diff --git a/backend/bin/.gitkeep b/backend/bin/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/backend/internal/db/doc.go b/backend/internal/db/doc.go
new file mode 100644
index 0000000..2e3af65
--- /dev/null
+++ b/backend/internal/db/doc.go
@@ -0,0 +1,3 @@
+// Package db is a Phase 1 placeholder. The pgxpool wiring and sqlc-generated
+// queries land in Plan 01-03 (Foundation Wave 3) and Phase 3 (Tablos schema).
+package db
diff --git a/backend/internal/db/queries/.gitkeep b/backend/internal/db/queries/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/backend/internal/db/sqlc/.gitkeep b/backend/internal/db/sqlc/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/backend/internal/files/doc.go b/backend/internal/files/doc.go
new file mode 100644
index 0000000..9741681
--- /dev/null
+++ b/backend/internal/files/doc.go
@@ -0,0 +1,2 @@
+// Package files is a Phase 1 placeholder; the upload/storage implementation lands in Phase 5.
+package files
diff --git a/backend/internal/session/doc.go b/backend/internal/session/doc.go
new file mode 100644
index 0000000..3a37395
--- /dev/null
+++ b/backend/internal/session/doc.go
@@ -0,0 +1,2 @@
+// Package session is a Phase 1 placeholder; the session/cookie implementation lands in Phase 2.
+package session
diff --git a/backend/internal/tablos/doc.go b/backend/internal/tablos/doc.go
new file mode 100644
index 0000000..0ff3966
--- /dev/null
+++ b/backend/internal/tablos/doc.go
@@ -0,0 +1,2 @@
+// Package tablos is a Phase 1 placeholder; the tablo CRUD implementation lands in Phase 3.
+package tablos
diff --git a/backend/internal/tasks/doc.go b/backend/internal/tasks/doc.go
new file mode 100644
index 0000000..0d697bd
--- /dev/null
+++ b/backend/internal/tasks/doc.go
@@ -0,0 +1,2 @@
+// Package tasks is a Phase 1 placeholder; the kanban task implementation lands in Phase 4.
+package tasks
diff --git a/backend/migrations/.gitkeep b/backend/migrations/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/backend/static/.gitkeep b/backend/static/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/backend/templates/.gitkeep b/backend/templates/.gitkeep
new file mode 100644
index 0000000..e69de29