From 4add059df44c877475eae8484fcde23b25cdf9d6 Mon Sep 17 00:00:00 2001
From: tudormatei <tudor.matei@uipath.com>
Date: Fri, 17 Jul 2026 16:13:58 +0300
Subject: [PATCH] fix(chat): raise ModelNotFoundError on legacy discovery-miss

The legacy chat model factory raised a bare ValueError when a model was
not returned by the discovery API, indistinguishable from other
ValueErrors without matching on the error message text.

Raise uipath-llm-client's ModelNotFoundError instead (added in
uipath-llm-client 1.17.1). It subclasses ValueError, so existing
`except ValueError` handlers keep working.

Bumps the uipath-llm-client / uipath-langchain-client floors to >=1.17.1
and the package version to 0.14.11.
---
 pyproject.toml                                 | 18 +++++++++---------
 .../chat/_legacy/chat_model_factory.py         |  4 +++-
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 8297a7d10..b3d4154b3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "uipath-langchain"
-version = "0.14.10"
+version = "0.14.11"
 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>=0.2.10, <0.3.0",
     "uipath-runtime>=0.12.1, <0.13.0",
-    "uipath-llm-client>=1.17.0, <1.18.0",
+    "uipath-llm-client>=1.17.1, <1.18.0",
     "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]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[openai]>=1.17.1,<1.18.0",
 ]
 
 classifiers = [
@@ -43,21 +43,21 @@ maintainers = [
 
 [project.optional-dependencies]
 anthropic = [
-    "uipath-langchain-client[anthropic]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[anthropic]>=1.17.1,<1.18.0",
 ]
 vertex = [
-    "uipath-langchain-client[google]>=1.17.0,<1.18.0",
-    "uipath-langchain-client[vertexai]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[google]>=1.17.1,<1.18.0",
+    "uipath-langchain-client[vertexai]>=1.17.1,<1.18.0",
 ]
 bedrock = [
-    "uipath-langchain-client[bedrock]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[bedrock]>=1.17.1,<1.18.0",
     "boto3-stubs>=1.41.4",
 ]
 fireworks = [
-    "uipath-langchain-client[fireworks]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[fireworks]>=1.17.1,<1.18.0",
 ]
 all = [
-    "uipath-langchain-client[all]>=1.17.0,<1.18.0",
+    "uipath-langchain-client[all]>=1.17.1,<1.18.0",
 ]
 
 [project.entry-points."uipath.middlewares"]
diff --git a/src/uipath_langchain/chat/_legacy/chat_model_factory.py b/src/uipath_langchain/chat/_legacy/chat_model_factory.py
index 940cfcf75..b4afe3664 100644
--- a/src/uipath_langchain/chat/_legacy/chat_model_factory.py
+++ b/src/uipath_langchain/chat/_legacy/chat_model_factory.py
@@ -234,7 +234,9 @@ def _get_model_info(
         matching_models = [m for m in matching_models if m.get("byomDetails") is None]
 
     if not matching_models:
-        raise ValueError(
+        from uipath.llm_client.utils.exceptions import ModelNotFoundError
+
+        raise ModelNotFoundError(
             f"model='{model}' and byo_connection_id={byo_connection_id}"
             + " is not available. It was not returned by the discovery API."
         )