feat: regsub variable declaration check

package.json

@@ -2,7 +2,7 @@
   "name": "nx-post-support",
   "displayName": "NX Postprocessor Support",
   "description": "",
-  "version": "2025.9.100",
+  "version": "2025.9.101",
   "publisher": "Christoph",
   "icon": "images/nx-1.png",
   "serverInfo": {

server/src/tools/checks.py

@@ -120,6 +120,15 @@ class UndeclaredVariableCheck(Visitor):
                         base = text.split("(", 1)[0]  # Handle array syntax
                         if not base.startswith("::"):
                             locals_set.add(base)
+                elif name == "regsub" and node.args:
+                    # regsub ?switches? exp string subSpec ?varName?
+                    # If a varName is provided as the last arg, treat it as a local
+                    last_arg = node.args[-1]
+                    text = _word_text(last_arg)
+                    if text:
+                        base = text.split("(", 1)[0]
+                        if base and not base.startswith("::"):
+                            locals_set.add(base)
                 elif name == "foreach" and len(node.args) >= 3:
                     # foreach varlist1 list1 ?varlist2 list2 ...? body
                     # Treat loop variables as locals within the proc

server/src/tools/semantic_tokens.py

@@ -108,6 +108,12 @@ class _Highlighter(Visitor):
             if name == "global":
                 line, col = routine.contents_pos
                 self._tokens.append((((line - 1, col - 1), len(name), "keyword", [])))
+                first_arg = command.args[0]
+                token_info = self._get_token_info(first_arg)
+                if token_info:
+                    (line, col), length = token_info
+                    mods = [TokenModifier.declaration, TokenModifier.write]
+                    self._tokens.append(((line, col), length, "variable", mods))
 
         if routine.contents == "puts":
             line, col = routine.contents_pos