openJiuwen: Beyond Static Harnesses for Long-Horizon Coding Agents

Huawei's open-source agent harness for long-horizon coding, organized around two claims about where static harnesses break: structural composability (developers should compose capabilities, delegated agents and multi-agent coordination without rebuilding orchestration) and runtime adaptivity (fresh evidence — semantic diagnostics, execution outcomes, task progress, shifting context relevance — should steer subsequent runtime decisions rather than being discarded).

The jiuwenswarm repo (Apache 2.0) predates the paper by months and stands at ~6.7K stars, making this one of the larger open harness codebases from a Chinese lab. Complements Huawei's earlier HarnessX work and the broader execution-layer line the index tracks.