diff --git a/chat/templates/_drawer.html b/chat/templates/_drawer.html
index 4ebfc22..6bfb887 100644
--- a/chat/templates/_drawer.html
+++ b/chat/templates/_drawer.html
@@ -43,6 +43,101 @@
     {% endfor %}
   </section>
 
+  {% if guest_bot %}
+  <section class="drawer-section">
+    <h3>Guest</h3>
+    <p><strong>{{ guest_bot.name }}</strong></p>
+    {% if guest_activity %}
+      <p>{{ guest_activity.posture or "—" }} / {{ (guest_activity.action or {}).verb or "—" }}</p>
+      {% if guest_activity.attention %}<p class="muted">attention: {{ guest_activity.attention }}</p>{% endif %}
+      {% if guest_activity.holding %}<p class="muted">holding: {{ guest_activity.holding|join(", ") }}</p>{% endif %}
+    {% else %}
+      <p class="muted">No activity recorded.</p>
+    {% endif %}
+
+    {% if edge_h2g %}
+      <div class="edge-row">
+        <strong>{{ host_bot.name }} &rarr; {{ guest_bot.name }}</strong>
+        <p>Affinity: {{ edge_h2g.affinity }}/100 &middot; Trust: {{ edge_h2g.trust }}/100</p>
+        {% if edge_h2g.knowledge %}
+          <details><summary>Knowledge ({{ edge_h2g.knowledge|length }})</summary>
+            <ul>{% for fact in edge_h2g.knowledge %}<li>{{ fact }}</li>{% endfor %}</ul>
+          </details>
+        {% endif %}
+      </div>
+    {% endif %}
+    {% if edge_g2h %}
+      <div class="edge-row">
+        <strong>{{ guest_bot.name }} &rarr; {{ host_bot.name }}</strong>
+        <p>Affinity: {{ edge_g2h.affinity }}/100 &middot; Trust: {{ edge_g2h.trust }}/100</p>
+        {% if edge_g2h.knowledge %}
+          <details><summary>Knowledge ({{ edge_g2h.knowledge|length }})</summary>
+            <ul>{% for fact in edge_g2h.knowledge %}<li>{{ fact }}</li>{% endfor %}</ul>
+          </details>
+        {% endif %}
+      </div>
+    {% endif %}
+    {% if edge_y2g %}
+      <div class="edge-row">
+        <strong>you &rarr; {{ guest_bot.name }}</strong>
+        <p>Affinity: {{ edge_y2g.affinity }}/100 &middot; Trust: {{ edge_y2g.trust }}/100</p>
+      </div>
+    {% endif %}
+    {% if edge_g2y %}
+      <div class="edge-row">
+        <strong>{{ guest_bot.name }} &rarr; you</strong>
+        <p>Affinity: {{ edge_g2y.affinity }}/100 &middot; Trust: {{ edge_g2y.trust }}/100</p>
+      </div>
+    {% endif %}
+
+    <form class="inline-edit"
+          hx-post="/chats/{{ chat.id }}/drawer/guest/remove"
+          hx-target="#drawer" hx-swap="innerHTML">
+      <button type="submit">Remove guest</button>
+    </form>
+  </section>
+  {% else %}
+  <section class="drawer-section">
+    <h3>Add guest</h3>
+    {% if available_guests %}
+      <form class="inline-edit"
+            hx-post="/chats/{{ chat.id }}/drawer/guest/add"
+            hx-target="#drawer" hx-swap="innerHTML">
+        <label>
+          Bot:
+          <select name="guest_bot_id" required>
+            {% for b in available_guests %}
+              <option value="{{ b.id }}">{{ b.name }}</option>
+            {% endfor %}
+          </select>
+        </label>
+        <label>
+          Have they met before? Describe how (leave blank if not):
+          <textarea name="relationship_prose" rows="3"
+                    placeholder="e.g. Old college friends who studied physics together."></textarea>
+        </label>
+        <button type="submit">Add guest</button>
+      </form>
+    {% else %}
+      <p class="muted">No other bots authored yet.</p>
+    {% endif %}
+  </section>
+  {% endif %}
+
+  {% if group_node %}
+  <section class="drawer-section">
+    <h3>Group</h3>
+    {% if group_node.summary %}
+      <p>{{ group_node.summary }}</p>
+    {% else %}
+      <p class="muted">No group summary yet.</p>
+    {% endif %}
+    {% if group_node.dynamic %}
+      <p class="muted">Dynamic: {{ group_node.dynamic }}</p>
+    {% endif %}
+  </section>
+  {% endif %}
+
   <section class="drawer-section">
     <h3>Edges</h3>
     {% if edge_b2y %}
diff --git a/chat/web/drawer.py b/chat/web/drawer.py
index 3b61e50..d38d850 100644
--- a/chat/web/drawer.py
+++ b/chat/web/drawer.py
@@ -32,9 +32,11 @@ from fastapi.responses import HTMLResponse
 from fastapi.templating import Jinja2Templates
 
 from chat.eventlog.log import append_and_apply
+from chat.services.relationship_seed import seed_inter_bot_edges
 from chat.services.scene_summarize import apply_scene_close_summary
 from chat.state.edges import get_edge
-from chat.state.entities import get_bot, get_you
+from chat.state.entities import get_bot, get_you, list_bots
+from chat.state.group_node import get_group_node
 from chat.state.memory import get_pinned
 from chat.state.world import active_scene, get_activity, get_chat, get_container
 from chat.web.bots import get_conn
@@ -78,6 +80,32 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
     edge_b2y = get_edge(conn, chat["host_bot_id"], "you")
     edge_y2b = get_edge(conn, "you", chat["host_bot_id"])
 
+    # T42: guest + group context. Empty defaults keep the template happy
+    # when no guest is present (the relevant sections render conditionally).
+    guest_bot = None
+    guest_activity = None
+    edge_h2g = None
+    edge_g2h = None
+    edge_y2g = None
+    edge_g2y = None
+    available_guests: list[dict] = []
+    group_node = None
+    if chat.get("guest_bot_id"):
+        guest_bot_id = chat["guest_bot_id"]
+        guest_bot = get_bot(conn, guest_bot_id)
+        guest_activity = get_activity(conn, guest_bot_id)
+        edge_h2g = get_edge(conn, chat["host_bot_id"], guest_bot_id)
+        edge_g2h = get_edge(conn, guest_bot_id, chat["host_bot_id"])
+        edge_y2g = get_edge(conn, "you", guest_bot_id)
+        edge_g2y = get_edge(conn, guest_bot_id, "you")
+    else:
+        # Candidates for the "Add guest" dropdown — every authored bot
+        # except the host (and "you", which is implicit, never a bot row).
+        available_guests = [
+            b for b in list_bots(conn) if b["id"] != chat["host_bot_id"]
+        ]
+    group_node = get_group_node(conn, chat_id)
+
     # Recent memories from host's POV (witness_host = 1), most recent first.
     # Raw query keeps this read self-contained — no projector helper exposes
     # "latest N for an owner" yet and the drawer is the only consumer.
@@ -117,6 +145,14 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
             "bot_activity": bot_activity,
             "edge_b2y": edge_b2y,
             "edge_y2b": edge_y2b,
+            "guest_bot": guest_bot,
+            "guest_activity": guest_activity,
+            "edge_h2g": edge_h2g,
+            "edge_g2h": edge_g2h,
+            "edge_y2g": edge_y2g,
+            "edge_g2y": edge_g2y,
+            "available_guests": available_guests,
+            "group_node": group_node,
             "recent_memories": recent_memories,
             "pinned": pinned,
             "pin_cap": PIN_CAP,
@@ -304,3 +340,187 @@ async def toggle_memory_pin(
         },
     )
     return await drawer(chat_id, request, conn)
+
+
+# --- T42 guest add/remove -------------------------------------------------
+#
+# Adding a guest fans out into up to four events: a ``guest_added`` to flip
+# ``chats.guest_bot_id``, two ``edge_update`` events seeded from the
+# user-supplied prose (skipped when the prose is empty / the seed comes back
+# default), and a ``group_node_initialized`` if no row exists yet — three
+# entities now share the chat so the §8.4 group node becomes meaningful.
+#
+# Removing a guest first emits ``scene_closed`` for the active scene (so any
+# host -> you scene closes cleanly with the guest still in scope) before
+# clearing the guest_bot_id; per spec the next user message implicitly opens
+# a fresh you+host scene via Phase 1's mid-chat reset behavior.
+
+
+def _seed_is_default(seed) -> bool:
+    """Treat a seed as a no-op when both summaries are empty AND both
+    delta pairs are zero AND both fact lists are empty.
+    """
+    return (
+        not seed.a_to_b_summary
+        and not seed.b_to_a_summary
+        and seed.a_to_b_affinity_delta == 0
+        and seed.a_to_b_trust_delta == 0
+        and seed.b_to_a_affinity_delta == 0
+        and seed.b_to_a_trust_delta == 0
+        and not seed.a_to_b_knowledge_facts
+        and not seed.b_to_a_knowledge_facts
+    )
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/guest/add",
+    response_class=HTMLResponse,
+)
+async def add_guest(
+    chat_id: str,
+    request: Request,
+    guest_bot_id: str = Form(...),
+    relationship_prose: str = Form(""),
+    conn=Depends(get_conn),
+    client=Depends(get_llm_client),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if chat.get("guest_bot_id") is not None:
+        raise HTTPException(
+            status_code=400,
+            detail="a guest is already present in this chat",
+        )
+
+    if guest_bot_id == chat["host_bot_id"]:
+        raise HTTPException(
+            status_code=400, detail="guest must differ from host"
+        )
+
+    guest_bot = get_bot(conn, guest_bot_id)
+    if guest_bot is None:
+        raise HTTPException(
+            status_code=404, detail=f"guest bot not found: {guest_bot_id}"
+        )
+
+    host_bot = get_bot(conn, chat["host_bot_id"])
+    if host_bot is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"host bot not found: {chat['host_bot_id']}",
+        )
+
+    settings = request.app.state.settings
+    seed = await seed_inter_bot_edges(
+        client,
+        classifier_model=settings.classifier_model,
+        bot_a_id=chat["host_bot_id"],
+        bot_a_name=host_bot["name"],
+        bot_b_id=guest_bot_id,
+        bot_b_name=guest_bot["name"],
+        relationship_prose=relationship_prose,
+        timeout_s=settings.classifier_timeout_s,
+    )
+
+    append_and_apply(
+        conn,
+        kind="guest_added",
+        payload={"chat_id": chat_id, "guest_bot_id": guest_bot_id},
+    )
+
+    # Emit edge_update only when the seed carries content. Empty prose
+    # short-circuits inside ``seed_inter_bot_edges`` to a default seed,
+    # so this skips the two extra log entries on the no-prose path.
+    # NOTE: ``_apply_edge_update`` does not accept a ``summary`` field —
+    # per-direction summary is set via the per-pov scene-close path
+    # (T27), not direct edge_update. We therefore drop seed.*_summary
+    # here; the deltas + knowledge_facts are what materializes.
+    if not _seed_is_default(seed):
+        append_and_apply(
+            conn,
+            kind="edge_update",
+            payload={
+                "source_id": chat["host_bot_id"],
+                "target_id": guest_bot_id,
+                "chat_id": chat_id,
+                "affinity_delta": seed.a_to_b_affinity_delta,
+                "trust_delta": seed.a_to_b_trust_delta,
+                "knowledge_facts": seed.a_to_b_knowledge_facts,
+                "last_interaction_at": chat.get("time"),
+                "last_interaction_chat_id": chat_id,
+            },
+        )
+        append_and_apply(
+            conn,
+            kind="edge_update",
+            payload={
+                "source_id": guest_bot_id,
+                "target_id": chat["host_bot_id"],
+                "chat_id": chat_id,
+                "affinity_delta": seed.b_to_a_affinity_delta,
+                "trust_delta": seed.b_to_a_trust_delta,
+                "knowledge_facts": seed.b_to_a_knowledge_facts,
+                "last_interaction_at": chat.get("time"),
+                "last_interaction_chat_id": chat_id,
+            },
+        )
+
+    # Three entities now share the chat (you, host, guest) — initialize
+    # the group node row if Wave 1's reader doesn't see one yet.
+    if get_group_node(conn, chat_id) is None:
+        append_and_apply(
+            conn,
+            kind="group_node_initialized",
+            payload={
+                "chat_id": chat_id,
+                "members": ["you", chat["host_bot_id"], guest_bot_id],
+                "summary": "",
+                "dynamic": "",
+                "threads": [],
+            },
+        )
+
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/guest/remove",
+    response_class=HTMLResponse,
+)
+async def remove_guest(
+    chat_id: str,
+    request: Request,
+    conn=Depends(get_conn),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if chat.get("guest_bot_id") is None:
+        raise HTTPException(
+            status_code=400, detail="no guest present in this chat"
+        )
+
+    # Close the active scene (if any) before flipping guest_bot_id so
+    # the scene record carries the guest as a participant.
+    scene = active_scene(conn, chat_id)
+    if scene is not None:
+        append_and_apply(
+            conn,
+            kind="scene_closed",
+            payload={
+                "scene_id": scene["id"],
+                "ended_at": chat.get("time"),
+                "significance": 0,
+            },
+        )
+
+    append_and_apply(
+        conn,
+        kind="guest_removed",
+        payload={"chat_id": chat_id},
+    )
+
+    return await drawer(chat_id, request, conn)
diff --git a/tests/test_drawer_guest.py b/tests/test_drawer_guest.py
new file mode 100644
index 0000000..a599c03
--- /dev/null
+++ b/tests/test_drawer_guest.py
@@ -0,0 +1,322 @@
+"""T42: drawer guest add/remove + render.
+
+The drawer grows a "Guest" section (when a guest bot is present in the
+chat), a "Group" section sourced from the ``group_node`` row, an
+"Add guest" form (visible while no guest is present), and a "Remove
+guest" button (visible while one is). The two new POST endpoints emit
+``guest_added`` / ``guest_removed`` events plus ancillary updates:
+
+* ``POST /chats/{chat_id}/drawer/guest/add`` runs the relationship-seed
+  classifier (T38) over the user-supplied prose and emits an
+  ``edge_update`` per direction when the seed comes back non-default.
+  It also seeds a ``group_node_initialized`` row when none exists yet.
+* ``POST /chats/{chat_id}/drawer/guest/remove`` first emits
+  ``scene_closed`` for the active scene so the host -> you scene closes
+  cleanly before the guest leaves.
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+
+from chat.app import app
+from chat.db.connection import open_db
+from chat.eventlog.log import append_event
+from chat.eventlog.projector import project
+from chat.llm.mock import MockLLMClient
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    cfg = tmp_path / "config.toml"
+    cfg.write_text('featherless_api_key = "test"\n')
+    monkeypatch.setenv("CHAT_CONFIG_PATH", str(cfg))
+    db = tmp_path / "test.db"
+    monkeypatch.setenv("CHAT_DB_PATH", str(db))
+    with TestClient(app) as c:
+        if hasattr(app.state, "background_worker"):
+            app.state.background_worker.enabled = False
+        yield c
+
+
+def _bot_payload(bot_id: str, name: str) -> dict:
+    return {
+        "id": bot_id,
+        "name": name,
+        "persona": "...",
+        "voice_samples": [],
+        "traits": [],
+        "backstory": "",
+        "initial_relationship_to_you": "",
+        "kickoff_prose": "",
+    }
+
+
+def _seed_chat(db: Path, *, with_scene: bool = True) -> None:
+    """Seed a chat hosted by ``bot_a`` (with ``bot_b`` authored as a
+    candidate guest) and, by default, an open scene so the
+    ``guest_removed`` flow has something to close.
+    """
+    with open_db(db) as conn:
+        append_event(conn, kind="bot_authored", payload=_bot_payload("bot_a", "BotA"))
+        append_event(conn, kind="bot_authored", payload=_bot_payload("bot_b", "BotB"))
+        append_event(
+            conn,
+            kind="you_authored",
+            payload={"name": "Me", "pronouns": "they/them", "persona": ""},
+        )
+        append_event(
+            conn,
+            kind="chat_created",
+            payload={
+                "id": "chat_bot_a",
+                "host_bot_id": "bot_a",
+                "initial_time": "2026-04-26T20:00:00+00:00",
+                "narrative_anchor": "Day 1",
+                "weather": "",
+            },
+        )
+        if with_scene:
+            append_event(
+                conn,
+                kind="scene_opened",
+                payload={
+                    "chat_id": "chat_bot_a",
+                    "container_id": None,
+                    "started_at": "2026-04-26T20:00:00+00:00",
+                    "participants": ["you", "bot_a"],
+                },
+            )
+        project(conn)
+
+
+def _override_llm(canned: list[str]):
+    """Wire a ``MockLLMClient`` into the drawer's LLM dependency."""
+    from chat.web.kickoff import get_llm_client
+
+    app.dependency_overrides[get_llm_client] = lambda: MockLLMClient(
+        canned=list(canned)
+    )
+
+
+def test_drawer_no_guest_omits_guest_section(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    response = client.get("/chats/chat_bot_a/drawer")
+    assert response.status_code == 200
+    body = response.text
+    # No guest-section header; the "Add guest" form should be visible instead.
+    assert "<h3>Guest</h3>" not in body
+    assert "Add guest" in body
+
+
+def test_drawer_add_guest_seeds_edges_and_group_node(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    canned = json.dumps(
+        {
+            "a_to_b_summary": "old college friend",
+            "a_to_b_knowledge_facts": ["studied physics together"],
+            "a_to_b_affinity_delta": 4,
+            "a_to_b_trust_delta": -1,
+            "b_to_a_summary": "former roommate",
+            "b_to_a_knowledge_facts": ["lived together junior year"],
+            "b_to_a_affinity_delta": 3,
+            "b_to_a_trust_delta": 0,
+        }
+    )
+    _override_llm([canned])
+    try:
+        response = client.post(
+            "/chats/chat_bot_a/drawer/guest/add",
+            data={
+                "guest_bot_id": "bot_b",
+                "relationship_prose": (
+                    "Alice and Bob met in college and studied physics together."
+                ),
+            },
+        )
+        assert response.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
+
+    with open_db(tmp_path / "test.db") as conn:
+        from chat.state.edges import get_edge
+        from chat.state.group_node import get_group_node
+        from chat.state.world import get_chat
+
+        chat = get_chat(conn, "chat_bot_a")
+        assert chat["guest_bot_id"] == "bot_b"
+
+        edge_a_to_b = get_edge(conn, "bot_a", "bot_b")
+        edge_b_to_a = get_edge(conn, "bot_b", "bot_a")
+        # Seed deltas applied around the 50/50 default.
+        assert edge_a_to_b["affinity"] == 54
+        assert edge_a_to_b["trust"] == 49
+        assert "studied physics together" in edge_a_to_b["knowledge"]
+        assert edge_b_to_a["affinity"] == 53
+        assert edge_b_to_a["trust"] == 50
+        assert "lived together junior year" in edge_b_to_a["knowledge"]
+
+        group = get_group_node(conn, "chat_bot_a")
+        assert group is not None
+        assert set(group["members"]) == {"you", "bot_a", "bot_b"}
+
+
+def test_drawer_add_guest_empty_prose_skips_edge_update(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    # No canned responses: the seed function short-circuits on empty prose
+    # so no LLM call should happen.
+    _override_llm([])
+    try:
+        response = client.post(
+            "/chats/chat_bot_a/drawer/guest/add",
+            data={"guest_bot_id": "bot_b", "relationship_prose": "   "},
+        )
+        assert response.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
+
+    with open_db(tmp_path / "test.db") as conn:
+        from chat.state.world import get_chat
+
+        chat = get_chat(conn, "chat_bot_a")
+        assert chat["guest_bot_id"] == "bot_b"
+
+        # guest_added fires but no edge_update events between bot_a and bot_b.
+        added = conn.execute(
+            "SELECT COUNT(*) FROM event_log WHERE kind = 'guest_added'"
+        ).fetchone()[0]
+        assert added == 1
+
+        edge_updates = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'edge_update'"
+        ).fetchall()
+        for (payload_json,) in edge_updates:
+            payload = json.loads(payload_json)
+            pair = {payload.get("source_id"), payload.get("target_id")}
+            assert pair != {"bot_a", "bot_b"}, (
+                "no edge_update should be emitted between host and guest "
+                "when prose is empty"
+            )
+
+
+def test_drawer_add_guest_when_already_present_returns_400(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    # Pre-attach a guest directly via append_and_apply so we don't replay
+    # the prior chat_created (which would violate UNIQUE on chats.id).
+    from chat.eventlog.log import append_and_apply
+
+    with open_db(tmp_path / "test.db") as conn:
+        append_and_apply(
+            conn,
+            kind="bot_authored",
+            payload=_bot_payload("bot_c", "BotC"),
+        )
+        append_and_apply(
+            conn,
+            kind="guest_added",
+            payload={"chat_id": "chat_bot_a", "guest_bot_id": "bot_b"},
+        )
+
+    _override_llm([])
+    try:
+        response = client.post(
+            "/chats/chat_bot_a/drawer/guest/add",
+            data={"guest_bot_id": "bot_c", "relationship_prose": ""},
+        )
+        assert response.status_code == 400
+    finally:
+        app.dependency_overrides.clear()
+
+
+def test_drawer_remove_guest_clears_and_closes_scene(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    from chat.eventlog.log import append_and_apply
+
+    with open_db(tmp_path / "test.db") as conn:
+        append_and_apply(
+            conn,
+            kind="guest_added",
+            payload={"chat_id": "chat_bot_a", "guest_bot_id": "bot_b"},
+        )
+
+    response = client.post("/chats/chat_bot_a/drawer/guest/remove")
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        from chat.state.world import active_scene, get_chat
+
+        chat = get_chat(conn, "chat_bot_a")
+        assert chat["guest_bot_id"] is None
+        assert active_scene(conn, "chat_bot_a") is None
+
+        kinds = [
+            row[0]
+            for row in conn.execute(
+                "SELECT kind FROM event_log ORDER BY id"
+            ).fetchall()
+        ]
+        # scene_closed must precede guest_removed in the log.
+        assert "scene_closed" in kinds
+        assert "guest_removed" in kinds
+        assert kinds.index("scene_closed") < kinds.index("guest_removed")
+
+
+def test_drawer_with_guest_renders_guest_and_group_sections(client, tmp_path):
+    _seed_chat(tmp_path / "test.db")
+    from chat.eventlog.log import append_and_apply
+
+    with open_db(tmp_path / "test.db") as conn:
+        append_and_apply(
+            conn,
+            kind="guest_added",
+            payload={"chat_id": "chat_bot_a", "guest_bot_id": "bot_b"},
+        )
+        # Activity for the guest so the section has content to render.
+        append_and_apply(
+            conn,
+            kind="activity_change",
+            payload={
+                "entity_id": "bot_b",
+                "posture": "leaning",
+                "action": {"verb": "smirking"},
+                "attention": "BotA",
+            },
+        )
+        # Edges in all four directions involving the guest.
+        for src, tgt in (("bot_a", "bot_b"), ("bot_b", "bot_a"), ("you", "bot_b"), ("bot_b", "you")):
+            append_and_apply(
+                conn,
+                kind="edge_update",
+                payload={
+                    "source_id": src,
+                    "target_id": tgt,
+                    "chat_id": "chat_bot_a",
+                    "affinity_delta": 1,
+                },
+            )
+        append_and_apply(
+            conn,
+            kind="group_node_initialized",
+            payload={
+                "chat_id": "chat_bot_a",
+                "members": ["you", "bot_a", "bot_b"],
+                "summary": "Three friends catching up over drinks.",
+                "dynamic": "warm and conspiratorial",
+            },
+        )
+
+    response = client.get("/chats/chat_bot_a/drawer")
+    assert response.status_code == 200
+    body = response.text
+    assert "<h3>Guest</h3>" in body
+    assert "BotB" in body
+    assert "smirking" in body
+    assert "<h3>Group</h3>" in body
+    assert "Three friends catching up over drinks." in body
+    assert "warm and conspiratorial" in body
+    # "Remove guest" button is visible when a guest is present.
+    assert "Remove guest" in body