diff --git a/src/common/aliases/aliases.h b/src/common/aliases/aliases.h
index 509a7c8..237f552 100644
--- a/src/common/aliases/aliases.h
+++ b/src/common/aliases/aliases.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef ALIASES_H
 #define ALIASES_H
 
diff --git a/src/common/misc/misc_utils.h b/src/common/misc/misc_utils.h
index dbaa140..07fcd88 100644
--- a/src/common/misc/misc_utils.h
+++ b/src/common/misc/misc_utils.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MISC_UTILS_H
 #define MISC_UTILS_H
 
diff --git a/src/common/platform/platform.h b/src/common/platform/platform.h
index 3e50bc3..c6796a7 100644
--- a/src/common/platform/platform.h
+++ b/src/common/platform/platform.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef PLATFORM_H
 #define PLATFORM_H
 
diff --git a/src/common/wapp_common.h b/src/common/wapp_common.h
index ee3da4e..583ff4e 100644
--- a/src/common/wapp_common.h
+++ b/src/common/wapp_common.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_COMMON_H
 #define WAPP_COMMON_H
 
diff --git a/src/core/mem/arena/mem_arena.c b/src/core/mem/arena/mem_arena.c
index 5e15981..50f1078 100644
--- a/src/core/mem/arena/mem_arena.c
+++ b/src/core/mem/arena/mem_arena.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "mem_arena.h"
 #include "../utils/mem_utils.h"
 #include "../../../common/aliases/aliases.h"
diff --git a/src/core/mem/arena/mem_arena.h b/src/core/mem/arena/mem_arena.h
index f3ae1ce..e72a676 100644
--- a/src/core/mem/arena/mem_arena.h
+++ b/src/core/mem/arena/mem_arena.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_ARENA_H
 #define MEM_ARENA_H
 
diff --git a/src/core/mem/arena/mem_arena_allocator.c b/src/core/mem/arena/mem_arena_allocator.c
index 398b185..4ac0a29 100644
--- a/src/core/mem/arena/mem_arena_allocator.c
+++ b/src/core/mem/arena/mem_arena_allocator.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "mem_arena_allocator.h"
 #include "mem_arena.h"
 #include "../../../common/aliases/aliases.h"
diff --git a/src/core/mem/arena/mem_arena_allocator.h b/src/core/mem/arena/mem_arena_allocator.h
index f6ebd4f..7fb84c7 100644
--- a/src/core/mem/arena/mem_arena_allocator.h
+++ b/src/core/mem/arena/mem_arena_allocator.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_ARENA_ALLOCATOR_H
 #define MEM_ARENA_ALLOCATOR_H
 
diff --git a/src/core/mem/utils/mem_utils.c b/src/core/mem/utils/mem_utils.c
index c95f50f..85561c6 100644
--- a/src/core/mem/utils/mem_utils.c
+++ b/src/core/mem/utils/mem_utils.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "mem_utils.h"
 #include "../../../common/aliases/aliases.h"
 #include <stdbool.h>
diff --git a/src/core/mem/utils/mem_utils.h b/src/core/mem/utils/mem_utils.h
index 5575fe4..8bb1e2f 100644
--- a/src/core/mem/utils/mem_utils.h
+++ b/src/core/mem/utils/mem_utils.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_UTILS_H
 #define MEM_UTILS_H
 
diff --git a/src/core/os/cpath/cpath.c b/src/core/os/cpath/cpath.c
index 9bebd6b..dd895b5 100644
--- a/src/core/os/cpath/cpath.c
+++ b/src/core/os/cpath/cpath.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "cpath.h"
 #include "../../../common/aliases/aliases.h"
 #include "../../../common/misc/misc_utils.h"
diff --git a/src/core/os/cpath/cpath.h b/src/core/os/cpath/cpath.h
index 7f648b8..68a24ce 100644
--- a/src/core/os/cpath/cpath.h
+++ b/src/core/os/cpath/cpath.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef CPATH_H
 #define CPATH_H
 
diff --git a/src/core/os/mem/mem_os.c b/src/core/os/mem/mem_os.c
index 187fe26..9e3ee04 100644
--- a/src/core/os/mem/mem_os.c
+++ b/src/core/os/mem/mem_os.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "mem_os.h"
 #include "mem_os_ops.h"
 #include "../../../common/aliases/aliases.h"
diff --git a/src/core/os/mem/mem_os.h b/src/core/os/mem/mem_os.h
index fa0dae7..77535bc 100644
--- a/src/core/os/mem/mem_os.h
+++ b/src/core/os/mem/mem_os.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_OS_H
 #define MEM_OS_H
 
diff --git a/src/core/os/mem/mem_os_ops.h b/src/core/os/mem/mem_os_ops.h
index 8916915..04d8e2c 100644
--- a/src/core/os/mem/mem_os_ops.h
+++ b/src/core/os/mem/mem_os_ops.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_OS_OPS_H
 #define MEM_OS_OPS_H
 
diff --git a/src/core/os/mem/posix/mem_os_posix.c b/src/core/os/mem/posix/mem_os_posix.c
index fa1e290..ad51372 100644
--- a/src/core/os/mem/posix/mem_os_posix.c
+++ b/src/core/os/mem/posix/mem_os_posix.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../common/aliases/aliases.h"
 #include "../../../../common/platform/platform.h"
 
diff --git a/src/core/os/mem/posix/mem_os_posix.h b/src/core/os/mem/posix/mem_os_posix.h
index 00bd1d5..f93c3e2 100644
--- a/src/core/os/mem/posix/mem_os_posix.h
+++ b/src/core/os/mem/posix/mem_os_posix.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_OS_POSIX_H
 #define MEM_OS_POSIX_H
 
diff --git a/src/core/os/mem/win/mem_os_win.c b/src/core/os/mem/win/mem_os_win.c
index 3884901..78ce0c9 100644
--- a/src/core/os/mem/win/mem_os_win.c
+++ b/src/core/os/mem/win/mem_os_win.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../common/aliases/aliases.h"
 #include "../../../../common/platform/platform.h"
 
diff --git a/src/core/os/mem/win/mem_os_win.h b/src/core/os/mem/win/mem_os_win.h
index 2d2cf5e..1af2557 100644
--- a/src/core/os/mem/win/mem_os_win.h
+++ b/src/core/os/mem/win/mem_os_win.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_OS_WIN_H
 #define MEM_OS_WIN_H
 
diff --git a/src/core/os/shell/commander/commander.c b/src/core/os/shell/commander/commander.c
index ad83c18..3420582 100644
--- a/src/core/os/shell/commander/commander.c
+++ b/src/core/os/shell/commander/commander.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "commander.h"
 #include "commander_output.h"
 #include "../utils/shell_utils.h"
diff --git a/src/core/os/shell/commander/commander.h b/src/core/os/shell/commander/commander.h
index 8cbaa78..f7e6e0c 100644
--- a/src/core/os/shell/commander/commander.h
+++ b/src/core/os/shell/commander/commander.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef COMMANDER_H
 #define COMMANDER_H
 
diff --git a/src/core/os/shell/commander/commander_output.h b/src/core/os/shell/commander/commander_output.h
index e4cdfe2..d24577a 100644
--- a/src/core/os/shell/commander/commander_output.h
+++ b/src/core/os/shell/commander/commander_output.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef COMMANDER_OUTPUT_H
 #define COMMANDER_OUTPUT_H
 
diff --git a/src/core/os/shell/commander/posix/commander_posix.c b/src/core/os/shell/commander/posix/commander_posix.c
index 0719c5c..77452f8 100644
--- a/src/core/os/shell/commander/posix/commander_posix.c
+++ b/src/core/os/shell/commander/posix/commander_posix.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../../common/aliases/aliases.h"
 #include "../../../../../common/platform/platform.h"
 
diff --git a/src/core/os/shell/commander/win/commander_win.c b/src/core/os/shell/commander/win/commander_win.c
index 843ab0e..78ad793 100644
--- a/src/core/os/shell/commander/win/commander_win.c
+++ b/src/core/os/shell/commander/win/commander_win.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../../common/aliases/aliases.h"
 #include "../../../../../common/platform/platform.h"
 
diff --git a/src/core/os/shell/termcolour/posix/termcolour_posix.c b/src/core/os/shell/termcolour/posix/termcolour_posix.c
index 42524b1..349cfd3 100644
--- a/src/core/os/shell/termcolour/posix/termcolour_posix.c
+++ b/src/core/os/shell/termcolour/posix/termcolour_posix.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../../common/aliases/aliases.h"
 #include "../../../../../common/platform/platform.h"
 #include "../../../../../primitives/strings/str8/str8.h"
diff --git a/src/core/os/shell/termcolour/termcolour.c b/src/core/os/shell/termcolour/termcolour.c
index e96c04b..846151f 100644
--- a/src/core/os/shell/termcolour/termcolour.c
+++ b/src/core/os/shell/termcolour/termcolour.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "termcolour.h"
 #include "terminal_colours.h"
 #include "../../../../primitives/strings/str8/str8.h"
diff --git a/src/core/os/shell/termcolour/termcolour.h b/src/core/os/shell/termcolour/termcolour.h
index 15f8856..e443532 100644
--- a/src/core/os/shell/termcolour/termcolour.h
+++ b/src/core/os/shell/termcolour/termcolour.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef TERM_COLOUR_H
 #define TERM_COLOUR_H
 
diff --git a/src/core/os/shell/termcolour/terminal_colours.h b/src/core/os/shell/termcolour/terminal_colours.h
index e404b94..92f468b 100644
--- a/src/core/os/shell/termcolour/terminal_colours.h
+++ b/src/core/os/shell/termcolour/terminal_colours.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef TERMINAL_COLOURS_H
 #define TERMINAL_COLOURS_H
 
diff --git a/src/core/os/shell/termcolour/win/termcolour_win.c b/src/core/os/shell/termcolour/win/termcolour_win.c
index d10c7fa..7b2ee97 100644
--- a/src/core/os/shell/termcolour/win/termcolour_win.c
+++ b/src/core/os/shell/termcolour/win/termcolour_win.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "../../../../../common/aliases/aliases.h"
 #include "../../../../../common/platform/platform.h"
 #include "../../../../../primitives/strings/str8/str8.h"
diff --git a/src/core/os/shell/utils/shell_utils.h b/src/core/os/shell/utils/shell_utils.h
index e00c0e2..315d21d 100644
--- a/src/core/os/shell/utils/shell_utils.h
+++ b/src/core/os/shell/utils/shell_utils.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef SHELL_UTILS_H
 #define SHELL_UTILS_H
 
diff --git a/src/core/wapp_core.c b/src/core/wapp_core.c
index a266f1e..34d8bcb 100644
--- a/src/core/wapp_core.c
+++ b/src/core/wapp_core.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_CORE_C
 #define WAPP_CORE_C
 
diff --git a/src/core/wapp_core.h b/src/core/wapp_core.h
index 885c029..54320cd 100644
--- a/src/core/wapp_core.h
+++ b/src/core/wapp_core.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_CORE_H
 #define WAPP_CORE_H
 
diff --git a/src/primitives/mem_allocator/mem_allocator.c b/src/primitives/mem_allocator/mem_allocator.c
index 6d195d0..412d451 100644
--- a/src/primitives/mem_allocator/mem_allocator.c
+++ b/src/primitives/mem_allocator/mem_allocator.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "mem_allocator.h"
 #include "../../common/aliases/aliases.h"
 #include <stdlib.h>
diff --git a/src/primitives/mem_allocator/mem_allocator.h b/src/primitives/mem_allocator/mem_allocator.h
index 6bb15f3..6d2828d 100644
--- a/src/primitives/mem_allocator/mem_allocator.h
+++ b/src/primitives/mem_allocator/mem_allocator.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef MEM_ALLOCATOR_H
 #define MEM_ALLOCATOR_H
 
diff --git a/src/primitives/strings/str8/str8.c b/src/primitives/strings/str8/str8.c
index 026c562..25152db 100644
--- a/src/primitives/strings/str8/str8.c
+++ b/src/primitives/strings/str8/str8.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "str8.h"
 #include "../../../common/aliases/aliases.h"
 #include "../../mem_allocator/mem_allocator.h"
diff --git a/src/primitives/strings/str8/str8.h b/src/primitives/strings/str8/str8.h
index 390e8e4..26a06dd 100644
--- a/src/primitives/strings/str8/str8.h
+++ b/src/primitives/strings/str8/str8.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef STR8_H
 #define STR8_H
 
diff --git a/src/primitives/wapp_primitives.c b/src/primitives/wapp_primitives.c
index b9885d8..1e3e4a3 100644
--- a/src/primitives/wapp_primitives.c
+++ b/src/primitives/wapp_primitives.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRIMITIVES_C
 #define WAPP_PRIMITIVES_C
 
diff --git a/src/primitives/wapp_primitives.h b/src/primitives/wapp_primitives.h
index 6642c41..7c72ee8 100644
--- a/src/primitives/wapp_primitives.h
+++ b/src/primitives/wapp_primitives.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRIMITIVES_H
 #define WAPP_PRIMITIVES_H
 
diff --git a/src/prng/wapp_prng.c b/src/prng/wapp_prng.c
index 1cfd8f0..e5081be 100644
--- a/src/prng/wapp_prng.c
+++ b/src/prng/wapp_prng.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRNG_C
 #define WAPP_PRNG_C
 
diff --git a/src/prng/wapp_prng.h b/src/prng/wapp_prng.h
index ec5aa96..e64dfac 100644
--- a/src/prng/wapp_prng.h
+++ b/src/prng/wapp_prng.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_PRNG_H
 #define WAPP_PRNG_H
 
diff --git a/src/prng/xorshift/xorshift.c b/src/prng/xorshift/xorshift.c
index 8574dd7..3bf4369 100644
--- a/src/prng/xorshift/xorshift.c
+++ b/src/prng/xorshift/xorshift.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "xorshift.h"
 #include "../../common/aliases/aliases.h"
 #include "../../common/platform/platform.h"
diff --git a/src/prng/xorshift/xorshift.h b/src/prng/xorshift/xorshift.h
index 621fa93..768d925 100644
--- a/src/prng/xorshift/xorshift.h
+++ b/src/prng/xorshift/xorshift.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef XORSHIFT_H
 #define XORSHIFT_H
 
diff --git a/src/testing/tester/tester.c b/src/testing/tester/tester.c
index c00e84c..48b38f7 100644
--- a/src/testing/tester/tester.c
+++ b/src/testing/tester/tester.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "tester.h"
 #include "../../common/aliases/aliases.h"
 #include "../../core/os/shell/termcolour/termcolour.h"
diff --git a/src/testing/tester/tester.h b/src/testing/tester/tester.h
index b9d346c..82bf8f8 100644
--- a/src/testing/tester/tester.h
+++ b/src/testing/tester/tester.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef TESTER_H
 #define TESTER_H
 
diff --git a/src/testing/wapp_testing.c b/src/testing/wapp_testing.c
index 41e0156..2bab834 100644
--- a/src/testing/wapp_testing.c
+++ b/src/testing/wapp_testing.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_TESTING_C
 #define WAPP_TESTING_C
 
diff --git a/src/testing/wapp_testing.h b/src/testing/wapp_testing.h
index 433c28a..a9643ce 100644
--- a/src/testing/wapp_testing.h
+++ b/src/testing/wapp_testing.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_TESTING_H
 #define WAPP_TESTING_H
 
diff --git a/src/uuid/uuid.c b/src/uuid/uuid.c
index 781c0e6..2fe0997 100644
--- a/src/uuid/uuid.c
+++ b/src/uuid/uuid.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #include "uuid.h"
 #include "../common/aliases/aliases.h"
 #include "../primitives/strings/str8/str8.h"
diff --git a/src/uuid/uuid.h b/src/uuid/uuid.h
index fafb632..ca970a9 100644
--- a/src/uuid/uuid.h
+++ b/src/uuid/uuid.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef UUID_H
 #define UUID_H
 
diff --git a/src/uuid/wapp_uuid.c b/src/uuid/wapp_uuid.c
index f68dea3..426132b 100644
--- a/src/uuid/wapp_uuid.c
+++ b/src/uuid/wapp_uuid.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_UUID_C
 #define WAPP_UUID_C
 
diff --git a/src/uuid/wapp_uuid.h b/src/uuid/wapp_uuid.h
index 86aabcf..83f29df 100644
--- a/src/uuid/wapp_uuid.h
+++ b/src/uuid/wapp_uuid.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_UUID_H
 #define WAPP_UUID_H
 
diff --git a/src/wapp.c b/src/wapp.c
index 54caf06..67f2482 100644
--- a/src/wapp.c
+++ b/src/wapp.c
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_C
 #define WAPP_C
 
diff --git a/src/wapp.h b/src/wapp.h
index d8dbc8b..e2c83f1 100644
--- a/src/wapp.h
+++ b/src/wapp.h
@@ -1,3 +1,5 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
 #ifndef WAPP_H
 #define WAPP_H