nx_swarm_endpoint_lib.nx

nx_swarm_endpoint_lib.nx -- THE one act every swarm caller performs: resolve a ROLE to an ADDRESS. WHY (a live outage, measured 2026-07-30): the laptop GPU endpoint was a hardcoded string literal in FIVE files -- nx_mesh_lb:42, nx_swarm_coord:66, nx_worker_dispatch:67, nx_hostctl:268, nx_mgmt_api:456. DHCP moved the box from .193 to .192 and all five went stale in the same instant. nx_swarm_coord:66 even carried the comment "worker_dispatch SSOT" while COPYING the value -- a claimed single source of truth that was really a fifth duplicate. Meanwhile sd-server sat HEALTHY on the 5080 and all four swarm gates read GREEN, because a gate that measures the PLAN does not measure the REACHABILITY. LAW APPLIED: a fix that must be remembered at N sites has to bind to the ONE act all N perform. That act is this function. Callers ask for a role; nobody spells an address again. LAYER: lives in runtime/ (the PRIMITIVE layer) precisely so BOTH runtime/ organs and _hdl_build/ organs can import it -- the import edge is directed and primitives may not depend on tools (seq1450). Library only: NO main(), so any organ can import it without a duplicate entry. FAIL-CLOSED: unknown role or unreadable table returns 0, never a fabricated address. A wrong endpoint fails SILENTLY at dispatch; a missing one fails LOUDLY at resolve. Prefer loud. The table is re-read on every call (~1KB), so an address edit takes effect with no restart. license_tier: ORIGINAL