run_batch

Run at most 256 independent commands with at most 64 worker tasks. Results retain input order; execution order is unspecified. A command error does not skip independent siblings. One monotonic budget includes admission and all workers; cancellation stops new admission and retains sent-effect uncertainty. The call joins every worker before returning. There is no replay or fallback.

run_batch(target, commands; concurrency=4, timeout=5.0, cancel=nothing)

All control commands are validated before effects. Raw Server commands retain their responses, but successful per-operation completion is :unknown unless the command matches the audited synchronous grammar. This deliberately does not equate an arbitrary process response with background-job completion.