OpenHarmony System Dev

Platform work has its own rules that normal-app development doesn't. A system/persistent bundle (systemui, launcher, a gesture-nav service) is not reloaded by reinstalling it — it reloads on reboot — and it's signed/installed differently. This skill captures that loop. Everything routes through the devecocli CLI where the documented commands support it (cross-platform; stdout=results, stderr=logs) with raw hdc / bm / param as the escape hatch.

Platform builds assume access to an OHOS source tree and a device/emulator that accepts system bundles (a dev image, or system_app signing). Paths like applications/standard/systemui below are illustrative.

Windows toolchain selection

Require the caller's PATH to put the DevEco Studio Node directory first, followed by the npm global bin directory and DevEco toolchain directories. Do not hard-code, probe, or modify installation paths in this skill. Verify the resolved tools: