diff --git a/check-linuxcnc-wasm-smoke-source-map.sh b/check-linuxcnc-wasm-smoke-source-map.sh
index 49ab87f..b04ca7d 100755
--- a/check-linuxcnc-wasm-smoke-source-map.sh
+++ b/check-linuxcnc-wasm-smoke-source-map.sh
@@ -7,7 +7,7 @@ cd "$(dirname "$0")"
 # LinuxCNC RS274 parameter/INI handling, M-code canon side effects, generated
 # switchkins/remap config cases, kinematics sources, and OPFS-only browser
 # persistence. It validates smoke-test source coverage only; it does not add
-# CNC behavior or expand smoke parsing.
+# CNC behavior, expand smoke parsing, or interpret G-code.
 linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
 linuxcnc_root=$(cd "$linuxcnc_root" && pwd)
 
@@ -179,8 +179,18 @@ required_phrases = [
     "OPFS workspace/policy/directory handling",
     'unlinking `filename + ".bak"`',
     "./check-linuxcnc-wasm-smoke-source-map.sh",
+    "does not interpret G-code",
 ]
 for phrase in required_phrases:
     if phrase not in source_map:
         raise SystemExit(f"docs/linuxcnc-wasm-smoke-source-map.md missing boundary phrase: {phrase}")
+
+for entry in [
+    "test-native.sh",
+    "test-linuxcnc-source-link.sh",
+    "build-wasm.sh",
+]:
+    text = Path(entry).read_text(encoding="utf-8")
+    if "./check-linuxcnc-wasm-smoke-source-map.sh" not in text:
+        raise SystemExit(f"{entry} must run ./check-linuxcnc-wasm-smoke-source-map.sh")
 PY
diff --git a/docs/linuxcnc-wasm-smoke-source-map.md b/docs/linuxcnc-wasm-smoke-source-map.md
index 65a9d8d..573c66c 100644
--- a/docs/linuxcnc-wasm-smoke-source-map.md
+++ b/docs/linuxcnc-wasm-smoke-source-map.md
@@ -55,6 +55,11 @@ OPFS-only is the required boundary.
   restore/save failure handling, and browser app OPFS reload coverage.
 - Smoke wrappers must keep positive minimum coverage thresholds so accidental
   section loss is visible.
+- `test-native.sh`, `test-linuxcnc-source-link.sh`, and `build-wasm.sh` must
+  run `./check-linuxcnc-wasm-smoke-source-map.sh` before consuming Node/browser
+  WASM smoke coverage or browser artifacts.
+- The WASM smoke source-map guard validates LinuxCNC source-backed smoke
+  coverage only; it does not interpret G-code.
 
 ## Checks
 
@@ -64,6 +69,7 @@ Run:
 ./check-linuxcnc-wasm-smoke-source-map.sh
 ./test-native.sh
 ./test-linuxcnc-source-link.sh
+./build-wasm.sh
 ```
 
 `check-linuxcnc-wasm-smoke-source-map.sh` keeps this document, LinuxCNC source