diff --git a/src/agent/loop_.rs b/src/agent/loop_.rs
index a59b055..e191aff 100644
--- a/src/agent/loop_.rs
+++ b/src/agent/loop_.rs
@@ -26,6 +26,10 @@ const STREAM_CHUNK_MIN_CHARS: usize = 80;
 /// Used as a safe fallback when `max_tool_iterations` is unset or configured as zero.
 const DEFAULT_MAX_TOOL_ITERATIONS: usize = 10;
 
+/// Minimum user-message length (in chars) for auto-save to memory.
+/// Matches the channel-side constant in `channels/mod.rs`.
+const AUTOSAVE_MIN_MESSAGE_CHARS: usize = 20;
+
 static SENSITIVE_KEY_PATTERNS: LazyLock<RegexSet> = LazyLock::new(|| {
     RegexSet::new([
         r"(?i)token",
@@ -1475,8 +1479,8 @@ pub async fn run(
     let mut final_output = String::new();
 
     if let Some(msg) = message {
-        // Auto-save user message to memory
-        if config.memory.auto_save {
+        // Auto-save user message to memory (skip short/trivial messages)
+        if config.memory.auto_save && msg.chars().count() >= AUTOSAVE_MIN_MESSAGE_CHARS {
             let user_key = autosave_memory_key("user_msg");
             let _ = mem
                 .store(&user_key, &msg, MemoryCategory::Conversation, None)
@@ -1597,8 +1601,10 @@ pub async fn run(
                 _ => {}
             }
 
-            // Auto-save conversation turns
-            if config.memory.auto_save {
+            // Auto-save conversation turns (skip short/trivial messages)
+            if config.memory.auto_save
+                && user_input.chars().count() >= AUTOSAVE_MIN_MESSAGE_CHARS
+            {
                 let user_key = autosave_memory_key("user_msg");
                 let _ = mem
                     .store(&user_key, &user_input, MemoryCategory::Conversation, None)
diff --git a/src/channels/mod.rs b/src/channels/mod.rs
index c01e47c..537fd0c 100644
--- a/src/channels/mod.rs
+++ b/src/channels/mod.rs
@@ -81,6 +81,10 @@ use tokio_util::sync::CancellationToken;
 type ConversationHistoryMap = Arc<Mutex<HashMap<String, Vec<ChatMessage>>>>;
 /// Maximum history messages to keep per sender.
 const MAX_CHANNEL_HISTORY: usize = 50;
+/// Minimum user-message length (in chars) for auto-save to memory.
+/// Messages shorter than this (e.g. "ok", "thanks") are not stored,
+/// reducing noise in memory recall.
+const AUTOSAVE_MIN_MESSAGE_CHARS: usize = 20;
 
 /// Maximum characters per injected workspace file (matches `OpenClaw` default).
 const BOOTSTRAP_MAX_CHARS: usize = 20_000;
@@ -808,7 +812,7 @@ async fn process_channel_message(
     let memory_context =
         build_memory_context(ctx.memory.as_ref(), &msg.content, ctx.min_relevance_score).await;
 
-    if ctx.auto_save_memory {
+    if ctx.auto_save_memory && msg.content.chars().count() >= AUTOSAVE_MIN_MESSAGE_CHARS {
         let autosave_key = conversation_memory_key(&msg);
         let _ = ctx
             .memory