diff --git a/bioflow_service/app/services/bioflow/runner.py b/bioflow_service/app/services/bioflow/runner.py
index ef9c7f4..837c452 100644
--- a/bioflow_service/app/services/bioflow/runner.py
+++ b/bioflow_service/app/services/bioflow/runner.py
@@ -27,6 +27,7 @@ from pathlib import Path
 from typing import Any, Awaitable, Callable
 
 from .catalog import StageCatalog
+from .errors import classify_reason
 from .events import EventBus
 from .manifests import ManifestError, locate_manifest, parse_manifest
 from .recovery import RecoveryBudget
@@ -1059,10 +1060,19 @@ class Runner:
         self._set_stage(record, stage, status=STAGE_FAILED, finished_at=_now_iso(),
                         error=reason)
         await self._persist_stage(record, stage)
+        cat, diag, retry, actions = classify_reason(reason, exit_code=exit_code)
+        guidance = f"阶段 {stage} 执行失败：{reason}。"
+        if actions:
+            guidance += "建议：" + "；".join(actions) + "。"
         self.events.publish("stage_failed", {
             "job_id": record.id, "stage": stage,
             "exit_code": exit_code if exit_code is not None else -1,
             "reason": reason,
+            "category": cat, "code": reason, "summary": reason,
+            "diagnosis_status": diag,
+            "retryable_without_change": retry,
+            "suggested_actions": actions,
+            "guidance": guidance,
         })
 
     def _prefix_for(self, record: JobRecord, stage: str) -> str | None:
diff --git a/ui/src/stores/chat.js b/ui/src/stores/chat.js
index b45a132..8643c6b 100644
--- a/ui/src/stores/chat.js
+++ b/ui/src/stores/chat.js
@@ -1170,6 +1170,7 @@ export const useChatStore = defineStore('chat', {
               if (frame) this.scrollSeq++;
               if (type === 'stage_await_confirm' && data) { patchBioflowGuidance(m, data.guidance); patchBioflowForm(m, data); this.scrollSeq++; }
               else if (type === 'stage_await_files' && data) { patchBioflowGuidance(m, data.guidance || data.message); patchBioflowFile(m, data); this.scrollSeq++; }
+              else if (type === 'stage_failed' && data) { patchBioflowGuidance(m, data.guidance); patchBioflowDiagnosis(m, data); this.scrollSeq++; }
               else if (type === 'job_done' && data) {
                 patchBioflowGuidance(m, data.guidance);
                 const ab = patchBioflowArchiveSuggest(m, data.job_id || jobId);
@@ -2272,6 +2273,10 @@ export const useChatStore = defineStore('chat', {
               patchBioflowGuidance(aMsg, data.guidance || data.message);
               patchBioflowFile(aMsg, data);
               this.scrollSeq++;
+            } else if (type === 'stage_failed' && data) {
+              patchBioflowGuidance(aMsg, data.guidance);
+              patchBioflowDiagnosis(aMsg, data);
+              this.scrollSeq++;
             } else if (type === 'job_done' && data) {
               patchBioflowGuidance(aMsg, data.guidance);
               const blk = patchBioflowArchiveSuggest(aMsg, data.job_id || jobId);