diff --git a/mode/system.py b/mode/system.py
new file mode 100755
index 00000000000..f8eb0d548c9
--- /dev/null
+++ b/mode/system.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python2
+
+import sys
+import argparse
+import platform
+import itertools
+
+
+PLATFORM_CXX_FLAGS = {
+    'linux': {
+        'release': ['//tools/buckconfigs/linux-x86_64/toolchain/ubuntu-18.04-clang.bcfg', '//tools/buckconfigs/linux-x86_64/type/release.bcfg', '//tools/buckconfigs/linux-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+        'debug': ['//tools/buckconfigs/linux-x86_64/toolchain/ubuntu-18.04-clang.bcfg', '//tools/buckconfigs/linux-x86_64/type/debug.bcfg', '//tools/buckconfigs/linux-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+    },
+    'freebsd': {
+        'release': ['//tools/buckconfigs/freebsd-x86_64/toolchain/freebsd-11.2-clang.bcfg', '//tools/buckconfigs/freebsd-x86_64/type/release.bcfg', '//tools/buckconfigs/freebsd-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+        'debug': ['//tools/buckconfigs/freebsd-x86_64/toolchain/freebsd-11.2-clang.bcfg', '//tools/buckconfigs/freebsd-x86_64/type/debug.bcfg', '//tools/buckconfigs/freebsd-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+    },
+    'darwin': {
+        'release': ['//tools/buckconfigs/macos-x86_64/type/release.bcfg', '//tools/buckconfigs/macos-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+        'debug': ['//tools/buckconfigs/macos-x86_64/type/debug.bcfg', '//tools/buckconfigs/macos-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+    },
+    'windows': {
+        'release': ['//tools/buckconfigs/windows-x86_64/toolchain/vs2017_15.5.bcfg', '//tools/buckconfigs/windows-x86_64/type/release.bcfg', '//tools/buckconfigs/windows-x86_64/python/default.bcfg', '//tools/buckconfigs/windows-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+        'debug': ['//tools/buckconfigs/windows-x86_64/toolchain/vs2017_15.5.bcfg', '//tools/buckconfigs/windows-x86_64/type/debug.bcfg', '//tools/buckconfigs/windows-x86_64/python/default.bcfg', '//tools/buckconfigs/windows-x86_64/base.bcfg', '//tools/buckconfigs/base.bcfg'],
+    },
+}
+
+SUPPORTED_FLAVORS = {e for entry in PLATFORM_CXX_FLAGS.values() for e in entry}
+
+
+def generate(flavors):
+    osType, _, _, _, _, _ = platform.uname()
+    osType = osType.lower()
+    if osType not in PLATFORM_CXX_FLAGS:
+        raise Exception('Platform {} not supported!'.format(osType))
+    return itertools.chain.from_iterable([PLATFORM_CXX_FLAGS[osType][flavor] for flavor in flavors])
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Automatically set the proper config files for buck. This is selected based on the platform')
+    parser.add_argument('--flavors', dest='flavors', action='store', type=str, help='comma seperated list of flavors. Currently supported: release and debug')
+
+    if len(sys.argv) == 1:
+        parser.print_help(sys.stderr)
+        sys.exit(1)
+
+    args = parser.parse_args()
+    flavors = {flavor.lower() for flavor in args.flavors.split(',')}
+    if len(flavors - SUPPORTED_FLAVORS) > 0:
+        print('Invalid flavors were given: {}\n'.format(','.join(flavors - SUPPORTED_FLAVORS)))
+        parser.print_help(sys.stderr)
+    else:
+        configs = ['--config-file\n{}'.format(config) for config in generate(flavors)]
+        print('\n'.join(configs))