diff --git a/framework/framework_constants.py b/framework/framework_constants.py
new file mode 100644
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--- /dev/null
+++ b/framework/framework_constants.py
@@ -0,0 +1,184 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Some constants used throughout Monorail."""
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import os
+import re
+
+
+# Number of seconds in various periods.
+SECS_PER_MINUTE = 60
+SECS_PER_HOUR = SECS_PER_MINUTE * 60
+SECS_PER_DAY = SECS_PER_HOUR * 24
+SECS_PER_MONTH = SECS_PER_DAY * 30
+SECS_PER_YEAR = SECS_PER_DAY * 365
+
+# When we write to memcache, let the values expire so that we don't
+# get any unexpected super-old values as we make code changes over the
+# years.   Also, searches can contain date terms like [opened<today-1]
+# that would become wrong if cached for a long time.
+CACHE_EXPIRATION = 6 * SECS_PER_HOUR
+
+# Fulltext indexing happens asynchronously and we get no notification
+# when the indexing operation has completed.  So, when we cache searches
+# that use fulltext terms, the results might be stale.  We still do
+# cache them and use the cached values, but we expire them so that the
+# results cannot be stale for a long period of time.
+FULLTEXT_MEMCACHE_EXPIRATION = 3 * SECS_PER_MINUTE
+
+# Size in bytes of the largest form submission that we will accept
+MAX_POST_BODY_SIZE = 10 * 1024 * 1024   # = 10 MB
+
+# Special issue ID to use when an issue is explicitly not specified.
+NO_ISSUE_SPECIFIED = 0
+
+# Special user ID and name to use when no user was specified.
+NO_USER_SPECIFIED = 0
+NO_SESSION_SPECIFIED = 0
+NO_USER_NAME = '----'
+DELETED_USER_NAME = 'a_deleted_user'
+DELETED_USER_ID = 1
+USER_NOT_FOUND_NAME = 'user_not_found'
+
+# Queues for deleting users tasks.
+QUEUE_SEND_WIPEOUT_USER_LISTS = 'wipeoutsendusers'
+QUEUE_FETCH_WIPEOUT_DELETED_USERS = 'wipeoutdeleteusers'
+QUEUE_DELETE_USERS = 'deleteusers'
+
+# We remember the time of each user's last page view, but to reduce the
+# number of database writes, we only update it if it is newer by an hour.
+VISIT_RESOLUTION = 1 * SECS_PER_HOUR
+
+# String to display when some field has no value.
+NO_VALUES = '----'
+
+# If the user enters one or more dashes, that means "no value".  This is useful
+# in bulk edit, inbound email, and commit log command where a blank field
+# means "keep what was there" or is ignored.
+NO_VALUE_RE = re.compile(r'^-+$')
+
+# Used to loosely validate column spec. Mainly guards against malicious input.
+COLSPEC_RE = re.compile(r'^[-.\w\s/]*$', re.UNICODE)
+COLSPEC_COL_RE = re.compile(r'[-.\w/]+', re.UNICODE)
+MAX_COL_PARTS = 25
+MAX_COL_LEN = 50
+
+# Used to loosely validate sort spec. Mainly guards against malicious input.
+SORTSPEC_RE = re.compile(r'^[-.\w\s/]*$', re.UNICODE)
+MAX_SORT_PARTS = 6
+
+# For the artifact search box autosizing when the user types a long query.
+MIN_ARTIFACT_SEARCH_FIELD_SIZE = 38
+MAX_ARTIFACT_SEARCH_FIELD_SIZE = 75
+AUTOSIZE_STEP = 3
+
+# Regular expressions used in parsing label and status configuration text
+IDENTIFIER_REGEX = r'[-.\w]+'
+IDENTIFIER_RE = re.compile(IDENTIFIER_REGEX, re.UNICODE)
+# Labels and status values that are prefixed by a pound-sign are not displayed
+# in autocomplete menus.
+IDENTIFIER_DOCSTRING_RE = re.compile(
+    r'^(#?%s)[ \t]*=?[ \t]*(.*)$' % IDENTIFIER_REGEX,
+    re.MULTILINE | re.UNICODE)
+
+# Number of label text fields that we can display on a web form for issues.
+MAX_LABELS = 24
+
+# Default number of comments to display on an artifact detail page at one time.
+# Other comments will be paginated.
+DEFAULT_COMMENTS_PER_PAGE = 100
+
+# Content type to use when serving JSON.
+CONTENT_TYPE_JSON = 'application/json; charset=UTF-8'
+CONTENT_TYPE_JSON_OPTIONS = 'nosniff'
+
+# Maximum comments to index to keep the search index from choking.  E.g., if an
+# artifact had 1200 comments, only 0..99 and 701..1200 would be indexed.
+# This mainly affects advocacy issues which are highly redundant anyway.
+INITIAL_COMMENTS_TO_INDEX = 100
+FINAL_COMMENTS_TO_INDEX = 500
+
+# This is the longest string that GAE search will accept in one field.
+# The entire search document is also limited to 1MB, so our limit is 200 * 1024
+# chars so that each can be 4 bytes and the comments leave room for metadata.
+# https://cloud.google.com/appengine/docs/standard/python/search/#documents
+MAX_FTS_FIELD_SIZE = 200 * 1024
+
+# Base path to EZT templates.
+this_dir = os.path.dirname(__file__)
+TEMPLATE_PATH = this_dir[:this_dir.rindex('/')] + '/templates/'
+
+# Defaults for dooming a project.
+DEFAULT_DOOM_REASON = 'No longer needed'
+DEFAULT_DOOM_PERIOD = SECS_PER_DAY * 90
+
+MAX_PROJECT_PEOPLE = 1000
+
+MAX_HOTLIST_NAME_LENGTH = 80
+
+# When logging potentially long debugging strings, only show this many chars.
+LOGGING_MAX_LENGTH = 2000
+
+# Maps languages supported by google-code-prettify
+# to the class name that should be added to code blocks in that language.
+# This list should be kept in sync with the handlers registered
+# in lang-*.js and prettify.js from the prettify project.
+PRETTIFY_CLASS_MAP = {
+    ext: 'lang-' + ext
+    for ext in [
+        # Supported in lang-*.js
+        'apollo', 'agc', 'aea', 'lisp', 'el', 'cl', 'scm',
+        'css', 'go', 'hs', 'lua', 'fs', 'ml', 'proto', 'scala', 'sql', 'vb',
+        'vbs', 'vhdl', 'vhd', 'wiki', 'yaml', 'yml', 'clj',
+        # Supported in prettify.js
+        'htm', 'html', 'mxml', 'xhtml', 'xml', 'xsl',
+        'c', 'cc', 'cpp', 'cxx', 'cyc', 'm',
+        'json', 'cs', 'java', 'bsh', 'csh', 'sh', 'cv', 'py', 'perl', 'pl',
+        'pm', 'rb', 'js', 'coffee',
+        ]}
+
+# Languages which are not specifically mentioned in prettify.js
+# but which render intelligibly with the default handler.
+PRETTIFY_CLASS_MAP.update(
+    (ext, '') for ext in [
+        'hpp', 'hxx', 'hh', 'h', 'inl', 'idl', 'swig', 'd',
+        'php', 'tcl', 'aspx', 'cfc', 'cfm',
+        'ent', 'mod', 'as',
+        'y', 'lex', 'awk', 'n', 'pde',
+        ])
+
+# Languages which are not specifically mentioned in prettify.js
+# but which should be rendered using a certain prettify module.
+PRETTIFY_CLASS_MAP.update({
+    'docbook': 'lang-xml',
+    'dtd': 'lang-xml',
+    'duby': 'lang-rb',
+    'mk': 'lang-sh',
+    'mak': 'lang-sh',
+    'make': 'lang-sh',
+    'mirah': 'lang-rb',
+    'ss': 'lang-lisp',
+    'vcproj': 'lang-xml',
+    'xsd': 'lang-xml',
+    'xslt': 'lang-xml',
+})
+
+PRETTIFY_FILENAME_CLASS_MAP = {
+    'makefile': 'lang-sh',
+    'makefile.in': 'lang-sh',
+    'doxyfile': 'lang-sh',  # Key-value pairs with hash comments
+    '.checkstyle': 'lang-xml',
+    '.classpath': 'lang-xml',
+    '.project': 'lang-xml',
+}
+
+OAUTH_SCOPE = 'https://www.googleapis.com/auth/userinfo.email'
+MONORAIL_SCOPE = 'https://www.googleapis.com/auth/monorail'
+
+FILENAME_RE = re.compile('^[-_.a-zA-Z0-9 #+()]+$')