diff --git a/interval/api/doc.go b/interval/api/doc.go
new file mode 100644
index 0000000..b2e8553
--- /dev/null
+++ b/interval/api/doc.go
@@ -0,0 +1,2 @@
+// Package api defines the HTTP control plane of the push service
+package api
diff --git a/interval/api/handler/doc.go b/interval/api/handler/doc.go
new file mode 100644
index 0000000..0f76995
--- /dev/null
+++ b/interval/api/handler/doc.go
@@ -0,0 +1,2 @@
+// Package handler contains HTTP request handlers for the REST API.
+package handler
diff --git a/interval/model/doc.go b/interval/model/doc.go
new file mode 100644
index 0000000..0535f75
--- /dev/null
+++ b/interval/model/doc.go
@@ -0,0 +1,2 @@
+// Package model defines core domain models of the push service.
+package model
diff --git a/interval/server/doc.go b/interval/server/doc.go
new file mode 100644
index 0000000..67aaa4d
--- /dev/null
+++ b/interval/server/doc.go
@@ -0,0 +1,2 @@
+// Package server provides HTTP server abstractions.
+package server