Did we miss any features you like? Did we skip over any breaking changes you found? Feel free to document them below.

• We've dropped v0.10 support. It should still work for now, but we'll only be fixing easy fixes for bugs on that platform. Some new features are not available on v0.10.
• All commands now return string-like objects (called ShellStrings), instead of regular JavaScript strings. The new ShellString type means we no longer have to modify the global String.prototype (See #159). If you need to pass the output of a ShellJS command to a non-ShellJS function, use .toString(). Ex. if(fs.existsSync(which('git').toString())) { ... }
  • Regular strings don't have the .to() and .toEnd() methods anymore. You should convert them to the ShellString type: ShellString('this is a regular string').to('file1.txt'). Using strings currently still works for require('shelljs/global'), but this is deprecated, and we suggest you switch to using ShellStrings instead.
  • exec() used to return an object with the .output attribute. exec() now returns a ShellString, so .output has been permanently replaced with .stdout.
  • shell.exec(cmd).stdout.to('file.txt') used to work. Now you should use shell.exec(cmd).to('file.txt') instead.
• Bash compat: cp() has changed slightly when handling directories. It used to copy all the contents of a directory (not the directory itself), but now it copies the directory too. So cp('src/', 'dest/') creates dest/src/. If you need the old behavior back, try cp('src/*', 'dest/').

• Support for pipes! Try out grep('foo', 'file1.txt').sed(/o/g, 'a').to('file2.txt')
• Bash compat: Globbing available on all commands!
• Bash compat: Glob semantics and support are more consistent with Bash, now that we've switched the glob module
• Since all commands output ShellString objects, now you can check .stdout, .stderr, & .code attributes on the return value just like you could do before with exec(). Try: echo(cd('fake directory').stderr, ls('fake file').code)
• Bash compat: More consistent handling of symlinks, along with the -L and -P flags for cp().