按推荐建议，继续执行

结论：已将 LinuxCNC 5axiskins 及 switchkins 相关源码纳入 vendored manifest、native probe 和文档验证链，完整 native 验证通过。

wasm-port/docs/compatibility-validation.md

@@ -53,6 +53,7 @@ The validation fails if:
 | `linuxcnc_parameter_file_harness` | Validates LinuxCNC parameter file restore/save behavior and required/read-only parameter handling. |
 | `linuxcnc_tp_api_probe` | Validates vendored LinuxCNC trajectory planner calls for linear, arc, and queued motion paths. |
 | `linuxcnc_kinematics_probe` | Validates vendored LinuxCNC `trivkins.c` plus `kins_util.c` initialize and perform identity forward/inverse mapping through the standalone HAL/RTAPI boundary. |
+| `linuxcnc_5axis_kinematics_probe` | Validates vendored LinuxCNC `5axiskins.c` through `switchkins.c`, including 5-axis forward/inverse round-trip behavior and switching to identity kinematics. |
 
 ## Fixture Coverage
 
@@ -95,5 +96,7 @@ The current fixture expectations validate standalone behavior against the
 vendored LinuxCNC source path. They do not yet run a side-by-side native
 LinuxCNC executable comparison for each fixture.
 
-The kinematics probe currently covers LinuxCNC identity/trivial kinematics
-only. Non-trivial and 5-axis kinematics still need dedicated machine baselines.
+The kinematics probes currently cover LinuxCNC identity/trivial kinematics and
+the switchable `5axiskins` XYZBCW bridge-mill model. TRT `xyzac`/`xyzbc`,
+serial, delta, SCARA, and other machine-specific kinematics still need
+dedicated baselines.