add variable indexing keep track of postion

server/src/tools/completion_items.py

@@ -2,6 +2,8 @@ from tclint.syntax_tree import Visitor, Command, BareWord, List
 import lsprotocol.types as lsp
 from common.load_data import standard_items
 
+BUILTIN_VAR_LABELS = {ci.label for ci in standard_items.nx_variables}
+
 
 class CompletionItems:
     def __init__(self):
@@ -34,23 +36,25 @@ class _Completion(Visitor):
         self._custom_functions = []
         self._proc_signatures = {}
 
+    def _append_unique(self, item: lsp.CompletionItem):
+        # Avoid duplicate labels within the same file scan
+        if not any(ci.label == item.label for ci in self._custom_functions):
+            self._custom_functions.append(item)
+
     def visit_command(self, command: Command):
         routine = command.routine
 
+        # Collect custom proc names and their signatures
         if routine.contents == "proc" and command.args:
             first_arg = command.args[0]
-            if not first_arg.value:
+            if not getattr(first_arg, "value", None):
                 return
 
             if any(item.label == first_arg.value for item in standard_items.nx_procs):
                 return
 
-            try:
-                self._custom_functions.remove(first_arg.value)
-            except ValueError:
-                pass
-
-            self._custom_functions.append(lsp.CompletionItem(label=first_arg.value, kind=lsp.CompletionItemKind.Function))
+            # Record proc name as a completion item
+            self._append_unique(lsp.CompletionItem(label=first_arg.value, kind=lsp.CompletionItemKind.Function))
             if len(command.args) < 2:
                 return
 
@@ -69,6 +73,24 @@ class _Completion(Visitor):
 
             self._proc_signatures[first_arg.value] = param_names
 
+        # Collect global variables declared with: global var1 var2 ...
+        elif routine.contents == "global" and command.args:
+            for arg in command.args:
+                if isinstance(arg, BareWord) and getattr(arg, "value", None):
+                    if arg.value not in BUILTIN_VAR_LABELS:
+                        self._append_unique(lsp.CompletionItem(label=arg.value, kind=lsp.CompletionItemKind.Variable))
+
+        # Collect variables set with explicit global namespace: set ::var_name ...
+        elif routine.contents == "set" and command.args:
+            first = command.args[0]
+            if isinstance(first, BareWord) and getattr(first, "value", None):
+                var_name = first.value
+                if var_name.startswith("::"):
+                    base_name = var_name.split("(", 1)[0]
+                    clean_name = base_name[2:]  # remove leading '::' for completion display
+                    if clean_name not in BUILTIN_VAR_LABELS:
+                        self._append_unique(lsp.CompletionItem(label=clean_name, kind=lsp.CompletionItemKind.Variable))
+
 
 def remove_existing_items(items: list[lsp.CompletionItem], store: dict) -> None:
     """

server/src/tools/variable_index.py

@@ -0,0 +1,100 @@
+import re
+from dataclasses import dataclass
+from typing import Dict, Set, List, Tuple
+
+# Reuse patterns similar to document_symbols
+NS_RE = re.compile(r"^\s*namespace\s+eval\s+([^\s\{]+)")
+PROC_RE = re.compile(r"^\s*proc\s+([^\s\{]+)\s+\{.*\}\s+\{")
+SET_RE = re.compile(r"^\s*set\s+([^\s\}]+)")
+
+
+@dataclass
+class ProcRange:
+    name: str
+    start_line: int
+    end_line: int | None = None
+
+
+def build_variable_index(source: str) -> tuple[Set[str], Dict[str, Set[str]], List[ProcRange]]:
+    """
+    Parse Tcl source text and build:
+    - globals: set of variable names considered global suggestions
+    - procs: mapping proc_name -> set of local variable names (set without :: inside that proc)
+    - proc_ranges: list of ProcRange (name, start_line, end_line)
+
+    Rules:
+    - set ::var -> global var suggestion (strip leading :: and any array index "(")
+    - set var without :: at top level (not in namespace/proc) -> global suggestion
+    - set var without :: inside proc -> local to that proc
+    - set var inside namespace (no ::) is ignored for global suggestions
+    """
+    lines = source.split("\n")
+
+    class Scope:
+        def __init__(self, name: str, kind: str, start_line: int):
+            self.name = name
+            self.kind = kind  # "namespace" or "proc" or "root"
+            self.start_line = start_line
+            self.brace_count = 0
+
+    globals_set: Set[str] = set()
+    procs: Dict[str, Set[str]] = {}
+    proc_ranges: List[ProcRange] = []
+
+    scope_stack: List[Scope] = [Scope("", "root", 0)]
+
+    for i, line in enumerate(lines):
+        ns_match = NS_RE.match(line)
+        proc_match = PROC_RE.match(line)
+        set_match = SET_RE.match(line)
+
+        # Namespace scope
+        if ns_match:
+            scope_stack.append(Scope(ns_match.group(1), "namespace", i))
+
+        # Proc scope
+        elif proc_match:
+            pname = proc_match.group(1)
+            scope_stack.append(Scope(pname, "proc", i))
+            proc_ranges.append(ProcRange(name=pname, start_line=i, end_line=None))
+
+        # Track set statements
+        if set_match:
+            raw_name = set_match.group(1)
+            # Normalize array names and leading ::
+            base = raw_name.split("(", 1)[0]
+            if base.startswith("::"):
+                clean = base[2:]
+                globals_set.add(clean)
+            else:
+                top = scope_stack[-1]
+                if top.kind == "root":
+                    globals_set.add(base)
+                elif top.kind == "proc":
+                    procs.setdefault(top.name, set()).add(base)
+                else:
+                    # inside namespace without :: -> ignore for globals
+                    pass
+
+        # Brace balancing for current top scope
+        open_count = line.count("{")
+        close_count = line.count("}")
+        scope_stack[-1].brace_count += open_count - close_count
+
+        # Close finished scopes
+        while len(scope_stack) > 1 and scope_stack[-1].brace_count <= 0:
+            finished = scope_stack.pop()
+            if finished.kind == "proc":
+                # Update the last matching proc range end_line
+                for pr in reversed(proc_ranges):
+                    if pr.name == finished.name and pr.end_line is None:
+                        pr.end_line = i
+                        break
+
+    # Finalize any unterminated proc ranges
+    for pr in proc_ranges:
+        if pr.end_line is None:
+            pr.end_line = len(lines) - 1
+
+    return globals_set, procs, proc_ranges
+