Function parse_key_spec

common/chat-peg-parser.cpp:566–572

Helper: Parse dot notation key into prefix and field name

// Helper: Parse dot notation key into prefix and field name
static std::pair<std::string, std::string> parse_key_spec(const std::string & key) {
    auto dot_pos = key.find('.');
    if (dot_pos == std::string::npos) {
        return {"", key};  // Top-level field
    }
    return {key.substr(0, dot_pos), key.substr(dot_pos + 1)};
}

// Mode 1: function_is_key — parse {"function_name": {...}}
common_peg_parser common_chat_peg_builder::build_json_tools_function_is_key(