diff --git a/agent.py b/agent.py
index fcca3ef..51af514 100644
--- a/agent.py
+++ b/agent.py
@@ -702,12 +702,16 @@ async def _write_workspace_text(ctx: RunContext[NoAuth], path: str, text: str, m
     if len(data) > MAX_TEXT_BYTES * 4:
         raise ValueError("artifact exceeds bounded text size")
     ws = ctx.workspace
-    if hasattr(ws, "write_bytes"):
-        ws.write_bytes(clean, data)  # type: ignore[attr-defined]
+    if hasattr(ws, "is_writable_output") and ws.is_writable_output(clean):  # type: ignore[attr-defined]
+        if hasattr(ws, "write_bytes"):
+            ws.write_bytes(clean, data)  # type: ignore[attr-defined]
+        else:
+            view = await ws.open_view(purpose=f"write {clean}", hints=[clean], max_files=1, mode=WorkspaceMode.READ_WRITE_OVERLAY, reason="Persist integration engineering output under outputs/integrations")
+            await view.write(clean, data)
     else:
-        view = await ws.open_view(purpose=f"write {clean}", hints=[clean], max_files=1, mode=WorkspaceMode.READ_WRITE_OVERLAY, reason="Persist integration engineering output under outputs/integrations")
-        await view.write(clean, data)
-    ref = await ctx.write_artifact(clean.split("/")[-1], data, mime_type)
+        raise PermissionError("workspace grant does not allow writes under outputs/integrations")
+    artifact_name = clean.replace("/", "__")
+    ref = await ctx.write_artifact(artifact_name, data, mime_type)
     await ctx.emit_artifact(ref)
     return ArtifactRecord(path=clean, sha256=hashlib.sha256(data).hexdigest(), size_bytes=len(data), mime_type=mime_type)