Why build a minimal agent harness when Claude Code exists? The knowledge transfers

omarsar0 · x · 2026-09-05

Elvis (@omarsar0) is publishing a series on building your own minimal agent harness. Responding to "why bother when Claude Code and Codex exist," he argues that building even a small one changes how you use the big ones: you learn what breaks, what the model needs after a failure, and which knobs matter — knowledge that transfers to every harness you touch.

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