diff --git a/src/toolwrapper/devchat.ts b/src/toolwrapper/devchat.ts
index 6111b68..1e643f9 100644
--- a/src/toolwrapper/devchat.ts
+++ b/src/toolwrapper/devchat.ts
@@ -356,9 +356,17 @@ class DevChat {
 				"response_tokens": 1,
 				...parent? {"parent": parent} : {}
 			};
+			const insertValue = JSON.stringify(logData);
+			let insertValueOrFile = insertValue;
+			if (insertValue.length > 4 * 1024) {
+				const tempDir = os.tmpdir();
+				const tempFile = path.join(tempDir, 'devchat_log_insert.json');
+				await fs.promises.writeFile(tempFile, insertValue);
+				insertValueOrFile = tempFile;
+			}
 
 			// build args for log insert
-			const args = ["-m", "devchat", "log", "--insert", JSON.stringify(logData)];
+			const args = ["-m", "devchat", "log", "--insert", insertValueOrFile];
 			
 			const {code, stdout, stderr} = await this.runCommand(args);
 
diff --git a/tools b/tools
index ab2abbd..b80f640 160000
--- a/tools
+++ b/tools
@@ -1 +1 @@
-Subproject commit ab2abbdde678cf757707dc540b81efb465e7b3f5
+Subproject commit b80f6402b6895d022a56598e9285baa39ad92670