Superpowers v6.3.0 Made Agent Skills Portable to Devin CLI, Hermes Agent and Grok Build CLI

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obra/superpowers (272,001 stars) shipped v6.3.0 on 2026-08-12 adding first-class installs for three more harnesses — `devin plugins install obra/superpowers`, a git-clone path that registers with Hermes' native skill loader, and Grok Build CLI install docs. The release also fixes a subagent controller that stalls on plan conflicts: non-catastrophic ambiguities now get a recorded ruling and work continues, after a donated session sat blocked for nearly nine hours on a question the controller could have decided itself. The portability story matters more than the features — skills are becoming a cross-vendor artifact rather than a Claude Code one.