Run the full audit command: execute analyses, print results, return exit code.
Run audit, optionally tagged with a gate marker (e.g. "pre-commit") so
Fallow Impact can record a containment event when the gate blocks then
clears. The marker only affects the local Impact store; it never changes
the verdict, exit code, or output.
Run the standalone fallow decision-surface command: the separable, cheap
apex. Executes the SAME changed-code analysis the review brief runs (it is
the brief path, NOT the full project pipeline), then emits ONLY the decision
surface envelope. Always exit 0 (the surface is advisory, never a gate).