diff --git a/compatibility/2.4.nom b/compatibility/2.4.nom
index 2207343..4b416fb 100644
--- a/compatibility/2.4.nom
+++ b/compatibility/2.4.nom
@@ -17,20 +17,20 @@ upgrade %tree to "2.4" as:
                     (not (%line is syntax tree)):
                         compile error at %tree.source "WUT: %s"
                     (not (%line is "Action" syntax tree)):
-                        add %line to %new_lines
+                        %new_lines::add %line
                     (%line.stub is "* %"):
-                        add %line.2 to %conditions
+                        %conditions::add %line.2
                     (%line.stub == "* else %"):
-                        add (\(else %block) with vars {block:%line.3}) to %new_lines
+                        %new_lines::add (\(else %block) with vars {block:%line.3})
                     (%line.stub != "* % %"):
-                        add %line to %new_lines
+                        %new_lines::add %line
                     else:
-                        add %line.2 to %conditions
+                        %conditions::add %line.2
                         %action = %line.3
                         unless (%action is "Block" syntax tree):
                             %action = (=lua "Block(\%action.source, \%action)")
-                        add %action to %conditions
-                        add (=lua "Action(\%conditions[1].source, unpack(\%conditions))") to %new_lines
+                        %conditions::add %action
+                        %new_lines::add (=lua "Action(\%conditions[1].source, unpack(\%conditions))")
                         %conditions = []
             
             return (..)
@@ -44,20 +44,20 @@ upgrade %tree to "2.4" as:
             for %line in %body:
                 if:
                     (not (%line is "Action" syntax tree)):
-                        add %line to %new_lines
+                        %new_lines::add %line
                     (%line.stub is "* %"):
-                        add %line.2 to %values
+                        %values::add %line.2
                     (%line.stub == "* else %"):
-                        add (\(else %block) with vars {block:%line.3}) to %new_lines
+                        %new_lines::add (\(else %block) with vars {block:%line.3})
                     (%line.stub != "* % %"):
-                        add %line to %new_lines
+                        %new_lines::add %line
                     else:
-                        add %line.2 to %values
+                        %values::add %line.2
                         %action = %line.3
                         unless (%action is "Block" syntax tree):
                             %action = \(: %action)
-                        add %action to %values
-                        add (=lua "Action(\%values[1].source, unpack(\%values))") to %new_lines
+                        %values::add %action
+                        %new_lines::add (=lua "Action(\%values[1].source, unpack(\%values))")
                         %values = []
             
             return (..)
diff --git a/compatibility/3.6.nom b/compatibility/3.6.nom
index 297612a..ecf4fb3 100644
--- a/compatibility/3.6.nom
+++ b/compatibility/3.6.nom
@@ -4,17 +4,27 @@
 
 use "compatibility/compatibility.nom"
 
-upgrade action (to %1 write %2) to "3.6" as (%1::append %2)
-upgrade action (%1 <-write %2) to "3.6" as (%1::append %2)
-upgrade action (to %1 write %2 joined by %3) to "3.6" as (..)
+upgrade action [..]
+    append %item to %list, add %item to %list, to %list add %item, to %list append %item
+..to "3.6" as (%list::add %item)
+
+upgrade action [add %item to %list at index %i] to "3.6" as (..)
+    %list::at index %i add %item
+
+upgrade action [pop from %list, remove last from %list] to "3.6" as (%list::pop)
+upgrade action [remove index %index from %list] to "3.6" as (..)
+    %list::remove index %index
+
+upgrade action [to %1 write %2, %1 <-write %2] to "3.6" as (%1::append %2)
+upgrade action [to %1 write %2 joined by %3] to "3.6" as (..)
     %1::append %2 joined by %3
 
-upgrade action (declare locals in %lua) to "3.6" as (%lua::declare locals)
-upgrade action (declare locals %locs in %lua) to "3.6" as (..)
+upgrade action [declare locals in %lua] to "3.6" as (%lua::declare locals)
+upgrade action [declare locals %locs in %lua] to "3.6" as (..)
     %lua::declare locals %locs
 
-upgrade action (add free vars %vars to %lua) to "3.6" as (..)
+upgrade action [add free vars %vars to %lua] to "3.6" as (..)
     %lua::add free vars %vars
 
-upgrade action (remove free vars %vars from %lua) to "3.6" as (..)
+upgrade action [remove free vars %vars from %lua] to "3.6" as (..)
     %lua::remove free vars %vars
diff --git a/compatibility/compatibility.nom b/compatibility/compatibility.nom
index d74cabe..d63383b 100644
--- a/compatibility/compatibility.nom
+++ b/compatibility/compatibility.nom
@@ -39,9 +39,9 @@ compile [upgrade action %actions to %version as %body] to:
                 
                 (%t is syntax tree):
                     %args = ((make tree %) for % in %t)
-                    add "source=\(\%tree as lua id).source" to %args at index 1
+                    %args::add "source=\(\%tree as lua id).source"
                     if %t.target:
-                        add "target=\(make tree %t.target)" to %args at index 1
+                        %args::add "target=\(make tree %t.target)"
                     return "\(%t.type){\(%args joined with ", ")}"
                 
                 else:
diff --git a/core/collections.nom b/core/collections.nom
index cba20f9..aade458 100644
--- a/core/collections.nom
+++ b/core/collections.nom
@@ -58,9 +58,9 @@ test:
     %list = [1, 2, 3, 4, 5]
     append 6 to %list
     assume ((last in %list) is 6)
-    pop from %list
+    %list::pop
     assume ((last in %list) is 5)
-    remove index 1 from %list
+    %list::remove index 1
     assume ((first in %list) is 2)
 compile [..]
     append %item to %list, add %item to %list, to %list add %item, to %list append %item
@@ -85,7 +85,7 @@ parse [%expression for %item in %iterable] as (..)
     result of:
         %comprehension = []
         for %item in %iterable:
-            add %expression to %comprehension
+            %comprehension::add %expression
         return %comprehension
 
 parse [..]
@@ -95,7 +95,7 @@ parse [..]
     result of:
         %comprehension = []
         for %index in %start to %stop via %step:
-            add %expression to %comprehension
+            %comprehension::add %expression
         return %comprehension
 
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -114,7 +114,7 @@ parse [..]
     result of:
         %comprehension = []
         for %key = %value in %iterable:
-            add %expression to %comprehension
+            %comprehension::add %expression
         return %comprehension
 
 # Dict comprehensions
@@ -164,7 +164,7 @@ test:
 action [%lists flattened]:
     %flat = []
     for %list in %lists:
-        for %item in %list: add %item to %flat
+        for %item in %list: %flat::add %item
     return %flat
 
 test:
@@ -240,7 +240,7 @@ action [unique %items]:
     %seen = {}
     for % in %items:
         unless %seen.%:
-            add % to %unique
+            %unique::add %
             %seen.% = (yes)
     
     return %unique
diff --git a/core/control_flow.nom b/core/control_flow.nom
index 95b9bcb..63601f7 100644
--- a/core/control_flow.nom
+++ b/core/control_flow.nom
@@ -172,19 +172,19 @@ compile [===next %var ===, ---next %var ---, ***next %var ***] to (..)
 
 test:
     %nums = []
-    for %x in 1 to 5: add %x to %nums
+    for %x in 1 to 5: %nums::add %x
     assume (%nums == [1, 2, 3, 4, 5])
     %nums = []
-    for %x in 1 to 5 via 2: add %x to %nums
+    for %x in 1 to 5 via 2: %nums::add %x
     assume (%nums == [1, 3, 5])
     %nums = []
     for %outer in 1 to 100:
         for %inner in %outer to (%outer + 2):
             if (%inner == 2):
-                add -2 to %nums
+                %nums::add -2
                 do next %inner
             
-            add %inner to %nums
+            %nums::add %inner
             if (%inner == 5): stop %outer
     
     assume (%nums == [1, -2, 3, -2, 3, 4, 3, 4, 5])
@@ -227,13 +227,13 @@ parse [for %var in %start to %stop %body] as (..)
 test:
     %a = [10, 20, 30, 40, 50]
     %b = []
-    for %x in %a: add %x to %b
+    for %x in %a: %b::add %x
     assume (%a == %b)
     %b = []
     for %x in %a:
         if (%x == 10): do next %x
         if (%x == 50): stop %x
-        add %x to %b
+        %b::add %x
     
     assume (%b == [20, 30, 40])
 
@@ -268,7 +268,7 @@ test:
     for %k = %v in %d:
         if (%k == "a"): do next %k
         if (%v == 20): do next %v
-        add "\%k = \%v" to %result
+        %result::add "\%k = \%v"
     
     assume ((%result sorted) == ["c = 30", "d = 40", "e = 50"])
 
@@ -486,7 +486,7 @@ test:
     for % in recursive %t:
         if ((type of %) is "table"):
             for %2 in %: recurse % on %2
-        ..else: add % to %flat
+        ..else: %flat::add %
     
     assume ((sorted %flat) == [1, 2, 3, 4, 5, 6])
 
diff --git a/core/coroutines.nom b/core/coroutines.nom
index 1570ed7..80f3b60 100644
--- a/core/coroutines.nom
+++ b/core/coroutines.nom
@@ -12,7 +12,7 @@ test:
             -> 5
             repeat 3 times: -> 6
     
-    for % in coroutine %co: add % to %nums
+    for % in coroutine %co: %nums::add %
     assume (%nums == [4, 5, 6, 6, 6]) or barf "Coroutine iteration failed"
 compile [coroutine %body, generator %body] to (..)
     Lua value ".."
diff --git a/lib/base64.nom b/lib/base64.nom
index 2b7e22e..fb12319 100644
--- a/lib/base64.nom
+++ b/lib/base64.nom
@@ -21,22 +21,22 @@ action [base64 %str, base64 encode %str, %str base64]:
     %chars = []
     for %i in 1 to (length of %str) via 3:
         %bytes = [=lua "\%str:byte(\%i, \(%i + 2))"]
-        add %b64_str.(((%bytes.1 & 252) >> 2) + 1) to %chars
+        %chars::add %b64_str.(((%bytes.1 & 252) >> 2) + 1)
         if (length of %bytes) is:
             3:
-                add %b64_str.(((%bytes.1 & 3) << 4) + ((%bytes.2 & 240) >> 4) + 1) to %chars
-                add %b64_str.(((%bytes.2 & 15) << 2) + ((%bytes.3 & 192) >> 6) + 1) to %chars
-                add %b64_str.((%bytes.3 & 63) + 1) to %chars
+                %chars::add %b64_str.(((%bytes.1 & 3) << 4) + ((%bytes.2 & 240) >> 4) + 1)
+                %chars::add %b64_str.(((%bytes.2 & 15) << 2) + ((%bytes.3 & 192) >> 6) + 1)
+                %chars::add %b64_str.((%bytes.3 & 63) + 1)
             
             2:
-                add %b64_str.(((%bytes.1 & 3) << 4) + ((%bytes.2 & 240) >> 4) + 1) to %chars
-                add %b64_str.(((%bytes.2 & 15) << 2) + 1) to %chars
-                add "=" to %chars
+                %chars::add %b64_str.(((%bytes.1 & 3) << 4) + ((%bytes.2 & 240) >> 4) + 1)
+                %chars::add %b64_str.(((%bytes.2 & 15) << 2) + 1)
+                %chars::add "="
             
             1:
-                add %b64_str.(((%bytes.1 & 3) << 4) + 1) to %chars
-                add "=" to %chars
-                add "=" to %chars
+                %chars::add %b64_str.(((%bytes.1 & 3) << 4) + 1)
+                %chars::add "="
+                %chars::add "="
     
     return (%chars joined)
 
@@ -45,10 +45,10 @@ action [decode base64 %str, %str base64 decoded, base64 decode %str]:
     %chars = []
     for %i in 1 to (length of %str) via 4:
         %indices = (%reverse_b64.(%str.%) for % in %i to (%i + 3))
-        add (chr ((%indices.1 << 2) + ((%indices.2 & 48) >> 4))) to %chars
+        %chars::add (chr ((%indices.1 << 2) + ((%indices.2 & 48) >> 4)))
         if (%str.(%i + 2) == "="): stop
-        add (chr (((%indices.2 & 15) << 4) + ((%indices.3 & 60) >> 2))) to %chars
+        %chars::add (chr (((%indices.2 & 15) << 4) + ((%indices.3 & 60) >> 2)))
         if (%str.(%i + 3) == "="): stop
-        add (chr (((%indices.3 & 3) << 6) + %indices.4)) to %chars
+        %chars::add (chr (((%indices.3 & 3) << 6) + %indices.4))
     
     return (%chars joined)
diff --git a/nomsu_compiler.lua b/nomsu_compiler.lua
index 2cda146..4855476 100644
--- a/nomsu_compiler.lua
+++ b/nomsu_compiler.lua
@@ -125,7 +125,18 @@ local _list_mt = {
       end
     end
     return true
-  end
+  end,
+  __index = {
+    add_1 = insert,
+    append_1 = insert,
+    add_1_at_index_2 = function(t, x, i)
+      return insert(t, i, x)
+    end,
+    at_index_1_add_2 = insert,
+    pop = table.remove,
+    remove_last = table.remove,
+    remove_index_1 = table.remove
+  }
 }
 local list
 list = function(t)
diff --git a/nomsu_compiler.moon b/nomsu_compiler.moon
index e05c209..5ac6a87 100644
--- a/nomsu_compiler.moon
+++ b/nomsu_compiler.moon
@@ -80,6 +80,14 @@ _list_mt =
             elseif @[i] < other[i] then return true
             elseif @[i] > other[i] then return false
         return true
+    __index:
+        add_1: insert
+        append_1: insert
+        add_1_at_index_2: (t,x,i)-> insert(t,i,x)
+        at_index_1_add_2: insert
+        pop: table.remove
+        remove_last: table.remove
+        remove_index_1: table.remove
 
 list = (t)-> setmetatable(t, _list_mt)
 
diff --git a/tools/autoformat.nom b/tools/autoformat.nom
index 6c4420a..719b826 100755
--- a/tools/autoformat.nom
+++ b/tools/autoformat.nom
@@ -11,7 +11,7 @@ use "lib/os.nom"
 %inplace = (no)
 if (%args.1 is "-i"):
     %inplace = (yes)
-    remove index 1 from %args
+    %args::remove index 1
 
 for %path in %args:
     for file %filename in %path:
diff --git a/tools/replace.nom b/tools/replace.nom
index 4557c2c..3140675 100755
--- a/tools/replace.nom
+++ b/tools/replace.nom
@@ -11,14 +11,14 @@ use "lib/os.nom"
 %inplace = (no)
 if (%args.1 is "-i"):
     %inplace = (yes)
-    remove index 1 from %args
+    %args::remove index 1
 
 if ((length of %args) < 3):
     say "Usage: nomsu tools/replace.nom [-i] tree_to_replace replacement files..."
     lua> "os.exit(1)"
 
-%pattern = (parse (remove index 1 from %args))
-%replacement = (parse (remove index 1 from %args))
+%pattern = (parse (%args::remove index 1))
+%replacement = (parse (%args::remove index 1))
 for %path in %args:
     for file %filename in %path:
         unless (any [%filename matches "%.nom$", %filename == "-", %filename == "stdin"]):
@@ -28,7 +28,7 @@ for %path in %args:
         if (%tree2 == %tree):
             say "No changes in \%filename"
             do next %filename
-
+        
         %text = ".."
             #!/usr/bin/env nomsu -V\(%tree.version or (Nomsu version))
             \(%tree2 as nomsu)
@@ -37,4 +37,5 @@ for %path in %args:
             %inplace:
                 say "Replaced in \%filename"
                 write %text to file %filename
+            
             else: say %text
diff --git a/tools/test.nom b/tools/test.nom
index 7a1ee1e..2446069 100755
--- a/tools/test.nom
+++ b/tools/test.nom
@@ -8,7 +8,7 @@ use "lib/consolecolor.nom"
 
 %args = (command line args)
 if (%args.1 == "-v"):
-    remove index 1 from %args
+    %args::remove index 1
     %verbose = (yes)
 
 # Make sure all the files get run
@@ -24,7 +24,7 @@ for %path in (command line args):
         %file_tests = []
         for %src = %test in %tests:
             if (%src.filename == %filename):
-                add {test:%test, source:%src} to %file_tests
+                %file_tests::add {test:%test, source:%src}
         
         unless (%file_tests is empty):
             sort %file_tests by % -> %.source
diff --git a/tools/upgrade.nom b/tools/upgrade.nom
index c74b8e7..4676f77 100755
--- a/tools/upgrade.nom
+++ b/tools/upgrade.nom
@@ -12,12 +12,12 @@ use "lib/os.nom"
 %inplace = (no)
 if (%args.1 is "-i"):
     %inplace = (yes)
-    remove index 1 from %args
+    %args::remove index 1
 
 if (%args.1 is "-t"):
     use "lib/consolecolor.nom"
     %test = (yes)
-    remove index 1 from %args
+    %args::remove index 1
 
 for %path in %args:
     for file %filename in %path: