fix(coding-agent): persist bash output on line truncation closes #2852

packages/coding-agent/src/core/bash-executor.ts

@@ -78,6 +78,18 @@ export async function executeBashWithOperations(
 	let tempFileStream: WriteStream | undefined;
 	let totalBytes = 0;
 
+	const ensureTempFile = () => {
+		if (tempFilePath) {
+			return;
+		}
+		const id = randomBytes(8).toString("hex");
+		tempFilePath = join(tmpdir(), `pi-bash-${id}.log`);
+		tempFileStream = createWriteStream(tempFilePath);
+		for (const chunk of outputChunks) {
+			tempFileStream.write(chunk);
+		}
+	};
+
 	const decoder = new TextDecoder();
 
 	const onData = (data: Buffer) => {
@@ -87,13 +99,8 @@ export async function executeBashWithOperations(
 		const text = sanitizeBinaryOutput(stripAnsi(decoder.decode(data, { stream: true }))).replace(/\r/g, "");
 
 		// Start writing to temp file if exceeds threshold
-		if (totalBytes > DEFAULT_MAX_BYTES && !tempFilePath) {
-			const id = randomBytes(8).toString("hex");
-			tempFilePath = join(tmpdir(), `pi-bash-${id}.log`);
-			tempFileStream = createWriteStream(tempFilePath);
-			for (const chunk of outputChunks) {
-				tempFileStream.write(chunk);
-			}
+		if (totalBytes > DEFAULT_MAX_BYTES) {
+			ensureTempFile();
 		}
 
 		if (tempFileStream) {
@@ -126,6 +133,9 @@ export async function executeBashWithOperations(
 
 		const fullOutput = outputChunks.join("");
 		const truncationResult = truncateTail(fullOutput);
+		if (truncationResult.truncated) {
+			ensureTempFile();
+		}
 		const cancelled = options?.signal?.aborted ?? false;
 
 		return {
@@ -144,6 +154,9 @@ export async function executeBashWithOperations(
 		if (options?.signal?.aborted) {
 			const fullOutput = outputChunks.join("");
 			const truncationResult = truncateTail(fullOutput);
+			if (truncationResult.truncated) {
+				ensureTempFile();
+			}
 			return {
 				output: truncationResult.truncated ? truncationResult.content : fullOutput,
 				exitCode: undefined,