Fix agent output summary for pipeline steps (#812)

* Changes from fix/agent-output-summary-for-pipeline-steps

* feat: Optimize pipeline summary extraction and fix regex vulnerability

* fix: Use fallback summary for pipeline steps when extraction fails

* fix: Strip follow-up session scaffold from pipeline step fallback summaries

apps/ui/src/components/views/board-view/components/kanban-card/agent-info-panel.tsx

@@ -12,6 +12,7 @@ import { SummaryDialog } from './summary-dialog';
 import { getProviderIconForModel } from '@/components/ui/provider-icon';
 import { useFeature, useAgentOutput } from '@/hooks/queries';
 import { queryKeys } from '@/lib/query-keys';
+import { getFirstNonEmptySummary } from '@/lib/summary-selection';
 
 /**
  * Formats thinking level for compact display
@@ -67,6 +68,8 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
   const [taskStatusMap, setTaskStatusMap] = useState<
     Map<string, 'pending' | 'in_progress' | 'completed'>
   >(new Map());
+  // Track real-time task summary updates from WebSocket events
+  const [taskSummaryMap, setTaskSummaryMap] = useState<Map<string, string>>(new Map());
   // Track last WebSocket event timestamp to know if we're receiving real-time updates
   const [lastWsEventTimestamp, setLastWsEventTimestamp] = useState<number | null>(null);
 
@@ -163,6 +166,11 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
     return null;
   }, [contextContent, agentOutputContent]);
 
+  // Prefer freshly fetched feature summary over potentially stale list data.
+  const effectiveSummary =
+    getFirstNonEmptySummary(freshFeature?.summary, feature.summary, summary, agentInfo?.summary) ??
+    undefined;
+
   // Fresh planSpec data from API (more accurate than store data for task progress)
   const freshPlanSpec = useMemo(() => {
     if (!freshFeature?.planSpec) return null;
@@ -197,11 +205,13 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
           return {
             content: task.description,
             status: (finalStatus || 'completed') as 'pending' | 'in_progress' | 'completed',
+            summary: task.summary,
           };
         }
 
         // Use real-time status from WebSocket events if available
         const realtimeStatus = taskStatusMap.get(task.id);
+        const realtimeSummary = taskSummaryMap.get(task.id);
 
         // Calculate status: WebSocket status > index-based status > task.status
         let effectiveStatus: 'pending' | 'in_progress' | 'completed';
@@ -224,6 +234,7 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
         return {
           content: task.description,
           status: effectiveStatus,
+          summary: realtimeSummary ?? task.summary,
         };
       });
     }
@@ -236,6 +247,7 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
     feature.planSpec?.currentTaskId,
     agentInfo?.todos,
     taskStatusMap,
+    taskSummaryMap,
     isFeatureFinished,
   ]);
 
@@ -280,6 +292,19 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
               newMap.set(taskEvent.taskId, 'completed');
               return newMap;
             });
+
+            if ('summary' in event) {
+              setTaskSummaryMap((prev) => {
+                const newMap = new Map(prev);
+                // Allow empty string (reset) or non-empty string to be set
+                const summary =
+                  typeof event.summary === 'string' && event.summary.trim().length > 0
+                    ? event.summary
+                    : null;
+                newMap.set(taskEvent.taskId, summary);
+                return newMap;
+              });
+            }
           }
           break;
       }
@@ -331,7 +356,13 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
   // OR if the feature is actively running (ensures panel stays visible during execution)
   // Note: hasPlanSpecTasks is already defined above and includes freshPlanSpec
   // (The backlog case was already handled above and returned early)
-  if (agentInfo || hasPlanSpecTasks || effectiveTodos.length > 0 || isActivelyRunning) {
+  if (
+    agentInfo ||
+    hasPlanSpecTasks ||
+    effectiveTodos.length > 0 ||
+    isActivelyRunning ||
+    effectiveSummary
+  ) {
     return (
       <>
         <div className="mb-3 space-y-2 overflow-hidden">
@@ -379,24 +410,31 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
               >
                 {(isTodosExpanded ? effectiveTodos : effectiveTodos.slice(0, 3)).map(
                   (todo, idx) => (
-                    <div key={idx} className="flex items-center gap-1.5 text-[10px]">
-                      {todo.status === 'completed' ? (
-                        <CheckCircle2 className="w-2.5 h-2.5 text-[var(--status-success)] shrink-0" />
-                      ) : todo.status === 'in_progress' ? (
-                        <Spinner size="xs" className="w-2.5 h-2.5 shrink-0" />
-                      ) : (
-                        <Circle className="w-2.5 h-2.5 text-muted-foreground/50 shrink-0" />
-                      )}
-                      <span
-                        className={cn(
-                          'break-words hyphens-auto line-clamp-2 leading-relaxed',
-                          todo.status === 'completed' && 'text-muted-foreground/60 line-through',
-                          todo.status === 'in_progress' && 'text-[var(--status-warning)]',
-                          todo.status === 'pending' && 'text-muted-foreground/80'
+                    <div key={idx} className="flex flex-col gap-0.5">
+                      <div className="flex items-center gap-1.5 text-[10px]">
+                        {todo.status === 'completed' ? (
+                          <CheckCircle2 className="w-2.5 h-2.5 text-[var(--status-success)] shrink-0" />
+                        ) : todo.status === 'in_progress' ? (
+                          <Spinner size="xs" className="w-2.5 h-2.5 shrink-0" />
+                        ) : (
+                          <Circle className="w-2.5 h-2.5 text-muted-foreground/50 shrink-0" />
                         )}
-                      >
-                        {todo.content}
-                      </span>
+                        <span
+                          className={cn(
+                            'break-words hyphens-auto line-clamp-2 leading-relaxed',
+                            todo.status === 'completed' && 'text-muted-foreground/60 line-through',
+                            todo.status === 'in_progress' && 'text-[var(--status-warning)]',
+                            todo.status === 'pending' && 'text-muted-foreground/80'
+                          )}
+                        >
+                          {todo.content}
+                        </span>
+                      </div>
+                      {todo.summary && isTodosExpanded && (
+                        <div className="pl-4 text-[9px] text-muted-foreground/50 italic break-words line-clamp-2">
+                          {todo.summary}
+                        </div>
+                      )}
                     </div>
                   )
                 )}
@@ -417,10 +455,12 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
             </div>
           )}
 
-          {/* Summary for waiting_approval and verified */}
-          {(feature.status === 'waiting_approval' || feature.status === 'verified') && (
-            <>
-              {(feature.summary || summary || agentInfo?.summary) && (
+          {/* Summary for waiting_approval, verified, and pipeline steps */}
+          {(feature.status === 'waiting_approval' ||
+            feature.status === 'verified' ||
+            (typeof feature.status === 'string' && feature.status.startsWith('pipeline_'))) && (
+            <div className="space-y-1.5">
+              {effectiveSummary && (
                 <div className="space-y-1.5 pt-2 border-t border-border/30 overflow-hidden">
                   <div className="flex items-center justify-between gap-2">
                     <div className="flex items-center gap-1 text-[10px] text-[var(--status-success)] min-w-0">
@@ -446,37 +486,35 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
                     onPointerDown={(e) => e.stopPropagation()}
                     onMouseDown={(e) => e.stopPropagation()}
                   >
-                    {feature.summary || summary || agentInfo?.summary}
+                    {effectiveSummary}
                   </p>
                 </div>
               )}
-              {!feature.summary &&
-                !summary &&
-                !agentInfo?.summary &&
-                (agentInfo?.toolCallCount ?? 0) > 0 && (
-                  <div className="flex items-center gap-2 text-[10px] text-muted-foreground/60 pt-2 border-t border-border/30">
+              {!effectiveSummary && (agentInfo?.toolCallCount ?? 0) > 0 && (
+                <div className="flex items-center gap-2 text-[10px] text-muted-foreground/60 pt-2 border-t border-border/30">
+                  <span className="flex items-center gap-1">
+                    <Wrench className="w-2.5 h-2.5" />
+                    {agentInfo?.toolCallCount ?? 0} tool calls
+                  </span>
+                  {effectiveTodos.length > 0 && (
                     <span className="flex items-center gap-1">
-                      <Wrench className="w-2.5 h-2.5" />
-                      {agentInfo?.toolCallCount ?? 0} tool calls
+                      <CheckCircle2 className="w-2.5 h-2.5 text-[var(--status-success)]" />
+                      {effectiveTodos.filter((t) => t.status === 'completed').length} tasks done
                     </span>
-                    {effectiveTodos.length > 0 && (
-                      <span className="flex items-center gap-1">
-                        <CheckCircle2 className="w-2.5 h-2.5 text-[var(--status-success)]" />
-                        {effectiveTodos.filter((t) => t.status === 'completed').length} tasks done
-                      </span>
-                    )}
-                  </div>
-                )}
-            </>
+                  )}
+                </div>
+              )}
+            </div>
           )}
         </div>
         {/* SummaryDialog must be rendered alongside the expand button */}
         <SummaryDialog
           feature={feature}
           agentInfo={agentInfo}
-          summary={summary}
+          summary={effectiveSummary}
           isOpen={isSummaryDialogOpen}
           onOpenChange={setIsSummaryDialogOpen}
+          projectPath={projectPath}
         />
       </>
     );
@@ -488,9 +526,10 @@ export const AgentInfoPanel = memo(function AgentInfoPanel({
     <SummaryDialog
       feature={feature}
       agentInfo={agentInfo}
-      summary={summary}
+      summary={effectiveSummary}
       isOpen={isSummaryDialogOpen}
       onOpenChange={setIsSummaryDialogOpen}
+      projectPath={projectPath}
     />
   );
 });

apps/ui/src/components/views/board-view/components/kanban-card/summary-dialog.tsx

@@ -1,6 +1,13 @@
-// @ts-nocheck - dialog state typing with feature summary extraction
-import { Feature } from '@/store/app-store';
-import { AgentTaskInfo } from '@/lib/agent-context-parser';
+import { useMemo, useState, useRef, useEffect } from 'react';
+import type { Feature } from '@/store/app-store';
+import type { AgentTaskInfo } from '@/lib/agent-context-parser';
+import {
+  parseAllPhaseSummaries,
+  isAccumulatedSummary,
+  type PhaseSummaryEntry,
+} from '@/lib/log-parser';
+import { getFirstNonEmptySummary } from '@/lib/summary-selection';
+import { useAgentOutput } from '@/hooks/queries';
 import {
   Dialog,
   DialogContent,
@@ -11,7 +18,10 @@ import {
 } from '@/components/ui/dialog';
 import { Button } from '@/components/ui/button';
 import { Markdown } from '@/components/ui/markdown';
-import { Sparkles } from 'lucide-react';
+import { LogViewer } from '@/components/ui/log-viewer';
+import { Sparkles, Layers, FileText, ChevronLeft, ChevronRight } from 'lucide-react';
+import { Spinner } from '@/components/ui/spinner';
+import { cn } from '@/lib/utils';
 
 interface SummaryDialogProps {
   feature: Feature;
@@ -19,6 +29,118 @@ interface SummaryDialogProps {
   summary?: string;
   isOpen: boolean;
   onOpenChange: (open: boolean) => void;
+  projectPath?: string;
+}
+
+type ViewMode = 'summary' | 'output';
+
+/**
+ * Renders a single phase entry card with header and content.
+ * Extracted for better separation of concerns and readability.
+ */
+function PhaseEntryCard({
+  entry,
+  index,
+  totalPhases,
+  hasMultiplePhases,
+  isActive,
+  onClick,
+}: {
+  entry: PhaseSummaryEntry;
+  index: number;
+  totalPhases: number;
+  hasMultiplePhases: boolean;
+  isActive?: boolean;
+  onClick?: () => void;
+}) {
+  const handleKeyDown = (event: React.KeyboardEvent) => {
+    if (onClick && (event.key === 'Enter' || event.key === ' ')) {
+      event.preventDefault();
+      onClick();
+    }
+  };
+
+  return (
+    <div
+      className={cn(
+        'p-4 bg-card rounded-lg border border-border/50 transition-all',
+        isActive && 'ring-2 ring-primary/50 border-primary/50',
+        onClick && 'cursor-pointer'
+      )}
+      onClick={onClick}
+      onKeyDown={handleKeyDown}
+      role={onClick ? 'button' : undefined}
+      tabIndex={onClick ? 0 : undefined}
+    >
+      {/* Phase header - styled to stand out */}
+      <div className="flex items-center gap-2 mb-3 pb-2 border-b border-border/30">
+        <span className="text-sm font-semibold text-primary">{entry.phaseName}</span>
+        {hasMultiplePhases && (
+          <span className="text-xs text-muted-foreground">
+            Step {index + 1} of {totalPhases}
+          </span>
+        )}
+      </div>
+      {/* Phase content */}
+      <Markdown>{entry.content || 'No summary available'}</Markdown>
+    </div>
+  );
+}
+
+/**
+ * Step navigator component for multi-phase summaries
+ */
+function StepNavigator({
+  phaseEntries,
+  activeIndex,
+  onIndexChange,
+}: {
+  phaseEntries: PhaseSummaryEntry[];
+  activeIndex: number;
+  onIndexChange: (index: number) => void;
+}) {
+  if (phaseEntries.length <= 1) return null;
+
+  return (
+    <div className="flex items-center gap-2 p-2 bg-muted/50 rounded-lg shrink-0">
+      <Button
+        variant="ghost"
+        size="sm"
+        className="h-7 w-7 p-0"
+        onClick={() => onIndexChange(Math.max(0, activeIndex - 1))}
+        disabled={activeIndex === 0}
+      >
+        <ChevronLeft className="w-4 h-4" />
+      </Button>
+
+      <div className="flex items-center gap-1 overflow-x-auto">
+        {phaseEntries.map((entry, index) => (
+          <button
+            key={`step-nav-${index}`}
+            onClick={() => onIndexChange(index)}
+            className={cn(
+              'px-2.5 py-1 rounded-md text-xs font-medium transition-all whitespace-nowrap',
+              index === activeIndex
+                ? 'bg-primary text-primary-foreground'
+                : 'text-muted-foreground hover:text-foreground hover:bg-accent'
+            )}
+          >
+            {entry.phaseName}
+          </button>
+        ))}
+      </div>
+
+      <Button
+        variant="ghost"
+        size="sm"
+        className="h-7 w-7 p-0"
+        onClick={() => onIndexChange(Math.min(phaseEntries.length - 1, activeIndex + 1))}
+        disabled={activeIndex === phaseEntries.length - 1}
+      >
+        <ChevronRight className="w-4 h-4" />
+      </Button>
+    </div>
+  );
 }
 
 export function SummaryDialog({
@@ -27,7 +149,63 @@ export function SummaryDialog({
   summary,
   isOpen,
   onOpenChange,
+  projectPath,
 }: SummaryDialogProps) {
+  const [viewMode, setViewMode] = useState<ViewMode>('summary');
+  const [activePhaseIndex, setActivePhaseIndex] = useState(0);
+  const contentRef = useRef<HTMLDivElement>(null);
+
+  // Prefer explicitly provided summary (can come from fresh per-feature query),
+  // then fall back to feature/agent-info summaries.
+  const rawSummary = getFirstNonEmptySummary(summary, feature.summary, agentInfo?.summary);
+
+  // Normalize null to undefined for parser helpers that expect string | undefined
+  const normalizedSummary = rawSummary ?? undefined;
+
+  // Memoize the parsed phases to avoid re-parsing on every render
+  const phaseEntries = useMemo(
+    () => parseAllPhaseSummaries(normalizedSummary),
+    [normalizedSummary]
+  );
+
+  // Memoize the multi-phase check
+  const hasMultiplePhases = useMemo(
+    () => isAccumulatedSummary(normalizedSummary),
+    [normalizedSummary]
+  );
+
+  // Fetch agent output
+  const { data: agentOutput = '', isLoading: isLoadingOutput } = useAgentOutput(
+    projectPath || '',
+    feature.id,
+    {
+      enabled: isOpen && !!projectPath && viewMode === 'output',
+    }
+  );
+
+  // Reset active phase index when summary changes
+  useEffect(() => {
+    setActivePhaseIndex(0);
+  }, [normalizedSummary]);
+
+  // Scroll to active phase when it changes or when normalizedSummary changes
+  useEffect(() => {
+    if (contentRef.current && hasMultiplePhases) {
+      const phaseCards = contentRef.current.querySelectorAll('[data-phase-index]');
+      // Ensure index is within bounds
+      const safeIndex = Math.min(activePhaseIndex, phaseCards.length - 1);
+      const targetCard = phaseCards[safeIndex];
+      if (targetCard) {
+        targetCard.scrollIntoView({ behavior: 'smooth', block: 'start' });
+      }
+    }
+  }, [activePhaseIndex, hasMultiplePhases, normalizedSummary]);
+
+  // Determine the dialog title based on number of phases
+  const dialogTitle = hasMultiplePhases
+    ? `Pipeline Summary (${phaseEntries.length} steps)`
+    : 'Implementation Summary';
+
   return (
     <Dialog open={isOpen} onOpenChange={onOpenChange}>
       <DialogContent
@@ -38,10 +216,44 @@ export function SummaryDialog({
         onDoubleClick={(e) => e.stopPropagation()}
       >
         <DialogHeader>
-          <DialogTitle className="flex items-center gap-2">
-            <Sparkles className="w-5 h-5 text-[var(--status-success)]" />
-            Implementation Summary
-          </DialogTitle>
+          <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-2 pr-10">
+            <DialogTitle className="flex items-center gap-2">
+              {hasMultiplePhases ? (
+                <Layers className="w-5 h-5 text-[var(--status-success)]" />
+              ) : (
+                <Sparkles className="w-5 h-5 text-[var(--status-success)]" />
+              )}
+              {dialogTitle}
+            </DialogTitle>
+
+            {/* View mode tabs */}
+            <div className="flex items-center gap-1 bg-muted rounded-lg p-1">
+              <button
+                onClick={() => setViewMode('summary')}
+                className={cn(
+                  'flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium transition-all whitespace-nowrap',
+                  viewMode === 'summary'
+                    ? 'bg-primary/20 text-primary shadow-sm'
+                    : 'text-muted-foreground hover:text-foreground hover:bg-accent'
+                )}
+              >
+                <Sparkles className="w-3.5 h-3.5" />
+                Summary
+              </button>
+              <button
+                onClick={() => setViewMode('output')}
+                className={cn(
+                  'flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium transition-all whitespace-nowrap',
+                  viewMode === 'output'
+                    ? 'bg-primary/20 text-primary shadow-sm'
+                    : 'text-muted-foreground hover:text-foreground hover:bg-accent'
+                )}
+              >
+                <FileText className="w-3.5 h-3.5" />
+                Output
+              </button>
+            </div>
+          </div>
           <DialogDescription
             className="text-sm"
             title={feature.description || feature.summary || ''}
@@ -52,11 +264,55 @@ export function SummaryDialog({
             })()}
           </DialogDescription>
         </DialogHeader>
-        <div className="flex-1 overflow-y-auto p-4 bg-card rounded-lg border border-border/50">
-          <Markdown>
-            {feature.summary || summary || agentInfo?.summary || 'No summary available'}
-          </Markdown>
-        </div>
+
+        {/* Step navigator for multi-phase summaries */}
+        {viewMode === 'summary' && hasMultiplePhases && (
+          <StepNavigator
+            phaseEntries={phaseEntries}
+            activeIndex={activePhaseIndex}
+            onIndexChange={setActivePhaseIndex}
+          />
+        )}
+
+        {/* Content area */}
+        {viewMode === 'summary' ? (
+          <div ref={contentRef} className="flex-1 overflow-y-auto space-y-4">
+            {phaseEntries.length > 0 ? (
+              phaseEntries.map((entry, index) => (
+                <div key={`phase-${index}-${entry.phaseName}`} data-phase-index={index}>
+                  <PhaseEntryCard
+                    entry={entry}
+                    index={index}
+                    totalPhases={phaseEntries.length}
+                    hasMultiplePhases={hasMultiplePhases}
+                    isActive={hasMultiplePhases && index === activePhaseIndex}
+                    onClick={hasMultiplePhases ? () => setActivePhaseIndex(index) : undefined}
+                  />
+                </div>
+              ))
+            ) : (
+              <div className="p-4 bg-card rounded-lg border border-border/50">
+                <Markdown>No summary available</Markdown>
+              </div>
+            )}
+          </div>
+        ) : (
+          <div className="flex-1 min-h-0 overflow-y-auto bg-popover border border-border/50 rounded-lg p-4 font-mono text-xs">
+            {isLoadingOutput ? (
+              <div className="flex items-center justify-center h-full text-muted-foreground">
+                <Spinner size="lg" className="mr-2" />
+                Loading output...
+              </div>
+            ) : !agentOutput ? (
+              <div className="flex items-center justify-center h-full text-muted-foreground">
+                No agent output available.
+              </div>
+            ) : (
+              <LogViewer output={agentOutput} />
+            )}
+          </div>
+        )}
+
         <DialogFooter>
           <Button
             variant="ghost"

apps/ui/src/components/views/board-view/dialogs/agent-output-modal.tsx

@@ -6,7 +6,8 @@ import {
   DialogHeader,
   DialogTitle,
 } from '@/components/ui/dialog';
-import { List, FileText, GitBranch, ClipboardList } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { List, FileText, GitBranch, ClipboardList, ChevronLeft, ChevronRight } from 'lucide-react';
 import { Spinner } from '@/components/ui/spinner';
 import { getElectronAPI } from '@/lib/electron';
 import { LogViewer } from '@/components/ui/log-viewer';
@@ -14,8 +15,15 @@ import { GitDiffPanel } from '@/components/ui/git-diff-panel';
 import { TaskProgressPanel } from '@/components/ui/task-progress-panel';
 import { Markdown } from '@/components/ui/markdown';
 import { useAppStore } from '@/store/app-store';
-import { extractSummary } from '@/lib/log-parser';
-import { useAgentOutput } from '@/hooks/queries';
+import {
+  extractSummary,
+  parseAllPhaseSummaries,
+  isAccumulatedSummary,
+  type PhaseSummaryEntry,
+} from '@/lib/log-parser';
+import { getFirstNonEmptySummary } from '@/lib/summary-selection';
+import { useAgentOutput, useFeature } from '@/hooks/queries';
+import { cn } from '@/lib/utils';
 import type { AutoModeEvent } from '@/types/electron';
 import type { BacklogPlanEvent } from '@automaker/types';
 
@@ -36,6 +44,112 @@ interface AgentOutputModalProps {
 
 type ViewMode = 'summary' | 'parsed' | 'raw' | 'changes';
 
+/**
+ * Renders a single phase entry card with header and content.
+ */
+function PhaseEntryCard({
+  entry,
+  index,
+  totalPhases,
+  hasMultiplePhases,
+  isActive,
+  onClick,
+}: {
+  entry: PhaseSummaryEntry;
+  index: number;
+  totalPhases: number;
+  hasMultiplePhases: boolean;
+  isActive?: boolean;
+  onClick?: () => void;
+}) {
+  const handleKeyDown = (event: React.KeyboardEvent) => {
+    if (onClick && (event.key === 'Enter' || event.key === ' ')) {
+      event.preventDefault();
+      onClick();
+    }
+  };
+
+  return (
+    <div
+      className={cn(
+        'p-4 bg-card rounded-lg border border-border/50 transition-all',
+        isActive && 'ring-2 ring-primary/50 border-primary/50',
+        onClick && 'cursor-pointer'
+      )}
+      onClick={onClick}
+      onKeyDown={handleKeyDown}
+      role={onClick ? 'button' : undefined}
+      tabIndex={onClick ? 0 : undefined}
+    >
+      <div className="flex items-center gap-2 mb-3 pb-2 border-b border-border/30">
+        <span className="text-sm font-semibold text-primary">{entry.phaseName}</span>
+        {hasMultiplePhases && (
+          <span className="text-xs text-muted-foreground">
+            Step {index + 1} of {totalPhases}
+          </span>
+        )}
+      </div>
+      <Markdown>{entry.content || 'No summary available'}</Markdown>
+    </div>
+  );
+}
+
+/**
+ * Step navigator component for multi-phase summaries
+ */
+function StepNavigator({
+  phaseEntries,
+  activeIndex,
+  onIndexChange,
+}: {
+  phaseEntries: PhaseSummaryEntry[];
+  activeIndex: number;
+  onIndexChange: (index: number) => void;
+}) {
+  if (phaseEntries.length <= 1) return null;
+
+  return (
+    <div className="flex items-center gap-2 p-2 bg-muted/50 rounded-lg shrink-0">
+      <Button
+        variant="ghost"
+        size="sm"
+        className="h-7 w-7 p-0"
+        onClick={() => onIndexChange(Math.max(0, activeIndex - 1))}
+        disabled={activeIndex === 0}
+      >
+        <ChevronLeft className="w-4 h-4" />
+      </Button>
+
+      <div className="flex items-center gap-1 overflow-x-auto">
+        {phaseEntries.map((entry, index) => (
+          <button
+            key={`step-nav-${index}`}
+            onClick={() => onIndexChange(index)}
+            className={cn(
+              'px-2.5 py-1 rounded-md text-xs font-medium transition-all whitespace-nowrap',
+              index === activeIndex
+                ? 'bg-primary text-primary-foreground'
+                : 'text-muted-foreground hover:text-foreground hover:bg-accent'
+            )}
+          >
+            {entry.phaseName}
+          </button>
+        ))}
+      </div>
+
+      <Button
+        variant="ghost"
+        size="sm"
+        className="h-7 w-7 p-0"
+        onClick={() => onIndexChange(Math.min(phaseEntries.length - 1, activeIndex + 1))}
+        disabled={activeIndex === phaseEntries.length - 1}
+      >
+        <ChevronRight className="w-4 h-4" />
+      </Button>
+    </div>
+  );
+}
+
 export function AgentOutputModal({
   open,
   onClose,
@@ -56,10 +170,19 @@ export function AgentOutputModal({
   const [viewMode, setViewMode] = useState<ViewMode | null>(null);
 
   // Use React Query for initial output loading
-  const { data: initialOutput = '', isLoading } = useAgentOutput(resolvedProjectPath, featureId, {
+  const {
+    data: initialOutput = '',
+    isLoading,
+    refetch: refetchAgentOutput,
+  } = useAgentOutput(resolvedProjectPath, featureId, {
     enabled: open && !!resolvedProjectPath,
   });
 
+  // Fetch feature data to access the server-side accumulated summary
+  const { data: feature, refetch: refetchFeature } = useFeature(resolvedProjectPath, featureId, {
+    enabled: open && !!resolvedProjectPath && !isBacklogPlan,
+  });
+
   // Reset streamed content when modal opens or featureId changes
   useEffect(() => {
     if (open) {
@@ -70,8 +193,31 @@ export function AgentOutputModal({
   // Combine initial output from query with streamed content from WebSocket
   const output = initialOutput + streamedContent;
 
-  // Extract summary from output
-  const summary = useMemo(() => extractSummary(output), [output]);
+  // Extract summary from output (client-side fallback)
+  const extractedSummary = useMemo(() => extractSummary(output), [output]);
+
+  // Prefer server-side accumulated summary (handles pipeline step accumulation),
+  // fall back to client-side extraction from raw output.
+  const summary = getFirstNonEmptySummary(feature?.summary, extractedSummary);
+
+  // Normalize null to undefined for parser helpers that expect string | undefined
+  const normalizedSummary = summary ?? undefined;
+
+  // Parse summary into phases for multi-step navigation
+  const phaseEntries = useMemo(
+    () => parseAllPhaseSummaries(normalizedSummary),
+    [normalizedSummary]
+  );
+  const hasMultiplePhases = useMemo(
+    () => isAccumulatedSummary(normalizedSummary),
+    [normalizedSummary]
+  );
+  const [activePhaseIndex, setActivePhaseIndex] = useState(0);
+
+  // Reset active phase index when summary changes
+  useEffect(() => {
+    setActivePhaseIndex(0);
+  }, [normalizedSummary]);
 
   // Determine the effective view mode - default to summary if available, otherwise parsed
   const effectiveViewMode = viewMode ?? (summary ? 'summary' : 'parsed');
@@ -79,6 +225,15 @@ export function AgentOutputModal({
   const autoScrollRef = useRef(true);
   const useWorktrees = useAppStore((state) => state.useWorktrees);
 
+  // Force a fresh fetch when opening to avoid showing stale cached summaries.
+  useEffect(() => {
+    if (!open || !resolvedProjectPath || !featureId) return;
+    if (!isBacklogPlan) {
+      void refetchFeature();
+    }
+    void refetchAgentOutput();
+  }, [open, resolvedProjectPath, featureId, isBacklogPlan, refetchFeature, refetchAgentOutput]);
+
   // Auto-scroll to bottom when output changes
   useEffect(() => {
     if (autoScrollRef.current && scrollRef.current) {
@@ -86,6 +241,39 @@ export function AgentOutputModal({
     }
   }, [output]);
 
+  // Auto-scroll to bottom when summary changes (for pipeline step accumulation)
+  const summaryScrollRef = useRef<HTMLDivElement>(null);
+  const [summaryAutoScroll, setSummaryAutoScroll] = useState(true);
+
+  // Auto-scroll summary panel to bottom when summary is updated
+  useEffect(() => {
+    if (summaryAutoScroll && summaryScrollRef.current && normalizedSummary) {
+      summaryScrollRef.current.scrollTop = summaryScrollRef.current.scrollHeight;
+    }
+  }, [normalizedSummary, summaryAutoScroll]);
+
+  // Handle scroll to detect if user scrolled up in summary panel
+  const handleSummaryScroll = () => {
+    if (!summaryScrollRef.current) return;
+
+    const { scrollTop, scrollHeight, clientHeight } = summaryScrollRef.current;
+    const isAtBottom = scrollHeight - scrollTop - clientHeight < 50;
+    setSummaryAutoScroll(isAtBottom);
+  };
+
+  // Scroll to active phase when it changes or when summary changes
+  useEffect(() => {
+    if (summaryScrollRef.current && hasMultiplePhases) {
+      const phaseCards = summaryScrollRef.current.querySelectorAll('[data-phase-index]');
+      // Ensure index is within bounds
+      const safeIndex = Math.min(activePhaseIndex, phaseCards.length - 1);
+      const targetCard = phaseCards[safeIndex];
+      if (targetCard) {
+        targetCard.scrollIntoView({ behavior: 'smooth', block: 'start' });
+      }
+    }
+  }, [activePhaseIndex, hasMultiplePhases, normalizedSummary]);
+
   // Listen to auto mode events and update output
   useEffect(() => {
     if (!open) return;
@@ -420,9 +608,49 @@ export function AgentOutputModal({
             )}
           </div>
         ) : effectiveViewMode === 'summary' && summary ? (
-          <div className="flex-1 min-h-0 sm:min-h-[200px] sm:max-h-[60vh] overflow-y-auto bg-card border border-border/50 rounded-lg p-4 scrollbar-visible">
-            <Markdown>{summary}</Markdown>
-          </div>
+          <>
+            {/* Step navigator for multi-phase summaries */}
+            {hasMultiplePhases && (
+              <StepNavigator
+                phaseEntries={phaseEntries}
+                activeIndex={activePhaseIndex}
+                onIndexChange={setActivePhaseIndex}
+              />
+            )}
+
+            <div
+              ref={summaryScrollRef}
+              onScroll={handleSummaryScroll}
+              className="flex-1 min-h-0 sm:min-h-[200px] sm:max-h-[60vh] overflow-y-auto scrollbar-visible space-y-4 p-1"
+            >
+              {hasMultiplePhases ? (
+                // Multi-phase: render individual phase cards
+                phaseEntries.map((entry, index) => (
+                  <div key={`phase-${index}-${entry.phaseName}`} data-phase-index={index}>
+                    <PhaseEntryCard
+                      entry={entry}
+                      index={index}
+                      totalPhases={phaseEntries.length}
+                      hasMultiplePhases={hasMultiplePhases}
+                      isActive={index === activePhaseIndex}
+                      onClick={() => setActivePhaseIndex(index)}
+                    />
+                  </div>
+                ))
+              ) : (
+                // Single phase: render as markdown
+                <div className="bg-card border border-border/50 rounded-lg p-4">
+                  <Markdown>{summary}</Markdown>
+                </div>
+              )}
+            </div>
+
+            <div className="text-xs text-muted-foreground text-center shrink-0">
+              {summaryAutoScroll
+                ? 'Auto-scrolling enabled'
+                : 'Scroll to bottom to enable auto-scroll'}
+            </div>
+          </>
         ) : (
           <>
             <div

apps/ui/src/components/views/board-view/dialogs/completed-features-modal.tsx

@@ -1,4 +1,3 @@
-// @ts-nocheck - completed features filtering and grouping with status transitions
 import {
   Dialog,
   DialogContent,
@@ -11,6 +10,8 @@ import { Button } from '@/components/ui/button';
 import { Card, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
 import { ArchiveRestore, Trash2 } from 'lucide-react';
 import { Feature } from '@/store/app-store';
+import { extractImplementationSummary } from '@/lib/log-parser';
+import { getFirstNonEmptySummary } from '@/lib/summary-selection';
 
 interface CompletedFeaturesModalProps {
   open: boolean;
@@ -51,44 +52,54 @@ export function CompletedFeaturesModal({
             </div>
           ) : (
             <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
-              {completedFeatures.map((feature) => (
-                <Card
-                  key={feature.id}
-                  className="flex flex-col"
-                  data-testid={`completed-card-${feature.id}`}
-                >
-                  <CardHeader className="p-3 pb-2 flex-1">
-                    <CardTitle className="text-sm leading-tight line-clamp-3">
-                      {feature.description || feature.summary || feature.id}
-                    </CardTitle>
-                    <CardDescription className="text-xs mt-1 truncate">
-                      {feature.category || 'Uncategorized'}
-                    </CardDescription>
-                  </CardHeader>
-                  <div className="p-3 pt-0 flex gap-2">
-                    <Button
-                      variant="secondary"
-                      size="sm"
-                      className="flex-1 h-7 text-xs"
-                      onClick={() => onUnarchive(feature)}
-                      data-testid={`unarchive-${feature.id}`}
-                    >
-                      <ArchiveRestore className="w-3 h-3 mr-1" />
-                      Restore
-                    </Button>
-                    <Button
-                      variant="ghost"
-                      size="sm"
-                      className="h-7 w-7 p-0 text-muted-foreground hover:text-destructive"
-                      onClick={() => onDelete(feature)}
-                      data-testid={`delete-completed-${feature.id}`}
-                      title="Delete"
-                    >
-                      <Trash2 className="w-4 h-4" />
-                    </Button>
-                  </div>
-                </Card>
-              ))}
+              {completedFeatures.map((feature) => {
+                const implementationSummary = extractImplementationSummary(feature.summary);
+                const displayText = getFirstNonEmptySummary(
+                  implementationSummary,
+                  feature.summary,
+                  feature.description,
+                  feature.id
+                );
+
+                return (
+                  <Card
+                    key={feature.id}
+                    className="flex flex-col"
+                    data-testid={`completed-card-${feature.id}`}
+                  >
+                    <CardHeader className="p-3 pb-2 flex-1">
+                      <CardTitle className="text-sm leading-tight line-clamp-3">
+                        {displayText ?? feature.id}
+                      </CardTitle>
+                      <CardDescription className="text-xs mt-1 truncate">
+                        {feature.category || 'Uncategorized'}
+                      </CardDescription>
+                    </CardHeader>
+                    <div className="p-3 pt-0 flex gap-2">
+                      <Button
+                        variant="secondary"
+                        size="sm"
+                        className="flex-1 h-7 text-xs"
+                        onClick={() => onUnarchive(feature)}
+                        data-testid={`unarchive-${feature.id}`}
+                      >
+                        <ArchiveRestore className="w-3 h-3 mr-1" />
+                        Restore
+                      </Button>
+                      <Button
+                        variant="ghost"
+                        size="sm"
+                        className="h-7 w-7 p-0 text-muted-foreground hover:text-destructive"
+                        onClick={() => onDelete(feature)}
+                        data-testid={`delete-completed-${feature.id}`}
+                        title="Delete"
+                      >
+                        <Trash2 className="w-4 h-4" />
+                      </Button>
+                    </div>
+                  </Card>
+                );
+              })}
             </div>
           )}
         </div>