diff --git a/internal/app/app.go b/internal/app/app.go
index f89fbfe..52021c6 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -1,3 +1,4 @@
+// Package app bootstraps and wires the application dependencies.
 package app
 
 import (
diff --git a/internal/config/config.go b/internal/config/config.go
index 23cc2c5..cde840c 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -1,3 +1,4 @@
+// Package config provides application configuration loading and access.
 package config
 
 import (
diff --git a/internal/observability/log.go b/internal/observability/log.go
index 04d56d0..691e7a6 100644
--- a/internal/observability/log.go
+++ b/internal/observability/log.go
@@ -1,3 +1,4 @@
+// Package observability provides logging and metrics instrumentation.
 package observability
 
 import (