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Checked fact 123412 Oct 2026Agents and apps

Anthropic's engineering post of 26 November 2025 calls the Claude Agent SDK "a powerful, general-purpose agent harness adept at coding".

The exact words it rests on

Published Nov 26, 2025 ... The Claude Agent SDK is a powerful, general-purpose agent harness adept at coding, as well as other tasks that require the model to use tools to gather context, plan, and execute.

What the source said when we opened it, on 12 Oct 2026.

The source

Effective harnesses for long-running agents
Anthropic Engineering · 2025-11-26

Checked

Checked by the notis newsroom on , against the source above.

In the story

How an agent harness runs a model and enforces limits 12 Oct 2026

Cite this fact

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