Programmer's Shift Keys: Remapping shift keys + modifiers to parens, brackets and braces.

private.xml

<?xml version="1.0"?>
<root>
    <item>
        <name>Programmer's Shift Keys</name>
        <!--
         Author: Carwin Young (@carwin)
         Edited by Simon Welker (@chipf0rk)
         Last Updated: 2015-02-18
         v.1.2
         
         Programmer's Shift Keys
         A private.xml for Karabiner (formerly KeyRemap4MacBook)
         
         This private.xml file can be either chopped up for copy-pasting, or
         used alone and modified if you don't already have your own file.
         If you want to use it, add this file to
         ~/Library/Application\ Support/KeyRemap4MacBook/
         
         Options:
         - Parens:     Maps individual strokes of the Shift keys to their
         respective parenthesis keys.
         - Brackets:   Pairs Command and Shift keys to produce brackets.
         - Braces:     Pairs Option and Shift keys to produce braces.
         
         
         </-->
        <item>
            <name>Parentheses ()</name>
            <!-- Credit for this Parens section goes to Steve Losh: http://stevelosh.com/blog/2012/10/a-modern-space-cadet/ -->
            <appendix>Shifts, when pressed alone, type parentheses.  When used with other keys they're normal shifts.</appendix>
            <identifier>private.shifts_to_parens</identifier>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R | ModifierFlag::NONE, KeyCode::SHIFT_R, KeyCode::KEY_0, ModifierFlag::SHIFT_L</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_L | ModifierFlag::NONE, KeyCode::SHIFT_L, KeyCode::KEY_9, ModifierFlag::SHIFT_R</autogen>
            <!--
             Remap the "rolls" of () and )( because it's too easy to hit one
             before finishing the other, and there's no other reason to be
             pressing both shift keys at once anyway
             -->
            <autogen>--KeyToKey-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_R, KeyCode::KEY_0, ModifierFlag::SHIFT_L, KeyCode::KEY_9, ModifierFlag::SHIFT_L</autogen>
            <autogen>--KeyToKey-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_L, KeyCode::KEY_9, ModifierFlag::SHIFT_L, KeyCode::KEY_0, ModifierFlag::SHIFT_L</autogen>
            <!--
             Remap Rshift+Space to ') ', because when typing an end paren and
             then a space I tend to hit space before I let go of rshift.
             -->
            <autogen>--KeyToKey-- KeyCode::SPACE, ModifierFlag::SHIFT_R, KeyCode::KEY_0, ModifierFlag::SHIFT_L, KeyCode::SPACE</autogen>
            <!--
             Steve also suggests setting the Key Overlaid Modifier Timeout
             setting to a much lower value. I use 200ms.
             -->
        </item>
        <item>
            <name>Brackets []</name>
            <appendix>Remap Command+Shift to brackets.</appendix>
            <identifier>private.shifts_to_brackets</identifier>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R | ModifierFlag::COMMAND_R, KeyCode::BRACKET_RIGHT, ModifierFlag::NONE</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_L | ModifierFlag::COMMAND_R, KeyCode::BRACKET_LEFT, ModifierFlag::NONE</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R | ModifierFlag::COMMAND_L, KeyCode::BRACKET_RIGHT, ModifierFlag::NONE</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_L | ModifierFlag::COMMAND_L, KeyCode::BRACKET_LEFT, ModifierFlag::NONE</autogen>
            <!--
             Another way to do this that I like a lot is to actually map the
             brackets to a SIMULTANEOUS keypress of SHIFT + COMMAND.
             
             <autogen>
             __SimultaneousKeyPresses__
             KeyCode::COMMAND_L, KeyCode::SHIFT_L,
             KeyCode::BRACKET_LEFT,
             Option::SIMULTANEOUSKEYPRESSES_STRICT_KEY_ORDER
             </autogen>
             
             <autogen>
             __SimultaneousKeyPresses__
             KeyCode::COMMAND_R, KeyCode::SHIFT_R,
             KeyCode::BRACKET_RIGHT,
             Option::SIMULTANEOUSKEYPRESSES_STRICT_KEY_ORDER
             </autogen>
             -->
        </item>
        
        <item>
            <name>Braces {}</name>
            <appendix>Remap Option+Shift to braces.</appendix>
            <identifier>private.shifts_to_braces</identifier>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R | ModifierFlag::OPTION_R, KeyCode::BRACKET_RIGHT, ModifierFlag::SHIFT_R</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_L | ModifierFlag::OPTION_R, KeyCode::BRACKET_LEFT, ModifierFlag::SHIFT_L</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R | ModifierFlag::OPTION_L, KeyCode::BRACKET_RIGHT, ModifierFlag::SHIFT_R</autogen>
            <autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_L, ModifierFlag::SHIFT_L | ModifierFlag::OPTION_L, KeyCode::BRACKET_LEFT, ModifierFlag::SHIFT_L</autogen>
        </item>
        
    </item>
</root>