Refine agent prompt to avoid unnecessary tool use and fix gitignore matching for nested paths

Update system prompt rules so the model answers simple questions directly
instead of always calling tools.  Fix _gitignore_match to correctly handle
bare directory patterns and ** globs in nested paths.

Author: johnteee

teaagent/prompt.py

@@ -17,8 +17,10 @@
 {"type":"final","content":"answer"}
 
 Rules:
-- Use tools when workspace inspection or execution is needed.
-- Use final only when the task is complete or cannot proceed.
+- If the task is a simple question or chat that does not require workspace access, respond immediately with a final answer.
+- Use tools only when you need to inspect or modify files, run commands, or gather information from the workspace.
+- Do not use tools to explore the workspace unless the task specifically requires it.
+- Use final when you have enough information to answer, or when the task is complete.
 - Do not invent tool names or arguments.
 - Destructive tools may be blocked unless the user explicitly enables destructive actions.
 """

teaagent/workspace_tools/_config.py

@@ -70,6 +70,16 @@ def matcher(rel_path: str) -> bool:
 
 
 def _gitignore_match(rel_path: str, pattern: str) -> bool:
+    path_parts = Path(rel_path).parts
     if '/' not in pattern and '**' not in pattern:
-        return fnmatch(Path(rel_path).name, pattern)
+        if fnmatch(path_parts[-1], pattern):
+            return True
+        return any(part == pattern for part in path_parts)
+    if '**' in pattern:
+        segments = pattern.split('/')
+        glob_dir = segments[-1] if segments[-1] != '**' else None
+        if glob_dir:
+            return any(part == glob_dir for part in path_parts)
+        dir_name = segments[-2] if len(segments) >= 2 else segments[0]
+        return any(part == dir_name for part in path_parts)
     return fnmatch(rel_path, pattern)