diff --git a/protocols/schema-bundle.bin b/protocols/schema-bundle.bin
index 8c48474..bcd4487 100644
--- a/protocols/schema-bundle.bin
+++ b/protocols/schema-bundle.bin
@@ -4,8 +4,9 @@ horizontal
 WidgetType´³orµµ±NodeType´³refµ„³NodeType„„µ±LeafType´³refµ„³LeafType„„„„³WindowTitle´³rec´³lit³window-title„´³tupleµ´³named³title´³atom³String„„„„„³WidgetInstance´³rec´³lit³widget-instance„´³tupleµ´³named³id´³refµ„³WidgetId„„´³named³instance´³embedded³any„„„„„³WindowCloseable´³rec´³lit³window-closeable„´³tupleµ„„„³VisibleScrollRange´³orµµ±none´³lit³none„„µ±visibleScrollRange´³rec´³lit³visible-scroll-range„´³tupleµ´³rec´³lit³min„´³tupleµ´³named³minId´³refµ„³WidgetId„„´³named³
 minSortKey´³refµ„³SortKey„„„„„´³rec´³lit³max„´³tupleµ´³named³maxId´³refµ„³WidgetId„„´³named³
 maxSortKey´³refµ„³SortKey„„„„„„„„„„„„³embeddedType€„„µ³mime„´³schema·³version‘³definitions·³Value´³rec´³lit³mime„´³tupleµ´³named³type´³atom³Symbol„„´³named³data´³atom³
-ByteString„„„„„„³embeddedType€„„µ³time„´³schema·³version‘³definitions·³Stamp´³rec´³lit³rfc3339„´³tupleµ´³named³value´³atom³String„„„„„„³embeddedType€„„µ³audio„´³schema·³version‘³definitions·³Sink´³orµµ±speaker´³lit³speaker„„µ±headset´³lit³headset„„µ±earpiece´³lit³earpiece„„„„³Source´³orµµ±speakerphone´³lit³speakerphone„„µ±headset´³lit³headset„„µ±handset´³lit³handset„„„„³SinkMapping´³rec´³lit³alsa-sink-mapping„´³tupleµ´³named³abstract´³refµ„³Sink„„´³named³concrete´³atom³String„„„„„³HeadsetSpeakerPresent´³rec´³lit³headset-speaker-present„´³tupleµ„„„³HeadsetMicrophonePresent´³rec´³lit³headset-microphone-present„´³tupleµ„„„„³embeddedType€„„µ³hayes„´³schema·³version‘³definitions·³Result´³rec´³lit³result„´³tupleµ´³named³text´³atom³String„„´³named³tag´³refµ„³MaybeString„„´³named³fields´³refµ„³MaybeStrings„„„„„³MaybeString´³orµµ±present´³atom³String„„µ±absent´³lit€„„„„³MaybeStrings´³orµµ±present´³seqof´³atom³String„„„µ±absent´³lit€„„„„³ModemPresent´³rec´³lit³modem„´³tupleµ´³lit³hayes„´³named³
-devicePath´³atom³String„„´³named³	dataspace´³embedded´³refµ„³InternalProtocol„„„„„„³
CommandResult´³rec´³lit³command-result„´³tupleµ´³named³commandText´³atom³String„„´³named³results´³seqof´³refµ„³Result„„„´³named³finalResult´³atom³String„„„„„³ExecuteCommand´³rec´³lit³execute-command„´³tupleµ´³named³commandText´³atom³String„„´³named³replyTo´³refµ„³CommandContinuation„„„„„³InternalProtocol³any³CommandContinuation´³orµµ±replyWanted´³embedded´³refµ„³
CommandResult„„„µ±
fireAndForget´³lit€„„„„³UnsolicitedResultCode´³rec´³lit³unsolicited„´³tupleµ´³named³result´³refµ„³Result„„„„„„³embeddedType€„„µ³network„´³schema·³version‘³definitions·³Route´³rec´³lit³route„´³tupleµ´³named³
addressFamily´³refµ„³
AddressFamily„„´³named³destination´³refµ„³RouteDestination„„´³named³priority´³atom³
SignedInteger„„´³named³
typeOfService´³atom³
SignedInteger„„´³named³
interfaceName´³refµ„³RouteInterface„„´³named³gateway´³refµ„³Gateway„„„„„³Gateway´³orµµ±addr´³atom³String„„µ±none´³lit€„„„„³Hotspot´³rec´³lit³hotspot„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„´³named³authentication´³refµ„³WifiAuthentication„„„„„³	Interface´³rec´³lit³	interface„´³tupleµ´³named³name´³atom³String„„´³named³index´³atom³
SignedInteger„„´³named³type´³refµ„³
InterfaceType„„´³named³administrativeState´³refµ„³AdministrativeState„„´³named³operationalState´³refµ„³OperationalState„„´³named³carrier´³refµ„³CarrierState„„´³named³linkAddr´³atom³String„„„„„³CarrierState´³orµµ±	noCarrier´³lit³
+ByteString„„„„„„³embeddedType€„„µ³time„´³schema·³version‘³definitions·³Stamp´³rec´³lit³rfc3339„´³tupleµ´³named³value´³atom³String„„„„„„³embeddedType€„„µ³audio„´³schema·³version‘³definitions·³Sink´³orµµ±speaker´³lit³speaker„„µ±headset´³lit³headset„„µ±earpiece´³lit³earpiece„„„„³Source´³orµµ±speakerphone´³lit³speakerphone„„µ±headset´³lit³headset„„µ±handset´³lit³handset„„„„³SinkMapping´³rec´³lit³alsa-sink-mapping„´³tupleµ´³named³abstract´³refµ„³Sink„„´³named³concrete´³atom³String„„„„„³HeadsetSpeakerPresent´³rec´³lit³headset-speaker-present„´³tupleµ„„„³HeadsetMicrophonePresent´³rec´³lit³headset-microphone-present„´³tupleµ„„„„³embeddedType€„„µ³hayes„´³schema·³version‘³definitions·³Result´³rec´³lit³result„´³tupleµ´³named³text´³atom³String„„´³named³tag´³refµ„³MaybeString„„´³named³fields´³refµ„³MaybeStrings„„„„„³
+CommandRPC´³rec´³lit³execute-command„´³tupleµ´³named³commandText´³atom³String„„´³named³replyTo´³embedded´³refµ„³
CommandResult„„„„„„³MaybeString´³orµµ±present´³atom³String„„µ±absent´³lit€„„„„³CommandEvent´³rec´³lit³execute-command„´³tupleµ´³named³commandText´³atom³String„„„„„³MaybeStrings´³orµµ±present´³seqof´³atom³String„„„µ±absent´³lit€„„„„³ModemPresent´³rec´³lit³modem„´³tupleµ´³lit³hayes„´³named³
+devicePath´³atom³String„„´³named³	dataspace´³embedded´³refµ„³InternalProtocol„„„„„„³
CommandResult´³rec´³lit³command-result„´³tupleµ´³named³commandText´³atom³String„„´³named³results´³seqof´³refµ„³Result„„„´³named³finalResult´³atom³String„„„„„³InternalProtocol³any³UnsolicitedResultCode´³rec´³lit³unsolicited„´³tupleµ´³named³result´³refµ„³Result„„„„„„³embeddedType€„„µ³network„´³schema·³version‘³definitions·³Route´³rec´³lit³route„´³tupleµ´³named³
addressFamily´³refµ„³
AddressFamily„„´³named³destination´³refµ„³RouteDestination„„´³named³priority´³atom³
SignedInteger„„´³named³
typeOfService´³atom³
SignedInteger„„´³named³
interfaceName´³refµ„³RouteInterface„„´³named³gateway´³refµ„³Gateway„„„„„³Gateway´³orµµ±addr´³atom³String„„µ±none´³lit€„„„„³Hotspot´³rec´³lit³hotspot„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„´³named³authentication´³refµ„³WifiAuthentication„„„„„³	Interface´³rec´³lit³	interface„´³tupleµ´³named³name´³atom³String„„´³named³index´³atom³
SignedInteger„„´³named³type´³refµ„³
InterfaceType„„´³named³administrativeState´³refµ„³AdministrativeState„„´³named³operationalState´³refµ„³OperationalState„„´³named³carrier´³refµ„³CarrierState„„´³named³linkAddr´³atom³String„„„„„³CarrierState´³orµµ±	noCarrier´³lit³
 no-carrier„„µ±carrier´³lit³carrier„„„„³DefaultRoute´³rec´³lit³
default-route„´³tupleµ´³named³
addressFamily´³refµ„³
AddressFamily„„„„„³HotspotState´³rec´³lit³
hotspot-state„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„´³named³stationCount´³atom³
SignedInteger„„„„„³
AddressFamily´³orµµ±ipv4´³lit³ipv4„„µ±ipv6´³lit³ipv6„„µ±other´³atom³
SignedInteger„„„„³
InterfaceType´³orµµ±loopback´³lit³loopback„„µ±normal´³lit³normal„„µ±wireless´³lit³wireless„„„„³
MobileDataApn´³rec´³lit³mobile-data-apn„´³tupleµ´³named³apn´³atom³String„„„„„³RouteInterface´³orµµ±name´³atom³String„„µ±none´³lit€„„„„³WifiAssociation´³rec´³lit³wifi-association„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„´³named³state´³refµ„³WifiAssociationState„„„„„³OperationalState´³orµµ±unknown´³lit³unknown„„µ±down´³lit³down„„µ±lowerLayerDown´³lit³lower-layer-down„„µ±testing´³lit³testing„„µ±dormant´³lit³dormant„„µ±up´³lit³up„„„„³RouteDestination´³orµµ±default´³lit³default„„µ±prefix´³rec´³lit³prefix„´³tupleµ´³named³net´³atom³String„„´³named³bits´³atom³
SignedInteger„„„„„„„„³SavedWifiNetwork´³rec´³lit³saved-wifi-network„´³tupleµ´³named³ssid´³atom³String„„´³named³authentication´³refµ„³WifiAuthentication„„´³named³priority´³atom³Double„„„„„³MobileDataEnabled´³rec´³lit³mobile-data-enabled„´³tupleµ„„„³WifiAuthentication´³orµµ±open´³lit³open„„µ±psk´³rec´³lit³psk„´³tupleµ´³named³password´³atom³String„„„„„„µ±other³any„„„³AdministrativeState´³orµµ±unknown´³lit³unknown„„µ±down´³lit³down„„µ±up´³lit³up„„„„³SelectedWifiNetwork´³rec´³lit³selected-wifi-network„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„´³named³authentication´³refµ„³WifiAuthentication„„„„„³AvailableAccessPoint´³rec´³lit³available-ap„´³tupleµ´³named³
interfaceName´³atom³String„„´³named³ssid´³atom³String„„„„„³WifiAssociationState´³orµµ±
 inProgress´³lit³in-progress„„µ±ready´³lit³ready„„„„„³embeddedType€„„µ³	telephony„´³schema·³version‘³definitions·³CallId´³atom³
SignedInteger„³Address´³rec´³lit³address„´³tupleµ´³named³
 numberType´³refµ„³
diff --git a/protocols/schemas/hayes.prs b/protocols/schemas/hayes.prs
index 296be00..7a185f6 100644
--- a/protocols/schemas/hayes.prs
+++ b/protocols/schemas/hayes.prs
@@ -11,8 +11,9 @@ InternalProtocol = any .
 UnsolicitedResultCode = <unsolicited @result Result> .
 
 ; Assertion. Asks the modem to execute the given command.
-ExecuteCommand = <execute-command @commandText string @replyTo CommandContinuation> .
-CommandContinuation = @replyWanted #!CommandResult / @fireAndForget #f .
+CommandRPC = <execute-command @commandText string @replyTo #!CommandResult> .
+; Message. Asks the modem to execute the given command, but not to send back the reply.
+CommandEvent = <execute-command @commandText string> .
 
 ; Assertion. Describes the result of a command execution.
 CommandResult = <command-result @commandText string @results [Result ...] @finalResult string> .
