What does this release signal mean?

Anthropic published anthropics/anthropic-sdk-csharp Anthropic-v12.39.0 (anthropics/anthropic-sdk-csharp). This release signal is evidence of what shipped, changed, or was packaged for users. High-signal details: Anthropic: v12.39.0 Repository: anthropics/anthropic-sdk-csharp Tag: Anthropic-v12.39.0 Published: 2026-07-24T16:37:08Z Prerelease: no Release notes: 12.39.0.... onlylabs links this event to 1 captured evidence page and 6 related release signals.

Anthropic Release: anthropics/anthropic-sdk-csharp Anthropic-v12.39.0

Captured source

source ↗

GitHub/github.com/anthropics/anthropic-sdk-csharp

anthropics/anthropic-sdk-csharp Anthropic-v12.39.0

Source ↗

published Jul 24, 2026seen 1dcaptured 1dhttp 200method plain

Anthropic: v12.39.0

Repository: anthropics/anthropic-sdk-csharp

Tag: Anthropic-v12.39.0

Published: 2026-07-24T16:37:08Z

Prerelease: no

Release notes:

12.39.0 (2026-07-24)

Full Changelog: Anthropic-v12.38.0...Anthropic-v12.39.0

Features

api: add claude-opus-5 model (bbee155)
api: add tool addition/removal blocks and tool_change events (bbee155)
api: expand client-side fallback credit token types and add server-side fallbacks default option (bbee155)

Bug Fixes

client: streaming parallel tool-use emit logic (issue #197) (#200) (c1373ac)