diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_project_history.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_project_history.rs
index f4c19615a..31cf94aba 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_project_history.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_project_history.rs
@@ -72,10 +72,41 @@ pub(crate) fn append_direct_project_history_item_at(
     let path = history_path(root);
     let lock = project_append_lock_for(&path)?;
     let _append_guard = lock.lock("DirectProject 历史追加写")?;
+    if let Some(item_id) = item.get("id").and_then(Value::as_str) {
+        if read_direct_project_history_items_at(root)?.iter().any(|existing| {
+            existing.get("id").and_then(Value::as_str) == Some(item_id)
+        }) {
+            return Ok(());
+        }
+    }
     let line = record(item)?;
     append_jsonl_line_unlocked(&path, &line, "DirectProject 历史")
 }
 
+pub(crate) fn direct_project_local_message_item(
+    role: &str,
+    content: &str,
+    message_id: Option<&str>,
+) -> Result<Value, String> {
+    let role = role.trim();
+    let content = content.trim();
+    if content.is_empty() || !matches!(role, "user" | "assistant") {
+        return Err("DirectProject 只接受非空 user/assistant 历史消息".to_string());
+    }
+    let mut item = serde_json::json!({
+        "type": "message",
+        "role": role,
+        "content": [{
+            "type": if role == "user" { "input_text" } else { "output_text" },
+            "text": content,
+        }],
+    });
+    if let Some(message_id) = message_id.map(str::trim).filter(|value| !value.is_empty()) {
+        item["id"] = Value::String(message_id.to_string());
+    }
+    Ok(item)
+}
+
 pub(crate) fn direct_project_user_message_item(prompt: &str) -> Value {
     serde_json::json!({
         "type": "message",
@@ -133,3 +164,47 @@ pub(crate) fn read_direct_project_history_items_at(
     }
     Ok(items)
 }
+
+pub(crate) fn read_direct_project_chat_history_at(
+    root: &Path,
+) -> Result<LocalConversationResult, String> {
+    let path = history_path(root);
+    let items = read_direct_project_history_items_at(root)?;
+    let messages = items
+        .into_iter()
+        .filter_map(|item| {
+            let role = item.get("role").and_then(Value::as_str)?;
+            if !matches!(role, "user" | "assistant") {
+                return None;
+            }
+            let content = item
+                .get("content")
+                .and_then(Value::as_array)
+                .map(|parts| {
+                    parts
+                        .iter()
+                        .filter_map(|part| part.get("text").and_then(Value::as_str))
+                        .collect::<Vec<_>>()
+                        .join("")
+                })
+                .unwrap_or_default();
+            (!content.is_empty()).then(|| LocalConversationMessageRecord {
+                schema_version: "agc-direct-project-context.v1".to_string(),
+                role: role.to_string(),
+                content,
+                agent_id: None,
+                message_id: item
+                    .get("id")
+                    .and_then(Value::as_str)
+                    .map(str::to_string),
+                updated_at: 0,
+            })
+        })
+        .collect();
+    Ok(LocalConversationResult {
+        path: path.to_string_lossy().into_owned(),
+        agent_id: None,
+        session_id: None,
+        messages,
+    })
+}
diff --git a/apps/ai-game-creator-shell/src-tauri/src/commands.rs b/apps/ai-game-creator-shell/src-tauri/src/commands.rs
index 99eeb1fa9..aef229a17 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/commands.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/commands.rs
@@ -1,4 +1,5 @@
 use super::*;
+use crate::agent::read_direct_project_chat_history_at;
 use crate::ui_editor::resource::font::FontAsset;
 use sha2::{Digest, Sha256};
 use std::collections::{BTreeMap, HashSet};
@@ -4707,6 +4708,9 @@ pub(crate) fn read_local_conversation(
 ) -> Result<LocalConversationResult, String> {
     let root = Path::new(project_path.trim());
     enforce_project_permission_policy(root, "conversation.read")?;
+    if agent_id.is_none() && session_id.is_none() {
+        return read_direct_project_chat_history_at(root);
+    }
     read_local_conversation_for_session_at(root, agent_id.as_deref(), session_id.as_deref())
 }
 
@@ -4720,6 +4724,15 @@ pub(crate) fn append_local_conversation_message(
 ) -> Result<LocalConversationResult, String> {
     let root = Path::new(project_path.trim());
     enforce_project_permission_policy(root, "conversation.write")?;
+    if agent_id.is_none() && session_id.is_none() {
+        let item = direct_project_local_message_item(
+            &message.role,
+            &message.content,
+            message_id.as_deref(),
+        )?;
+        append_direct_project_history_item_at(root, &item)?;
+        return read_direct_project_chat_history_at(root);
+    }
     let _lock = acquire_project_write_lock(root, "conversation.write")?;
     match message_id.as_deref() {
         Some(message_id) => append_local_conversation_message_for_session_idempotent_at(