {
 
@@ -619,6 +619,11 @@ public:
         return std::move(*this);
     }
 
+    TemplatedApp &&setUsingCustomExpectHandler(bool value) {
+        httpContext->getSocketContextData()->usingCustomExpectHandler = value;
+        return std::move(*this);
+    }
+
 };
 
 typedef TemplatedApp<false> App;

packages/bun-uws/src/AsyncSocket.h

@@ -131,7 +131,7 @@ public:
         getLoopData()->setCorkedSocket(this, SSL);
     }
 
-    /* Returns wheter we are corked or not */
+    /* Returns whether we are corked */
     bool isCorked() {
         return getLoopData()->isCorkedWith(this);
     }
@@ -182,9 +182,9 @@ public:
     }
 
     /* Returns the user space backpressure. */
-    unsigned int getBufferedAmount() {
+    size_t getBufferedAmount() {
         /* We return the actual amount of bytes in backbuffer, including pendingRemoval */
-        return (unsigned int) getAsyncSocketData()->buffer.totalLength();
+        return getAsyncSocketData()->buffer.totalLength();
     }
 
     /* Returns the text representation of an IPv4 or IPv6 address */
@@ -222,6 +222,63 @@ public:
         return addressAsText(getRemoteAddress());
     }
 
+    /**
+    * Flushes the socket buffer by writing as much data as possible to the underlying socket.
+    * 
+    * @return The total number of bytes successfully written to the socket
+    */
+    size_t flush() {
+        /* Check if socket is valid for operations */
+        if (us_socket_is_closed(SSL, (us_socket_t *) this)) {
+            /* Socket is closed, no flushing is possible */
+            return 0;
+        }
+
+        /* Get the associated asynchronous socket data structure */
+        AsyncSocketData<SSL> *asyncSocketData = getAsyncSocketData();
+        size_t total_written = 0;
+        
+        /* Continue flushing as long as we have data in the buffer */
+        while (asyncSocketData->buffer.length()) {
+            /* Get current buffer size */
+            size_t buffer_len = asyncSocketData->buffer.length();
+            
+            /* Limit write size to INT_MAX as the underlying socket API uses int for length */
+            int max_flush_len = std::min(buffer_len, (size_t)INT_MAX);
+
+            /* Attempt to write data to the socket */
+            int written = us_socket_write(SSL, (us_socket_t *) this, asyncSocketData->buffer.data(), max_flush_len, 0);
+            total_written += written;
+            
+            /* Check if we couldn't write the entire buffer */
+            if ((unsigned int) written < buffer_len) {
+                /* Remove the successfully written data from the buffer */
+                asyncSocketData->buffer.erase((unsigned int) written);
+                
+                /* If we wrote less than we attempted, the socket buffer is likely full
+                * likely is used as an optimization hint to the compiler
+                * since written < buffer_len is very likely to be true
+                */
+                if(written < max_flush_len) {
+                     [[likely]]
+                    /* Cannot write more at this time, return what we've written so far */
+                    return total_written;
+                }
+                /* If we wrote exactly max_flush_len, we might be able to write more, so continue
+                 * This is unlikely to happen, because this would be INT_MAX bytes, which is unlikely to be written in one go
+                 * but we keep this check for completeness
+                 */
+                continue;
+            }
+
+            /* Successfully wrote the entire buffer, clear the buffer */
+            asyncSocketData->buffer.clear();
+        }
+
+        /* Return the total number of bytes written during this flush operation */
+        return total_written;
+    }
+
     /* Write in three levels of prioritization: cork-buffer, syscall, socket-buffer. Always drain if possible.
      * Returns pair of bytes written (anywhere) and wheter or not this call resulted in the polling for
      * writable (or we are in a state that implies polling for writable). */
@@ -233,7 +290,6 @@ public:
 
         LoopData *loopData = getLoopData();
         AsyncSocketData<SSL> *asyncSocketData = getAsyncSocketData();
-
         /* We are limited if we have a per-socket buffer */
         if (asyncSocketData->buffer.length()) {
             size_t buffer_len = asyncSocketData->buffer.length();
@@ -261,7 +317,7 @@ public:
             asyncSocketData->buffer.clear();
         }
 
-        if (length) {
+        if (length) {          
             if (loopData->isCorkedWith(this)) {
                 /* We are corked */
                 if (LoopData::CORK_BUFFER_SIZE - loopData->getCorkOffset() >= (unsigned int) length) {

packages/bun-uws/src/AsyncSocketData.h

@@ -81,7 +81,7 @@ struct AsyncSocketData {
 
     }
 
-    /* Or emppty */
+    /* Or empty */
     AsyncSocketData() = default;
 };
 

packages/bun-uws/src/HttpContext.h

@@ -43,10 +43,10 @@ private:
     HttpContext() = delete;
 
     /* Maximum delay allowed until an HTTP connection is terminated due to outstanding request or rejected data (slow loris protection) */
-    static const int HTTP_IDLE_TIMEOUT_S = 10;
+    static constexpr int HTTP_IDLE_TIMEOUT_S = 10;
 
     /* Minimum allowed receive throughput per second (clients uploading less than 16kB/sec get dropped) */
-    static const int HTTP_RECEIVE_THROUGHPUT_BYTES = 16 * 1024;
+    static constexpr int HTTP_RECEIVE_THROUGHPUT_BYTES = 16 * 1024;
 
     us_socket_context_t *getSocketContext() {
         return (us_socket_context_t *) this;
@@ -125,7 +125,7 @@ private:
             }
 
             /* Signal broken HTTP request only if we have a pending request */
-            if (httpResponseData->onAborted) {
+            if (httpResponseData->onAborted != nullptr && httpResponseData->userData != nullptr) {
                 httpResponseData->onAborted((HttpResponse<SSL> *)s, httpResponseData->userData);
             }
 
@@ -199,6 +199,8 @@ private:
                     httpResponseData->state |= HttpResponseData<SSL>::HTTP_CONNECTION_CLOSE;
                 }
 
+                httpResponseData->fromAncientRequest = httpRequest->isAncient();
+
                 /* Select the router based on SNI (only possible for SSL) */
                 auto *selectedRouter = &httpContextData->router;
                 if constexpr (SSL) {
@@ -233,7 +235,7 @@ private:
                 }
 
                 /* Returning from a request handler without responding or attaching an onAborted handler is ill-use */
-                if (!((HttpResponse<SSL> *) s)->hasResponded() && !httpResponseData->onAborted) {
+                if (!((HttpResponse<SSL> *) s)->hasResponded() && !httpResponseData->onAborted && !httpResponseData->socketData) {
                     /* Throw exception here? */
                     std::cerr << "Error: Returning from a request handler without responding or attaching an abort handler is forbidden!" << std::endl;
                     std::terminate();
@@ -360,18 +362,38 @@ private:
 
         /* Handle HTTP write out (note: SSL_read may trigger this spuriously, the app need to handle spurious calls) */
         us_socket_context_on_writable(SSL, getSocketContext(), [](us_socket_t *s) {
+            auto *asyncSocket = reinterpret_cast<AsyncSocket<SSL> *>(s);
+            auto *httpResponseData = reinterpret_cast<HttpResponseData<SSL> *>(asyncSocket->getAsyncSocketData());
 
-            AsyncSocket<SSL> *asyncSocket = (AsyncSocket<SSL> *) s;
-            HttpResponseData<SSL> *httpResponseData = (HttpResponseData<SSL> *) asyncSocket->getAsyncSocketData();
-
+            /* Attempt to drain the socket buffer before triggering onWritable callback */
+            size_t bufferedAmount = asyncSocket->getBufferedAmount();
+            if (bufferedAmount > 0) {
+                /* Try to flush pending data from the socket's buffer to the network */
+                bufferedAmount -= asyncSocket->flush();
+                
+                /* Check if there's still data waiting to be sent after flush attempt */
+                if (bufferedAmount > 0) {
+                    /* Socket buffer is not completely empty yet
+                    * - Reset the timeout to prevent premature connection closure
+                    * - This allows time for another writable event or new request
+                    * - Return the socket to indicate we're still processing
+                    */
+                    reinterpret_cast<HttpResponse<SSL> *>(s)->resetTimeout();
+                    return s;
+                }
+                /* If bufferedAmount is now 0, we've successfully flushed everything
+                * and will fall through to the next section of code
+                */
+            }
+            
             /* Ask the developer to write data and return success (true) or failure (false), OR skip sending anything and return success (true). */
             if (httpResponseData->onWritable) {
                 /* We are now writable, so hang timeout again, the user does not have to do anything so we should hang until end or tryEnd rearms timeout */
                 us_socket_timeout(SSL, s, 0);
-
+                
                 /* We expect the developer to return whether or not write was successful (true).
                  * If write was never called, the developer should still return true so that we may drain. */
-                bool success = httpResponseData->callOnWritable((HttpResponse<SSL> *)asyncSocket, httpResponseData->offset);
+                bool success = httpResponseData->callOnWritable(reinterpret_cast<HttpResponse<SSL> *>(asyncSocket), httpResponseData->offset);
 
                 /* The developer indicated that their onWritable failed. */
                 if (!success) {
@@ -383,7 +405,7 @@ private:
             }
 
             /* Drain any socket buffer, this might empty our backpressure and thus finish the request */
-            /*auto [written, failed] = */asyncSocket->write(nullptr, 0, true, 0);
+            asyncSocket->flush();
 
             /* Should we close this connection after a response - and is this response really done? */
             if (httpResponseData->state & HttpResponseData<SSL>::HTTP_CONNECTION_CLOSE) {
@@ -398,28 +420,26 @@ private:
             }
 
             /* Expect another writable event, or another request within the timeout */
-            ((HttpResponse<SSL> *) s)->resetTimeout();
+            reinterpret_cast<HttpResponse<SSL> *>(s)->resetTimeout();
 
             return s;
         });
 
         /* Handle FIN, HTTP does not support half-closed sockets, so simply close */
         us_socket_context_on_end(SSL, getSocketContext(), [](us_socket_t *s) {
-            ((AsyncSocket<SSL> *)s)->uncorkWithoutSending();
-
+            auto *asyncSocket = reinterpret_cast<AsyncSocket<SSL> *>(s);
+            asyncSocket->uncorkWithoutSending();
             /* We do not care for half closed sockets */
-            AsyncSocket<SSL> *asyncSocket = (AsyncSocket<SSL> *) s;
             return asyncSocket->close();
-
         });
 
         /* Handle socket timeouts, simply close them so to not confuse client with FIN */
         us_socket_context_on_timeout(SSL, getSocketContext(), [](us_socket_t *s) {
 
             /* Force close rather than gracefully shutdown and risk confusing the client with a complete download */
-            AsyncSocket<SSL> *asyncSocket = (AsyncSocket<SSL> *) s;
+            AsyncSocket<SSL> *asyncSocket = reinterpret_cast<AsyncSocket<SSL> *>(s);
             // Node.js by default closes the connection but they emit the timeout event before that
-            HttpResponseData<SSL> *httpResponseData = (HttpResponseData<SSL> *) asyncSocket->getAsyncSocketData();
+            HttpResponseData<SSL> *httpResponseData = reinterpret_cast<HttpResponseData<SSL> *>(asyncSocket->getAsyncSocketData());
 
             if (httpResponseData->onTimeout) {
                 httpResponseData->onTimeout((HttpResponse<SSL> *)s, httpResponseData->userData);
@@ -495,16 +515,20 @@ public:
             }
         }
 
-        httpContextData->currentRouter->add(methods, pattern, [handler = std::move(handler), parameterOffsets = std::move(parameterOffsets)](auto *r) mutable {
+        const bool &customContinue = httpContextData->usingCustomExpectHandler;
+
+        httpContextData->currentRouter->add(methods, pattern, [handler = std::move(handler), parameterOffsets = std::move(parameterOffsets), &customContinue](auto *r) mutable {
             auto user = r->getUserData();
             user.httpRequest->setYield(false);
             user.httpRequest->setParameters(r->getParameters());
             user.httpRequest->setParameterOffsets(&parameterOffsets);
 
-            /* Middleware? Automatically respond to expectations */
-            std::string_view expect = user.httpRequest->getHeader("expect");
-            if (expect.length() && expect == "100-continue") {
-                user.httpResponse->writeContinue();
+            if (!customContinue) {
+                /* Middleware? Automatically respond to expectations */
+                std::string_view expect = user.httpRequest->getHeader("expect");
+                if (expect.length() && expect == "100-continue") {
+                    user.httpResponse->writeContinue();
+                }
             }
 
             handler(user.httpResponse, user.httpRequest);

packages/bun-uws/src/HttpContextData.h

@@ -27,7 +27,6 @@ namespace uWS {
 template<bool> struct HttpResponse;
 struct HttpRequest;
 
-
 template <bool SSL>
 struct alignas(16) HttpContextData {
     template <bool> friend struct HttpContext;
@@ -52,6 +51,7 @@ private:
     void *upgradedWebSocket = nullptr;
     bool isParsingHttp = false;
     bool rejectUnauthorized = false;
+    bool usingCustomExpectHandler = false;
 
     /* Used to simulate Node.js socket events. */
     OnSocketClosedCallback onSocketClosed = nullptr;

packages/bun-uws/src/HttpResponse.h

@@ -118,19 +118,14 @@ public:
         }
 
         /* if write was called and there was previously no Content-Length header set */
-        if (httpResponseData->state & HttpResponseData<SSL>::HTTP_WRITE_CALLED && !(httpResponseData->state & HttpResponseData<SSL>::HTTP_WROTE_CONTENT_LENGTH_HEADER)) {
+        if (httpResponseData->state & HttpResponseData<SSL>::HTTP_WRITE_CALLED && !(httpResponseData->state & HttpResponseData<SSL>::HTTP_WROTE_CONTENT_LENGTH_HEADER) && !httpResponseData->fromAncientRequest) {
 
             /* We do not have tryWrite-like functionalities, so ignore optional in this path */
 
-            /* Do not allow sending 0 chunk here */
-            if (data.length()) {
-                Super::write("\r\n", 2);
-                writeUnsignedHex((unsigned int) data.length());
-                Super::write("\r\n", 2);
-
-                /* Ignoring optional for now */
-                Super::write(data.data(), (int) data.length());
-            }
+            
+            /* Write the chunked data if there is any (this will not send zero chunks) */
+            this->write(data, nullptr);
+            
 
             /* Terminating 0 chunk */
             Super::write("\r\n0\r\n\r\n", 7);
@@ -480,9 +475,43 @@ public:
             return true;
         }
 
+        size_t length = data.length();
+
+        // Special handling for extremely large data (greater than UINT_MAX bytes)
+        // most clients expect a max of UINT_MAX, so we need to split the write into multiple writes
+        if (length > UINT_MAX) {
+            bool has_failed = false;
+            size_t total_written = 0;
+            // Process full-sized chunks until remaining data is less than UINT_MAX
+            while (length > UINT_MAX) {
+                size_t written = 0;
+                // Write a UINT_MAX-sized chunk and check for failure
+                // even after failure we continue writing because the data will be buffered
+                if(!this->write(data.substr(0, UINT_MAX), &written)) {
+                    has_failed = true;
+                }
+                total_written += written;
+                length -= UINT_MAX;
+                data = data.substr(UINT_MAX);
+            }
+            // Handle the final chunk (less than UINT_MAX bytes)
+            if (length > 0) {
+                size_t written = 0;
+                if(!this->write(data, &written)) {
+                    has_failed = true;
+                }
+                total_written += written;
+            }
+            if (writtenPtr) {
+                *writtenPtr = total_written;
+            }
+            return !has_failed;
+        }
+        
+
         HttpResponseData<SSL> *httpResponseData = getHttpResponseData();
 
-        if (!(httpResponseData->state & HttpResponseData<SSL>::HTTP_WROTE_CONTENT_LENGTH_HEADER)) {
+        if (!(httpResponseData->state & HttpResponseData<SSL>::HTTP_WROTE_CONTENT_LENGTH_HEADER) && !httpResponseData->fromAncientRequest) {
             if (!(httpResponseData->state & HttpResponseData<SSL>::HTTP_WRITE_CALLED)) {
                 /* Write mark on first call to write */
                 writeMark();
@@ -499,17 +528,36 @@ public:
             Super::write("\r\n", 2);
             httpResponseData->state |= HttpResponseData<SSL>::HTTP_WRITE_CALLED;
         }
+        size_t total_written = 0;
+        bool has_failed = false;
 
-        auto [written, failed] = Super::write(data.data(), (int) data.length());
+        // Handle data larger than INT_MAX by writing it in chunks of INT_MAX bytes
+        while (length > INT_MAX) {
+            // Write the maximum allowed chunk size (INT_MAX)
+            auto [written, failed] = Super::write(data.data(), INT_MAX);
+            // If the write failed, set the has_failed flag we continue writting because the data will be buffered
+            has_failed = has_failed || failed;
+            total_written += written;
+            length -= INT_MAX;
+            data = data.substr(INT_MAX);
+        }
+        // Handle the remaining data (less than INT_MAX bytes)
+        if (length > 0) {
+            // Write the final chunk with exact remaining length
+            auto [written, failed] = Super::write(data.data(), (int) length);
+            has_failed = has_failed || failed;
+            total_written += written;
+        }
+        
         /* Reset timeout on each sended chunk */
         this->resetTimeout();
 
         if (writtenPtr) {
-            *writtenPtr = written;
+            *writtenPtr = total_written;
         }
 
         /* If we did not fail the write, accept more */
-        return !failed;
+        return !has_failed;
     }
 
     /* Get the current byte write offset for this Http response */
@@ -660,12 +708,6 @@ public:
         return httpResponseData->socketData;
     }
 
-    void setSocketData(void* socketData) {
-        HttpResponseData<SSL> *httpResponseData = getHttpResponseData();
-
-        httpResponseData->socketData = socketData;
-    }
-
     void setWriteOffset(uint64_t offset) {
         HttpResponseData<SSL> *httpResponseData = getHttpResponseData();
 

packages/bun-uws/src/HttpResponseData.h

@@ -36,7 +36,7 @@ struct HttpResponseData : AsyncSocketData<SSL>, HttpParser {
     using OnAbortedCallback = void (*)(uWS::HttpResponse<SSL>*, void*);
     using OnTimeoutCallback = void (*)(uWS::HttpResponse<SSL>*, void*);
     using OnDataCallback = void (*)(uWS::HttpResponse<SSL>* response, const char* chunk, size_t chunk_length, bool, void*);
-    
+
     /* When we are done with a response we mark it like so */
     void markDone() {
         onAborted = nullptr;
@@ -53,7 +53,7 @@ struct HttpResponseData : AsyncSocketData<SSL>, HttpParser {
     }
 
     /* Caller of onWritable. It is possible onWritable calls markDone so we need to borrow it. */
-    bool callOnWritable( uWS::HttpResponse<SSL>* response, uint64_t offset) {
+    bool callOnWritable(uWS::HttpResponse<SSL>* response, uint64_t offset) {
         /* Borrow real onWritable */
         auto* borrowedOnWritable = std::move(onWritable);
 
@@ -100,6 +100,7 @@ struct HttpResponseData : AsyncSocketData<SSL>, HttpParser {
     /* Current state (content-length sent, status sent, write called, etc */
     uint8_t state = 0;
     uint8_t idleTimeout = 10; // default HTTP_TIMEOUT 10 seconds
+    bool fromAncientRequest = false;
 
 #ifdef UWS_WITH_PROXY
     ProxyParser proxyParser;

packages/bun-uws/src/MoveOnlyFunction.h

@@ -82,7 +82,14 @@ namespace ofats {
 
 namespace any_detail {
 
-using buffer = std::aligned_storage_t<sizeof(void*) * 2, alignof(void*)>;
+template <std::size_t Len, std::size_t Align>
+class my_aligned_storage_t {
+private:
+    alignas(Align) std::byte t_buff[Len];
+};
+
+
+using buffer = my_aligned_storage_t<sizeof(void*) * 2, alignof(void*)>;
 
 template <class T>
 inline constexpr bool is_small_object_v =

packages/bun-uws/src/WebSocket.h

@@ -115,7 +115,7 @@ public:
             char header[10];
             int header_length = (int) protocol::formatMessage<isServer>(header, "", 0, opCode, message.length(), compress, fin);
             int written = us_socket_write2(0, (struct us_socket_t *)this, header, header_length, message.data(), (int) message.length());
-        
+
             if (written != header_length + (int) message.length()) {
                 /* Buffer up backpressure */
                 if (written > header_length) {
@@ -289,7 +289,7 @@ public:
         );
 
         WebSocketData *webSocketData = (WebSocketData *) us_socket_ext(SSL, (us_socket_t *) this);
-        
+
         if (!webSocketData->subscriber) { return false; }
 
         /* Cannot return numSubscribers as this is only for this particular websocket context */

packages/bun-uws/src/WebSocketContext.h

@@ -339,7 +339,7 @@ private:
 
             /* We store old backpressure since it is unclear whether write drained anything,
              * however, in case of coming here with 0 backpressure we still need to emit drain event */
-            unsigned int backpressure = asyncSocket->getBufferedAmount();
+            size_t backpressure = asyncSocket->getBufferedAmount();
 
             /* Drain as much as possible */
             asyncSocket->write(nullptr, 0);

packages/bun-uws/src/WebSocketContextData.h

@@ -82,7 +82,7 @@ public:
     std::pair<unsigned short, unsigned short> idleTimeoutComponents;
 
     /* This is run once on start-up */
-    void calculateIdleTimeoutCompnents(unsigned short idleTimeout) {
+    void calculateIdleTimeoutComponents(unsigned short idleTimeout) {
         unsigned short margin = 4;
         /* 4, 8 or 16 seconds margin based on idleTimeout */
         while ((int) idleTimeout - margin * 2 >= margin * 2 && margin < 16) {

scripts/bootstrap.ps1

@@ -345,7 +345,7 @@ function Install-Rust {
 function Install-Llvm {
   Install-Package llvm `
     -Command clang-cl `
-    -Version "18.1.8"
+    -Version "19.1.7"
   Add-To-Path "$env:ProgramFiles\LLVM\bin"
 }
 

scripts/bootstrap.sh

@@ -897,7 +897,7 @@ install_build_essentials() {
 }
 
 llvm_version_exact() {
-	print "18.1.8"
+	print "19.1.7"
 }
 
 llvm_version() {
@@ -915,11 +915,12 @@ install_llvm() {
 		install_packages "llvm@$(llvm_version)"
 		;;
 	apk)
+		# alpine doesn't have a lld19 package on 3.21 atm so use bare one for now
 		install_packages \
 			"llvm$(llvm_version)" \
 			"clang$(llvm_version)" \
 			"scudo-malloc" \
-			"lld$(llvm_version)"
+			"lld"
 		;;
 	esac
 }
@@ -963,7 +964,7 @@ install_gcc() {
 		;;
 	esac
 
-	llvm_v="18"
+	llvm_v="19"
 
 	append_to_profile "export CC=clang-${llvm_v}"
 	append_to_profile "export CXX=clang++-${llvm_v}"

scripts/build.mjs

@@ -2,8 +2,15 @@
 
 import { spawn as nodeSpawn } from "node:child_process";
 import { existsSync, readFileSync, mkdirSync, cpSync, chmodSync } from "node:fs";
-import { basename, join, resolve } from "node:path";
-import { isCI, printEnvironment, startGroup } from "./utils.mjs";
+import { basename, join, relative, resolve } from "node:path";
+import {
+  formatAnnotationToHtml,
+  isCI,
+  parseAnnotations,
+  printEnvironment,
+  reportAnnotationToBuildKite,
+  startGroup,
+} from "./utils.mjs";
 
 // https://cmake.org/cmake/help/latest/manual/cmake.1.html#generate-a-project-buildsystem
 const generateFlags = [
@@ -222,16 +229,24 @@ async function spawn(command, args, options, label) {
     timestamp = Date.now();
   });
 
+  let stdoutBuffer = "";
+
   let done;
   if (pipe) {
     const stdout = new Promise(resolve => {
       subprocess.stdout.on("end", resolve);
-      subprocess.stdout.on("data", data => process.stdout.write(data));
+      subprocess.stdout.on("data", data => {
+        stdoutBuffer += data.toString();
+        process.stdout.write(data);
+      });
     });
 
     const stderr = new Promise(resolve => {
       subprocess.stderr.on("end", resolve);
-      subprocess.stderr.on("data", data => process.stderr.write(data));
+      subprocess.stderr.on("data", data => {
+        stdoutBuffer += data.toString();
+        process.stderr.write(data);
+      });
     });
 
     done = Promise.all([stdout, stderr]);
@@ -252,9 +267,40 @@ async function spawn(command, args, options, label) {
     return;
   }
 
-  if (error) {
-    console.error(error);
-  } else if (signalCode) {
+  if (isBuildkite()) {
+    let annotated;
+    try {
+      const { annotations } = parseAnnotations(stdoutBuffer);
+      for (const annotation of annotations) {
+        const content = formatAnnotationToHtml(annotation);
+        reportAnnotationToBuildKite({
+          priority: 10,
+          label: annotation.title || annotation.filename,
+          content,
+        });
+        annotated = true;
+      }
+    } catch (error) {
+      console.error(`Failed to parse annotations:`, error);
+    }
+
+    if (!annotated) {
+      const content = formatAnnotationToHtml({
+        filename: relative(process.cwd(), import.meta.filename),
+        title: "build failed",
+        content: stdoutBuffer,
+        source: "build",
+        level: "error",
+      });
+      reportAnnotationToBuildKite({
+        priority: 10,
+        label: "build failed",
+        content,
+      });
+    }
+  }
+
+  if (signalCode) {
     console.error(`Command killed: ${signalCode}`);
   } else {
     console.error(`Command exited: code ${exitCode}`);

scripts/generate-perf-trace-events.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# This file is not run often, so we don't need to make it part of the build system.
+# We do this because the event names have to be compile-time constants.
+
+
+export TRACE_EVENTS=$(rg 'bun\.perf\.trace\("([^"]*)"\)' -t zig --json \
+    | jq -r 'select(.type == "match")' \
+    | jq -r '.data.submatches[].match.text' \
+    | cut -d'"' -f2 \
+    | sort \
+    | uniq)
+
+echo "// Generated with scripts/generate-perf-trace-events.sh" > src/bun.js/bindings/generated_perf_trace_events.h
+echo "// clang-format off" >> src/bun.js/bindings/generated_perf_trace_events.h
+echo "#define FOR_EACH_TRACE_EVENT(macro) \\" >> src/bun.js/bindings/generated_perf_trace_events.h
+i=0
+for event in $TRACE_EVENTS; do
+    echo "  macro($event, $((i++))) \\" >> src/bun.js/bindings/generated_perf_trace_events.h
+done
+echo "  // end" >> src/bun.js/bindings/generated_perf_trace_events.h
+
+echo "Generated src/bun.js/bindings/generated_perf_trace_events.h"
+
+echo "// Generated with scripts/generate-perf-trace-events.sh" > src/generated_perf_trace_events.zig
+echo "pub const PerfEvent = enum(i32) {" >> src/generated_perf_trace_events.zig
+for event in $TRACE_EVENTS; do
+    echo "    @\"$event\"," >> src/generated_perf_trace_events.zig
+done
+echo "};" >> src/generated_perf_trace_events.zig
+
+echo "Generated src/generated_perf_trace_events.zig"