diff --git a/hermes_cli/web_server.py b/hermes_cli/web_server.py
index 00d515c7f6170..3ef83ad5efce4 100644
--- a/hermes_cli/web_server.py
+++ b/hermes_cli/web_server.py
@@ -13041,6 +13041,28 @@ def _normalize_dashboard_cron_updates(
     return normalized
 
 
+def _validate_dashboard_cron_bot_chat_deliver(updates: Dict[str, Any]) -> None:
+    """Reject an unresolvable bot-chat profile in ``deliver``/``failure_deliver``.
+
+    The CLI and the ``cronjob`` tool both run every create/update through
+    ``tools.cronjob_tools._validate_bot_chat_deliver`` — a named bot-chat
+    profile must exist on this machine, or the update is rejected up front
+    rather than only failing per-run at ``last_delivery_error`` time. The
+    dashboard's PUT /api/cron/jobs/{job_id} never went through that check
+    for either field (a pre-existing gap the ``deliver`` field already had
+    before ``failure_deliver`` inherited it) — wire it in here so a
+    dashboard-edited job gets the same fail-loud guarantee.
+    """
+    from tools.cronjob_tools import _validate_bot_chat_deliver
+
+    for field in ("deliver", "failure_deliver"):
+        if field not in updates:
+            continue
+        error = _validate_bot_chat_deliver(updates[field])
+        if error:
+            raise HTTPException(status_code=400, detail=error)
+
+
 def _validate_dashboard_cron_context_from(
     refs: Optional[List[str]],
     profile_name: str,
@@ -13416,6 +13438,7 @@ def _update_cron_job_sync(job_id: str, body: CronJobUpdate, profile: Optional[st
             body.updates,
             profile_home,
         )
+        _validate_dashboard_cron_bot_chat_deliver(updates)
         if "context_from" in updates:
             _validate_dashboard_cron_context_from(
                 updates.get("context_from"),
diff --git a/tests/hermes_cli/test_web_server_cron_profiles.py b/tests/hermes_cli/test_web_server_cron_profiles.py
index 3a8bda9a76055..d2d2a73ac8063 100644
--- a/tests/hermes_cli/test_web_server_cron_profiles.py
+++ b/tests/hermes_cli/test_web_server_cron_profiles.py
@@ -1098,6 +1098,86 @@ async def test_update_cron_job_rejects_id_mutation(isolated_profiles, monkeypatc
     assert [job["id"] for job in worker_jobs] == [worker_job["id"]]
 
 
+@pytest.mark.asyncio
+async def test_update_cron_job_rejects_unknown_bot_chat_failure_deliver(
+    isolated_profiles, monkeypatch
+):
+    """The dashboard update lane must reject an unresolvable bot-chat
+    ``failure_deliver`` profile up front, the same as the CLI/tool ``cronjob``
+    update path (tools.cronjob_tools._validate_bot_chat_deliver) already does
+    — not silently persist it and only discover the bad name at 3am when a
+    failure needs to route through it."""
+    from hermes_cli import web_server
+
+    notified_profiles = []
+    monkeypatch.setattr(
+        web_server,
+        "_notify_cron_provider_for_profile",
+        notified_profiles.append,
+    )
+    job = web_server._call_cron_for_profile(
+        "worker_alpha",
+        "create_job",
+        prompt="managed by named profile",
+        schedule="every 1h",
+        name="bad-bot-chat-failure-deliver-job",
+    )
+
+    with pytest.raises(HTTPException) as exc:
+        await web_server.update_cron_job(
+            job["id"],
+            web_server.CronJobUpdate(
+                updates={"failure_deliver": "bot-chat:definitely-not-a-real-profile"}
+            ),
+            profile="worker_alpha",
+        )
+
+    assert exc.value.status_code == 400
+    assert "bot-chat delivery profile" in exc.value.detail
+    assert "not found" in exc.value.detail
+    assert notified_profiles == []
+    persisted = web_server._call_cron_for_profile("worker_alpha", "get_job", job["id"])
+    assert persisted.get("failure_deliver") is None
+
+
+@pytest.mark.asyncio
+async def test_update_cron_job_rejects_unknown_bot_chat_deliver(
+    isolated_profiles, monkeypatch
+):
+    """Same rejection for the older ``deliver`` field — this gap predates
+    failure_deliver, so deliver must be covered too."""
+    from hermes_cli import web_server
+
+    notified_profiles = []
+    monkeypatch.setattr(
+        web_server,
+        "_notify_cron_provider_for_profile",
+        notified_profiles.append,
+    )
+    job = web_server._call_cron_for_profile(
+        "worker_alpha",
+        "create_job",
+        prompt="managed by named profile",
+        schedule="every 1h",
+        name="bad-bot-chat-deliver-job",
+    )
+
+    with pytest.raises(HTTPException) as exc:
+        await web_server.update_cron_job(
+            job["id"],
+            web_server.CronJobUpdate(
+                updates={"deliver": "bot-chat:definitely-not-a-real-profile"}
+            ),
+            profile="worker_alpha",
+        )
+
+    assert exc.value.status_code == 400
+    assert "bot-chat delivery profile" in exc.value.detail
+    assert notified_profiles == []
+    persisted = web_server._call_cron_for_profile("worker_alpha", "get_job", job["id"])
+    assert persisted.get("deliver") == "local"
+
+
 @pytest.mark.asyncio
 async def test_cron_delete_with_profile_deletes_only_target_profile(isolated_profiles):
     from hermes_cli import web_server