- 2026-03-06: Updated `src/main_streamer.cpp` to remove explicit `has_help_flag`/`print_help` preflight checks and treat empty/`help` parse result as graceful exit.
- `parse_runtime_config` in `src/config/runtime_config.cpp` now returns `std::unexpected("")` for help path (via `app.exit(e) == 0`) and `std::unexpected("parse_error")` for parse failures.
- Kept `--help` behavior delegated to CLI11: `./build/cvmmap_streamer --help` prints CLI11-generated help and exits non-zero through parse path logging in current wrapper.
- Verified with `cmake --build build` and CLI smoke commands: `--help`, `--definitely-invalid`, and no-arg execution (shows runtime config then fails runtime stage as expected).

- 2026-03-06: applied concrete edits: streamer now relies on parse_runtime_config returning "help"/"parse_error" and main handles those exits directly (help=>0, parse_error=>2).

- 2026-03-06: completed remaining task checks: grep-verified no manual streamer help preflight in main, plus help parse/parse_error control flow validated with --help exit 0 and invalid flag exit 2; note appended.