Developer builds open-source 'manager' pattern for AI coding agents, cutting costs 35-41%
A solo developer implemented a pattern from Cognition (the Devin team) where an expensive frontier model acts as a 'manager' that plans and reviews code changes but cannot edit files directly, delegating all mechanical work to a cheaper, faster model. The approach, published as open source for the opencode terminal coding agent, reportedly reduces costs by 35-41% while maintaining quality.
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Article argues expert intuition, not prompts, determines AI coding tool success
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Developer open-sources Istar Code v5.0.0 deterministic coding agent kernel
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