diff --git a/stack.env b/stack.env
new file mode 100644
index 0000000..c126740
--- /dev/null
+++ b/stack.env
@@ -0,0 +1,6 @@
+POSTGRES_USER=mtg
+POSTGRES_DB=mtg
+REDIS_URL=redis://cache:6379
+ANTHROPIC_MODEL=claude-sonnet-4-6
+SCRYFALL_RATE_LIMIT_RPS=8
+SCRYFALL_CACHE_TTL_SECONDS=86400
\ No newline at end of file