diff --git a/wasm-port/docs/porting-steps-standalone.md b/wasm-port/docs/porting-steps-standalone.md
index 8aa6e45..6a49e5e 100644
--- a/wasm-port/docs/porting-steps-standalone.md
+++ b/wasm-port/docs/porting-steps-standalone.md
@@ -479,6 +479,10 @@ Current verified progress:
   compiled as C with `gcc` so its LinuxCNC C linkage is preserved. The
   standalone `rtapi.h` shim was made C/C++ compatible for this C-source
   boundary without changing vendored LinuxCNC files.
+- `inifile.cc` now has its own direct source compile probe in addition to the
+  existing INI parser harness. With this probe, every `.c` and `.cc` file
+  listed in `tools/source-manifest.txt` has a native source-level compile
+  check under the standalone build boundary.
 
 ## 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 96ff56a..fe690d6 100755
--- a/wasm-port/tests/native/verify_native_probes.sh
+++ b/wasm-port/tests/native/verify_native_probes.sh
@@ -33,6 +33,7 @@ check_exitcode() {
 }
 
 check_exitcode linuxcnc_interp_state_probe
+check_exitcode linuxcnc_inifile_source_probe
 check_exitcode linuxcnc_tp_api_probe
 check_exitcode linuxcnc_tp_api_probe.run
 for name in \
diff --git a/wasm-port/tools/build_native_probes.sh b/wasm-port/tools/build_native_probes.sh
index 73fd6aa..fb84ede 100755
--- a/wasm-port/tools/build_native_probes.sh
+++ b/wasm-port/tools/build_native_probes.sh
@@ -486,6 +486,12 @@ build_binary_target \
   NO_LINK_FLAGS \
   -lfmt
 
+build_object_target \
+  linuxcnc_inifile_source_probe \
+  "$BUILD_DIR/linuxcnc_inifile_source_probe.o" \
+  "$VENDOR_DIR/src/emc/ini/inifile.cc" \
+  COMMON_INI_FLAGS
+
 build_binary_target \
   linuxcnc_interp_state_probe \
   "$BUILD_DIR/linuxcnc_interp_state_probe" \