Centralizes plugin registry in a committed, machine-independent format
rather than relying solely on local ~/.claude/plugins install state.
Enables cc-architect's structural validator to verify plugins against the
manifest, and makes the registry shareable across clones. Part of
cross-repo standards-centralization (jaredswanson/cc-plugins#13).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UmdZ3xYPSGpuGv8V3mNv6c
jared