nx_probe.nx

nx_probe.nx -- on-device capability fingerprint with vendor-claim falsification gate. SA-1 milestone of NISHI_SELF_ASSEMBLY_ROADMAP.md. Every capability reported here was VERIFIED on this device via a micro-smoke at probe time -- the substrate never trusts a vendor claim (CPUID, HWCAP, datasheet) without an empirical witness. Per [[feedback-racing-crew-team-honesty-threat-aware]]: the Alder Lake AVX-512 fuse-off and lying-CSP cases publicly broke CPUID-trust; the racing line refuses that hack. Falsification gate: the caller may pass in a "claim" record asserting capabilities X / Y / Z; the probe runs the on-device smoke for each and increments `falsification_count` whenever a claim disagrees with the witnessed result. Smoke wins on conflict. The disagreement triggers downstream `nx_reselect` per SA-8. V1 capability set (SA-1 honest perf verdict): - canary_pre / canary_post (tamper-detect; per [[feedback-racing-crew-team-honesty-threat-aware]] `nx_canary_value`) - schema_version (bump on any field add) - isa_family (compile-time witness; refined at SA-3 manifest sweep) - endianness (write u32 0x12345678 / read byte 0) - pointer_width (compile-time witness; refined at SA-3) - page_size_bytes (mmap return alignment) - mono_clock_works (sys_clock_gettime_mono returns 0) - mono_clock_resolution_ns (two-sample delta minimum) - mmap_works (sys_mmap returns non-NULL) - write_works (sys_write to fd 1 returns count) - falsification_count + first-mismatch witness Gap list (V1): - no AVX-2 / AVX-512 / RVV / NEON / SVE falsification smoke yet (SA-1.5 -- needs cross-target nx_platform facade from [[NISHI_HARDWARE_AGNOSTIC_ROADMAP]] HA-1+) - no cache-geometry probe (queued for SA-2 nx_calibrate) - no NUMA / huge-page probe (SA-2) - no GPU / DSP / NPU presence probe (SA-1.5)