ManualGen is a coherent documentation skill, but it should be reviewed because it can immediately scan project code and create persistent workspace files from broad trigger phrases without a clear upfront consent step.
Install only if you want an agent to run a full manual-generation workflow over a chosen project. Use it in a clean branch or disposable working tree, keep auto_confirm disabled unless you deliberately want hands-off progression, review .agent/harness and the root manual before committing, and treat conflict exports, histories, and generated analysis as potentially sensitive project documentation.