Sendable.

Sources/Packages/Sources/SecretAgentKit/Agent.swift

@@ -35,7 +35,7 @@ extension Agent {
     ///   - writer: A ``FileHandleWriter`` to write the response to.
     /// - Return value: 
     ///   - Boolean if data could be read
-    @discardableResult public func handle(reader: FileHandleReader, writer: FileHandleWriter) async -> Bool {
+    @discardableResult @Sendable public func handle(reader: FileHandleReader, writer: FileHandleWriter) async -> Bool {
         logger.debug("Agent handling new data")
         let data = Data(reader.availableData)
         guard data.count > 4 else { return false}

Sources/Packages/Sources/SecretAgentKit/FileHandleProtocols.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 /// Protocol abstraction of the reading aspects of FileHandle.
-public protocol FileHandleReader {
+public protocol FileHandleReader: Sendable {
 
     /// Gets data that is available for reading.
     var availableData: Data { get }
@@ -13,7 +13,7 @@ public protocol FileHandleReader {
 }
 
 /// Protocol abstraction of the writing aspects of FileHandle.
-public protocol FileHandleWriter {
+public protocol FileHandleWriter: Sendable {
 
     /// Writes data to the handle.
     func write(_ data: Data)