Function command_workload_matrix 

pub fn command_workload_matrix() -> Value

Per-command parallelism posture (agent discovery / doctor).

Every multi-item command either fans out under effective_limit or has an explicit sequential justification (single CDP session, single-writer journal, atomic rewrite apply, or cost ≪ coordination overhead).

Pass 24–25: by_command maps each top-level CLI command and multi-item nested subcommands so agents never treat sequential single-act paths as forgotten parallelism. Gates must match code (PAR-73 honesty).