diff --git a/packages/narada-core/src/narada_core/actions/models.py b/packages/narada-core/src/narada_core/actions/models.py
index 900529f..badc434 100644
--- a/packages/narada-core/src/narada_core/actions/models.py
+++ b/packages/narada-core/src/narada_core/actions/models.py
@@ -187,15 +187,19 @@ class AgenticSelectorRequest(BaseModel):
     action: AgenticSelectorAction
     selectors: AgenticSelectors
     fallback_operator_query: str
+    pre_cond: str | None = None
 
     @override
     def model_dump(self) -> dict[str, Any]:
-        return {
+        result = {
             "name": self.name,
             "action": _dump_agentic_selector_action(self.action),
             "selectors": _dump_agentic_selectors(self.selectors),
             "fallback_operator_query": self.fallback_operator_query,
         }
+        if self.pre_cond is not None:
+            result["pre_cond"] = self.pre_cond
+        return result
 
 
 class AgenticSelectorResponse(BaseModel):
diff --git a/packages/narada-pyodide/src/narada/window.py b/packages/narada-pyodide/src/narada/window.py
index 2b820da..dc7dc68 100644
--- a/packages/narada-pyodide/src/narada/window.py
+++ b/packages/narada-pyodide/src/narada/window.py
@@ -795,12 +795,16 @@ async def agentic_selector(
         action: AgenticSelectorAction,
         selectors: AgenticSelectors,
         fallback_operator_query: str,
+        pre_cond: str | None = None,
         # Larger default timeout because Operator can take a bit to run.
         timeout: int | None = 300,
     ) -> AgenticSelectorResponse:
         """Performs an action on an element specified by the given selectors, falling back to using
         the Operator agent if the selectors fail to match a unique element.
 
+        If ``pre_cond`` is provided, it is checked only after selector failure and before the
+        Operator fallback runs. A failed precondition raises ``NaradaError`` and prevents fallback.
+
         Returns AgenticSelectorResponse with the value for 'get_text' and 'get_property' actions,
         otherwise returns None.
         """
@@ -815,6 +819,7 @@ async def agentic_selector(
                 action=action,
                 selectors=selectors,
                 fallback_operator_query=fallback_operator_query,
+                pre_cond=pre_cond,
             ),
             response_model,
             timeout=timeout,
diff --git a/packages/narada/src/narada/window.py b/packages/narada/src/narada/window.py
index b1eb2f2..31f3b83 100644
--- a/packages/narada/src/narada/window.py
+++ b/packages/narada/src/narada/window.py
@@ -730,11 +730,15 @@ async def agentic_selector(
         action: AgenticSelectorAction,
         selectors: AgenticSelectors,
         fallback_operator_query: str,
+        pre_cond: str | None = None,
         # Larger default timeout because Operator can take a bit to run.
         timeout: int | None = 300,
     ) -> AgenticSelectorResponse:
         """Performs an action on an element specified by the given selectors, falling back to using
         the Operator agent if the selectors fail to match a unique element.
+
+        If ``pre_cond`` is provided, it is checked only after selector failure and before the
+        Operator fallback runs. A failed precondition raises ``NaradaError`` and prevents fallback.
         """
         response_model = (
             AgenticSelectorResponse
@@ -746,6 +750,7 @@ async def agentic_selector(
                 action=action,
                 selectors=selectors,
                 fallback_operator_query=fallback_operator_query,
+                pre_cond=pre_cond,
             ),
             response_model=response_model,
             timeout=timeout,