Four open-source coding harnesses compared: tool counts range from 9 to 63

yb2698 · x · 2026-10-14

For the experiments, the author chose four open-source harnesses — opencode, Pi, Qwen-Code, and OpenHands — whose built-in tool counts vary widely: Qwen-Code 63, OpenHands 21, opencode 17, Pi just 9. On top of these, they ask: can they also compare against an extremely minimalist harness designed from scratch?

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