braintrustdata · Luca Forstner (lforst) · Jul 15, 2026 · Jul 16, 2026 · Jul 16, 2026 · Jul 16, 2026
diff --git a/.changeset/quiet-harness-traces.md b/.changeset/quiet-harness-traces.md
@@ -0,0 +1,5 @@
+---
+"braintrust": minor
+---
+
+feat(ai-sdk): Add HarnessAgent tracing support
diff --git a/e2e/config/pr-comment-scenarios.json b/e2e/config/pr-comment-scenarios.json
@@ -444,6 +444,21 @@
       }
     ]
   },
+  {
+    "scenarioDirName": "ai-sdk-harness-instrumentation",
+    "label": "AI SDK Harness Instrumentation",
+    "metadataScenario": "ai-sdk-harness-instrumentation",
+    "variants": [
+      {
+        "variantKey": "ai-sdk-harness-v1",
+        "label": "v1 pinned"
+      },
+      {
+        "variantKey": "ai-sdk-harness-v1-latest",
+        "label": "v1 latest"
+      }
+    ]
+  },
   {
     "scenarioDirName": "claude-agent-sdk-instrumentation",
     "label": "Claude Agent SDK Instrumentation",

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diff --git a/e2e/scenarios/ai-sdk-harness-instrumentation/__cassettes__/ai-sdk-harness-v1.cassette.json b/e2e/scenarios/ai-sdk-harness-instrumentation/__cassettes__/ai-sdk-harness-v1.cassette.json