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#8e423ce2
Topic
MODELS & API
Source
Anthropic Python SDK
Published
2026-05-19 15:43:14
Importance
★ 4/10 — radar 40
`anthropic-sdk-python` `0.103.1` fixes `SessionToolRunner` ownership handling
FIG-0841:1

`anthropic-sdk-python` `0.103.1` fixes `SessionToolRunner` ownership handling

A narrow agent-runtime fix prevents skipping the wrong boundary. Upgrade when your app uses SDK-managed tool sessions; otherwise low urgency.

[ KEY POINTS ]
  1. SessionToolRunner now skips tool calls it does not own, reducing cross-runner handling bugs in agent workflows.
  2. The changelog lists one bug fix only and no API, pricing, or model behavior changes.
  3. Pin-sensitive apps should test 0.103.1; simple messages API usage can wait for the next regular bump.
Originalgithub.com/anthropics/anthropic-sdk-python/releases/tag/v0.103.1Read original →

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