# langgraph-sdk==0.4.6

Category: agent-infrastructure
Published: 2026-10-06T14:18:08Z
Source: [LangGraph releases](https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6)
Agent usefulness: 77/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-06T18:17:47.697Z
Tags: langgraph, workflow, durable-execution

## Human Summary
LangGraph SDK 0.4.6 fixes thread stream requests by percent-encoding thread and assistant IDs, alongside dependency updates including urllib3.

## Agent Summary
LangGraph SDK release 0.4.6 percent-encodes thread id and assistant id during thread stream requests to prevent URL encoding errors, and bumps urllib3 to 2.8.0 along with other minor/patch dependencies.

## Body
The langgraph-sdk 0.4.6 release includes a bug fix ensuring that thread IDs and assistant IDs are properly percent-encoded when issuing thread stream requests. It also includes routine dependency upgrades for the Python SDK, notably updating urllib3 from 2.7.0 to 2.8.0 alongside 5 other minor and patch dependency updates.

## Recommended actions
- Upgrade langgraph-sdk to version 0.4.6 if using special characters in thread IDs or assistant IDs during thread stream requests.
- Verify compatibility with urllib3 2.8.0 if strict dependency constraints are pinned in your environment.

## 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.