diff --git a/apps/web/src/components/pipeline/PipelineGraph.tsx b/apps/web/src/components/pipeline/PipelineGraph.tsx
index 790cb4b..be9d74a 100644
--- a/apps/web/src/components/pipeline/PipelineGraph.tsx
+++ b/apps/web/src/components/pipeline/PipelineGraph.tsx
@@ -43,9 +43,9 @@ export function PipelineGraph({ columns, tasksByPhase, taskDepsByPhase, dependen
           <div key={column.depth} className="flex items-start">
             {/* Connector arrow between columns */}
             {idx > 0 && (
-              <div className="flex items-center self-center py-4">
-                <div className="h-px w-6 bg-border" />
-                <div className="h-0 w-0 border-y-[4px] border-l-[6px] border-y-transparent border-l-border" />
+              <div className="flex items-center self-center px-1 py-4">
+                <div className="h-px w-8 border-t border-dashed border-border" />
+                <div className="h-0 w-0 border-y-[3px] border-l-[5px] border-y-transparent border-l-muted-foreground/40" />
               </div>
             )}
             <PipelineStageColumn
diff --git a/apps/web/src/components/pipeline/PipelinePhaseGroup.tsx b/apps/web/src/components/pipeline/PipelinePhaseGroup.tsx
index dfc7536..1f12d31 100644
--- a/apps/web/src/components/pipeline/PipelinePhaseGroup.tsx
+++ b/apps/web/src/components/pipeline/PipelinePhaseGroup.tsx
@@ -1,7 +1,8 @@
-import { useMemo } from "react";
-import { Loader2, Play } from "lucide-react";
-import { StatusDot } from "@/components/StatusDot";
+import { useMemo, useState } from "react";
+import { ChevronDown, Loader2, Play } from "lucide-react";
+import { StatusDot, mapEntityStatus } from "@/components/StatusDot";
 import { trpc } from "@/lib/trpc";
+import { cn } from "@/lib/utils";
 import {
   topologicalSortPhases,
   type DependencyEdge,
@@ -26,9 +27,21 @@ interface PipelinePhaseGroupProps {
   detailAgent?: DetailAgentInfo | null;
 }
 
+const COLLAPSE_THRESHOLD = 5;
+
+const statusBorderColor: Record<string, string> = {
+  active: "border-l-status-active-dot",
+  success: "border-l-status-success-dot",
+  warning: "border-l-status-warning-dot",
+  error: "border-l-status-error-dot",
+  neutral: "border-l-border",
+  urgent: "border-l-status-urgent-dot",
+};
+
 export function PipelinePhaseGroup({ phase, tasks, taskDepsRaw, isBlocked, detailAgent }: PipelinePhaseGroupProps) {
   const approvePhase = trpc.approvePhase.useMutation();
   const queuePhase = trpc.queuePhase.useMutation();
+  const [expanded, setExpanded] = useState(false);
 
   // Sort tasks topologically by dependency order
   const { sorted, blockedByCountMap } = useMemo(() => {
@@ -53,6 +66,10 @@ export function PipelinePhaseGroup({ phase, tasks, taskDepsRaw, isBlocked, detai
     return { sorted: sortedTasks, blockedByCountMap: countMap };
   }, [tasks, taskDepsRaw]);
 
+  const completedCount = tasks.filter((t) => t.status === "completed").length;
+  const totalCount = tasks.length;
+  const progressPct = totalCount > 0 ? (completedCount / totalCount) * 100 : 0;
+
   const hasNonDetailTasks = tasks.length > 0;
   const canExecute =
     (phase.status === "approved" || (phase.status === "pending" && hasNonDetailTasks)) &&
@@ -64,14 +81,32 @@ export function PipelinePhaseGroup({ phase, tasks, taskDepsRaw, isBlocked, detai
     detailAgent?.status === "waiting_for_input";
   const detailDone = detailAgent?.status === "idle";
 
+  const variant = mapEntityStatus(phase.status);
+  const borderClass = statusBorderColor[variant] ?? statusBorderColor.neutral;
+
+  // Collapsible logic
+  const needsCollapse = sorted.length > COLLAPSE_THRESHOLD;
+  const visibleTasks = needsCollapse && !expanded
+    ? sorted.slice(0, COLLAPSE_THRESHOLD)
+    : sorted;
+  const hiddenCount = sorted.length - COLLAPSE_THRESHOLD;
+
   return (
-    <div className="rounded-lg border border-border bg-card overflow-hidden">
+    <div className={cn(
+      "rounded-lg border border-border border-l-2 bg-card overflow-hidden",
+      borderClass,
+    )}>
       {/* Header */}
-      <div className="flex items-center gap-2 px-3 py-2 border-b border-border bg-muted/30">
+      <div className="flex items-center gap-2 px-3 py-2 bg-muted/30">
         <StatusDot status={phase.status} size="sm" />
         <span className="min-w-0 flex-1 truncate text-sm font-medium">
           {phase.name}
         </span>
+        {totalCount > 0 && (
+          <span className="shrink-0 text-[10px] tabular-nums text-muted-foreground">
+            {completedCount}/{totalCount}
+          </span>
+        )}
         {canExecute && (
           <button
             onClick={async () => {
@@ -93,6 +128,21 @@ export function PipelinePhaseGroup({ phase, tasks, taskDepsRaw, isBlocked, detai
         )}
       </div>
 
+      {/* Progress bar */}
+      {totalCount > 0 && (
+        <div className="h-0.5 bg-muted">
+          <div
+            className={cn(
+              "h-full transition-all duration-500 ease-out",
+              completedCount === totalCount
+                ? "bg-status-success-dot"
+                : "bg-status-active-dot",
+            )}
+            style={{ width: `${progressPct}%` }}
+          />
+        </div>
+      )}
+
       {/* Tasks */}
       <div className="py-1">
         {isDetailing ? (
@@ -105,13 +155,27 @@ export function PipelinePhaseGroup({ phase, tasks, taskDepsRaw, isBlocked, detai
         ) : sorted.length === 0 ? (
           <p className="px-3 py-1 text-xs text-muted-foreground">No tasks</p>
         ) : (
-          sorted.map((task) => (
-            <PipelineTaskCard
-              key={task.id}
-              task={task}
-              blockedByCount={blockedByCountMap.get(task.id) ?? 0}
-            />
-          ))
+          <>
+            {visibleTasks.map((task) => (
+              <PipelineTaskCard
+                key={task.id}
+                task={task}
+                blockedByCount={blockedByCountMap.get(task.id) ?? 0}
+              />
+            ))}
+            {needsCollapse && (
+              <button
+                onClick={() => setExpanded((v) => !v)}
+                className="flex w-full items-center gap-1 px-3 py-1 text-[11px] text-muted-foreground hover:text-foreground transition-colors"
+              >
+                <ChevronDown className={cn(
+                  "h-3 w-3 transition-transform",
+                  expanded && "rotate-180",
+                )} />
+                {expanded ? "Show less" : `${hiddenCount} more task${hiddenCount === 1 ? "" : "s"}`}
+              </button>
+            )}
+          </>
         )}
       </div>
     </div>
diff --git a/apps/web/src/components/pipeline/PipelineStageColumn.tsx b/apps/web/src/components/pipeline/PipelineStageColumn.tsx
index 78f7868..a963e15 100644
--- a/apps/web/src/components/pipeline/PipelineStageColumn.tsx
+++ b/apps/web/src/components/pipeline/PipelineStageColumn.tsx
@@ -15,7 +15,7 @@ interface PipelineStageColumnProps {
 
 export function PipelineStageColumn({ phases, tasksByPhase, taskDepsByPhase, blockedPhaseIds, detailAgentByPhase }: PipelineStageColumnProps) {
   return (
-    <div className="flex w-64 shrink-0 flex-col gap-3">
+    <div className="flex w-72 shrink-0 flex-col gap-3">
       {phases.map((phase) => (
         <PipelinePhaseGroup
           key={phase.id}
diff --git a/apps/web/src/components/pipeline/PipelineTaskCard.tsx b/apps/web/src/components/pipeline/PipelineTaskCard.tsx
index 4c5b135..4d1a2b6 100644
--- a/apps/web/src/components/pipeline/PipelineTaskCard.tsx
+++ b/apps/web/src/components/pipeline/PipelineTaskCard.tsx
@@ -34,8 +34,8 @@ export function PipelineTaskCard({ task, blockedByCount = 0 }: PipelineTaskCardP
       />
       <span className="min-w-0 flex-1 truncate text-xs">{task.name}</span>
       {blockedByCount > 0 && (
-        <span className="shrink-0 text-[10px] text-muted-foreground">
-          blocked by {blockedByCount}
+        <span className="shrink-0 rounded-full bg-muted px-1.5 py-px text-[10px] text-muted-foreground">
+          {blockedByCount} dep{blockedByCount === 1 ? "" : "s"}
         </span>
       )}
       {task.status === "pending" && (