chore: prepare for release v0.19.0 (#1519)

Author: github-actions[bot]

CHANGELOG.md

@@ -9,6 +9,31 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 >
 > The changes related to the Colang language and runtime have moved to [CHANGELOG-Colang](./CHANGELOG-Colang.md) file.
 
+## [0.19.0] - 2025-12-03
+
+### 🚀 Features
+
+- Support langchain v1 ([#1472](https://github.com/NVIDIA/NeMo-Guardrails/issues/1472))
+- *(llm)* Add LangChain 1.x content blocks support for reasoning and tool calls ([#1496](https://github.com/NVIDIA/NeMo-Guardrails/issues/1496))
+- *(benchmark)* Add Procfile to run Guardrails and mock LLMs ([#1490](https://github.com/NVIDIA/NeMo-Guardrails/issues/1490))
+- *(benchmark)*: Add AIPerf run script (([#1501](https://github.com/NVIDIA/NeMo-Guardrails/issues/1501)))
+
+### 🐛 Bug Fixes
+
+- *(llm)* Add async streaming support to ChatNVIDIA provider patch ([#1504](https://github.com/NVIDIA/NeMo-Guardrails/issues/1504))
+- ensure stream_async background task completes before exit ([#1508](https://github.com/NVIDIA/NeMo-Guardrails/issues/1508))
+- *(cli)* Fix TypeError in v2.x chat due to incorrect State/dict conversion ([#1509](https://github.com/NVIDIA/NeMo-Guardrails/issues/1509))
+- *(llmrails)*: skip output rails when dialog disabled and no bot_message provided ([#1518](https://github.com/NVIDIA/NeMo-Guardrails/issues/1518))
+- *(llm)*: ensure that stop token is not ignored if llm_params is None ([#1529](https://github.com/NVIDIA/NeMo-Guardrails/issues/1529))
+
+### ⚙️ Miscellaneous Tasks
+
+- *(llm)* Remove deprecated llm_params module ([#1475](https://github.com/NVIDIA/NeMo-Guardrails/issues/1475))
+
+### ◀️ Revert
+
+- *(llm)* Remove custom HTTP headers patch now in langchain-nvidia-ai-endpoints v0.3.19 ([#1503](https://github.com/NVIDIA/NeMo-Guardrails/issues/1503))
+
 ## [0.18.0] - 2025-11-06
 
 ### 🚀 Features

README.md

@@ -7,7 +7,7 @@
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![arXiv](https://img.shields.io/badge/arXiv-2310.10501-b31b1b.svg)](https://arxiv.org/abs/2310.10501)
 
-> **LATEST RELEASE / DEVELOPMENT VERSION**: The [main](https://github.com/NVIDIA/NeMo-Guardrails/tree/main) branch tracks the latest released beta version: [0.18.0](https://github.com/NVIDIA/NeMo-Guardrails/tree/v0.18.0). For the latest development version, checkout the [develop](https://github.com/NVIDIA/NeMo-Guardrails/tree/develop) branch.
+> **LATEST RELEASE / DEVELOPMENT VERSION**: The [main](https://github.com/NVIDIA/NeMo-Guardrails/tree/main) branch tracks the latest released beta version: [0.19.0](https://github.com/NVIDIA/NeMo-Guardrails/tree/v0.19.0). For the latest development version, checkout the [develop](https://github.com/NVIDIA/NeMo-Guardrails/tree/develop) branch.
 
 ✨✨✨
 

pyproject.toml

@@ -4,7 +4,7 @@ description = "NeMo Guardrails is an open-source toolkit for easily adding progr
 authors = ["NVIDIA <nemoguardrails@nvidia.com>"]
 license = "LICENSE.md"
 readme = "README.md"
-version = "0.18.0"
+version = "0.19.0"
 packages = [{ include = "nemoguardrails" }]