BridgeJS: Module-qualify internal ABI names to fix cross-module type collisions

When two Swift modules in one BridgeJS build exported a `@JS` type with
the same name, the generated glue collided silently: duplicated
`@_expose(wasm, ...)` thunk names, duplicated
`swift_js_struct_lower_<name>`/`swift_js_struct_lift_<name>` hooks, and
colliding `structHelpers`/`enumHelpers` JS keys - last writer wins,
causing silent data corruption.

Fix by module-qualifying the internal ABI identity of exported Swift
types while keeping the public JS/TS surface flat:

- `BridgeType` payloads for exported Swift types are minted as
  `<Module>.<Nesting>.<Name>` (still a valid Swift call-site expression).
- Type `abiName`s are derived from the module-qualified `swiftCallName`
  (dots replaced with underscores), so the JS helper key derived from a
  payload always equals the defining type's `abiName` by construction.
- Top-level function thunk names gain the module name as namespace
  context; enum static contexts carry the qualified `swiftCallName`
  (sanitized inside `ABINameGenerator`).
- `mangleTypeName` sanitizes dots since mangled names are embedded in
  Swift identifiers.
- `ExternalModuleIndex` keeps indexing dependency types by their
  module-stripped dot path while carrying qualified payloads, so
  cross-module references resolve to the same ABI names.
- Public JS class names, exports keys, and TS declarations stay flat via
  the new `BridgeType.dropModulePrefix` display accessor.
- BridgeJSLink now fails with a clear diagnostic when two modules export
  the same public name at the same namespace path.

Fixes swiftwasm#785

Author: krodak

Benchmarks/Sources/Generated/BridgeJS.swift

@@ -8,13 +8,13 @@
 
 @_spi(BridgeJS) import JavaScriptKit
 
-extension PlayBridgeJSOutput: _BridgedSwiftStruct {
-    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJSOutput {
+extension PlayBridgeJS.PlayBridgeJSOutput: _BridgedSwiftStruct {
+    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJS.PlayBridgeJSOutput {
         let swiftGlue = String.bridgeJSStackPop()
         let importSwiftMacroDecls = String.bridgeJSStackPop()
         let outputDts = String.bridgeJSStackPop()
         let outputJs = String.bridgeJSStackPop()
-        return PlayBridgeJSOutput(outputJs: outputJs, outputDts: outputDts, importSwiftMacroDecls: importSwiftMacroDecls, swiftGlue: swiftGlue)
+        return PlayBridgeJS.PlayBridgeJSOutput(outputJs: outputJs, outputDts: outputDts, importSwiftMacroDecls: importSwiftMacroDecls, swiftGlue: swiftGlue)
     }
 
     @_spi(BridgeJS) @_transparent public consuming func bridgeJSStackPush() {
@@ -25,50 +25,50 @@ extension PlayBridgeJSOutput: _BridgedSwiftStruct {
     }
 
     init(unsafelyCopying jsObject: JSObject) {
-        _bjs_struct_lower_PlayBridgeJSOutput(jsObject.bridgeJSLowerParameter())
+        _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSOutput(jsObject.bridgeJSLowerParameter())
         self = Self.bridgeJSStackPop()
     }
 
     func toJSObject() -> JSObject {
         let __bjs_self = self
         __bjs_self.bridgeJSStackPush()
-        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJSOutput()))
+        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSOutput()))
     }
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJSOutput")
-fileprivate func _bjs_struct_lower_PlayBridgeJSOutput_extern(_ objectId: Int32) -> Void
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJS_PlayBridgeJSOutput")
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSOutput_extern(_ objectId: Int32) -> Void
 #else
-fileprivate func _bjs_struct_lower_PlayBridgeJSOutput_extern(_ objectId: Int32) -> Void {
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSOutput_extern(_ objectId: Int32) -> Void {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJSOutput(_ objectId: Int32) -> Void {
-    return _bjs_struct_lower_PlayBridgeJSOutput_extern(objectId)
+@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSOutput(_ objectId: Int32) -> Void {
+    return _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSOutput_extern(objectId)
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJSOutput")
-fileprivate func _bjs_struct_lift_PlayBridgeJSOutput_extern() -> Int32
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJS_PlayBridgeJSOutput")
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSOutput_extern() -> Int32
 #else
-fileprivate func _bjs_struct_lift_PlayBridgeJSOutput_extern() -> Int32 {
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSOutput_extern() -> Int32 {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJSOutput() -> Int32 {
-    return _bjs_struct_lift_PlayBridgeJSOutput_extern()
+@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSOutput() -> Int32 {
+    return _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSOutput_extern()
 }
 
-extension PlayBridgeJSDiagnostic: _BridgedSwiftStruct {
-    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJSDiagnostic {
+extension PlayBridgeJS.PlayBridgeJSDiagnostic: _BridgedSwiftStruct {
+    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJS.PlayBridgeJSDiagnostic {
         let endColumn = Int.bridgeJSStackPop()
         let endLine = Int.bridgeJSStackPop()
         let startColumn = Int.bridgeJSStackPop()
         let startLine = Int.bridgeJSStackPop()
         let message = String.bridgeJSStackPop()
         let file = String.bridgeJSStackPop()
-        return PlayBridgeJSDiagnostic(file: file, message: message, startLine: startLine, startColumn: startColumn, endLine: endLine, endColumn: endColumn)
+        return PlayBridgeJS.PlayBridgeJSDiagnostic(file: file, message: message, startLine: startLine, startColumn: startColumn, endLine: endLine, endColumn: endColumn)
     }
 
     @_spi(BridgeJS) @_transparent public consuming func bridgeJSStackPush() {
@@ -81,46 +81,46 @@ extension PlayBridgeJSDiagnostic: _BridgedSwiftStruct {
     }
 
     init(unsafelyCopying jsObject: JSObject) {
-        _bjs_struct_lower_PlayBridgeJSDiagnostic(jsObject.bridgeJSLowerParameter())
+        _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic(jsObject.bridgeJSLowerParameter())
         self = Self.bridgeJSStackPop()
     }
 
     func toJSObject() -> JSObject {
         let __bjs_self = self
         __bjs_self.bridgeJSStackPush()
-        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJSDiagnostic()))
+        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic()))
     }
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJSDiagnostic")
-fileprivate func _bjs_struct_lower_PlayBridgeJSDiagnostic_extern(_ objectId: Int32) -> Void
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic")
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic_extern(_ objectId: Int32) -> Void
 #else
-fileprivate func _bjs_struct_lower_PlayBridgeJSDiagnostic_extern(_ objectId: Int32) -> Void {
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic_extern(_ objectId: Int32) -> Void {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJSDiagnostic(_ objectId: Int32) -> Void {
-    return _bjs_struct_lower_PlayBridgeJSDiagnostic_extern(objectId)
+@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic(_ objectId: Int32) -> Void {
+    return _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSDiagnostic_extern(objectId)
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJSDiagnostic")
-fileprivate func _bjs_struct_lift_PlayBridgeJSDiagnostic_extern() -> Int32
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic")
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic_extern() -> Int32
 #else
-fileprivate func _bjs_struct_lift_PlayBridgeJSDiagnostic_extern() -> Int32 {
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic_extern() -> Int32 {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJSDiagnostic() -> Int32 {
-    return _bjs_struct_lift_PlayBridgeJSDiagnostic_extern()
+@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic() -> Int32 {
+    return _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSDiagnostic_extern()
 }
 
-extension PlayBridgeJSResult: _BridgedSwiftStruct {
-    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJSResult {
-        let diagnostics = [PlayBridgeJSDiagnostic].bridgeJSStackPop()
-        let output = Optional<PlayBridgeJSOutput>.bridgeJSStackPop()
-        return PlayBridgeJSResult(output: output, diagnostics: diagnostics)
+extension PlayBridgeJS.PlayBridgeJSResult: _BridgedSwiftStruct {
+    @_spi(BridgeJS) @_transparent public static func bridgeJSStackPop() -> PlayBridgeJS.PlayBridgeJSResult {
+        let diagnostics = [PlayBridgeJS.PlayBridgeJSDiagnostic].bridgeJSStackPop()
+        let output = Optional<PlayBridgeJS.PlayBridgeJSOutput>.bridgeJSStackPop()
+        return PlayBridgeJS.PlayBridgeJSResult(output: output, diagnostics: diagnostics)
     }
 
     @_spi(BridgeJS) @_transparent public consuming func bridgeJSStackPush() {
@@ -129,58 +129,58 @@ extension PlayBridgeJSResult: _BridgedSwiftStruct {
     }
 
     init(unsafelyCopying jsObject: JSObject) {
-        _bjs_struct_lower_PlayBridgeJSResult(jsObject.bridgeJSLowerParameter())
+        _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSResult(jsObject.bridgeJSLowerParameter())
         self = Self.bridgeJSStackPop()
     }
 
     func toJSObject() -> JSObject {
         let __bjs_self = self
         __bjs_self.bridgeJSStackPush()
-        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJSResult()))
+        return JSObject(id: UInt32(bitPattern: _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSResult()))
     }
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJSResult")
-fileprivate func _bjs_struct_lower_PlayBridgeJSResult_extern(_ objectId: Int32) -> Void
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lower_PlayBridgeJS_PlayBridgeJSResult")
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSResult_extern(_ objectId: Int32) -> Void
 #else
-fileprivate func _bjs_struct_lower_PlayBridgeJSResult_extern(_ objectId: Int32) -> Void {
+fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSResult_extern(_ objectId: Int32) -> Void {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJSResult(_ objectId: Int32) -> Void {
-    return _bjs_struct_lower_PlayBridgeJSResult_extern(objectId)
+@inline(never) fileprivate func _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSResult(_ objectId: Int32) -> Void {
+    return _bjs_struct_lower_PlayBridgeJS_PlayBridgeJSResult_extern(objectId)
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJSResult")
-fileprivate func _bjs_struct_lift_PlayBridgeJSResult_extern() -> Int32
+@_extern(wasm, module: "bjs", name: "swift_js_struct_lift_PlayBridgeJS_PlayBridgeJSResult")
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSResult_extern() -> Int32
 #else
-fileprivate func _bjs_struct_lift_PlayBridgeJSResult_extern() -> Int32 {
+fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSResult_extern() -> Int32 {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJSResult() -> Int32 {
-    return _bjs_struct_lift_PlayBridgeJSResult_extern()
+@inline(never) fileprivate func _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSResult() -> Int32 {
+    return _bjs_struct_lift_PlayBridgeJS_PlayBridgeJSResult_extern()
 }
 
-@_expose(wasm, "bjs_PlayBridgeJS_init")
-@_cdecl("bjs_PlayBridgeJS_init")
-public func _bjs_PlayBridgeJS_init() -> UnsafeMutableRawPointer {
+@_expose(wasm, "bjs_PlayBridgeJS_PlayBridgeJS_init")
+@_cdecl("bjs_PlayBridgeJS_PlayBridgeJS_init")
+public func _bjs_PlayBridgeJS_PlayBridgeJS_init() -> UnsafeMutableRawPointer {
     #if arch(wasm32)
-    let ret = PlayBridgeJS()
+    let ret = PlayBridgeJS.PlayBridgeJS()
     return ret.bridgeJSLowerReturn()
     #else
     fatalError("Only available on WebAssembly")
     #endif
 }
 
-@_expose(wasm, "bjs_PlayBridgeJS_updateDetailed")
-@_cdecl("bjs_PlayBridgeJS_updateDetailed")
-public func _bjs_PlayBridgeJS_updateDetailed(_ _self: UnsafeMutableRawPointer, _ swiftSourceBytes: Int32, _ swiftSourceLength: Int32, _ dtsSourceBytes: Int32, _ dtsSourceLength: Int32) -> Void {
+@_expose(wasm, "bjs_PlayBridgeJS_PlayBridgeJS_updateDetailed")
+@_cdecl("bjs_PlayBridgeJS_PlayBridgeJS_updateDetailed")
+public func _bjs_PlayBridgeJS_PlayBridgeJS_updateDetailed(_ _self: UnsafeMutableRawPointer, _ swiftSourceBytes: Int32, _ swiftSourceLength: Int32, _ dtsSourceBytes: Int32, _ dtsSourceLength: Int32) -> Void {
     #if arch(wasm32)
     do {
-        let ret = try PlayBridgeJS.bridgeJSLiftParameter(_self).updateDetailed(swiftSource: String.bridgeJSLiftParameter(swiftSourceBytes, swiftSourceLength), dtsSource: String.bridgeJSLiftParameter(dtsSourceBytes, dtsSourceLength))
+        let ret = try PlayBridgeJS.PlayBridgeJS.bridgeJSLiftParameter(_self).updateDetailed(swiftSource: String.bridgeJSLiftParameter(swiftSourceBytes, swiftSourceLength), dtsSource: String.bridgeJSLiftParameter(dtsSourceBytes, dtsSourceLength))
         return ret.bridgeJSLowerReturn()
     } catch let error {
         if let error = error.thrownValue.object {
@@ -200,35 +200,35 @@ public func _bjs_PlayBridgeJS_updateDetailed(_ _self: UnsafeMutableRawPointer, _
     #endif
 }
 
-@_expose(wasm, "bjs_PlayBridgeJS_deinit")
-@_cdecl("bjs_PlayBridgeJS_deinit")
-public func _bjs_PlayBridgeJS_deinit(_ pointer: UnsafeMutableRawPointer) -> Void {
+@_expose(wasm, "bjs_PlayBridgeJS_PlayBridgeJS_deinit")
+@_cdecl("bjs_PlayBridgeJS_PlayBridgeJS_deinit")
+public func _bjs_PlayBridgeJS_PlayBridgeJS_deinit(_ pointer: UnsafeMutableRawPointer) -> Void {
     #if arch(wasm32)
-    Unmanaged<PlayBridgeJS>.fromOpaque(pointer).release()
+    Unmanaged<PlayBridgeJS.PlayBridgeJS>.fromOpaque(pointer).release()
     #else
     fatalError("Only available on WebAssembly")
     #endif
 }
 
-extension PlayBridgeJS: ConvertibleToJSValue, _BridgedSwiftHeapObject, _BridgedSwiftProtocolExportable {
+extension PlayBridgeJS.PlayBridgeJS: ConvertibleToJSValue, _BridgedSwiftHeapObject, _BridgedSwiftProtocolExportable {
     var jsValue: JSValue {
-        return .object(JSObject(id: UInt32(bitPattern: _bjs_PlayBridgeJS_wrap(Unmanaged.passRetained(self).toOpaque()))))
+        return .object(JSObject(id: UInt32(bitPattern: _bjs_PlayBridgeJS_PlayBridgeJS_wrap(Unmanaged.passRetained(self).toOpaque()))))
     }
     consuming func bridgeJSLowerAsProtocolReturn() -> Int32 {
-        _bjs_PlayBridgeJS_wrap(Unmanaged.passRetained(self).toOpaque())
+        _bjs_PlayBridgeJS_PlayBridgeJS_wrap(Unmanaged.passRetained(self).toOpaque())
     }
 }
 
 #if arch(wasm32)
-@_extern(wasm, module: "PlayBridgeJS", name: "bjs_PlayBridgeJS_wrap")
-fileprivate func _bjs_PlayBridgeJS_wrap_extern(_ pointer: UnsafeMutableRawPointer) -> Int32
+@_extern(wasm, module: "PlayBridgeJS", name: "bjs_PlayBridgeJS_PlayBridgeJS_wrap")
+fileprivate func _bjs_PlayBridgeJS_PlayBridgeJS_wrap_extern(_ pointer: UnsafeMutableRawPointer) -> Int32
 #else
-fileprivate func _bjs_PlayBridgeJS_wrap_extern(_ pointer: UnsafeMutableRawPointer) -> Int32 {
+fileprivate func _bjs_PlayBridgeJS_PlayBridgeJS_wrap_extern(_ pointer: UnsafeMutableRawPointer) -> Int32 {
     fatalError("Only available on WebAssembly")
 }
 #endif
-@inline(never) fileprivate func _bjs_PlayBridgeJS_wrap(_ pointer: UnsafeMutableRawPointer) -> Int32 {
-    return _bjs_PlayBridgeJS_wrap_extern(pointer)
+@inline(never) fileprivate func _bjs_PlayBridgeJS_PlayBridgeJS_wrap(_ pointer: UnsafeMutableRawPointer) -> Int32 {
+    return _bjs_PlayBridgeJS_PlayBridgeJS_wrap_extern(pointer)
 }
 
 #if arch(wasm32)

Benchmarks/Sources/Generated/JavaScript/BridgeJS.json

@@ -6,7 +6,7 @@
     "classes" : [
       {
         "constructor" : {
-          "abiName" : "bjs_PlayBridgeJS_init",
+          "abiName" : "bjs_PlayBridgeJS_PlayBridgeJS_init",
           "effects" : {
             "isAsync" : false,
             "isStatic" : false,
@@ -18,7 +18,7 @@
         },
         "methods" : [
           {
-            "abiName" : "bjs_PlayBridgeJS_updateDetailed",
+            "abiName" : "bjs_PlayBridgeJS_PlayBridgeJS_updateDetailed",
             "documentation" : "Structured entry point used by the playground so JS doesn't need to parse diagnostics.",
             "effects" : {
               "isAsync" : false,
@@ -48,7 +48,7 @@
             ],
             "returnType" : {
               "swiftStruct" : {
-                "_0" : "PlayBridgeJSResult"
+                "_0" : "PlayBridgeJS.PlayBridgeJSResult"
               }
             }
           }
@@ -57,7 +57,7 @@
         "properties" : [
 
         ],
-        "swiftCallName" : "PlayBridgeJS"
+        "swiftCallName" : "PlayBridgeJS.PlayBridgeJS"
       }
     ],
     "enums" : [
@@ -118,7 +118,7 @@
             }
           }
         ],
-        "swiftCallName" : "PlayBridgeJSOutput"
+        "swiftCallName" : "PlayBridgeJS.PlayBridgeJSOutput"
       },
       {
         "methods" : [
@@ -199,7 +199,7 @@
             }
           }
         ],
-        "swiftCallName" : "PlayBridgeJSDiagnostic"
+        "swiftCallName" : "PlayBridgeJS.PlayBridgeJSDiagnostic"
       },
       {
         "methods" : [
@@ -215,7 +215,7 @@
               "nullable" : {
                 "_0" : {
                   "swiftStruct" : {
-                    "_0" : "PlayBridgeJSOutput"
+                    "_0" : "PlayBridgeJS.PlayBridgeJSOutput"
                   }
                 },
                 "_1" : "null"
@@ -230,14 +230,14 @@
               "array" : {
                 "_0" : {
                   "swiftStruct" : {
-                    "_0" : "PlayBridgeJSDiagnostic"
+                    "_0" : "PlayBridgeJS.PlayBridgeJSDiagnostic"
                   }
                 }
               }
             }
           }
         ],
-        "swiftCallName" : "PlayBridgeJSResult"
+        "swiftCallName" : "PlayBridgeJS.PlayBridgeJSResult"
       }
     ]
   },

Examples/PlayBridgeJS/Sources/PlayBridgeJS/Generated/BridgeJS.swift

@@ -789,7 +789,7 @@ public class ExportSwift {
                 try renderSingleExportedConstructor(
                     constructor: constructor,
                     callName: klass.swiftCallName,
-                    returnType: .swiftHeapObject(klass.name)
+                    returnType: .swiftHeapObject(klass.swiftCallName)
                 )
             )
         }
@@ -1614,7 +1614,11 @@ extension BridgeType {
         case .jsObject(let name?): return name
         case .swiftHeapObject(let name): return name
         case .unsafePointer(let ptr): return ptr.swiftType
-        case .swiftProtocol(let name): return "Any\(name)"
+        case .swiftProtocol(let name):
+            // The `Any<Proto>` wrapper struct is declared with the bare protocol name in
+            // the defining module's glue, so strip any module/namespace qualification.
+            let bareName = name.split(separator: ".").last.map(String.init) ?? name
+            return "Any\(bareName)"
         case .void: return "Void"
         case .nullable(let wrappedType, let kind):
             return kind == .null ? "Optional<\(wrappedType.swiftType)>" : "JSUndefinedOr<\(wrappedType.swiftType)>"