# Harness Python v1.18.0

Released 2025-11-21
Release: https://github.com/strands-agents/harness-sdk/releases/tag/python/v1.18.0 · Package: https://pypi.org/project/strands-agents/1.18.0/

## Fixes
- fix swarm session management integ test. [multiagent] (https://github.com/strands-agents/sdk-python/pull/1155)
- protect connection on non-fatal client side timeout error [mcp] (https://github.com/strands-agents/sdk-python/pull/1231)
- populate cacheWriteInputTokens from cache\_creation\_input\_token not cache\_creation\_tokens [model] (https://github.com/strands-agents/sdk-python/pull/1233)
- fix integ test for mcp elicitation\_server [mcp] (https://github.com/strands-agents/sdk-python/pull/1234)

## Other
- multi agent input [agent] (https://github.com/strands-agents/sdk-python/pull/1196)
- interrupt - activate - set context separately [context] (https://github.com/strands-agents/sdk-python/pull/1194)
- In PrintingCallbackHandler, make the verbose description and counting… (https://github.com/strands-agents/sdk-python/pull/1211)
- move tool caller definition out of agent module [tool] (https://github.com/strands-agents/sdk-python/pull/1215)
- interrupt - interruptible multi agent hook interface [hooks] (https://github.com/strands-agents/sdk-python/pull/1207)
- security(tool\_loader): prevent tool name and sys modules collisions i… [tool] (https://github.com/strands-agents/sdk-python/pull/1214)

## First-time contributors
- @marcbrooker (#1211)