diff --git a/console/index.html b/console/index.html
index 5f82f25..f4fab92 100644
--- a/console/index.html
+++ b/console/index.html
@@ -36,6 +36,45 @@
       <section id="fleet-detail" class="fleet-detail-wrap" hidden>
         <div id="fd-header"></div>
         <section id="roster" class="roster-wrap"></section>
+        <section id="agents" class="agents-wrap">
+          <div class="agents-head">
+            <span class="agents-label">agent consoles</span>
+            <span class="agents-sub">select an agent to open its console — chat + read-only config</span>
+          </div>
+          <div id="agent-list" class="agent-list"></div>
+          <div id="agent-console" class="agent-console" hidden>
+            <div class="ac-head">
+              <span class="ac-title">agent console</span>
+              <span class="ac-spacer"></span>
+              <button class="ac-close" type="button" data-action="close-console">Close</button>
+            </div>
+            <div id="ac-config" class="ac-config"></div>
+            <div class="ac-files">
+              <div class="ac-files-head">
+                <span class="ac-files-label">Files</span>
+                <span id="ac-files-title" class="ac-files-title muted"></span>
+              </div>
+              <div class="ac-files-body">
+                <div id="ac-files-list" class="ac-files-list"></div>
+                <div id="ac-files-viewer" class="ac-files-viewer"></div>
+              </div>
+            </div>
+            <div class="ac-chat chat-wrap">
+              <div class="chat-head">
+                <span class="chat-title">Chat</span>
+                <span class="chat-conn" id="ac-chat-conn">disconnected</span>
+              </div>
+              <div id="ac-chat-log" class="chat-log"></div>
+              <form id="ac-chat-form" class="chat-input">
+                <textarea id="ac-chat-text" class="chat-text" rows="2" placeholder="Message this agent…  (Enter to send · Shift+Enter for a newline)"></textarea>
+                <div class="chat-actions">
+                  <button type="button" id="ac-chat-stop" class="chat-btn chat-stop" hidden>Stop</button>
+                  <button type="submit" id="ac-chat-send" class="chat-btn chat-send">Send</button>
+                </div>
+              </form>
+            </div>
+          </div>
+        </section>
       </section>
       <section id="config-editor" class="cfg-editor-wrap" hidden>
         <div class="cfg-editor-head">
@@ -64,45 +103,6 @@
           </div>
         </form>
       </section>
-      <section id="agents" class="agents-wrap">
-        <div class="agents-head">
-          <span class="agents-label">agent consoles</span>
-          <span class="agents-sub">select an agent to open its console — chat + read-only config</span>
-        </div>
-        <div id="agent-list" class="agent-list"></div>
-        <div id="agent-console" class="agent-console" hidden>
-          <div class="ac-head">
-            <span class="ac-title">agent console</span>
-            <span class="ac-spacer"></span>
-            <button class="ac-close" type="button" data-action="close-console">Close</button>
-          </div>
-          <div id="ac-config" class="ac-config"></div>
-          <div class="ac-files">
-            <div class="ac-files-head">
-              <span class="ac-files-label">Files</span>
-              <span id="ac-files-title" class="ac-files-title muted"></span>
-            </div>
-            <div class="ac-files-body">
-              <div id="ac-files-list" class="ac-files-list"></div>
-              <div id="ac-files-viewer" class="ac-files-viewer"></div>
-            </div>
-          </div>
-          <div class="ac-chat chat-wrap">
-            <div class="chat-head">
-              <span class="chat-title">Chat</span>
-              <span class="chat-conn" id="ac-chat-conn">disconnected</span>
-            </div>
-            <div id="ac-chat-log" class="chat-log"></div>
-            <form id="ac-chat-form" class="chat-input">
-              <textarea id="ac-chat-text" class="chat-text" rows="2" placeholder="Message this agent…  (Enter to send · Shift+Enter for a newline)"></textarea>
-              <div class="chat-actions">
-                <button type="button" id="ac-chat-stop" class="chat-btn chat-stop" hidden>Stop</button>
-                <button type="submit" id="ac-chat-send" class="chat-btn chat-send">Send</button>
-              </div>
-            </form>
-          </div>
-        </div>
-      </section>
       <section class="logs">
         <nav class="tabs" id="tabs">
           <button class="tab is-active" data-target="log">Activity</button>
diff --git a/console/src/main.ts b/console/src/main.ts
index eac09e6..5352414 100644
--- a/console/src/main.ts
+++ b/console/src/main.ts
@@ -272,15 +272,23 @@ async function refreshRemote(): Promise<void> {
 
 // The console's top-level drill-down (ADR #83 Part A): Fleets ↔ Fleet detail.
 // `activeFleet === null` shows the Fleets screen (the `#config` list); a
-// selected fleet shows Fleet detail (breadcrumb header + the members roster)
-// instead. This is screen 7.2 vs 7.3 — slice 2's scope; the further drill into
-// an Agent console (7.4) is slice 3.
+// selected fleet shows Fleet detail (breadcrumb header + the members roster,
+// with each member drilling further into its Agent console — slice 3) instead.
 function updateScreen(): void {
   if (configEl) configEl.hidden = activeFleet !== null;
   if (fleetDetailEl) fleetDetailEl.hidden = activeFleet === null;
   if (activeFleet && fdHeaderEl) renderFleetDetailHeader(fdHeaderEl, activeFleet);
 }
 
+// Leaving the fleet (back to Fleets, or switching to another one) also leaves
+// any open Agent console — reuses the console's own wired Close button (see
+// `openAgentForRow`'s note on why: `agentConsole.ts` stays untouched).
+function closeOpenAgentConsole(): void {
+  document
+    .querySelector<HTMLButtonElement>('#agent-console [data-action="close-console"]')
+    ?.click();
+}
+
 // Switch the active fleet by identity (name): re-point every read at its cluster
 // (and thus its bound credential), filter the roster to its members, and refresh
 // immediately — so "switch fleet" == "switch managing account + roster" the ADR
@@ -290,6 +298,7 @@ function selectFleet(name: string): void {
   if (!name || name === activeFleet) return;
   const fleet = fleetConfig?.fleets.find((f) => f.name === name);
   if (!fleet) return;
+  closeOpenAgentConsole();
   activeFleet = name;
   activeCluster = fleet.cluster;
   activeMembers = fleet.members;
@@ -305,6 +314,7 @@ function selectFleet(name: string): void {
 // unfiltered roster (whole default cluster) until another fleet is picked.
 function deselectFleet(): void {
   if (!activeFleet) return;
+  closeOpenAgentConsole();
   activeFleet = null;
   activeCluster = DEFAULT_CLUSTER;
   activeMembers = [];
@@ -316,6 +326,23 @@ function deselectFleet(): void {
   void tick();
 }
 
+// Fleet detail shows either the members roster or the open Agent console, never
+// both (Part A: "the only navigation model," no tab-peer surfaces) — mirror
+// `#agent-console`'s own `hidden` state (owned by `agentConsole.ts`, untouched)
+// onto the roster rather than adding a second source of truth for what's open.
+(function watchAgentConsoleVisibility(): void {
+  const consoleEl = document.getElementById("agent-console");
+  if (!consoleEl || !roster) return;
+  const sync = (): void => {
+    roster.hidden = !consoleEl.hidden;
+  };
+  new MutationObserver(sync).observe(consoleEl, {
+    attributes: true,
+    attributeFilter: ["hidden"],
+  });
+  sync();
+})();
+
 // ---- TOML editor (fleets.toml + remote.toml) ---------------------------------
 // One CodeMirror TOML editor, shared by both config files (which one is set by
 // `editorTarget`). Kept imperative (CM owns real DOM) and separate from the
@@ -604,6 +631,31 @@ async function scale(
   }
 }
 
+// Drill into a roster row's Agent console (ADR #83 slice 3: mockup 7.4). The
+// agent-console shell (`agentConsole.ts`) is untouched — its selector
+// (`#agent-list`, now hidden via CSS in favor of this roster-row entry point)
+// already opens-on-click for a `[data-agent]` button, so reuse that exact,
+// already-tested path via a synthetic click rather than duplicating the
+// open/dial/teardown logic here. Tries the service-name form first, then the
+// short name — the same precedence `filterByMembers` uses for fleet members.
+function openAgentForRow(svc: string, alt: string): void {
+  const btn =
+    document.querySelector<HTMLButtonElement>(
+      `#agent-list [data-agent="${CSS.escape(svc)}"]`,
+    ) ??
+    document.querySelector<HTMLButtonElement>(
+      `#agent-list [data-agent="${CSS.escape(alt)}"]`,
+    );
+  if (btn) {
+    btn.click();
+  } else {
+    note(
+      "info",
+      `agents: no agent console registered for "${svc}" — add it to agents.toml to open one`,
+    );
+  }
+}
+
 // One delegated listener on the roster. Start executes on click; Stop is
 // disruptive (kills the running instance, though reversible), so it arms on the
 // first click and only executes on a confirming second click within 3s — a
@@ -611,7 +663,14 @@ async function scale(
 // roster and would reset an armed button on its own; the 3s timer is tighter.
 if (roster) {
   roster.addEventListener("click", (ev) => {
-    const btn = (ev.target as HTMLElement).closest<HTMLButtonElement>("button.act");
+    const target = ev.target as HTMLElement;
+    const openBtn = target.closest<HTMLButtonElement>("button.row-open");
+    if (openBtn) {
+      const { openAgent, openAgentAlt } = openBtn.dataset;
+      if (openAgent) openAgentForRow(openAgent, openAgentAlt ?? openAgent);
+      return;
+    }
+    const btn = target.closest<HTMLButtonElement>("button.act");
     if (!btn) return;
     const action = btn.dataset.action;
     const { name, namespace } = btn.dataset;
diff --git a/console/src/render.test.ts b/console/src/render.test.ts
index 9dbb61e..913e58c 100644
--- a/console/src/render.test.ts
+++ b/console/src/render.test.ts
@@ -140,6 +140,19 @@ describe("rosterHtml", () => {
     expect(html).not.toContain("act-pending");
     expect(html).toContain('data-action="stop"');
   });
+
+  it("makes each row's name a button carrying both agent-lookup identities (ADR #83 slice 3)", () => {
+    const html = rosterHtml([dep({ name: "orca", namespace: "prod" })]);
+    expect(html).toContain('class="row-open"');
+    expect(html).toContain('data-open-agent="oab-prod-orca"');
+    expect(html).toContain('data-open-agent-alt="orca"');
+  });
+
+  it("escapes the row-open data attributes", () => {
+    const html = rosterHtml([dep({ name: '"x', namespace: "n" })]);
+    expect(html).toContain("&quot;x");
+    expect(html).not.toContain('data-open-agent-alt=""x"');
+  });
 });
 
 describe("deploymentKey", () => {
diff --git a/console/src/render.ts b/console/src/render.ts
index 42a324e..a59b0e7 100644
--- a/console/src/render.ts
+++ b/console/src/render.ts
@@ -57,14 +57,21 @@ function actionButton(d: Deployment, pending: boolean): string {
   return `<button class="${cls}" type="button" data-action="${action}" data-name="${escapeHtml(d.name)}" data-namespace="${escapeHtml(d.namespace)}">${label}</button>`;
 }
 
+// The row's name cell is a button, not plain text — clicking a member drills
+// into its Agent console (ADR #83 slice 3: mockup 7.4), if one is registered.
+// `data-open-agent`/`data-open-agent-alt` carry both candidate identities
+// (service name and short name) the delegated handler tries against the
+// registry, same precedence as `filterByMembers`'s member match.
 function rowHtml(d: Deployment, pending: ReadonlySet<string>): string {
   const phases = d.instances.length
     ? d.instances.map((i) => badge(i.state)).join(" ")
     : `<span class="muted">—</span>`;
   const health = d.ready === d.desired ? "ok" : "warn";
   const name = escapeHtml(`${d.namespace}/${d.name}`);
+  const svc = escapeHtml(serviceName(d));
+  const shortName = escapeHtml(d.name);
   return `<tr>
-      <td class="name">${name}</td>
+      <td class="name"><button class="row-open" type="button" data-open-agent="${svc}" data-open-agent-alt="${shortName}" title="open agent console">${name}</button></td>
       <td class="counts ${health}">${d.ready}/${d.desired}<span class="muted"> · cur ${d.current}</span></td>
       <td class="phases">${phases}</td>
       <td class="actions">${actionButton(d, pending.has(deploymentKey(d)))}</td>
diff --git a/console/src/styles.css b/console/src/styles.css
index cc63d11..77f82ce 100644
--- a/console/src/styles.css
+++ b/console/src/styles.css
@@ -312,6 +312,23 @@ td.name {
   font-weight: 600;
   font-variant-numeric: tabular-nums;
 }
+/* A roster row's name is a button (ADR #83 slice 3) — drills into that
+   member's Agent console. Reset button chrome so it still reads as a name. */
+button.row-open {
+  appearance: none;
+  cursor: pointer;
+  border: 0;
+  background: transparent;
+  color: var(--text);
+  font: inherit;
+  font-weight: 600;
+  font-variant-numeric: tabular-nums;
+  padding: 0;
+}
+button.row-open:hover {
+  color: var(--s-starting);
+  text-decoration: underline;
+}
 td.counts {
   font-variant-numeric: tabular-nums;
 }
@@ -1207,15 +1224,20 @@ button.act:disabled {
   font: inherit;
 }
 
-/* ---- Agent consoles (ADR agent-consoles Parts B/C) ------------------------ */
+/* ---- Agent consoles (ADR agent-consoles Parts B/C; ADR #83 slice 3: reached
+   by drilling into a roster row instead) ------------------------------------ */
 .agents-wrap {
   margin: 0 0 12px;
 }
+/* The flat endpoint selector is superseded as a reachability path by roster
+   rows (`button.row-open`, main.ts's `openAgentForRow`) — kept in the DOM
+   (still rendered by `agentConsole.ts`, untouched) since that's the synthetic
+   click target the roster-row handler reuses; just not shown. */
 .agents-head {
-  display: flex;
-  align-items: baseline;
-  gap: 10px;
-  margin-bottom: 8px;
+  display: none;
+}
+#agent-list {
+  display: none;
 }
 .agents-label {
   font-weight: 600;