Action to notify host of filament runout. (#12817)

5 years ago · f214118e45
91 changed files with 1166 additions and 3 deletions
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/default/Configuration.h
+++ b/Marlin/src/config/default/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/3DFabXYZ/Migbot/Configuration.h
+++ b/Marlin/src/config/examples/3DFabXYZ/Migbot/Configuration.h
@ -995,8 +995,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/AlephObjects/TAZ4/Configuration.h
+++ b/Marlin/src/config/examples/AlephObjects/TAZ4/Configuration.h
@ -1009,8 +1009,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/AliExpress/CL-260/Configuration.h
+++ b/Marlin/src/config/examples/AliExpress/CL-260/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Anet/A2/Configuration.h
+++ b/Marlin/src/config/examples/Anet/A2/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Anet/A2plus/Configuration.h
+++ b/Marlin/src/config/examples/Anet/A2plus/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Anet/A6/Configuration.h
+++ b/Marlin/src/config/examples/Anet/A6/Configuration.h
@ -1103,8 +1103,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Anet/A8/Configuration.h
+++ b/Marlin/src/config/examples/Anet/A8/Configuration.h
@ -1002,8 +1002,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/AnyCubic/i3/Configuration.h
+++ b/Marlin/src/config/examples/AnyCubic/i3/Configuration.h
@ -1000,8 +1000,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/ArmEd/Configuration.h
+++ b/Marlin/src/config/examples/ArmEd/Configuration.h
@ -990,8 +990,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Azteeg/X5GT/Configuration.h
+++ b/Marlin/src/config/examples/Azteeg/X5GT/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/BIBO/TouchX/cyclops/Configuration.h
+++ b/Marlin/src/config/examples/BIBO/TouchX/cyclops/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/BIBO/TouchX/default/Configuration.h
+++ b/Marlin/src/config/examples/BIBO/TouchX/default/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/BQ/Hephestos/Configuration.h
+++ b/Marlin/src/config/examples/BQ/Hephestos/Configuration.h
@ -977,8 +977,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/BQ/Hephestos_2/Configuration.h
+++ b/Marlin/src/config/examples/BQ/Hephestos_2/Configuration.h
@ -989,8 +989,21 @@
  #define NUM_RUNOUT_SENSORS   1     // Number of sensors, up to one per extruder. Define a FIL_RUNOUT#_PIN for each.
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/BQ/WITBOX/Configuration.h
+++ b/Marlin/src/config/examples/BQ/WITBOX/Configuration.h
@ -977,8 +977,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Cartesio/Configuration.h
+++ b/Marlin/src/config/examples/Cartesio/Configuration.h
@ -988,8 +988,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/CR-10/Configuration.h
+++ b/Marlin/src/config/examples/Creality/CR-10/Configuration.h
@ -999,8 +999,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/CR-10S/Configuration.h
+++ b/Marlin/src/config/examples/Creality/CR-10S/Configuration.h
@ -989,9 +989,22 @@
  #define FIL_RUNOUT_INVERTING true // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
-  #define FILAMENT_RUNOUT_SCRIPT "M600"
  #define FIL_RUNOUT_PIN 2 // Creality CR10-S stock sensor

+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
+  #define FILAMENT_RUNOUT_SCRIPT "M600"
+
+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/CR-10mini/Configuration.h
+++ b/Marlin/src/config/examples/Creality/CR-10mini/Configuration.h
@ -1008,8 +1008,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/CR-8/Configuration.h
+++ b/Marlin/src/config/examples/Creality/CR-8/Configuration.h
@ -999,8 +999,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/Ender-2/Configuration.h
+++ b/Marlin/src/config/examples/Creality/Ender-2/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/Ender-3/Configuration.h
+++ b/Marlin/src/config/examples/Creality/Ender-3/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Creality/Ender-4/Configuration.h
+++ b/Marlin/src/config/examples/Creality/Ender-4/Configuration.h
@ -999,8 +999,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Einstart-S/Configuration.h
+++ b/Marlin/src/config/examples/Einstart-S/Configuration.h
@ -999,8 +999,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Felix/Configuration.h
+++ b/Marlin/src/config/examples/Felix/Configuration.h
@ -971,8 +971,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Felix/DUAL/Configuration.h
+++ b/Marlin/src/config/examples/Felix/DUAL/Configuration.h
@ -971,8 +971,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/FlashForge/CreatorPro/Configuration.h
+++ b/Marlin/src/config/examples/FlashForge/CreatorPro/Configuration.h
@ -982,8 +982,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/FolgerTech/i3-2020/Configuration.h
+++ b/Marlin/src/config/examples/FolgerTech/i3-2020/Configuration.h
@ -995,8 +995,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Formbot/Raptor/Configuration.h
+++ b/Marlin/src/config/examples/Formbot/Raptor/Configuration.h
@ -1087,8 +1087,21 @@
  #define FIL_RUNOUT_INVERTING true  // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Formbot/T_Rex_2+/Configuration.h
+++ b/Marlin/src/config/examples/Formbot/T_Rex_2+/Configuration.h
@ -1019,8 +1019,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Formbot/T_Rex_3/Configuration.h
+++ b/Marlin/src/config/examples/Formbot/T_Rex_3/Configuration.h
@ -1014,8 +1014,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/GT2560/Configuration.h
+++ b/Marlin/src/config/examples/Geeetech/GT2560/Configuration.h
@ -1004,8 +1004,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/I3_Pro_X-GT2560/Configuration.h
+++ b/Marlin/src/config/examples/Geeetech/I3_Pro_X-GT2560/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/MeCreator2/Configuration.h
+++ b/Marlin/src/config/examples/Geeetech/MeCreator2/Configuration.h
@ -996,8 +996,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/Prusa
+++ b/Marlin/src/config/examples/Geeetech/Prusa
@ -1005,8 +1005,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/Prusa
+++ b/Marlin/src/config/examples/Geeetech/Prusa
@ -1004,8 +1004,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/Prusa
+++ b/Marlin/src/config/examples/Geeetech/Prusa
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Geeetech/Prusa
+++ b/Marlin/src/config/examples/Geeetech/Prusa
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Infitary/i3-M508/Configuration.h
+++ b/Marlin/src/config/examples/Infitary/i3-M508/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/JGAurora/A5/Configuration.h
+++ b/Marlin/src/config/examples/JGAurora/A5/Configuration.h
@ -1001,8 +1001,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/MakerParts/Configuration.h
+++ b/Marlin/src/config/examples/MakerParts/Configuration.h
@ -1009,8 +1009,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Malyan/M150/Configuration.h
+++ b/Marlin/src/config/examples/Malyan/M150/Configuration.h
@ -1013,8 +1013,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Malyan/M200/Configuration.h
+++ b/Marlin/src/config/examples/Malyan/M200/Configuration.h
@ -988,8 +988,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Micromake/C1/basic/Configuration.h
+++ b/Marlin/src/config/examples/Micromake/C1/basic/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Micromake/C1/enhanced/Configuration.h
+++ b/Marlin/src/config/examples/Micromake/C1/enhanced/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Mks/Robin/Configuration.h
+++ b/Marlin/src/config/examples/Mks/Robin/Configuration.h
@ -990,8 +990,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Mks/Sbase/Configuration.h
+++ b/Marlin/src/config/examples/Mks/Sbase/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/RapideLite/RL200/Configuration.h
+++ b/Marlin/src/config/examples/RapideLite/RL200/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/RepRapPro/Huxley/Configuration.h
+++ b/Marlin/src/config/examples/RepRapPro/Huxley/Configuration.h
@ -1038,8 +1038,21 @@ Black rubber belt(MXL), 18 - tooth aluminium pulley : 87.489 step per mm (Huxley
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/RepRapWorld/Megatronics/Configuration.h
+++ b/Marlin/src/config/examples/RepRapWorld/Megatronics/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/RigidBot/Configuration.h
+++ b/Marlin/src/config/examples/RigidBot/Configuration.h
@ -987,8 +987,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/SCARA/Configuration.h
+++ b/Marlin/src/config/examples/SCARA/Configuration.h
@ -1002,8 +1002,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/STM32F10/Configuration.h
+++ b/Marlin/src/config/examples/STM32F10/Configuration.h
@ -991,8 +991,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/STM32F4/Configuration.h
+++ b/Marlin/src/config/examples/STM32F4/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Sanguinololu/Configuration.h
+++ b/Marlin/src/config/examples/Sanguinololu/Configuration.h
@ -1020,8 +1020,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/TheBorg/Configuration.h
+++ b/Marlin/src/config/examples/TheBorg/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/TinyBoy2/Configuration.h
+++ b/Marlin/src/config/examples/TinyBoy2/Configuration.h
@ -1045,8 +1045,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Tronxy/X1/Configuration.h
+++ b/Marlin/src/config/examples/Tronxy/X1/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Tronxy/X3A/Configuration.h
+++ b/Marlin/src/config/examples/Tronxy/X3A/Configuration.h
@ -993,8 +993,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Tronxy/X5S/Configuration.h
+++ b/Marlin/src/config/examples/Tronxy/X5S/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Tronxy/XY100/Configuration.h
+++ b/Marlin/src/config/examples/Tronxy/XY100/Configuration.h
@ -1000,8 +1000,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/UltiMachine/Archim1/Configuration.h
+++ b/Marlin/src/config/examples/UltiMachine/Archim1/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/UltiMachine/Archim2/Configuration.h
+++ b/Marlin/src/config/examples/UltiMachine/Archim2/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/VORONDesign/Configuration.h
+++ b/Marlin/src/config/examples/VORONDesign/Configuration.h
@ -998,8 +998,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Velleman/K8200/Configuration.h
+++ b/Marlin/src/config/examples/Velleman/K8200/Configuration.h
@ -1019,8 +1019,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Velleman/K8400/Configuration.h
+++ b/Marlin/src/config/examples/Velleman/K8400/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Velleman/K8400/Dual-head/Configuration.h
+++ b/Marlin/src/config/examples/Velleman/K8400/Dual-head/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/WASP/PowerWASP/Configuration.h
+++ b/Marlin/src/config/examples/WASP/PowerWASP/Configuration.h
@ -1008,8 +1008,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/Wanhao/Duplicator
+++ b/Marlin/src/config/examples/Wanhao/Duplicator
@ -999,8 +999,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/adafruit/ST7565/Configuration.h
+++ b/Marlin/src/config/examples/adafruit/ST7565/Configuration.h
@ -989,8 +989,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/Anycubic/Kossel/Configuration.h
+++ b/Marlin/src/config/examples/delta/Anycubic/Kossel/Configuration.h
@ -1177,8 +1177,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration.h
+++ b/Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration.h
@ -1117,8 +1117,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/FLSUN/kossel/Configuration.h
+++ b/Marlin/src/config/examples/delta/FLSUN/kossel/Configuration.h
@ -1116,8 +1116,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration.h
+++ b/Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration.h
@ -1116,8 +1116,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/Geeetech/Rostock
+++ b/Marlin/src/config/examples/delta/Geeetech/Rostock
@ -1107,8 +1107,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/Hatchbox_Alpha/Configuration.h
+++ b/Marlin/src/config/examples/delta/Hatchbox_Alpha/Configuration.h
@ -1119,8 +1119,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/MKS/SBASE/Configuration.h
+++ b/Marlin/src/config/examples/delta/MKS/SBASE/Configuration.h
@ -1104,8 +1104,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/Tevo
+++ b/Marlin/src/config/examples/delta/Tevo
@ -1108,8 +1108,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/generic/Configuration.h
+++ b/Marlin/src/config/examples/delta/generic/Configuration.h
@ -1104,8 +1104,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/kossel_mini/Configuration.h
+++ b/Marlin/src/config/examples/delta/kossel_mini/Configuration.h
@ -1106,8 +1106,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/kossel_pro/Configuration.h
+++ b/Marlin/src/config/examples/delta/kossel_pro/Configuration.h
@ -1107,8 +1107,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/delta/kossel_xl/Configuration.h
+++ b/Marlin/src/config/examples/delta/kossel_xl/Configuration.h
@ -1107,8 +1107,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/gCreate/gMax1.5+/Configuration.h
+++ b/Marlin/src/config/examples/gCreate/gMax1.5+/Configuration.h
@ -1003,8 +1003,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/makibox/Configuration.h
+++ b/Marlin/src/config/examples/makibox/Configuration.h
@ -992,8 +992,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/stm32f103ret6/Configuration.h
+++ b/Marlin/src/config/examples/stm32f103ret6/Configuration.h
@ -991,8 +991,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/tvrrug/Round2/Configuration.h
+++ b/Marlin/src/config/examples/tvrrug/Round2/Configuration.h
@ -984,8 +984,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/config/examples/wt150/Configuration.h
+++ b/Marlin/src/config/examples/wt150/Configuration.h
@ -994,8 +994,21 @@
  #define FIL_RUNOUT_INVERTING false // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.
  //#define FIL_RUNOUT_PULLDOWN      // Use internal pulldown for filament runout pins.
+
+  // Set one or more commands to run on filament runout.
+  //  - Always applies to SD-card printing.
+  //  - Applies to host-based printing if ACTION_ON_FILAMENT_RUNOUT is not set.
  #define FILAMENT_RUNOUT_SCRIPT "M600"

+  // With this option, if filament runs out during host-based printing, Marlin
+  // will send "//action:<ACTION_ON_FILAMENT_RUNOUT>" to the host and let the
+  // host handle filament change. If left undefined the FILAMENT_RUNOUT_SCRIPT
+  // will be used on filament runout for both host-based and SD-card printing.
+  //
+  // The host must be able to respond to the //action: command set here.
+  //
+  //#define ACTION_ON_FILAMENT_RUNOUT "pause: filament_runout"
+
  // After a runout is detected, continue printing this length of filament
  // before executing the runout script. Useful for a sensor at the end of
  // a feed tube. Requires 4 bytes SRAM per sensor, plus 4 bytes overhead.
--- a/Marlin/src/feature/runout.h
+++ b/Marlin/src/feature/runout.h
@ -95,7 +95,13 @@ class TFilamentMonitor : public FilamentMonitorBase {
        if (ran_out) {
          filament_ran_out = true;
          #if ENABLED(EXTENSIBLE_UI)
-            ExtUI::onFilamentRunout();
+            ExtUI::onFilamentRunout(ExtUI::getActiveTool());
+          #endif
+          #ifdef FILAMENT_RUNOUT_ACTION
+            SERIAL_ECHOLNPAIR("//action:" FILAMENT_RUNOUT_ACTION " ", active_extruder);
+            if (!IS_SD_PRINTING())
+              reset();
+            else
          #endif
          enqueue_and_echo_commands_P(PSTR(FILAMENT_RUNOUT_SCRIPT));
          planner.synchronize();
--- a/Marlin/src/lcd/extensible_ui/ui_api.h
+++ b/Marlin/src/lcd/extensible_ui/ui_api.h
@ -237,7 +237,7 @@ namespace ExtUI {
  void onPrintTimerStarted();
  void onPrintTimerPaused();
  void onPrintTimerStopped();
-  void onFilamentRunout();
+  void onFilamentRunout(const extruder_t extruder);
  void onStatusChanged(const char * const msg);
  void onFactoryReset();
  void onStoreSettings();