add re2 configuration
diff --git a/buildkite/pipelines/re2-postsubmit.json b/buildkite/pipelines/re2-postsubmit.json
new file mode 100644
index 0000000..e927657
--- /dev/null
+++ b/buildkite/pipelines/re2-postsubmit.json
@@ -0,0 +1,8 @@
+{
+  "platforms": {
+    "ubuntu1404": {"build_targets": ["..."], "test_targets": ["..."]},
+    "ubuntu1604": {"build_targets": ["..."], "test_targets": ["..."]},
+    "macos": {"build_targets": ["..."], "test_targets": ["..."]}
+  }
+}
+