diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
index 4315e5442..ba60c1c92 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs
@@ -354,11 +354,9 @@ async fn run_sidecar_turn(
     let result = match outcome {
         Ok(result) => result,
         Err(message) => {
-            let Some(reason) = timeout_reason else {
-                return Err(message);
-            };
-            // 先杀进程树：不杀的话 sidecar（连同它守护的 Claude Code CLI）会一直活着，
-            // stderr 等不到 EOF，这一轮就永远出不了终态。
+            // 所有失败都走同一条收口：先杀进程树，再以有界窗口读取 stderr。之前只有
+            // 静默超时读取 stderr，cc 的非零退出 / stdout JSON 错误 / RPC error 会丢掉
+            // sidecar 给出的真正原因，最终只剩一条 transport 通用句。
             kill_claude_code_process_tree(pid);
             let stderr_detail =
                 match tokio::time::timeout(CLAUDE_CODE_STDERR_DRAIN_TIMEOUT, stderr_task).await {
@@ -367,8 +365,23 @@ async fn run_sidecar_turn(
                 }
                 .map(|value| value.trim().chars().take(512).collect::<String>())
                 .filter(|value| !value.is_empty())
-                // 断开 stdout 之后 sidecar 自己会抛 EPIPE；那是收尾噪声，不是失败原因。
-                .filter(|value| !value.contains("EPIPE"));
+                // 断开 stdout 之后 sidecar 自己会抛 EPIPE；过滤该噪声行，但保留同一份
+                // stderr 中其它真正的 provider / Node 错误。
+                .map(|value| {
+                    value
+                        .lines()
+                        .filter(|line| !line.contains("EPIPE"))
+                        .collect::<Vec<_>>()
+                        .join(" ")
+                })
+                .filter(|value| !value.trim().is_empty());
+            let reason = timeout_reason.unwrap_or_else(|| {
+                if message.trim().is_empty() {
+                    "Claude Agent SDK sidecar 执行失败".to_string()
+                } else {
+                    message
+                }
+            });
             let detail = stderr_detail
                 .map(|value| format!("：{value}"))
                 .unwrap_or_default();
@@ -760,6 +773,15 @@ fn parse_usage(value: &serde_json::Value) -> Option<platform_llm::LlmTokenUsage>
 /// 的上游事实显示成“执行通道已断开”。这里只认结构化的状态位置（`Request rejected (N)` /
 /// `HTTP N`），其它文本继续保留为 Transport，避免凭关键词猜测。
 pub(crate) fn claude_code_failure_to_llm_error(detail: String) -> platform_llm::LlmError {
+    let normalized = detail.to_ascii_lowercase();
+    if normalized.contains("maximum number of turns")
+        || normalized.contains("max turns")
+        || normalized.contains("最大回合数")
+    {
+        return platform_llm::LlmError::InvalidRequest(format!(
+            "codex-app-server-error:session-budget-exceeded detail={detail}"
+        ));
+    }
     if let Some(status_code) = claude_code_failure_status_code(&detail) {
         return platform_llm::LlmError::Upstream {
             status_code,
@@ -780,8 +802,18 @@ pub(crate) fn claude_code_failure_to_llm_error(detail: String) -> platform_llm::
 }
 
 fn claude_code_failure_status_code(detail: &str) -> Option<u16> {
-    ["Request rejected (", "HTTP "].iter().find_map(|marker| {
-        let tail = detail.split_once(marker)?.1;
+    let normalized = detail.to_ascii_lowercase();
+    [
+        "request rejected (",
+        "http ",
+        "status ",
+        "status=",
+        "status_code=",
+        "statuscode=",
+    ]
+    .iter()
+    .find_map(|marker| {
+        let tail = normalized.split_once(marker)?.1;
         let digits = tail
             .chars()
             .take_while(|character| character.is_ascii_digit())
@@ -1600,7 +1632,12 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
     match &parsed {
         Ok(text) => direct_turn_trace(&format!("claude-parse-done chars={}", text.chars().count())),
         Err(error) => {
-            eprintln!("[agc-cc-direct] parse failed: {error}");
+            // 统一进入应用日志的精确脱敏出口；不再把原始 parse detail 直接写 stderr，避免
+            // 凭据/路径随 cc 收尾错误绕过 Runtime 诊断合同。
+            app_log!(
+                "agent.direct_codex.claude_parse_failed detail={}",
+                crate::agent::redact_agent_runtime_error(root, &error, 600)
+            );
             direct_turn_trace("claude-parse-error");
         }
     }
@@ -1712,6 +1749,31 @@ mod tests {
             claude_code_failure_to_llm_error("Claude Code 缺少最终回复".into()),
             platform_llm::LlmError::EmptyResponse
         ));
+        assert!(matches!(
+            claude_code_failure_to_llm_error(
+                "Claude Code 返回失败终态：HTTP 409 session already active".into()
+            ),
+            platform_llm::LlmError::Upstream {
+                status_code: 409,
+                ..
+            }
+        ));
+        assert!(matches!(
+            claude_code_failure_to_llm_error(
+                "Claude Agent SDK 返回错误：status_code=401 invalid token".into()
+            ),
+            platform_llm::LlmError::Upstream {
+                status_code: 401,
+                ..
+            }
+        ));
+        assert!(matches!(
+            claude_code_failure_to_llm_error(
+                "Claude Code 返回失败终态：Reached maximum number of turns (8)".into()
+            ),
+            platform_llm::LlmError::InvalidRequest(message)
+                if message.contains("codex-app-server-error:session-budget-exceeded")
+        ));
     }
 
     #[test]
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
index a1141d90e..c359772ad 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/mod.rs
@@ -344,6 +344,22 @@ fn game_creator_codex_app_server_error_kind_with_machine_detail(
         if !keys.is_empty() {
             fields.push(format!("fields={}", keys.join(",")));
         }
+        let detail = ["message", "additionalDetails"]
+            .into_iter()
+            .filter_map(|field| object.get(field).and_then(serde_json::Value::as_str))
+            .map(str::trim)
+            .filter(|value| !value.is_empty())
+            .collect::<Vec<_>>()
+            .join("；");
+        if !detail.is_empty() {
+            // 先在 app-server 投影边界做一次无根目录脱敏；终态载荷还会按项目根目录再脱敏。
+            let safe_detail = crate::agent::redact_agent_runtime_error(
+                std::path::Path::new("__agc_no_project_root__"),
+                &detail,
+                480,
+            );
+            fields.push(format!("detail={safe_detail}"));
+        }
     }
     let suffix = if fields.is_empty() {
         String::new()
@@ -369,13 +385,34 @@ fn game_creator_codex_app_server_error_http_status(
 fn game_creator_codex_app_server_connection_error(
     info: &serde_json::Value,
     field: &str,
+    error: &serde_json::Value,
 ) -> platform_llm::LlmError {
     match game_creator_codex_app_server_error_http_status(info, field) {
-        Some(401 | 403) => game_creator_codex_app_server_error_kind("unauthorized"),
-        Some(413) => game_creator_codex_app_server_error_kind("request-too-large"),
+        Some(status_code @ (401 | 403)) => {
+            let platform_llm::LlmError::InvalidRequest(message) =
+                game_creator_codex_app_server_error_kind_with_machine_detail("unauthorized", error)
+            else {
+                unreachable!("native unauthorized projection must remain InvalidRequest");
+            };
+            platform_llm::LlmError::InvalidRequest(format!("{message} detail=HTTP {status_code}"))
+        }
+        Some(413) => {
+            let platform_llm::LlmError::InvalidRequest(message) =
+                game_creator_codex_app_server_error_kind_with_machine_detail(
+                    "request-too-large",
+                    error,
+                )
+            else {
+                unreachable!("native request-too-large projection must remain InvalidRequest");
+            };
+            platform_llm::LlmError::InvalidRequest(format!("{message} detail=HTTP 413"))
+        }
         Some(status_code) => platform_llm::LlmError::Upstream {
             status_code,
-            message: "Codex app-server 连接上游失败".to_string(),
+            message: format!(
+                "Codex app-server 连接上游失败：{}",
+                game_creator_codex_app_server_error_display_detail(error)
+            ),
         },
         None => platform_llm::LlmError::Connectivity {
             attempts: 1,
@@ -422,6 +459,19 @@ fn game_creator_codex_app_server_error_detail(error: &serde_json::Value) -> Stri
         .to_ascii_lowercase()
 }
 
+fn game_creator_codex_app_server_error_display_detail(error: &serde_json::Value) -> String {
+    let Some(error) = error.as_object() else {
+        return String::new();
+    };
+    ["message", "additionalDetails", "code"]
+        .into_iter()
+        .filter_map(|field| error.get(field).and_then(serde_json::Value::as_str))
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .collect::<Vec<_>>()
+        .join("；")
+}
+
 fn game_creator_codex_app_server_error_detail_indicates_stream_requirement(
     error: &serde_json::Value,
 ) -> bool {
@@ -494,19 +544,28 @@ fn game_creator_codex_app_server_failed_turn_error(
         };
     }
     if game_creator_codex_app_server_error_detail_indicates_request_too_large(error) {
-        return game_creator_codex_app_server_error_kind("request-too-large");
+        return game_creator_codex_app_server_error_kind_with_machine_detail(
+            "request-too-large",
+            error,
+        );
     }
     if game_creator_codex_app_server_error_detail_indicates_stream_requirement(error) {
-        return game_creator_codex_app_server_error_kind("stream-required");
+        return game_creator_codex_app_server_error_kind_with_machine_detail(
+            "stream-required",
+            error,
+        );
     }
     if game_creator_codex_app_server_error_detail_indicates_timeout(error) {
         return platform_llm::LlmError::Connectivity {
             attempts: 1,
-            message: "Codex app-server 上游请求超时".to_string(),
+            message: format!(
+                "Codex app-server 上游请求超时：{}",
+                game_creator_codex_app_server_error_display_detail(error)
+            ),
         };
     }
     if game_creator_codex_app_server_error_detail_indicates_auth_failure(error) {
-        return game_creator_codex_app_server_error_kind("unauthorized");
+        return game_creator_codex_app_server_error_kind_with_machine_detail("unauthorized", error);
     }
     let Some(info) = error.get("codexErrorInfo").filter(|info| !info.is_null()) else {
         return game_creator_codex_app_server_error_kind_with_machine_detail("other", error);
@@ -514,25 +573,44 @@ fn game_creator_codex_app_server_failed_turn_error(
     if let Some(kind) = info.as_str() {
         return match kind {
             "contextWindowExceeded" => {
-                game_creator_codex_app_server_error_kind("context-window-exceeded")
+                game_creator_codex_app_server_error_kind_with_machine_detail(
+                    "context-window-exceeded",
+                    error,
+                )
             }
             "sessionBudgetExceeded" => {
-                game_creator_codex_app_server_error_kind("session-budget-exceeded")
-            }
-            "usageLimitExceeded" => {
-                game_creator_codex_app_server_error_kind("usage-limit-exceeded")
+                game_creator_codex_app_server_error_kind_with_machine_detail(
+                    "session-budget-exceeded",
+                    error,
+                )
             }
+            "usageLimitExceeded" => game_creator_codex_app_server_error_kind_with_machine_detail(
+                "usage-limit-exceeded",
+                error,
+            ),
             "serverOverloaded" | "internalServerError" => platform_llm::LlmError::Upstream {
                 status_code: 503,
-                message: "Codex app-server 上游服务暂时不可用".to_string(),
+                message: format!(
+                    "Codex app-server 上游服务暂时不可用：{}",
+                    game_creator_codex_app_server_error_display_detail(error)
+                ),
             },
-            "cyberPolicy" => game_creator_codex_app_server_error_kind("cyber-policy"),
-            "unauthorized" => game_creator_codex_app_server_error_kind("unauthorized"),
-            "badRequest" => game_creator_codex_app_server_error_kind("bad-request"),
-            "threadRollbackFailed" => {
-                game_creator_codex_app_server_error_kind("thread-rollback-failed")
+            "cyberPolicy" => {
+                game_creator_codex_app_server_error_kind_with_machine_detail("cyber-policy", error)
+            }
+            "unauthorized" => {
+                game_creator_codex_app_server_error_kind_with_machine_detail("unauthorized", error)
+            }
+            "badRequest" => {
+                game_creator_codex_app_server_error_kind_with_machine_detail("bad-request", error)
+            }
+            "threadRollbackFailed" => game_creator_codex_app_server_error_kind_with_machine_detail(
+                "thread-rollback-failed",
+                error,
+            ),
+            "sandboxError" => {
+                game_creator_codex_app_server_error_kind_with_machine_detail("sandbox-error", error)
             }
-            "sandboxError" => game_creator_codex_app_server_error_kind("sandbox-error"),
             "other" => game_creator_codex_app_server_error_kind_with_machine_detail("other", error),
             _ => game_creator_codex_app_server_error_kind_with_machine_detail("other", error),
         };
@@ -544,7 +622,7 @@ fn game_creator_codex_app_server_failed_turn_error(
         "responseTooManyFailedAttempts",
     ] {
         if info.get(field).is_some() {
-            return game_creator_codex_app_server_connection_error(info, field);
+            return game_creator_codex_app_server_connection_error(info, field, error);
         }
     }
     if info.get("activeTurnNotSteerable").is_some() {
@@ -6956,13 +7034,8 @@ mod tests {
             }
         });
         let error = game_creator_codex_app_server_failed_turn_error(&failed_turn);
-        assert_eq!(
-            error,
-            platform_llm::LlmError::InvalidRequest(
-                "codex-app-server-error:context-window-exceeded".to_string()
-            )
-        );
         let visible = error.to_string();
+        assert!(visible.starts_with("codex-app-server-error:context-window-exceeded"));
         assert!(!visible.contains(&secret));
         assert!(!visible.contains("provider.example"));
         assert!(!visible.contains("victim"));
@@ -6970,38 +7043,26 @@ mod tests {
 
     #[test]
     fn codex_app_server_failed_turn_maps_stable_categories_and_http_status() {
-        for (info, expected) in [
+        for (info, expected_prefix) in [
             (
                 serde_json::json!("usageLimitExceeded"),
-                platform_llm::LlmError::InvalidRequest(
-                    "codex-app-server-error:usage-limit-exceeded".to_string(),
-                ),
+                "codex-app-server-error:usage-limit-exceeded",
             ),
             (
                 serde_json::json!("unauthorized"),
-                platform_llm::LlmError::InvalidRequest(
-                    "codex-app-server-error:unauthorized".to_string(),
-                ),
+                "codex-app-server-error:unauthorized",
             ),
             (
                 serde_json::json!({"httpConnectionFailed":{"httpStatusCode":413}}),
-                platform_llm::LlmError::InvalidRequest(
-                    "codex-app-server-error:request-too-large".to_string(),
-                ),
+                "codex-app-server-error:request-too-large",
             ),
             (
                 serde_json::json!({"httpConnectionFailed":{"httpStatusCode":429}}),
-                platform_llm::LlmError::Upstream {
-                    status_code: 429,
-                    message: "Codex app-server 连接上游失败".to_string(),
-                },
+                "上游返回 429",
             ),
             (
                 serde_json::json!({"responseStreamDisconnected":{"httpStatusCode":null}}),
-                platform_llm::LlmError::Connectivity {
-                    attempts: 1,
-                    message: "Codex app-server 连接失败".to_string(),
-                },
+                "Codex app-server 连接失败",
             ),
         ] {
             let turn = serde_json::json!({
@@ -7012,10 +7073,8 @@ mod tests {
                     "codexErrorInfo": info
                 }
             });
-            assert_eq!(
-                game_creator_codex_app_server_failed_turn_error(&turn),
-                expected
-            );
+            let actual = game_creator_codex_app_server_failed_turn_error(&turn).to_string();
+            assert!(actual.contains(expected_prefix), "{actual}");
         }
         assert_eq!(
             game_creator_codex_app_server_failed_turn_error(
@@ -7040,12 +7099,9 @@ mod tests {
                     "codexErrorInfo": "other"
                 }
             }));
-            assert_eq!(
-                error,
-                platform_llm::LlmError::InvalidRequest(
-                    "codex-app-server-error:unauthorized".to_string()
-                )
-            );
+            assert!(error
+                .to_string()
+                .starts_with("codex-app-server-error:unauthorized"));
         }
     }
 
@@ -7065,12 +7121,9 @@ mod tests {
                     "codexErrorInfo": "other"
                 }
             }));
-            assert_eq!(
-                error,
-                platform_llm::LlmError::InvalidRequest(
-                    "codex-app-server-error:request-too-large".to_string(),
-                )
-            );
+            assert!(error
+                .to_string()
+                .starts_with("codex-app-server-error:request-too-large"));
         }
     }
 
@@ -7083,12 +7136,9 @@ mod tests {
                 "codexErrorInfo": "other"
             }
         }));
-        assert_eq!(
-            stream_error,
-            platform_llm::LlmError::InvalidRequest(
-                "codex-app-server-error:stream-required".to_string()
-            )
-        );
+        assert!(stream_error
+            .to_string()
+            .starts_with("codex-app-server-error:stream-required"));
         let timeout_error = game_creator_codex_app_server_failed_turn_error(&serde_json::json!({
             "status": "failed",
             "error": {
@@ -7096,13 +7146,12 @@ mod tests {
                 "codexErrorInfo": "other"
             }
         }));
-        assert_eq!(
-            timeout_error,
-            platform_llm::LlmError::Connectivity {
-                attempts: 1,
-                message: "Codex app-server 上游请求超时".to_string()
-            }
-        );
+        assert!(timeout_error
+            .to_string()
+            .contains("Codex app-server 上游请求超时"));
+        assert!(timeout_error
+            .to_string()
+            .contains("provider request timed out"));
     }
 
     #[test]
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/turn_error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/turn_error.rs
index 745a9c1c2..6272893d5 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/turn_error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/codex_app_server/turn_error.rs
@@ -805,7 +805,10 @@ impl TurnError {
                     native: native_kind(&detail),
                 }
             }
-            LlmError::Upstream { status_code, .. } if *status_code == 409 => {
+            LlmError::Upstream {
+                status_code,
+                message,
+            } if *status_code == 409 && is_mud_points_upstream_message(message) => {
                 ModelCallKind::PaidCreditsInsufficient
             }
             LlmError::Upstream { status_code, .. } => ModelCallKind::UpstreamFailed {
@@ -836,6 +839,15 @@ impl TurnError {
     }
 }
 
+fn is_mud_points_upstream_message(message: &str) -> bool {
+    let normalized = message.to_ascii_lowercase();
+    message.contains("泥点余额不足")
+        || message.contains("可消费泥点不足")
+        || normalized.contains("insufficient_mud_points")
+        || normalized.contains("insufficient-mud-points")
+        || normalized.contains("mud points insufficient")
+}
+
 /// 桥：深层尚未 typed 的字符串错误落进 [`TurnError::Unclassified`]。
 ///
 /// 只给"这一轮已经开始"的层用。调用级（权限、校验、并发）必须显式构造对应变体。
@@ -1361,6 +1373,27 @@ mod tests {
         assert!(!projected.is_model_repairable());
     }
 
+    #[test]
+    fn non_payment_upstream_409_keeps_the_upstream_status_and_detail() {
+        let projected = TurnError::from_model_call(&LlmError::Upstream {
+            status_code: 409,
+            message: "Claude Code 返回冲突（HTTP 409）：session already active".into(),
+        });
+        match projected {
+            TurnError::ModelCallFailed(payload) => {
+                assert_eq!(
+                    payload.kind,
+                    ModelCallKind::UpstreamFailed {
+                        status_code: 409,
+                        native: None,
+                    }
+                );
+                assert!(payload.detail.contains("session already active"));
+            }
+            other => panic!("expected upstream 409 failure, got {other:?}"),
+        }
+    }
+
     #[test]
     fn upstream_http_status_keeps_codex_style_summary_and_retry_guidance() {
         let rate_limited = TurnError::from_model_call(&LlmError::Upstream {
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/generation/prompt_context.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/generation/prompt_context.rs
index 9e7c8518e..131017a1c 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/generation/prompt_context.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/generation/prompt_context.rs
@@ -621,7 +621,6 @@ const ERROR_SENSITIVE_ASSIGNMENT_KEYS: &[&str] = &[
 ];
 
 const ERROR_REDACTED_VALUE: &str = "[redacted-secret]";
-const ERROR_REDACTED_KEY: &str = "[redacted-sensitive-field]";
 
 /// Redact an error for display in Runtime state, diagnostics, and tool
 /// results.  This intentionally does not call `sanitize_prompt_context`: the
@@ -952,14 +951,11 @@ fn redact_error_sensitive_assignments(line: &str) -> String {
         if value_start < cursor {
             break;
         }
-        // Do not retain the sensitive field name itself.  A warning may be
-        // serialized to the Agent/UI, and names such as `api_key` or
-        // `Authorization` are sensitive context even after their values have
-        // been replaced.  Preserve surrounding quotes, separators, and
-        // whitespace so JSON-ish diagnostics remain readable.
+        // 保留敏感字段名，只替换值：Authorization/api_key/token 本身是排障分类，值才是秘密。
+        // 同时保留引号、分隔符和空白，使 JSON-ish 错误仍然可读。
         let key_end = key_start + key_len;
         output.push_str(&line[cursor..key_start]);
-        output.push_str(ERROR_REDACTED_KEY);
+        output.push_str(&line[key_start..key_end]);
         output.push_str(&line[key_end..value_start]);
         let (value_end, replacement) = error_assignment_value_replacement(line, value_start);
         if value_end <= value_start {
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_error.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_error.rs
index 7e7a2e385..ca15b25c3 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_error.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_error.rs
@@ -405,9 +405,10 @@ mod tests {
         let identity = crate::sanitize_diagnostic_message(&marked[0], None);
         assert!(identity.contains("eventId=error-3-1"), "{identity}");
         assert!(identity.contains("code=tool-error"), "{identity}");
-        assert_eq!(
-            crate::sanitize_diagnostic_message(&marked[1], None),
-            "<sensitive diagnostic details redacted>"
+        let marked_detail = crate::sanitize_diagnostic_message(&marked[1], None);
+        assert!(
+            marked_detail.contains("credential rotation failed"),
+            "{marked_detail}"
         );
     }
 
diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
index ec68232d3..1776283fd 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/thread_manager/dispatch.rs
@@ -96,9 +96,8 @@ impl Drop for TurnReservation {
         if finalized_by_guard {
             // 项目侧也留一份脱敏诊断：用户在项目目录里就能看到这一轮的收场，
             // 不必只依赖 AppData 的应用日志。
-            // 字段名用 `tt`（不是 `turnToken`）：`turnToken=` 会命中应用日志的凭据标记，
-            // 整行被替换成 `<sensitive diagnostic details redacted>`，离线就只剩一个
-            // 说不出原因的 HostDropped。
+            // 保留回合定位字段；错误日志只替换敏感值，不再因字段名命中凭据标记而吞掉整行，
+            // 这样离线仍能看出 HostDropped 的发生位置。
             let failure = TurnError::turn_failed(
                 FailureStage::CodeGeneration,
                 format!(
diff --git a/apps/ai-game-creator-shell/src-tauri/src/main.rs b/apps/ai-game-creator-shell/src-tauri/src/main.rs
index d35778005..adfaa999b 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/main.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/main.rs
@@ -1712,23 +1712,11 @@ pub(crate) fn sanitize_diagnostic_message(value: &str, private_root: Option<&Pat
             sanitized = sanitized.replace(root.as_ref(), "<appdata>");
         }
     }
-    let lowercase = sanitized.to_ascii_lowercase();
-    if [
-        "authorization",
-        "bearer ",
-        "api_key",
-        "apikey",
-        "api key",
-        "x-api-key",
-        "token=",
-        "token:",
-        "credential",
-    ]
-    .iter()
-    .any(|marker| lowercase.contains(marker))
-    {
-        return "<sensitive diagnostic details redacted>".to_string();
-    }
+    // 错误日志是排障材料：只替换敏感值，不能因同一行出现 authorization/token/credential
+    // 字段就把 HTTP 状态、错误码和其它原因一起删掉。
+    // 这里没有项目根时使用一个不会存在的哨兵路径，避免把日志中的普通句点当成项目路径替换。
+    sanitized =
+        agent::redact_agent_runtime_error(Path::new("__agc_no_project_root__"), &sanitized, 2_048);
     sanitized = redact_unix_absolute_paths(&redact_windows_absolute_paths(&sanitized));
     sanitized.chars().take(2_048).collect()
 }
@@ -2058,8 +2046,13 @@ mod diagnostic_log_tests {
     fn diagnostic_message_redacts_sensitive_values_and_absolute_paths() {
         assert_eq!(
             sanitize_diagnostic_message("Authorization: Bearer secret", None),
-            "<sensitive diagnostic details redacted>"
+            "Authorization: Bearer [redacted-secret]"
         );
+        let upstream =
+            sanitize_diagnostic_message("upstream HTTP 401: invalid token; retry-after=30", None);
+        assert!(upstream.contains("HTTP 401"), "{upstream}");
+        assert!(upstream.contains("invalid token"), "{upstream}");
+        assert!(upstream.contains("retry-after=30"), "{upstream}");
         assert_eq!(
             sanitize_diagnostic_message(r"failed at C:\private\project\game.json", None),
             "failed at <absolute-path>"
diff --git a/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts b/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
index 7014d6605..01c6618fd 100644
--- a/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
+++ b/apps/ai-game-creator-shell/src/features/agent-runtime/model.ts
@@ -253,15 +253,13 @@ function directPlatformFailureDetail(message: string) {
     return null;
   }
   const lower = trimmed.toLowerCase();
-  if (
-    !(
-      lower.includes('陶泥儿美术包生成失败') ||
-      lower.includes('平台图片生成任务失败') ||
-      lower.includes('external editor') ||
-      lower.includes('透明美术图集') ||
-      lower.includes('图集切片')
-    )
-  ) {
+  if (!(
+    lower.includes('陶泥儿美术包生成失败') ||
+    lower.includes('平台图片生成任务失败') ||
+    lower.includes('external editor') ||
+    lower.includes('透明美术图集') ||
+    lower.includes('图集切片')
+  )) {
     return null;
   }
   if (
@@ -313,14 +311,12 @@ function directCodexFailureDetail(message: string) {
 
 function directRuntimeFailureDetail(message: string) {
   const trimmed = message.trim();
-  if (
-    !(
-      trimmed.startsWith('Codex 已返回，但客户端登记生成产物失败：') ||
-      trimmed.includes('陶泥儿美术包不完整，已终止代码生成') ||
-      trimmed.includes('陶泥儿规范图生成后未形成可用平台合同') ||
-      trimmed.includes('陶泥儿美术包生成返回后未形成可用的已登记平台素材合同')
-    )
-  ) {
+  if (!(
+    trimmed.startsWith('Codex 已返回，但客户端登记生成产物失败：') ||
+    trimmed.includes('陶泥儿美术包不完整，已终止代码生成') ||
+    trimmed.includes('陶泥儿规范图生成后未形成可用平台合同') ||
+    trimmed.includes('陶泥儿美术包生成返回后未形成可用的已登记平台素材合同')
+  )) {
     return null;
   }
   if (
@@ -442,10 +438,10 @@ export function projectRuntimeVisibleError(
     normalized.includes('network') ||
     normalized.includes('tls')
   ) {
-    return `${subject} 服务连接失败，请稍后重试`;
+    return `${subject} 服务连接失败，请稍后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (normalized.includes('timeout') || normalized.includes('超时')) {
-    return `${subject} 响应超时，请稍后重试`;
+    return `${subject} 响应超时，请稍后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('unauthorized') ||
@@ -453,7 +449,7 @@ export function projectRuntimeVisibleError(
     normalized.includes('401') ||
     normalized.includes('鉴权')
   ) {
-    return `${subject} 鉴权失败，请检查运行时配置`;
+    return `${subject} 鉴权失败，请检查运行时配置${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('rate limit') ||
@@ -462,7 +458,7 @@ export function projectRuntimeVisibleError(
     normalized.includes('额度') ||
     normalized.includes('限流')
   ) {
-    return `${subject} 服务繁忙，请稍后重试`;
+    return `${subject} 服务繁忙，请稍后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('needs-reconciliation') ||
@@ -470,14 +466,14 @@ export function projectRuntimeVisibleError(
     normalized.includes('终态未知') ||
     normalized.includes('需要人工核对')
   ) {
-    return `${subject} 运行状态需要核对，请打开运行详情后重试`;
+    return `${subject} 运行状态需要核对，请打开运行详情后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('budget-exhausted') ||
     normalized.includes('预算耗尽') ||
     normalized.includes('预算已耗尽')
   ) {
-    return `${subject} 本轮预算已耗尽，请缩小任务范围后重试`;
+    return `${subject} 本轮预算已耗尽，请缩小任务范围后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('missing expected artifact') ||
@@ -485,7 +481,7 @@ export function projectRuntimeVisibleError(
     normalized.includes('缺少预期产物') ||
     normalized.includes('缺少 expected artifact')
   ) {
-    return `${subject} 未生成要求的产物，请查看任务要求后重试`;
+    return `${subject} 未生成要求的产物，请查看任务要求后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('verification') ||
@@ -494,7 +490,7 @@ export function projectRuntimeVisibleError(
     normalized.includes('验证未通过') ||
     normalized.includes('验证失败')
   ) {
-    return `${subject} 项目验证未通过，请查看运行详情并修复后重试`;
+    return `${subject} 项目验证未通过，请查看运行详情并修复后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('policy') ||
@@ -503,7 +499,7 @@ export function projectRuntimeVisibleError(
     normalized.includes('禁止') ||
     normalized.includes('不允许')
   ) {
-    return `${subject} 被项目权限或安全策略阻止，请检查审批配置`;
+    return `${subject} 被项目权限或安全策略阻止，请检查审批配置${runtimeFailureDetailSuffix(message)}`;
   }
   if (
     normalized.includes('落盘失败') ||
@@ -515,19 +511,18 @@ export function projectRuntimeVisibleError(
     normalized.includes('未确认历史完整落盘') ||
     normalized.includes('写入本项目对话历史失败')
   ) {
-    return `${subject} 保存运行记录失败，请检查项目目录后重试`;
+    return `${subject} 保存运行记录失败，请检查项目目录后重试${runtimeFailureDetailSuffix(message)}`;
   }
-  // 宿主 `Display` 的其余事实句：它们不含上面任何关键字，**不加模式就只会看到最后那句通用文案**。
-  // 这里只认宿主写死的句首短语，不回落原文——原文里带 `exitStatus=` / `stderrClass=` 这类内部字段
-  // （`TransportClosed` 就是这种）。
+  // 宿主 `Display` 的其余事实句：优先识别宿主写死的句首短语；其余错误也保留精确脱敏正文，
+  // 避免 IPC/进程/操作系统错误只剩一条通用句。
   if (visibleMessage.includes('执行通道已断开')) {
-    return `${subject} 服务连接已断开，请稍后重试`;
+    return `${subject} 服务连接已断开，请稍后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (visibleMessage.includes('等待模型回合结束达到硬上限')) {
-    return `${subject} 响应超时，请稍后重试`;
+    return `${subject} 响应超时，请稍后重试${runtimeFailureDetailSuffix(message)}`;
   }
   if (visibleMessage.includes('宿主任务提前结束')) {
-    return `${subject} 本轮执行已中断，请重试`;
+    return `${subject} 本轮执行已中断，请重试${runtimeFailureDetailSuffix(message)}`;
   }
   const containsInternalDiagnostics =
     normalized.includes('agentllm.') ||
@@ -556,7 +551,44 @@ export function projectRuntimeVisibleError(
   ) {
     return visibleMessage;
   }
-  return `${subject} 执行失败，请稍后重试`;
+  const safeDetail = runtimeFailureDetail(message);
+  return safeDetail
+    ? `${subject} 执行失败${safeDetail}`
+    : `${subject} 执行失败，请稍后重试`;
+}
+
+/** 精确脱敏普通 Tauri/IPC/网络错误：保留错误码与正文，只替换敏感值。 */
+function runtimeFailureDetail(value: string) {
+  const trimmed = value.trim();
+  if (!trimmed) return null;
+  const safe = trimmed
+    .replace(
+      /<redacted-url>|<redacted-secret>|<absolute-path>|\$PROJECT_ROOT/giu,
+      '[已隐藏信息]',
+    )
+    .replace(/\[redacted-sensitive-field\]/giu, '[已隐藏字段]')
+    .replace(/\[redacted-config\]/giu, '[已隐藏配置]')
+    .replace(/https?:\/\/[^\s"'<>]+/giu, '[已隐藏链接]')
+    .replace(
+      /(?:[A-Z]:\\|\\\\|\/(?:Users|home|var|tmp|private)\/)[^\s"'<>]+/giu,
+      '[已隐藏路径]',
+    )
+    .replace(
+      /((?:proxy-authorization|authorization|set-cookie|cookie|access[_ -]?token|refresh[_ -]?token|api[_ -]?key|apikey|client[_ -]?secret|private[_ -]?key|secret[_ -]?key|password|token|secret|bearer)\s*[:=]\s*)(?:Bearer\s+)?(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|[^\s,;，；&}\]]+)/giu,
+      '$1[已隐藏凭据]',
+    )
+    .replace(/(?:^|\s)kind=[a-z0-9_-]+/giu, ' ')
+    .replace(/(?:^|\s)(?:fingerprint|sha256)=[^\s]+/giu, ' ')
+    .replace(/\s+chars=\d+/giu, ' ')
+    .replace(/\s+/gu, ' ')
+    .trim()
+    .slice(0, 420);
+  if (!safe || safe === trimmed) return safe ? `：${safe}` : '';
+  return `：${safe}`;
+}
+
+function runtimeFailureDetailSuffix(value: string) {
+  return runtimeFailureDetail(value);
 }
 
 export function taskRowsFromManifest(
diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnEnqueueFailure.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnEnqueueFailure.ts
index 262595b47..b27087055 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnEnqueueFailure.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnEnqueueFailure.ts
@@ -1,6 +1,7 @@
 import { expectNever } from '../../../../app/expectNever';
 import type { TauriInvoke } from '../../../../app/types';
 import type { EnqueueError } from '../generated/EnqueueError';
+import { visibleDirectFailureDetail } from './directTurnFailure';
 
 /** 用户可见文案的主语：与既有运行错误横幅同一份口径。 */
 const DIRECT_TURN_SUBJECT = '陶泥儿智能创作';
@@ -95,11 +96,10 @@ export function enqueueFailureNotice(failure: EnqueueError): string | null {
 }
 
 /**
- * **宿主 / 环境事实**类入队失败在聊天区里的固定句；认不出形状时返回 `null`。
+ * **宿主 / 环境事实**类入队失败在聊天区里的分类句，并附上精确脱敏 detail；认不出形状时返回 `null`。
  *
- * 这类失败的 `detail` 是宿主原文（`stage=` / `code=` / 路径这类机器字段都在里面），只用于
- * `.agent/runtime/errors` 与诊断，**不上屏**；所以这里只按变体给一句用户能看懂的话，不回落
- * 任何字段。
+ * 这类失败的 `detail` 是宿主原文；前端只替换凭据值、URL 和路径，保留 `stage=` / `code=` /
+ * 错误码等排障字段，不因机器字段存在而丢失整条错误。
  *
  * `null` 只给"根本不是这份结构化载荷"的抛出（Tauri / 宿主缺陷，或未来宿主新增的变体）：
  * 那时说不出用户改哪一处能变好，调用方只上报 + 横幅，不写聊天。
@@ -109,9 +109,13 @@ export function enqueueSystemFailureNoticeText(
 ): string | null {
   switch (failure.type) {
     case 'environmentNotReady':
-      return `${DIRECT_TURN_SUBJECT}：当前环境未就绪，这一轮没有开始；请检查本机运行环境后重试`;
+      return visibleDirectFailureDetail(failure.detail)
+        ? `${DIRECT_TURN_SUBJECT}：当前环境未就绪，这一轮没有开始；请检查本机运行环境后重试：${visibleDirectFailureDetail(failure.detail)}`
+        : `${DIRECT_TURN_SUBJECT}：当前环境未就绪，这一轮没有开始；请检查本机运行环境后重试`;
     case 'hostStateUnavailable':
-      return `${DIRECT_TURN_SUBJECT}：宿主执行状态不可用，这一轮没有开始；请稍后重试`;
+      return visibleDirectFailureDetail(failure.detail)
+        ? `${DIRECT_TURN_SUBJECT}：宿主执行状态不可用，这一轮没有开始；请稍后重试：${visibleDirectFailureDetail(failure.detail)}`
+        : `${DIRECT_TURN_SUBJECT}：宿主执行状态不可用，这一轮没有开始；请稍后重试`;
     // 业务变体由 `enqueueFailureNotice` 认领，这里不重复给句；认不出形状时同理。
     // 穷尽性由那个函数的 `default: expectNever` 保证——新增变体时那边会先编译失败。
     default:
diff --git a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
index 93b3ba4c2..19156bf92 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/chat/conversation/directTurnFailure.ts
@@ -9,9 +9,8 @@
  * 为什么值得单独一个文件：前两条是**跨侧约定**——身份要和前端自己造的说明（终止 / announce）
  * 区分开又保持可预期；文案要按变体逐条写死，不能靠对宿主文本做子串匹配。
  *
- * 载荷里的 `detail` / `cause` / `diagnostic` 是**宿主原文**（走 `stage=` / `exitStatus=` /
- * 路径这类机器字段），只用于诊断与分流、**不上屏**：这里只读 `type` / `stage` / `deadline` /
- * `kind` 这些枚举字段。
+ * 载荷里的 `detail` / `cause` / `diagnostic` 是宿主原文；经过精确脱敏后，用户可见错误会保留其中
+ * 的 HTTP 状态、错误码和可行动原因。凭据值、URL、绝对路径和私钥内容不上屏。
  */
 
 import { expectNever } from '../../../../app/expectNever';
@@ -27,6 +26,74 @@ const DIRECT_TURN_SUBJECT = '陶泥儿智能创作';
 /** 没有本轮开口条目身份时的兜底展示身份前缀（正常路径不会用到）。 */
 const DIRECT_TURN_FAILURE_FALLBACK_ITEM_ID = 'direct-thread-turn-failure';
 
+/**
+ * 用户可见错误正文的上限。分类前缀必须保留，正文只做有界截断，不能因为命中敏感字段
+ * 就把整条错误丢掉：HTTP 状态、操作系统错误码和上游的可行动说明仍然有排障价值。
+ */
+const DIRECT_VISIBLE_FAILURE_DETAIL_MAX_CHARS = 420;
+
+/**
+ * Rust 侧已经按同一规则脱敏，但跨 IPC 的载荷不能被当成可信输入；这里做最后一道精确收口。
+ * 只替换凭据值、URL 和绝对路径，保留错误字段名、HTTP 状态、错误码和其它上下文。
+ */
+export function visibleDirectFailureDetail(
+  detail: string | null | undefined,
+): string | null {
+  const text = typeof detail === 'string' ? detail.trim() : '';
+  if (!text) return null;
+  const safe = text
+    .replace(/<redacted-url>/gi, '[已隐藏链接]')
+    .replace(/<absolute-path>|\$PROJECT_ROOT/gi, '[已隐藏路径]')
+    .replace(/\[redacted-secret\]|<redacted-secret>/gi, '[已隐藏凭据]')
+    .replace(/\[redacted-sensitive-field\]/gi, '[已隐藏字段]')
+    .replace(/\[redacted-config\]/gi, '[已隐藏配置]')
+    .replace(/\[redacted sensitive context\]/gi, '[已隐藏敏感信息]')
+    .replace(/https?:\/\/[^\s"'<>]+/giu, '[已隐藏链接]')
+    .replace(
+      /(?:[A-Z]:\\|\\\\|\/(?:Users|home|var|tmp|private)\/)[^\s"'<>]+/giu,
+      '[已隐藏路径]',
+    )
+    .replace(
+      /((?:proxy-authorization|authorization|set-cookie|cookie|access[_ -]?token|refresh[_ -]?token|api[_ -]?key|apikey|client[_ -]?secret|private[_ -]?key|secret[_ -]?key|password|token|secret|bearer)\s*[:=]\s*)(?:Bearer\s+)?(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|[^\s,;，；&}\]]+)/giu,
+      '$1[已隐藏凭据]',
+    )
+    .replace(/\s+/gu, ' ')
+    .trim();
+  if (!safe) return null;
+  return safe.length > DIRECT_VISIBLE_FAILURE_DETAIL_MAX_CHARS
+    ? `${safe.slice(0, DIRECT_VISIBLE_FAILURE_DETAIL_MAX_CHARS)}…`
+    : safe;
+}
+
+function withVisibleFailureDetail(
+  message: string,
+  detail: string | null | undefined,
+) {
+  const safeDetail = visibleDirectFailureDetail(detail);
+  return safeDetail ? `${message}：${safeDetail}` : message;
+}
+
+function stripUpstreamPrefix(
+  detail: string | null | undefined,
+  statusCode: number,
+) {
+  const safeDetail = visibleDirectFailureDetail(detail);
+  if (!safeDetail) return null;
+  return safeDetail
+    .replace(
+      new RegExp(`^(?:LLM\\s+)?上游返回\\s+${statusCode}\\s*[：:]\\s*`, 'u'),
+      '',
+    )
+    .replace(
+      new RegExp(
+        `^(?:LLM\\s+)?上游\\s+HTTP\\s+${statusCode}\\s*[：:]\\s*`,
+        'iu',
+      ),
+      '',
+    )
+    .trim();
+}
+
 /** 交付阶段标签：与诊断收口文案同一份标签，只有"回合失败"才带。 */
 const DIRECT_FAILURE_STAGE_LABELS: Record<FailureStage, string> = {
   'art-preparation': '平台资源准备失败',
@@ -76,34 +143,67 @@ function directNativeKindText(kind: NativeKind): string {
 }
 
 /** 模型调用失败的可见说明：有原生分类看原生分类，没有就看平台层那一层的分类。 */
-function directModelCallText(kind: ModelCallKind | null | undefined): string {
+function directModelCallText(
+  kind: ModelCallKind | null | undefined,
+  detail: string | null | undefined,
+): string {
   // 载荷跨 IPC 没有运行时校验：`kind` 缺失时按"没有分类"兜底，别让整条事件订阅在这一步抛错。
   if (!kind) {
     return '智能服务执行失败，请稍后重试';
   }
   switch (kind.type) {
     case 'responseTimedOut':
-      return '等待模型回执超时，本轮未完成；请稍后重试';
-    case 'connectionFailed':
-      return '执行通道未能建立或已断开，本轮未完成；请重试，若持续失败请检查项目诊断';
-    case 'transportBroken':
-    case 'streamUnavailable':
-      return '执行通道中断，本轮未完成；请重试，若持续失败请检查项目诊断';
-    case 'requestRejected':
-      return kind.native
-        ? directNativeKindText(kind.native)
-        : '智能创作请求无效，请稍后重试';
-    case 'upstreamFailed':
-      return (
-        (kind.native ? directNativeKindText(kind.native) : null) ??
-        directUpstreamStatusText(kind.statusCode)
+      return withVisibleFailureDetail(
+        `等待模型回执超时（已尝试 ${kind.attempts} 次），本轮未完成；请稍后重试`,
+        detail,
       );
+    case 'connectionFailed':
+      return withVisibleFailureDetail(
+        '执行通道连接失败，本轮未完成；请重试，若持续失败请检查项目诊断',
+        detail,
+      );
+    case 'transportBroken':
+      return withVisibleFailureDetail(
+        '执行通道中断，本轮未完成；请重试，若持续失败请检查项目诊断',
+        detail,
+      );
+    case 'streamUnavailable':
+      return withVisibleFailureDetail(
+        '流式响应协议不可用，本轮未完成；请检查项目诊断后重试',
+        detail,
+      );
+    case 'requestRejected':
+      return withVisibleFailureDetail(
+        kind.native
+          ? directNativeKindText(kind.native)
+          : '智能创作请求无效，请稍后重试',
+        detail,
+      );
+    case 'upstreamFailed': {
+      const nativeMessage = kind.native
+        ? directNativeKindText(kind.native)
+        : null;
+      const statusMessage = directUpstreamStatusText(kind.statusCode);
+      return withVisibleFailureDetail(
+        nativeMessage ?? statusMessage,
+        nativeMessage ? detail : stripUpstreamPrefix(detail, kind.statusCode),
+      );
+    }
     case 'paidCreditsInsufficient':
-      return '泥点余额不足，本轮游戏生成已中断。请充值后发送“继续”，系统会从当前项目进度接着完成。';
+      return withVisibleFailureDetail(
+        '泥点余额不足，本轮游戏生成已中断。请充值后发送“继续”，系统会从当前项目进度接着完成。',
+        detail,
+      );
     case 'emptyResponse':
-      return '模型未返回内容，请重试；如持续失败请检查项目诊断';
+      return withVisibleFailureDetail(
+        '模型未返回内容，请重试；如持续失败请检查项目诊断',
+        detail,
+      );
     case 'payloadInvalid':
-      return '模型回执无法解析，请重试；如持续失败请检查项目诊断';
+      return withVisibleFailureDetail(
+        '模型回执无法解析，请重试；如持续失败请检查项目诊断',
+        detail,
+      );
     default: {
       expectNever(kind);
       return '智能服务执行失败，请稍后重试';
@@ -169,40 +269,64 @@ export function directTurnFailureItemId(
  * 失败原因的可见文案：按载荷变体逐条写死，不再把宿主原文送进字符串映射。
  *
  * 改造前这里读的是宿主 `Display` 生成的整句原因，再靠 `projectRuntimeVisibleError` 做子串匹配；
- * 宿主换一句事实句而前端没跟着加模式时，用户拿到的就是通用兜底。现在载荷直接给 typed 事实，
- * 文案由前端在这里按变体拼：**新增变体 / 新增原生分类时这里漏一条，`expectNever` 会让编译失败**。
+ * 宿主换一句事实句而前端没跟着加模式时，分类仍来自 typed 载荷，安全 detail 继续保留具体原因。
+ * **新增变体 / 新增原生分类时这里漏一条，`expectNever` 会让编译失败**。
  *
- * `detail` / `cause` / `diagnostic` 一律不上屏：它们是宿主原文，可能带 `exitStatus=` /
- * `stderrClass=` 这类内部字段，只用于 `.agent/runtime/errors` 与诊断。
+ * `detail` / `cause` / `diagnostic` 先经过精确脱敏再展示：`exitStatus=` / `stderrClass=`、HTTP
+ * 状态和操作系统错误码等排障字段保留，凭据值、URL 和绝对路径替换为占位符。
  */
 export function directTurnFailureNoticeText(failure: TurnFailure): string {
   switch (failure.type) {
     case 'projectRootUnanchored':
-      return `${DIRECT_TURN_SUBJECT}：无法确定项目目录，本轮未能开始；请检查项目路径后重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT}：无法确定项目目录，本轮未能开始；请检查项目路径后重试`,
+        failure.cause,
+      );
     case 'environmentNotReady':
-      return `${DIRECT_TURN_SUBJECT}：当前环境未就绪，本轮未完成；请检查本机运行环境后重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT}：当前环境未就绪，本轮未完成；请检查本机运行环境后重试`,
+        failure.detail,
+      );
     case 'hostStateUnavailable':
-      return `${DIRECT_TURN_SUBJECT}：宿主执行状态不可用，本轮未完成；请稍后重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT}：宿主执行状态不可用，本轮未完成；请稍后重试`,
+        failure.detail,
+      );
     case 'modelCallFailed':
-      return `${DIRECT_TURN_SUBJECT} ${directModelCallText(failure.kind)}`;
+      return `${DIRECT_TURN_SUBJECT} ${directModelCallText(failure.kind, failure.detail)}`;
     case 'transportClosed':
-      return `${DIRECT_TURN_SUBJECT} 服务连接已断开，请稍后重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT} 服务连接已断开，请稍后重试`,
+        failure.diagnostic,
+      );
     case 'timedOut':
       return `${DIRECT_TURN_SUBJECT} ${directTurnDeadlineText(failure.deadline)}`;
     case 'turnInterrupted':
-      return `${DIRECT_TURN_SUBJECT} 本轮执行被中断，请重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT} 本轮执行被中断，请重试`,
+        failure.detail,
+      );
     case 'superErrorFromStringPlusStage': {
       // 载荷跨 IPC 没有运行时校验：stage 缺失或是更新后端新增的取值时查不到标签，
       // 不能把 `undefined` 拼进用户可见文案，回落到通用句。
       const stageLabel = DIRECT_FAILURE_STAGE_LABELS[failure.stage];
       return stageLabel
-        ? `${DIRECT_TURN_SUBJECT}：${stageLabel}，请检查项目诊断后重试`
-        : `${DIRECT_TURN_SUBJECT} 执行失败，请稍后重试`;
+        ? withVisibleFailureDetail(
+            `${DIRECT_TURN_SUBJECT}：${stageLabel}，请检查项目诊断后重试`,
+            failure.detail,
+          )
+        : withVisibleFailureDetail(
+            `${DIRECT_TURN_SUBJECT} 执行失败，请稍后重试`,
+            failure.detail,
+          );
     }
     case 'unclassified':
-      return `${DIRECT_TURN_SUBJECT} 执行失败，请稍后重试`;
+      return withVisibleFailureDetail(
+        `${DIRECT_TURN_SUBJECT} 执行失败，请稍后重试`,
+        failure.detail,
+      );
     case 'hostDropped':
-      return '陶泥儿回合的宿主任务提前结束（崩溃或任务被取消），本轮已按失败收口，请重试。';
+      return '陶泥儿回合的宿主任务提前结束（崩溃或任务被取消），没有收到更具体的错误回执；本轮已按失败收口，请检查应用日志后再重试。';
     default: {
       expectNever(failure);
       // 结构化映射外（未来宿主的新变体）：给一句通用话，绝不能把原文回落给用户。
diff --git a/apps/ai-game-creator-shell/tests/directTurnFailure.test.ts b/apps/ai-game-creator-shell/tests/directTurnFailure.test.ts
index 2eb77fcc3..4d522d4ee 100644
--- a/apps/ai-game-creator-shell/tests/directTurnFailure.test.ts
+++ b/apps/ai-game-creator-shell/tests/directTurnFailure.test.ts
@@ -31,4 +31,66 @@ describe('DirectProject 上游失败文案', () => {
     expect(text).toContain('模型上下文已超限');
     expect(text).not.toContain('HTTP 429');
   });
+
+  it('保留上游正文，同时只替换凭据值、链接和本地路径', () => {
+    const text = directTurnFailureNoticeText({
+      type: 'modelCallFailed',
+      kind: { type: 'upstreamFailed', statusCode: 502, native: null },
+      detail:
+        'LLM 上游返回 502：upstream overloaded；authorization=Bearer provider-secret；请查看 C:\\Users\\demo\\game；https://provider.example/private',
+    });
+
+    expect(text).toContain('HTTP 502');
+    expect(text).toContain('upstream overloaded');
+    expect(text).toContain('[已隐藏凭据]');
+    expect(text).not.toContain('provider-secret');
+    expect(text).not.toContain('provider.example');
+    expect(text).not.toContain('C:\\Users\\demo');
+  });
+
+  it.each([
+    ['connectionFailed', 'connect ECONNRESET 127.0.0.1:3080'],
+    ['transportBroken', 'IPC write failed: broken pipe；osError=EPIPE'],
+    [
+      'streamUnavailable',
+      'stream tool_calls declared but no tool slot was received',
+    ],
+  ] as const)('显示 %s 的真实 detail，而不是通用中断句', (kind, detail) => {
+    const text = directTurnFailureNoticeText({
+      type: 'modelCallFailed',
+      kind:
+        kind === 'connectionFailed'
+          ? { type: 'connectionFailed', attempts: 3 }
+          : kind === 'transportBroken'
+            ? { type: 'transportBroken' }
+            : { type: 'streamUnavailable' },
+      detail,
+    });
+
+    expect(text).toContain(detail);
+    expect(text).not.toBe(
+      '陶泥儿智能创作 执行通道中断，本轮未完成；请重试，若持续失败请检查项目诊断',
+    );
+  });
+
+  it('保留内存不足和 IPC 错误文本', () => {
+    const text = directTurnFailureNoticeText({
+      type: 'transportClosed',
+      diagnostic:
+        'IPC channel closed: out of memory (ENOMEM) while reading app-server response',
+    });
+
+    expect(text).toContain('out of memory (ENOMEM)');
+    expect(text).toContain('IPC channel closed');
+  });
+
+  it('环境错误保留可行动的宿主 detail', () => {
+    const text = directTurnFailureNoticeText({
+      type: 'environmentNotReady',
+      detail: 'Codex app-server 启动失败：spawn ENOENT；Node runtime not found',
+    });
+
+    expect(text).toContain('spawn ENOENT');
+    expect(text).toContain('Node runtime not found');
+  });
 });
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 83fa95574..b09bfb23d 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
@@ -101,6 +101,15 @@ DirectProject 已经解决过同一类问题（[`【ADR】DirectProject命令接
 默认选中快照中的全部事件、只由通知中的「查看并报告」打开、poisoned 快照用 fallback 等承诺保持不变；
 本次只保证"不该进池的东西不再进池"。
 
+### 5. DirectProject 失败正文按精确脱敏展示（2026-10-04）
+
+- `turn.completed.failure` 中的 `detail` / `diagnostic` 不再一律隐藏。前端按 typed 变体展示安全正文，保留 HTTP 状态、错误码、IPC/stdio、操作系统错误（例如 `EPIPE`、`ENOMEM`、`ENOENT`）和上游可行动说明。
+- 脱敏只替换敏感值、完整 URL、绝对路径和私钥内容；字段名（例如 `Authorization`、`token`、`api_key`）保留，便于判断错误类别。原始凭据值不进入用户文本、应用日志或项目诊断。
+- 上游 app-server 映射保留 `message` / `additionalDetails` 的脱敏摘要；因此 401/403/408/429/413/5xx 等状态不会因为分类为 transport 或 native 而丢失正文。
+- Claude Code（cc）侧车的非零退出、RPC `error`、stdout JSON/UTF-8 解析失败、stderr 和静默超时也走同一映射；侧车 stderr 只在有界收口窗口内读取并进入同一脱敏 detail，不再只写裸 `eprintln!`。
+- 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`。
+- 真正没有可读事实的 `hostDropped` 仍显示宿主任务提前结束，并明确说明只能继续查应用日志；它不再冒充具体网络错误。
+
 ## 后果与边界
 
 - auth 三命令（`login_client_with_password`、`login_client_with_phone_code`、`send_client_phone_login_code`）
diff --git a/docs/project-memory/plans/【实施计划】AGC错误具体文本展示-2026-10-04.md b/docs/project-memory/plans/【实施计划】AGC错误具体文本展示-2026-10-04.md
new file mode 100644
index 000000000..1bb203d61
--- /dev/null
+++ b/docs/project-memory/plans/【实施计划】AGC错误具体文本展示-2026-10-04.md
@@ -0,0 +1,34 @@
+# AGC 错误具体文本展示实施计划
+
+Version: 1.0
+Status: implemented-awaiting-runtime-acceptance
+Date: 2026-10-04
+Parent Milestone: `【里程碑】AGC错误具体文本展示-2026-10-04.md`
+
+## 修改边界
+
+1. 在前端回合失败映射中新增统一的安全 detail 投影，按 typed variant 保留 HTTP 状态、错误分类和脱敏文本。
+2. 对 `ModelCallKind`、`TransportClosed`、`TurnInterrupted`、阶段失败和 `Unclassified` 使用各自载荷，不再无条件返回通用文案。
+3. 检查并补强 Rust 错误脱敏测试，确保敏感值替换而不是整行删除。
+4. 补充 upstream、transport、stream、IPC、内存不足与 HostDropped 边界测试。
+5. 更新 ADR 的当前行为口径。
+
+## 实现顺序
+
+先锁定脱敏输入输出用例，再实现前端可见文案；随后补 Rust 映射/诊断测试，最后运行类型、编码和差异检查。
+
+## 风险与回滚
+
+- 风险：直接展示未经精确脱敏的 provider detail 会泄露凭据或项目路径；前端和 Rust 双重检查，发现敏感 assignment 时替换值，不删除整条错误。
+- 风险：错误文本过长遮住分类；保留分类前缀并将 detail 限制在有界字符数。
+- 回滚：恢复 `directTurnFailureNoticeText` 的分类文案，保留 typed detail 和诊断落盘，不改协议。
+
+## 验证结果
+
+- 前端 DirectProject 错误展示：15 passed。
+- AGC shell TypeScript 类型检查：通过。
+- Rust app-server 上游 detail 映射：6 passed。
+- CC sidecar 状态码/超时映射与非支付 409 回归通过；侧车非零退出、RPC error、解析失败统一补充有界 stderr detail。
+- 真实 AGC dev smoke 复现并定位 `Reached maximum number of turns (8)` → `transport-closed`；修复后客户端已热重编译重启，未再次触发付费 Provider 请求。
+- Rust 应用日志/启动诊断精确脱敏回归：通过。
+- 真实 Provider、IPC 断链和内存压力尚未执行。
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
new file mode 100644
index 000000000..fb6312945
--- /dev/null
+++ b/docs/project-memory/plans/【里程碑】AGC错误具体文本展示-2026-10-04.md
@@ -0,0 +1,40 @@
+# AGC 错误具体文本展示
+
+Version: 1.0
+Status: implemented-awaiting-runtime-acceptance
+Date: 2026-10-04
+Parent Spec: `docs/adr/【ADR】AGC命令错误结构化与错误报告口径-2026-10-01.md`
+
+## 目标
+
+DirectProject 回合失败在确认不是客户端内部不可归类故障时，向用户显示可行动的脱敏事实：上游 HTTP 状态、上游返回文本、网络/IPC/进程传输原因、流协议错误、内存不足等操作系统错误。保留机器字段用于诊断，但不再用通用“执行通道中断”覆盖可识别原因。
+
+## 范围
+
+- `turn.completed.failure` 的前端展示：按 typed 变体显示分类、状态码和脱敏后的 `detail` / `diagnostic`。
+- Rust 侧错误文本脱敏：只替换敏感值、URL、绝对路径和私钥内容，保留 HTTP 状态、错误码、字段名和可行动描述。
+- Transport / Stream / IPC / host process / memory exhaustion 的回归测试与错误事件证据。
+
+## 不做
+
+- 不把 access token、Cookie、API Key、私钥、完整 URL 查询参数、绝对路径原文显示给用户。
+- 不改变上游协议、重试预算、计费和项目写入安全边界。
+- 无法获得任何事实的 `hostDropped` 仍保留为客户端宿主兜底，并明确说明“未收到更具体回执”。
+
+## 验收标准
+
+1. HTTP 401/403/408/429/5xx 显示状态码与脱敏后的上游错误文本。
+2. `connectionFailed`、`transportBroken`、`streamUnavailable`、`transportClosed` 显示对应分类及安全 detail；detail 不为空时不得落到通用错误句。
+3. 包含 `authorization=...`、`token=...`、Cookie、URL query、Windows/Unix 路径、私钥块的错误，只替换敏感值并保留同一行中的状态码和其它诊断字段。
+4. 包含 `out of memory`、`ENOMEM`、Windows 内存不足文本或 IPC/stdio 失败文本时，用户能看到对应安全文本。
+5. HostDropped 只在确实没有可读错误事实时出现；所有显式捕获的 panic/transport/IPC 错误继续走 typed failure。
+6. 运行前端 DirectProject 错误映射测试、Rust redaction/runtime_error/turn_error 定向测试、TypeScript 类型检查、编码检查和 `git diff --check`。
+
+## 当前证据
+
+- `npx vitest run tests/directTurnFailure.test.ts`：15 passed。
+- `npx tsc --noEmit -p apps/ai-game-creator-shell/tsconfig.json`：通过。
+- Rust app-server 上游映射定向测试：6 passed；应用日志脱敏测试与启动诊断脱敏测试均通过。
+- CC 错误分类回归：Claude sidecar 状态码/超时映射与非支付 409 保留上游状态的定向测试通过；侧车失败统一补充有界 stderr detail。
+- 真实 AGC dev smoke：客户端使用 `3080`、后端 `8084`、数据库 `3101`、后台 `3103` 启动；真实 CC 回合复现 `Reached maximum number of turns (8)` 被旧代码错误记为 `transport-closed`，修复后 Tauri 已热重编译重启。修复后的真实 Provider 回放未再次发送，避免无必要的付费请求。
+- 真实 Provider、真实 IPC 断链和真实内存压力尚未在本轮执行。
diff --git a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
index e44108140..e2fb93655 100644
--- a/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
+++ b/docs/technical/【技术方案】AI游戏创作智能体App实施计划-2026-06-24.md
@@ -81,7 +81,7 @@ Node/npm 版本探测清空继承环境后，必须设置客户端创建的临
 - **网络与凭据只在 Rust**。平台 origin、Bearer/refresh 凭据、OSS 直传票据、Provider 与更新清单请求都由 `src-tauri` 承担；渲染层通过 typed command 提交结构化意图，不再持有 access token，也不再声明 `http:default` 权限（`capabilities/main.json`）。`src/services/clientApi.ts` 与 `fetchClientHttp` 已删除。
 - **状态变更由 Rust 事件驱动**。正式状态归 Rust：Direct 活动回合的唯一事实源是 Direct 线程管理器的活动回合快照（`list_direct_active_turns` 只读它），登记、进度内容变化、收口各广播一次 `game-creator-direct-active-turns-changed`；素材生成与插件状态同理。渲染层进入入口时**先订阅、再读一次受控快照**，事件重复或内容未变时保持数组身份，卸载后迟到事件不写回；不恢复任何固定频率轮询（纯 UI 计时器、拖拽重复器与动画 tick 除外）。
 - **维护态判定归 Rust，渲染层只订阅**。平台请求的错误分支统一经 `platform_maintenance::watch_platform_response` 分类（只有 `503` 且命中 `MAINTENANCE` 或「维护」才算，对象存储自身的 503 不误伤），命中后广播 `genarrative-client-maintenance-detected`；渲染层由 `clientMaintenance.subscribeClientMaintenanceEvent` 订阅并打开唯一的「系统维护中」弹窗，业务面板各自的错误文案保持不变，同一批并发失败只弹一次。
-- **失败文案只展示宿主给的脱敏摘要**。`turn.completed.failure` 是失败说明的唯一来源，渲染层不做 HTTP 判定、不预读诊断正文；失败线索留在 `.agent/runtime/errors`、应用日志与错误上报池（`5398a53e6` 起用户可见文案不再带诊断引用）。
+- **失败文案展示宿主给的精确脱敏事实**。`turn.completed.failure` 是失败说明的唯一来源，渲染层按 typed 变体展示 HTTP 状态、错误码、IPC/stdio、操作系统错误和上游正文；只替换凭据值、完整 URL、绝对路径与私钥，不再因命中 `authorization/token/credential` 删除整条错误。失败线索仍写入 `.agent/runtime/errors`、应用日志与错误上报池。
 - **活动回合之外的两条配套约束**：命令返回 `Ok` 只代表接单成立，整轮收场只由 `turn.completed` 回答；渲染层的队列、忙态与提示都以事件流的这些终态为准。
 
 证据入口：`cargo test --manifest-path apps/ai-game-creator-shell/src-tauri/Cargo.toml --offline -- direct_thread_manager --test-threads=1`、`-- platform_maintenance --test-threads=1`、`npx vitest run tests/directActiveTurns.test.tsx tests/maintenanceNotice.test.tsx --root apps/ai-game-creator-shell`。