pack install <path-or-url> [--force]
Install a plugin pack (hermes-pack.yaml) — a declarative set of plugins each pinned to an exact 40-character commit SHA. Shows a mandatory review screen (every plugin, source, pinned ref, declared capabilities), asks one confirmation for the pack contents, then runs ordinary pinned installs. Each plugin's declared capabilities still go through the standard per-plugin consent — a pack never bulk-grants. Partial failures are reported per plugin; exits non-zero when any plugin failed. Interactive only (no --yes).
From the official Hermes Agent CLI reference.