chore: restore .gemini conductor agent files

.gemini/tools/get_file_summary.json

@@ -0,0 +1,17 @@
+{
+  "name": "get_file_summary",
+  "description": "Get a compact heuristic summary of a file without reading its full content. For Python: imports, classes, methods, functions, constants. For TOML: table keys. For Markdown: headings. Others: line count + preview. Use this before read_file to decide if you need the full content.",
+  "parameters": {
+    "type": "object",
+    "properties": {
+      "path": {
+        "type": "string",
+        "description": "Absolute or relative path to the file to summarise."
+      }
+    },
+    "required": [
+      "path"
+    ]
+  },
+  "command": "python scripts/tool_call.py get_file_summary"
+}