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server/opencode_environment.py

@@ -317,13 +317,17 @@ class OpenCodeEnvironment(MCPEnvironment):
             if handle is None:
                 return json.dumps({"rollout_id": rollout_id, "aborted": False, "reason": "unknown"})
             aborted = False
-            if handle.session is not None:
-                try:
+            try:
+                if handle.session is not None and handle.session.driver == "serve":
                     aborted = bool(handle.session.abort())
-                except Exception as exc:  # noqa: BLE001
-                    return json.dumps({
-                        "rollout_id": rollout_id, "aborted": False, "reason": str(exc),
-                    })
+                elif handle.session is not None:
+                    # CLI driver: kill the sandbox to stop opencode mid-run.
+                    handle.session.sandbox.kill()
+                    aborted = True
+            except Exception as exc:  # noqa: BLE001
+                return json.dumps({
+                    "rollout_id": rollout_id, "aborted": False, "reason": str(exc),
+                })
             return json.dumps({"rollout_id": rollout_id, "aborted": aborted})
 
         @mcp.tool
@@ -598,7 +602,7 @@ class OpenCodeEnvironment(MCPEnvironment):
                     sandbox_backend=self._E2BSandboxBackend(),
                     mode=mode,
                     verifier=None,
-                    driver="serve",
+                    driver="cli",  # serve is a state store, not an agent runner
                 )
                 handle.session = factory.create(task=task)
                 try: