修复资产计费边界风险

资产生成预扣费改为 fail-closed，避免钱包异常时继续调用外部生成

新增钱包退款 outbox，退款失败时本地落盘并后台重放

拼图首图后台任务改用 SpacetimeDB claim 表实现跨实例互斥

计费 ledger id 统一绑定 request_id，并让前端重试复用 x-request-id

同步 SpacetimeDB bindings、后端架构文档和 Hermes 决策记录

.hermes/shared-memory/decision-log.md

@@ -1728,3 +1728,11 @@
 - 影响范围：`shared-contracts` 默认 spec、`module-runtime` 入口配置响应、`spacetime-module` 后台保存校验、后台入口开关页摘要和前端 fallback spec。
 - 验证方式：`GET /api/creation-entry/config` 中各玩法 `unifiedCreationSpec.title` 等于已保存契约内容；后台只修改入口名称时不应隐式改写已保存的统一创作页表头。
 - 关联文档：`docs/【玩法创作】平台入口与玩法链路-2026-05-15.md`。
+
+## 2026-06-11 资产计费边界改为 fail-closed 并补偿退款
+
+- 背景：图片 / 资产生成入口曾在钱包或 SpacetimeDB 预扣费连通性异常时允许继续生成，且失败后同步退款如果遇到 SpacetimeDB 短暂不可用缺少本地补偿；拼图首图后台任务还使用 api-server 进程内 HashSet 互斥，多实例下不能防重复。
+- 决策：暂不实现 token 限流。所有资产生成预扣费改为 fail-closed，预扣费失败直接返回错误；支持 retry 的计费 ledger id 统一包含 HTTP `request_id`，前端静默刷新重试复用同一个 `x-request-id`。生成失败后的退款先同步调用 SpacetimeDB，失败则写入 `wallet-refund-outbox` 本地文件并由后台 worker 重放。拼图首图后台生成互斥改为 SpacetimeDB `puzzle_background_compile_task` 表，使用 `task_id + request_id` 作为 claim id，释放时校验 claim id，避免旧任务误删新租约。
+- 影响范围：`api-server` 资产计费包裹、钱包退款补偿、拼图首图后台生成、`spacetime-module` 拼图 task 表、`spacetime-client` bindings/facade、前端 API request id 复用和后端架构文档。
+- 验证方式：`npm run spacetime:generate`、`npm run check:spacetime-schema`、`npm run check:spacetime-runtime-access`、`node scripts/check-server-rs-ddd-boundaries.mjs`、`cargo check -p api-server --manifest-path server-rs/Cargo.toml`、`cargo test -p api-server --manifest-path server-rs/Cargo.toml wallet_refund_outbox`、`cargo test -p api-server --manifest-path server-rs/Cargo.toml asset_operation`、`npm run test -- src/services/apiClient.test.ts`、`npm run check:encoding`。
+- 关联文档：`docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md`。

docs/【后端架构】server-rs与SpacetimeDB数据契约-2026-05-15.md

@@ -190,6 +190,10 @@ npm run check:server-rs-ddd
 1. `creation_entry_type_config.unified_creation_spec_json` 内的 `mudPointCost` 是玩法新建草稿初始生成的泥点成本真相源，同时供入口卡展示和前端余额前置校验使用；旧契约缺失时允许按代码默认成本兜底。
 2. `api-server` 执行拼图首图生成、抓大鹅完整草稿生成和汪汪声浪初始三图生成时，必须通过 `GET /api/creation-entry/config` 同源配置解析对应玩法成本后再调用钱包扣费 procedure，不得继续使用前端或后端硬编码常量作为实际扣费真相。
 3. 结果页单图重生成、发布、道具使用和其它独立资产操作仍按各自业务操作成本执行；不要把初始草稿成本误套到这些单次操作上。
+4. 资产操作的预扣费必须 fail-closed：钱包或 SpacetimeDB 预扣费不可达、超时或返回业务错误时，`api-server` 直接返回错误，不允许继续调用图片、音频、GLB 等外部生成 provider。
+5. 需要支持 HTTP retry 的计费 ledger id 必须包含当前请求的 `request_id`；前端 `fetchWithApiAuth` 同一次业务请求的静默刷新重试复用同一个 `x-request-id`，后端不得再使用 prompt 指纹或随机 asset id 作为扣费幂等键。
+6. 外部生成已预扣费但后续失败时必须先同步调用钱包退款；若 SpacetimeDB 暂不可用，退款请求写入 `wallet-refund-outbox` 本地文件并由后台 worker 重放。默认启用，配置项为 `GENARRATIVE_WALLET_REFUND_OUTBOX_ENABLED`、`GENARRATIVE_WALLET_REFUND_OUTBOX_DIR`、`GENARRATIVE_WALLET_REFUND_OUTBOX_BATCH_SIZE`、`GENARRATIVE_WALLET_REFUND_OUTBOX_FLUSH_INTERVAL_MS` 和 `GENARRATIVE_WALLET_REFUND_OUTBOX_MAX_BYTES`。outbox 文件按 refund ledger id 幂等落盘；成功重放后删除，坏文件隔离为 `corrupt-*`。
+7. 拼图首图后台生成的跨实例互斥锁必须落在 SpacetimeDB `puzzle_background_compile_task` 表，claim id 由 `task_id + request_id` 构成，释放时必须校验 claim id，避免旧后台任务释放新请求抢到的租约。
 
 ## 外部服务与资产
 
@@ -640,6 +644,12 @@ npm run check:server-rs-ddd
 - Rust 结构体：`PuzzleAgentSessionRow`
 - 源码：`server-rs/crates/spacetime-module/src/puzzle.rs`
 
+### `puzzle_background_compile_task`
+
+- Rust 结构体：`PuzzleBackgroundCompileTaskRow`
+- 源码：`server-rs/crates/spacetime-module/src/puzzle.rs`
+- 说明：拼图首图后台生成的跨 api-server 实例互斥 claim 表，只保存活动任务租约，不表达最终生成结果；`task_id` 为主键，`claim_id` 用于释放时防止误删新租约，租约超时时间为 30 分钟。
+
 ### `puzzle_event`
 
 - Rust 结构体：`PuzzleEvent`

server-rs/crates/api-server/src/asset_billing.rs

@@ -4,7 +4,11 @@ use axum::http::StatusCode;
 use serde_json::json;
 use spacetime_client::SpacetimeClientError;
 
-use crate::{http_error::AppError, state::AppState};
+use crate::{
+    http_error::AppError,
+    state::AppState,
+    wallet_refund_outbox::{WalletRefundOutboxEnqueueOutcome, WalletRefundOutboxRecord},
+};
 
 pub(crate) const ASSET_OPERATION_POINTS_COST: u64 = 1;
 
@@ -90,22 +94,11 @@ async fn consume_asset_operation_points(
         .await
     {
         Ok(_) => Ok(true),
-        Err(error) if should_skip_asset_operation_billing_for_connectivity(&error) => {
-            // 中文注释：外部生图不应被 Maincloud 钱包短暂 503 阻断；此时跳过扣费，让业务链路继续，避免用户重复点击。
-            tracing::warn!(
-                owner_user_id,
-                asset_kind,
-                asset_id,
-                error = %error,
-                "资产操作泥点预扣因 SpacetimeDB 连接不可用而降级跳过"
-            );
-            Ok(false)
-        }
         Err(error) => Err(map_asset_operation_wallet_error(error)),
     }
 }
 
-/// 外部生成或发布 mutation 失败后补偿退款；退款失败只记日志，避免覆盖原始业务错误。
+/// 外部生成或发布 mutation 失败后补偿退款；立即退款失败会进入 outbox，避免覆盖原始业务错误。
 async fn refund_asset_operation_points(
     state: &AppState,
     owner_user_id: &str,
@@ -117,22 +110,74 @@ async fn refund_asset_operation_points(
         "asset_operation_refund:{}:{}:{}",
         owner_user_id, asset_kind, asset_id
     );
+    let created_at_micros = current_utc_micros();
     if let Err(error) = state
         .spacetime_client()
         .refund_profile_wallet_points(
             owner_user_id.to_string(),
             points_cost,
-            ledger_id,
-            current_utc_micros(),
+            ledger_id.clone(),
+            created_at_micros,
         )
         .await
     {
+        let refund_error = error.to_string();
+        if let Some(outbox) = state.wallet_refund_outbox() {
+            match outbox
+                .enqueue(WalletRefundOutboxRecord {
+                    owner_user_id: owner_user_id.to_string(),
+                    amount: points_cost,
+                    ledger_id: ledger_id.clone(),
+                    created_at_micros,
+                    asset_kind: asset_kind.to_string(),
+                    asset_id: asset_id.to_string(),
+                })
+                .await
+            {
+                Ok(WalletRefundOutboxEnqueueOutcome::Enqueued) => {
+                    tracing::warn!(
+                        owner_user_id,
+                        asset_kind,
+                        asset_id,
+                        ledger_id,
+                        error = %refund_error,
+                        "资产操作失败后的泥点退款立即执行失败，已写入 wallet refund outbox"
+                    );
+                    return;
+                }
+                Ok(WalletRefundOutboxEnqueueOutcome::Dropped { reason }) => {
                     tracing::error!(
                         owner_user_id,
                         asset_kind,
                         asset_id,
-            error = %error,
-            "资产操作失败后的泥点退款失败"
+                        ledger_id,
+                        reason,
+                        error = %refund_error,
+                        "资产操作失败后的泥点退款立即执行失败，且 wallet refund outbox 因容量限制丢弃"
+                    );
+                    return;
+                }
+                Err(outbox_error) => {
+                    tracing::error!(
+                        owner_user_id,
+                        asset_kind,
+                        asset_id,
+                        ledger_id,
+                        refund_error = %refund_error,
+                        outbox_error = %outbox_error,
+                        "资产操作失败后的泥点退款立即执行失败，且写入 wallet refund outbox 失败"
+                    );
+                    return;
+                }
+            }
+        }
+        tracing::error!(
+            owner_user_id,
+            asset_kind,
+            asset_id,
+            ledger_id,
+            error = %refund_error,
+            "资产操作失败后的泥点退款失败，且 wallet refund outbox 未启用"
         );
     }
 }
@@ -185,7 +230,7 @@ mod tests {
     use super::*;
 
     #[test]
-    fn asset_operation_billing_skips_spacetime_connectivity_errors() {
+    fn asset_operation_connectivity_errors_are_classified_for_non_billing_fallbacks() {
         assert_eq!(ASSET_OPERATION_POINTS_COST, 1);
         assert!(should_skip_asset_operation_billing_for_connectivity(
             &SpacetimeClientError::ConnectDropped

server-rs/crates/api-server/src/bark_battle.rs

@@ -306,11 +306,12 @@ pub async fn generate_bark_battle_image_asset(
         .filter(|value| !value.is_empty())
         .map(ToString::to_string);
     let points_cost = resolve_bark_battle_image_asset_points_cost(&state, &payload).await;
+    let billing_asset_id = request_context.request_id().to_string();
     let result = execute_billable_asset_operation_with_cost(
         &state,
         &owner_user_id,
         bark_battle_slot_asset_kind(&slot),
-        asset_id.as_str(),
+        billing_asset_id.as_str(),
         points_cost,
         async {
             generate_and_persist_bark_battle_image_asset(

server-rs/crates/api-server/src/big_fish.rs

@@ -722,7 +722,7 @@ pub async fn execute_big_fish_action(
         "big_fish_publish_game" => Some("big_fish_publish_game"),
         _ => None,
     };
-    let billing_asset_id = format!("{session_id}:{now}");
+    let billing_asset_id = format!("{}:{}:{}", session_id, action, request_context.request_id());
     let session_operation = async {
         match action.as_str() {
             "big_fish_compile_draft" => {

server-rs/crates/api-server/src/config.rs

@@ -32,6 +32,11 @@ pub struct AppConfig {
     pub tracking_outbox_batch_size: usize,
     pub tracking_outbox_flush_interval: Duration,
     pub tracking_outbox_max_bytes: u64,
+    pub wallet_refund_outbox_enabled: bool,
+    pub wallet_refund_outbox_dir: PathBuf,
+    pub wallet_refund_outbox_batch_size: usize,
+    pub wallet_refund_outbox_flush_interval: Duration,
+    pub wallet_refund_outbox_max_bytes: u64,
     pub log_filter: String,
     pub otel_enabled: bool,
     pub admin_username: Option<String>,
@@ -183,6 +188,11 @@ impl Default for AppConfig {
             tracking_outbox_batch_size: 500,
             tracking_outbox_flush_interval: Duration::from_millis(1_000),
             tracking_outbox_max_bytes: 256 * 1024 * 1024,
+            wallet_refund_outbox_enabled: true,
+            wallet_refund_outbox_dir: PathBuf::from("server-rs/.data/wallet-refund-outbox"),
+            wallet_refund_outbox_batch_size: 100,
+            wallet_refund_outbox_flush_interval: Duration::from_millis(1_000),
+            wallet_refund_outbox_max_bytes: 64 * 1024 * 1024,
             log_filter: "info,tower_http=info".to_string(),
             otel_enabled: false,
             admin_username: None,
@@ -409,6 +419,27 @@ impl AppConfig {
         {
             config.tracking_outbox_max_bytes = max_bytes;
         }
+        if let Some(enabled) = read_first_bool_env(&["GENARRATIVE_WALLET_REFUND_OUTBOX_ENABLED"]) {
+            config.wallet_refund_outbox_enabled = enabled;
+        }
+        if let Some(dir) = read_first_non_empty_env(&["GENARRATIVE_WALLET_REFUND_OUTBOX_DIR"]) {
+            config.wallet_refund_outbox_dir = PathBuf::from(dir);
+        }
+        if let Some(batch_size) =
+            read_first_usize_env(&["GENARRATIVE_WALLET_REFUND_OUTBOX_BATCH_SIZE"])
+        {
+            config.wallet_refund_outbox_batch_size = batch_size;
+        }
+        if let Some(flush_interval_ms) =
+            read_first_positive_u64_env(&["GENARRATIVE_WALLET_REFUND_OUTBOX_FLUSH_INTERVAL_MS"])
+        {
+            config.wallet_refund_outbox_flush_interval = Duration::from_millis(flush_interval_ms);
+        }
+        if let Some(max_bytes) =
+            read_first_positive_u64_env(&["GENARRATIVE_WALLET_REFUND_OUTBOX_MAX_BYTES"])
+        {
+            config.wallet_refund_outbox_max_bytes = max_bytes;
+        }
         if let Some(otel_enabled) = read_first_bool_env(&["GENARRATIVE_OTEL_ENABLED"]) {
             config.otel_enabled = otel_enabled;
         }
@@ -1380,6 +1411,11 @@ mod tests {
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_BATCH_SIZE");
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_FLUSH_INTERVAL_MS");
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_MAX_BYTES");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_ENABLED");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_DIR");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_BATCH_SIZE");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_FLUSH_INTERVAL_MS");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_MAX_BYTES");
             std::env::remove_var("GENARRATIVE_OTEL_ENABLED");
             std::env::set_var("GENARRATIVE_API_LISTEN_BACKLOG", "2048");
             std::env::set_var("GENARRATIVE_API_WORKER_THREADS", "6");
@@ -1396,6 +1432,14 @@ mod tests {
             std::env::set_var("GENARRATIVE_TRACKING_OUTBOX_BATCH_SIZE", "250");
             std::env::set_var("GENARRATIVE_TRACKING_OUTBOX_FLUSH_INTERVAL_MS", "2000");
             std::env::set_var("GENARRATIVE_TRACKING_OUTBOX_MAX_BYTES", "1048576");
+            std::env::set_var("GENARRATIVE_WALLET_REFUND_OUTBOX_ENABLED", "false");
+            std::env::set_var(
+                "GENARRATIVE_WALLET_REFUND_OUTBOX_DIR",
+                "/tmp/genarrative-wallet-refund-outbox",
+            );
+            std::env::set_var("GENARRATIVE_WALLET_REFUND_OUTBOX_BATCH_SIZE", "50");
+            std::env::set_var("GENARRATIVE_WALLET_REFUND_OUTBOX_FLUSH_INTERVAL_MS", "3000");
+            std::env::set_var("GENARRATIVE_WALLET_REFUND_OUTBOX_MAX_BYTES", "524288");
             std::env::set_var("GENARRATIVE_OTEL_ENABLED", "true");
         }
 
@@ -1421,6 +1465,17 @@ mod tests {
             std::time::Duration::from_millis(2_000)
         );
         assert_eq!(config.tracking_outbox_max_bytes, 1_048_576);
+        assert!(!config.wallet_refund_outbox_enabled);
+        assert_eq!(
+            config.wallet_refund_outbox_dir,
+            std::path::PathBuf::from("/tmp/genarrative-wallet-refund-outbox")
+        );
+        assert_eq!(config.wallet_refund_outbox_batch_size, 50);
+        assert_eq!(
+            config.wallet_refund_outbox_flush_interval,
+            std::time::Duration::from_millis(3_000)
+        );
+        assert_eq!(config.wallet_refund_outbox_max_bytes, 524_288);
         assert!(config.otel_enabled);
 
         unsafe {
@@ -1436,6 +1491,11 @@ mod tests {
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_BATCH_SIZE");
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_FLUSH_INTERVAL_MS");
             std::env::remove_var("GENARRATIVE_TRACKING_OUTBOX_MAX_BYTES");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_ENABLED");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_DIR");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_BATCH_SIZE");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_FLUSH_INTERVAL_MS");
+            std::env::remove_var("GENARRATIVE_WALLET_REFUND_OUTBOX_MAX_BYTES");
             std::env::remove_var("GENARRATIVE_OTEL_ENABLED");
         }
     }

server-rs/crates/api-server/src/custom_world_ai.rs

@@ -547,11 +547,12 @@ pub async fn generate_custom_world_scene_image(
     require_openai_image_settings(&state)
         .map_err(|error| custom_world_ai_error_response(&request_context, error))?;
     let asset_id = format!("custom-scene-{}", current_utc_millis());
+    let billing_asset_id = request_context.request_id().to_string();
     let asset = execute_billable_asset_operation(
         &state,
         &owner_user_id,
         "scene_image",
-        asset_id.as_str(),
+        billing_asset_id.as_str(),
         async {
             let settings = require_openai_image_settings(&state)?.with_external_api_audit_context(
                 &request_context,
@@ -806,11 +807,12 @@ pub async fn generate_custom_world_cover_image(
     require_dashscope_settings(&state)
         .map_err(|error| custom_world_ai_error_response(&request_context, error))?;
     let asset_id = format!("custom-cover-{}", current_utc_millis());
+    let billing_asset_id = request_context.request_id().to_string();
     let asset = execute_billable_asset_operation(
         &state,
         &owner_user_id,
         "custom_world_cover",
-        asset_id.as_str(),
+        billing_asset_id.as_str(),
         async {
             let settings = require_dashscope_settings(&state)?;
             let http_client = build_dashscope_http_client(&settings)?;
@@ -1011,11 +1013,12 @@ pub async fn generate_custom_world_opening_cg(
         .map_err(|error| custom_world_ai_error_response(&request_context, error))?;
 
     let opening_cg_id = normalized.opening_cg_id.clone();
+    let billing_asset_id = request_context.request_id().to_string();
     let generated = execute_billable_asset_operation_with_cost(
         &state,
         &owner_user_id,
         "custom_world_opening_cg",
-        opening_cg_id.as_str(),
+        billing_asset_id.as_str(),
         OPENING_CG_POINTS_COST,
         async {
             let image_settings = require_openai_image_settings(&state)?

server-rs/crates/api-server/src/main.rs

@@ -89,6 +89,7 @@ mod tracking_outbox;
 mod vector_engine_audio_generation;
 mod visual_novel;
 mod volcengine_speech;
+mod wallet_refund_outbox;
 mod wechat;
 mod wooden_fish;
 mod work_author;
@@ -115,6 +116,7 @@ use crate::{
     config::AppConfig,
     state::{AppState, AppStateInitError},
     tracking_outbox::TrackingOutbox,
+    wallet_refund_outbox::WalletRefundOutbox,
 };
 
 const API_SERVER_STARTUP_STACK_SIZE_BYTES: usize = 32 * 1024 * 1024;
@@ -125,6 +127,7 @@ const AUTH_STORE_STARTUP_RETRY_INTERVAL: Duration = Duration::from_secs(5);
 struct ShutdownContext {
     app_state: Option<AppState>,
     tracking_outbox: Option<Arc<TrackingOutbox>>,
+    wallet_refund_outbox: Option<Arc<WalletRefundOutbox>>,
     outbox_flush_timeout: Duration,
 }
 
@@ -178,11 +181,16 @@ async fn run_server(config: AppConfig) -> Result<(), io::Error> {
             if let Some(outbox) = tracking_outbox.clone() {
                 outbox.spawn_worker();
             }
+            let wallet_refund_outbox = state.wallet_refund_outbox();
+            if let Some(outbox) = wallet_refund_outbox.clone() {
+                outbox.spawn_worker();
+            }
             (
                 build_router(state.clone()),
                 ShutdownContext {
                     app_state: Some(state),
                     tracking_outbox,
+                    wallet_refund_outbox,
                     outbox_flush_timeout,
                 },
             )
@@ -192,6 +200,7 @@ async fn run_server(config: AppConfig) -> Result<(), io::Error> {
             ShutdownContext {
                 app_state: None,
                 tracking_outbox: None,
+                wallet_refund_outbox: None,
                 outbox_flush_timeout,
             },
         ),
@@ -271,12 +280,8 @@ async fn finalize_shutdown(context: ShutdownContext) {
         state.mark_not_ready();
     }
 
-    let Some(outbox) = context.tracking_outbox else {
-        return;
-    };
-
     if context.outbox_flush_timeout.is_zero() {
-        warn!("api-server 退出时 tracking outbox flush timeout 为 0，跳过主动 flush");
+        warn!("api-server 退出时 outbox flush timeout 为 0，跳过主动 flush");
         return;
     }
 
@@ -284,6 +289,7 @@ async fn finalize_shutdown(context: ShutdownContext) {
         .outbox_flush_timeout
         .as_millis()
         .min(u128::from(u64::MAX)) as u64;
+    if let Some(outbox) = context.tracking_outbox {
         info!(timeout_ms, "api-server 退出前封存并 flush tracking outbox");
         match timeout(context.outbox_flush_timeout, outbox.flush_for_shutdown()).await {
             Ok(Ok(())) => {
@@ -304,6 +310,28 @@ async fn finalize_shutdown(context: ShutdownContext) {
         }
     }
 
+    if let Some(outbox) = context.wallet_refund_outbox {
+        info!(timeout_ms, "api-server 退出前 flush wallet refund outbox");
+        match timeout(context.outbox_flush_timeout, outbox.flush_for_shutdown()).await {
+            Ok(Ok(())) => {
+                info!("api-server 退出前 wallet refund outbox flush 完成");
+            }
+            Ok(Err(error)) => {
+                warn!(
+                    error = %error,
+                    "api-server 退出前 wallet refund outbox flush 未完成，已保留本地文件等待下次启动重试"
+                );
+            }
+            Err(_) => {
+                warn!(
+                    timeout_ms,
+                    "api-server 退出前 wallet refund outbox flush 超时，已保留本地文件等待下次启动重试"
+                );
+            }
+        }
+    }
+}
+
 fn build_tcp_listener(
     bind_address: SocketAddr,
     listen_backlog: i32,

server-rs/crates/api-server/src/match3d.rs

@@ -1,4 +1,4 @@
-use std::{
+use std::{
     collections::BTreeMap,
     convert::Infallible,
     future::Future,
@@ -65,10 +65,7 @@ use spacetime_client::{
 
 use crate::{
     api_response::json_success_body,
-    asset_billing::{
-        execute_billable_asset_operation_with_cost, map_asset_operation_wallet_error,
-        should_skip_asset_operation_billing_for_connectivity,
-    },
+    asset_billing::{execute_billable_asset_operation_with_cost, map_asset_operation_wallet_error},
     auth::{AuthenticatedAccessToken, RuntimePrincipal},
     config::AppConfig,
     generated_asset_sheets::apply_generated_asset_sheet_green_screen_alpha,
@@ -354,13 +351,6 @@ impl Match3DItemAssetsGenerationPlan {
             Self::Replace(plan) => plan.requested_item_names.len(),
         }
     }
-
-    fn billing_fingerprint_source(&self) -> String {
-        match self {
-            Self::Append(plan) => format!("append:{}", plan.requested_item_names.join("|")),
-            Self::Replace(plan) => format!("replace:{}", plan.requested_item_names.join("|")),
-        }
-    }
 }
 
 fn serialize_match3d_generated_item_assets(assets: &[Match3DGeneratedItemAsset]) -> Option<String> {

server-rs/crates/api-server/src/match3d/draft.rs

@@ -162,7 +162,12 @@ pub(super) async fn compile_match3d_draft_for_session(
     let initial_tags = requested_tags
         .clone()
         .unwrap_or_else(|| fallback_work_metadata.tags.clone());
-    let billing_asset_id = format!("{}:{}:{}", session_id, profile_id, current_utc_micros());
+    let billing_asset_id = format!(
+        "{}:{}:{}",
+        session_id,
+        profile_id,
+        request_context.request_id()
+    );
     let points_cost = crate::creation_entry_config::resolve_creation_entry_mud_point_cost(
         state,
         "match3d",
@@ -514,15 +519,6 @@ async fn consume_match3d_draft_generation_points(
         .await
     {
         Ok(_) => Ok(true),
-        Err(error) if should_skip_asset_operation_billing_for_connectivity(&error) => {
-            tracing::warn!(
-                owner_user_id,
-                billing_asset_id,
-                error = %error,
-                "抓大鹅草稿泥点预扣因 SpacetimeDB 连接不可用而降级跳过"
-            );
-            Ok(false)
-        }
         Err(error) => Err(match3d_error_response(
             request_context,
             MATCH3D_AGENT_PROVIDER,

server-rs/crates/api-server/src/match3d/handlers.rs

@@ -751,7 +751,6 @@ pub async fn generate_match3d_background_image_for_work(
     )?;
     let prompt = normalize_match3d_background_prompt(payload.prompt.as_str());
     ensure_non_empty(&request_context, MATCH3D_WORKS_PROVIDER, &prompt, "prompt")?;
-    let prompt_fingerprint = build_match3d_prompt_fingerprint(prompt.as_str());
 
     let context =
         load_match3d_work_asset_context(&state, &request_context, &authenticated, &profile_id)
@@ -763,7 +762,12 @@ pub async fn generate_match3d_background_image_for_work(
         config,
         assets,
     } = context;
-    let billing_asset_id = format!("{}:{}:{}", session_id, profile_id, prompt_fingerprint);
+    let billing_asset_id = format!(
+        "{}:{}:{}",
+        session_id,
+        profile_id,
+        request_context.request_id()
+    );
     let (generated_background, generated_assets) = execute_billable_asset_operation_with_cost(
         &state,
         owner_user_id.as_str(),
@@ -860,7 +864,6 @@ pub async fn generate_match3d_container_image_for_work(
     )?;
     let prompt = normalize_match3d_background_prompt(payload.prompt.as_str());
     ensure_non_empty(&request_context, MATCH3D_WORKS_PROVIDER, &prompt, "prompt")?;
-    let prompt_fingerprint = build_match3d_prompt_fingerprint(prompt.as_str());
 
     let context =
         load_match3d_work_asset_context(&state, &request_context, &authenticated, &profile_id)
@@ -874,7 +877,9 @@ pub async fn generate_match3d_container_image_for_work(
     } = context;
     let billing_asset_id = format!(
         "{}:{}:{}:container",
-        session_id, profile_id, prompt_fingerprint
+        session_id,
+        profile_id,
+        request_context.request_id()
     );
     let (generated_background, generated_assets) = execute_billable_asset_operation_with_cost(
         &state,
@@ -1017,7 +1022,7 @@ pub async fn generate_match3d_item_assets_for_work(
         session_id,
         profile_id,
         billed_item_count,
-        build_match3d_prompt_fingerprint(generation_plan.billing_fingerprint_source().as_str())
+        request_context.request_id()
     );
     let generated_assets = execute_billable_asset_operation_with_cost(
         &state,

server-rs/crates/api-server/src/match3d/item_assets.rs

@@ -1208,14 +1208,6 @@ pub(super) fn normalize_match3d_background_prompt(raw: &str) -> String {
         .to_string()
 }
 
-pub(super) fn build_match3d_prompt_fingerprint(value: &str) -> String {
-    let mut hash = 0u32;
-    for character in value.chars() {
-        hash = hash.wrapping_mul(31).wrapping_add(character as u32);
-    }
-    format!("{hash:08x}")
-}
-
 pub(super) fn build_fallback_match3d_background_prompt(config: &Match3DConfigJson) -> String {
     let theme = config.theme_text.trim();
     let normalized_theme = if theme.is_empty() { "抓大鹅" } else { theme };

server-rs/crates/api-server/src/puzzle.rs

@@ -1,6 +1,5 @@
 use std::{
-    collections::{BTreeMap, HashSet},
-    sync::{Mutex, OnceLock},
+    collections::BTreeMap,
     time::{Instant, SystemTime, UNIX_EPOCH},
 };
 
@@ -56,17 +55,19 @@ use spacetime_client::{
     PuzzleAgentMessageRecord, PuzzleAgentMessageSubmitRecordInput,
     PuzzleAgentSessionCreateRecordInput, PuzzleAgentSessionRecord,
     PuzzleAgentSuggestedActionRecord, PuzzleAnchorItemRecord, PuzzleAnchorPackRecord,
-    PuzzleAudioAssetRecord, PuzzleCreatorIntentRecord, PuzzleDraftCompileFailureRecordInput,
-    PuzzleDraftLevelRecord, PuzzleFormDraftRecord, PuzzleFormDraftSaveRecordInput,
-    PuzzleGeneratedImageCandidateRecord, PuzzleGeneratedImagesSaveRecordInput,
-    PuzzleLeaderboardEntryRecord, PuzzleLeaderboardSubmitRecordInput, PuzzlePublishRecordInput,
-    PuzzleRecommendedNextWorkRecord, PuzzleResultDraftRecord, PuzzleResultPreviewBlockerRecord,
-    PuzzleResultPreviewFindingRecord, PuzzleResultPreviewRecord, PuzzleRunDragRecordInput,
-    PuzzleRunPauseRecordInput, PuzzleRunPropRecordInput, PuzzleRunRecord,
-    PuzzleRunStartRecordInput, PuzzleRunSwapRecordInput, PuzzleSelectCoverImageRecordInput,
-    PuzzleUiBackgroundSaveRecordInput, PuzzleWorkLikeReportRecordInput,
-    PuzzleWorkPointIncentiveClaimRecordInput, PuzzleWorkProfileRecord, PuzzleWorkRemixRecordInput,
-    PuzzleWorkUpsertRecordInput, SpacetimeClientError,
+    PuzzleAudioAssetRecord, PuzzleBackgroundCompileTaskClaimRecordInput,
+    PuzzleBackgroundCompileTaskReleaseRecordInput, PuzzleCreatorIntentRecord,
+    PuzzleDraftCompileFailureRecordInput, PuzzleDraftLevelRecord, PuzzleFormDraftRecord,
+    PuzzleFormDraftSaveRecordInput, PuzzleGeneratedImageCandidateRecord,
+    PuzzleGeneratedImagesSaveRecordInput, PuzzleLeaderboardEntryRecord,
+    PuzzleLeaderboardSubmitRecordInput, PuzzlePublishRecordInput, PuzzleRecommendedNextWorkRecord,
+    PuzzleResultDraftRecord, PuzzleResultPreviewBlockerRecord, PuzzleResultPreviewFindingRecord,
+    PuzzleResultPreviewRecord, PuzzleRunDragRecordInput, PuzzleRunPauseRecordInput,
+    PuzzleRunPropRecordInput, PuzzleRunRecord, PuzzleRunStartRecordInput, PuzzleRunSwapRecordInput,
+    PuzzleSelectCoverImageRecordInput, PuzzleUiBackgroundSaveRecordInput,
+    PuzzleWorkLikeReportRecordInput, PuzzleWorkPointIncentiveClaimRecordInput,
+    PuzzleWorkProfileRecord, PuzzleWorkRemixRecordInput, PuzzleWorkUpsertRecordInput,
+    SpacetimeClientError,
 };
 use std::convert::Infallible;
 
@@ -134,38 +135,51 @@ const PUZZLE_UI_BACKGROUND_PROMPT_FALLBACK_MARKER: &str =
 const PUZZLE_VECTOR_ENGINE_SQUARE_IMAGE_SIZE: &str = "1024x1024";
 const PUZZLE_VECTOR_ENGINE_PORTRAIT_IMAGE_SIZE: &str = "1024x1536";
 
-static PUZZLE_BACKGROUND_COMPILE_TASKS: OnceLock<Mutex<HashSet<String>>> = OnceLock::new();
-
-fn puzzle_background_compile_tasks() -> &'static Mutex<HashSet<String>> {
-    PUZZLE_BACKGROUND_COMPILE_TASKS.get_or_init(|| Mutex::new(HashSet::new()))
+fn build_puzzle_background_compile_task_id(session_id: &str) -> String {
+    format!("puzzle_initial_background:{session_id}")
 }
 
-fn try_register_puzzle_background_compile_task(session_id: &str) -> bool {
-    match puzzle_background_compile_tasks().lock() {
-        Ok(mut tasks) => tasks.insert(session_id.to_string()),
-        Err(error) => {
+fn build_puzzle_background_compile_claim_id(task_id: &str, request_id: &str) -> String {
+    format!("{task_id}:{request_id}")
+}
+
+async fn release_claimed_puzzle_background_compile_task(
+    state: &PuzzleApiState,
+    task_id: &str,
+    claim_id: &str,
+    session_id: &str,
+    owner_user_id: &str,
+) {
+    let result = state
+        .spacetime_client()
+        .release_puzzle_background_compile_task(PuzzleBackgroundCompileTaskReleaseRecordInput {
+            task_id: task_id.to_string(),
+            claim_id: claim_id.to_string(),
+            session_id: session_id.to_string(),
+            owner_user_id: owner_user_id.to_string(),
+        })
+        .await;
+    match result {
+        Ok(true) => {}
+        Ok(false) => {
             tracing::warn!(
                 provider = PUZZLE_AGENT_API_BASE_PROVIDER,
+                task_id,
+                claim_id,
                 session_id,
-                error = %error,
-                "拼图后台生成任务注册表锁已损坏，允许本次任务继续"
+                owner_user_id,
+                "拼图首图后台生成任务释放未命中当前 claim"
             );
-            true
-        }
-    }
-}
-
-fn unregister_puzzle_background_compile_task(session_id: &str) {
-    match puzzle_background_compile_tasks().lock() {
-        Ok(mut tasks) => {
-            tasks.remove(session_id);
         }
         Err(error) => {
             tracing::warn!(
                 provider = PUZZLE_AGENT_API_BASE_PROVIDER,
+                task_id,
+                claim_id,
                 session_id,
+                owner_user_id,
                 error = %error,
-                "拼图后台生成任务注册表解锁失败，忽略清理"
+                "拼图首图后台生成任务释放失败"
             );
         }
     }

server-rs/crates/api-server/src/puzzle/handlers.rs

@@ -588,7 +588,7 @@ pub async fn execute_puzzle_agent_action(
     let owner_user_id = authenticated.claims().user_id().to_string();
     let now = current_utc_micros();
     let action = payload.action.trim().to_string();
-    let billing_asset_id = format!("{session_id}:{now}");
+    let billing_asset_id = format!("{}:{}:{}", session_id, action, request_context.request_id());
     let mut operation_consumed_points = 0;
     tracing::info!(
         provider = PUZZLE_AGENT_API_BASE_PROVIDER,
@@ -695,20 +695,45 @@ pub async fn execute_puzzle_agent_action(
                 Err(response) => return Err(response),
             };
             let session = if ai_redraw {
-                if !try_register_puzzle_background_compile_task(&compile_session_id) {
+                let background_task_id =
+                    build_puzzle_background_compile_task_id(&compile_session_id);
+                let background_claim_id = build_puzzle_background_compile_claim_id(
+                    &background_task_id,
+                    request_context.request_id(),
+                );
+                let claim_result = state
+                    .spacetime_client()
+                    .claim_puzzle_background_compile_task(
+                        PuzzleBackgroundCompileTaskClaimRecordInput {
+                            task_id: background_task_id.clone(),
+                            claim_id: background_claim_id.clone(),
+                            session_id: compile_session_id.clone(),
+                            owner_user_id: owner_user_id.clone(),
+                            claimed_at_micros: current_utc_micros(),
+                        },
+                    )
+                    .await
+                    .map_err(map_puzzle_client_error);
+                match claim_result {
+                    Ok(false) => {
                         tracing::info!(
                             provider = PUZZLE_AGENT_API_BASE_PROVIDER,
                             session_id = %compile_session_id,
                             owner_user_id = %owner_user_id,
+                            task_id = %background_task_id,
                             "拼图首图后台生成任务已存在，本次 action 直接返回生成中会话"
                         );
                         state
                             .spacetime_client()
-                        .get_puzzle_agent_session(compile_session_id.clone(), owner_user_id.clone())
+                            .get_puzzle_agent_session(
+                                compile_session_id.clone(),
+                                owner_user_id.clone(),
+                            )
                             .await
                             .map(mark_puzzle_initial_generation_started_snapshot)
                             .map_err(map_puzzle_client_error)
-                } else {
+                    }
+                    Ok(true) => {
                         let compiled_session = state
                             .spacetime_client()
                             .compile_puzzle_agent_draft(
@@ -720,13 +745,16 @@ pub async fn execute_puzzle_agent_action(
                             .map_err(map_puzzle_compile_error);
                         match compiled_session {
                             Ok(compiled_session) => {
-                            let response_session = mark_puzzle_initial_generation_started_snapshot(
+                                let response_session =
+                                    mark_puzzle_initial_generation_started_snapshot(
                                         compiled_session.clone(),
                                     );
                                 let background_state = state.clone();
                                 let background_request_context = request_context.clone();
                                 let background_session_id = compile_session_id.clone();
                                 let background_owner_user_id = owner_user_id.clone();
+                                let background_task_id = background_task_id.clone();
+                                let background_claim_id = background_claim_id.clone();
                                 let background_prompt_text = prompt_text.map(str::to_string);
                                 let background_reference_image_src =
                                     primary_reference_image_src.map(str::to_string);
@@ -736,11 +764,14 @@ pub async fn execute_puzzle_agent_action(
                                     .draft
                                     .as_ref()
                                     .map(|draft| draft.work_title.clone());
-                            let background_billing_asset_id =
-                                format!("{background_session_id}:compile_puzzle_draft");
+                                let background_billing_asset_id = format!(
+                                    "{background_session_id}:compile_puzzle_draft:{}",
+                                    background_request_context.request_id()
+                                );
                                 tokio::spawn(async move {
                                     let operation_owner_user_id = background_owner_user_id.clone();
-                                let background_root_state = background_state.root_state().clone();
+                                    let background_root_state =
+                                        background_state.root_state().clone();
                                     let operation_state = background_state.clone();
                                     let result = execute_billable_asset_operation_with_cost(
                                         &background_root_state,
@@ -797,7 +828,8 @@ pub async fn execute_puzzle_agent_action(
                                                 .mark_puzzle_draft_generation_failed(
                                                     PuzzleDraftCompileFailureRecordInput {
                                                         session_id: background_session_id.clone(),
-                                                    owner_user_id: background_owner_user_id.clone(),
+                                                        owner_user_id: background_owner_user_id
+                                                            .clone(),
                                                         error_message: error_message.clone(),
                                                         failed_at_micros,
                                                     },
@@ -815,14 +847,17 @@ pub async fn execute_puzzle_agent_action(
                                                 send_generation_result_subscribe_message_after_completion(
                                                     &background_root_state,
                                                     GenerationResultSubscribeMessage {
-                                                    owner_user_id: background_owner_user_id.clone(),
+                                                        owner_user_id: background_owner_user_id
+                                                            .clone(),
                                                         task_name: Some("拼图".to_string()),
                                                         work_name: background_work_name.clone(),
                                                         status:
                                                             GenerationResultSubscribeMessageStatus::Failed,
                                                         consumed_points: 0,
                                                         completed_at_micros: failed_at_micros,
-                                                    page: Some("/pages/web-view/index".to_string()),
+                                                        page: Some(
+                                                            "/pages/web-view/index".to_string(),
+                                                        ),
                                                     },
                                                 )
                                                 .await;
@@ -836,16 +871,32 @@ pub async fn execute_puzzle_agent_action(
                                             );
                                         }
                                     }
-                                unregister_puzzle_background_compile_task(&background_session_id);
+                                    release_claimed_puzzle_background_compile_task(
+                                        &background_state,
+                                        &background_task_id,
+                                        &background_claim_id,
+                                        &background_session_id,
+                                        &background_owner_user_id,
+                                    )
+                                    .await;
                                 });
                                 Ok(response_session)
                             }
                             Err(error) => {
-                            unregister_puzzle_background_compile_task(&compile_session_id);
+                                release_claimed_puzzle_background_compile_task(
+                                    &state,
+                                    &background_task_id,
+                                    &background_claim_id,
+                                    &compile_session_id,
+                                    &owner_user_id,
+                                )
+                                .await;
                                 Err(error)
                             }
                         }
                     }
+                    Err(error) => Err(error),
+                }
             } else {
                 compile_puzzle_draft_with_uploaded_cover(
                     &state,
@@ -2231,7 +2282,7 @@ pub async fn use_puzzle_runtime_prop(
         }
     };
     let should_sync_freeze_boundary = matches!(prop_kind.as_str(), "freezeTime" | "freeze_time");
-    let billing_asset_id = format!("{}:{}:{}", run_id, prop_kind, current_utc_micros());
+    let billing_asset_id = format!("{}:{}:{}", run_id, prop_kind, request_context.request_id());
     let reducer_owner_user_id = owner_user_id.clone();
     let reducer_run_id = run_id.clone();
     let fallback_run_id = run_id.clone();

server-rs/crates/api-server/src/state.rs

@@ -41,6 +41,7 @@ use tracing::{info, warn};
 use crate::config::AppConfig;
 use crate::puzzle_gallery_cache::PuzzleGalleryCache;
 use crate::tracking_outbox::TrackingOutbox;
+use crate::wallet_refund_outbox::WalletRefundOutbox;
 use crate::wechat::pay::{build_wechat_pay_config, map_wechat_pay_init_error};
 use crate::wechat::provider::build_wechat_provider;
 use crate::work_author::{
@@ -263,6 +264,7 @@ pub struct AppStateInner {
     spacetime_client: SpacetimeClient,
     puzzle_gallery_cache: PuzzleGalleryCache,
     tracking_outbox: Option<Arc<TrackingOutbox>>,
+    wallet_refund_outbox: Option<Arc<WalletRefundOutbox>>,
     llm_client: Option<LlmClient>,
     creative_agent_gpt5_client: Option<LlmClient>,
     creative_agent_executor: Arc<MockLangChainRustAgentExecutor>,
@@ -406,6 +408,8 @@ impl AppState {
             procedure_timeout: config.spacetime_procedure_timeout,
         });
         let tracking_outbox = TrackingOutbox::from_config(&config, spacetime_client.clone());
+        let wallet_refund_outbox =
+            WalletRefundOutbox::from_config(&config, spacetime_client.clone());
         let llm_client = build_llm_client(&config)?;
         let creative_agent_gpt5_client = build_creative_agent_gpt5_client(&config)?;
         let http_request_permit_pools = HttpRequestPermitPools::from_config(&config);
@@ -441,6 +445,7 @@ impl AppState {
             spacetime_client,
             puzzle_gallery_cache: PuzzleGalleryCache::new(),
             tracking_outbox,
+            wallet_refund_outbox,
             llm_client,
             creative_agent_gpt5_client,
             creative_agent_executor: Arc::new(MockLangChainRustAgentExecutor),
@@ -922,6 +927,10 @@ impl AppState {
         self.tracking_outbox.clone()
     }
 
+    pub fn wallet_refund_outbox(&self) -> Option<Arc<WalletRefundOutbox>> {
+        self.wallet_refund_outbox.clone()
+    }
+
     pub fn llm_client(&self) -> Option<&LlmClient> {
         self.llm_client.as_ref()
     }

server-rs/crates/api-server/src/wallet_refund_outbox.rs

@@ -0,0 +1,463 @@
+use std::{
+    fmt,
+    path::{Path, PathBuf},
+    sync::Arc,
+    time::{Duration, SystemTime, UNIX_EPOCH},
+};
+
+use serde::{Deserialize, Serialize};
+use sha2::{Digest, Sha256};
+use spacetime_client::{SpacetimeClient, SpacetimeClientError};
+use tokio::{
+    fs::{self, File, OpenOptions},
+    io::{AsyncReadExt, AsyncWriteExt},
+    sync::{Mutex, Notify},
+    time::sleep,
+};
+use tracing::{debug, warn};
+
+use crate::config::AppConfig;
+
+const PENDING_FILE_PREFIX: &str = "refund-";
+const CORRUPT_FILE_PREFIX: &str = "corrupt-";
+const TEMP_FILE_PREFIX: &str = "tmp-";
+const OUTBOX_FILE_EXTENSION: &str = ".json";
+
+#[derive(Clone)]
+pub struct WalletRefundOutbox {
+    dir: PathBuf,
+    batch_size: usize,
+    flush_interval: Duration,
+    max_bytes: u64,
+    spacetime_client: SpacetimeClient,
+    enqueue_lock: Arc<Mutex<()>>,
+    flush_notify: Arc<Notify>,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub(crate) struct WalletRefundOutboxRecord {
+    pub owner_user_id: String,
+    pub amount: u64,
+    pub ledger_id: String,
+    pub created_at_micros: i64,
+    pub asset_kind: String,
+    pub asset_id: String,
+}
+
+#[derive(Debug)]
+pub enum WalletRefundOutboxEnqueueOutcome {
+    Enqueued,
+    Dropped { reason: &'static str },
+}
+
+#[derive(Debug)]
+pub enum WalletRefundOutboxError {
+    Io(std::io::Error),
+    Json(serde_json::Error),
+    Spacetime(SpacetimeClientError),
+}
+
+impl WalletRefundOutbox {
+    pub fn from_config(config: &AppConfig, spacetime_client: SpacetimeClient) -> Option<Arc<Self>> {
+        if !config.wallet_refund_outbox_enabled {
+            return None;
+        }
+
+        Some(Arc::new(Self {
+            dir: config.wallet_refund_outbox_dir.clone(),
+            batch_size: config.wallet_refund_outbox_batch_size.max(1),
+            flush_interval: config.wallet_refund_outbox_flush_interval,
+            max_bytes: config.wallet_refund_outbox_max_bytes,
+            spacetime_client,
+            enqueue_lock: Arc::new(Mutex::new(())),
+            flush_notify: Arc::new(Notify::new()),
+        }))
+    }
+
+    pub async fn enqueue(
+        &self,
+        record: WalletRefundOutboxRecord,
+    ) -> Result<WalletRefundOutboxEnqueueOutcome, WalletRefundOutboxError> {
+        let _guard = self.enqueue_lock.lock().await;
+        fs::create_dir_all(&self.dir).await?;
+
+        let pending_path = self.pending_path_for_ledger(&record.ledger_id);
+        if fs::metadata(&pending_path).await.is_ok() {
+            self.flush_notify.notify_one();
+            return Ok(WalletRefundOutboxEnqueueOutcome::Enqueued);
+        }
+
+        let bytes = serde_json::to_vec(&record)?;
+        let line_bytes = bytes.len().min(u64::MAX as usize) as u64;
+        let current_bytes = directory_size_if_exists(&self.dir).unwrap_or(0);
+        if current_bytes.saturating_add(line_bytes) > self.max_bytes {
+            return Ok(WalletRefundOutboxEnqueueOutcome::Dropped {
+                reason: "max_bytes",
+            });
+        }
+
+        let temp_path = self.temp_path();
+        let mut file = OpenOptions::new()
+            .create_new(true)
+            .write(true)
+            .open(&temp_path)
+            .await?;
+        file.write_all(&bytes).await?;
+        file.flush().await?;
+        file.sync_data().await?;
+        drop(file);
+        if fs::metadata(&pending_path).await.is_ok() {
+            let _ = fs::remove_file(&temp_path).await;
+            self.flush_notify.notify_one();
+            return Ok(WalletRefundOutboxEnqueueOutcome::Enqueued);
+        }
+        fs::rename(&temp_path, &pending_path).await?;
+        sync_directory_metadata(&self.dir).await?;
+        self.flush_notify.notify_one();
+        Ok(WalletRefundOutboxEnqueueOutcome::Enqueued)
+    }
+
+    pub fn spawn_worker(self: Arc<Self>) {
+        tokio::spawn(async move {
+            loop {
+                tokio::select! {
+                    _ = sleep(self.flush_interval) => {
+                        if let Err(error) = self.flush_pending_files_once().await {
+                            warn!(error = %error, "wallet refund outbox 重放退款失败，将保留文件等待重试");
+                        }
+                    }
+                    _ = self.flush_notify.notified() => {
+                        if let Err(error) = self.flush_pending_files_once().await {
+                            warn!(error = %error, "wallet refund outbox 主动重放退款失败，将保留文件等待重试");
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+    pub async fn flush_for_shutdown(&self) -> Result<(), WalletRefundOutboxError> {
+        self.flush_pending_files_once().await
+    }
+
+    async fn flush_pending_files_once(&self) -> Result<(), WalletRefundOutboxError> {
+        fs::create_dir_all(&self.dir).await?;
+        let pending_files = self.list_pending_files().await?;
+        for path in pending_files.into_iter().take(self.batch_size) {
+            let record = match read_refund_record(&path).await {
+                Ok(record) => record,
+                Err(error) if error.is_data_corruption() => {
+                    let corrupt_path = self.corrupt_path_for(&path);
+                    fs::rename(&path, &corrupt_path).await?;
+                    sync_directory_metadata(&self.dir).await?;
+                    warn!(
+                        error = %error,
+                        source = %path.display(),
+                        target = %corrupt_path.display(),
+                        "wallet refund outbox 文件无法解析，已隔离"
+                    );
+                    continue;
+                }
+                Err(error) => return Err(error),
+            };
+
+            match self
+                .spacetime_client
+                .refund_profile_wallet_points(
+                    record.owner_user_id.clone(),
+                    record.amount,
+                    record.ledger_id.clone(),
+                    record.created_at_micros,
+                )
+                .await
+            {
+                Ok(_) => {
+                    match fs::remove_file(&path).await {
+                        Ok(()) => {}
+                        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
+                        Err(error) => return Err(error.into()),
+                    }
+                    sync_directory_metadata(&self.dir).await?;
+                    debug!(
+                        ledger_id = %record.ledger_id,
+                        owner_user_id = %record.owner_user_id,
+                        asset_kind = %record.asset_kind,
+                        asset_id = %record.asset_id,
+                        path = %path.display(),
+                        "wallet refund outbox 退款已重放并删除文件"
+                    );
+                }
+                Err(error) => return Err(WalletRefundOutboxError::Spacetime(error)),
+            }
+        }
+        Ok(())
+    }
+
+    async fn list_pending_files(&self) -> Result<Vec<PathBuf>, WalletRefundOutboxError> {
+        let mut entries = fs::read_dir(&self.dir).await?;
+        let mut files = Vec::new();
+        while let Some(entry) = entries.next_entry().await? {
+            let path = entry.path();
+            let Some(name) = path.file_name().and_then(|value| value.to_str()) else {
+                continue;
+            };
+            if name.starts_with(PENDING_FILE_PREFIX) && name.ends_with(OUTBOX_FILE_EXTENSION) {
+                files.push(path);
+            }
+        }
+        files.sort();
+        Ok(files)
+    }
+
+    fn pending_path_for_ledger(&self, ledger_id: &str) -> PathBuf {
+        self.dir.join(format!(
+            "{PENDING_FILE_PREFIX}{}{OUTBOX_FILE_EXTENSION}",
+            ledger_id_hash(ledger_id)
+        ))
+    }
+
+    fn temp_path(&self) -> PathBuf {
+        self.dir.join(format!(
+            "{TEMP_FILE_PREFIX}{}-{uuid}{OUTBOX_FILE_EXTENSION}",
+            current_unix_micros(),
+            uuid = uuid::Uuid::new_v4()
+        ))
+    }
+
+    fn corrupt_path_for(&self, path: &Path) -> PathBuf {
+        let name = path
+            .file_name()
+            .and_then(|value| value.to_str())
+            .unwrap_or("unknown.json");
+        self.dir.join(format!(
+            "{CORRUPT_FILE_PREFIX}{}-{uuid}-{name}",
+            current_unix_micros(),
+            uuid = uuid::Uuid::new_v4()
+        ))
+    }
+}
+
+impl fmt::Debug for WalletRefundOutbox {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("WalletRefundOutbox")
+            .field("dir", &self.dir)
+            .field("batch_size", &self.batch_size)
+            .field("flush_interval", &self.flush_interval)
+            .field("max_bytes", &self.max_bytes)
+            .finish()
+    }
+}
+
+impl fmt::Display for WalletRefundOutboxError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Io(error) => write!(f, "{error}"),
+            Self::Json(error) => write!(f, "{error}"),
+            Self::Spacetime(error) => write!(f, "{error}"),
+        }
+    }
+}
+
+impl From<std::io::Error> for WalletRefundOutboxError {
+    fn from(value: std::io::Error) -> Self {
+        Self::Io(value)
+    }
+}
+
+impl From<serde_json::Error> for WalletRefundOutboxError {
+    fn from(value: serde_json::Error) -> Self {
+        Self::Json(value)
+    }
+}
+
+impl WalletRefundOutboxError {
+    fn is_data_corruption(&self) -> bool {
+        matches!(self, Self::Json(_))
+    }
+}
+
+async fn read_refund_record(
+    path: &Path,
+) -> Result<WalletRefundOutboxRecord, WalletRefundOutboxError> {
+    let mut file = File::open(path).await?;
+    let mut bytes = Vec::new();
+    file.read_to_end(&mut bytes).await?;
+    Ok(serde_json::from_slice::<WalletRefundOutboxRecord>(&bytes)?)
+}
+
+fn directory_size_if_exists(path: &Path) -> Result<u64, std::io::Error> {
+    if !path.is_dir() {
+        return Ok(0);
+    }
+
+    let mut total = 0u64;
+    for entry in std::fs::read_dir(path)? {
+        let entry = entry?;
+        if !is_pending_outbox_file_name(&entry.file_name()) {
+            continue;
+        }
+        let metadata = entry.metadata()?;
+        if metadata.is_file() {
+            total = total.saturating_add(metadata.len());
+        }
+    }
+    Ok(total)
+}
+
+fn current_unix_micros() -> u128 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_micros()
+}
+
+fn ledger_id_hash(ledger_id: &str) -> String {
+    hex::encode(Sha256::digest(ledger_id.as_bytes()))
+}
+
+fn is_pending_outbox_file_name(name: &std::ffi::OsStr) -> bool {
+    name.to_str().is_some_and(|value| {
+        value.starts_with(PENDING_FILE_PREFIX) && value.ends_with(OUTBOX_FILE_EXTENSION)
+    })
+}
+
+async fn sync_directory_metadata(path: &Path) -> Result<(), WalletRefundOutboxError> {
+    let path = path.to_path_buf();
+    tokio::task::spawn_blocking(move || {
+        let dir = std::fs::File::open(path)?;
+        dir.sync_all()
+    })
+    .await
+    .map_err(|error| std::io::Error::new(std::io::ErrorKind::Other, error.to_string()))??;
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn sample_record(ledger_id: &str) -> WalletRefundOutboxRecord {
+        WalletRefundOutboxRecord {
+            owner_user_id: "user-1".to_string(),
+            amount: 2,
+            ledger_id: ledger_id.to_string(),
+            created_at_micros: 1_713_680_000_000_000,
+            asset_kind: "puzzle_initial_image".to_string(),
+            asset_id: "asset-1".to_string(),
+        }
+    }
+
+    fn test_dir(name: &str) -> PathBuf {
+        let dir = std::env::temp_dir().join(format!(
+            "genarrative-wallet-refund-outbox-{name}-{}",
+            current_unix_micros()
+        ));
+        let _ = std::fs::remove_dir_all(&dir);
+        dir
+    }
+
+    fn test_outbox(dir: PathBuf, max_bytes: u64) -> Arc<WalletRefundOutbox> {
+        let config = AppConfig {
+            wallet_refund_outbox_dir: dir,
+            wallet_refund_outbox_batch_size: 500,
+            wallet_refund_outbox_flush_interval: Duration::from_secs(60),
+            wallet_refund_outbox_max_bytes: max_bytes,
+            ..AppConfig::default()
+        };
+        WalletRefundOutbox::from_config(
+            &config,
+            SpacetimeClient::new(spacetime_client::SpacetimeClientConfig {
+                server_url: "http://127.0.0.1:1".to_string(),
+                database: "missing".to_string(),
+                token: None,
+                pool_size: 1,
+                procedure_timeout: Duration::from_millis(10),
+            }),
+        )
+        .expect("outbox should be enabled")
+    }
+
+    #[tokio::test]
+    async fn enqueue_is_idempotent_per_ledger_id() {
+        let dir = test_dir("idempotent");
+        let outbox = test_outbox(dir.clone(), 1024 * 1024);
+
+        outbox.enqueue(sample_record("ledger-1")).await.unwrap();
+        outbox.enqueue(sample_record("ledger-1")).await.unwrap();
+
+        let pending_count = std::fs::read_dir(&dir)
+            .unwrap()
+            .filter_map(Result::ok)
+            .filter(|entry| is_pending_outbox_file_name(&entry.file_name()))
+            .count();
+        assert_eq!(pending_count, 1);
+
+        let _ = std::fs::remove_dir_all(dir);
+    }
+
+    #[tokio::test]
+    async fn enqueue_drops_when_outbox_exceeds_max_bytes() {
+        let dir = test_dir("max-bytes");
+        let outbox = test_outbox(dir.clone(), 1);
+
+        let outcome = outbox.enqueue(sample_record("ledger-1")).await.unwrap();
+
+        assert!(matches!(
+            outcome,
+            WalletRefundOutboxEnqueueOutcome::Dropped {
+                reason: "max_bytes"
+            }
+        ));
+        assert!(!dir.exists() || std::fs::read_dir(&dir).unwrap().next().is_none());
+
+        let _ = std::fs::remove_dir_all(dir);
+    }
+
+    #[tokio::test]
+    async fn flush_quarantines_corrupt_file() {
+        let dir = test_dir("corrupt");
+        std::fs::create_dir_all(&dir).unwrap();
+        let pending_path = dir.join(format!("{PENDING_FILE_PREFIX}bad{OUTBOX_FILE_EXTENSION}"));
+        std::fs::write(&pending_path, b"{not-json}").unwrap();
+        let outbox = test_outbox(dir.clone(), 1024 * 1024);
+
+        outbox.flush_pending_files_once().await.unwrap();
+
+        assert!(!pending_path.exists());
+        let corrupt_count = std::fs::read_dir(&dir)
+            .unwrap()
+            .filter_map(Result::ok)
+            .filter(|entry| {
+                entry
+                    .file_name()
+                    .to_str()
+                    .is_some_and(|name| name.starts_with(CORRUPT_FILE_PREFIX))
+            })
+            .count();
+        assert_eq!(corrupt_count, 1);
+
+        let _ = std::fs::remove_dir_all(dir);
+    }
+
+    #[tokio::test]
+    async fn shutdown_flush_keeps_file_when_spacetime_is_unavailable() {
+        let dir = test_dir("shutdown");
+        let outbox = test_outbox(dir.clone(), 1024 * 1024);
+
+        outbox.enqueue(sample_record("ledger-1")).await.unwrap();
+        let result = outbox.flush_for_shutdown().await;
+
+        assert!(
+            matches!(result, Err(WalletRefundOutboxError::Spacetime(_))),
+            "missing test SpacetimeDB should keep refund file for retry"
+        );
+        let pending_count = std::fs::read_dir(&dir)
+            .unwrap()
+            .filter_map(Result::ok)
+            .filter(|entry| is_pending_outbox_file_name(&entry.file_name()))
+            .count();
+        assert_eq!(pending_count, 1);
+
+        let _ = std::fs::remove_dir_all(dir);
+    }
+}

server-rs/crates/module-puzzle/src/application.rs

@@ -20,6 +20,14 @@ pub struct PuzzleAgentSessionProcedureResult {
     pub error_message: Option<String>,
 }
 
+#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct PuzzleBackgroundCompileTaskProcedureResult {
+    pub ok: bool,
+    pub claimed: bool,
+    pub error_message: Option<String>,
+}
+
 #[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct PuzzleWorksProcedureResult {

server-rs/crates/module-puzzle/src/commands.rs

@@ -68,6 +68,25 @@ pub struct PuzzleDraftCompileInput {
     pub compiled_at_micros: i64,
 }
 
+#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct PuzzleBackgroundCompileTaskClaimInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+    pub claimed_at_micros: i64,
+}
+
+#[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct PuzzleBackgroundCompileTaskReleaseInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+}
+
 #[cfg_attr(feature = "spacetime-types", derive(SpacetimeType))]
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct PuzzleDraftCompileFailureInput {

server-rs/crates/spacetime-client/src/lib.rs

@@ -51,7 +51,8 @@ pub use mapper::{
     PublicWorkGalleryEntryRecord, PuzzleAgentMessageFinalizeRecordInput, PuzzleAgentMessageRecord,
     PuzzleAgentMessageSubmitRecordInput, PuzzleAgentSessionCreateRecordInput,
     PuzzleAgentSessionRecord, PuzzleAgentSuggestedActionRecord, PuzzleAnchorItemRecord,
-    PuzzleAnchorPackRecord, PuzzleAudioAssetRecord, PuzzleBoardRecord, PuzzleCellPositionRecord,
+    PuzzleAnchorPackRecord, PuzzleAudioAssetRecord, PuzzleBackgroundCompileTaskClaimRecordInput,
+    PuzzleBackgroundCompileTaskReleaseRecordInput, PuzzleBoardRecord, PuzzleCellPositionRecord,
     PuzzleClearActionRequest, PuzzleClearActionResponse, PuzzleClearActionType,
     PuzzleClearBoardCell, PuzzleClearBoardSnapshot, PuzzleClearCardAsset, PuzzleClearDraftResponse,
     PuzzleClearGenerationStatus, PuzzleClearImageAsset, PuzzleClearNextLevelRequest,

server-rs/crates/spacetime-client/src/mapper.rs

@@ -101,7 +101,8 @@ pub use self::puzzle::{
     PuzzleAgentMessageFinalizeRecordInput, PuzzleAgentMessageRecord,
     PuzzleAgentMessageSubmitRecordInput, PuzzleAgentSessionCreateRecordInput,
     PuzzleAgentSessionRecord, PuzzleAgentSuggestedActionRecord, PuzzleAnchorItemRecord,
-    PuzzleAnchorPackRecord, PuzzleAudioAssetRecord, PuzzleBoardRecord, PuzzleCellPositionRecord,
+    PuzzleAnchorPackRecord, PuzzleAudioAssetRecord, PuzzleBackgroundCompileTaskClaimRecordInput,
+    PuzzleBackgroundCompileTaskReleaseRecordInput, PuzzleBoardRecord, PuzzleCellPositionRecord,
     PuzzleCreatorIntentRecord, PuzzleDraftCompileFailureRecordInput, PuzzleDraftLevelRecord,
     PuzzleFormDraftRecord, PuzzleFormDraftSaveRecordInput, PuzzleGalleryCardRecord,
     PuzzleGeneratedImageCandidateRecord, PuzzleGeneratedImagesSaveRecordInput,
@@ -199,10 +200,10 @@ pub(crate) use self::public_work::{
     map_public_work_gallery_entry, map_public_work_gallery_entry_to_detail_entry,
 };
 pub(crate) use self::puzzle::{
-    map_puzzle_agent_session_procedure_result, map_puzzle_gallery_card_view_row,
-    map_puzzle_run_procedure_result, map_puzzle_work_procedure_result,
-    map_puzzle_works_procedure_result, map_runtime_profile_wallet_ledger_source_type_back,
-    parse_puzzle_agent_stage_record,
+    map_puzzle_agent_session_procedure_result, map_puzzle_background_compile_task_procedure_result,
+    map_puzzle_gallery_card_view_row, map_puzzle_run_procedure_result,
+    map_puzzle_work_procedure_result, map_puzzle_works_procedure_result,
+    map_runtime_profile_wallet_ledger_source_type_back, parse_puzzle_agent_stage_record,
 };
 pub(crate) use self::puzzle_clear::{
     map_puzzle_clear_agent_session_procedure_result, map_puzzle_clear_gallery_card_view_row,

server-rs/crates/spacetime-client/src/mapper/puzzle.rs

@@ -13,6 +13,16 @@ pub(crate) fn map_puzzle_agent_session_procedure_result(
     Ok(map_puzzle_agent_session_snapshot(session))
 }
 
+pub(crate) fn map_puzzle_background_compile_task_procedure_result(
+    result: PuzzleBackgroundCompileTaskProcedureResult,
+) -> Result<bool, SpacetimeClientError> {
+    if !result.ok {
+        return Err(SpacetimeClientError::procedure_failed(result.error_message));
+    }
+
+    Ok(result.claimed)
+}
+
 pub(crate) fn map_puzzle_work_procedure_result(
     result: PuzzleWorkProcedureResult,
 ) -> Result<PuzzleWorkProfileRecord, SpacetimeClientError> {
@@ -614,6 +624,23 @@ pub struct PuzzleFormDraftSaveRecordInput {
     pub saved_at_micros: i64,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct PuzzleBackgroundCompileTaskClaimRecordInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+    pub claimed_at_micros: i64,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct PuzzleBackgroundCompileTaskReleaseRecordInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+}
+
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct PuzzleAgentMessageSubmitRecordInput {
     pub session_id: String,

server-rs/crates/spacetime-client/src/module_bindings.rs

@@ -204,6 +204,7 @@ pub mod chapter_progression_table;
 pub mod chapter_progression_type;
 pub mod checkpoint_wooden_fish_run_procedure;
 pub mod claim_profile_task_reward_and_return_procedure;
+pub mod claim_puzzle_background_compile_task_procedure;
 pub mod claim_puzzle_work_point_incentive_procedure;
 pub mod clear_database_migration_import_chunks_procedure;
 pub mod clear_platform_browse_history_and_return_procedure;
@@ -628,6 +629,11 @@ pub mod puzzle_anchor_item_type;
 pub mod puzzle_anchor_pack_type;
 pub mod puzzle_anchor_status_type;
 pub mod puzzle_audio_asset_type;
+pub mod puzzle_background_compile_task_claim_input_type;
+pub mod puzzle_background_compile_task_procedure_result_type;
+pub mod puzzle_background_compile_task_release_input_type;
+pub mod puzzle_background_compile_task_row_type;
+pub mod puzzle_background_compile_task_table;
 pub mod puzzle_board_snapshot_type;
 pub mod puzzle_cell_position_type;
 pub mod puzzle_clear_agent_session_create_input_type;
@@ -766,6 +772,7 @@ pub mod redeem_profile_reward_code_procedure;
 pub mod refresh_session_table;
 pub mod refresh_session_type;
 pub mod refund_profile_wallet_points_and_return_procedure;
+pub mod release_puzzle_background_compile_task_procedure;
 pub mod remix_big_fish_work_procedure;
 pub mod remix_custom_world_profile_procedure;
 pub mod remix_puzzle_work_procedure;
@@ -1312,6 +1319,7 @@ pub use chapter_progression_table::*;
 pub use chapter_progression_type::ChapterProgression;
 pub use checkpoint_wooden_fish_run_procedure::checkpoint_wooden_fish_run;
 pub use claim_profile_task_reward_and_return_procedure::claim_profile_task_reward_and_return;
+pub use claim_puzzle_background_compile_task_procedure::claim_puzzle_background_compile_task;
 pub use claim_puzzle_work_point_incentive_procedure::claim_puzzle_work_point_incentive;
 pub use clear_database_migration_import_chunks_procedure::clear_database_migration_import_chunks;
 pub use clear_platform_browse_history_and_return_procedure::clear_platform_browse_history_and_return;
@@ -1736,6 +1744,11 @@ pub use puzzle_anchor_item_type::PuzzleAnchorItem;
 pub use puzzle_anchor_pack_type::PuzzleAnchorPack;
 pub use puzzle_anchor_status_type::PuzzleAnchorStatus;
 pub use puzzle_audio_asset_type::PuzzleAudioAsset;
+pub use puzzle_background_compile_task_claim_input_type::PuzzleBackgroundCompileTaskClaimInput;
+pub use puzzle_background_compile_task_procedure_result_type::PuzzleBackgroundCompileTaskProcedureResult;
+pub use puzzle_background_compile_task_release_input_type::PuzzleBackgroundCompileTaskReleaseInput;
+pub use puzzle_background_compile_task_row_type::PuzzleBackgroundCompileTaskRow;
+pub use puzzle_background_compile_task_table::*;
 pub use puzzle_board_snapshot_type::PuzzleBoardSnapshot;
 pub use puzzle_cell_position_type::PuzzleCellPosition;
 pub use puzzle_clear_agent_session_create_input_type::PuzzleClearAgentSessionCreateInput;
@@ -1874,6 +1887,7 @@ pub use redeem_profile_reward_code_procedure::redeem_profile_reward_code;
 pub use refresh_session_table::*;
 pub use refresh_session_type::RefreshSession;
 pub use refund_profile_wallet_points_and_return_procedure::refund_profile_wallet_points_and_return;
+pub use release_puzzle_background_compile_task_procedure::release_puzzle_background_compile_task;
 pub use remix_big_fish_work_procedure::remix_big_fish_work;
 pub use remix_custom_world_profile_procedure::remix_custom_world_profile;
 pub use remix_puzzle_work_procedure::remix_puzzle_work;
@@ -2569,6 +2583,7 @@ pub struct DbUpdate {
     public_work_play_daily_stat: __sdk::TableUpdate<PublicWorkPlayDailyStat>,
     puzzle_agent_message: __sdk::TableUpdate<PuzzleAgentMessageRow>,
     puzzle_agent_session: __sdk::TableUpdate<PuzzleAgentSessionRow>,
+    puzzle_background_compile_task: __sdk::TableUpdate<PuzzleBackgroundCompileTaskRow>,
     puzzle_clear_agent_session: __sdk::TableUpdate<PuzzleClearAgentSessionRow>,
     puzzle_clear_event: __sdk::TableUpdate<PuzzleClearEventRow>,
     puzzle_clear_gallery_card_view: __sdk::TableUpdate<PuzzleClearGalleryCardViewRow>,
@@ -2854,6 +2869,11 @@ impl TryFrom<__ws::v2::TransactionUpdate> for DbUpdate {
                 "puzzle_agent_session" => db_update.puzzle_agent_session.append(
                     puzzle_agent_session_table::parse_table_update(table_update)?,
                 ),
+                "puzzle_background_compile_task" => {
+                    db_update.puzzle_background_compile_task.append(
+                        puzzle_background_compile_task_table::parse_table_update(table_update)?,
+                    )
+                }
                 "puzzle_clear_agent_session" => db_update.puzzle_clear_agent_session.append(
                     puzzle_clear_agent_session_table::parse_table_update(table_update)?,
                 ),
@@ -3373,6 +3393,12 @@ impl __sdk::DbUpdate for DbUpdate {
                 &self.puzzle_agent_session,
             )
             .with_updates_by_pk(|row| &row.session_id);
+        diff.puzzle_background_compile_task = cache
+            .apply_diff_to_table::<PuzzleBackgroundCompileTaskRow>(
+                "puzzle_background_compile_task",
+                &self.puzzle_background_compile_task,
+            )
+            .with_updates_by_pk(|row| &row.task_id);
         diff.puzzle_clear_agent_session = cache
             .apply_diff_to_table::<PuzzleClearAgentSessionRow>(
                 "puzzle_clear_agent_session",
@@ -3828,6 +3854,9 @@ impl __sdk::DbUpdate for DbUpdate {
                 "puzzle_agent_session" => db_update
                     .puzzle_agent_session
                     .append(__sdk::parse_row_list_as_inserts(table_rows.rows)?),
+                "puzzle_background_compile_task" => db_update
+                    .puzzle_background_compile_task
+                    .append(__sdk::parse_row_list_as_inserts(table_rows.rows)?),
                 "puzzle_clear_agent_session" => db_update
                     .puzzle_clear_agent_session
                     .append(__sdk::parse_row_list_as_inserts(table_rows.rows)?),
@@ -4192,6 +4221,9 @@ impl __sdk::DbUpdate for DbUpdate {
                 "puzzle_agent_session" => db_update
                     .puzzle_agent_session
                     .append(__sdk::parse_row_list_as_deletes(table_rows.rows)?),
+                "puzzle_background_compile_task" => db_update
+                    .puzzle_background_compile_task
+                    .append(__sdk::parse_row_list_as_deletes(table_rows.rows)?),
                 "puzzle_clear_agent_session" => db_update
                     .puzzle_clear_agent_session
                     .append(__sdk::parse_row_list_as_deletes(table_rows.rows)?),
@@ -4410,6 +4442,7 @@ pub struct AppliedDiff<'r> {
     public_work_play_daily_stat: __sdk::TableAppliedDiff<'r, PublicWorkPlayDailyStat>,
     puzzle_agent_message: __sdk::TableAppliedDiff<'r, PuzzleAgentMessageRow>,
     puzzle_agent_session: __sdk::TableAppliedDiff<'r, PuzzleAgentSessionRow>,
+    puzzle_background_compile_task: __sdk::TableAppliedDiff<'r, PuzzleBackgroundCompileTaskRow>,
     puzzle_clear_agent_session: __sdk::TableAppliedDiff<'r, PuzzleClearAgentSessionRow>,
     puzzle_clear_event: __sdk::TableAppliedDiff<'r, PuzzleClearEventRow>,
     puzzle_clear_gallery_card_view: __sdk::TableAppliedDiff<'r, PuzzleClearGalleryCardViewRow>,
@@ -4829,6 +4862,11 @@ impl<'r> __sdk::AppliedDiff<'r> for AppliedDiff<'r> {
             &self.puzzle_agent_session,
             event,
         );
+        callbacks.invoke_table_row_callbacks::<PuzzleBackgroundCompileTaskRow>(
+            "puzzle_background_compile_task",
+            &self.puzzle_background_compile_task,
+            event,
+        );
         callbacks.invoke_table_row_callbacks::<PuzzleClearAgentSessionRow>(
             "puzzle_clear_agent_session",
             &self.puzzle_clear_agent_session,
@@ -5766,6 +5804,7 @@ impl __sdk::SpacetimeModule for RemoteModule {
         public_work_play_daily_stat_table::register_table(client_cache);
         puzzle_agent_message_table::register_table(client_cache);
         puzzle_agent_session_table::register_table(client_cache);
+        puzzle_background_compile_task_table::register_table(client_cache);
         puzzle_clear_agent_session_table::register_table(client_cache);
         puzzle_clear_event_table::register_table(client_cache);
         puzzle_clear_gallery_card_view_table::register_table(client_cache);
@@ -5885,6 +5924,7 @@ impl __sdk::SpacetimeModule for RemoteModule {
         "public_work_play_daily_stat",
         "puzzle_agent_message",
         "puzzle_agent_session",
+        "puzzle_background_compile_task",
         "puzzle_clear_agent_session",
         "puzzle_clear_event",
         "puzzle_clear_gallery_card_view",

server-rs/crates/spacetime-client/src/module_bindings/claim_puzzle_background_compile_task_procedure.rs

@@ -0,0 +1,59 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+use super::puzzle_background_compile_task_claim_input_type::PuzzleBackgroundCompileTaskClaimInput;
+use super::puzzle_background_compile_task_procedure_result_type::PuzzleBackgroundCompileTaskProcedureResult;
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+struct ClaimPuzzleBackgroundCompileTaskArgs {
+    pub input: PuzzleBackgroundCompileTaskClaimInput,
+}
+
+impl __sdk::InModule for ClaimPuzzleBackgroundCompileTaskArgs {
+    type Module = super::RemoteModule;
+}
+
+#[allow(non_camel_case_types)]
+/// Extension trait for access to the procedure `claim_puzzle_background_compile_task`.
+///
+/// Implemented for [`super::RemoteProcedures`].
+pub trait claim_puzzle_background_compile_task {
+    fn claim_puzzle_background_compile_task(&self, input: PuzzleBackgroundCompileTaskClaimInput) {
+        self.claim_puzzle_background_compile_task_then(input, |_, _| {});
+    }
+
+    fn claim_puzzle_background_compile_task_then(
+        &self,
+        input: PuzzleBackgroundCompileTaskClaimInput,
+
+        __callback: impl FnOnce(
+                &super::ProcedureEventContext,
+                Result<PuzzleBackgroundCompileTaskProcedureResult, __sdk::InternalError>,
+            ) + Send
+            + 'static,
+    );
+}
+
+impl claim_puzzle_background_compile_task for super::RemoteProcedures {
+    fn claim_puzzle_background_compile_task_then(
+        &self,
+        input: PuzzleBackgroundCompileTaskClaimInput,
+
+        __callback: impl FnOnce(
+                &super::ProcedureEventContext,
+                Result<PuzzleBackgroundCompileTaskProcedureResult, __sdk::InternalError>,
+            ) + Send
+            + 'static,
+    ) {
+        self.imp
+            .invoke_procedure_with_callback::<_, PuzzleBackgroundCompileTaskProcedureResult>(
+                "claim_puzzle_background_compile_task",
+                ClaimPuzzleBackgroundCompileTaskArgs { input },
+                __callback,
+            );
+    }
+}

server-rs/crates/spacetime-client/src/module_bindings/puzzle_background_compile_task_claim_input_type.rs

@@ -0,0 +1,19 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct PuzzleBackgroundCompileTaskClaimInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+    pub claimed_at_micros: i64,
+}
+
+impl __sdk::InModule for PuzzleBackgroundCompileTaskClaimInput {
+    type Module = super::RemoteModule;
+}

server-rs/crates/spacetime-client/src/module_bindings/puzzle_background_compile_task_procedure_result_type.rs

@@ -0,0 +1,17 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct PuzzleBackgroundCompileTaskProcedureResult {
+    pub ok: bool,
+    pub claimed: bool,
+    pub error_message: Option<String>,
+}
+
+impl __sdk::InModule for PuzzleBackgroundCompileTaskProcedureResult {
+    type Module = super::RemoteModule;
+}

server-rs/crates/spacetime-client/src/module_bindings/puzzle_background_compile_task_release_input_type.rs

@@ -0,0 +1,18 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct PuzzleBackgroundCompileTaskReleaseInput {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+}
+
+impl __sdk::InModule for PuzzleBackgroundCompileTaskReleaseInput {
+    type Module = super::RemoteModule;
+}

server-rs/crates/spacetime-client/src/module_bindings/puzzle_background_compile_task_row_type.rs

@@ -0,0 +1,66 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct PuzzleBackgroundCompileTaskRow {
+    pub task_id: String,
+    pub claim_id: String,
+    pub session_id: String,
+    pub owner_user_id: String,
+    pub created_at: __sdk::Timestamp,
+    pub updated_at: __sdk::Timestamp,
+}
+
+impl __sdk::InModule for PuzzleBackgroundCompileTaskRow {
+    type Module = super::RemoteModule;
+}
+
+/// Column accessor struct for the table `PuzzleBackgroundCompileTaskRow`.
+///
+/// Provides typed access to columns for query building.
+pub struct PuzzleBackgroundCompileTaskRowCols {
+    pub task_id: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, String>,
+    pub claim_id: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, String>,
+    pub session_id: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, String>,
+    pub owner_user_id: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, String>,
+    pub created_at: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, __sdk::Timestamp>,
+    pub updated_at: __sdk::__query_builder::Col<PuzzleBackgroundCompileTaskRow, __sdk::Timestamp>,
+}
+
+impl __sdk::__query_builder::HasCols for PuzzleBackgroundCompileTaskRow {
+    type Cols = PuzzleBackgroundCompileTaskRowCols;
+    fn cols(table_name: &'static str) -> Self::Cols {
+        PuzzleBackgroundCompileTaskRowCols {
+            task_id: __sdk::__query_builder::Col::new(table_name, "task_id"),
+            claim_id: __sdk::__query_builder::Col::new(table_name, "claim_id"),
+            session_id: __sdk::__query_builder::Col::new(table_name, "session_id"),
+            owner_user_id: __sdk::__query_builder::Col::new(table_name, "owner_user_id"),
+            created_at: __sdk::__query_builder::Col::new(table_name, "created_at"),
+            updated_at: __sdk::__query_builder::Col::new(table_name, "updated_at"),
+        }
+    }
+}
+
+/// Indexed column accessor struct for the table `PuzzleBackgroundCompileTaskRow`.
+///
+/// Provides typed access to indexed columns for query building.
+pub struct PuzzleBackgroundCompileTaskRowIxCols {
+    pub session_id: __sdk::__query_builder::IxCol<PuzzleBackgroundCompileTaskRow, String>,
+    pub task_id: __sdk::__query_builder::IxCol<PuzzleBackgroundCompileTaskRow, String>,
+}
+
+impl __sdk::__query_builder::HasIxCols for PuzzleBackgroundCompileTaskRow {
+    type IxCols = PuzzleBackgroundCompileTaskRowIxCols;
+    fn ix_cols(table_name: &'static str) -> Self::IxCols {
+        PuzzleBackgroundCompileTaskRowIxCols {
+            session_id: __sdk::__query_builder::IxCol::new(table_name, "session_id"),
+            task_id: __sdk::__query_builder::IxCol::new(table_name, "task_id"),
+        }
+    }
+}
+
+impl __sdk::__query_builder::CanBeLookupTable for PuzzleBackgroundCompileTaskRow {}

server-rs/crates/spacetime-client/src/module_bindings/puzzle_background_compile_task_table.rs

@@ -0,0 +1,169 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use super::puzzle_background_compile_task_row_type::PuzzleBackgroundCompileTaskRow;
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+/// Table handle for the table `puzzle_background_compile_task`.
+///
+/// Obtain a handle from the [`PuzzleBackgroundCompileTaskTableAccess::puzzle_background_compile_task`] method on [`super::RemoteTables`],
+/// like `ctx.db.puzzle_background_compile_task()`.
+///
+/// Users are encouraged not to explicitly reference this type,
+/// but to directly chain method calls,
+/// like `ctx.db.puzzle_background_compile_task().on_insert(...)`.
+pub struct PuzzleBackgroundCompileTaskTableHandle<'ctx> {
+    imp: __sdk::TableHandle<PuzzleBackgroundCompileTaskRow>,
+    ctx: std::marker::PhantomData<&'ctx super::RemoteTables>,
+}
+
+#[allow(non_camel_case_types)]
+/// Extension trait for access to the table `puzzle_background_compile_task`.
+///
+/// Implemented for [`super::RemoteTables`].
+pub trait PuzzleBackgroundCompileTaskTableAccess {
+    #[allow(non_snake_case)]
+    /// Obtain a [`PuzzleBackgroundCompileTaskTableHandle`], which mediates access to the table `puzzle_background_compile_task`.
+    fn puzzle_background_compile_task(&self) -> PuzzleBackgroundCompileTaskTableHandle<'_>;
+}
+
+impl PuzzleBackgroundCompileTaskTableAccess for super::RemoteTables {
+    fn puzzle_background_compile_task(&self) -> PuzzleBackgroundCompileTaskTableHandle<'_> {
+        PuzzleBackgroundCompileTaskTableHandle {
+            imp: self
+                .imp
+                .get_table::<PuzzleBackgroundCompileTaskRow>("puzzle_background_compile_task"),
+            ctx: std::marker::PhantomData,
+        }
+    }
+}
+
+pub struct PuzzleBackgroundCompileTaskInsertCallbackId(__sdk::CallbackId);
+pub struct PuzzleBackgroundCompileTaskDeleteCallbackId(__sdk::CallbackId);
+
+impl<'ctx> __sdk::Table for PuzzleBackgroundCompileTaskTableHandle<'ctx> {
+    type Row = PuzzleBackgroundCompileTaskRow;
+    type EventContext = super::EventContext;
+
+    fn count(&self) -> u64 {
+        self.imp.count()
+    }
+    fn iter(&self) -> impl Iterator<Item = PuzzleBackgroundCompileTaskRow> + '_ {
+        self.imp.iter()
+    }
+
+    type InsertCallbackId = PuzzleBackgroundCompileTaskInsertCallbackId;
+
+    fn on_insert(
+        &self,
+        callback: impl FnMut(&Self::EventContext, &Self::Row) + Send + 'static,
+    ) -> PuzzleBackgroundCompileTaskInsertCallbackId {
+        PuzzleBackgroundCompileTaskInsertCallbackId(self.imp.on_insert(Box::new(callback)))
+    }
+
+    fn remove_on_insert(&self, callback: PuzzleBackgroundCompileTaskInsertCallbackId) {
+        self.imp.remove_on_insert(callback.0)
+    }
+
+    type DeleteCallbackId = PuzzleBackgroundCompileTaskDeleteCallbackId;
+
+    fn on_delete(
+        &self,
+        callback: impl FnMut(&Self::EventContext, &Self::Row) + Send + 'static,
+    ) -> PuzzleBackgroundCompileTaskDeleteCallbackId {
+        PuzzleBackgroundCompileTaskDeleteCallbackId(self.imp.on_delete(Box::new(callback)))
+    }
+
+    fn remove_on_delete(&self, callback: PuzzleBackgroundCompileTaskDeleteCallbackId) {
+        self.imp.remove_on_delete(callback.0)
+    }
+}
+
+pub struct PuzzleBackgroundCompileTaskUpdateCallbackId(__sdk::CallbackId);
+
+impl<'ctx> __sdk::TableWithPrimaryKey for PuzzleBackgroundCompileTaskTableHandle<'ctx> {
+    type UpdateCallbackId = PuzzleBackgroundCompileTaskUpdateCallbackId;
+
+    fn on_update(
+        &self,
+        callback: impl FnMut(&Self::EventContext, &Self::Row, &Self::Row) + Send + 'static,
+    ) -> PuzzleBackgroundCompileTaskUpdateCallbackId {
+        PuzzleBackgroundCompileTaskUpdateCallbackId(self.imp.on_update(Box::new(callback)))
+    }
+
+    fn remove_on_update(&self, callback: PuzzleBackgroundCompileTaskUpdateCallbackId) {
+        self.imp.remove_on_update(callback.0)
+    }
+}
+
+/// Access to the `task_id` unique index on the table `puzzle_background_compile_task`,
+/// which allows point queries on the field of the same name
+/// via the [`PuzzleBackgroundCompileTaskTaskIdUnique::find`] method.
+///
+/// Users are encouraged not to explicitly reference this type,
+/// but to directly chain method calls,
+/// like `ctx.db.puzzle_background_compile_task().task_id().find(...)`.
+pub struct PuzzleBackgroundCompileTaskTaskIdUnique<'ctx> {
+    imp: __sdk::UniqueConstraintHandle<PuzzleBackgroundCompileTaskRow, String>,
+    phantom: std::marker::PhantomData<&'ctx super::RemoteTables>,
+}
+
+impl<'ctx> PuzzleBackgroundCompileTaskTableHandle<'ctx> {
+    /// Get a handle on the `task_id` unique index on the table `puzzle_background_compile_task`.
+    pub fn task_id(&self) -> PuzzleBackgroundCompileTaskTaskIdUnique<'ctx> {
+        PuzzleBackgroundCompileTaskTaskIdUnique {
+            imp: self.imp.get_unique_constraint::<String>("task_id"),
+            phantom: std::marker::PhantomData,
+        }
+    }
+}
+
+impl<'ctx> PuzzleBackgroundCompileTaskTaskIdUnique<'ctx> {
+    /// Find the subscribed row whose `task_id` column value is equal to `col_val`,
+    /// if such a row is present in the client cache.
+    pub fn find(&self, col_val: &String) -> Option<PuzzleBackgroundCompileTaskRow> {
+        self.imp.find(col_val)
+    }
+}
+
+#[doc(hidden)]
+pub(super) fn register_table(client_cache: &mut __sdk::ClientCache<super::RemoteModule>) {
+    let _table = client_cache
+        .get_or_make_table::<PuzzleBackgroundCompileTaskRow>("puzzle_background_compile_task");
+    _table.add_unique_constraint::<String>("task_id", |row| &row.task_id);
+}
+
+#[doc(hidden)]
+pub(super) fn parse_table_update(
+    raw_updates: __ws::v2::TableUpdate,
+) -> __sdk::Result<__sdk::TableUpdate<PuzzleBackgroundCompileTaskRow>> {
+    __sdk::TableUpdate::parse_table_update(raw_updates).map_err(|e| {
+        __sdk::InternalError::failed_parse(
+            "TableUpdate<PuzzleBackgroundCompileTaskRow>",
+            "TableUpdate",
+        )
+        .with_cause(e)
+        .into()
+    })
+}
+
+#[allow(non_camel_case_types)]
+/// Extension trait for query builder access to the table `PuzzleBackgroundCompileTaskRow`.
+///
+/// Implemented for [`__sdk::QueryTableAccessor`].
+pub trait puzzle_background_compile_taskQueryTableAccess {
+    #[allow(non_snake_case)]
+    /// Get a query builder for the table `PuzzleBackgroundCompileTaskRow`.
+    fn puzzle_background_compile_task(
+        &self,
+    ) -> __sdk::__query_builder::Table<PuzzleBackgroundCompileTaskRow>;
+}
+
+impl puzzle_background_compile_taskQueryTableAccess for __sdk::QueryTableAccessor {
+    fn puzzle_background_compile_task(
+        &self,
+    ) -> __sdk::__query_builder::Table<PuzzleBackgroundCompileTaskRow> {
+        __sdk::__query_builder::Table::new("puzzle_background_compile_task")
+    }
+}

server-rs/crates/spacetime-client/src/module_bindings/release_puzzle_background_compile_task_procedure.rs

@@ -0,0 +1,62 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+#![allow(unused, clippy::all)]
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+
+use super::puzzle_background_compile_task_procedure_result_type::PuzzleBackgroundCompileTaskProcedureResult;
+use super::puzzle_background_compile_task_release_input_type::PuzzleBackgroundCompileTaskReleaseInput;
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+struct ReleasePuzzleBackgroundCompileTaskArgs {
+    pub input: PuzzleBackgroundCompileTaskReleaseInput,
+}
+
+impl __sdk::InModule for ReleasePuzzleBackgroundCompileTaskArgs {
+    type Module = super::RemoteModule;
+}
+
+#[allow(non_camel_case_types)]
+/// Extension trait for access to the procedure `release_puzzle_background_compile_task`.
+///
+/// Implemented for [`super::RemoteProcedures`].
+pub trait release_puzzle_background_compile_task {
+    fn release_puzzle_background_compile_task(
+        &self,
+        input: PuzzleBackgroundCompileTaskReleaseInput,
+    ) {
+        self.release_puzzle_background_compile_task_then(input, |_, _| {});
+    }
+
+    fn release_puzzle_background_compile_task_then(
+        &self,
+        input: PuzzleBackgroundCompileTaskReleaseInput,
+
+        __callback: impl FnOnce(
+                &super::ProcedureEventContext,
+                Result<PuzzleBackgroundCompileTaskProcedureResult, __sdk::InternalError>,
+            ) + Send
+            + 'static,
+    );
+}
+
+impl release_puzzle_background_compile_task for super::RemoteProcedures {
+    fn release_puzzle_background_compile_task_then(
+        &self,
+        input: PuzzleBackgroundCompileTaskReleaseInput,
+
+        __callback: impl FnOnce(
+                &super::ProcedureEventContext,
+                Result<PuzzleBackgroundCompileTaskProcedureResult, __sdk::InternalError>,
+            ) + Send
+            + 'static,
+    ) {
+        self.imp
+            .invoke_procedure_with_callback::<_, PuzzleBackgroundCompileTaskProcedureResult>(
+                "release_puzzle_background_compile_task",
+                ReleasePuzzleBackgroundCompileTaskArgs { input },
+                __callback,
+            );
+    }
+}

server-rs/crates/spacetime-client/src/puzzle.rs

@@ -1,8 +1,10 @@
 use super::*;
 use crate::mapper::*;
+use crate::module_bindings::claim_puzzle_background_compile_task_procedure::claim_puzzle_background_compile_task;
 use crate::module_bindings::claim_puzzle_work_point_incentive_procedure::claim_puzzle_work_point_incentive;
 use crate::module_bindings::delete_puzzle_work_procedure::delete_puzzle_work;
 use crate::module_bindings::record_puzzle_work_like_procedure::record_puzzle_work_like;
+use crate::module_bindings::release_puzzle_background_compile_task_procedure::release_puzzle_background_compile_task;
 use crate::module_bindings::remix_puzzle_work_procedure::remix_puzzle_work;
 use crate::module_bindings::save_puzzle_ui_background_procedure::save_puzzle_ui_background;
 
@@ -194,6 +196,67 @@ impl SpacetimeClient {
         .await
     }
 
+    pub async fn claim_puzzle_background_compile_task(
+        &self,
+        input: PuzzleBackgroundCompileTaskClaimRecordInput,
+    ) -> Result<bool, SpacetimeClientError> {
+        let procedure_input = PuzzleBackgroundCompileTaskClaimInput {
+            task_id: input.task_id,
+            claim_id: input.claim_id,
+            session_id: input.session_id,
+            owner_user_id: input.owner_user_id,
+            claimed_at_micros: input.claimed_at_micros,
+        };
+
+        self.call_after_connect(
+            "claim_puzzle_background_compile_task",
+            move |connection, sender| {
+                connection
+                    .procedures()
+                    .claim_puzzle_background_compile_task_then(
+                        procedure_input,
+                        move |_, result| {
+                            let mapped = result
+                                .map_err(SpacetimeClientError::from_sdk_error)
+                                .and_then(map_puzzle_background_compile_task_procedure_result);
+                            send_once(&sender, mapped);
+                        },
+                    );
+            },
+        )
+        .await
+    }
+
+    pub async fn release_puzzle_background_compile_task(
+        &self,
+        input: PuzzleBackgroundCompileTaskReleaseRecordInput,
+    ) -> Result<bool, SpacetimeClientError> {
+        let procedure_input = PuzzleBackgroundCompileTaskReleaseInput {
+            task_id: input.task_id,
+            claim_id: input.claim_id,
+            session_id: input.session_id,
+            owner_user_id: input.owner_user_id,
+        };
+
+        self.call_after_connect(
+            "release_puzzle_background_compile_task",
+            move |connection, sender| {
+                connection
+                    .procedures()
+                    .release_puzzle_background_compile_task_then(
+                        procedure_input,
+                        move |_, result| {
+                            let mapped = result
+                                .map_err(SpacetimeClientError::from_sdk_error)
+                                .and_then(map_puzzle_background_compile_task_procedure_result);
+                            send_once(&sender, mapped);
+                        },
+                    );
+            },
+        )
+        .await
+    }
+
     pub async fn save_puzzle_generated_images(
         &self,
         input: PuzzleGeneratedImagesSaveRecordInput,

server-rs/crates/spacetime-module/src/migration.rs

@@ -20,8 +20,8 @@ use crate::match3d::tables::{
     match_3_d_work_profile, match3d_agent_message, match3d_agent_session, match3d_runtime_run,
 };
 use crate::puzzle::{
-    puzzle_agent_message, puzzle_agent_session, puzzle_event, puzzle_leaderboard_entry,
-    puzzle_runtime_run, puzzle_work_profile,
+    puzzle_agent_message, puzzle_agent_session, puzzle_background_compile_task, puzzle_event,
+    puzzle_leaderboard_entry, puzzle_runtime_run, puzzle_work_profile,
 };
 use crate::puzzle_clear::tables::{
     puzzle_clear_agent_session, puzzle_clear_event, puzzle_clear_runtime_run,
@@ -229,6 +229,7 @@ macro_rules! migration_tables {
             asset_entity_binding,
             asset_event,
             puzzle_agent_session,
+            puzzle_background_compile_task,
             puzzle_agent_message,
             puzzle_work_profile,
             puzzle_event,

server-rs/crates/spacetime-module/src/puzzle.rs

@@ -10,14 +10,16 @@ use module_puzzle::{
     PUZZLE_NEXT_LEVEL_MODE_SIMILAR_WORKS, PuzzleAgentMessageFinalizeInput, PuzzleAgentMessageKind,
     PuzzleAgentMessageRole, PuzzleAgentMessageSnapshot, PuzzleAgentSessionCreateInput,
     PuzzleAgentSessionGetInput, PuzzleAgentSessionProcedureResult, PuzzleAgentSessionSnapshot,
-    PuzzleAgentStage, PuzzleAnchorPack, PuzzleDraftCompileFailureInput, PuzzleDraftCompileInput,
-    PuzzleFormDraftSaveInput, PuzzleGeneratedImageCandidate, PuzzleGeneratedImagesSaveInput,
-    PuzzleLeaderboardEntry, PuzzleLeaderboardSubmitInput, PuzzlePublicationStatus,
-    PuzzlePublishInput, PuzzleRecommendedNextWork, PuzzleResultDraft, PuzzleRunDragInput,
-    PuzzleRunGetInput, PuzzleRunNextLevelInput, PuzzleRunPauseInput, PuzzleRunProcedureResult,
-    PuzzleRunPropInput, PuzzleRunSnapshot, PuzzleRunStartInput, PuzzleRunSwapInput,
-    PuzzleRuntimeLevelStatus, PuzzleSelectCoverImageInput, PuzzleUiBackgroundSaveInput,
-    PuzzleWorkDeleteInput, PuzzleWorkGetInput, PuzzleWorkLikeRecordInput as PuzzleWorkLikeInput,
+    PuzzleAgentStage, PuzzleAnchorPack, PuzzleBackgroundCompileTaskClaimInput,
+    PuzzleBackgroundCompileTaskProcedureResult, PuzzleBackgroundCompileTaskReleaseInput,
+    PuzzleDraftCompileFailureInput, PuzzleDraftCompileInput, PuzzleFormDraftSaveInput,
+    PuzzleGeneratedImageCandidate, PuzzleGeneratedImagesSaveInput, PuzzleLeaderboardEntry,
+    PuzzleLeaderboardSubmitInput, PuzzlePublicationStatus, PuzzlePublishInput,
+    PuzzleRecommendedNextWork, PuzzleResultDraft, PuzzleRunDragInput, PuzzleRunGetInput,
+    PuzzleRunNextLevelInput, PuzzleRunPauseInput, PuzzleRunProcedureResult, PuzzleRunPropInput,
+    PuzzleRunSnapshot, PuzzleRunStartInput, PuzzleRunSwapInput, PuzzleRuntimeLevelStatus,
+    PuzzleSelectCoverImageInput, PuzzleUiBackgroundSaveInput, PuzzleWorkDeleteInput,
+    PuzzleWorkGetInput, PuzzleWorkLikeRecordInput as PuzzleWorkLikeInput,
     PuzzleWorkPointIncentiveClaimInput, PuzzleWorkProcedureResult, PuzzleWorkProfile,
     PuzzleWorkRemixInput, PuzzleWorkUpsertInput, PuzzleWorksListInput, PuzzleWorksProcedureResult,
     apply_publish_overrides_to_draft, apply_selected_candidate, build_form_draft_from_seed,
@@ -38,6 +40,7 @@ use spacetimedb::{
 use crate::auth::user_account;
 
 const PUZZLE_POINT_INCENTIVE_DEFAULT_U64: u64 = 0;
+const PUZZLE_BACKGROUND_COMPILE_TASK_LEASE_MICROS: i64 = 30 * 60 * 1_000_000;
 const WORK_VISIBLE_DEFAULT: bool = true;
 
 /// 拼图 Agent session 真相表。
@@ -62,6 +65,22 @@ pub struct PuzzleAgentSessionRow {
     updated_at: Timestamp,
 }
 
+/// 拼图首图后台编译活动任务表。
+/// 中文注释：该表只保存跨 api-server 实例互斥 claim，不表达最终生成结果。
+#[spacetimedb::table(
+    accessor = puzzle_background_compile_task,
+    index(accessor = by_puzzle_background_compile_task_session_id, btree(columns = [session_id]))
+)]
+pub struct PuzzleBackgroundCompileTaskRow {
+    #[primary_key]
+    task_id: String,
+    claim_id: String,
+    session_id: String,
+    owner_user_id: String,
+    created_at: Timestamp,
+    updated_at: Timestamp,
+}
+
 /// 拼图 Agent 消息真相表。
 #[spacetimedb::table(
     accessor = puzzle_agent_message,
@@ -388,6 +407,44 @@ pub fn mark_puzzle_draft_generation_failed(
     }
 }
 
+#[spacetimedb::procedure]
+pub fn claim_puzzle_background_compile_task(
+    ctx: &mut ProcedureContext,
+    input: PuzzleBackgroundCompileTaskClaimInput,
+) -> PuzzleBackgroundCompileTaskProcedureResult {
+    match ctx.try_with_tx(|tx| claim_puzzle_background_compile_task_tx(tx, input.clone())) {
+        Ok(claimed) => PuzzleBackgroundCompileTaskProcedureResult {
+            ok: true,
+            claimed,
+            error_message: None,
+        },
+        Err(message) => PuzzleBackgroundCompileTaskProcedureResult {
+            ok: false,
+            claimed: false,
+            error_message: Some(message),
+        },
+    }
+}
+
+#[spacetimedb::procedure]
+pub fn release_puzzle_background_compile_task(
+    ctx: &mut ProcedureContext,
+    input: PuzzleBackgroundCompileTaskReleaseInput,
+) -> PuzzleBackgroundCompileTaskProcedureResult {
+    match ctx.try_with_tx(|tx| release_puzzle_background_compile_task_tx(tx, input.clone())) {
+        Ok(released) => PuzzleBackgroundCompileTaskProcedureResult {
+            ok: true,
+            claimed: released,
+            error_message: None,
+        },
+        Err(message) => PuzzleBackgroundCompileTaskProcedureResult {
+            ok: false,
+            claimed: false,
+            error_message: Some(message),
+        },
+    }
+}
+
 /// 保存拼图入口表单草稿。
 /// 中文注释：该 procedure 只更新 session 与创作中心草稿卡，不触发图片生成或发布校验。
 #[spacetimedb::procedure]
@@ -1024,6 +1081,84 @@ fn compile_puzzle_agent_draft_tx(
     )
 }
 
+fn claim_puzzle_background_compile_task_tx(
+    ctx: &TxContext,
+    input: PuzzleBackgroundCompileTaskClaimInput,
+) -> Result<bool, String> {
+    let task_id = normalize_required_puzzle_task_field(&input.task_id, "拼图后台任务 ID")?;
+    let claim_id = normalize_required_puzzle_task_field(&input.claim_id, "拼图后台任务 claim ID")?;
+    let session_id = normalize_required_puzzle_task_field(&input.session_id, "拼图 session ID")?;
+    let owner_user_id = normalize_required_puzzle_task_field(&input.owner_user_id, "拼图用户 ID")?;
+    let claimed_at = Timestamp::from_micros_since_unix_epoch(input.claimed_at_micros);
+
+    get_owned_session_row(ctx, &session_id, &owner_user_id)?;
+    if let Some(existing) = ctx
+        .db
+        .puzzle_background_compile_task()
+        .task_id()
+        .find(&task_id)
+    {
+        if !is_stale_puzzle_background_compile_task(&existing, input.claimed_at_micros) {
+            return Ok(false);
+        }
+        ctx.db
+            .puzzle_background_compile_task()
+            .task_id()
+            .delete(&task_id);
+    }
+
+    ctx.db
+        .puzzle_background_compile_task()
+        .insert(PuzzleBackgroundCompileTaskRow {
+            task_id,
+            claim_id,
+            session_id,
+            owner_user_id,
+            created_at: claimed_at,
+            updated_at: claimed_at,
+        });
+    Ok(true)
+}
+
+fn release_puzzle_background_compile_task_tx(
+    ctx: &TxContext,
+    input: PuzzleBackgroundCompileTaskReleaseInput,
+) -> Result<bool, String> {
+    let task_id = normalize_required_puzzle_task_field(&input.task_id, "拼图后台任务 ID")?;
+    let claim_id = normalize_required_puzzle_task_field(&input.claim_id, "拼图后台任务 claim ID")?;
+    let session_id = normalize_required_puzzle_task_field(&input.session_id, "拼图 session ID")?;
+    let owner_user_id = normalize_required_puzzle_task_field(&input.owner_user_id, "拼图用户 ID")?;
+
+    let Some(row) = ctx
+        .db
+        .puzzle_background_compile_task()
+        .task_id()
+        .find(&task_id)
+    else {
+        return Ok(false);
+    };
+    if row.session_id != session_id || row.owner_user_id != owner_user_id {
+        return Err("无权释放该拼图后台任务".to_string());
+    }
+    if row.claim_id != claim_id {
+        return Ok(false);
+    }
+
+    ctx.db
+        .puzzle_background_compile_task()
+        .task_id()
+        .delete(&task_id);
+    Ok(true)
+}
+
+fn is_stale_puzzle_background_compile_task(
+    row: &PuzzleBackgroundCompileTaskRow,
+    now_micros: i64,
+) -> bool {
+    now_micros.saturating_sub(row.updated_at.to_micros_since_unix_epoch())
+        >= PUZZLE_BACKGROUND_COMPILE_TASK_LEASE_MICROS
+}
+
 fn mark_puzzle_draft_generation_failed_tx(
     ctx: &TxContext,
     input: PuzzleDraftCompileFailureInput,
@@ -2950,6 +3085,14 @@ fn get_owned_session_row(
     Ok(row)
 }
 
+fn normalize_required_puzzle_task_field(value: &str, field_name: &str) -> Result<String, String> {
+    let normalized = value.trim();
+    if normalized.is_empty() {
+        return Err(format!("{field_name} 不能为空"));
+    }
+    Ok(normalized.to_string())
+}
+
 fn get_owned_run_row(
     ctx: &TxContext,
     run_id: &str,

src/services/apiClient.test.ts

@@ -66,6 +66,9 @@ describe('apiClient', () => {
       dispatchEvent: dispatchEventMock,
       localStorage: createLocalStorageMock(),
     });
+    vi.stubGlobal('crypto', {
+      randomUUID: () => '11111111-2222-3333-4444-555555555555',
+    });
     fetchMock.mockReset();
     dispatchEventMock.mockReset();
     clearStoredAccessToken({ emit: false });
@@ -121,6 +124,7 @@ describe('apiClient', () => {
         credentials: 'same-origin',
         headers: expect.objectContaining({
           Authorization: 'Bearer expired-token',
+          'x-request-id': 'web-11111111-2222-3333-4444-555555555555',
           'x-genarrative-response-envelope': 'v1',
         }),
       }),
@@ -140,6 +144,7 @@ describe('apiClient', () => {
         credentials: 'same-origin',
         headers: expect.objectContaining({
           Authorization: 'Bearer fresh-token',
+          'x-request-id': 'web-11111111-2222-3333-4444-555555555555',
         }),
       }),
     );

src/services/apiClient.ts

@@ -40,6 +40,8 @@ export type ApiRequestOptions = {
   notifyAuthStateChange?: boolean;
   // 推荐页自动加载作品这类局部后台请求失败时，只应让当前卡片报错，不应清空全局登录态。
   clearAuthOnUnauthorized?: boolean;
+  // 同一次业务请求在客户端重试时复用 request id，后端据此做计费幂等。
+  requestId?: string;
 };
 
 export const BACKGROUND_AUTH_REQUEST_OPTIONS = {
@@ -99,6 +101,22 @@ function normalizeHeaders(headers?: HeadersInit) {
   return nextHeaders;
 }
 
+function buildClientRequestId() {
+  const randomId =
+    typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function'
+      ? crypto.randomUUID()
+      : `${Date.now().toString(36)}-${Math.random().toString(36).slice(2)}`;
+  return `web-${randomId}`;
+}
+
+function resolveRequestIdHeader(headers: Record<string, string>, options: ApiRequestOptions) {
+  const explicitRequestId = options.requestId?.trim();
+  const existingRequestId = Object.entries(headers).find(
+    ([key, value]) => key.toLowerCase() === REQUEST_ID_HEADER && value.trim(),
+  )?.[1];
+  return explicitRequestId || existingRequestId || buildClientRequestId();
+}
+
 function coerceMeta(value: unknown): Partial<ApiMeta> {
   if (!isRecord(value)) {
     return {};
@@ -582,12 +600,14 @@ export async function fetchWithApiAuth(
   const retry = resolveRetryOptions(method, options.retry);
   const authFailurePolicy = resolveAuthFailurePolicy(options);
   const requestSignal = init.signal ?? undefined;
+  const requestId = resolveRequestIdHeader(normalizeHeaders(init.headers), options);
   let attempt = 0;
   let refreshAttempted = false;
 
   for (;;) {
     try {
       let requestHeaders = withAuthorizationHeaders(init.headers, options);
+      requestHeaders[REQUEST_ID_HEADER] = requestId;
       let hasAuthHeader = Boolean(
         requestHeaders.Authorization?.trim() ||
           requestHeaders.authorization?.trim(),
@@ -603,6 +623,7 @@ export async function fetchWithApiAuth(
           // 避免把后端原始 “缺少 Bearer Token” 直接暴露给业务 UI。
           await ensureStoredAccessToken();
           requestHeaders = withAuthorizationHeaders(init.headers, options);
+          requestHeaders[REQUEST_ID_HEADER] = requestId;
           hasAuthHeader = Boolean(
             requestHeaders.Authorization?.trim() ||
               requestHeaders.authorization?.trim(),