diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 31b5b2e81..8136d39f6 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -9,7 +9,10 @@
       "Bash(findstr LISTENING)",
       "Bash(npx tsc:*)",
       "Bash(lsof -ti:8081)",
-      "Bash(curl -s http://localhost:8081/health)"
+      "Bash(curl -s http://localhost:8081/health)",
+      "Bash(npm -v)",
+      "Bash(cargo --version)",
+      "Bash(rustc --version)"
     ]
   }
 }
diff --git a/.gitignore b/.gitignore
index b28197188..633a781d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,7 @@ temp*build*/
 /apps/ai-game-creator-shell/src-tauri/gen/
 /apps/ai-game-creator-shell/src-tauri/logs/
 /apps/ai-game-creator-shell/logs/
+/apps/ai-game-creator-shell/.llm-drafts/
 /apps/mobile-shell/.expo/
 /apps/mobile-shell/.expo-export-smoke/
 /server-rs/.spacetimedb/
@@ -54,6 +55,7 @@ temp*build*/
 .worktrees/
 .rag/
 .env.secrets.local
+.claude/settings.local.json
 spacetime.local.json
 deploy/container/api-server.env
 deploy/container/worker-smoke/
diff --git a/apps/ai-game-creator-shell/src-tauri/src/debug.rs b/apps/ai-game-creator-shell/src-tauri/src/debug.rs
new file mode 100644
index 000000000..8172834ff
--- /dev/null
+++ b/apps/ai-game-creator-shell/src-tauri/src/debug.rs
@@ -0,0 +1,3 @@
+pub(crate) mod debug_drafts;
+
+pub(crate) use debug_drafts::*;
\ No newline at end of file
diff --git a/apps/ai-game-creator-shell/src-tauri/src/debug/debug_drafts.rs b/apps/ai-game-creator-shell/src-tauri/src/debug/debug_drafts.rs
new file mode 100644
index 000000000..8e0d606a3
--- /dev/null
+++ b/apps/ai-game-creator-shell/src-tauri/src/debug/debug_drafts.rs
@@ -0,0 +1,100 @@
+//! 调试落盘：保存 LLM 原始输出 / 失败输入，便于排查截断、空返回等问题。
+//!
+//! 本模块用 `#[cfg(all(debug_assertions, not(test)))]` 声明——仅在开发（debug）
+//! 且非测试构建中编入二进制；生产 release 与 cargo test 下整个模块与其调用处一并被剔除，
+//! 不会往仓库写任何文件。
+
+use std::fs;
+use std::path::PathBuf;
+use crate::unix_millis;
+
+// 找到仓库根（包含 apps/ai-game-creator-shell/src-tauri/Cargo.toml 的目录），
+// 以便把草案落到仓库内而非 tmp 项目目录。
+fn repo_root() -> Option<PathBuf> {
+    let mut roots = Vec::new();
+    if let Ok(cwd) = std::env::current_dir() {
+        roots.push(cwd);
+    }
+    if let Ok(exe) = std::env::current_exe() {
+        if let Some(parent) = exe.parent() {
+            roots.push(parent.to_path_buf());
+        }
+    }
+    for root in roots {
+        for directory in root.ancestors().take(8) {
+            let marker = directory
+                .join("apps")
+                .join("ai-game-creator-shell")
+                .join("src-tauri")
+                .join("Cargo.toml");
+            if marker.is_file() {
+                return Some(directory.to_path_buf());
+            }
+        }
+    }
+    None
+}
+
+// 把生成器原始返回（含被截断、解析失败的内容）保存到仓库 .llm-drafts/，
+// 便于排查 “EOF while parsing a string” 这类输出截断问题。尽力而为，不阻断主流程。
+pub(crate) fn persist_snapshot(raw_content: &str) {
+    let Some(repo_root) = repo_root() else {
+        eprintln!("llm.draft.snapshot.skip: 未能定位仓库根目录");
+        return;
+    };
+    let dir = repo_root
+        .join("apps")
+        .join("ai-game-creator-shell")
+        .join(".llm-drafts");
+    if let Err(error) = fs::create_dir_all(&dir) {
+        eprintln!("llm.draft.snapshot.dir.failed: {}: {error}", dir.display());
+        return;
+    }
+    let path = dir.join(format!("draft-{}.txt", unix_millis()));
+    if let Err(error) = fs::write(&path, raw_content) {
+        eprintln!(
+            "llm.draft.snapshot.write.failed: {}: {error}",
+            path.display()
+        );
+        return;
+    }
+    // 同步更新 latest.txt，方便直接打开最近一次草案。
+    let latest = dir.join("latest.txt");
+    let _ = fs::write(&latest, raw_content);
+    eprintln!("llm.draft.snapshot.saved: {}", path.display());
+}
+
+// LLM 调用失败（例如返回内容为空）时，把本次发送给模型的输入（system + 完整 user prompt）
+// 连同错误信息一起落盘到 .llm-drafts/，便于按同样输入复现与定位。尽力而为，不阻断主流程。
+pub(crate) fn persist_error_input(system_prompt: &str, user_prompt: &str, error: &str) {
+    let Some(repo_root) = repo_root() else {
+        eprintln!("llm.draft.error-input.skip: 未能定位仓库根目录");
+        return;
+    };
+    let dir = repo_root
+        .join("apps")
+        .join("ai-game-creator-shell")
+        .join(".llm-drafts");
+    if let Err(io_error) = fs::create_dir_all(&dir) {
+        eprintln!(
+            "llm.draft.error-input.dir.failed: {}: {io_error}",
+            dir.display()
+        );
+        return;
+    }
+    let body = format!(
+        "# LLM 生成失败输入快照\n\n## 错误\n{error}\n\n## System Prompt\n{system_prompt}\n\n## User Prompt（含用户需求/短长期记忆/spec/agenda/组 brief/findings）\n{user_prompt}\n",
+    );
+    let path = dir.join(format!("error-input-{}.txt", unix_millis()));
+    if let Err(io_error) = fs::write(&path, &body) {
+        eprintln!(
+            "llm.draft.error-input.write.failed: {}: {io_error}",
+            path.display()
+        );
+        return;
+    }
+    // 同步更新 latest-error-input.txt，方便直接打开最近一次失败输入。
+    let latest = dir.join("latest-error-input.txt");
+    let _ = fs::write(&latest, &body);
+    eprintln!("llm.draft.error-input.saved: {}", path.display());
+}
diff --git a/apps/ai-game-creator-shell/src-tauri/src/main.rs b/apps/ai-game-creator-shell/src-tauri/src/main.rs
index 3bcb8784d..d3272f533 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/main.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/main.rs
@@ -34,6 +34,11 @@ use shared_contracts::game_creation_app::{
 use tauri::Emitter;
 use tauri_plugin_opener::OpenerExt;
 
+// 调试落盘模块（保存 LLM 原始输出 / 失败输入，排查截断、空返回等）放在 debug_drafts.rs。
+// 用 #[cfg] 编译期门控：仅开发（debug）且非测试构建编入；生产 release 与 cargo test 下整体剔除。
+#[cfg(all(debug_assertions, not(test)))]
+mod debug;
+
 #[derive(Debug, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 struct InitLocalProjectResult {
@@ -364,7 +369,7 @@ const DEFAULT_GAME_INDEX_HTML: &str = r#"<!doctype html>
 "#;
 
 const DEFAULT_EDITOR_BASE_URL: &str = "http://127.0.0.1:3000";
-const GAME_CREATOR_LLM_MAX_OUTPUT_TOKENS: u32 = 5000;
+const GAME_CREATOR_LLM_MAX_OUTPUT_TOKENS: u32 = 320000;
 const GAME_CREATOR_PLANNER_MAX_OUTPUT_TOKENS: u32 = 900;
 const GAME_CREATOR_LLM_REQUEST_TIMEOUT_MS: u64 = 180_000;
 const GAME_CREATOR_AGENT_LOOP_MAX_PASSES: u8 = 3;
@@ -1465,6 +1470,7 @@ async fn request_llm_game_draft_with_client(
         "",
         "",
         "",
+        None,
     )
     .await
 }
@@ -1632,6 +1638,7 @@ async fn run_game_creator_agent_loop_at(
             &findings_markdown,
             &group_briefs_markdown,
             &read_optional_text(&root.join(&agenda.relative_path))?,
+            progress,
         )
         .await
         {
@@ -1814,23 +1821,61 @@ async fn request_generator_game_draft_with_client(
     findings_markdown: &str,
     group_briefs_markdown: &str,
     agenda_markdown: &str,
+    progress: Option<&AgentProgressEmitter<'_>>,
 ) -> Result<LlmGameDraft, String> {
-    let request = LlmTextRequest::new(vec![
-        LlmMessage::system(game_creator_system_prompt()),
-        LlmMessage::user(game_creator_generator_user_prompt(
-            prompt,
-            short_memory,
-            long_memory,
-            spec_markdown,
-            findings_markdown,
-            group_briefs_markdown,
-            agenda_markdown,
-        )),
-    ])
-    .with_max_tokens(GAME_CREATOR_LLM_MAX_OUTPUT_TOKENS);
-    let response = request_game_creator_llm_text(client, request)
-        .await
-        .map_err(|error| format!("LLM 生成失败：{error}"))?;
+    let system_prompt = game_creator_system_prompt();
+    let user_prompt = game_creator_generator_user_prompt(
+        prompt,
+        short_memory,
+        long_memory,
+        spec_markdown,
+        findings_markdown,
+        group_briefs_markdown,
+        agenda_markdown,
+    );
+    // deepseek-v4-pro 等推理模型偶发返回空 content（HTTP 200、completion_tokens=0，
+    // 参见 DeepSeek-V3 issue #1453）。这类空返回是上游瞬时故障，原样重发通常即可恢复，
+    // 因此仅对 EmptyResponse 最多重试 3 次（含首次共 4 次请求），其它错误不重试。
+    const MAX_EMPTY_RETRIES: u32 = 3;
+    let mut empty_retries = 0u32;
+    let response = loop {
+        let request = LlmTextRequest::new(vec![
+            LlmMessage::system(system_prompt),
+            LlmMessage::user(user_prompt.clone()),
+        ])
+        .with_max_tokens(GAME_CREATOR_LLM_MAX_OUTPUT_TOKENS);
+        match request_game_creator_llm_text(client, request).await {
+            Ok(response) => break response,
+            Err(platform_llm::LlmError::EmptyResponse) if empty_retries < MAX_EMPTY_RETRIES => {
+                empty_retries += 1;
+                eprintln!(
+                    "llm.chat.generator.empty-response 重试 {empty_retries}/{MAX_EMPTY_RETRIES}（上游返回空 content，原样重发）"
+                );
+                // 同步推送到 App 进度面板，便于在界面上看到重试（无需盯命令行）。
+                emit_agent_progress(
+                    progress,
+                    "llm.generator.empty_retry",
+                    &format!(
+                        "Generator 收到空返回（DeepSeek 偶发），正在自动重试 {empty_retries}/{MAX_EMPTY_RETRIES}"
+                    ),
+                );
+                continue;
+            }
+            Err(error) => {
+                // 调用失败（含空返回重试耗尽）时，把本次输入连同错误一并落盘，便于复现定位（仅 debug 构建）。
+                #[cfg(all(debug_assertions, not(test)))]
+                debug::persist_error_input(
+                    system_prompt,
+                    user_prompt.as_str(),
+                    &error.to_string(),
+                );
+                return Err(format!("LLM 生成失败：{error}"));
+            }
+        }
+    };
+    // 先把原始返回落盘，再解析；解析失败（如输出截断）时仍能从仓库里拿到完整原文（仅 debug 构建）。
+    #[cfg(all(debug_assertions, not(test)))]
+    debug::persist_snapshot(response.content.as_str());
     let content = strip_llm_thinking_blocks(response.content.as_str());
     parse_llm_game_draft_response(content.as_str())
 }