Do not rely on AllowCommand to stop egg from moving, this is UI, not mechanics.

Removed unwanted egg commands properly.
Eggs update their morph buttons when transferred.
Morph buttons update _after_ a commander joins a new team, not _before_ they leave their old one.
Left Egg with Move and Attack Move as these will be inherited by hatched commanders.
Stopped move commands being removed from a "stuck" egg.
Fixed egg collision and selection volumes.
Reduced default impact location transport speed, to accommodate egg in Charon.
Updated gadget information.

Author: GoogleFrog

LuaRules/Gadgets/cmd_raw_move.lua

@@ -106,7 +106,7 @@ for i = 1, #UnitDefs do
 		else
 			turnPeriods[i] = 8
 		end
-		if ud.speed == 0 then -- Structures with move commands
+		if ud.speed == 0 or ud.customParams.no_move_speed then -- Structures with move commands
 			startMovingTime[i] = 10000000 -- Never cancel orders due to no progress
 		elseif (ud.moveDef.maxSlope or 0) > 0.8 and ud.speed < 60 then
 			-- Slow spiders need a lot of leeway when climing cliffs.

LuaRules/Gadgets/unit_commander_egg.lua

@@ -7,8 +7,9 @@ function gadget:GetInfo()
 	return {
 		name      = "Commander Egg",
 		desc      = "Manages commander egg hatching limits and morph button state",
-		author    = "Orlicek, Licho",
+		author    = "Orlicek, Licho, GoogleFrog",
 		license   = "GNU GPL, v2 or later",
+		date      = "May, 2026",
 		layer     = -1,
 		enabled   = true,
 	}
@@ -183,36 +184,17 @@ function GG.MorphCompleted(oldUnitID, newUnitID, teamID)
 	return true
 end
 
---------------------------------------------------------------------------------
--- Block move commands on eggs (egg has speed for blocking but should not move)
---------------------------------------------------------------------------------
-
-local blockedCmds = {
-	[CMD.MOVE] = true,
-	[CMD.FIGHT] = true,
-	[CMD.PATROL] = true,
-	[CMD.GUARD] = true,
-	[SUC.RAW_MOVE] = true,
-}
-
-function gadget:AllowCommand(unitID, unitDefID, teamID, cmdID, cmdParams, cmdOptions)
-	if unitDefID == eggDefID and blockedCmds[cmdID] then
-		return false
-	end
-	return true
-end
-
 --------------------------------------------------------------------------------
 -- Event handlers for button greying
 --------------------------------------------------------------------------------
 
 local pendingEggUpdate = false
-local cmdsToRemove = {CMD.MOVE, CMD.PATROL, CMD.FIGHT, CMD.GUARD, CMD.MOVE_STATE, CMD.FIRE_STATE, Spring.Utilities.CMD.RAW_MOVE}
 
 function gadget:UnitCreated(unitID, unitDefID, teamID)
 	if unitDefID == eggDefID then
 		IterableMap.Add(eggs, unitID)
 		pendingEggUpdate = true
+		GG.Attributes.AddEffect(unitID, "no_move", {move = 0})
 	end
 	if Spring.Utilities.isComm(unitDefID) then
 		IterableMap.Add(commanders, unitID)
@@ -225,14 +207,6 @@ end
 
 function gadget:UnitFinished(unitID, unitDefID, teamID)
 	if unitDefID == eggDefID then
-		-- remove movement-related command buttons
-		for _, cmdID in ipairs(cmdsToRemove) do
-			local cmdDescID = Spring.FindUnitCmdDesc(unitID, cmdID)
-			if cmdDescID then
-				Spring.RemoveUnitCmdDesc(unitID, cmdDescID)
-			end
-		end
-		Spring.GiveOrderToUnit(unitID, CMD.STOP, {}, 0)
 		UpdateEggMorphButtons()
 	end
 end
@@ -252,8 +226,8 @@ function gadget:UnitDestroyed(unitID, unitDefID, teamID)
 	end
 end
 
-function gadget:UnitTaken(unitID, unitDefID, oldTeamID, newTeamID)
-	if Spring.Utilities.isComm(unitDefID) then
+function gadget:UnitGiven(unitID, unitDefID, oldTeamID, teamID)
+	if Spring.Utilities.isComm(unitDefID) or unitDefID == eggDefID then
 		UpdateEggMorphButtons()
 	end
 end

LuaUI/Widgets/cmd_newton_firezone.lua

@@ -174,8 +174,8 @@ options = {
 		name = "Drop prediction speed threshold",
 		desc = "Draw prediction for transports above this speed.",
 		type = 'number',
-		min = 0, max = 8, step = 0.2,
-		value = 5,
+		min = 0, max = 8, step = 0.1,
+		value = 4,
 		OnChange = function(self)
 			transportPredictionSpeedSq = self.value^2
 		end,

units/commander_egg.lua

@@ -3,22 +3,24 @@ return { commander_egg = {
   description         = [[Morphs into a Commander. Disarm and slow explosion on death.]],
   builder             = false,
   buildPic            = [[commander_egg.png]],
+  canGuard            = false,
   canMove             = true,
+  canPatrol           = false,
   cantBeTransported   = false,
   category            = [[LAND UNARMED]],
   collisionVolumeOffsets  = [[0 0 0]],
-  collisionVolumeScales   = [[36 45 36]],
-  collisionVolumeType     = [[CylY]],
+  collisionVolumeScales   = [[32 48 32]],
+  collisionVolumeType     = [[ellipsoid]],
   selectionVolumeOffsets  = [[0 0 0]],
-  selectionVolumeScales   = [[40 40 40]],
-  selectionVolumeType     = [[CylY]],
+  selectionVolumeScales   = [[44 55 44]],
+  selectionVolumeType     = [[ellipsoid]],
   corpse              = [[DEAD]],
 
   customParams        = {
     instantselfd = [[1]],
-    midposoffset = [[0 15 0]],
     modelradius = [[15]],
     stats_show_death_explosion = 1,
+    no_move_speed = 1,
 
     morphto_1    = [[dynstrike0]],
     morphtime_1  = 60,
@@ -52,7 +54,7 @@ return { commander_egg = {
   objectName          = [[commander_egg.s3o]],
   script              = [[commander_egg.lua]],
   selfDestructAs      = [[COMMANDER_EGG_EMP]],
-  sightDistance        = 300,
+  sightDistance       = 300,
   speed               = 40,
 
   weaponDefs          = {