按推荐建议，继续执行

结论：已接入 LinuxCNC NURBS G6 canonical 边界事件记录，并新增 G6.2 回归 fixture；原生 probe 验证通过。

wasm-port/docs/porting-steps-standalone.md

@@ -409,6 +409,12 @@ Current verified progress:
   `tests/fixtures/gcode/nurbs_g5_semantics.ngc` and
   `tests/fixtures/canon/nurbs_g5_semantics.events` pin `G5.2` control-point
   collection and `G5.3` NURBS feed emission.
+- `runtime/core/linuxcnc_wrap/linuxcnc_interp_minimal_runtime.cpp` now records
+  NURBS G6 canonical boundary calls emitted by vendored
+  `interp_convert.cc::convert_nurbs()`: `NURBS_G6_FEED`.
+  `tests/fixtures/gcode/nurbs_g6_semantics.ngc` and
+  `tests/fixtures/canon/nurbs_g6_semantics.events` pin `G6.2` order,
+  interpolation mode, control-point, weight, and K segment handling.
 - `tests/fixtures/gcode_errors/g1_zero_feed.ngc` and
   `tests/fixtures/canon_errors/g1_zero_feed.expected` pin the negative
   `G1` zero-feed case. The source basis is LinuxCNC