diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_delivery.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_delivery.rs
index a65bf0679..88ce1af67 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_delivery.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_delivery.rs
@@ -58,11 +58,12 @@ pub(super) async fn update_plan(
         }
         *explanation = truncate_agent_runtime_text(explanation, 1200);
     }
-    let value = serde_json::to_value(plan).map_err(|_| "direct-plan-invalid")?;
+    let value =
+        serde_json::to_value(plan).map_err(|error| format!("direct-plan-invalid：{error}"))?;
     let session = Arc::clone(session);
     tokio::task::spawn_blocking(move || session.update_plan(value))
         .await
-        .map_err(|_| "direct-plan-worker-exited")?
+        .map_err(|error| format!("direct-plan-worker-exited：{error}"))?
 }
 
 #[derive(Clone, Debug, Deserialize, Serialize)]
@@ -404,7 +405,7 @@ pub(super) async fn requires_new_web_contract(
     let kind = creation_type.map(str::to_string);
     tokio::task::spawn_blocking(move || initial_requirement_at(&root, kind.as_deref(), cli))
         .await
-        .map_err(|_| "delivery-initial-check-exited")?
+        .map_err(|error| format!("delivery-initial-check-exited：{error}"))?
 }
 
 fn mark_initial_delivered(root: &Path, ledger: &ExecutionLedger) -> Result<(), String> {
@@ -451,7 +452,7 @@ pub(super) async fn register_contract(
         let value = serde_json::to_value(contract).map_err(|_| "delivery-contract-invalid")?;
         let frozen = session.freeze_contract(value)?;
         Ok(json!({"status":"frozen","contract":frozen,"next":"只推进已登记范围；使用托管构建/验证和固定场景提供真实证据"}))
-    }).await.map_err(|_| "delivery-contract-worker-exited")?
+    }).await.map_err(|error| format!("delivery-contract-worker-exited：{error}"))?
 }
 
 fn artifact_hash(root: &Path, relative: &str) -> Result<String, String> {
@@ -467,7 +468,7 @@ fn artifact_hash(root: &Path, relative: &str) -> Result<String, String> {
     loop {
         let count = file
             .read(&mut buffer)
-            .map_err(|_| "delivery-artifact-read")?;
+            .map_err(|error| format!("delivery-artifact-read：{error}"))?;
         if count == 0 {
             break;
         }
@@ -650,7 +651,7 @@ pub(super) async fn status(root: &Path, session: &Arc<ExecutionSession>) -> Resu
     let session = Arc::clone(session);
     tokio::task::spawn_blocking(move || { let ledger = session.snapshot()?; let assessment = assess(&root,&ledger)?;
         Ok(json!({"phase":ledger.phase,"contract":ledger.contract,"plan":ledger.plan,"assessment":assessment,"writeRecoveryRequired":ledger.last_failed_write_revision.is_some(),"usedPasses":ledger.used_passes,"maxRuns":ledger.max_runs,"usedExecutionMs":ledger.used_execution_ms,"maxExecutionMs":ledger.max_execution_ms,"inFlight":ledger.active.len(),"report":ledger.terminal_report}))
-    }).await.map_err(|_| "delivery-status-worker-exited")?
+    }).await.map_err(|error| format!("delivery-status-worker-exited：{error}"))?
 }
 
 pub(super) async fn try_seal(root: &Path, session: &Arc<ExecutionSession>) -> Result<bool, String> {
@@ -667,7 +668,7 @@ pub(super) async fn try_seal(root: &Path, session: &Arc<ExecutionSession>) -> Re
         session.begin_sealing(ledger.revision)
     })
     .await
-    .map_err(|_| "delivery-seal-worker-exited")?
+    .map_err(|error| format!("delivery-seal-worker-exited：{error}"))?
 }
 
 pub(super) async fn finish_sealing(
@@ -693,7 +694,7 @@ pub(super) async fn finish_sealing(
         session.complete(report.clone())?;
         if mark_initial_delivered(&root,&ledger).is_err() { app_log!("首次交付标记未写入，后续保持更严格的新项目验收要求"); }
         Ok(Some(report))
-    }).await.map_err(|_| "delivery-finalize-worker-exited")?
+    }).await.map_err(|error| format!("delivery-finalize-worker-exited：{error}"))?
 }
 
 /// 回合末的宿主复核：返回要交付的答复，或者一个"还没完，按这份证据继续修"的要求。
@@ -722,9 +723,10 @@ pub(super) async fn review_reply(
     let review_session = Arc::clone(session);
     let review = tokio::task::spawn_blocking(move || review_session.record_delivery_review())
         .await
-        .map_err(|_| "delivery-review-worker-exited")??;
+        .map_err(|error| format!("delivery-review-worker-exited：{error}"))??;
     let assessment = status(root, session).await?;
-    let detail = serde_json::to_string(&assessment).map_err(|_| "delivery-review-invalid")?;
+    let detail = serde_json::to_string(&assessment)
+        .map_err(|error| format!("delivery-review-invalid：{error}"))?;
     if review >= ledger.max_runs {
         let missing = assessment
             .pointer("/assessment/checks")
@@ -751,7 +753,7 @@ pub(super) async fn review_reply(
         let saved = report.clone();
         tokio::task::spawn_blocking(move || session.interrupt(saved))
             .await
-            .map_err(|_| "delivery-review-worker-exited")??;
+            .map_err(|error| format!("delivery-review-worker-exited：{error}"))??;
         return Ok(Some(report));
     }
     Err(TurnError::ReviewRequired {
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_execution.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_execution.rs
index 573653eb4..b8c20cc82 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_execution.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_execution.rs
@@ -128,11 +128,11 @@ struct CodexExecutorIdentity {
 
 fn executor_digest(path: &Path) -> Result<String, String> {
     use std::io::Read;
-    let mut file =
-        File::open(path).map_err(|_| "direct-execution-executor: 无法读取已选择的执行器")?;
+    let mut file = File::open(path)
+        .map_err(|error| format!("direct-execution-executor: 无法读取已选择的执行器：{error}"))?;
     let before = file
         .metadata()
-        .map_err(|_| "direct-execution-executor: 执行器身份不可用")?;
+        .map_err(|error| format!("direct-execution-executor: 执行器身份不可用：{error}"))?;
     if !before.is_file() || before.len() > 512 * 1024 * 1024 {
         return Err("direct-execution-executor: 执行器类型或大小无效".into());
     }
@@ -142,7 +142,7 @@ fn executor_digest(path: &Path) -> Result<String, String> {
     loop {
         let read = file
             .read(&mut buffer)
-            .map_err(|_| "direct-execution-executor: 执行器读取失败")?;
+            .map_err(|error| format!("direct-execution-executor: 执行器读取失败：{error}"))?;
         if read == 0 {
             break;
         }
@@ -154,7 +154,7 @@ fn executor_digest(path: &Path) -> Result<String, String> {
     }
     let after = file
         .metadata()
-        .map_err(|_| "direct-execution-executor: 执行器身份不可用")?;
+        .map_err(|error| format!("direct-execution-executor: 执行器身份不可用：{error}"))?;
     if bytes != before.len()
         || after.len() != before.len()
         || before.modified().ok() != after.modified().ok()
@@ -446,7 +446,7 @@ pub(super) async fn begin(
         )
     })
     .await
-    .map_err(|_| "direct-execution-start: 宿主状态初始化退出")??;
+    .map_err(|error| format!("direct-execution-start: 宿主状态初始化退出：{error}"))??;
     let root = session.root.clone();
     {
         let mut registry = sessions()
@@ -515,7 +515,7 @@ pub(super) fn open_with_analytics_at(
     config.validate()?;
     let root = root
         .canonicalize()
-        .map_err(|_| "direct-execution-project: 项目不可用")?;
+        .map_err(|error| format!("direct-execution-project: 项目不可用：{error}"))?;
     if turn.is_empty() || turn.len() > 512 || request_hash.len() != 64 {
         return Err("direct-execution-identity: 回合身份无效".into());
     }
@@ -523,17 +523,17 @@ pub(super) fn open_with_analytics_at(
         return Err("direct-execution-host: 权威状态不得写入模型项目目录".into());
     }
     crate::ensure_game_creator_private_directory_tree(host, "宿主执行状态目录")
-        .map_err(|_| "direct-execution-host: 无法准备私有执行状态目录")?;
+        .map_err(|error| format!("direct-execution-host: 无法准备私有执行状态目录：{error}"))?;
     let host = host
         .canonicalize()
-        .map_err(|_| "direct-execution-host: 状态目录不可用")?;
+        .map_err(|error| format!("direct-execution-host: 状态目录不可用：{error}"))?;
     if host.starts_with(&root) {
         return Err("direct-execution-host: 权威状态不得写入模型项目目录".into());
     }
     let project_key = hash(root.to_string_lossy().as_bytes());
     let directory = host.join(&project_key);
     crate::ensure_game_creator_private_directory_tree(&directory, "宿主项目执行状态")
-        .map_err(|_| "direct-execution-host: 无法准备私有项目执行状态")?;
+        .map_err(|error| format!("direct-execution-host: 无法准备私有项目执行状态：{error}"))?;
     let key = hash(turn.as_bytes());
     let lock_path = directory.join(format!("{key}.lock"));
     if lock_path.exists() {
@@ -546,7 +546,7 @@ pub(super) fn open_with_analytics_at(
         .create(true)
         .truncate(false)
         .open(&lock_path)
-        .map_err(|_| "direct-execution-owner: 无法打开执行归属锁")?;
+        .map_err(|error| format!("direct-execution-owner: 无法打开执行归属锁：{error}"))?;
     owner
         .try_lock()
         .map_err(|_| "direct-execution-active: 同一回合仍由其他执行器持有")?;
diff --git a/docs/adr/【ADR】AGC命令错误结构化与错误报告口径-2026-10-01.md b/docs/adr/【ADR】AGC命令错误结构化与错误报告口径-2026-10-01.md
index d30d636a6..ac6ac1aab 100644
--- a/docs/adr/【ADR】AGC命令错误结构化与错误报告口径-2026-10-01.md
+++ b/docs/adr/【ADR】AGC命令错误结构化与错误报告口径-2026-10-01.md
@@ -119,6 +119,7 @@ DirectProject 已经解决过同一类问题（[`【ADR】DirectProject命令接
 - WebView 普通错误出口遇到 Tauri 的结构化对象时，优先展示 `message/detail/reason/code`，再有界序列化对象；不得把对象转成 `[object Object]` 后回落“未提供具体错误正文”。
 - Direct 工具桥图片读取和真实试玩验证证据的 OS 读取/哈希错误保留底层原因；路径越界、私有路径和安全拒绝仍使用稳定安全码。
 - `agc_read_project_context` 的安全拒绝继续只给稳定码，但受控文件打开/读取/复核的 OS 错误要附在错误码后，不能把 `file-read-failed` 当成完整原因。
+- Direct 交付复核/执行账本的 worker join、产物读取、执行器摘要和宿主目录/锁 I/O 错误也保留底层原因；稳定 delivery/direct-execution 分类码只负责分流。
 - 浏览器启动/DevTools 握手与 Codex model-catalog 子进程失败保留 stderr、退出状态、解析错误和阶段；稳定机器码仍用于分类，但不能单独成为用户可见正文。
 - Node/npm 环境探测和 Web scaffold 构建持续排空并保存有界 stdout/stderr 尾部，失败返回退出状态、超时阶段和脱敏正文；环境预检回执同时下发 `code` 与 `diagnostic`。
 - HTTP 409 只有明确包含泥点不足事实时才映射为 `paidCreditsInsufficient`；Claude Code 的普通 409 冲突保留为 `upstreamFailed`。
diff --git a/docs/project-memory/plans/【里程碑】AGC错误具体文本展示-2026-10-04.md b/docs/project-memory/plans/【里程碑】AGC错误具体文本展示-2026-10-04.md
index 2df3632d6..a8feaef46 100644
--- a/docs/project-memory/plans/【里程碑】AGC错误具体文本展示-2026-10-04.md
+++ b/docs/project-memory/plans/【里程碑】AGC错误具体文本展示-2026-10-04.md
@@ -22,6 +22,7 @@ DirectProject 回合失败在确认不是客户端内部不可归类故障时，
 - WebView 结构化对象错误保留 `message/detail/reason/code` 或有界 JSON 正文，避免 `[object Object]` 触发普通错误兜底。
 - Direct 工具桥图片与真实试玩证据读取/哈希错误保留 OS 正文，安全边界拒绝继续使用稳定码。
 - `agc_read_project_context` 保留 `file-read-failed` 等稳定码，同时在能取得时附带文件打开/读取/复核的 OS 正文。
+- Direct 交付复核和执行账本的 worker、产物读取、执行器摘要及宿主目录/锁失败保留底层原因，分类码不再单独承载正文。
 - Transport / Stream / IPC / host process / memory exhaustion 的回归测试与错误事件证据。
 
 ## 不做