diff --git a/check-linuxcnc-wasm-blockers-source-map.sh b/check-linuxcnc-wasm-blockers-source-map.sh
index 74ff735..cd7028d 100755
--- a/check-linuxcnc-wasm-blockers-source-map.sh
+++ b/check-linuxcnc-wasm-blockers-source-map.sh
@@ -6,7 +6,7 @@ cd "$(dirname "$0")"
 # LinuxCNC source basis: this guard ties the documented WASM blocker map to
 # LinuxCNC RS274/Python/remap/tooldata sources, the rs274 WASM manifest, and
 # wasm-safe shim replacement sources. It validates source coverage only; it
-# does not add CNC behavior or expand smoke parsing.
+# does not add CNC behavior, expand smoke parsing, or interpret G-code.
 linuxcnc_root=${LINUXCNC_ROOT:-../linuxcnc}
 manifest=${1:-linuxcnc-rs274-wasm-source-files.txt}
 
@@ -147,7 +147,18 @@ for phrase in [
     "must not become smoke parser behavior",
     "blocked `dlopen` and blocked tooldata-users remain empty",
     "Python/Boost.Python remap paths remain tracked blockers",
+    "./check-linuxcnc-wasm-blockers-source-map.sh",
+    "does not interpret G-code",
 ]:
     if phrase not in source_map:
         raise SystemExit(f"docs/linuxcnc-wasm-blockers-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-blockers-source-map.sh" not in text:
+        raise SystemExit(f"{entry} must run ./check-linuxcnc-wasm-blockers-source-map.sh")
 PY
diff --git a/docs/linuxcnc-wasm-blockers-source-map.md b/docs/linuxcnc-wasm-blockers-source-map.md
index dec93f5..7f11c81 100644
--- a/docs/linuxcnc-wasm-blockers-source-map.md
+++ b/docs/linuxcnc-wasm-blockers-source-map.md
@@ -67,6 +67,14 @@ Required tracked core examples:
 - `src/emc/rs274ngc/interp_o_word.cc`
 - `src/emc/rs274ngc/rs274ngc_pre.cc`
 
+## Boundaries
+
+- `test-native.sh`, `test-linuxcnc-source-link.sh`, and `build-wasm.sh` must
+  run `./check-linuxcnc-wasm-blockers-source-map.sh` before consuming blocker
+  analyzer output, source-linked LinuxCNC objects, or browser artifacts.
+- The WASM blockers source-map guard validates LinuxCNC source/blocker
+  ownership and manifest drift only; it does not interpret G-code.
+
 ## Checks
 
 Run:
@@ -76,6 +84,7 @@ Run:
 ./test-linuxcnc-wasm-blockers.sh linuxcnc-rs274-wasm-source-files.txt
 ./test-native.sh
 ./test-linuxcnc-source-link.sh
+./build-wasm.sh
 ```
 
 `check-linuxcnc-wasm-blockers-source-map.sh` keeps this document, the