diff --git a/Frameworks/RSCore/RSCore.xcodeproj/project.pbxproj b/Frameworks/RSCore/RSCore.xcodeproj/project.pbxproj
index 50196193d..4302ff351 100755
--- a/Frameworks/RSCore/RSCore.xcodeproj/project.pbxproj
+++ b/Frameworks/RSCore/RSCore.xcodeproj/project.pbxproj
@@ -135,6 +135,7 @@
 		84CFF56A1AC3D1B000CEA6C8 /* RSScaling.m in Sources */ = {isa = PBXBuildFile; fileRef = 84CFF5681AC3D1B000CEA6C8 /* RSScaling.m */; };
 		84CFF56D1AC3D20A00CEA6C8 /* NSImage+RSCore.h in Headers */ = {isa = PBXBuildFile; fileRef = 84CFF56B1AC3D20A00CEA6C8 /* NSImage+RSCore.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84CFF56E1AC3D20A00CEA6C8 /* NSImage+RSCore.m in Sources */ = {isa = PBXBuildFile; fileRef = 84CFF56C1AC3D20A00CEA6C8 /* NSImage+RSCore.m */; };
+		84E34DA61F9FA1070077082F /* UndoableCommand.swift in Sources */ = {isa = PBXBuildFile; fileRef = 84E34DA51F9FA1070077082F /* UndoableCommand.swift */; };
 		84F20F831F16BA6200D8E682 /* PropertyList.swift in Sources */ = {isa = PBXBuildFile; fileRef = 84F20F821F16BA6200D8E682 /* PropertyList.swift */; };
 		84FE9FC31C00453900081CE9 /* NSStoryboard+RSCore.h in Headers */ = {isa = PBXBuildFile; fileRef = 84FE9FC11C00453900081CE9 /* NSStoryboard+RSCore.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84FE9FC41C00453900081CE9 /* NSStoryboard+RSCore.m in Sources */ = {isa = PBXBuildFile; fileRef = 84FE9FC21C00453900081CE9 /* NSStoryboard+RSCore.m */; };
@@ -235,6 +236,7 @@
 		84CFF5681AC3D1B000CEA6C8 /* RSScaling.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RSScaling.m; sourceTree = "<group>"; };
 		84CFF56B1AC3D20A00CEA6C8 /* NSImage+RSCore.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSImage+RSCore.h"; sourceTree = "<group>"; };
 		84CFF56C1AC3D20A00CEA6C8 /* NSImage+RSCore.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSImage+RSCore.m"; sourceTree = "<group>"; };
+		84E34DA51F9FA1070077082F /* UndoableCommand.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; name = UndoableCommand.swift; path = RSCore/UndoableCommand.swift; sourceTree = "<group>"; };
 		84F20F821F16BA6200D8E682 /* PropertyList.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PropertyList.swift; sourceTree = "<group>"; };
 		84FE9FC11C00453900081CE9 /* NSStoryboard+RSCore.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSStoryboard+RSCore.h"; sourceTree = "<group>"; };
 		84FE9FC21C00453900081CE9 /* NSStoryboard+RSCore.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSStoryboard+RSCore.m"; sourceTree = "<group>"; };
@@ -307,6 +309,7 @@
 				849BF8B91C9130150071D1DA /* DiskSaver.swift */,
 				84A835891D4EC7B80004C598 /* PlistProviderProtocol.swift */,
 				842E45CB1ED623C7000A8B52 /* UniqueIdentifier.swift */,
+				84E34DA51F9FA1070077082F /* UndoableCommand.swift */,
 				84CFF5241AC3C8A200CEA6C8 /* Foundation */,
 				84CFF5551AC3CF4A00CEA6C8 /* AppKit */,
 				84CFF5661AC3D13F00CEA6C8 /* Images */,
@@ -703,6 +706,7 @@
 				844C915C1B65753E0051FC1B /* RSPlist.m in Sources */,
 				84CFF5231AC3C89D00CEA6C8 /* NSObject+RSCore.m in Sources */,
 				8414CBA71C95F2EA00333C12 /* Set+Extensions.swift in Sources */,
+				84E34DA61F9FA1070077082F /* UndoableCommand.swift in Sources */,
 				844F91D61D90D86100820C48 /* RSTransparentContainerView.m in Sources */,
 				84CFF56E1AC3D20A00CEA6C8 /* NSImage+RSCore.m in Sources */,
 				8453F7DF1BDF337800B1C8ED /* RSMacroProcessor.m in Sources */,
diff --git a/Frameworks/RSCore/RSCore/UndoableCommand.swift b/Frameworks/RSCore/RSCore/UndoableCommand.swift
new file mode 100644
index 000000000..624d0952c
--- /dev/null
+++ b/Frameworks/RSCore/RSCore/UndoableCommand.swift
@@ -0,0 +1,19 @@
+//
+//  UndoableCommand.swift
+//  RSCore
+//
+//  Created by Brent Simmons on 10/24/17.
+//  Copyright © 2017 Ranchero Software, LLC. All rights reserved.
+//
+
+import Foundation
+
+public protocol UndoableCommand: class {
+
+	var undoActionName: String { get }
+	var redoActionName: String { get }
+
+	func perform()
+	func undo()
+	func redo()
+}
diff --git a/ToDo.opml b/ToDo.opml
index 16a5a0717..37adf07ee 100644
--- a/ToDo.opml
+++ b/ToDo.opml
@@ -6,15 +6,18 @@
     </editor> -->
     <title>ToDo</title>
     <dateCreated>Tue, 12 Sep 2017 20:15:17 GMT</dateCreated>
-    <expansionState>0,10,12,17,20,21,24,28,34,36,39,43,45,60,65,78,79</expansionState>
+    <expansionState>0,13,15,20,23,24,27,31,37,39,42,46,48,63,68,81,82</expansionState>
     <vertScrollState>0</vertScrollState>
-    <windowTop>3153</windowTop>
-    <windowLeft>549</windowLeft>
-    <windowRight>1281</windowRight>
-    <windowBottom>3912</windowBottom>
+    <windowTop>658</windowTop>
+    <windowLeft>49</windowLeft>
+    <windowRight>781</windowRight>
+    <windowBottom>1417</windowBottom>
   </head>
   <body>
     <outline text="App">
+      <outline text="Undo mark all as read"/>
+      <outline text="Undo mark as read"/>
+      <outline text=""/>
       <outline text="Delete feed from sidebar - with undo support"/>
       <outline text="Delete folder from sidebar - with undo support"/>
       <outline text="Delete multiple selection from sidebar - with undo support"/>