text message process works

src/type.jl

@@ -4,8 +4,8 @@
            messageContent, agentMessage, agent,
            # Model types
            modelCost, llmModel, llmUsage,
-           # Message content types
-           textContent, imageContent,
+            # Message content types
+            textContent, imageContent, reasoningContent,
             # Message types
             userMessage, assistantMessageToolCall, assistantMessage, toolResultMessage,
             # Tool types
@@ -31,6 +31,13 @@ using GeneralUtils
 
 const Timestamp = DateTime
 
+struct agentToolCall               # A tool invocation from the LLM
+  type::String                              # Always "function"
+  id::String                                # Unique tool call identifier
+  name::String                              # Tool name
+  arguments::Dict{String, Any}              # Parsed tool arguments
+end
+
 # ------------------------------------------------------------------------------------------------ #
 #                                          LLM model info                                          #
 # ------------------------------------------------------------------------------------------------ #
@@ -75,6 +82,10 @@ struct imageContent <: messageContent         # Image message content
     mimeType::String                          # MIME type (e.g., "image/png")
 end
 
+struct reasoningContent <: messageContent    # LLM reasoning/thinking content
+    text::String                              # The reasoning text
+end
+
 
 # ------------------------------------------------------------------------------------------------ #
 #                                           Message types                                          #
@@ -404,14 +415,6 @@ function agentState(
 end
 
 
-struct agentToolCall               # A tool invocation from the LLM
-    type::String                              # Always "function"
-    id::String                                # Unique tool call identifier
-    name::String                              # Tool name
-    arguments::Dict{String, Any}              # Parsed tool arguments
-end
-
-
 """
 Context for preparing the next conversation turn.