diff --git a/README.md b/README.md
index c2b6f16..0d89821 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,25 @@ See the `Containerfile` for more details.
 You are of course also free to fork, customize, and build base images yourself.
 See this page[6] of the documentation for more information.
 
+## Tiers
+
+There are currently 3 tiers:
+- **tier-0**: This image is more of a convenient centralization point for CI
+  and curation around a package set that we can all agree is the rough minimum
+  necessary for a usable system. It's not meant to be used as is, but layered
+  upon.
+- **tier-1**: This image is much larger and notably includes networking and
+  firmwares. It's a good starting point onto which you can do less
+  customizations to get what you need.
+- **tier-x**: This image is not intended for end-users. It's the shared base
+  used by all image-based Fedora variants (IoT, Atomic Desktops, and CoreOS).
+  Changes to this tier may be done without accounting for external users.
+
+Both **tier-1** and **tier-x** inherit from **tier-0**.
+
+All non-trivial changes to **tier-0** and **tier-x** should be ACKed by at least
+one stakeholder of each Fedora variant WGs.
+
 ## More information
 
 Documentation: <https://docs.fedoraproject.org/en-US/bootc/>
diff --git a/fedora-tier-x.yaml b/fedora-tier-x.yaml
new file mode 100644
index 0000000..19e08c8
--- /dev/null
+++ b/fedora-tier-x.yaml
@@ -0,0 +1,12 @@
+releasever: rawhide
+repos:
+  - rawhide
+
+metadata:
+  name: fedora-boot-tier-x
+  summary: Fedora Bootable Tier X
+
+include:
+  - fedora-generic.yaml
+  - tier-x/manifest.yaml
+  - tier-x/kernel.yaml
diff --git a/tier-x/kernel.yaml b/tier-x/kernel.yaml
new file mode 120000
index 0000000..d6f64cc
--- /dev/null
+++ b/tier-x/kernel.yaml
@@ -0,0 +1 @@
+../tier-0/kernel.yaml
\ No newline at end of file
diff --git a/tier-x/manifest.yaml b/tier-x/manifest.yaml
new file mode 100644
index 0000000..384110b
--- /dev/null
+++ b/tier-x/manifest.yaml
@@ -0,0 +1,46 @@
+include:
+  - ../tier-0/manifest.yaml
+
+packages:
+  # Used by admins interactively
+  - attr
+  - bash-completion
+  - hostname
+  - iproute
+  - jq
+  - less
+  - vim-minimal
+  # crun recommends but doesn't require criu and criu-libs. We want them for
+  # checkpoint/restore. https://github.com/coreos/fedora-coreos-tracker/issues/1370
+  - criu criu-libs
+  # storage
+  - cryptsetup
+  - lvm2
+  - tar
+  # zram-generator (but not zram-generator-defaults) for F33 change
+  # https://github.com/coreos/fedora-coreos-tracker/issues/509
+  - zram-generator
+  # Some host applications(i.e. NetworkManager) use dnsmasq
+  # as the binary for some various utility operations.
+  # https://github.com/coreos/fedora-coreos-tracker/issues/519
+  - dnsmasq
+  # networking
+  - iptables-nft
+  - NetworkManager
+  - openssh-clients
+  - openssh-server
+  - slirp4netns # rootless podman networking
+  - systemd-resolved
+  # linux-firmware now a recommends so let's explicitly include it
+  # https://gitlab.com/cki-project/kernel-ark/-/commit/32271d0cd9bd52d386eb35497c4876a8f041f70b
+  # https://src.fedoraproject.org/rpms/kernel/c/f55c3e9ed8605ff28cb9a922efbab1055947e213?branch=rawhide
+  - linux-firmware
+  # security
+  - polkit
+  - sudo
+  # Allow for configuring different timezones
+  - tzdata
+  # rpm-ostree
+  - rpm-ostree nss-altfiles
+  # firmware updates
+  - fwupd