按推荐建议，继续执行

结论：新增 standalone CNC 语义守卫，禁止在 wrapper/tools/tests 中重新定义 Interp::convert_g()，确保 G-code 转换继续走 vendored LinuxCNC interp_convert.cc。

wasm-port/tools/verify_no_standalone_cnc_semantics.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+
+TMP_FILE="$(mktemp)"
+trap 'rm -f "$TMP_FILE"' EXIT
+
+find \
+  "$ROOT_DIR/runtime" \
+  "$ROOT_DIR/tests" \
+  "$ROOT_DIR/tools" \
+  -type f \
+  \( -name '*.c' -o -name '*.cc' -o -name '*.cpp' -o -name '*.h' -o -name '*.hh' -o -name '*.hpp' -o -name '*.js' -o -name '*.ts' \) \
+  ! -path "$ROOT_DIR/vendor/*" \
+  ! -path "$ROOT_DIR/runtime/ui/ini-panel/linuxcnc_ini.js" \
+  -print0 |
+  xargs -0 grep -nE '^[[:space:]]*int[[:space:]]+Interp::convert_g[[:space:]]*\(' > "$TMP_FILE" || true
+
+if [[ -s "$TMP_FILE" ]]; then
+  echo "standalone Interp::convert_g definitions are not allowed:" >&2
+  cat "$TMP_FILE" >&2
+  exit 1
+fi
+
+echo "standalone CNC semantics guard complete"