diff --git a/opencode.json b/opencode.json
new file mode 100644
index 0000000..e3856b6
--- /dev/null
+++ b/opencode.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://opencode.ai/config.json",
+  "lsp": {
+    "expert": {
+      "command": ["expert", "--stdio"],
+      "extensions": [".ex", ".exs"]
+    }
+  }
+}