From f55e77274dad40897ef7b2d52cc7c0b85b792247 Mon Sep 17 00:00:00 2001
From: Elior Nataf Lackritz <elior.nataflackritz@langchain.dev>
Date: Fri, 7 Aug 2026 15:59:52 -0400
Subject: [PATCH] release(checkpoint): 4.2.0 (#8563)

Version bump only. No library code changes in this PR.

Unreleased since `checkpoint==4.1.1`:

- #8526 - collect writes at plain-value seed in delta channel history
- #8354 - add opt-in `TTLConfig.omit_expired` to skip expired rows on
read

Minor rather than patch because #8354 adds a new public `TTLConfig` key.
Note that the checkpoint-postgres half of #8354 already shipped in
`checkpointpostgres==3.1.1`, so the currently released Postgres saver
honors an option that no released `langgraph-checkpoint` declares. This
closes that gap.

`langgraph-checkpoint-postgres` 3.1.2 (#8535) follows once this is live
on PyPI.
---
 libs/checkpoint-conformance/uv.lock | 2 +-
 libs/checkpoint-postgres/uv.lock    | 2 +-
 libs/checkpoint-sqlite/uv.lock      | 2 +-
 libs/checkpoint/pyproject.toml      | 2 +-
 libs/checkpoint/uv.lock             | 2 +-
 libs/langgraph/uv.lock              | 2 +-
 libs/prebuilt/uv.lock               | 2 +-
 libs/sdk-py/uv.lock                 | 2 +-
 8 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/libs/checkpoint-conformance/uv.lock b/libs/checkpoint-conformance/uv.lock
index 599dc9032..5ac5ad8e3 100644
--- a/libs/checkpoint-conformance/uv.lock
+++ b/libs/checkpoint-conformance/uv.lock
@@ -279,7 +279,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/checkpoint-postgres/uv.lock b/libs/checkpoint-postgres/uv.lock
index 88d051243..9b349f08b 100644
--- a/libs/checkpoint-postgres/uv.lock
+++ b/libs/checkpoint-postgres/uv.lock
@@ -276,7 +276,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/checkpoint-sqlite/uv.lock b/libs/checkpoint-sqlite/uv.lock
index 5db200b4f..b6a8e9616 100644
--- a/libs/checkpoint-sqlite/uv.lock
+++ b/libs/checkpoint-sqlite/uv.lock
@@ -285,7 +285,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/checkpoint/pyproject.toml b/libs/checkpoint/pyproject.toml
index 6a22a8ccc..d98630b4c 100644
--- a/libs/checkpoint/pyproject.toml
+++ b/libs/checkpoint/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 description = "Library with base interfaces for LangGraph checkpoint savers."
 authors = []
 requires-python = ">=3.10"
diff --git a/libs/checkpoint/uv.lock b/libs/checkpoint/uv.lock
index bc8ac7324..054ce0a4b 100644
--- a/libs/checkpoint/uv.lock
+++ b/libs/checkpoint/uv.lock
@@ -300,7 +300,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "." }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/langgraph/uv.lock b/libs/langgraph/uv.lock
index 6a3fa4727..02306faa6 100644
--- a/libs/langgraph/uv.lock
+++ b/libs/langgraph/uv.lock
@@ -1622,7 +1622,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/prebuilt/uv.lock b/libs/prebuilt/uv.lock
index 6bb7777c0..7133e123f 100644
--- a/libs/prebuilt/uv.lock
+++ b/libs/prebuilt/uv.lock
@@ -369,7 +369,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },
diff --git a/libs/sdk-py/uv.lock b/libs/sdk-py/uv.lock
index 215467427..f66349f4e 100644
--- a/libs/sdk-py/uv.lock
+++ b/libs/sdk-py/uv.lock
@@ -382,7 +382,7 @@ test = [
 
 [[package]]
 name = "langgraph-checkpoint"
-version = "4.1.1"
+version = "4.2.0"
 source = { editable = "../checkpoint" }
 dependencies = [
     { name = "langchain-core" },