diff --git a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
index f402180..67bf96f 100644
--- a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
+++ b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
@@ -3,6 +3,7 @@
 
 // Type-wise naive solution for specifying user messages.
 // A mechanism that will check the message for correct formatting and validate parameters is needed
+// TODO: make UserMessage serializable
 case class UserMessage(id: MessageId, args: Any*)
 
 object UserMessage:

diff --git a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
index f402180..67bf96f 100644
--- a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
+++ b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
@@ -3,6 +3,7 @@
 
 // Type-wise naive solution for specifying user messages.
 // A mechanism that will check the message for correct formatting and validate parameters is needed
+// TODO: make UserMessage serializable
 case class UserMessage(id: MessageId, args: Any*)
 
 object UserMessage:
diff --git a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
index 32982f4..79aef16 100644
--- a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
+++ b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
@@ -11,7 +11,9 @@
   def messages: js.Dictionary[String]
 
   override def get(id: MessageId): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     messages.get(id.toString)
 
   override def get(msg: UserMessage): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     get(msg.id).map(_.format(msg.args: _*))

diff --git a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
index f402180..67bf96f 100644
--- a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
+++ b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
@@ -3,6 +3,7 @@
 
 // Type-wise naive solution for specifying user messages.
 // A mechanism that will check the message for correct formatting and validate parameters is needed
+// TODO: make UserMessage serializable
 case class UserMessage(id: MessageId, args: Any*)
 
 object UserMessage:
diff --git a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
index 32982f4..79aef16 100644
--- a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
+++ b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
@@ -11,7 +11,9 @@
   def messages: js.Dictionary[String]
 
   override def get(id: MessageId): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     messages.get(id.toString)
 
   override def get(msg: UserMessage): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     get(msg.id).map(_.format(msg.args: _*))
diff --git a/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
new file mode 100644
index 0000000..046b651
--- /dev/null
+++ b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
@@ -0,0 +1,7 @@
+package works.iterative.ui.components.dashboard.tailwind
+
+import com.raquo.laminar.api.L.{*, given}
+
+object Dashboard:
+  def number(n: Int, color: String, t: String) =
+    span(cls(color), title(t), s"$n")

diff --git a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
index f402180..67bf96f 100644
--- a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
+++ b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
@@ -3,6 +3,7 @@
 
 // Type-wise naive solution for specifying user messages.
 // A mechanism that will check the message for correct formatting and validate parameters is needed
+// TODO: make UserMessage serializable
 case class UserMessage(id: MessageId, args: Any*)
 
 object UserMessage:
diff --git a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
index 32982f4..79aef16 100644
--- a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
+++ b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
@@ -11,7 +11,9 @@
   def messages: js.Dictionary[String]
 
   override def get(id: MessageId): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     messages.get(id.toString)
 
   override def get(msg: UserMessage): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     get(msg.id).map(_.format(msg.args: _*))
diff --git a/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
new file mode 100644
index 0000000..046b651
--- /dev/null
+++ b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
@@ -0,0 +1,7 @@
+package works.iterative.ui.components.dashboard.tailwind
+
+import com.raquo.laminar.api.L.{*, given}
+
+object Dashboard:
+  def number(n: Int, color: String, t: String) =
+    span(cls(color), title(t), s"$n")
diff --git a/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala b/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala
new file mode 100644
index 0000000..29287ba
--- /dev/null
+++ b/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala
@@ -0,0 +1,12 @@
+package works.iterative.ui.model
+
+import works.iterative.core.UserMessage
+
+/** A class representing the states of a model that needs computation
+  */
+// TODO: move to core when stable
+enum Computable[Model]:
+  case Uninitialized extends Computable[Nothing]
+  case Computing extends Computable[Nothing]
+  case Ready(model: Model) extends Computable[Model]
+  case Failed(error: UserMessage) extends Computable[Nothing]

diff --git a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
index f402180..67bf96f 100644
--- a/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
+++ b/core/shared/src/main/scala/works/iterative/core/UserMessage.scala
@@ -3,6 +3,7 @@
 
 // Type-wise naive solution for specifying user messages.
 // A mechanism that will check the message for correct formatting and validate parameters is needed
+// TODO: make UserMessage serializable
 case class UserMessage(id: MessageId, args: Any*)
 
 object UserMessage:
diff --git a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
index 32982f4..79aef16 100644
--- a/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
+++ b/ui/components/src/main/scala/works/iterative/ui/JsonMessageCatalogue.scala
@@ -11,7 +11,9 @@
   def messages: js.Dictionary[String]
 
   override def get(id: MessageId): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     messages.get(id.toString)
 
   override def get(msg: UserMessage): Option[String] =
+    assume(messages != null, "Message catalogue must not be null")
     get(msg.id).map(_.format(msg.args: _*))
diff --git a/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
new file mode 100644
index 0000000..046b651
--- /dev/null
+++ b/ui/components/src/main/scala/works/iterative/ui/components/dashboard/tailwind/Dashboard.scala
@@ -0,0 +1,7 @@
+package works.iterative.ui.components.dashboard.tailwind
+
+import com.raquo.laminar.api.L.{*, given}
+
+object Dashboard:
+  def number(n: Int, color: String, t: String) =
+    span(cls(color), title(t), s"$n")
diff --git a/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala b/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala
new file mode 100644
index 0000000..29287ba
--- /dev/null
+++ b/ui/model/src/main/scala/works/iterative/ui/model/Computable.scala
@@ -0,0 +1,12 @@
+package works.iterative.ui.model
+
+import works.iterative.core.UserMessage
+
+/** A class representing the states of a model that needs computation
+  */
+// TODO: move to core when stable
+enum Computable[Model]:
+  case Uninitialized extends Computable[Nothing]
+  case Computing extends Computable[Nothing]
+  case Ready(model: Model) extends Computable[Model]
+  case Failed(error: UserMessage) extends Computable[Nothing]
diff --git a/ui/model/src/main/scala/works/iterative/ui/model/Form.scala b/ui/model/src/main/scala/works/iterative/ui/model/Form.scala
index 9ad7f99..1fa38d0 100644
--- a/ui/model/src/main/scala/works/iterative/ui/model/Form.scala
+++ b/ui/model/src/main/scala/works/iterative/ui/model/Form.scala
@@ -3,6 +3,16 @@
 
 import core.*
 
+// Generic events that can be generated by forms
+// When editing a form, you can
+// - submit the form with some data (might be multiple options)
+// - cancel the form editation
+// - reset the form to its initial state
+enum FormEvent[T]:
+  case Submitted(data: T)
+  case Cancelled extends FormEvent[Nothing]
+  case Reset extends FormEvent[Nothing]
+
 case class FormItem[Value](
     id: String,
     label: PlainOneLine,