diff --git a/AGENTS.md b/AGENTS.md
index 96776a3fae7..b25508b69b2 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -217,6 +217,7 @@ See `CLAUDE.md` and the `Makefile` for standard commands. Key notes:
 - The `--timeout` pytest flag is NOT available; don't pass it.
 - Unit tests: `poetry run pytest tests/test_litellm/ -x -vv -n 4`
 - Black `--check` may report pre-existing formatting issues; this does not block test runs.
+- Some test files under `tests/test_litellm/proxy/client/` may fail to collect due to the `responses` module lazy-loading behavior; ignore or skip those directories if collection errors appear.
 
 ### Lint
 
diff --git a/dev_config.yaml b/dev_config.yaml
new file mode 100644
index 00000000000..805a85300d8
--- /dev/null
+++ b/dev_config.yaml
@@ -0,0 +1,13 @@
+model_list:
+  - model_name: fake-openai-endpoint
+    litellm_params:
+      model: openai/my-fake-model
+      api_key: fake-key
+      api_base: https://exampleopenaiendpoint-production.up.railway.app/
+
+general_settings:
+  master_key: sk-1234
+
+litellm_settings:
+  drop_params: True
+  telemetry: False