Anthropic SDKs coordinated v1.2.0 (Python, TS, Go, Java, Ruby, C#) promote Files and Skills APIs to GA shapes, drop beta headers
Anthropic
Coordinated Aug 27, 2026 across Python v1.2.0, TypeScript v0.122.0, Go v1.68.0, Java v2.59.0, Ruby v1.67.0 and C# v12.44.0. client.beta.files and client.beta.skills no longer send the dated files-api-2025-04-14 and skills-2025-10-02 beta headers and return the same shapes as client.files and client.skills; client.beta.skills.delete() now deletes a Skill together with all of its versions; the beta Messages type BetaSkill (container Skill reference) is renamed BetaContainerSkill. Bug fixes: Bedrock binary-file upload signing (#531), sessions event-accumulator forward-compat (#533), tools read view_range over the size cap (#538), exact file-byte preservation in the agent and memory toolsets (#540), webhook unwrap() now requires headers. Same day's Claude Console release adds personal keys and service-account keys (with workspace-scoped and admin-endpoint variants). PHP 0.44.0 was not bumped in this round.
Why it matters
Drops the last pinned beta headers from the Files and Skills surfaces, letting enterprise customers remove conditional code paths and align their SDK code with the same day Anthropic ships personal / service-account keys in the Console — Files and Skills are now first-class across every first-party SDK.
Importance: 4/5
flagship release; official confirmation