Render a single page of the spec in Hugo

4 years ago · 55eae7b70b
parent 2b32508964
commit 55eae7b70b
23 changed files with 2476 additions and 1 deletions
--- a/.gitignore
+++ b/.gitignore
@ -1,7 +1,7 @@
 /api/node_modules
-/assets
 /assets.tar.gz
 /env*
+/resources
 /scripts/gen
 /scripts/continuserv/continuserv
 /scripts/speculator/speculator
--- a/.gitmodules
+++ b/.gitmodules
@ -0,0 +1,3 @@
+[submodule "themes/docsy"]
+	path = themes/docsy
+	url = https://github.com/google/docsy.git
--- a/assets/icons/logo.svg
+++ b/assets/icons/logo.svg
@ -0,0 +1,5 @@
+<svg width="75" height="32" xmlns="http://www.w3.org/2000/svg">
+  <g fill="#000" fill-rule="nonzero">
+    <path d="M.936.732V31.25H3.13v.732H.095V0h3.034v.732zM9.386 10.407v1.544h.044a4.461 4.461 0 0 1 1.487-1.368c.58-.323 1.245-.485 1.993-.485.72 0 1.377.14 1.972.42.595.279 1.047.771 1.355 1.477.338-.5.796-.941 1.377-1.323.58-.383 1.266-.574 2.06-.574.602 0 1.16.074 1.674.22.514.148.954.383 1.322.707.366.323.653.746.859 1.268.205.522.308 1.15.308 1.887v7.633H20.71v-6.464c0-.383-.015-.743-.044-1.082a2.305 2.305 0 0 0-.242-.882 1.473 1.473 0 0 0-.584-.596c-.257-.146-.606-.22-1.047-.22-.44 0-.796.085-1.068.253-.272.17-.485.39-.639.662a2.654 2.654 0 0 0-.308.927 7.074 7.074 0 0 0-.078 1.048v6.354h-3.128v-6.398c0-.338-.007-.673-.021-1.004a2.825 2.825 0 0 0-.188-.916 1.411 1.411 0 0 0-.55-.673c-.258-.168-.636-.253-1.135-.253a2.33 2.33 0 0 0-.584.1 1.94 1.94 0 0 0-.705.374c-.228.184-.422.449-.584.794-.161.346-.242.798-.242 1.357v6.619H6.434V10.407h2.952zM25.842 12.084a3.751 3.751 0 0 1 1.233-1.17 5.37 5.37 0 0 1 1.685-.629 9.579 9.579 0 0 1 1.884-.187c.573 0 1.153.04 1.74.121.588.081 1.124.24 1.609.475.484.235.88.562 1.19.981.308.42.462.975.462 1.666v5.934c0 .516.03 1.008.088 1.478.058.471.161.824.308 1.06H32.87a4.435 4.435 0 0 1-.22-1.104c-.5.515-1.087.876-1.762 1.081a7.084 7.084 0 0 1-2.071.31c-.544 0-1.05-.067-1.52-.2a3.472 3.472 0 0 1-1.234-.617 2.87 2.87 0 0 1-.826-1.059c-.199-.426-.298-.934-.298-1.522 0-.647.114-1.18.342-1.6.227-.419.52-.753.881-1.004.36-.25.771-.437 1.234-.562.462-.125.929-.224 1.399-.298.47-.073.932-.132 1.387-.176.456-.044.86-.11 1.212-.199.353-.088.631-.217.837-.386.206-.169.301-.415.287-.74 0-.337-.055-.606-.166-.804a1.217 1.217 0 0 0-.44-.464 1.737 1.737 0 0 0-.639-.22 5.292 5.292 0 0 0-.782-.055c-.617 0-1.101.132-1.454.397-.352.264-.558.706-.617 1.323h-3.128c.044-.735.227-1.345.55-1.83zm6.179 4.423a5.095 5.095 0 0 1-.639.165 9.68 9.68 0 0 1-.716.11c-.25.03-.5.067-.749.11a5.616 5.616 0 0 0-.694.177 2.057 2.057 0 0 0-.594.298c-.17.125-.305.284-.408.474-.103.192-.154.434-.154.728 0 .28.051.515.154.706.103.192.242.342.419.453.176.11.381.187.617.231.234.044.477.066.726.066.617 0 1.094-.102 1.432-.309.338-.205.587-.452.75-.739.16-.286.26-.576.297-.87.036-.295.055-.53.055-.707v-1.17a1.4 1.4 0 0 1-.496.277zM43.884 10.407v2.096h-2.291v5.647c0 .53.088.883.264 1.059.176.177.529.265 1.057.265.177 0 .345-.007.507-.022.161-.015.316-.037.463-.066v2.426a7.49 7.49 0 0 1-.882.089 21.67 21.67 0 0 1-.947.022c-.484 0-.944-.034-1.377-.1a3.233 3.233 0 0 1-1.145-.386 2.04 2.04 0 0 1-.782-.816c-.191-.353-.287-.816-.287-1.39v-6.728H36.57v-2.096h1.894v-3.42h3.129v3.42h2.29zM48.355 10.407v2.118h.044a3.907 3.907 0 0 1 1.454-1.754 4.213 4.213 0 0 1 1.036-.497 3.734 3.734 0 0 1 1.145-.176c.206 0 .433.037.683.11v2.912a5.862 5.862 0 0 0-.528-.077 5.566 5.566 0 0 0-.595-.033c-.573 0-1.058.096-1.454.287a2.52 2.52 0 0 0-.958.783 3.143 3.143 0 0 0-.518 1.158 6.32 6.32 0 0 0-.154 1.434v5.14h-3.128V10.407h2.973zM54.039 8.642V6.06h3.128v2.582H54.04zm3.128 1.765v11.405H54.04V10.407h3.128zM58.797 10.407h3.569l2.005 2.978 1.982-2.978h3.459l-3.745 5.339 4.208 6.067h-3.57l-2.378-3.596-2.38 3.596h-3.502l4.097-6.001zM74.094 31.25V.732H71.9V0h3.035v31.982H71.9v-.732z"/>
+  </g>
+</svg>
--- a/assets/scss/_variables_project.scss
+++ b/assets/scss/_variables_project.scss
@ -0,0 +1,21 @@
+$primary: #FFF;
+$secondary: #0098D4;
+$dark: #333;
+$gray-100: #FBFBFB;
+
+$secondary-background: #E5F5FB;
+$secondary-lighter-background: #F4FaFC;
+$secondary-lightest-background: #FBFDFD;
+
+
+$warning: #FF6666;
+$note: $secondary;
+
+$note-background: $secondary-background;
+$warning-background: #FFE0E0;
+
+$table-row-alternate: $secondary-lightest-background;
+$table-row-default: $secondary-lighter-background;
+
+$google_font_name: "Inter";
+$google_font_family: "Inter:300,300i,400,400i,700,700i";
--- a/assets/scss/custom.scss
+++ b/assets/scss/custom.scss
@ -0,0 +1,234 @@
+/*
+Custom SCSS for the Matrix spec
+*/
+
+@import "variables_project";
+@import "variables";
+
+/* Overrides for the navbar */
+.td-navbar {
+  box-shadow: 0px 0px 8px rgba(179, 179, 179, 0.25);
+  min-height: 5rem;
+
+  .navbar-brand {
+    font-size: 1.1rem;
+
+    .navbar-version {
+      color: $secondary;
+    }
+
+  }
+
+  a {
+    color: $black;
+  }
+}
+
+/* Styles for the sidebar nav */
+.td-sidebar-nav {
+  scroll-behavior: smooth;
+
+  /* This overrides calc(100vh - 10rem);, which gives us a blank space at the bottom of the sidebar */
+  max-height: calc(100vh - 6rem);
+
+  &>.td-sidebar-nav__section {
+    margin-top: 1rem;
+  }
+
+  &>.td-sidebar-nav__section > li > a.td-sidebar-link {
+      font-weight: $font-weight-bold;
+      font-size: 1.3rem;
+  }
+
+  /* This is to make the width of the items that have sub-items (like room versions)
+  the same as the width of items that don't (like changelog) */
+  .pr-md-3, .px-md-3 {
+    padding-right: 0 !important;
+  }
+
+  a.indent-1 {
+    padding-left: 1rem !important;
+  }
+
+  a.indent-2 {
+    padding-left: 2rem;
+  }
+
+  a, a.td-sidebar-link {
+    color: $gray-800;
+    font-weight: $font-weight-normal;
+    padding-top: .2rem;
+    padding-bottom: .2rem;
+
+    display: block;
+    transition: all 100ms ease-in-out;
+
+    &:hover {
+      background-color: $secondary-lighter-background;
+      color: $gray-800;
+    }
+
+    &.active, &active:hover {
+      background-color: $secondary-background;
+      font-weight: $font-weight-normal;
+    }
+  }
+}
+
+/* Customise footer */
+footer {
+  box-shadow: 0px 0px 8px rgba(179, 179, 179, 0.25);
+}
+
+/* Auto numbering for headings */
+.td-content {
+
+  counter-reset: h2;
+
+  &> h2 {
+    counter-reset: h3
+  }
+
+  &> h3 {
+    counter-reset: h4
+  }
+
+  &> h4 {
+    counter-reset: h5
+  }
+
+  &> h5 {
+    counter-reset: h6
+  }
+
+  &> h2:not(.no-numbers):before {
+    display: inline; visibility: visible; counter-increment: h2; content: counter(h2) ". "
+  }
+
+  &> h3:not(.no-numbers):before {
+    display: inline; visibility: visible; counter-increment: h3; content: counter(h2) "." counter(h3) ". "
+  }
+
+  &> h4:not(.no-numbers):before {
+    display: inline; visibility: visible; counter-increment: h4; content: counter(h2) "." counter(h3) "." counter(h4) ". "
+  }
+
+  &> h5:not(.no-numbers):before {
+    display: inline; visibility: visible; counter-increment: h5; content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) ". "
+  }
+
+  &> h6:not(.no-numbers):before {
+    display: inline; visibility: visible; counter-increment: h6; content: counter(h2) "." counter(h3) "." counter(h4) "." counter(h5) "." counter(h6) ". "
+  }
+
+}
+
+/* Adjust heading anchors for site header */
+.td-content {
+  &> h2,
+  &> h3,
+  &> h4,
+  &> h5,
+  &> h6,
+  .rendered-data h1 {
+    scroll-margin-top: 5rem;
+  }
+}
+
+/* Styles for the table of contents */
+#toc {
+  padding-top: .5rem;
+  padding-left: 1.5rem;
+
+  ol {
+    padding-left: 1rem;
+    counter-reset: section;
+    list-style-type: none;
+  }
+
+  #TableOfContents {
+    &>ol>li {
+      margin-bottom: .5rem;
+
+      &>a {
+        font-weight: $font-weight-bold;
+      }
+    }
+
+    ol {
+      padding-left: 0;
+    }
+
+    &>ol>li>a {
+      padding-left: 1rem;
+    }
+
+    &>ol>li>ol>li>a {
+      padding-left: 2rem;
+    }
+
+    &>ol>li>ol>li>ol>li>a {
+      padding-left: 3rem;
+    }
+
+    &>ol>li>ol>li>ol>li>ol>li>a {
+      padding-left: 4rem;
+    }
+
+    &>ol>li>ol>li>ol>li>ol>li>ol>li>a {
+      padding-left: 5rem;
+    }
+
+  }
+
+  li a:before {
+    counter-increment: section;
+    content: counters(section, ".") " ";
+  }
+
+  #toc-title {
+    font-weight: $font-weight-bold;
+    font-size: 1.3rem;
+  }
+
+}
+
+/* Miscellaneous custom bits */
+
+/* Update link colours for MAtrix style */
+a, a:hover {
+  color: $secondary;
+}
+
+/* This is needed to stop the bottom of the Matrix icon from getting snipped off. */
+.td-navbar .navbar-brand svg {
+  height: 32px;
+}
+
+/* Give code samples and pre elements full-width */
+.td-content > .highlight, .td-content > pre {
+  max-width: 100%;
+}
+
+/*
+Make padding symmetrical (this selector is used to apply padding-left: 3rem)
+*/
+.pl-md-5, .px-md-5 {
+  padding-right: 3rem;
+}
+
+/* Adjust default styles for info banner */
+.pageinfo-primary {
+  max-width: 80%;
+  margin-left: 0;
+  border: 0;
+  border-left: solid 5px $secondary;
+  background-color: $gray-100;
+}
+
+.pageinfo-unstable {
+  background-image: url('/icons/unstable.png');
+  background-position: left 1rem center;
+  background-repeat: no-repeat;
+  padding-left: 100px;
+}
--- a/config.toml
+++ b/config.toml
@ -0,0 +1,74 @@
+baseURL = "/"
+title = "Matrix Specification"
+
+enableRobotsTXT = true
+
+# Hugo allows theme composition (and inheritance). The precedence is from left to right.
+theme = ["docsy"]
+
+disableKinds = ["taxonomy", "taxonomyTerm"]
+
+[languages]
+[languages.en]
+title = "Matrix Specification"
+description = "Home of the Matrix specification for decentralised communication"
+languageName ="English"
+# Weight used for sorting.
+weight = 1
+
+[markup]
+  [markup.goldmark]
+    [markup.goldmark.renderer]
+      # Enables us to render raw HTML
+      unsafe = true
+  [markup.highlight]
+      # See a complete list of available styles at https://xyproto.github.io/splash/docs/all.html
+      style = "tango"
+
+# Everything below this are Site Params
+
+[params]
+copyright = "The Matrix.org Foundation CIC"
+privacy_policy = "https://matrix.org/legal/privacy-notice"
+
+[params.version]
+# must be one of "unstable", "current", "historical"
+# this is used to decide whether to show a banner pointing to the current release
+status = "unstable"
+current_version_url = "https://spec.matrix.org/latest"
+
+# User interface configuration
+[params.ui]
+# Set to true to disable the About link in the site footer
+footer_about_disable = false
+# Collapse HTTP API and event <details> elements
+rendered_data_collapsed = false
+
+[params.links]
+# End user relevant links. These will show up on left side of footer and in the community page if you have one.
+# [[params.links.user]]
+# 	name = "User mailing list"
+# 	url = "https://example.org/mail"
+# 	icon = "fa fa-envelope"
+#         desc = "Discussion and help from your fellow users"
+# Developer relevant links. These will show up on right side of footer and in the community page if you have one.
+[[params.links.developer]]
+	name = "GitHub"
+	url = "https://github.com/matrix-org"
+	icon = "fab fa-github"
+  desc = "Matrix on GitHub"
+[[params.links.developer]]
+	name = "GitLab"
+	url = "https://gitlab.matrix.org/matrix-org"
+	icon = "fab fa-gitlab"
+  desc = "Matrix on GitLab"
+[[params.links.developer]]
+	name = "YouTube"
+	url = "https://www.youtube.com/channel/UCVFkW-chclhuyYRbmmfwt6w"
+	icon = "fab fa-youtube"
+  desc = "Matrix YouTube channel"
+[[params.links.developer]]
+	name = "Twitter"
+	url = "https://twitter.com/matrixdotorg"
+	icon = "fab fa-twitter"
+  desc = "Matrix on Twitter"
--- a/content/_index.md
+++ b/content/_index.md
@ -0,0 +1,553 @@
+---
+title: "Matrix Specification"
+type: docs
+weight: 10
+---
+
+Matrix defines a set of open APIs for decentralised communication,
+suitable for securely publishing, persisting and subscribing to data
+over a global open federation of servers with no single point of
+control. Uses include Instant Messaging (IM), Voice over IP (VoIP)
+signalling, Internet of Things (IoT) communication, and bridging
+together existing communication silos - providing the basis of a new
+open real-time communication ecosystem.
+
+To propose a change to the Matrix Spec, see the explanations at
+[Proposals for Spec Changes to Matrix](proposals).
+
+## Matrix APIs
+
+The specification consists of the following parts:
+
+{{apis}}
+
+Additionally, this introduction page contains the key baseline
+information required to understand the specific APIs, including the
+sections on [room versions](#room-versions) and [overall
+architecture](#architecture).
+
+The [Appendices](appendices.html) contain supplemental information not
+specific to one of the above APIs.
+
+The [Matrix Client-Server API Swagger
+Viewer](https://matrix.org/docs/api/client-server/) is useful for
+browsing the Client-Server API.
+
+### Matrix versions
+
+Note
+
+As of June 10th 2019, the Matrix specification is considered out of beta
+-indicating that all currently released APIs are considered stable and
+secure to the best of our knowledge, and the spec should contain the
+complete information necessary to develop production-grade
+implementations of Matrix without the need for external reference.
+
+Matrix 1.0 (released June 10th, 2019) consists of the following minimum
+API versions:
+
+<table>
+<thead>
+<tr class="header">
+<th>API/Specification</th>
+<th>Version</th>
+</tr>
+</thead>
+<tbody>
+<tr class="odd">
+<td>Client-Server API</td>
+<td>r0.5.0</td>
+</tr>
+<tr class="even">
+<td>Server-Server API</td>
+<td>r0.1.2</td>
+</tr>
+<tr class="odd">
+<td>Application Service API</td>
+<td>r0.1.1</td>
+</tr>
+<tr class="even">
+<td>Identity Service API</td>
+<td>r0.1.1</td>
+</tr>
+<tr class="odd">
+<td>Push Gateway API</td>
+<td>r0.1.0</td>
+</tr>
+<tr class="even">
+<td>Room Version</td>
+<td>v5</td>
+</tr>
+</tbody>
+</table>
+
+## Introduction to the Matrix APIs
+
+Matrix is a set of open APIs for open-federated Instant Messaging (IM),
+Voice over IP (VoIP) and Internet of Things (IoT) communication,
+designed to create and support a new global real-time communication
+ecosystem. The intention is to provide an open decentralised pubsub
+layer for the internet for securely persisting and
+publishing/subscribing JSON objects. This specification is the ongoing
+result of standardising the APIs used by the various components of the
+Matrix ecosystem to communicate with one another.
+
+The principles that Matrix attempts to follow are:
+
+-   Pragmatic Web-friendly APIs (i.e. JSON over REST)
+-   Keep It Simple & Stupid
+    -   provide a simple architecture with minimal third-party
+        dependencies.
+-   Fully open:
+    -   Fully open federation - anyone should be able to participate in
+        the global Matrix network
+    -   Fully open standard - publicly documented standard with no IP or
+        patent licensing encumbrances
+    -   Fully open source reference implementation - liberally-licensed
+        example implementations with no IP or patent licensing
+        encumbrances
+-   Empowering the end-user
+    -   The user should be able to choose the server and clients they
+        use
+    -   The user should be able to control how private their
+        communication is
+    -   The user should know precisely where their data is stored
+-   Fully decentralised - no single points of control over conversations
+    or the network as a whole
+-   Learning from history to avoid repeating it
+    -   Trying to take the best aspects of XMPP, SIP, IRC, SMTP, IMAP
+        and NNTP whilst trying to avoid their failings
+
+The functionality that Matrix provides includes:
+
+-   Creation and management of fully distributed chat rooms with no
+    single points of control or failure
+-   Eventually-consistent cryptographically secure synchronisation of
+    room state across a global open network of federated servers and
+    services
+-   Sending and receiving extensible messages in a room with (optional)
+    end-to-end encryption
+-   Extensible user management (inviting, joining, leaving, kicking,
+    banning) mediated by a power-level based user privilege system.
+-   Extensible room state management (room naming, aliasing, topics,
+    bans)
+-   Extensible user profile management (avatars, display names, etc)
+-   Managing user accounts (registration, login, logout)
+-   Use of 3rd Party IDs (3PIDs) such as email addresses, phone numbers,
+    Facebook accounts to authenticate, identify and discover users on
+    Matrix.
+-   Trusted federation of identity servers for:
+    -   Publishing user public keys for PKI
+    -   Mapping of 3PIDs to Matrix IDs
+
+The end goal of Matrix is to be a ubiquitous messaging layer for
+synchronising arbitrary data between sets of people, devices and
+services - be that for instant messages, VoIP call setups, or any other
+objects that need to be reliably and persistently pushed from A to B in
+an interoperable and federated manner.
+
+### Spec Change Proposals
+
+To propose a change to the Matrix Spec, see the explanations at
+[Proposals for Spec Changes to Matrix](proposals).
+
+## Architecture
+
+Matrix defines APIs for synchronising extensible JSON objects known as
+"events" between compatible clients, servers and services. Clients are
+typically messaging/VoIP applications or IoT devices/hubs and
+communicate by synchronising communication history with their
+"homeserver" using the "Client-Server API". Each homeserver stores the
+communication history and account information for all of its clients,
+and shares data with the wider Matrix ecosystem by synchronising
+communication history with other homeservers and their clients.
+
+Clients typically communicate with each other by emitting events in the
+context of a virtual "room". Room data is replicated across *all of the
+homeservers* whose users are participating in a given room. As such, *no
+single homeserver has control or ownership over a given room*.
+Homeservers model communication history as a partially ordered graph of
+events known as the room's "event graph", which is synchronised with
+eventual consistency between the participating servers using the
+"Server-Server API". This process of synchronising shared conversation
+history between homeservers run by different parties is called
+"Federation". Matrix optimises for the Availability and Partitioned
+properties of CAP theorem at the expense of Consistency.
+
+For example, for client A to send a message to client B, client A
+performs an HTTP PUT of the required JSON event on its homeserver (HS)
+using the client-server API. A's HS appends this event to its copy of
+the room's event graph, signing the message in the context of the graph
+for integrity. A's HS then replicates the message to B's HS by
+performing an HTTP PUT using the server-server API. B's HS authenticates
+the request, validates the event's signature, authorises the event's
+contents and then adds it to its copy of the room's event graph. Client
+B then receives the message from his homeserver via a long-lived GET
+request.
+
+    How data flows between clients
+    ==============================
+
+    { Matrix client A }                             { Matrix client B }
+    ^          |                                    ^          |
+    |  events  |  Client-Server API                 |  events  |
+    |          V                                    |          V
+    +------------------+                            +------------------+
+    |                  |---------( HTTPS )--------->|                  |
+    |   homeserver     |                            |   homeserver     |
+    |                  |<--------( HTTPS )----------|                  |
+    +------------------+      Server-Server API     +------------------+
+         History Synchronisation
+             (Federation)
+
+### Users
+
+Each client is associated with a user account, which is identified in
+Matrix using a unique "user ID". This ID is namespaced to the homeserver
+which allocated the account and has the form:
+
+    @localpart:domain
+
+See ['Identifier Grammar' in the
+appendices](appendices.html#identifier-grammar) for full details of the
+structure of user IDs.
+
+### Devices
+
+The Matrix specification has a particular meaning for the term "device".
+As a user, I might have several devices: a desktop client, some web
+browsers, an Android device, an iPhone, etc. They broadly relate to a
+real device in the physical world, but you might have several browsers
+on a physical device, or several Matrix client applications on a mobile
+device, each of which would be its own device.
+
+Devices are used primarily to manage the keys used for end-to-end
+encryption (each device gets its own copy of the decryption keys), but
+they also help users manage their access - for instance, by revoking
+access to particular devices.
+
+When a user first uses a client, it registers itself as a new device.
+The longevity of devices might depend on the type of client. A web
+client will probably drop all of its state on logout, and create a new
+device every time you log in, to ensure that cryptography keys are not
+leaked to a new user. In a mobile client, it might be acceptable to
+reuse the device if a login session expires, provided the user is the
+same.
+
+Devices are identified by a `device_id`, which is unique within the
+scope of a given user.
+
+A user may assign a human-readable display name to a device, to help
+them manage their devices.
+
+### Events
+
+All data exchanged over Matrix is expressed as an "event". Typically
+each client action (e.g. sending a message) correlates with exactly one
+event. Each event has a `type` which is used to differentiate different
+kinds of data. `type` values MUST be uniquely globally namespaced
+following Java's [package naming
+conventions](https://en.wikipedia.org/wiki/Java_package#Package_naming_conventions),
+e.g. `com.example.myapp.event`. The special top-level namespace `m.` is
+reserved for events defined in the Matrix specification - for instance
+`m.room.message` is the event type for instant messages. Events are
+usually sent in the context of a "Room".
+
+### Event Graphs
+
+Events exchanged in the context of a room are stored in a directed
+acyclic graph (DAG) called an "event graph". The partial ordering of
+this graph gives the chronological ordering of events within the room.
+Each event in the graph has a list of zero or more "parent" events,
+which refer to any preceding events which have no chronological
+successor from the perspective of the homeserver which created the
+event.
+
+Typically an event has a single parent: the most recent message in the
+room at the point it was sent. However, homeservers may legitimately
+race with each other when sending messages, resulting in a single event
+having multiple successors. The next event added to the graph thus will
+have multiple parents. Every event graph has a single root event with no
+parent.
+
+To order and ease chronological comparison between the events within the
+graph, homeservers maintain a `depth` metadata field on each event. An
+event's `depth` is a positive integer that is strictly greater than the
+depths of any of its parents. The root event should have a depth of 1.
+Thus if one event is before another, then it must have a strictly
+smaller depth.
+
+### Room structure
+
+A room is a conceptual place where users can send and receive events.
+Events are sent to a room, and all participants in that room with
+sufficient access will receive the event. Rooms are uniquely identified
+internally via "Room IDs", which have the form:
+
+    !opaque_id:domain
+
+There is exactly one room ID for each room. Whilst the room ID does
+contain a domain, it is simply for globally namespacing room IDs. The
+room does NOT reside on the domain specified.
+
+See ['Identifier Grammar' in the
+appendices](appendices.html#identifier-grammar) for full details of the
+structure of a room ID.
+
+The following conceptual diagram shows an `m.room.message` event being
+sent to the room `!qporfwt:matrix.org`:
+
+    { @alice:matrix.org }                             { @bob:example.org }
+            |                                                 ^
+            |                                                 |
+    [HTTP POST]                                  [HTTP GET]
+    Room ID: !qporfwt:matrix.org                 Room ID: !qporfwt:matrix.org
+    Event type: m.room.message                   Event type: m.room.message
+    Content: { JSON object }                     Content: { JSON object }
+            |                                                 |
+            V                                                 |
+    +------------------+                          +------------------+
+    |   homeserver     |                          |   homeserver     |
+    |   matrix.org     |                          |   example.org    |
+    +------------------+                          +------------------+
+            |                                                 ^
+            |         [HTTP PUT]                              |
+            |         Room ID: !qporfwt:matrix.org            |
+            |         Event type: m.room.message              |
+            |         Content: { JSON object }                |
+            `-------> Pointer to the preceding message  ------`
+                      PKI signature from matrix.org
+                      Transaction-layer metadata
+                      PKI Authorization header
+
+                  ....................................
+                 |           Shared Data              |
+                 | State:                             |
+                 |   Room ID: !qporfwt:matrix.org     |
+                 |   Servers: matrix.org, example.org |
+                 |   Members:                         |
+                 |    - @alice:matrix.org             |
+                 |    - @bob:example.org              |
+                 | Messages:                          |
+                 |   - @alice:matrix.org              |
+                 |     Content: { JSON object }       |
+                 |....................................|
+
+Federation maintains *shared data structures* per-room between multiple
+homeservers. The data is split into `message events` and `state events`.
+
+Message events:  
+These describe transient 'once-off' activity in a room such as an
+instant messages, VoIP call setups, file transfers, etc. They generally
+describe communication activity.
+
+State events:  
+These describe updates to a given piece of persistent information
+('state') related to a room, such as the room's name, topic, membership,
+participating servers, etc. State is modelled as a lookup table of
+key/value pairs per room, with each key being a tuple of `state_key` and
+`event type`. Each state event updates the value of a given key.
+
+The state of the room at a given point is calculated by considering all
+events preceding and including a given event in the graph. Where events
+describe the same state, a merge conflict algorithm is applied. The
+state resolution algorithm is transitive and does not depend on server
+state, as it must consistently select the same event irrespective of the
+server or the order the events were received in. Events are signed by
+the originating server (the signature includes the parent relations,
+type, depth and payload hash) and are pushed over federation to the
+participating servers in a room, currently using full mesh topology.
+Servers may also request backfill of events over federation from the
+other servers participating in a room.
+
+Note
+
+Events are not limited to the types defined in this specification. New
+or custom event types can be created on a whim using the Java package
+naming convention. For example, a `com.example.game.score` event can be
+sent by clients and other clients would receive it through Matrix,
+assuming the client has access to the `com.example` namespace.
+
+#### Room Aliases
+
+Each room can also have multiple "Room Aliases", which look like:
+
+    #room_alias:domain
+
+See ['Identifier Grammar' in the
+appendices](appendices.html#identifier-grammar) for full details of the
+structure of a room alias.
+
+A room alias "points" to a room ID and is the human-readable label by
+which rooms are publicised and discovered. The room ID the alias is
+pointing to can be obtained by visiting the domain specified. Note that
+the mapping from a room alias to a room ID is not fixed, and may change
+over time to point to a different room ID. For this reason, Clients
+SHOULD resolve the room alias to a room ID once and then use that ID on
+subsequent requests.
+
+When resolving a room alias the server will also respond with a list of
+servers that are in the room that can be used to join via.
+
+    HTTP GET
+    #matrix:example.org      !aaabaa:matrix.org
+       |                    ^
+       |                    |
+    _______V____________________|____
+    |          example.org           |
+    | Mappings:                      |
+    | #matrix >> !aaabaa:matrix.org  |
+    | #golf   >> !wfeiofh:sport.com  |
+    | #bike   >> !4rguxf:matrix.org  |
+    |________________________________|
+
+### Identity
+
+Users in Matrix are identified via their Matrix user ID. However,
+existing 3rd party ID namespaces can also be used in order to identify
+Matrix users. A Matrix "Identity" describes both the user ID and any
+other existing IDs from third party namespaces *linked* to their
+account. Matrix users can *link* third-party IDs (3PIDs) such as email
+addresses, social network accounts and phone numbers to their user ID.
+Linking 3PIDs creates a mapping from a 3PID to a user ID. This mapping
+can then be used by Matrix users in order to discover the user IDs of
+their contacts. In order to ensure that the mapping from 3PID to user ID
+is genuine, a globally federated cluster of trusted "identity servers"
+(IS) are used to verify the 3PID and persist and replicate the mappings.
+
+Usage of an IS is not required in order for a client application to be
+part of the Matrix ecosystem. However, without one clients will not be
+able to look up user IDs using 3PIDs.
+
+### Profiles
+
+Users may publish arbitrary key/value data associated with their account
+- such as a human-readable display name, a profile photo URL, contact
+information (email address, phone numbers, website URLs etc).
+
+### Private User Data
+
+Users may also store arbitrary private key/value data in their account -
+such as client preferences, or server configuration settings which lack
+any other dedicated API. The API is symmetrical to managing Profile
+data.
+
+## Common concepts
+
+Various things are common throughout all of the Matrix APIs. They are
+documented here.
+
+### Namespacing
+
+Namespacing helps prevent conflicts between multiple applications and
+the specification itself. Where namespacing is used, `m.` prefixes are
+used by the specification to indicate that the field is controlled by
+the specification. Custom or non-specified namespaces used in the wild
+MUST use the Java package naming convention to prevent conflicts.
+
+As an example, event types defined in the specification are namespaced
+under the special `m.` prefix, however any client can send a custom
+event type, such as `com.example.game.score` (assuming the client has
+rights to the `com.example` namespace) without needing to put the event
+into the `m.` namespace.
+
+### Timestamps
+
+Unless otherwise stated, timestamps are measured as milliseconds since
+the Unix epoch. Throughout the specification this may be referred to as
+POSIX, Unix, or just "time in milliseconds".
+
+## Room Versions
+
+Rooms are central to how Matrix operates, and have strict rules for what
+is allowed to be contained within them. Rooms can also have various
+algorithms that handle different tasks, such as what to do when two or
+more events collide in the underlying DAG. To allow rooms to be improved
+upon through new algorithms or rules, "room versions" are employed to
+manage a set of expectations for each room. New room versions are
+assigned as needed.
+
+There is no implicit ordering or hierarchy to room versions, and their
+principles are immutable once placed in the specification. Although
+there is a recommended set of versions, some rooms may benefit from
+features introduced by other versions. Rooms move between different
+versions by "upgrading" to the desired version. Due to versions not
+being ordered or hierarchical, this means a room can "upgrade" from
+version 2 to version 1, if it is so desired.
+
+### Room version grammar
+
+Room versions are used to change properties of rooms that may not be
+compatible with other servers. For example, changing the rules for event
+authorization would cause older servers to potentially end up in a
+split-brain situation due to not understanding the new rules.
+
+A room version is defined as a string of characters which MUST NOT
+exceed 32 codepoints in length. Room versions MUST NOT be empty and
+SHOULD contain only the characters `a-z`, `0-9`, `.`, and `-`.
+
+Room versions are not intended to be parsed and should be treated as
+opaque identifiers. Room versions consisting only of the characters
+`0-9` and `.` are reserved for future versions of the Matrix protocol.
+
+The complete grammar for a legal room version is:
+
+    room_version = 1*room_version_char
+    room_version_char = DIGIT
+                      / %x61-7A         ; a-z
+                      / "-" / "."
+
+Examples of valid room versions are:
+
+-   `1` (would be reserved by the Matrix protocol)
+-   `1.2` (would be reserved by the Matrix protocol)
+-   `1.2-beta`
+-   `com.example.version`
+
+### Complete list of room versions
+
+Room versions are divided into two distinct groups: stable and unstable.
+Stable room versions may be used by rooms safely. Unstable room versions
+are everything else which is either not listed in the specification or
+flagged as unstable for some other reason. Versions can switch between
+stable and unstable periodically for a variety of reasons, including
+discovered security vulnerabilities and age.
+
+Clients should not ask room administrators to upgrade their rooms if the
+room is running a stable version. Servers SHOULD use room version 6 as
+the default room version when creating new rooms.
+
+The available room versions are:
+
+-   [Version 1](rooms/v1.html) - **Stable**. The current version of most
+    rooms.
+-   [Version 2](rooms/v2.html) - **Stable**. Implements State Resolution
+    Version 2.
+-   [Version 3](rooms/v3.html) - **Stable**. Introduces events whose IDs
+    are the event's hash.
+-   [Version 4](rooms/v4.html) - **Stable**. Builds on v3 by using
+    URL-safe base64 for event IDs.
+-   [Version 5](rooms/v5.html) - **Stable**. Introduces enforcement of
+    signing key validity periods.
+-   [Version 6](rooms/v6.html) - **Stable**. Alters several
+    authorization rules for events.
+
+## Specification Versions
+
+The specification for each API is versioned in the form `rX.Y.Z`.  
+-   A change to `X` reflects a breaking change: a client implemented
+    against `r1.0.0` may need changes to work with a server which
+    supports (only) `r2.0.0`.
+-   A change to `Y` represents a change which is backwards-compatible
+    for existing clients, but not necessarily existing servers: a client
+    implemented against `r1.1.0` will work without changes against a
+    server which supports `r1.2.0`; but a client which requires `r1.2.0`
+    may not work correctly with a server which implements only `r1.1.0`.
+-   A change to `Z` represents a change which is backwards-compatible on
+    both sides. Typically this implies a clarification to the
+    specification, rather than a change which must be implemented.
+
+## License
+
+The Matrix specification is licensed under the [Apache License, Version
+2.0](http://www.apache.org/licenses/LICENSE-2.0).
--- a/layouts/404.html
+++ b/layouts/404.html
@ -0,0 +1,8 @@
+{{ define "main"}}
+    <main id="main">
+      <div>
+       <h1 id="title">Not found</h1>
+          <p>This page doesn't exist. Try going back to the <a href="{{ "/" | relURL }}">main page for the Matrix Specification</a>.</p>
+      </div>
+    </main>
+{{ end }}
--- a/layouts/_default/content.html
+++ b/layouts/_default/content.html
@ -0,0 +1,4 @@
+<div class="td-content">
+	<h1>{{ .Title }}</h1>
+	{{ .Content }}
+</div>
--- a/layouts/docs/baseof.html
+++ b/layouts/docs/baseof.html
@ -0,0 +1,27 @@
+<!doctype html>
+<html lang="{{ .Site.Language.Lang }}" class="no-js">
+  <head>
+    {{ partial "head.html" . }}
+  </head>
+  <body class="td-{{ .Kind }}">
+    <header>
+      {{ partial "navbar.html" . }}
+    </header>
+    <div class="container-fluid td-outer">
+      <div class="td-main">
+        <div class="row flex-xl-nowrap">
+          <div class="col-12 col-md-3 col-xl-3 td-sidebar d-print-none">
+            {{ partial "sidebar.html" . }}
+          </div>
+          <main class="col-12 col-md-9 col-xl-7 pl-md-5" role="main">
+            {{ partial "version-banner.html" . }}
+            {{ partial "breadcrumb.html" . }}
+            {{ block "main" . }}{{ end }}
+          </main>
+        </div>
+      </div>
+      {{ partial "footer.html" . }}
+    </div>
+    {{ partial "scripts.html" . }}
+  </body>
+</html>
--- a/layouts/docs/list.html
+++ b/layouts/docs/list.html
@ -0,0 +1,7 @@
+{{ define "main" }}
+<div class="td-content">
+	<h1>{{ .Title }}</h1>
+        {{ with .Params.description }}<div class="lead">{{ . | markdownify }}</div>{{ end }}
+	{{ .Content }}
+</div>
+{{ end }}
--- a/layouts/partials/breadcrumb.html
+++ b/layouts/partials/breadcrumb.html
@ -0,0 +1,28 @@
+{{/*
+
+  A copy of the breadcrumb.html partial in Docsy, modified
+	to:
+  * omit breadcrumbs when this is the homepage
+  * otherwise, include the homepage in the breadcrumbs
+
+*/}}
+
+{{ if not .IsHome }}
+<nav aria-label="breadcrumb" class="d-none d-md-block d-print-none">
+	<ol class="breadcrumb spb-1">
+{{ template "breadcrumbnav" (dict "p1" . "p2" .) }}
+	</ol>
+</nav	>
+{{ end }}
+
+{{ define "breadcrumbnav" }}
+{{ if .p1.Parent }}
+{{ template "breadcrumbnav" (dict "p1" .p1.Parent "p2" .p2 )  }}
+{{ else if not .p1.IsHome }}
+{{ template "breadcrumbnav" (dict "p1" .p1.Site.Home "p2" .p2 )  }}
+{{ end }}
+{{ $isActive :=  eq .p1 .p2  }}
+<li class="breadcrumb-item{{ if $isActive }} active{{ end }}" {{ if $isActive }}aria-current="page"{{ end }}>
+	<a href="{{ .p1.Permalink }}">{{ .p1.LinkTitle }}</a>
+</li>
+{{ end }}
--- a/layouts/partials/footer.html
+++ b/layouts/partials/footer.html
@ -0,0 +1,33 @@
+{{ $links := .Site.Params.links }}
+<footer class="py-5 row d-print-none">
+  <div class="container-fluid mx-sm-5">
+    <div class="row">
+      <div class="col-12 text-center text-xs-center order-sm-3">
+        {{ with $links }}
+        {{ with index . "developer"}}
+        {{ template "footer-links-block"  . }}
+        {{ end }}
+        {{ end }}
+      </div>
+    </div>
+    <div class="row">
+      <div class="col-12 text-center py-2 order-sm-3">
+        {{ with .Site.Params.copyright }}<small>&copy; {{ now.Year}} {{ .}}</small>{{ end }}
+	{{ if not .Site.Params.ui.footer_about_disable }}
+		{{ with .Site.GetPage "about" }}<p class="mt-2"><a href="{{ .RelPermalink }}">{{ .Title }}</a></p>{{ end }}
+	{{ end }}
+      </div>
+    </div>
+  </div>
+</footer>
+{{ define "footer-links-block" }}
+<ul class="list-inline mb-0">
+  {{ range . }}
+  <li class="list-inline-item mx-2 h3" data-toggle="tooltip" data-placement="top" title="{{ .name }}" aria-label="{{ .name }}">
+    <a class="text-dark" target="_blank" rel="noopener noreferrer" href="{{ .url }}">
+      <i class="{{ .icon }}"></i>
+    </a>
+  </li>
+  {{ end }}
+</ul>
+{{ end }}
--- a/layouts/partials/hooks/body-end.html
+++ b/layouts/partials/hooks/body-end.html
@ -0,0 +1,17 @@
+{{/*
+
+  This template is included at the end of each page's `<body>`.
+
+  We're using it here to:
+
+  1) include the JS that generates the table of contents. It would be better
+  to generate the table of contents as part of the Hugo build process, but
+  that doesn't work nicely with the way we want to author client-server modules
+  as separate files.
+
+  2) highlight and scroll the ToC in the sidebar to match the place we are at
+  in the document.
+
+*/}}
+
+<script defer language="javascript" type="text/javascript"  src="{{ "js/toc.js" | urlize | relURL }}"></script>
--- a/layouts/partials/hooks/head-end.html
+++ b/layouts/partials/hooks/head-end.html
@ -0,0 +1,18 @@
+{{/*
+
+  This template is included at the end of each page's `<head>`.
+
+  We're using it here to include the custom CSS for the Matrix spec.
+
+*/}}
+
+{{ $scss := "scss/custom.scss"}}
+{{ if .Site.IsServer }}
+{{/* Note the missing postCSS. This makes it snappier to develop in Chrome, but makes it look sub-optimal in other browsers. */}}
+{{ $css := resources.Get $scss | toCSS (dict "enableSourceMap" true) }}
+<link href="{{ $css.RelPermalink }}" rel="stylesheet">
+{{ else }}
+{{ $css := resources.Get $scss | toCSS (dict "enableSourceMap" false) | postCSS | minify | fingerprint }}
+<link rel="preload" href="{{ $css.RelPermalink }}" as="style">
+<link href="{{ $css.RelPermalink }}" rel="stylesheet" integrity="{{ $css.Data.integrity }}">
+{{ end }}
--- a/layouts/partials/navbar.html
+++ b/layouts/partials/navbar.html
@ -0,0 +1,54 @@
+{{/*
+
+  A copy of the navbar.html partial in Docsy, only modified
+	to include the spec version, which is calculated using an
+  inline `version-string` partial.
+
+*/}}
+
+{{ $cover := .HasShortcode "blocks/cover" }}
+<nav class="js-navbar-scroll navbar navbar-expand navbar-light {{ if $cover}} td-navbar-cover {{ end }}flex-column flex-md-row td-navbar">
+        <a class="navbar-brand" href="{{ .Site.Home.RelPermalink }}">
+		<span class="navbar-logo">{{ with resources.Get "icons/logo.svg" }}{{ ( . | minify).Content | safeHTML }}{{ end }}</span><span class="font-weight-bold">specification</span><span class="navbar-version"> &mdash; {{ partial "version-string" . }}</span>
+	</a>
+	<div class="td-navbar-nav-scroll ml-md-auto" id="main_navbar">
+		<ul class="navbar-nav mt-2 mt-lg-0">
+
+			<li class="nav-item mr-4 mb-2 mb-lg-0"><a href="https://matrix.org/foundation/">Foundation</a>
+			</li>
+
+      <li class="nav-item mr-4 mb-2 mb-lg-0"><a href="https://matrix.org/faq/">FAQs</a>
+			</li>
+
+      <li class="nav-item mr-4 mb-2 mb-lg-0"><a href="https://matrix.org/blog/posts">Blog</a>
+      </li>
+
+			{{ if  .Site.Params.versions }}
+			<li class="nav-item dropdown d-none d-lg-block">
+				{{ partial "navbar-version-selector.html" . }}
+			</li>
+			{{ end }}
+			{{ if  (gt (len .Site.Home.Translations) 0) }}
+			<li class="nav-item dropdown d-none d-lg-block">
+				{{ partial "navbar-lang-selector.html" . }}
+			</li>
+			{{ end }}
+		</ul>
+	</div>
+	<div class="navbar-nav d-none d-lg-block">{{ partial "search-input.html" . }}</div>
+</nav>
+
+
+{{ define "partials/version-string" }}
+    {{ $ret := "unstable version"}}
+
+    {{ $status := .Site.Params.version.status }}
+
+    {{ if ne $status "unstable"}}
+        {{ $version_pieces := slice .Site.Params.version.major_version .Site.Params.version.minor_version .Site.Params.version.patch_version}}
+        {{ $ret = delimit $version_pieces "." }}
+        {{ $ret = delimit (slice "version" $ret) " " }}
+    {{ end }}
+
+    {{ return $ret }}
+{{ end }}
--- a/layouts/partials/sidebar-tree.html
+++ b/layouts/partials/sidebar-tree.html
@ -0,0 +1,63 @@
+{{/*
+
+  A copy of the sidebar-tree.html partial in Docsy, with a few small modifications:
+
+  * include `div#toc` for the ToC
+  * start the sidebar at the root (homepage) since for us that is the Matrix
+  overview page
+  * omit module pages, which we don't want to be directly accessible
+  (we only use them as raw material for the client-server spec)
+
+*/}}
+
+{{/* We cache this partial for bigger sites and set the active class client side. */}}
+{{ $shouldDelayActive := ge (len .Site.Pages) 2000 }}
+<div id="td-sidebar-menu" class="td-sidebar__inner{{ if $shouldDelayActive }} d-none{{ end }}">
+  <div id="content-mobile">
+  <form class="td-sidebar__search d-flex align-items-center">
+    {{ partial "search-input.html" . }}
+    <button class="btn btn-link td-sidebar__toggle d-md-none p-0 ml-3 fas fa-bars" type="button" data-toggle="collapse" data-target="#td-section-nav" aria-controls="td-docs-nav" aria-expanded="false" aria-label="Toggle section navigation">
+    </button>
+  </form>
+  </div>
+  <div id="content-desktop"></div>
+  <nav class="collapse td-sidebar-nav" id="td-section-nav">
+    {{ template "section-tree-nav-section" (dict "page" . "section" .Site.Home.CurrentSection "delayActive" $shouldDelayActive "indent" 0)  }}
+    <hr/>
+    <div id = "toc"></div>
+  </nav>
+</div>
+
+{{ define "section-tree-nav-section" }}
+    {{ $s := .section }}
+    {{ $p := .page }}
+    {{ $shouldDelayActive := .delayActive }}
+    {{ $indent := .indent }}
+    {{ $active := eq $p.RelPermalink $s.RelPermalink }}
+    {{ $show := or ($p.IsAncestor $s) ($p.IsDescendant $s) }}
+    {{ $sid := $s.RelPermalink | anchorize }}
+<ul class="td-sidebar-nav__section pr-md-3">
+  <li class="td-sidebar-nav__section-title">
+    <a  href="{{ $s.RelPermalink }}" class="align-left pl-0 pr-2{{ if not $show }} collapsed{{ end }}{{ if $active}} active{{ end }} td-sidebar-link td-sidebar-link__section indent-{{$indent}}">{{ $s.LinkTitle }}</a>
+    {{ $pages := where (union $s.Pages $s.Sections).ByWeight ".Params.toc_hide" "!=" true }}
+    {{ $pages = where $pages "Type" "!=" "module"}}
+    {{ $pages := $pages | first 50 }}
+    {{ if gt (len $pages) 0 }}
+    <ul>
+        {{ range $pages }}
+            {{ if .IsPage }}
+                {{ $mid := printf "m-%s" (.RelPermalink | anchorize) }}
+                {{ $active := eq . $p }}
+      <li class="collapse {{ if $show }}show{{ end }}" id="{{ $sid }}">
+        <a class="td-sidebar-link td-sidebar-link__page {{ if and (not $shouldDelayActive) $active }} active{{ end }} indent-{{add $indent 1}}" id="{{ $mid }}" href="{{ .RelPermalink }}">{{ .LinkTitle }}</a>
+      </li>
+            {{ else }}
+                {{ $indent := add $indent 1 }}
+                {{ template "section-tree-nav-section" (dict "page" $p "section" . "indent" $indent) }}
+            {{ end }}
+        {{ end }}
+    </ul>
+    {{ end }}
+  </li>
+</ul>
+{{ end }}
--- a/layouts/partials/version-banner.html
+++ b/layouts/partials/version-banner.html
@ -0,0 +1,22 @@
+{{/*
+
+  A modified copy of the version-banner.html partial in Docsy.
+
+*/}}
+
+
+{{ $color := "primary" }}
+{{ $status := .Site.Params.version.status }}
+{{ $latest_version := .Site.Params.version.current_version_url }}
+{{ if eq $status "unstable"}}
+<div class="pageinfo pageinfo-{{ $color }} pageinfo-unstable">
+  <p>You're looking at an unstable version of this specification.
+  Unstable specifications may change at any time without notice.</p>
+  <p><a href="{{ $latest_version | safeURL }}">Switch to the current stable release</a>.</p>
+</div>
+{{ else if eq $status "historical" }}
+<div class="pageinfo pageinfo-{{ $color }}">
+  <p>You're looking at an old version of this specification.<p>
+  <p><a href="{{ $latest_version | safeURL }}">Switch to the current stable release</a>.</p>
+</div>
+{{ end }}
--- a/package-lock.json
+++ b/package-lock.json
@ -0,0 +1,978 @@
+{
+  "name": "matrix-spec",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
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+      "dev": true
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+      }
+    },
+    "@types/color-name": {
+      "version": "1.1.1",
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+        "is-fullwidth-code-point": "^3.0.0",
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+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
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+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
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+      }
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+    "universalify": {
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+    },
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+      "dev": true
+    },
+    "wrap-ansi": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
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+      "requires": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
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+        "ansi-styles": {
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+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
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+          "dev": true,
+          "requires": {
+            "@types/color-name": "^1.1.1",
+            "color-convert": "^2.0.1"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
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+          "dev": true,
+          "requires": {
+            "color-name": "~1.1.4"
+          }
+        },
+        "color-name": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+          "dev": true
+        }
+      }
+    },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
+      "dev": true
+    },
+    "yargs": {
+      "version": "15.4.1",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-15.4.1.tgz",
+      "integrity": "sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==",
+      "dev": true,
+      "requires": {
+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    }
+  }
+}
--- a/package.json
+++ b/package.json
@ -0,0 +1,24 @@
+{
+  "name": "matrix-spec",
+  "version": "0.0.1",
+  "description": "Hugo theme for the Matrix specification.",
+  "main": "none.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/matrix-org/matrix-doc.git"
+  },
+  "author": "",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/matrix-org/matrix-doc"
+  },
+  "homepage": "https://github.com/matrix-org/matrix-doc#readme",
+  "dependencies": {},
+  "devDependencies": {
+    "autoprefixer": "^9.8.6",
+    "postcss-cli": "^7.1.2"
+  }
+}
--- a/static/icons/unstable.png
+++ b/static/icons/unstable.png
--- a/static/js/toc.js
+++ b/static/js/toc.js
@ -0,0 +1,301 @@
+  /*
+  Account for id attributes that are in the sidebar nav
+  */
+  function populateIds() {
+    const navItems = document.querySelectorAll(".td-sidebar-nav li");
+    return Array.from(navItems).map(item => item.id).filter(id => id != "");
+  }
+
+  /*
+  Given an ID and an array of IDs, return s version of the original ID that's
+  not equal to any of the IDs in the array.
+  */
+  function uniquifyHeadingId(id, uniqueIDs) {
+    const baseId = id;
+    let counter = 0;
+    while (uniqueIDs.includes(id)) {
+      counter = counter + 1;
+      id = baseId + "-" + counter.toString();
+    }
+    return id;
+  }
+
+  /*
+  Given an array of heading nodes, ensure they all have unique IDs.
+
+  We have to do this mostly because of client-server modules, which are
+  rendered separately then glued together with a template.
+  Because heading IDs are generated in rendering, this means they can and will
+  end up with duplicate IDs.
+  */
+  function uniquifyHeadingIds(headings) {
+    const uniqueIDs = populateIds();
+    for (let heading of headings) {
+      const uniqueID = uniquifyHeadingId(heading.id, uniqueIDs);
+      uniqueIDs.push(uniqueID);
+      heading.id = uniqueID;
+    }
+  }
+
+  /*
+  The document contains "normal" headings, and these have corresponding items
+  in the ToC.
+
+  The document might also contain H1 headings that act as titles for blocks of
+  rendered data, like HTTP APIs or event schemas. Unlike "normal" headings,
+  these headings don't appear in the ToC. But they do have anchor IDs to enable
+  links to them. When someone follows a link to one of these "rendered data"
+  headings we want to scroll the ToC to the item corresponding to the "normal"
+  heading preceding the "rendered data" heading we have visited.
+
+  To support this we need to add `data` attributes to ToC items.
+  These attributes identify which "rendered data" headings live underneath
+  the heading corresponding to that ToC item.
+  */
+  function setTocItemChildren(toc, headings) {
+    let tocEntryForHeading  = null;
+    for (const heading of headings) {
+      // H1 headings are rendered-data headings
+      if (heading.tagName !== "H1") {
+        tocEntryForHeading = document.querySelector(`nav li a[href="#${heading.id}"]`);
+      } else {
+        // on the ToC entry for the parent heading,
+        // set a data-* attribute whose name is the child's fragment ID
+        tocEntryForHeading.setAttribute(`data-${heading.id}`, "true");
+      }
+    }
+  }
+
+  /*
+  Generate a table of contents based on the headings in the document.
+  */
+  function makeToc() {
+
+    // make the title from the H1
+    const h1 = document.body.querySelector("h1");
+    const title = document.createElement("a");
+    title.id = "toc-title";
+    title.setAttribute("href", "#");
+    title.textContent = h1.textContent;
+
+    // make the content
+    const content = document.body.querySelector(".td-content");
+    let headings = [].slice.call(content.querySelectorAll("h2, h3, h4, h5, h6, .rendered-data > details > summary > h1"));
+
+    // exclude headings that don't have IDs.
+    headings = headings.filter(heading => heading.id);
+    uniquifyHeadingIds(headings);
+
+    // exclude .rendered-data > h1 headings from the ToC
+    const tocTargets = headings.filter(heading => heading.tagName !== "H1");
+
+    // we have to adjust heading IDs to ensure that they are unique
+    const nav = document.createElement("nav");
+    nav.id = "TableOfContents";
+
+    const section = makeTocSection(tocTargets, 0);
+    nav.appendChild(section.content);
+    // append title and content to the #toc placeholder
+    const toc = document.body.querySelector("#toc");
+    toc.appendChild(title);
+    toc.appendChild(nav);
+
+    // tell ToC items about any rendered-data headings they contain
+    setTocItemChildren(section.content, headings);
+  }
+
+  // create a single ToC entry
+  function makeTocEntry(heading) {
+    const li = document.createElement("li");
+    const a = document.createElement("a");
+    a.setAttribute("href", `#${heading.id}`);
+    a.textContent = heading.textContent;
+    li.appendChild(a);
+    return li;
+  }
+
+  /*
+  Each ToC section is an `<ol>` element.
+  ToC entries are `<li>` elements and these contain nested ToC sections,
+  whenever we go to the next heading level down.
+  */
+  function makeTocSection(headings, index) {
+    const ol = document.createElement("ol");
+    let previousHeading = null;
+    let previousLi = null;
+    let i = index;
+    const lis = [];
+
+    for (i; i < headings.length; i++) {
+      const thisHeading = headings[i];
+      if (previousHeading && (thisHeading.tagName > previousHeading.tagName)) {
+        // we are going down a heading level, create a new nested section
+        const section = makeTocSection(headings, i);
+        previousLi.appendChild(section.content);
+        i = section.index -1;
+      }
+      else if (previousHeading && (previousHeading.tagName > thisHeading.tagName)) {
+        // we have come back up a level, so a section is finished
+        for (let li of lis) {
+          ol.appendChild(li);
+        }
+        return {
+          content: ol,
+          index: i
+        }
+      }
+      else {
+        // we are still processing this section, so add this heading to the current section
+        previousLi = makeTocEntry(thisHeading);
+        lis.push(previousLi);
+        previousHeading = thisHeading;
+      }
+    }
+    for (let li of lis) {
+      ol.appendChild(li);
+    }
+    return  {
+      content: ol,
+      index: i
+    }
+  }
+
+  /*
+  Set a new ToC entry.
+  Clear any previously highlighted ToC items, set the new one,
+  and adjust the ToC scroll position.
+  */
+  function setTocEntry(newEntry) {
+    const activeEntries = document.querySelectorAll("#toc a.active");
+    for (const activeEntry of activeEntries) {
+      activeEntry.classList.remove('active');
+    }
+
+    newEntry.classList.add('active');
+
+    // don't scroll the sidebar nav if the main content is not scrolled
+    const nav = document.querySelector("#td-section-nav");
+    const content = document.querySelector("html");
+    if (content.scrollTop !== 0) {
+      nav.scrollTop = newEntry.offsetTop - 100;
+    } else {
+      nav.scrollTop = 0;
+    }
+  }
+
+  /*
+  Test whether a node is in the viewport
+  */
+  function isInViewport(node) {
+    const rect = node.getBoundingClientRect();
+
+    return (
+      rect.top >= 0 &&
+      rect.left >= 0 &&
+      rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
+      rect.right <= (window.innerWidth || document.documentElement.clientWidth)
+    );
+  }
+
+  /*
+  The callback we pass to the IntersectionObserver constructor.
+
+  Called when any of our observed nodes starts or stops intersecting
+  with the viewport.
+  */
+  function handleIntersectionUpdate(entries) {
+
+    /*
+    Special case: If the current URL hash matches a ToC entry, and
+    the corresponding heading is visible in the viewport, then that is
+    made the current ToC entry, and we don't even look at the intersection
+    observer data.
+    This means that if the user has clicked on a ToC entry,
+    we won't unselect it through the intersection observer.
+    */
+    const hash = document.location.hash;
+    if (hash) {
+      let tocEntryForHash = document.querySelector(`nav li a[href="${hash}"]`);
+      // if the hash isn't a direct match for a ToC item, check the data attributes
+      if (!tocEntryForHash) {
+        const fragment = hash.substring(1);
+        tocEntryForHash = document.querySelector(`nav li a[data-${fragment}]`);
+      }
+      if (tocEntryForHash) {
+        const headingForHash = document.querySelector(hash);
+        if (headingForHash && isInViewport(headingForHash)) {
+          setTocEntry(tocEntryForHash);
+          return;
+        }
+      }
+    }
+
+    let newEntry = null;
+
+    for (const entry of entries) {
+      if (entry.intersectionRatio > 0) {
+        const heading = entry.target;
+        /*
+        This sidebar nav consists of two sections:
+        * at the top, a sitenav containing links to other pages
+        * under that, the ToC for the current page
+
+        Since the sidebar scrolls to match the document position,
+        the sitenav will tend to scroll off the screen.
+
+        If the user has scrolled up to (or near) the top of the page,
+        we want to show the sitenav so.
+
+        So: if the H1 (title) for the current page has started
+        intersecting, then always scroll the sidebar back to the top.
+        */
+        if (heading.tagName === "H1" && heading.parentNode.tagName === "DIV") {
+          const nav = document.querySelector("#td-section-nav");
+          nav.scrollTop = 0;
+          return;
+        }
+        /*
+        Otherwise, get the ToC entry for the first entry that
+        entered the viewport, if there was one.
+        */
+        const id = entry.target.getAttribute('id');
+        let tocEntry = document.querySelector(`nav li a[href="#${id}"]`);
+        // if the id isn't a direct match for a ToC item,
+        // check the ToC entry's `data-*` attributes
+        if (!tocEntry) {
+          tocEntry = document.querySelector(`nav li a[data-${id}]`);
+        }
+        if (tocEntry && !newEntry) {
+          newEntry = tocEntry;
+        }
+      }
+    }
+
+    if (newEntry) {
+      setTocEntry(newEntry);
+      return;
+    }
+  }
+
+  /*
+  Track when headings enter the viewport, and use this to update the highlight
+  for the corresponding ToC entry.
+  */
+  window.addEventListener('DOMContentLoaded', () => {
+
+    makeToc();
+
+    const toc = document.querySelector("#toc");
+    toc.addEventListener("click", event => {
+      if (event.target.tagName === "A") {
+        setTocEntry(event.target);
+      }
+    });
+
+    const observer = new IntersectionObserver(handleIntersectionUpdate);
+
+    document.querySelectorAll("h1, h2, h3, h4, h5, h6").forEach((section) => {
+      observer.observe(section);
+    });
+
+  });
--- a/themes/docsy
+++ b/themes/docsy
@ -0,0 +1 @@
+Subproject commit b7562e9cb99c652ebb5ade75d2203db08ad81ede
				`@ -0,0 +1 @@`
				`Subproject commit b7562e9cb99c652ebb5ade75d2203db08ad81ede`