diff --git a/pyproject.toml b/pyproject.toml
index 8d2eebf6f..1e4a6db63 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.15.3"
+version = "0.15.4"
 description = "Python SDK that enables developers to build and deploy LangGraph agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"
@@ -9,7 +9,7 @@ dependencies = [
     "uipath-core>=0.5.29, <0.6.0",
     "uipath-platform>=0.2.15, <0.3.0",
     "uipath-runtime>=0.12.5, <0.13.0",
-    "uipath-llm-client>=1.17.1, <1.18.0",
+    "uipath-llm-client>=1.18.0, <1.19.0",
     "langgraph>=1.1.8, <2.0.0",
     "langchain-core>=1.2.27, <2.0.0",
     "langgraph-checkpoint-sqlite>=3.0.3, <4.0.0",
@@ -26,7 +26,7 @@ dependencies = [
     "pillow>=12.1.1",
     "rdflib>=7.0.0, <8.0.0",
     "a2a-sdk>=0.2.0,<1.0.0",
-    "uipath-langchain-client[openai]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[openai]>=1.18.0, <1.19.0",
 ]
 
 classifiers = [
@@ -43,21 +43,21 @@ maintainers = [
 
 [project.optional-dependencies]
 anthropic = [
-    "uipath-langchain-client[anthropic]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[anthropic]>=1.18.0, <1.19.0",
 ]
 vertex = [
-    "uipath-langchain-client[google]>=1.17.1,<1.18.0",
-    "uipath-langchain-client[vertexai]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[google]>=1.18.0, <1.19.0",
+    "uipath-langchain-client[vertexai]>=1.18.0, <1.19.0",
 ]
 bedrock = [
-    "uipath-langchain-client[bedrock]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[bedrock]>=1.18.0, <1.19.0",
     "boto3-stubs>=1.41.4",
 ]
 fireworks = [
-    "uipath-langchain-client[fireworks]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[fireworks]>=1.18.0, <1.19.0",
 ]
 all = [
-    "uipath-langchain-client[all]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[all]>=1.18.0, <1.19.0",
 ]
 
 [project.entry-points."uipath.middlewares"]
diff --git a/tests/chat/test_agenthub_config_default.py b/tests/chat/test_agenthub_config_default.py
index 9666736bf..2b3328151 100644
--- a/tests/chat/test_agenthub_config_default.py
+++ b/tests/chat/test_agenthub_config_default.py
@@ -1,9 +1,14 @@
 """Tests that direct construction of UiPathChat / UiPathChatOpenAI /
 UiPathAzureChatOpenAI / UiPathChatBedrock / UiPathChatBedrockConverse /
 UiPathChatAnthropicBedrock / UiPathChatGoogleGenerativeAI / UiPathChatVertex
-defaults ``client_settings.agenthub_config`` to None and omits the
-``x-uipath-agenthub-config`` header on the outgoing httpx client unless
-``UIPATH_AGENTHUB_CONFIG`` is set."""
+defaults ``client_settings.agenthub_config`` based on the execution context.
+
+Since ``uipath-llm-client`` 1.18.0, a design-time run (local, Studio Web, or a
+debug session) defaults ``agenthub_config`` to ``codedagentsplayground`` so coded
+agents draw the CodedAgents.Playground licensing pool, while a deployed run (a real
+Orchestrator job that is not a Studio Web project and not rooted to a debug session)
+keeps it ``None`` and omits the ``x-uipath-agenthub-config`` header. An explicit
+``UIPATH_AGENTHUB_CONFIG`` always wins."""
 
 import pytest
 
@@ -24,6 +29,8 @@
     "signature"
 )
 
+_CODED_PLAYGROUND = "codedagentsplayground"
+
 
 @pytest.fixture(autouse=True)
 def _platform_env(monkeypatch):
@@ -33,6 +40,9 @@ def _platform_env(monkeypatch):
     monkeypatch.setenv("UIPATH_ORGANIZATION_ID", "org")
     monkeypatch.delenv("UIPATH_AGENTHUB_CONFIG", raising=False)
     monkeypatch.delenv("UIPATH_MODEL_NAME", raising=False)
+    # No job key by default -> design-time context.
+    monkeypatch.delenv("UIPATH_JOB_KEY", raising=False)
+    monkeypatch.delenv("UIPATH_PROJECT_ID", raising=False)
 
 
 _DIRECT_CTOR_CASES = [
@@ -49,7 +59,14 @@ def _platform_env(monkeypatch):
 
 @pytest.mark.parametrize("cls", _DIRECT_CTOR_CASES)
 class TestDirectConstructorAgentHubConfig:
-    def test_default_is_none(self, cls):
+    def test_default_is_coded_playground_at_design_time(self, cls):
+        """No job key -> design-time -> codedagentsplayground."""
+        llm = cls()
+        assert llm.client_settings.agenthub_config == _CODED_PLAYGROUND
+
+    def test_default_is_none_when_deployed(self, cls, monkeypatch):
+        """Deployed job (not a studio project, not a debug session) -> None."""
+        monkeypatch.setenv("UIPATH_JOB_KEY", "deployed-job")
         llm = cls()
         assert llm.client_settings.agenthub_config is None
 
@@ -58,7 +75,20 @@ def test_env_var_is_honored(self, cls, monkeypatch):
         llm = cls()
         assert llm.client_settings.agenthub_config == "agentsplayground"
 
-    def test_no_agenthub_header_on_inner_http_client(self, cls):
+    def test_coded_playground_header_on_inner_http_client_at_design_time(self, cls):
+        """Design-time run emits the coded-playground header on the httpx client."""
+        llm = cls()
+        client = getattr(llm, "uipath_sync_client", None)
+        if client is None:
+            pytest.skip(f"{cls.__name__} has no uipath_sync_client to inspect")
+        normalized = {key.lower(): value for key, value in client.headers.items()}
+        assert normalized.get("x-uipath-agenthub-config") == _CODED_PLAYGROUND
+
+    def test_no_agenthub_header_on_inner_http_client_when_deployed(
+        self, cls, monkeypatch
+    ):
+        """Deployed run omits the agenthub-config header."""
+        monkeypatch.setenv("UIPATH_JOB_KEY", "deployed-job")
         llm = cls()
         client = getattr(llm, "uipath_sync_client", None)
         if client is None: