diff --git a/proto/project_pb2.py b/proto/project_pb2.py
new file mode 100644
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+++ b/proto/project_pb2.py
@@ -0,0 +1,239 @@
+# 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
+
+"""Protocol buffers for Monorail projects."""
+
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+from protorpc import messages
+
+# Project state affects permissions in that project, and project deletion.
+# It is edited on the project admin page.  If it is anything other that LIVE
+# it triggers a notice at the top of every project page.
+# For more info, see the "Project deletion in Monorail" design doc.
+class ProjectState(messages.Enum):
+  """Enum for states in the project lifecycle."""
+  # Project is visible and indexed. This is the typical state.
+  #
+  # If moved_to is set, this project is live but has been moved
+  # to another location, so redirects will be used or links shown.
+  LIVE = 1
+
+  # Project owner has requested the project be archived. Project is
+  # read-only to members only, off-limits to non-members.  Issues
+  # can be searched when in the project, but should not appear in
+  # site-wide searches.  The project name is still in-use by this
+  # project.
+  #
+  # If a delete_time is set, then the project is doomed: (1) the
+  # state can only be changed by a site admin, and (2) the project
+  # will automatically transition to DELETABLE after that time is
+  # reached.
+  ARCHIVED = 2
+
+  # Project can be deleted at any time.  The project name should
+  # have already been changed to a generated string, so it's
+  # impossible to navigate to this project, and the original name
+  # can be reused by a new project.
+  DELETABLE = 3
+
+
+# Project access affects permissions in that project.
+# It is edited on the project admin page.
+class ProjectAccess(messages.Enum):
+  """Enum for possible project access levels."""
+  # Anyone may view this project, even anonymous users.
+  ANYONE = 1
+
+  # Only project members may view the project.
+  MEMBERS_ONLY = 3
+
+
+# A Project PB represents a project in Monorail, which is a workspace for
+# project members to collaborate on issues.
+# A project is created on the project creation page, searched on the project
+# list page, and edited on the project admin page.
+# Next message: 74
+class Project(messages.Message):
+  """This protocol buffer holds all the metadata associated with a project."""
+  state = messages.EnumField(ProjectState, 1, required=True)
+  access = messages.EnumField(ProjectAccess, 18, default=ProjectAccess.ANYONE)
+
+  # The short identifier for this project. This value is lower-cased,
+  # and must be between 3 and 20 characters (inclusive). Alphanumeric
+  # and dashes are allowed, and it must start with an alpha character.
+  # Project names must be unique.
+  project_name = messages.StringField(2, required=True)
+
+  # A numeric identifier for this project.
+  project_id = messages.IntegerField(3, required=True)
+
+  # A one-line summary (human-readable) name of the project.
+  summary = messages.StringField(4, default='')
+
+  # A detailed description of the project.
+  description = messages.StringField(5, default='')
+
+  # Description of why this project has the state set as it is.
+  # This is used for administrative purposes to notify Owners that we
+  # are going to delete their project unless they can provide a good
+  # reason to not do so.
+  state_reason = messages.StringField(9)
+
+  # Time (in seconds) at which an ARCHIVED project may automatically
+  # be changed to state DELETABLE.  The state change is done by a
+  # cron job.
+  delete_time = messages.IntegerField(10)
+
+  # Note that these lists are disjoint (a user ID will not appear twice).
+  owner_ids = messages.IntegerField(11, repeated=True)
+  committer_ids = messages.IntegerField(12, repeated=True)
+  contributor_ids = messages.IntegerField(15, repeated=True)
+
+  class ExtraPerms(messages.Message):
+    """Nested message for each member's extra permissions in a project."""
+    member_id = messages.IntegerField(1, required=True)
+    # Each custom perm is a single word [a-zA-Z0-9].
+    perms = messages.StringField(2, repeated=True)
+
+  extra_perms = messages.MessageField(ExtraPerms, 16, repeated=True)
+
+  # Project owners may choose to have ALL issue change notifications go to a
+  # mailing list (in addition to going directly to the users interested
+  # in that issue).
+  issue_notify_address = messages.StringField(14)
+
+  # These fields keep track of the cumulative size of all issue attachments
+  # in a given project.  Normally, the number of bytes used is compared
+  # to a constant defined in the web application.  However, if a custom
+  # quota is specified here, it will be used instead.  An issue attachment
+  # will fail if its size would put the project over its quota.  Not all
+  # projects have these fields: they are only set when the first attachment
+  # is uploaded.
+  attachment_bytes_used = messages.IntegerField(38, default=0)
+  # If quota is not set, default from tracker_constants.py is used.
+  attachment_quota = messages.IntegerField(39)
+
+  # NOTE: open slots 40, 41
+
+  # Recent_activity is a timestamp (in seconds since the Epoch) of the
+  # last time that an issue was entered, updated, or commented on.
+  recent_activity = messages.IntegerField(42, default=0)
+
+  # NOTE: open slots 43...
+
+  # Timestamp (in seconds since the Epoch) of the most recent change
+  # to this project that would invalidate cached content.  It is set
+  # whenever project membership is edited, or any component config PB
+  # is edited.  HTTP requests for auto-complete feeds include this
+  # value in the URL.
+  cached_content_timestamp = messages.IntegerField(53, default=0)
+
+  # If set, this project has been moved elsewhere.  This can
+  # be an absolute URL, the name of another project on the same site.
+  moved_to = messages.StringField(60)
+
+  # Enable inbound email processing for issues.
+  process_inbound_email = messages.BooleanField(63, default=False)
+
+  # Limit removal of Restrict-* labels to project owners.
+  only_owners_remove_restrictions = messages.BooleanField(64, default=False)
+
+  # A per-project read-only lock. This lock (1) is meant to be
+  # long-lived (lasting as long as migration operations, project
+  # deletion, or anything else might take and (2) is meant to only
+  # limit user mutations; whether or not it limits automated actions
+  # that would change project data (such as workflow items) is
+  # determined based on the action.
+  #
+  # This lock is implemented as a user-visible string describing the
+  # reason for the project being in a read-only state. An absent or empty
+  # value indicates that the project is read-write; a present and
+  # non-empty value indicates that the project is read-only for the
+  # reason described.
+  read_only_reason = messages.StringField(65)
+
+  # This option is rarely used, but it makes sense for projects that aim for
+  # hub-and-spoke collaboration bewtween a vendor organization (like Google)
+  # and representatives of partner companies who are not supposed to know
+  # about each other.
+  # When true, it prevents project committers, contributors, and visitors
+  # from seeing the list of project members on the project summary page,
+  # on the People list page, and in autocomplete for issue owner and Cc.
+  # Project owners can always see the complete list of project members.
+  only_owners_see_contributors = messages.BooleanField(66, default=False)
+
+  # This configures the URLs generated when autolinking revision numbers.
+  # E.g., gitiles, viewvc, or crrev.com.
+  revision_url_format = messages.StringField(67)
+
+  # The home page of the Project.
+  home_page = messages.StringField(68)
+  # The url to redirect to for wiki/documentation links.
+  docs_url = messages.StringField(71)
+  # The url to redirect to for wiki/documentation links.
+  source_url = messages.StringField(72)
+  # The GCS object ID of the Project's logo.
+  logo_gcs_id = messages.StringField(69)
+  # The uploaded file name of the Project's logo.
+  logo_file_name = messages.StringField(70)
+
+  # Always send the full content of update in notifications.
+  issue_notify_always_detailed = messages.BooleanField(73, default=False)
+
+
+# This PB documents some of the duties of some of the members
+# in a given project.  This info is displayed on the project People page.
+class ProjectCommitments(messages.Message):
+  project_id = messages.IntegerField(50)
+
+  class MemberCommitment(messages.Message):
+    member_id = messages.IntegerField(11, required=True)
+    notes = messages.StringField(13)
+
+  commitments = messages.MessageField(MemberCommitment, 2, repeated=True)
+
+
+def MakeProject(
+    project_name, project_id=None, state=ProjectState.LIVE,
+    access=ProjectAccess.ANYONE, summary=None, description=None,
+    moved_to=None, cached_content_timestamp=None,
+    owner_ids=None, committer_ids=None, contributor_ids=None,
+    read_only_reason=None, home_page=None, docs_url=None, source_url=None,
+    logo_gcs_id=None, logo_file_name=None):
+  """Returns a project protocol buffer with the given attributes."""
+  project = Project(
+      project_name=project_name, access=access, state=state)
+  if project_id:
+    project.project_id = project_id
+  if moved_to:
+    project.moved_to = moved_to
+  if cached_content_timestamp:
+    project.cached_content_timestamp = cached_content_timestamp
+  if summary:
+    project.summary = summary
+  if description:
+    project.description = description
+  if home_page:
+    project.home_page = home_page
+  if docs_url:
+    project.docs_url = docs_url
+  if source_url:
+    project.source_url = source_url
+  if logo_gcs_id:
+    project.logo_gcs_id = logo_gcs_id
+  if logo_file_name:
+    project.logo_file_name = logo_file_name
+
+  project.owner_ids.extend(owner_ids or [])
+  project.committer_ids.extend(committer_ids or [])
+  project.contributor_ids.extend(contributor_ids or [])
+
+  if read_only_reason is not None:
+    project.read_only_reason = read_only_reason
+
+  return project