diff --git a/docker-compose.yml b/docker-compose.yml
index 8fbbcec..f30286c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,6 +8,11 @@
 # Or for interactive one-shot:
 #   docker compose run --rm devbox
 
+# Pin the project name so named volumes survive directory renames.
+# Without this, Docker Compose derives the project name from the
+# directory basename — renaming the dir orphans all existing volumes.
+name: opencode-devbox
+
 services:
   devbox:
     image: joakimp/opencode-devbox:latest