diff --git a/frontend-web/src/pages/official-multi-agent-tasks/components/AgentFlow.tsx b/frontend-web/src/pages/official-multi-agent-tasks/components/AgentFlow.tsx
index 6b4af95d..9a927c49 100644
--- a/frontend-web/src/pages/official-multi-agent-tasks/components/AgentFlow.tsx
+++ b/frontend-web/src/pages/official-multi-agent-tasks/components/AgentFlow.tsx
@@ -34,6 +34,39 @@ export default function AgentFlow({
 }: AgentFlowProps) {
   const seatById = new Map(seats.map((seat) => [seat.agent_id, seat]));
 
+  // 只有一个阶段时不画阶段框：席位直接横向排列。
+  if (stages.length === 1) {
+    return (
+      <div className={`mat-flow mat-flow--single mat-flow--${size}`}>
+        {stages[0]!.map((agentId) => {
+          const seat = seatById.get(agentId);
+          const state = seatStates?.[agentId] ?? null;
+          return (
+            <div
+              className={`mat-seat mat-seat--c${seatColorIndex(agentId)}${
+                state ? ` is-${state}` : ""
+              }`}
+              key={agentId}
+              title={
+                seat?.description
+                  ? `${seat.name}：${seat.description}`
+                  : (seat?.name ?? agentId)
+              }
+            >
+              <span className="mat-seat-avatar">
+                <Bot size={size === "sm" ? 11 : 12} strokeWidth={2.2} />
+              </span>
+              <span className="mat-seat-name">{seat?.name ?? agentId}</span>
+              {state && (
+                <span className={`mat-seat-dot is-${state}`} title={STATE_LABEL[state]} />
+              )}
+            </div>
+          );
+        })}
+      </div>
+    );
+  }
+
   return (
     <div className={`mat-flow mat-flow--${size}`}>
       {stages.map((stage, stageIndex) => {
diff --git a/frontend-web/src/pages/official-multi-agent-tasks/multi-agent-tasks.css b/frontend-web/src/pages/official-multi-agent-tasks/multi-agent-tasks.css
index 9263b730..69f67d80 100644
--- a/frontend-web/src/pages/official-multi-agent-tasks/multi-agent-tasks.css
+++ b/frontend-web/src/pages/official-multi-agent-tasks/multi-agent-tasks.css
@@ -549,6 +549,11 @@
 .mat-flow--sm .mat-flow-stage { padding: 6px; }
 .mat-flow--sm .mat-flow-stage-head { margin-bottom: 6px; }
 
+/* 单阶段：无阶段框，席位横向并排 */
+.mat-flow--single {
+  gap: 6px;
+}
+
 /* 席位胶囊：浅底（-03 系）+ 深字（-10 系）+ 实填头像（-09），色序=§1.1.10 */
 .mat-seat {
   align-items: center;
diff --git a/frontend-web/src/pages/official-task-analysis/store.ts b/frontend-web/src/pages/official-task-analysis/store.ts
index b48b35e0..39c24fa7 100644
--- a/frontend-web/src/pages/official-task-analysis/store.ts
+++ b/frontend-web/src/pages/official-task-analysis/store.ts
@@ -26,7 +26,7 @@ import type {
   TaTask,
 } from "./types";
 
-const STORAGE_KEY = "deerflow.official.task-analysis.v1";
+const STORAGE_KEY = "deerflow.official.task-analysis.v2";
 
 interface TaStore {
   tasks: TaTask[];
@@ -126,8 +126,8 @@ function seedStore(): TaStore {
       name: "竞品新品发布追踪",
       description: "追踪 5 家核心竞品的新品发布与市场反应，按块更新详情内容。",
       binding: {
-        chainId: "seed-chain-std",
-        chainTitle: "标准舆情分析链",
+        chainId: "seed-chain-single",
+        chainTitle: "单阶段并行分析链",
         cron: "30 8 * * 1",
         cronText: "每周一 08:30",
         enabled: false,
@@ -156,6 +156,7 @@ function seedStore(): TaStore {
     ["analyst"],
     ["writer"],
   ];
+  const singleStages = [["collector", "verifier", "analyst"]];
   const stdNames = seats;
 
   const runs: TaRunRecord[] = [
@@ -202,9 +203,9 @@ function seedStore(): TaStore {
       trigger: "schedule",
       scheduledFor: hoursAgo(24 * 3),
       startedAt: hoursAgo(24 * 3),
-      durationMs: PENDING_MS + stdStages.length * STAGE_MS,
-      stages: stdStages,
-      stageGoals: ["并行完成全网采集与数据核查", "研判风险与行动方向", "汇总各块结论"],
+      durationMs: PENDING_MS + singleStages.length * STAGE_MS,
+      stages: singleStages,
+      stageGoals: ["三席并行：采集 / 核查 / 研判同时产出"],
       seatNames: stdNames,
       failStage: null,
     },
@@ -507,6 +508,9 @@ export function chainStagesOf(
       ["writer"],
     ];
   }
+  if (binding.chainId === "seed-chain-single") {
+    return [["collector", "verifier", "analyst"]];
+  }
   // 真实业务链的编排由页面侧传入的 chain 数据展开；存储层兜底为单席位串行。
   const seats = seedSeatsOf(store);
   return seats.map((agentId) => [agentId]);
diff --git a/frontend-web/src/pages/official-task-analysis/task-analysis.css b/frontend-web/src/pages/official-task-analysis/task-analysis.css
index 3d499f08..b6bd9276 100644
--- a/frontend-web/src/pages/official-task-analysis/task-analysis.css
+++ b/frontend-web/src/pages/official-task-analysis/task-analysis.css
@@ -939,15 +939,14 @@
 }
 
 .ta-chain-card {
-  align-items: center;
   background: var(--mat-panel);
   border: 1px solid var(--mat-line);
   border-radius: 4px;
   cursor: pointer;
-  display: grid;
+  display: flex;
   font: inherit;
-  gap: 4px 16px;
-  grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
+  flex-direction: column;
+  gap: 8px;
   padding: 12px 16px;
   text-align: left;
   transition: border-color 120ms ease, box-shadow 120ms ease;
@@ -968,8 +967,6 @@
   color: var(--mat-primary);
   display: flex;
   gap: 6px;
-  grid-column: 1;
-  width: 100%;
 }
 
 .ta-chain-card.is-active header svg {
@@ -999,18 +996,14 @@
   -webkit-box-orient: vertical;
   -webkit-line-clamp: 2;
   font-size: 12px;
-  grid-column: 1;
   line-height: 1.5;
   margin: 0;
   overflow: hidden;
 }
 
 .ta-chain-card-flow {
-  align-self: center;
   background: var(--fs-004-02);
   border-radius: 2px;
-  grid-column: 2;
-  grid-row: 1 / span 2;
   overflow-x: auto;
   padding: 8px;
   width: 100%;
@@ -1341,13 +1334,4 @@
   .ta-chain-grid {
     grid-template-columns: 1fr;
   }
-
-  .ta-chain-card {
-    grid-template-columns: 1fr;
-  }
-
-  .ta-chain-card-flow {
-    grid-column: 1;
-    grid-row: auto;
-  }
 }
diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/persistence/migrations/versions/20260909_01_merge_assistant_wiki_and_report_collaboration_heads.py b/offline-backend-20260512/backend/packages/harness/deerflow/persistence/migrations/versions/20260909_01_merge_assistant_wiki_and_report_collaboration_heads.py
new file mode 100644
index 00000000..4a3707a4
--- /dev/null
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/persistence/migrations/versions/20260909_01_merge_assistant_wiki_and_report_collaboration_heads.py
@@ -0,0 +1,21 @@
+"""Merge assistant-wiki metadata and report-collaboration heads.
+
+Revision ID: 20260909_01
+Revises: 20260903_01, 20260907_01
+Create Date: 2026-09-09
+"""
+
+from __future__ import annotations
+
+revision = "20260909_01"
+down_revision = ("20260903_01", "20260907_01")
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass