diff --git a/4coder_custom.cpp b/4coder_custom.cpp
index 99ca7c7c..3cd8b864 100644
--- a/4coder_custom.cpp
+++ b/4coder_custom.cpp
@@ -57,8 +57,8 @@ bool str_match(const char *a, int len_a, const char *b, int len_b){
 HOOK_SIG(my_file_settings){
      Buffer_Summary buffer = app->get_active_buffer(cmd_context);
 
-     // NOTE(allen|a3.4.2): Whenever you ask for a buffer, you should check that the
-     // exists flag is set to true before using it.  Reasons why the buffer might not exist:
+     // NOTE(allen|a3.4.2): Whenever you ask for a buffer, you should first check that
+     // the exists field is set to true.  Reasons why the buffer might not exist:
      //   -The active panel does not contain a buffer and get_active_buffer was used
      //   -The index provided to get_buffer was out of range [0,max) or that index is associated to a dummy buffer
      //   -The name provided to get_buffer_by_name did not match any of the existing buffers
@@ -81,6 +81,19 @@ HOOK_SIG(my_file_settings){
      }
 }
 
+CUSTOM_COMMAND_SIG(write_increment){
+    Buffer_Summary buffer = app->get_active_buffer(cmd_context);
+    
+    // NOTE(allen|a3.4.2): In addition to checking whether the buffer exists after a query,
+    // if you're going to read from or write to the buffer, you should check ready.  A buffer
+    // is usually ready, but when a buffer has just been opened it is possible that the contents
+    // haven't been filled yet.  If the buffer is not ready trying to read or write it is invalid.
+    // (See my_file_settings for comments on the exists field).
+    if (buffer.exists && buffer.ready){
+        app->buffer_replace_range(cmd_context, &buffer, buffer.file_cursor_pos, buffer.file_cursor_pos, "++", 2);
+    }
+}
+
 CUSTOM_COMMAND_SIG(open_in_other){
     exec_command(cmd_context, cmdid_change_active_panel);
     exec_command(cmd_context, cmdid_interactive_open);
@@ -264,6 +277,8 @@ extern "C" GET_BINDING_DATA(get_bindings){
     bind(context, '\n', MDFR_SHIFT, write_and_auto_tab);
     bind(context, ' ', MDFR_SHIFT, cmdid_write_character);
     
+    bind(context, '=', MDFR_CTRL, write_increment);
+    
     end_map(context);
     
     
diff --git a/4coder_custom.h b/4coder_custom.h
index 9250dd4b..338a4d0b 100644
--- a/4coder_custom.h
+++ b/4coder_custom.h
@@ -276,7 +276,6 @@ extern "C"{
 
 #define BUFFER_SEEK_DELIMITER_SIG(name) int name(void *cmd_context, Buffer_Summary *buffer, int start, char delim, int *out)
 #define BUFFER_READ_RANGE_SIG(name) int name(void *cmd_context, Buffer_Summary *buffer, int start, int end, char *out)
-
 #define BUFFER_REPLACE_RANGE_SIG(name) int name(void *cmd_context, Buffer_Summary *buffer, int start, int end, char *str, int len)
 
 extern "C"{
@@ -299,7 +298,6 @@ extern "C"{
     
     typedef BUFFER_SEEK_DELIMITER_SIG(Buffer_Seek_Delimiter_Function);
     typedef BUFFER_READ_RANGE_SIG(Buffer_Read_Range_Function);
-    
     typedef BUFFER_REPLACE_RANGE_SIG(Buffer_Replace_Range_Function);
 }
 
@@ -323,7 +321,6 @@ struct Application_Links{
     
     Buffer_Seek_Delimiter_Function *buffer_seek_delimiter;
     Buffer_Read_Range_Function *buffer_read_range;
-    
     Buffer_Replace_Range_Function *buffer_replace_range;
 };
 
diff --git a/4ed.cpp b/4ed.cpp
index e6f38eb4..669af5ba 100644
--- a/4ed.cpp
+++ b/4ed.cpp
@@ -2012,7 +2012,8 @@ globalvar Command_Function command_table[cmdid_count];
 internal void
 fill_buffer_summary(Buffer_Summary *buffer, Editing_File *file, Working_Set *working_set){
     buffer->exists = 1;
-    buffer->exists = file_is_ready(file);
+    buffer->ready = file_is_ready(file);
+    buffer->is_lexed = file->settings.tokens_exist;
     buffer->file_id = (int)(file - working_set->files);
     buffer->size = file->state.buffer.size;
     buffer->file_cursor_pos = file->state.cursor_pos;
@@ -2022,7 +2023,6 @@ fill_buffer_summary(Buffer_Summary *buffer, Editing_File *file, Working_Set *wor
     buffer->file_name = file->name.source_path.str;
     buffer->buffer_name = file->name.live_name.str;
 
-    buffer->is_lexed = file->settings.tokens_exist;
     buffer->map_id = file->settings.base_map_id;
 }
 
@@ -2250,10 +2250,18 @@ app_links_init(System_Functions *system){
     app_links.directory_has_file = system->directory_has_file;
     app_links.directory_cd = system->directory_cd;
     
+    app_links.get_buffer_max_index = external_get_buffer_max_index;
+    app_links.get_buffer = external_get_buffer;
+    app_links.get_buffer_by_name = external_get_buffer_by_name;
+    
     app_links.get_buffer_max_index = external_get_buffer_max_index;
     app_links.get_buffer = external_get_buffer;
     app_links.get_active_buffer = external_get_active_buffer;
     app_links.get_buffer_by_name = external_get_buffer_by_name;
+    
+    app_links.buffer_seek_delimiter = external_buffer_seek_delimiter;
+    app_links.buffer_read_range = external_buffer_read_range;
+    app_links.buffer_replace_range = external_buffer_replace_range;
 }
 
 #if FRED_INTERNAL