diff --git a/src/common/event-size-monitor.ts b/src/common/event-size-monitor.ts
new file mode 100644
index 0000000..a60a301
--- /dev/null
+++ b/src/common/event-size-monitor.ts
@@ -0,0 +1,71 @@
+import { ErrorRecord } from '../types/common';
+import { EventData } from '../types/extraction';
+
+const MAX_EVENT_SIZE_BYTES = 200_000;
+const EVENT_SIZE_THRESHOLD_BYTES = Math.floor(MAX_EVENT_SIZE_BYTES * 0.8); // 160_000 bytes
+
+/**
+ * Get the JSON serialized size of event data in bytes
+ */
+export function getEventDataSize(data: EventData | undefined): number {
+  if (!data) return 0;
+  return JSON.stringify(data).length;
+}
+
+/**
+ * Check if event data exceeds the 80% threshold (160KB)
+ */
+export function shouldTriggerSizeLimit(data: EventData | undefined): boolean {
+  return getEventDataSize(data) > EVENT_SIZE_THRESHOLD_BYTES;
+}
+
+/**
+ * Truncate error message to max length (default 1000 chars)
+ */
+export function truncateErrorMessage(
+  error: ErrorRecord | undefined,
+  maxLength: number = 1000
+): ErrorRecord | undefined {
+  if (!error) return undefined;
+
+  return {
+    message: error.message.substring(0, maxLength),
+  };
+}
+
+/**
+ * Prune event data by truncating error messages
+ * Always applied before serialization
+ */
+export function pruneEventData(
+  data: EventData | undefined
+): EventData | undefined {
+  if (!data) return data;
+
+  return {
+    ...data,
+    error: truncateErrorMessage(data.error),
+  };
+}
+
+/**
+ * Log detailed warning when size limit is detected
+ */
+export function logSizeLimitWarning(
+  size: number,
+  triggerType: 'onUpload' | 'onEmit'
+): void {
+  const percentage = (size / MAX_EVENT_SIZE_BYTES) * 100;
+  const detailsString =
+    triggerType === 'onUpload'
+      ? 'during data collection. Emitting progress event and stopping further processing.'
+      : 'during emit. Error messages truncated.';
+
+  console.warn(
+    `[SIZE_LIMIT] Event data size ${size} bytes (${percentage.toFixed(
+      1
+    )}% of ${MAX_EVENT_SIZE_BYTES} limit) detected ${detailsString}`
+  );
+}
+
+export { MAX_EVENT_SIZE_BYTES as MAX_EVENT_SIZE, EVENT_SIZE_THRESHOLD_BYTES as SIZE_LIMIT_THRESHOLD };
diff --git a/src/workers/process-task.ts b/src/workers/process-task.ts
index b7300b0..745d86e 100644
--- a/src/workers/process-task.ts
+++ b/src/workers/process-task.ts
@@ -58,6 +58,15 @@ export function processTask<ConnectorState>({
               })()
           );
           await task({ adapter });
+
+          // If size limit was triggered during task, call onTimeout for cleanup
+          if (adapter.isTimeout) {
+            console.log(
+              '[SIZE_LIMIT] Size limit detected during data collection. Executing onTimeout function for cleanup.'
+            );
+            await onTimeout({ adapter });
+          }
+
           process.exit(0);
         }
       } catch (error) {
diff --git a/src/workers/worker-adapter.ts b/src/workers/worker-adapter.ts
index 028eb91..a64706a 100644
--- a/src/workers/worker-adapter.ts
+++ b/src/workers/worker-adapter.ts
@@ -7,6 +7,11 @@ import {
   STATELESS_EVENT_TYPES,
 } from '../common/constants';
 import { emit } from '../common/control-protocol';
+import {
+  logSizeLimitWarning,
+  pruneEventData,
+  SIZE_LIMIT_THRESHOLD,
+} from '../common/event-size-monitor';
 import { addReportToLoaderReport, getFilesToLoad } from '../common/helpers';
 import { serializeError } from '../logger/logger';
 import { Mappers } from '../mappers/mappers';
@@ -91,6 +96,9 @@ export class WorkerAdapter<ConnectorState> {
   private _mappers: Mappers;
   private uploader: Uploader;
 
+  // Length of the resulting artifact JSON object string.
+  private currentLength: number = 0;
+
   constructor({
     event,
     adapterState,
@@ -149,12 +157,30 @@ export class WorkerAdapter<ConnectorState> {
         itemType: repo.itemType,
         ...(shouldNormalize && { normalize: repo.normalize }),
         onUpload: (artifact: Artifact) => {
+          const newLength = JSON.stringify(artifact).length;
+
           // We need to store artifacts ids in state for later use when streaming attachments
           if (repo.itemType === AIRDROP_DEFAULT_ITEM_TYPES.ATTACHMENTS) {
             this.state.toDevRev?.attachmentsMetadata.artifactIds.push(
               artifact.id
             );
           }
+
+          this.currentLength += newLength;
+
+          // Check for size limit (80% of 200KB = 160KB threshold)
+          if (
+            this.currentLength > SIZE_LIMIT_THRESHOLD &&
+            !this.hasWorkerEmitted
+          ) {
+            logSizeLimitWarning(this.currentLength, 'onUpload');
+
+            // Set timeout flag to trigger onTimeout cleanup after task completes
+            this.handleTimeout();
+
+            // Emit progress event to save state and continue on next iteration
+            void this.emit(ExtractorEventType.ExtractionDataProgress);
+          }
         },
         options: this.options,
       });
@@ -246,11 +272,14 @@ export class WorkerAdapter<ConnectorState> {
     }
 
     try {
+      // Always prune error messages to 1000 chars before emit
+      const prunedData = pruneEventData(data);
+
       await emit({
         eventType: newEventType,
         event: this.event,
         data: {
-          ...data,
+          ...prunedData,
           ...(ALLOWED_EXTRACTION_EVENT_TYPES.includes(
             this.event.payload.event_type
           )