From 9221ddbc49f720adbafcdd0ce6189693dca3d8c1 Mon Sep 17 00:00:00 2001
From: Sarah Clark <seclark@nextquestion.net>
Date: Mon, 27 Apr 2026 10:36:05 -0700
Subject: [PATCH] python3Packages.langchain-protocol: init at 0.0.12

---
 .../python-modules/langchain-core/default.nix |  4 +-
 .../langchain-protocol/default.nix            | 39 +++++++++++++++++++
 pkgs/top-level/python-packages.nix            |  2 +
 3 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 pkgs/development/python-modules/langchain-protocol/default.nix

diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index ea0c885d06cb..5e7f6be35c22 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -36,14 +36,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-core";
-  version = "1.2.27";
+  version = "1.3.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-core==${finalAttrs.version}";
-    hash = "sha256-WdC43SUVgteNQLNMD+yEkD8TyyCFGXkYTi5moZMEmVo=";
+    hash = "sha256-7ugQnVnq/yW/7NVtqkAB1C3+XjLN3m+GQFKtv5uXw9E=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/core";
diff --git a/pkgs/development/python-modules/langchain-protocol/default.nix b/pkgs/development/python-modules/langchain-protocol/default.nix
new file mode 100644
index 000000000000..491e71f7956b
--- /dev/null
+++ b/pkgs/development/python-modules/langchain-protocol/default.nix
@@ -0,0 +1,39 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+  hatchling,
+  typing-extensions,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "langchain-protocol";
+  version = "0.0.12";
+  pyproject = true;
+
+  # Not available vis Github yet; required by langchain-core
+  src = fetchPypi {
+    pname = "langchain_protocol";
+    inherit (finalAttrs) version;
+    hash = "sha256-XhTENCkKcFyVEP2xqD7PdWGl5uDf0FOTCt6A26BpJp8=";
+  };
+
+  build-system = [
+    hatchling
+  ];
+
+  dependencies = [
+    typing-extensions
+  ];
+
+  pythonImportsCheck = [
+    "langchain_protocol"
+  ];
+
+  meta = {
+    description = "Python bindings for the LangChain agent streaming protocol";
+    homepage = "https://pypi.org/project/langchain-protocol";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ sarahec ];
+  };
+})
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 3ffee3531420..f96d0a7ae8a7 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8478,6 +8478,8 @@ self: super: with self; {
 
   langchain-perplexity = callPackage ../development/python-modules/langchain-perplexity { };
 
+  langchain-protocol = callPackage ../development/python-modules/langchain-protocol { };
+
   langchain-tests = callPackage ../development/python-modules/langchain-tests { };
 
   langchain-text-splitters = callPackage ../development/python-modules/langchain-text-splitters { };