Addy Osmani is the author of the X Article "Agent Harness Engineering," which argues that the practical performance of coding agents depends heavily on the harness around the model: prompts, tools, context, hooks, sandboxes, subagents, memory, and feedback loops.source: addy-osmani-agent-harness-engineering-2026.md
The article connects public discussion by Varun Trivedy, HumanLayer, Anthropic engineering, Birgitta Böckeler, Fareed Khan, and Fred K. Schott into a broader framing: the industry is converging on harness patterns that can make a decent model with a strong harness outperform a stronger model with weak scaffolding.source: addy-osmani-agent-harness-engineering-2026.md
Osmani also wrote "Cognitive Surrender," distinguishing productive cognitive offloading from the risk that AI output becomes accepted as the engineer's own view without independent understanding. That article connects AI coding practice to cognitive-surrender, comprehension debt, and review/verification habits that keep agents in a mutual-amplification role.source: addy-osmani-cognitive-surrender-2026.md
Related pages: harness-engineering, hermes-agent, self-improving-knowledge-base, cognitive-surrender, ai-assisted-software-development.