v2.44.0

2.44.0 (2026-06-24)

Full Changelog: v2.43.0...v2.44.0

Features

• client: add support for system.message streaming events (e27e961)

Chores

• api: add support for new refusal category (8c1bd29)
• api: add support for sending User Profile ID in request headers (8d69cbe)

Build System

• enable warnings as errors (#106) (43f1430)
• fix lock file enforcement for IDEs (#107) (48940e3)

v2.43.0

2.43.0 (2026-06-18)

Full Changelog: v2.42.0...v2.43.0

Features

• helpers: introduce x-stainless-helper telemetry + tag the refusal-fallback interceptor (#91) (a14925b)

v2.42.0

2.42.0 (2026-06-18)

Full Changelog: v2.41.1...v2.42.0

Features

• api: add support for new code_execution_20260120 tool (1a1a6b9)

v2.41.1

2.41.1 (2026-06-18)

Full Changelog: v2.41.0...v2.41.1

Chores

• fix release runs-on (#354) (78e23a5)

Build System

• fix signing for publishing (#90) (700f81d)

v2.41.0

2.41.0 (2026-06-17)

Full Changelog: v2.40.1...v2.41.0

Bug Fixes

• client: bad model definitions (96787c6)
• foundry: align baseUrl contract with the other SDKs (/anthropic in baseUrl, no path rewrite) (#84) (e651d93)

Chores

• api: remove retired models from API and SDKs (da1c93d)
• upgrade all deps (#73) (e57f1b5)

Styles

• apply formatting (#88) (9c929f7)

Build System

• enabling dependency locking (#83) (7d87ed6)
• fix runners (#66) (19882bb)
• further cleanups + reorganization (#78) (568600d)
• make JavaExec tasks build-cacheable + speed up scripts (#80) (218bd30)
• migrate to Kotlin 2.0 metadata and Gradle 9 (#65) (32cc293)
• modernize proguard setup (#71) (177b637)
• parallelize jackson test passes + trim shrinker input (#81) (d4209ce)
• restructure gradle configs (#69) (c34733e)
• speed up local and CI builds (#62) (78de617)
• update runners (6481804)
• update runners (#67) (59ff3b9)
• upgrade dokka (#68) (39ae660)
• use config cache for publishing (#70) (4545c27)

v2.40.1

2.40.1 (2026-06-09)

Full Changelog: v2.40.0...v2.40.1

Bug Fixes

• api: add frontier_llm refusal category (1627fd3)

v2.40.0

2.40.0 (2026-06-09)

Full Changelog: v2.39.0...v2.40.0

Features

• api: add support for Managed Agents deployments and environment variable credentials (628720b)

v2.39.0

2.39.0 (2026-06-09)

Full Changelog: v2.38.0...v2.39.0

Features

• api: add support for claude-mythos-5 and claude-fable-5, with support for server-side fallbacks on refusal (835fb42)
• client: adds client-side fallbacks middleware for API providers that do not support server-side fallbacks (835fb42)

Bug Fixes

• 3p middleware ordering (#34) (d01da3a)
• streaming: merge message_delta usage without dropping or rejecting iterations (#39) (e3af118)

v2.38.0

2.38.0 (2026-06-06)

Full Changelog: v2.37.0...v2.38.0

Features

• api: small updates to Managed Agents types (c7b08d8)

v2.37.0

2.37.0 (2026-06-05)

Full Changelog: v2.36.0...v2.37.0

Features

• api: mark Claude Opus 4.1 as deprecated (693cbb4)