nx_shipfleet_lib.nx

nx_shipfleet_lib.nx -- the PURE decision core for INTELLIGENT (adaptive-concurrency) shipping. Composes the estate's polite headroom budget (nx_resource_governor rg_worker_budget/rg_hw_budget) with an AIMD cap that responds to the DIRECT I/O-storm signal (nx_build_admit's exit code), so a fleet of ships runs as WIDE as the box allows RIGHT NOW and no wider: additive-increase +1 on progress, multiplicative-decrease (halve) on a storm refusal. This is TCP congestion control applied to build admission -- the field infers congestion from latency (minRTT/RTT gradient, Netflix concurrency-limits, Envoy adaptive_concurrency, ThomWright/congestion-limiter); OUR exceed is that the signal is MEASURED, not inferred -- nx_build_admit reads /proc D-state directly. Pure policy: host signals passed in, no syscalls, so the gate can bite-prove the whole state machine. license_tier: ORIGINAL