diff --git a/out/github-action.cjs b/out/github-action.cjs
index f569230..754ebc0 100644
--- a/out/github-action.cjs
+++ b/out/github-action.cjs
@@ -18916,10 +18916,10 @@ Support boolean input list: \`true | True | TRUE | false | False | FALSE\``);
       command_1.issueCommand("error", utils_1.toCommandProperties(properties), message instanceof Error ? message.toString() : message);
     }
     exports2.error = error2;
-    function warning(message, properties = {}) {
+    function warning2(message, properties = {}) {
       command_1.issueCommand("warning", utils_1.toCommandProperties(properties), message instanceof Error ? message.toString() : message);
     }
-    exports2.warning = warning;
+    exports2.warning = warning2;
     function notice(message, properties = {}) {
       command_1.issueCommand("notice", utils_1.toCommandProperties(properties), message instanceof Error ? message.toString() : message);
     }
@@ -93624,12 +93624,13 @@ async function getCommitDiff(commitSha) {
         commitSha,
         "diff"
       );
-      return {
-        sha: commitSha,
-        diff: response.data
-      };
+      const diff2 = response.data ?? "";
+      if (!diff2) {
+        core.warning(`No diff data for commit ${commitSha}`);
+      }
+      return { sha: commitSha, diff: diff2 };
     } catch (error2) {
-      core.error(`Failed to fetch Gitea/Forgejo commit diff: ${error2}`);
+      core.error(`Error fetching Gitea/Forgejo diff for ${commitSha}: ${error2}`);
       throw error2;
     }
   }
@@ -93639,12 +93640,14 @@ async function getCommitDiff(commitSha) {
       owner,
       repo,
       ref: commitSha,
-      headers: {
-        Accept: "application/vnd.github.v3.diff"
-      }
+      headers: { Accept: "application/vnd.github.v3.diff" }
     }
   );
-  return { sha: commitSha, diff: diffResponse.data };
+  const diff = diffResponse.data ?? "";
+  if (!diff) {
+    core.warning(`No diff data from GitHub for commit ${commitSha}`);
+  }
+  return { sha: commitSha, diff };
 }
 async function improveMessagesInChunks(diffsAndSHAs) {
   const chunkSize = diffsAndSHAs.length % 2 === 0 ? 4 : 3;
diff --git a/src/github-action.ts b/src/github-action.ts
index 95d446e..f2049d0 100644
--- a/src/github-action.ts
+++ b/src/github-action.ts
@@ -48,34 +48,36 @@ async function getCommitDiff(commitSha: string): Promise<{ sha: SHA; diff: Diff
         'diff'
       );
 
-      return {
-        sha: commitSha,
-        diff: response.data,
-      };
+      const diff = response.data ?? '';
+      if (!diff) {
+        core.warning(`No diff data for commit ${commitSha}`);
+      }
+
+      return { sha: commitSha, diff };
     } catch (error) {
-      core.error(`Failed to fetch Gitea/Forgejo commit diff: ${error}`);
+      core.error(`Error fetching Gitea/Forgejo diff for ${commitSha}: ${error}`);
       throw error;
     }
   }
 
-  // GitHub path unchanged
   const diffResponse = await octokit.request<string>(
     'GET /repos/{owner}/{repo}/commits/{ref}',
     {
       owner,
       repo,
       ref: commitSha,
-      headers: {
-        Accept: 'application/vnd.github.v3.diff',
-      },
+      headers: { Accept: 'application/vnd.github.v3.diff' },
     }
   );
 
-  return { sha: commitSha, diff: diffResponse.data };
+  const diff = diffResponse.data ?? '';
+  if (!diff) {
+    core.warning(`No diff data from GitHub for commit ${commitSha}`);
+  }
+
+  return { sha: commitSha, diff };
 }
 
-
-
 interface DiffAndSHA {
   sha: SHA;
   diff: Diff;