Phase 2 of the god-file decomposition plan. main()'s argparse tree is 179
inline add_parser calls in one 3,297-line function. This establishes the
hermes_cli/subcommands/ package and extracts the first group (cron) as the
proof-of-pattern:
- hermes_cli/subcommands/_shared.py: shared parser helpers (add_accept_hooks_flag),
re-exported from main.py for backwards compat.
- hermes_cli/subcommands/cron.py: build_cron_parser(subparsers, cmd_cron=...).
Handler injected so the module never imports main (cycle avoidance).
- main()'s ~155-line inline cron block becomes one build_cron_parser() call.
Behavior-neutral: 'hermes cron create --help' output is byte-identical to
origin/main. main() 3297 -> 3143 LOC.
Validation: tests/hermes_cli/ 6466 passed / 0 failed under per-file process
isolation; new test_subcommands_cron.py covers subactions, aliases, options,
no-agent tristate, injected dispatch, and --accept-hooks.
