1 files changed, 70 insertions, 0 deletions
diff --git a/doc/kudos.md b/doc/kudos.md
new file mode 100644
index 0000000..f43aa51
--- /dev/null
+++ b/doc/kudos.md
@@ -0,0 +1,70 @@
+Kudos used in Software
+======================
+
+As part of the AppStream generation process we explode various parts of the
+distro binary package and try to build metadata by merging various sources
+together, for example AppData, desktop files and icons.
+
+As part of this we also have access to the finished binary and libraries, and
+so can also run tools on them to get a metric of awesomeness. So far, the
+metrics of awesomeness (here-on known as "kudos") are:
+
+ * `HiDpiIcon` — installs a 128x128 or larger application icon
+ * `HighContrast` — uses hicontrast or scalable icons for visually impaired users
+ * `ModernToolkit` — uses a modern toolkit like Gtk-3 or QT-5
+ * `Notifications` — registers desktop notifications
+ * `SearchProvider` — provides a search provider for GNOME Shell or KDE Plasma
+ * `UserDocs` — provides user documentation
+
+These attempt to define how tightly the application is integrated with the
+platform, which is usually a pretty good metric of awesomeness. Of course,
+some applications like Blender are an island in terms of integration, but of
+course are awesome.
+
+There are some other "run-time" kudos used as well. These are not encoded by
+the builder as they require some user information or are too specific to
+GNOME Software. These include:
+
+ * `FeaturedRecommended` — One of the design team chose to feature this
+ * `HasKeywords` — there are keywords in the desktop file used for searching
+ * `HasScreenshots` — more than one screenshot is supplied
+ * `MyLanguage` — has a populated translation in my locale, or a locale fallback
+ * `PerfectScreenshots` — screenshots are perfectly sized, in 16:9 aspect
+ * `Popular` — lots of people have downloaded this (only available on Fedora)
+ * `RecentRelease` — there been an upstream release in the last year
+
+You can verify the kudos your application is getting by doing something like:
+
+    killall gnome-software
+    gnome-software --verbose
+
+and then navigating to the details for an application you'll see on the console:
+
+    id-kind:         desktop
+    state:           available
+    id:              blender.desktop
+    kudo:            recent-release
+    kudo:            featured-recommended
+    kudo:            has-screenshots
+    kudo:            popular
+
+Manually Adding Kudos
+---------------------
+
+If the AppStream generator fails to detect a specific kudo then you can add them
+manually in the AppData file and they will be used in the AppStream metadata.
+To do this, just add something like:
+
+    <kudos>
+     <kudo>ModernToolkit</kudo>
+     <kudo>UserDocs</kudo>
+    </kudos>
+
+Although, please bear in mind any application that is found cheating, i.e.
+adding kudos artificially will have **all** the kudos manually removed
+with a blocklist rule in the AppStream builder.
+
+If you are a vendor, or a system distributor and just want to increase the
+number of kudos for your pet proprietary application that's essential to
+business function, a good kudo to manually add would be `FeaturedRecommended`,
+or `GnomeSoftware::popular`.