按建议，继续工作

结论：已新增 cutter compensation 平面切换拒绝 fixture，固定 vendored LinuxCNC convert_cutter_compensation_on() 与 convert_set_plane() 的错误路径；native probe 全量验证通过。

wasm-port/docs/source-reuse-map.md

@@ -66,6 +66,9 @@ Current validation is intentionally mechanical:
   source-probe level. Serial `genserkins`, hexapod `genhexkins`, and pentapod
   `pentakins` have native runtime baselines; full runtime machine baselines for
   userspace genser flows are not yet established.
+- Cutter compensation negative interpreter paths are fixture-covered through
+  vendored `interp_convert.cc`, but a positive cutter-compensated motion
+  runtime baseline is not yet established for the standalone harness.
 - Browser/WASM C ABI and JS SDK layers are not yet built for the full
   interpreter/planner core.
 - OPFS persistence is not yet connected to INI, tool table, parameter file, or