I built skill-mgr to solve the mess of managing agent skills. Here are the highlights: * Cross-Agent Sync: Atomically install or update a skill across multiple heterogeneous agents (Claude, Codex, Orcheo, etc.) with a single command. * Local & GitHub Sources: Install from a local directory for development or use GitHub shorthand (owner/repo/path) to treat repositories as a live skill registry. * Full Lifecycle Management: A familiar CLI surface for your agent capabilities: install, update, uninstall, list, show, and validate. * Unified Observability: skill-mgr list provides a single source of truth for your system's "agent surface area" across all supported platforms.