diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 1867949d..d4efca0e 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -1,7 +1,13 @@
 name: rust-ci
 on:
-  pull_request: { branches: [main] }
-  push: { branches: [main] }
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "codex-rs/**"
+  push:
+    branches:
+      - main
 
 # For CI, we build in debug (`--profile dev`) rather than release mode so we
 # get signal faster.