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diff --git a/lib/yahns.rb b/lib/yahns.rb
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+# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net> and all contributors
+# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+require 'unicorn' # pulls in raindrops, kgio, fcntl, etc, stringio, and logger
+require 'sleepy_penguin'
+
+# yahns exposes no user-visible API outside of the config file
+# Internals are subject to change.
+module Yahns # :nodoc:
+  # We populate this at startup so we can figure out how to reexecute
+  # and upgrade the currently running instance of yahns
+  # Unlike unicorn, this Hash is NOT a stable/public interface.
+  #
+  # * 0 - the path to the yahns executable
+  # * :argv - a deep copy of the ARGV array the executable originally saw
+  # * :cwd - the working directory of the application, this is where
+  # you originally started yahns.
+  #
+  # To change your yahns executable to a different path without downtime,
+  # you can set the following in your yahns config file, HUP and then
+  # continue with the traditional USR2 + QUIT upgrade steps:
+  #
+  #   Yahns::START[0] = "/home/bofh/2.0.0/bin/yahns"
+  START = {
+    :argv => ARGV.map { |arg| arg.dup },
+    0 => $0.dup,
+  }
+
+  # We favor ENV['PWD'] since it is (usually) symlink aware for Capistrano
+  # and like systems
+  START[:cwd] = begin
+    a = File.stat(pwd = ENV['PWD'])
+    b = File.stat(Dir.pwd)
+    a.ino == b.ino && a.dev == b.dev ? pwd : Dir.pwd
+  rescue
+    Dir.pwd
+  end
+
+  # Raised inside TeeInput when a client closes the socket inside the
+  # application dispatch.  This is always raised with an empty backtrace
+  # since there is nothing in the application stack that is responsible
+  # for client shutdowns/disconnects.
+  class ClientShutdown < EOFError # :nodoc:
+  end
+end
+
+# FIXME: require lazily
+require_relative 'yahns/log'
+require_relative 'yahns/queue_epoll'
+require_relative 'yahns/stream_input'
+require_relative 'yahns/tee_input'
+require_relative 'yahns/queue_egg'
+require_relative 'yahns/client_expire'
+require_relative 'yahns/http_response'
+require_relative 'yahns/http_client'
+require_relative 'yahns/http_context'
+require_relative 'yahns/queue'
+require_relative 'yahns/config'
+require_relative 'yahns/tmpio'
+require_relative 'yahns/worker'
+require_relative 'yahns/sigevent'
+require_relative 'yahns/daemon'
+require_relative 'yahns/socket_helper'
+require_relative 'yahns/server'
+require_relative 'yahns/fdmap'
+require_relative 'yahns/acceptor'
+require_relative 'yahns/wbuf'