diff --git a/check-linuxcnc-wasm-shims-source-map.sh b/check-linuxcnc-wasm-shims-source-map.sh
index 82cdcfe..661c364 100755
--- a/check-linuxcnc-wasm-shims-source-map.sh
+++ b/check-linuxcnc-wasm-shims-source-map.sh
@@ -47,6 +47,7 @@ grep -F 'int hal_get_pin_value_by_name(' "$linuxcnc_root/src/hal/hal_lib.c" >/de
 grep -F 'int hal_get_signal_value_by_name(' "$linuxcnc_root/src/hal/hal_lib.c" >/dev/null
 grep -F 'int hal_get_param_value_by_name(' "$linuxcnc_root/src/hal/hal_lib.c" >/dev/null
 grep -F 'wordexp(basename, &exp_result, 0);' "$linuxcnc_root/src/emc/rs274ngc/rs274ngc_pre.cc" >/dev/null
+grep -F '#include "nml_intf/emc_nml.hh"' "$linuxcnc_root/src/emc/sai/dummyemcstat.cc" >/dev/null
 grep -F 'EMC_STAT *emcStatus = new EMC_STAT;' "$linuxcnc_root/src/emc/sai/dummyemcstat.cc" >/dev/null
 grep -F 'int NMLmsg::automatically_clear = 1;' \
     "$linuxcnc_root/src/libnml/nml/nmlmsg.cc" >/dev/null
@@ -180,6 +181,7 @@ runtime_shim = Path("core/wasm_shims/linuxcnc_runtime_shim.cc").read_text(encodi
 runtime_probe = Path("core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc").read_text(encoding="utf-8")
 dlfcn_shim = Path("core/wasm_shims/dlfcn.cc").read_text(encoding="utf-8")
 dlfcn_header = Path("core/wasm_shims/dlfcn.h").read_text(encoding="utf-8")
+emc_status_shim = Path("core/wasm_shims/emc_status_shim.cc").read_text(encoding="utf-8")
 gettext_shim = Path("core/wasm_shims/gettext_shim.cc").read_text(encoding="utf-8")
 for needle in [
     "#define RTLD_GLOBAL 0x00100",
@@ -203,6 +205,12 @@ for needle in [
 ]:
     if needle not in dlfcn_shim:
         raise SystemExit(f"dlfcn shim missing unavailable-loader boundary: {needle}")
+for needle in [
+    '#include "nml_intf/emc_nml.hh"',
+    "EMC_STAT *emcStatus = new EMC_STAT;",
+]:
+    if needle not in emc_status_shim:
+        raise SystemExit(f"EMC status shim missing detached LinuxCNC status singleton: {needle}")
 for needle in [
     "extern \"C\" char *gettext(const char *msgid)",
     "return const_cast<char *>(msgid ? msgid : \"\");",
@@ -306,6 +314,7 @@ for phrase in [
     "browser-safe LinuxCNC adaptations",
     "LinuxCNC `interp_base.cc` dynamic loader calls",
     "unavailable-loader returns",
+    "detached LinuxCNC `EMC_STAT` singleton",
     "LinuxCNC `_()` diagnostic call sites",
     "browser gettext catalogs unavailable",
     "LinuxCNC NML status constructors",
diff --git a/docs/linuxcnc-wasm-shims-source-map.md b/docs/linuxcnc-wasm-shims-source-map.md
index f91eb8f..d48c0d7 100644
--- a/docs/linuxcnc-wasm-shims-source-map.md
+++ b/docs/linuxcnc-wasm-shims-source-map.md
@@ -15,7 +15,7 @@ only; it must not add CNC behavior and must not expand the temporary smoke parse
 | Shim | LinuxCNC source basis | Boundary |
 | --- | --- | --- |
 | `core/wasm_shims/dlfcn.cc` | `src/emc/rs274ngc/interp_base.cc` | Satisfies LinuxCNC `interp_base.cc` dynamic loader calls and RTLD flags for browser-safe probes while keeping dynamic loading unavailable. |
-| `core/wasm_shims/emc_status_shim.cc` | `src/emc/sai/dummyemcstat.cc` | Provides the source-backed `emcStatus` singleton shape without task/NML startup. |
+| `core/wasm_shims/emc_status_shim.cc` | `src/emc/sai/dummyemcstat.cc` | Provides the detached LinuxCNC `EMC_STAT` singleton shape without task/NML startup. |
 | `core/wasm_shims/gettext_shim.cc` | `src/emc/rs274ngc/interp_internal.hh` | Preserves LinuxCNC `_()` diagnostic call sites by satisfying `gettext()` while leaving browser gettext catalogs unavailable. |
 | `core/wasm_shims/linuxcnc_runtime_shim.cc` | `src/emc/rs274ngc/gcodemodule.cc`, `src/emc/task/emctaskmain.cc`, `src/emc/task/taskclass.cc`, `src/emc/rs274ngc/interp_namedparams.cc`, `include/hal.h`, `src/hal/hal_lib.c`, `src/emc/rs274ngc/rs274ngc_pre.cc` | Keeps preview/task, builtin Python module, unavailable HAL lookup, and `wordexp()` edges compile-safe. |
 | `core/wasm_shims/nml_status_shim.cc` | `src/libnml/nml/nmlmsg.cc`, `src/libnml/nml/stat_msg.cc` | Provides LinuxCNC NML status constructors, clear behavior, and `RCS_STAT_MSG` default status fields needed by source-linked EMC status objects. |
@@ -33,6 +33,9 @@ only; it must not add CNC behavior and must not expand the temporary smoke parse
   `dlerror()`, `RTLD_GLOBAL`, and `RTLD_NOW`; their unavailable-loader returns
   must keep handles and symbols null, keep `dlerror()` diagnostic text stable,
   and leave `dlclose()` side-effect free.
+- `core/wasm_shims/emc_status_shim.cc` must stay limited to the detached
+  LinuxCNC `EMC_STAT` singleton from `src/emc/sai/dummyemcstat.cc`; it must not
+  pull in task startup, NML channels, or operator callback behavior.
 - `core/wasm_shims/linuxcnc_runtime_shim.cc` must keep `_task=0` for preview,
   matching `src/emc/rs274ngc/gcodemodule.cc`; it must not switch browser-safe probes into task mode.
 - The HAL lookup shim covers `hal_get_pin_value_by_name()`,