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Boris Cherny, who built Claude Code, says engineering, product, design and data science are melting into one role, and what's left is five archetypes: Prototyper, Builder, Sweeper, Grower, Maintainer. I read the list and realised I'm all five, because building solo with agents leaves no one to hand a phase to. The framework is thirty years old. What's new is that it just became the primary axis instead of the secondary one.
READBenchmarks say turn effort up. On real work, it went the other way. I ran Claude Opus 5.5, Claude Sonnet 5.5 and GPT-6 Sol at low, medium, high, xhigh and max effort on six real changes from a production monorepo: 300 runs. Opus peaked at medium, the Claude Code default, and reproduced it exactly on a second day. Above medium it started breaking tests. More effort never made any model more careful.
READClaude Code 2.1.287 shipped mods: plugins that load once, keep state, draw panes and rewrite events inside the session. I built one for ccseats in an afternoon. It shows seat budgets, hands the conversation to another account, and briefs Codex or Grok from Claude's own cached transcript. The surface is large, the validator is strict, and two reviews still found nine bugs.
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