diff --git a/cgcs-patch/bin/sw-patch.completion b/cgcs-patch/bin/sw-patch.completion
index 145e7638..59c55297 100644
--- a/cgcs-patch/bin/sw-patch.completion
+++ b/cgcs-patch/bin/sw-patch.completion
@@ -31,6 +31,9 @@ function _swpatch()
         upload-dir
         what-requires
         drop-host
+        is-applied
+        report-app-dependencies
+        query-app-dependencies
     "
     if [ -f /etc/platform/.initial_config_complete ]; then
         # Post-config, so the host-install commands are accessible
@@ -48,12 +51,18 @@ function _swpatch()
         #  Complete the arguments to the subcommands.
         #
         case "$subcommand" in
-            apply|remove|delete|show|what-requires)
+            apply|delete|show|what-requires|is-applied)
                 # Query the list of known patches
                 local patches=$(sw-patch completion patches 2>/dev/null)
                 COMPREPLY=( $(compgen -W "${patches}" -- ${cur}) )
                 return 0
                 ;;
+            remove)
+                # Query the list of known patches
+                local patches=$(sw-patch completion patches 2>/dev/null)
+                COMPREPLY=( $(compgen -W "--skipappcheck ${patches}" -- ${cur}) )
+                return 0
+                ;;
             host-install|host-install-async|drop-host)
                 if [ "${prev}" = "${subcommand}" -o "${prev}" = "--force" ]; then
                     # Query the list of known hosts
@@ -109,6 +118,20 @@ function _swpatch()
                 fi
                 return 0
                 ;;
+            report-app-dependencies)
+                if [ "${prev}" = "${subcommand}" ]; then
+                    COMPREPLY=( $(compgen -W "--app" -- ${cur}) )
+                elif [ "${prev}" = "--app" ]; then
+                    COMPREPLY=
+                else
+                    local patches=$(sw-patch completion patches 2>/dev/null)
+                    COMPREPLY=( $(compgen -W "${patches}" -- ${cur}) )
+                fi
+                return 0
+                ;;
+            query-app-dependencies)
+                return 0
+                ;;
             *)
                 ;;
         esac
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/api/controllers/root.py b/cgcs-patch/cgcs-patch/cgcs_patch/api/controllers/root.py
index dd7de11a..f76c5394 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/api/controllers/root.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/api/controllers/root.py
@@ -1,5 +1,5 @@
 """
-Copyright (c) 2014-2017 Wind River Systems, Inc.
+Copyright (c) 2014-2019 Wind River Systems, Inc.
 
 SPDX-License-Identifier: Apache-2.0
 
@@ -258,6 +258,25 @@ class PatchAPIController(object):
 
         return result
 
+    @expose('json')
+    def is_applied(self, *args):
+        return pc.is_applied(list(args))
+
+    @expose('json')
+    def report_app_dependencies(self, *args, **kwargs):
+        try:
+            result = pc.report_app_dependencies(list(args), **kwargs)
+        except PatchError as e:
+            return dict(status=500, error=e.message)
+
+        pc.patch_sync()
+
+        return result
+
+    @expose('json')
+    def query_app_dependencies(self):
+        return pc.query_app_dependencies()
+
 
 class RootController(object):
 
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/constants.py b/cgcs-patch/cgcs-patch/cgcs_patch/constants.py
index 8060d9a1..3a986a0c 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/constants.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/constants.py
@@ -1,5 +1,5 @@
 """
-Copyright (c) 2015-2017 Wind River Systems, Inc.
+Copyright (c) 2015-2019 Wind River Systems, Inc.
 
 SPDX-License-Identifier: Apache-2.0
 
@@ -20,6 +20,8 @@ PATCH_AGENT_STATE_INSTALLING = "installing"
 PATCH_AGENT_STATE_INSTALL_FAILED = "install-failed"
 PATCH_AGENT_STATE_INSTALL_REJECTED = "install-rejected"
 
+PATCH_STORAGE_DIR = "/opt/patching"
+
 ADDRESS_VERSION_IPV4 = 4
 ADDRESS_VERSION_IPV6 = 6
 CONTROLLER_FLOATING_HOSTNAME = "controller"
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/exceptions.py b/cgcs-patch/cgcs-patch/cgcs_patch/exceptions.py
index 1cd22e79..f03e7189 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/exceptions.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/exceptions.py
@@ -45,3 +45,8 @@ class PatchValidationFailure(PatchError):
 class PatchMismatchFailure(PatchError):
     """Patch validation error."""
     pass
+
+
+class PatchInvalidRequest(PatchError):
+    """Invalid API request."""
+    pass
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/patch_client.py b/cgcs-patch/cgcs-patch/cgcs_patch/patch_client.py
index 82599481..32fd1223 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/patch_client.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/patch_client.py
@@ -60,6 +60,13 @@ help_install_local = "Trigger patch install/remove on the local host. " + \
 help_drop_host = "Drop specified host from table."
 help_query_dependencies = "List dependencies for specified patch. Use " + \
     constants.CLI_OPT_RECURSIVE + " for recursive query."
+help_is_applied = "Query Applied state for list of patches. " + \
+    "Returns True if all are Applied, False otherwise."
+help_report_app_dependencies = "Report application patch dependencies, " + \
+    "specifying application name with --app option, plus a list of patches. " + \
+    "Reported dependencies can be dropped by specifying app with no patch list."
+help_query_app_dependencies = "Display set of reported application patch " + \
+    "dependencies."
 help_commit = "Commit patches to free disk space. WARNING: This action " + \
     "is irreversible!"
 help_region_name = "Send the request to a specified region"
@@ -132,6 +139,15 @@ def print_help():
     print(textwrap.fill("    {0:<15} ".format("query-dependencies:") + help_query_dependencies,
                         width=TERM_WIDTH, subsequent_indent=' ' * 20))
     print("")
+    print(textwrap.fill("    {0:<15} ".format("is-applied:") + help_is_applied,
+                        width=TERM_WIDTH, subsequent_indent=' ' * 20))
+    print("")
+    print(textwrap.fill("    {0:<15} ".format("report-app-dependencies:") + help_report_app_dependencies,
+                        width=TERM_WIDTH, subsequent_indent=' ' * 20))
+    print("")
+    print(textwrap.fill("    {0:<15} ".format("query-app-dependencies:") + help_query_app_dependencies,
+                        width=TERM_WIDTH, subsequent_indent=' ' * 20))
+    print("")
     print(textwrap.fill("    {0:<15} ".format("commit:") + help_commit,
                         width=TERM_WIDTH, subsequent_indent=' ' * 20))
     print("")
@@ -433,14 +449,14 @@ def patch_apply_req(debug, args):
 
 
 def patch_remove_req(debug, args):
-    extra_opts = ""
-
     if len(args) == 0:
         print_help()
 
     # Ignore interrupts during this function
     signal.signal(signal.SIGINT, signal.SIG_IGN)
 
+    extra_opts = []
+
     # The removeunremovable option is hidden and should not be added to help
     # text or customer documentation. It is for emergency use only - under
     # supervision of the design team.
@@ -450,12 +466,25 @@ def patch_remove_req(debug, args):
         # Get rid of the --removeunremovable
         args.pop(idx)
 
-        # Format the extra opts
-        extra_opts = "?removeunremovable=yes"
+        # Append the extra opts
+        extra_opts.append('removeunremovable=yes')
+
+    if "--skipappcheck" in args:
+        idx = args.index("--skipappcheck")
+
+        # Get rid of the --skipappcheck
+        args.pop(idx)
+
+        # Append the extra opts
+        extra_opts.append("skipappcheck=yes")
+
+    if len(extra_opts) == 0:
+        extra_opts_str = ''
+    else:
+        extra_opts_str = '?%s' % '&'.join(extra_opts)
 
     patches = "/".join(args)
-
-    url = "http://%s/patch/remove/%s%s" % (api_addr, patches, extra_opts)
+    url = "http://%s/patch/remove/%s%s" % (api_addr, patches, extra_opts_str)
 
     headers = {}
     append_auth_token_if_required(headers)
@@ -1097,6 +1126,103 @@ def patch_del_release(debug, args):
     return check_rc(req)
 
 
+def patch_is_applied_req(args):
+    if len(args) == 0:
+        print_help()
+
+    patches = "/".join(args)
+    url = "http://%s/patch/is_applied/%s" % (api_addr, patches)
+
+    headers = {}
+    append_auth_token_if_required(headers)
+    req = requests.post(url, headers=headers)
+
+    rc = 1
+
+    if req.status_code == 200:
+        result = json.loads(req.text)
+        print(result)
+        if result is True:
+            rc = 0
+    elif req.status_code == 500:
+        print("An internal error has occurred. Please check /var/log/patching.log for details")
+
+    return rc
+
+
+def patch_report_app_dependencies_req(debug, args):
+    if len(args) < 2:
+        print_help()
+
+    extra_opts = []
+
+    if "--app" in args:
+        idx = args.index("--app")
+
+        # Get rid of the --app and get the app name
+        args.pop(idx)
+        app = args.pop(idx)
+
+        # Append the extra opts
+        extra_opts.append("app=%s" % app)
+    else:
+        print("Application name must be specified with --app argument.")
+        return 1
+
+    extra_opts_str = '?%s' % '&'.join(extra_opts)
+
+    patches = "/".join(args)
+    url = "http://%s/patch/report_app_dependencies/%s%s" % (api_addr, patches, extra_opts_str)
+
+    headers = {}
+    append_auth_token_if_required(headers)
+    req = requests.post(url, headers=headers)
+
+    if req.status_code == 200:
+        return 0
+    else:
+        return 1
+
+
+def patch_query_app_dependencies_req():
+    url = "http://%s/patch/query_app_dependencies" % api_addr
+
+    headers = {}
+    append_auth_token_if_required(headers)
+    req = requests.post(url, headers=headers)
+
+    if req.status_code == 200:
+        data = json.loads(req.text)
+        if len(data) == 0:
+            print("There are no application dependencies.")
+        else:
+            hdr_app = "Application"
+            hdr_list = "Required Patches"
+            width_app = len(hdr_app)
+            width_list = len(hdr_list)
+
+            for app, patch_list in data.items():
+                width_app = max(width_app, len(app))
+                width_list = max(width_list, len(', '.join(patch_list)))
+
+            print("{0:<{width_app}}  {1:<{width_list}}".format(
+                hdr_app, hdr_list,
+                width_app=width_app, width_list=width_list))
+
+            print("{0}  {1}".format(
+                '=' * width_app, '=' * width_list))
+
+            for app, patch_list in sorted(data.items()):
+                print("{0:<{width_app}}  {1:<{width_list}}".format(
+                    app, ', '.join(patch_list),
+                    width_app=width_app, width_list=width_list))
+
+        return 0
+    else:
+        print("An internal error has occurred. Please check /var/log/patching.log for details")
+        return 1
+
+
 def completion_opts(args):
     if len(args) != 1:
         return 1
@@ -1306,6 +1432,12 @@ def main():
             rc = patch_init_release(debug, sys.argv[2:])
         elif action == "del-release":
             rc = patch_del_release(debug, sys.argv[2:])
+        elif action == "is-applied":
+            rc = patch_is_applied_req(sys.argv[2:])
+        elif action == "report-app-dependencies":
+            rc = patch_report_app_dependencies_req(debug, sys.argv[2:])
+        elif action == "query-app-dependencies":
+            rc = patch_query_app_dependencies_req()
         elif action == "completion":
             rc = completion_opts(sys.argv[2:])
         else:
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/patch_controller.py b/cgcs-patch/cgcs-patch/cgcs_patch/patch_controller.py
index 4cf48d46..ab3346d3 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/patch_controller.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/patch_controller.py
@@ -5,6 +5,7 @@ SPDX-License-Identifier: Apache-2.0
 
 """
 import shutil
+import tempfile
 import threading
 import time
 import socket
@@ -36,6 +37,7 @@ from cgcs_patch.exceptions import MetadataFail
 from cgcs_patch.exceptions import RpmFail
 from cgcs_patch.exceptions import PatchError
 from cgcs_patch.exceptions import PatchFail
+from cgcs_patch.exceptions import PatchInvalidRequest
 from cgcs_patch.exceptions import PatchValidationFailure
 from cgcs_patch.exceptions import PatchMismatchFailure
 from cgcs_patch.patch_functions import LOG
@@ -58,7 +60,9 @@ CONF = oslo_cfg.CONF
 pidfile_path = "/var/run/patch_controller.pid"
 
 pc = None
-state_file = "/opt/patching/.controller.state"
+state_file = "%s/.controller.state" % constants.PATCH_STORAGE_DIR
+app_dependency_basename = "app_dependencies.json"
+app_dependency_filename = "%s/%s" % (constants.PATCH_STORAGE_DIR, app_dependency_basename)
 
 insvc_patch_restart_controller = "/run/patching/.restart.patch-controller"
 
@@ -581,6 +585,15 @@ class PatchController(PatchService):
 
         self.allow_insvc_patching = True
 
+        if os.path.exists(app_dependency_filename):
+            try:
+                with open(app_dependency_filename, 'r') as f:
+                    self.app_dependencies = json.loads(f.read())
+            except Exception:
+                LOG.exception("Failed to read app dependencies: %s" % app_dependency_filename)
+        else:
+            self.app_dependencies = {}
+
         if os.path.isfile(state_file):
             self.read_state_file()
         else:
@@ -669,6 +682,16 @@ class PatchController(PatchService):
         self.patch_data.load_all()
         self.check_patch_states()
         self.hosts_lock.release()
+
+        if os.path.exists(app_dependency_filename):
+            try:
+                with open(app_dependency_filename, 'r') as f:
+                    self.app_dependencies = json.loads(f.read())
+            except Exception:
+                LOG.exception("Failed to read app dependencies: %s" % app_dependency_filename)
+        else:
+            self.app_dependencies = {}
+
         self.patch_data_lock.release()
 
         return True
@@ -1221,6 +1244,24 @@ class PatchController(PatchService):
 
             return dict(info=msg_info, warning=msg_warning, error=msg_error)
 
+        if kwargs.get("skipappcheck") != "yes":
+            # Check application dependencies before removing
+            required_patches = {}
+            for patch_id in patch_list:
+                for appname, iter_patch_list in self.app_dependencies.items():
+                    if patch_id in iter_patch_list:
+                        if patch_id not in required_patches:
+                            required_patches[patch_id] = []
+                        required_patches[patch_id].append(appname)
+
+            if len(required_patches) > 0:
+                for req_patch, app_list in required_patches.items():
+                    msg = "%s is required by application(s): %s" % (req_patch, ", ".join(sorted(app_list)))
+                    msg_error += msg + "\n"
+                    LOG.info(msg)
+
+                return dict(info=msg_info, warning=msg_warning, error=msg_error)
+
         for patch_id in patch_list:
             msg = "Removing patch: %s" % patch_id
             LOG.info(msg)
@@ -2103,6 +2144,71 @@ class PatchController(PatchService):
 
         return dict(info=msg_info, warning=msg_warning, error=msg_error)
 
+    def is_applied(self, patch_ids):
+        all_applied = True
+
+        self.patch_data_lock.acquire()
+
+        for patch_id in patch_ids:
+            if patch_id not in self.patch_data.metadata:
+                all_applied = False
+                break
+
+            if self.patch_data.metadata[patch_id]["patchstate"] != constants.APPLIED:
+                all_applied = False
+                break
+
+        self.patch_data_lock.release()
+
+        return all_applied
+
+    def report_app_dependencies(self, patch_ids, **kwargs):
+        """
+        Handle report of application dependencies
+        """
+        if "app" not in kwargs:
+            raise PatchInvalidRequest
+
+        appname = kwargs.get("app")
+
+        LOG.info("Handling app dependencies report: app=%s, patch_ids=%s" %
+                 (appname, ','.join(patch_ids)))
+
+        self.patch_data_lock.acquire()
+
+        if len(patch_ids) == 0:
+            if appname in self.app_dependencies:
+                del self.app_dependencies[appname]
+        else:
+            self.app_dependencies[appname] = patch_ids
+
+        try:
+            tmpfile, tmpfname = tempfile.mkstemp(
+                prefix=app_dependency_basename,
+                dir=constants.PATCH_STORAGE_DIR)
+
+            os.write(tmpfile, json.dumps(self.app_dependencies))
+            os.close(tmpfile)
+
+            os.rename(tmpfname, app_dependency_filename)
+        except Exception:
+            LOG.exception("Failed in report_app_dependencies")
+            raise PatchFail("Internal failure")
+        finally:
+            self.patch_data_lock.release()
+
+    def query_app_dependencies(self):
+        """
+        Query application dependencies
+        """
+        self.patch_data_lock.acquire()
+
+        data = self.app_dependencies
+
+        self.patch_data_lock.release()
+
+        return dict(data)
+
 
 # The wsgiref.simple_server module has an error handler that catches
 # and prints any exceptions that occur during the API handling to stderr.
diff --git a/cgcs-patch/cgcs-patch/cgcs_patch/patch_functions.py b/cgcs-patch/cgcs-patch/cgcs_patch/patch_functions.py
index ef8f0362..79037c3c 100644
--- a/cgcs-patch/cgcs-patch/cgcs_patch/patch_functions.py
+++ b/cgcs-patch/cgcs-patch/cgcs_patch/patch_functions.py
@@ -1,5 +1,5 @@
 """
-Copyright (c) 2014-2018 Wind River Systems, Inc.
+Copyright (c) 2014-2019 Wind River Systems, Inc.
 
 SPDX-License-Identifier: Apache-2.0
 
@@ -38,7 +38,7 @@ except Exception:
     SW_VERSION = "unknown"
 
 # Constants
-patch_dir = "/opt/patching"
+patch_dir = constants.PATCH_STORAGE_DIR
 avail_dir = "%s/metadata/available" % patch_dir
 applied_dir = "%s/metadata/applied" % patch_dir
 committed_dir = "%s/metadata/committed" % patch_dir