diff --git a/open-sse/config/credentialLoader.ts b/open-sse/config/credentialLoader.ts
index 4e133ec687..26306ecd3f 100644
--- a/open-sse/config/credentialLoader.ts
+++ b/open-sse/config/credentialLoader.ts
@@ -33,8 +33,11 @@ function credGlobals(): CredGlobals {
 }
 
 /**
- * Resolve the path to provider-credentials.json
- * Priority: DATA_DIR env → ./data (project root)
+ * Resolves the path to provider-credentials.json using the application's
+ * data directory. Delegates to resolveDataDir() which handles DATA_DIR env,
+ * platform-specific defaults, and fallback logic.
+ *
+ * previous: Priority: DATA_DIR env → ./data (project root)
  */
 function resolveCredentialsPath() {
   return join(resolveDataDir(), "provider-credentials.json");
diff --git a/open-sse/transformer/responsesTransformer.ts b/open-sse/transformer/responsesTransformer.ts
index 0d20255682..16c33cb73f 100644
--- a/open-sse/transformer/responsesTransformer.ts
+++ b/open-sse/transformer/responsesTransformer.ts
@@ -40,6 +40,7 @@ export function createResponsesLogger(model, logsDir = null) {
   const timestamp = new Date().toISOString().replace(/[:.]/g, "").slice(0, 15);
   const uniqueId = Math.random().toString(36).slice(2, 8);
   const baseDir = logsDir || (typeof process !== "undefined" ? process.cwd() : ".");
+  // previous: const baseDir = logsDir || resolveDataDir(); — reverted in #555 for Workers compat
   const logDir = path.join(baseDir, "logs", `responses_${model}_${timestamp}_${uniqueId}`);
 
   try {