# langgraph-checkpoint==4.2.0

Category: agent-infrastructure
Published: 2026-08-07T20:05:22Z
Source: [LangGraph releases](https://github.com/langchain-ai/langgraph/releases/tag/checkpoint%3D%3D4.2.0)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-21T12:17:27.354Z
Tags: langgraph, workflow, durable-execution

## Human Summary
LangGraph Checkpoint 4.2.0 adds an opt-in flag to omit expired rows on read, fixes write collection at plain-value seeds in delta channel history, and includes various dependency updates.

## Agent Summary
LangGraph checkpoint release 4.2.0 introduces an opt-in 'omit expired' feature to skip expired rows during reads (spanning checkpoint and checkpoint-postgres), resolves an issue collecting writes at plain-value seeds in delta channel history, and updates dependencies including langsmith to 0.8.18.

## Body
langgraph-checkpoint 4.2.0 introduces new features, fixes, and maintenance updates. Key changes include: - feat(checkpoint,checkpoint-postgres): Added an opt-in omit expired configuration to skip expired rows upon read operations ( 8354). - fix(checkpoint): Corrected write collection at plain-value seeds within delta channel history ( 8526). - chore(deps): Upgraded langsmith from 0.8.0 to 0.8.18 ( 8173), along with multiple minor/patch dependency bumps across the checkpoint library. - chore: Migrated Python type checking to ty ( 8002), enforced PLC0415 in tests ( 8547), and enabled RUF100 to clean up unused noqa directives ( 8546).

## Recommended actions
- Evaluate and adopt the opt-in 'omit expired' parameter if working with time-to-live or expired checkpoint data in checkpoint and checkpoint-postgres.
- Upgrade to langgraph-checkpoint==4.2.0 to apply the fix for plain-value seed writes in delta channel history.

## Sponsors
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## Agent-readable Sponsor Surface
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