Source record

Published by martinfowler.com (Exploring Gen AI series, incl. Böckeler) (T1 source). The original is at https://martinfowler.com/articles/harness-engineering.html.

Pipeline notes

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

Böckeler proposes a mental model for building trust in coding agents by defining the harness as everything in an agent except the model. She introduces feedforward guides and feedback sensors as components of an outer, user-built harness tailored to specific coding workflows and contexts.

Gives a clean Agent = Model + Harness decomposition and vocabulary (feedforward, feedback sensors) that lets teams reason about their coding agent setup systematically instead of as a black box.

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