nx_build_safe.nx

nx_build_safe.nx -- the Engineer's HANG-SAFE build capability (operator: keep building the team to handle this). Even with the G2 compiler FOUND, the codegen HANGS on a huge program (the TLS daemon: the background build produced 0 bytes of asm after minutes). The compiler is also non-deterministic (a retry may pass) and can miscompile. So a robust build must: compile under a TIMEOUT; classify each attempt (OK / HANG / ERROR); RETRY the same compiler (non-determinism); ESCALATE to an alternative compiler after repeated hangs; and -- crucially -- never report a false success (an empty/hung build is HANG, not OK), giving an HONEST EXHAUSTED verdict if nothing produces a runnable artifact. This is what the memory's nx_run_timeout + recompile-retry discipline becomes as a first-class capability. license_tier: ORIGINAL Pairs with nx_build_gate + the Engineer's eng_build_gate.