Source record

Published by Anthropic Engineering (T1 source). The original is at https://www.anthropic.com/engineering/harness-design-long-running-apps.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

Anthropic Engineering details harness design work for Claude targeting two problems: high-quality frontend design and fully autonomous long-running application development, extending earlier prompt engineering and skill work that plateaued.

Firsthand Anthropic Labs account of harness architecture choices for long-running Claude coding, with lessons on what broke through earlier performance ceilings.

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