# langgraph-checkpoint-postgres==3.1.2

Category: agent-infrastructure
Published: 2026-08-07T20:40:16Z
Source: [LangGraph releases](https://github.com/langchain-ai/langgraph/releases/tag/checkpointpostgres%3D%3D3.1.2)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-21T12:17:26.875Z
Tags: langgraph, workflow, durable-execution

## Human Summary
LangGraph's Postgres checkpointer library has been updated to version 3.1.2, addressing an issue with finding plain-value seeds during delta history traversal.

## Agent Summary
langgraph-checkpoint-postgres release 3.1.2 fixes plain-value seed discovery when walking delta history, incorporates checkpoint conformance suite testing, updates linting configurations, and bumps dependency versions.

## Body
LangGraph released langgraph-checkpoint-postgres 3.1.2 with several maintenance and fix updates since 3.1.1. Key changes include: a bug fix resolving how plain-value seeds are found when walking delta history ( 8535); execution of the standard conformance test suite across checkpoint-postgres and checkpoint-sqlite ( 8537); linting enhancements including enabling RUF100, PLC0415, and clearing unused noqa directives ( 8546, 8540); and automated dependency version bumps in the minor-and-patch group ( 8497).

## Recommended actions
- Upgrade langgraph-checkpoint-postgres to 3.1.2 if relying on delta history traversal with plain-value seeds.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.