diff --git a/examples/critic.py b/examples/critic.py
new file mode 100644
index 0000000..145d444
--- /dev/null
+++ b/examples/critic.py
@@ -0,0 +1,39 @@
+import asyncio
+
+from narada import Narada, CriticConfig
+from pydantic import BaseModel, Field
+
+
+class SearchCriticOutput(BaseModel):
+    search_query_used: str = Field(description="The exact search query the agent used")
+    result_count: int = Field(description="The number of results the agent found")
+
+
+async def main() -> None:
+    # Initialize the Narada client.
+    async with Narada() as narada:
+        window = await narada.open_and_initialize_browser_window()
+
+        # Define a critic that verifies the agent completed the task and extracts
+        # additional structured information from the agent's actions.
+        critic = CriticConfig(
+            prompt=(
+                "Verify that the agent successfully searched Google and found results. "
+                "Extract the exact search query the agent used and the number of results found."
+            ),
+            output_schema=SearchCriticOutput,
+        )
+
+        # Run a task with the critic. After the main agent finishes, the critic
+        # evaluates whether the task was completed successfully.
+        response = await window.agent(
+            prompt='Search Google for "Narada AI" and tell me how many results were found.',
+            critic=critic,
+        )
+
+        print("Agent response:", response.text)
+        print("Critic result:", response.critic_result.validation_passed)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())
diff --git a/packages/narada-core/src/narada_core/actions/critic.py b/packages/narada-core/src/narada_core/actions/critic.py
new file mode 100644
index 0000000..a8a3f23
--- /dev/null
+++ b/packages/narada-core/src/narada_core/actions/critic.py
@@ -0,0 +1,83 @@
+from __future__ import annotations
+
+from typing import Any, Awaitable, Callable
+
+from narada_core.models import Agent, CriticConfig
+from pydantic import BaseModel, create_model
+
+from narada_core.actions.models import AgentUsage, CriticResult
+from narada_core.tracing.model import parse_action_trace
+
+_VALIDATION_VAR = "narada_validation_passed"
+_DEFAULT_CRITIC_PROMPT = (
+    "Using your context about the actions and outcome of the previous agent, "
+    "determine whether its task was completed successfully."
+)
+
+
+async def run_critic(
+    *,
+    dispatch_request: Callable[..., Awaitable[Any]],
+    original_prompt: str,
+    response_content: dict[str, Any],
+    action_trace_raw: list[Any] | None,
+    critic: CriticConfig,
+    time_zone: str,
+    timeout: int,
+) -> CriticResult:
+    output_schema = critic.get("output_schema")
+    if output_schema is not None:
+        combined_fields: dict[str, Any] = {
+            name: (info.annotation, info)
+            for name, info in output_schema.model_fields.items()
+        }
+    else:
+        combined_fields = {}
+    combined_fields[_VALIDATION_VAR] = (bool, ...)
+    CriticOutputModel = create_model("CriticOutput", **combined_fields)
+
+    critic_dispatch_response = await dispatch_request(
+        prompt=critic.get("prompt", _DEFAULT_CRITIC_PROMPT),
+        agent=Agent.PRODUCTIVITY,
+        output_schema=CriticOutputModel,
+        critic_context={
+            "agentPrompt": original_prompt,
+            "agentOutput": response_content["text"],
+            "actionTrace": action_trace_raw or [],
+            "validationVariableName": _VALIDATION_VAR,
+        },
+        mcp_servers=critic.get("mcp_servers"),
+        time_zone=time_zone,
+        timeout=timeout,
+    )
+
+    critic_content = critic_dispatch_response["response"]
+    if critic_content is None:
+        raise ValueError("Critic dispatch returned no response")
+
+    combined_output = critic_content.get("structuredOutput")
+    validation_passed = (
+        bool(getattr(combined_output, _VALIDATION_VAR, False))
+        if combined_output is not None
+        else False
+    )
+
+    structured_output: BaseModel | None = None
+    if output_schema is not None and combined_output is not None:
+        output_dict = combined_output.model_dump()
+        output_dict.pop(_VALIDATION_VAR, None)
+        structured_output = output_schema.model_validate(output_dict)
+
+    critic_action_trace_raw = critic_content.get("actionTrace")
+    critic_action_trace = (
+        parse_action_trace(critic_action_trace_raw)
+        if critic_action_trace_raw is not None
+        else None
+    )
+
+    return CriticResult(
+        validation_passed=validation_passed,
+        structured_output=structured_output,
+        usage=AgentUsage.model_validate(critic_dispatch_response["usage"]),
+        action_trace=critic_action_trace,
+    )
diff --git a/packages/narada-core/src/narada_core/actions/models.py b/packages/narada-core/src/narada_core/actions/models.py
index 358efa5..3b9dfbf 100644
--- a/packages/narada-core/src/narada_core/actions/models.py
+++ b/packages/narada-core/src/narada_core/actions/models.py
@@ -40,6 +40,13 @@ class StructuredOutput(BaseModel, Generic[_StructuredOutputT]):
     content: _StructuredOutputT
 
 
+class CriticResult(BaseModel):
+    validation_passed: bool
+    structured_output: Any
+    usage: AgentUsage
+    action_trace: tracing_model.ActionTrace | None = None
+
+
 class AgentResponse(BaseModel, Generic[_StructuredOutputT]):
     request_id: str
     status: Literal["success", "error", "input-required"]
@@ -51,6 +58,7 @@ class AgentResponse(BaseModel, Generic[_StructuredOutputT]):
     ]
     usage: AgentUsage
     action_trace: tracing_model.ActionTrace | None = None
+    critic_result: CriticResult | None = None
 
 
 class AgenticSelectorClickAction(TypedDict):
diff --git a/packages/narada-core/src/narada_core/models.py b/packages/narada-core/src/narada_core/models.py
index d7d075f..307c7a9 100644
--- a/packages/narada-core/src/narada_core/models.py
+++ b/packages/narada-core/src/narada_core/models.py
@@ -77,6 +77,12 @@ class McpServer(BaseModel):
     selectedTools: list[str] | None = None
 
 
+class CriticConfig(TypedDict, total=False):
+    prompt: str
+    output_schema: type[BaseModel]
+    mcp_servers: list[McpServer]
+
+
 class RemoteDispatchChatHistoryItem(TypedDict):
     role: Literal["user", "assistant"]
     content: str
diff --git a/packages/narada-pyodide/src/narada/__init__.py b/packages/narada-pyodide/src/narada/__init__.py
index 386ed83..ce52c7c 100644
--- a/packages/narada-pyodide/src/narada/__init__.py
+++ b/packages/narada-pyodide/src/narada/__init__.py
@@ -2,7 +2,15 @@
     NaradaError,
     NaradaTimeoutError,
 )
-from narada_core.models import Agent, File, ReasoningEffort, Response, ResponseContent
+from narada_core.actions.models import CriticResult
+from narada_core.models import (
+    Agent,
+    CriticConfig,
+    File,
+    ReasoningEffort,
+    Response,
+    ResponseContent,
+)
 
 from narada.client import Narada
 from narada.utils import download_file, render_html
@@ -17,6 +25,8 @@
     "__version__",
     "Agent",
     "CloudBrowserWindow",
+    "CriticConfig",
+    "CriticResult",
     "download_file",
     "File",
     "LocalBrowserWindow",
diff --git a/packages/narada-pyodide/src/narada/window.py b/packages/narada-pyodide/src/narada/window.py
index 2a74d42..39b3cb2 100644
--- a/packages/narada-pyodide/src/narada/window.py
+++ b/packages/narada-pyodide/src/narada/window.py
@@ -20,6 +20,7 @@
 from urllib.parse import urlencode
 
 from js import AbortController, setTimeout  # type: ignore
+from narada_core.actions.critic import run_critic
 from narada_core.actions.models import (
     AgenticMouseAction,
     AgenticMouseActionRequest,
@@ -30,6 +31,7 @@
     AgentResponse,
     AgentUsage,
     CloseWindowRequest,
+    CriticResult,
     ExtensionActionRequest,
     ExtensionActionResponse,
     GetFullHtmlRequest,
@@ -63,6 +65,7 @@
 )
 from narada_core.models import (
     Agent,
+    CriticConfig,
     File,
     McpServer,
     ReasoningEffort,
@@ -268,6 +271,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: dict[str, Any] | None = None,
@@ -291,6 +295,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: dict[str, Any] | None = None,
@@ -314,6 +319,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: dict[str, Any] | None = None,
@@ -377,6 +383,8 @@ async def dispatch_request(
             body["secretVariables"] = secret_variables
         if input_variables is not None:
             body["inputVariables"] = input_variables
+        if critic_context is not None:
+            body["criticContext"] = critic_context
         if callback_url is not None:
             body["callbackUrl"] = callback_url
         if callback_secret is not None:
@@ -551,6 +559,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse[dict[str, Any]]: ...
 
@@ -567,6 +576,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse[_StructuredOutput]: ...
 
@@ -583,6 +593,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: dict[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse:
         """Invokes an agent in the Narada extension side panel chat."""
@@ -639,6 +650,18 @@ async def agent(
             else None
         )
 
+        critic_result: CriticResult | None = None
+        if critic is not None:
+            critic_result = await run_critic(
+                dispatch_request=self.dispatch_request,
+                original_prompt=prompt,
+                response_content=response_content,
+                action_trace_raw=action_trace_raw,
+                critic=critic,
+                time_zone=time_zone,
+                timeout=timeout,
+            )
+
         return AgentResponse(
             request_id=remote_dispatch_response["requestId"],
             status=remote_dispatch_response["status"],
@@ -647,6 +670,7 @@ async def agent(
             structured_output=response_content.get("structuredOutput"),
             usage=AgentUsage.model_validate(remote_dispatch_response["usage"]),
             action_trace=action_trace,
+            critic_result=critic_result,
         )
 
     async def agentic_selector(
diff --git a/packages/narada/src/narada/__init__.py b/packages/narada/src/narada/__init__.py
index 1434183..756eccf 100644
--- a/packages/narada/src/narada/__init__.py
+++ b/packages/narada/src/narada/__init__.py
@@ -7,7 +7,15 @@
     NaradaUnsupportedBrowserError,
     UserAbortedError,
 )
-from narada_core.models import Agent, File, ReasoningEffort, Response, ResponseContent
+from narada_core.actions.models import CriticResult
+from narada_core.models import (
+    Agent,
+    CriticConfig,
+    File,
+    ReasoningEffort,
+    Response,
+    ResponseContent,
+)
 
 from narada.client import Narada
 from narada.config import BrowserConfig, ProxyConfig
@@ -20,6 +28,8 @@
     "Agent",
     "BrowserConfig",
     "CloudBrowserWindow",
+    "CriticConfig",
+    "CriticResult",
     "download_file",
     "File",
     "LocalBrowserWindow",
diff --git a/packages/narada/src/narada/window.py b/packages/narada/src/narada/window.py
index dff0332..d3c07fa 100644
--- a/packages/narada/src/narada/window.py
+++ b/packages/narada/src/narada/window.py
@@ -21,6 +21,7 @@
 )
 
 import aiohttp
+from narada_core.actions.critic import run_critic
 from narada_core.actions.models import (
     AgenticMouseAction,
     AgenticMouseActionRequest,
@@ -31,6 +32,7 @@
     AgentResponse,
     AgentUsage,
     CloseWindowRequest,
+    CriticResult,
     ExtensionActionRequest,
     ExtensionActionResponse,
     GetFullHtmlRequest,
@@ -64,6 +66,7 @@
 )
 from narada_core.models import (
     Agent,
+    CriticConfig,
     File,
     McpServer,
     ReasoningEffort,
@@ -308,6 +311,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: Mapping[str, Any] | None = None,
@@ -332,6 +336,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: Mapping[str, Any] | None = None,
@@ -356,6 +361,7 @@ async def dispatch_request(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic_context: dict[str, Any] | None = None,
         callback_url: str | None = None,
         callback_secret: str | None = None,
         callback_headers: Mapping[str, Any] | None = None,
@@ -412,6 +418,8 @@ async def dispatch_request(
             body["inputVariables"] = await self._normalize_input_variables(
                 input_variables=input_variables
             )
+        if critic_context is not None:
+            body["criticContext"] = critic_context
         if callback_url is not None:
             body["callbackUrl"] = callback_url
         if callback_secret is not None:
@@ -522,6 +530,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse[dict[str, Any]]: ...
 
@@ -539,6 +548,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse[_StructuredOutput]: ...
 
@@ -556,6 +566,7 @@ async def agent(
         mcp_servers: list[McpServer] | None = None,
         secret_variables: dict[str, str] | None = None,
         input_variables: Mapping[str, Any] | None = None,
+        critic: CriticConfig | None = None,
         timeout: int = 1000,
     ) -> AgentResponse:
         """Invokes an agent in the Narada extension side panel chat."""
@@ -614,6 +625,18 @@ async def agent(
             else None
         )
 
+        critic_result: CriticResult | None = None
+        if critic is not None:
+            critic_result = await run_critic(
+                dispatch_request=self.dispatch_request,
+                original_prompt=prompt,
+                response_content=response_content,
+                action_trace_raw=action_trace_raw,
+                critic=critic,
+                time_zone=time_zone,
+                timeout=timeout,
+            )
+
         return AgentResponse(
             request_id=remote_dispatch_response["requestId"],
             status=remote_dispatch_response["status"],
@@ -622,6 +645,7 @@ async def agent(
             structured_output=response_content.get("structuredOutput"),
             usage=AgentUsage.model_validate(remote_dispatch_response["usage"]),
             action_trace=action_trace,
+            critic_result=critic_result,
         )
 
     async def agentic_selector(