# langgraph==1.2.20

Category: agent-infrastructure
Published: 2026-11-05T02:20:53Z
Source: [LangGraph releases](https://github.com/langchain-ai/langgraph/releases/tag/1.2.20)
Agent usefulness: 72/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-11-05T06:17:49.836Z
Tags: langgraph, workflow, durable-execution

## Human Summary
LangGraph 1.2.20 introduces unique IDs for task interrupts, a strict resume mode to reject stale interrupt responses, and doc link fixes.

## Agent Summary
LangGraph version 1.2.20 adds unique IDs per task interrupt, introduces a strict resume mode rejecting stale answers, updates multiple-interrupt error documentation links, and updates dev dependencies.

## Body
LangGraph released version 1.2.20 with updates targeting interrupt handling. Key changes include assigning a unique ID to each interrupt() within a task, introducing a strict resume mode that rejects stale interrupt answers, and updating the multiple-interrupts error message to direct to current documentation. The release also includes development dependency bumps for types-requests and pycryptodome.

## Recommended actions
- Upgrade langgraph to version 1.2.20 via your package manager.
- Evaluate whether to enable the new strict resume mode to prevent stale interrupt answers in your agent workflows.

## 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.