diff --git a/clarity.controlplane/src/index.css b/clarity.controlplane/src/index.css
index b563624..e1feaa3 100644
--- a/clarity.controlplane/src/index.css
+++ b/clarity.controlplane/src/index.css
@@ -804,30 +804,116 @@ body {
 
 .opc-sdlc-pipeline {
   display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-  gap: 0.2rem;
-  margin-bottom: 0.35rem;
-}
-
-.opc-sdlc-stage-item {
-  display: flex;
-  align-items: center;
-  gap: 0.2rem;
+  align-items: flex-start;
+  flex-wrap: nowrap;
+  gap: 0;
+  overflow-x: auto;
+  padding-bottom: 0.25rem;
 }
 
 .opc-sdlc-arrow {
   color: #8f99a8;
-  font-size: 0.8rem;
+  font-size: 1rem;
   font-weight: 600;
-  margin: 0 0.1rem;
+  flex-shrink: 0;
+  align-self: center;
+  margin: 0 0.4rem;
   user-select: none;
 }
 
-.opc-sdlc-furthest {
-  font-size: 0.75rem;
+/* Individual branch box */
+.opc-sdlc-box {
+  flex: 1 1 140px;
+  min-width: 130px;
+  max-width: 200px;
+  display: flex;
+  flex-direction: column;
+  border: 1px solid #dce0e6;
+  border-radius: 6px;
+  background: #fff;
+  overflow: hidden;
+  flex-shrink: 0;
+}
+
+.opc-sdlc-box--reached {
+  border-width: 2px;
+}
+
+.opc-sdlc-box-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0.3rem 0.5rem;
+  background: #f6f7f9;
+  border-bottom: 1px solid #e5e8eb;
+  flex-shrink: 0;
+}
+
+.opc-sdlc-box-count {
+  font-size: 0.68rem;
   color: #738091;
-  margin-top: 0.3rem;
+  background: #e5e8eb;
+  border-radius: 10px;
+  padding: 0 6px;
+  line-height: 1.5;
+}
+
+/* Scrollable body */
+.opc-sdlc-box-body {
+  flex: 1;
+  overflow-y: auto;
+  max-height: 140px;
+  min-height: 60px;
+  padding: 0.3rem 0.4rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.15rem;
+}
+
+.opc-sdlc-sha-row {
+  display: flex;
+  align-items: baseline;
+  gap: 0.35rem;
+  padding: 0.1rem 0.2rem;
+  border-radius: 3px;
+  opacity: 0.35;
+}
+
+.opc-sdlc-sha-row--reached {
+  opacity: 1;
+}
+
+.opc-sdlc-sha {
+  font-family: 'Consolas', 'Courier New', monospace;
+  font-size: 0.7rem;
+  color: #2d72d2;
+  flex-shrink: 0;
+}
+
+.opc-sdlc-sha-msg {
+  font-size: 0.68rem;
+  color: #4a5568;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  flex: 1;
+  min-width: 0;
+}
+
+.opc-sdlc-box-empty {
+  font-size: 0.7rem;
+  color: #a3acb6;
+  font-style: italic;
+  padding: 0.2rem 0;
+}
+
+.opc-sdlc-box-pending {
+  font-size: 0.68rem;
+  color: #a3acb6;
+  font-style: italic;
+  margin-top: auto;
+  padding-top: 0.25rem;
+  border-top: 1px dashed #e5e8eb;
 }
 
 /* Commits section labels */
diff --git a/clarity.controlplane/src/opc/OpcPage.tsx b/clarity.controlplane/src/opc/OpcPage.tsx
index 920f4f9..82df434 100644
--- a/clarity.controlplane/src/opc/OpcPage.tsx
+++ b/clarity.controlplane/src/opc/OpcPage.tsx
@@ -1,4 +1,4 @@
-import { useState, useMemo, useEffect, useCallback } from 'react';
+import { useState, useMemo, useEffect, useCallback, Fragment } from 'react';
 import { GitCommitDrawer } from '../components/GitCommitDrawer';
 import {
   Button, Callout, Divider, Drawer, FormGroup,
@@ -79,15 +79,6 @@ const SDLC_STAGES: { branch: string; label: string; intent: Intent }[] = [
   { branch: 'main',    label: 'Production', intent: Intent.SUCCESS  },
 ];
 
-function deriveSdlcSummary(coverage: BranchCoverage[]): { label: string; intent: Intent } | null {
-  for (let i = SDLC_STAGES.length - 1; i >= 0; i--) {
-    const stage = SDLC_STAGES[i];
-    const hit = coverage.find(c => c.branch === stage.branch);
-    if (hit?.contains) return { label: stage.label, intent: stage.intent };
-  }
-  return null;
-}
-
 // Aggregate per-repo branch coverage into a single view.
 // A stage is "reached" only when every repo that recognised at least one hash
 // reports contains=true for that branch. Repos that recognised no hashes are
@@ -487,42 +478,48 @@ function CommitsTab({ opc, isActive }: { opc: Opc; isActive: boolean }) {
 
       {/* SDLC Delivery Chain */}
       {coverage.length > 0 && (() => {
-        const summary = deriveSdlcSummary(coverage);
+        const allCommits = [
+          ...autoCommits,
+          ...pinned.map(p => ({ repoKey: 'pinned', hash: p.hash, shortHash: p.shortHash, author: p.pinnedBy, date: p.pinnedAt, subject: p.subject, files: [] })),
+        ].filter((c, i, a) => a.findIndex(x => x.hash === c.hash) === i);
+
         return (
           <div className="opc-delivery-chain">
-            <div className="opc-field-label" style={{ marginBottom: '0.6rem' }}>Delivery Chain</div>
+            <div className="opc-field-label" style={{ marginBottom: '0.75rem' }}>Delivery Chain</div>
             <div className="opc-sdlc-pipeline">
               {SDLC_STAGES.map((stage, i) => {
-                const hit = coverage.find(c => c.branch === stage.branch);
+                const hit     = coverage.find(c => c.branch === stage.branch);
                 const reached = hit?.contains ?? false;
                 return (
-                  <div key={stage.branch} className="opc-sdlc-stage-item">
+                  <Fragment key={stage.branch}>
                     {i > 0 && <span className="opc-sdlc-arrow">→</span>}
-                    <Tooltip content={
-                      reached
-                        ? `All linked commits have reached ${stage.label}`
-                        : hit
-                          ? `Not all linked commits have reached ${stage.label} yet`
-                          : `${stage.label} branch not found locally`
-                    }>
-                      <Tag
-                        intent={reached ? stage.intent : Intent.NONE}
-                        icon={reached ? 'tick-circle' : 'circle'}
-                        minimal={!reached}
-                        round
-                      >
-                        {stage.label}
-                      </Tag>
-                    </Tooltip>
-                  </div>
+                    <div className={`opc-sdlc-box${reached ? ' opc-sdlc-box--reached' : ''}`} style={{ borderColor: reached ? SDLC_STAGES[i].intent === 'primary' ? '#2d72d2' : SDLC_STAGES[i].intent === 'warning' ? '#c87619' : SDLC_STAGES[i].intent === 'danger' ? '#ac2f33' : '#1c6e42' : '#dce0e6' }}>
+                      {/* Box header */}
+                      <div className="opc-sdlc-box-header">
+                        <Tag intent={reached ? stage.intent : Intent.NONE} minimal={!reached} round style={{ fontWeight: 600, fontSize: '0.72rem' }}>
+                          {stage.label}
+                        </Tag>
+                        {reached && <span className="opc-sdlc-box-count">{allCommits.length}</span>}
+                      </div>
+                      {/* Scrollable SHA list */}
+                      <div className="opc-sdlc-box-body">
+                        {allCommits.length === 0 ? (
+                          <span className="opc-sdlc-box-empty">No linked commits</span>
+                        ) : allCommits.map(c => (
+                          <div key={c.hash} className={`opc-sdlc-sha-row${reached ? ' opc-sdlc-sha-row--reached' : ''}`} title={c.subject}>
+                            <code className="opc-sdlc-sha">{c.shortHash}</code>
+                            <span className="opc-sdlc-sha-msg">{c.subject}</span>
+                          </div>
+                        ))}
+                        {!reached && allCommits.length > 0 && (
+                          <div className="opc-sdlc-box-pending">Not yet promoted</div>
+                        )}
+                      </div>
+                    </div>
+                  </Fragment>
                 );
               })}
             </div>
-            {summary && (
-              <div className="opc-sdlc-furthest">
-                Furthest: <strong>{summary.label}</strong>
-              </div>
-            )}
           </div>
         );
       })()}