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Dev.to

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04:30
2026-09-20
dev.to
ai-agents

A coding agent needs a harness, not a longer prompt

A developer published a seven-build "Harness Engineering" roadmap arguing that reliable coding agents depend less on prompt quality and more on the environment around the model. The roadmap covers sco…

04:09
2026-09-20
dev.to
ai-agents

A decision you didn't write down isn't a decision

In the third essay of his AI Harness Engineering series, developer Derek Wang argues that architectural decisions made only in chat with AI coding agents do not persist, since they evaporate when the …

03:43
2026-09-20
dev.to
large-language-models

Claude Sonnet 4.5 vs GPT-5: Claude Wins Coding

A head-to-head comparison finds Anthropic's Claude Sonnet 4.5 outperforms OpenAI's GPT-5 on coding and agentic benchmarks, scoring 77.2% on SWE-bench Verified versus GPT-5's 74.9%, and 50.0% versus 43…

03:15
2026-09-20
dev.to
ai-tools

The Architecture of Averages

A developer argues that AI coding assistants default to conventional architectures when prompts omit key constraints, a failure mode they call "regression to the architectural mean." The engineer illu…

02:12
2026-09-20
dev.to
ai-tools

Hot-Swap a 3D Avatar Without Publishing the Broken Frame

A developer has published a tutorial for building a two-phase, transactional avatar loader that keeps the currently committed 3D avatar visible until a newly generated candidate passes policy validati…

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