diff --git a/lib/container.sh b/lib/container.sh
index 1fe3f40..3fe271a 100644
--- a/lib/container.sh
+++ b/lib/container.sh
@@ -68,6 +68,9 @@ fi
 # ── Stop stale container ─────────────────────────────────────────────────
 "\$RUNTIME" rm -f "\$CONTAINER_NAME" 2>/dev/null || true
 
+# ── Ensure ~/.anthropic exists (Claude Code stores auth/config here) ─────
+mkdir -p "\$HOME/.anthropic"
+
 # ── Start agents container ───────────────────────────────────────────────
 # Mount project at the same absolute path so host and container paths match.
 # CS Core sets agent working dirs to host paths; the wrapper relays PWD.