diff --git a/nanobot/optional_features.py b/nanobot/optional_features.py
index b1965a34..c9aa700d 100644
--- a/nanobot/optional_features.py
+++ b/nanobot/optional_features.py
@@ -48,7 +48,7 @@ class InstallResult:
 
 _INSTALL_TIMEOUT_SECONDS = 300
 _LOG_OUTPUT_LIMIT = 4000
-_HIDDEN_OPTIONAL_FEATURES = {"documents", "langsmith", "pdf"}
+_HIDDEN_OPTIONAL_FEATURES = {"documents", "pdf"}
 _BUNDLED_FEATURE_ALIASES = {"documents", "pdf"}
 
 
@@ -534,10 +534,6 @@ def enable_optional_feature(
     )
     from nanobot.config.loader import get_config_path
 
-    # The old extra never powered a runtime integration. Keep the CLI spelling
-    # as a compatibility alias while directing users to the supported tracer.
-    if name == "langsmith":
-        name = "langfuse"
     if name in _BUNDLED_FEATURE_ALIASES:
         payload = optional_features_payload(
             last_action={
diff --git a/pyproject.toml b/pyproject.toml
index 88e7a046..80864e57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -127,9 +127,6 @@ whatsapp = [
     "neonize>=0.3.18.post0,<0.4.0",
     "segno>=1.6.1,<2.0.0",
 ]
-langsmith = [
-    "langsmith>=0.1.0",
-]
 langfuse = [
     "langfuse>=3.0.0,<4.0.0",
 ]
diff --git a/tests/channels/test_feishu_reaction.py b/tests/channels/test_feishu_reaction.py
index 6d21c0a3..7721b4fe 100644
--- a/tests/channels/test_feishu_reaction.py
+++ b/tests/channels/test_feishu_reaction.py
@@ -4,6 +4,8 @@ from unittest.mock import AsyncMock, MagicMock
 
 import pytest
 
+pytest.importorskip("lark_oapi")
+
 from nanobot.bus.queue import MessageBus
 from nanobot.channels.feishu import FeishuChannel, FeishuConfig, _FeishuStreamBuf
 
diff --git a/tests/channels/test_feishu_streaming.py b/tests/channels/test_feishu_streaming.py
index da3537b0..d683cfaa 100644
--- a/tests/channels/test_feishu_streaming.py
+++ b/tests/channels/test_feishu_streaming.py
@@ -5,6 +5,8 @@ from unittest.mock import MagicMock
 
 import pytest
 
+pytest.importorskip("lark_oapi")
+
 from nanobot.bus.events import OutboundMessage
 from nanobot.bus.outbound_events import ProgressEvent
 from nanobot.bus.queue import MessageBus