diff --git a/src/private-frameworks/AssertionServices/CMakeLists.txt b/src/private-frameworks/AssertionServices/CMakeLists.txt
new file mode 100644
index 000000000..afefc03a1
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/CMakeLists.txt
@@ -0,0 +1,29 @@
+project(AssertionServices)
+
+set(DYLIB_COMPAT_VERSION "1.0.0")
+set(DYLIB_CURRENT_VERSION "223.140.2")
+
+add_framework(AssertionServices
+    FAT
+    CURRENT_VERSION
+    PRIVATE
+    VERSION "A"
+
+    SOURCES
+        src/AssertionServices.m
+        src/BKSWorkspace.m
+        src/BKSAssertion.m
+        src/BKSProcessExitContext.m
+        src/BKSProcess.m
+        src/BKSTerminationContext.m
+        src/BKSProcessAssertion.m
+        src/BKSTerminationAssertionObserverManager.m
+        src/BKSTerminationAssertion.m
+        src/BKSApplicationStateMonitor.m
+        src/BKSLaunchdJobSpecification.m
+
+    DEPENDENCIES
+        system
+        objc
+        Foundation
+)
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/AssertionServices.h b/src/private-frameworks/AssertionServices/include/AssertionServices/AssertionServices.h
new file mode 100644
index 000000000..4ec2d0ab0
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/AssertionServices.h
@@ -0,0 +1,60 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef _AssertionServices_H_
+#define _AssertionServices_H_
+
+#import <Foundation/Foundation.h>
+
+#import <AssertionServices/BSDescriptionProviding.h>
+#import <AssertionServices/BSXPCCoding.h>
+#import <AssertionServices/RBSAssertionObserving.h>
+#import <AssertionServices/RBSServiceDelegate.h>
+#import <AssertionServices/BKSWorkspace.h>
+#import <AssertionServices/BKSAssertion.h>
+#import <AssertionServices/BKSProcessExitContext.h>
+#import <AssertionServices/BKSProcess.h>
+#import <AssertionServices/BKSTerminationContext.h>
+#import <AssertionServices/BKSProcessAssertion.h>
+#import <AssertionServices/BKSTerminationAssertionObserverManager.h>
+#import <AssertionServices/BKSTerminationAssertion.h>
+#import <AssertionServices/BKSApplicationStateMonitor.h>
+#import <AssertionServices/BKSLaunchdJobSpecification.h>
+
+void* BKSAssertionErrorDescription(void);
+void* BKSProcessAssertionBackgroundTimeRemaining(void);
+void* BKSProcessAssertionSetExpirationHandler(void);
+void* BKSProcessDiagnosticReportTypeDescription(void);
+void* BKSProcessVisibilityIsForeground(void);
+void* BKSProcessVisibilityMax(void);
+void* BKSTerminationAssertionActiveEfficacyForBundleIdentifier(void);
+void* BKSTerminationAssertionEfficacyDescription(void);
+void* BKSTerminationAssertionHeldForBundleIdentifier(void);
+void* BKSTerminationAssertionRegisterObserver(void);
+void* BKSTerminationAssertionUnregisterObserver(void);
+void* BKSWatchdogAssertionCreateForPID(void);
+void* BKSWatchdogAssertionGetTypeID(void);
+void* NSStringFromBKSProcessErrorCode(void);
+void* NSStringFromBKSProcessExitReason(void);
+void* NSStringFromBKSProcessTaskState(void);
+void* NSStringFromBKSProcessVisibility(void);
+void* RBSProcessLegacyStateDescriptor(void);
+
+#endif
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSApplicationStateMonitor.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSApplicationStateMonitor.h
new file mode 100644
index 000000000..d0c332b4c
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSApplicationStateMonitor.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSApplicationStateMonitor : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSAssertion.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSAssertion.h
new file mode 100644
index 000000000..82477dbc2
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSAssertion.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSAssertion : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSLaunchdJobSpecification.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSLaunchdJobSpecification.h
new file mode 100644
index 000000000..aee7588da
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSLaunchdJobSpecification.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSLaunchdJobSpecification : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcess.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcess.h
new file mode 100644
index 000000000..c4a619a71
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcess.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSProcess : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessAssertion.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessAssertion.h
new file mode 100644
index 000000000..b1f7e0135
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessAssertion.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSProcessAssertion : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessExitContext.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessExitContext.h
new file mode 100644
index 000000000..7d2aaf68d
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSProcessExitContext.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSProcessExitContext : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertion.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertion.h
new file mode 100644
index 000000000..d17bd14a3
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertion.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSTerminationAssertion : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertionObserverManager.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertionObserverManager.h
new file mode 100644
index 000000000..0c472c95b
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationAssertionObserverManager.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSTerminationAssertionObserverManager : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationContext.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationContext.h
new file mode 100644
index 000000000..66a42dec7
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSTerminationContext.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSTerminationContext : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BKSWorkspace.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSWorkspace.h
new file mode 100644
index 000000000..62bf7949b
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BKSWorkspace.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@interface BKSWorkspace : NSObject
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BSDescriptionProviding.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BSDescriptionProviding.h
new file mode 100644
index 000000000..5d340cc14
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BSDescriptionProviding.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@protocol BSDescriptionProviding
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/BSXPCCoding.h b/src/private-frameworks/AssertionServices/include/AssertionServices/BSXPCCoding.h
new file mode 100644
index 000000000..45f13464d
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/BSXPCCoding.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@protocol BSXPCCoding
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/RBSAssertionObserving.h b/src/private-frameworks/AssertionServices/include/AssertionServices/RBSAssertionObserving.h
new file mode 100644
index 000000000..43e019884
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/RBSAssertionObserving.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@protocol RBSAssertionObserving
+
+@end
diff --git a/src/private-frameworks/AssertionServices/include/AssertionServices/RBSServiceDelegate.h b/src/private-frameworks/AssertionServices/include/AssertionServices/RBSServiceDelegate.h
new file mode 100644
index 000000000..c4a69a995
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/include/AssertionServices/RBSServiceDelegate.h
@@ -0,0 +1,24 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Foundation/Foundation.h>
+
+@protocol RBSServiceDelegate
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/AssertionServices.m b/src/private-frameworks/AssertionServices/src/AssertionServices.m
new file mode 100644
index 000000000..8085d3e2b
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/AssertionServices.m
@@ -0,0 +1,138 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#include <AssertionServices/AssertionServices.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+static int verbose = 0;
+
+__attribute__((constructor))
+static void initme(void) {
+    verbose = getenv("STUB_VERBOSE") != NULL;
+}
+
+void* BKSAssertionErrorDescription(void)
+{
+    if (verbose) puts("STUB: BKSAssertionErrorDescription called");
+    return NULL;
+}
+
+void* BKSProcessAssertionBackgroundTimeRemaining(void)
+{
+    if (verbose) puts("STUB: BKSProcessAssertionBackgroundTimeRemaining called");
+    return NULL;
+}
+
+void* BKSProcessAssertionSetExpirationHandler(void)
+{
+    if (verbose) puts("STUB: BKSProcessAssertionSetExpirationHandler called");
+    return NULL;
+}
+
+void* BKSProcessDiagnosticReportTypeDescription(void)
+{
+    if (verbose) puts("STUB: BKSProcessDiagnosticReportTypeDescription called");
+    return NULL;
+}
+
+void* BKSProcessVisibilityIsForeground(void)
+{
+    if (verbose) puts("STUB: BKSProcessVisibilityIsForeground called");
+    return NULL;
+}
+
+void* BKSProcessVisibilityMax(void)
+{
+    if (verbose) puts("STUB: BKSProcessVisibilityMax called");
+    return NULL;
+}
+
+void* BKSTerminationAssertionActiveEfficacyForBundleIdentifier(void)
+{
+    if (verbose) puts("STUB: BKSTerminationAssertionActiveEfficacyForBundleIdentifier called");
+    return NULL;
+}
+
+void* BKSTerminationAssertionEfficacyDescription(void)
+{
+    if (verbose) puts("STUB: BKSTerminationAssertionEfficacyDescription called");
+    return NULL;
+}
+
+void* BKSTerminationAssertionHeldForBundleIdentifier(void)
+{
+    if (verbose) puts("STUB: BKSTerminationAssertionHeldForBundleIdentifier called");
+    return NULL;
+}
+
+void* BKSTerminationAssertionRegisterObserver(void)
+{
+    if (verbose) puts("STUB: BKSTerminationAssertionRegisterObserver called");
+    return NULL;
+}
+
+void* BKSTerminationAssertionUnregisterObserver(void)
+{
+    if (verbose) puts("STUB: BKSTerminationAssertionUnregisterObserver called");
+    return NULL;
+}
+
+void* BKSWatchdogAssertionCreateForPID(void)
+{
+    if (verbose) puts("STUB: BKSWatchdogAssertionCreateForPID called");
+    return NULL;
+}
+
+void* BKSWatchdogAssertionGetTypeID(void)
+{
+    if (verbose) puts("STUB: BKSWatchdogAssertionGetTypeID called");
+    return NULL;
+}
+
+void* NSStringFromBKSProcessErrorCode(void)
+{
+    if (verbose) puts("STUB: NSStringFromBKSProcessErrorCode called");
+    return NULL;
+}
+
+void* NSStringFromBKSProcessExitReason(void)
+{
+    if (verbose) puts("STUB: NSStringFromBKSProcessExitReason called");
+    return NULL;
+}
+
+void* NSStringFromBKSProcessTaskState(void)
+{
+    if (verbose) puts("STUB: NSStringFromBKSProcessTaskState called");
+    return NULL;
+}
+
+void* NSStringFromBKSProcessVisibility(void)
+{
+    if (verbose) puts("STUB: NSStringFromBKSProcessVisibility called");
+    return NULL;
+}
+
+void* RBSProcessLegacyStateDescriptor(void)
+{
+    if (verbose) puts("STUB: RBSProcessLegacyStateDescriptor called");
+    return NULL;
+}
diff --git a/src/private-frameworks/AssertionServices/src/BKSApplicationStateMonitor.m b/src/private-frameworks/AssertionServices/src/BKSApplicationStateMonitor.m
new file mode 100644
index 000000000..1f1114659
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSApplicationStateMonitor.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSApplicationStateMonitor.h>
+
+@implementation BKSApplicationStateMonitor
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSAssertion.m b/src/private-frameworks/AssertionServices/src/BKSAssertion.m
new file mode 100644
index 000000000..982934925
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSAssertion.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSAssertion.h>
+
+@implementation BKSAssertion
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSLaunchdJobSpecification.m b/src/private-frameworks/AssertionServices/src/BKSLaunchdJobSpecification.m
new file mode 100644
index 000000000..021f91817
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSLaunchdJobSpecification.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSLaunchdJobSpecification.h>
+
+@implementation BKSLaunchdJobSpecification
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSProcess.m b/src/private-frameworks/AssertionServices/src/BKSProcess.m
new file mode 100644
index 000000000..64c65a599
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSProcess.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSProcess.h>
+
+@implementation BKSProcess
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSProcessAssertion.m b/src/private-frameworks/AssertionServices/src/BKSProcessAssertion.m
new file mode 100644
index 000000000..e02fca3df
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSProcessAssertion.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSProcessAssertion.h>
+
+@implementation BKSProcessAssertion
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSProcessExitContext.m b/src/private-frameworks/AssertionServices/src/BKSProcessExitContext.m
new file mode 100644
index 000000000..ccde63034
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSProcessExitContext.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSProcessExitContext.h>
+
+@implementation BKSProcessExitContext
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSTerminationAssertion.m b/src/private-frameworks/AssertionServices/src/BKSTerminationAssertion.m
new file mode 100644
index 000000000..65b2893d4
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSTerminationAssertion.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSTerminationAssertion.h>
+
+@implementation BKSTerminationAssertion
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSTerminationAssertionObserverManager.m b/src/private-frameworks/AssertionServices/src/BKSTerminationAssertionObserverManager.m
new file mode 100644
index 000000000..7db102ae7
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSTerminationAssertionObserverManager.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSTerminationAssertionObserverManager.h>
+
+@implementation BKSTerminationAssertionObserverManager
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSTerminationContext.m b/src/private-frameworks/AssertionServices/src/BKSTerminationContext.m
new file mode 100644
index 000000000..d155e17b3
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSTerminationContext.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSTerminationContext.h>
+
+@implementation BKSTerminationContext
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/AssertionServices/src/BKSWorkspace.m b/src/private-frameworks/AssertionServices/src/BKSWorkspace.m
new file mode 100644
index 000000000..a055895b1
--- /dev/null
+++ b/src/private-frameworks/AssertionServices/src/BKSWorkspace.m
@@ -0,0 +1,34 @@
+/*
+ This file is part of Darling.
+
+ Copyright (C) 2019 Lubos Dolezel
+
+ Darling is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Darling is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Darling.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#import <AssertionServices/BKSWorkspace.h>
+
+@implementation BKSWorkspace
+
+- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
+{
+    return [NSMethodSignature signatureWithObjCTypes: "v@:"];
+}
+
+- (void)forwardInvocation:(NSInvocation *)anInvocation
+{
+    NSLog(@"Stub called: %@ in %@", NSStringFromSelector([anInvocation selector]), [self class]);
+}
+
+@end
diff --git a/src/private-frameworks/CMakeLists.txt b/src/private-frameworks/CMakeLists.txt
index 78c39be14..2ce4b80c2 100644
--- a/src/private-frameworks/CMakeLists.txt
+++ b/src/private-frameworks/CMakeLists.txt
@@ -3,6 +3,7 @@ project(private-frameworks)
 add_subdirectory(AppleFSCompression)
 add_subdirectory(AppleSauce)
 add_subdirectory(AppleSystemInfo)
+add_subdirectory(AssertionServices)
 add_subdirectory(AssetCacheServices)
 add_subdirectory(AssistantServices)
 add_subdirectory(AuthKit)
diff --git a/src/private-frameworks/include/AssertionServices b/src/private-frameworks/include/AssertionServices
new file mode 120000
index 000000000..9941d32a2
--- /dev/null
+++ b/src/private-frameworks/include/AssertionServices
@@ -0,0 +1 @@
+../AssertionServices/include/AssertionServices
\ No newline at end of file