diff --git a/wasm-port/docs/porting-steps-standalone.md b/wasm-port/docs/porting-steps-standalone.md
index cc84a72..50f6f5b 100644
--- a/wasm-port/docs/porting-steps-standalone.md
+++ b/wasm-port/docs/porting-steps-standalone.md
@@ -445,6 +445,11 @@ Current verified progress:
   `interp_convert.cc`. The required `emcStatus` shim is limited to the native
   status boundary used by `tag_arc()` for machine units; it is not a
   project-authored CNC behavior implementation.
+- `tools/build_native_probes.sh` now also includes direct source compile
+  probes for vendored `interp_read.cc`, `interp_check.cc`, and
+  `interp_execute.cc`. These probes keep the next interpreter-core migration
+  work focused on LinuxCNC source entry points and expose missing standalone
+  runtime shims before wrapper behavior is expanded.
 
 ## Phase 4: Port INI Parsing Without Editing Upstream
 
diff --git a/wasm-port/tests/native/verify_native_probes.sh b/wasm-port/tests/native/verify_native_probes.sh
index 5ba92c7..725f9fb 100755
--- a/wasm-port/tests/native/verify_native_probes.sh
+++ b/wasm-port/tests/native/verify_native_probes.sh
@@ -42,6 +42,9 @@ check_exitcode linuxcnc_parameter_file_harness
 check_exitcode linuxcnc_parameter_file_harness.run
 check_exitcode linuxcnc_rs274_compile_probe
 check_exitcode linuxcnc_interp_convert_source_probe
+check_exitcode linuxcnc_interp_read_source_probe
+check_exitcode linuxcnc_interp_check_source_probe
+check_exitcode linuxcnc_interp_execute_source_probe
 
 NAMEDPARAM_STDOUT="$BUILD_DIR/linuxcnc_namedparam_harness.run.stdout.log"
 grep -Fq "init_named_parameters=0" "$NAMEDPARAM_STDOUT"
diff --git a/wasm-port/tools/build_native_probes.sh b/wasm-port/tools/build_native_probes.sh
index 402a0ac..c3a6e96 100755
--- a/wasm-port/tools/build_native_probes.sh
+++ b/wasm-port/tools/build_native_probes.sh
@@ -459,4 +459,22 @@ build_object_target \
   "$VENDOR_DIR/src/emc/rs274ngc/interp_convert.cc" \
   COMMON_FLAGS
 
+build_object_target \
+  linuxcnc_interp_read_source_probe \
+  "$BUILD_DIR/linuxcnc_interp_read_source_probe.o" \
+  "$VENDOR_DIR/src/emc/rs274ngc/interp_read.cc" \
+  COMMON_FLAGS
+
+build_object_target \
+  linuxcnc_interp_check_source_probe \
+  "$BUILD_DIR/linuxcnc_interp_check_source_probe.o" \
+  "$VENDOR_DIR/src/emc/rs274ngc/interp_check.cc" \
+  COMMON_FLAGS
+
+build_object_target \
+  linuxcnc_interp_execute_source_probe \
+  "$BUILD_DIR/linuxcnc_interp_execute_source_probe.o" \
+  "$VENDOR_DIR/src/emc/rs274ngc/interp_execute.cc" \
+  COMMON_FLAGS
+
 echo "native probes complete"