diff --git a/dist/index.js b/dist/index.js
index ae447a12f7823ec0a00837ee9f0eb809a610d5f8..a3402b2c2d021ef432cfa76e35d370073d525135 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -6578,9 +6578,19 @@ function createOutputTransformStream(output) {
         controller.enqueue({ part: chunk, partialOutput: void 0 });
         return;
       }
-      text2 += chunk.text;
       textChunk += chunk.text;
       textProviderMetadata = (_a21 = chunk.providerMetadata) != null ? _a21 : textProviderMetadata;
+      if (output == null) {
+        // PATCH(docmost #OOM): no output strategy requested -> publish each
+        // text-delta immediately and do NOT build cumulative partialOutput
+        // snapshots. Unpatched, the default text() output snapshots the ENTIRE
+        // accumulated turn text on every delta (O(n^2) memory) and those
+        // snapshots pile up in the never-consumed leftover tee branch of
+        // DefaultStreamTextResult.baseStream -> heap OOM on long agent turns.
+        publishTextChunk({ controller });
+        return;
+      }
+      text2 += chunk.text;
       const result = await output.parsePartialOutput({ text: text2 });
       if (result !== void 0) {
         const currentJson = JSON.stringify(result.partial);
@@ -6959,7 +6969,7 @@ var DefaultStreamTextResult = class {
         })
       );
     }
-    this.baseStream = stream.pipeThrough(createOutputTransformStream(output != null ? output : text())).pipeThrough(eventProcessor);
+    this.baseStream = stream.pipeThrough(createOutputTransformStream(output)).pipeThrough(eventProcessor);
     const { maxRetries, retry } = prepareRetries({
       maxRetries: maxRetriesArg,
       abortSignal
diff --git a/dist/index.mjs b/dist/index.mjs
index 663875332e3f9a9bd167c25583c515876f42951b..b840b0502c9894df983e0154805abb80e70e6331 100644
--- a/dist/index.mjs
+++ b/dist/index.mjs
@@ -6501,9 +6501,19 @@ function createOutputTransformStream(output) {
         controller.enqueue({ part: chunk, partialOutput: void 0 });
         return;
       }
-      text2 += chunk.text;
       textChunk += chunk.text;
       textProviderMetadata = (_a21 = chunk.providerMetadata) != null ? _a21 : textProviderMetadata;
+      if (output == null) {
+        // PATCH(docmost #OOM): no output strategy requested -> publish each
+        // text-delta immediately and do NOT build cumulative partialOutput
+        // snapshots. Unpatched, the default text() output snapshots the ENTIRE
+        // accumulated turn text on every delta (O(n^2) memory) and those
+        // snapshots pile up in the never-consumed leftover tee branch of
+        // DefaultStreamTextResult.baseStream -> heap OOM on long agent turns.
+        publishTextChunk({ controller });
+        return;
+      }
+      text2 += chunk.text;
       const result = await output.parsePartialOutput({ text: text2 });
       if (result !== void 0) {
         const currentJson = JSON.stringify(result.partial);
@@ -6882,7 +6892,7 @@ var DefaultStreamTextResult = class {
         })
       );
     }
-    this.baseStream = stream.pipeThrough(createOutputTransformStream(output != null ? output : text())).pipeThrough(eventProcessor);
+    this.baseStream = stream.pipeThrough(createOutputTransformStream(output)).pipeThrough(eventProcessor);
     const { maxRetries, retry } = prepareRetries({
       maxRetries: maxRetriesArg,
       abortSignal