diff --git a/api/agents.py.dox.md b/api/agents.py.dox.md
index e7f6895ac..567e075fc 100644
--- a/api/agents.py.dox.md
+++ b/api/agents.py.dox.md
@@ -20,6 +20,8 @@
 - Update this file whenever request payloads, authentication or CSRF requirements, response shapes, route side effects, or WebSocket event contracts change.
 - `Agents` is an `ApiHandler`.
 - `Agents` defines `process(...)`.
+- The response uses the shared `subagents.get_all_agents_list()` presentation
+  catalog; profile visibility rules belong to that helper.
 - Imported dependency areas include: `helpers`, `helpers.api`.
 
 ## Key Concepts
diff --git a/helpers/integration_commands.py.dox.md b/helpers/integration_commands.py.dox.md
index ec3266fb0..86795ec28 100644
--- a/helpers/integration_commands.py.dox.md
+++ b/helpers/integration_commands.py.dox.md
@@ -20,7 +20,9 @@
 - Update this file whenever public functions, classes, persistence behavior, path/security assumptions, side effects, or cross-module contracts change.
 - Observed side-effect areas: filesystem writes, model calls, plugin state, settings/state persistence.
 - Imported dependency areas include: `__future__`, `helpers`, `helpers.persist_chat`, `helpers.state_monitor_integration`, `plugins._model_config.helpers`, `re`, `typing`.
-- `/agent` switches the top-level chat profile and preserves existing subordinate agent profiles.
+- `/agent` switches the top-level chat profile and preserves existing
+  subordinate agent profiles. Choices come from the shared presentation
+  catalog, though status may report an existing chat using the utility profile.
 - `/model <preset>` stores a per-chat global preset reference, `/model inherit` clears it, and status always reports the effective scoped-or-chat preset. `Default` is a real selectable preset, not an alias for clearing the chat selection.
 
 ## Key Concepts
diff --git a/helpers/settings.py b/helpers/settings.py
index de7b50bb0..9eabff9ee 100644
--- a/helpers/settings.py
+++ b/helpers/settings.py
@@ -263,6 +263,7 @@ def convert_out(settings: Settings) -> SettingsOutput:
                 for key, item in sorted(
                     subagents.get_available_agents_dict(None).items()
                 )
+                if key != "default"
             ],
             knowledge_subdirs=[{"value": subdir, "label": subdir}
                 for subdir in files.get_subdirectories("knowledge", exclude="default")],
@@ -288,7 +289,7 @@ def convert_out(settings: Settings) -> SettingsOutput:
     }
 
     current_profile = current.get("agent_profile")
-    if current_profile and not any(
+    if current_profile and current_profile != "default" and not any(
         option["value"] == current_profile
         for option in additional["agent_subdirs"]
     ):
diff --git a/helpers/settings.py.dox.md b/helpers/settings.py.dox.md
index 413f267f9..aaf5b3812 100644
--- a/helpers/settings.py.dox.md
+++ b/helpers/settings.py.dox.md
@@ -69,7 +69,8 @@
 - `ui_control_visibility` stores validated mobile and desktop visibility flags for the project selector, clock, connection status, and right canvas rail; missing or malformed values fall back per device.
 - The Global default-profile selector lists only globally available profiles.
   A currently configured unavailable profile remains visible with an explicit
-  unavailable label so settings can round-trip it truthfully.
+  unavailable label so settings can round-trip it truthfully, except that the
+  exact `default` utility profile is never offered as a selectable option.
 - Keep request/response, tool, or helper semantics documented here at the same time as source changes.
 
 ## Work Guidance
diff --git a/helpers/subagents.py b/helpers/subagents.py
index db4de677a..dbb9575f4 100644
--- a/helpers/subagents.py
+++ b/helpers/subagents.py
@@ -300,11 +300,11 @@ def get_all_agents_list() -> list[dict[str, str]]:
             else:
                 merged[name] = item
 
-    result: list[dict[str, str]] = []
-    for key in sorted(merged.keys()):
-        item = merged[key]
-        result.append({"key": key, "label": item.title or key})
-    return result
+    return [
+        {"key": key, "label": item.title or key}
+        for key, item in sorted(merged.items())
+        if key != "default"
+    ]
 
 
 def get_default_promp_file_names() -> list[str]:
diff --git a/helpers/subagents.py.dox.md b/helpers/subagents.py.dox.md
index 03830b28e..4ae967cb8 100644
--- a/helpers/subagents.py.dox.md
+++ b/helpers/subagents.py.dox.md
@@ -51,6 +51,8 @@
   title fallbacks do not become authored overrides.
 - Available-profile resolution includes definitions from the selected project,
   then applies that project's sparse `agents.json` availability overrides.
+- `get_all_agents_list()` is the shared presentation catalog and omits the exact
+  `default` utility profile. Runtime discovery and loading remain unchanged.
 - Bundled directories require an authored profile definition; the `_example`
   reference directory is never selectable. Every real profile, including
   `Default`, follows the same Global and project availability rules.
diff --git a/plugins/_a0_connector/AGENTS.md b/plugins/_a0_connector/AGENTS.md
index 462af9153..26404965d 100644
--- a/plugins/_a0_connector/AGENTS.md
+++ b/plugins/_a0_connector/AGENTS.md
@@ -56,6 +56,8 @@
 - Model preset definitions exposed through v1 are global; project arguments select scope but never create project-owned definitions. Model switcher state reports the effective main, utility, and embedding models and preserves embedding-change notifications.
 - The protected v1 `agent_editor` route delegates to the bundled Agent Editor
   API and must not define another profile schema or write profile files itself.
+- The protected v1 `agents_list` response uses the shared agent presentation
+  catalog rather than applying connector-specific visibility rules.
 - Computer Use receipts describe transport success unless the connector returns explicit effect evidence. Linux target-bound typing requires a verified active/focused `window_id`; window activation uses focus, never a press action on an application or window node. Do not retry an identical failed Computer Use call.
 
 ## Work Guidance
diff --git a/plugins/_model_config/AGENTS.md b/plugins/_model_config/AGENTS.md
index 6c2abc172..a50814fd2 100644
--- a/plugins/_model_config/AGENTS.md
+++ b/plugins/_model_config/AGENTS.md
@@ -28,7 +28,11 @@
 - `modelConfig.createPresetEditor()` owns local preset drafts, row actions, and stable UI-only row keys so deletion or renaming cannot rebind nested model fields.
 - The preset editor maps each model provider's API-key field to the shared API-key store; saving the editor persists dirty keys separately and never writes secrets into preset YAML.
 - The compact chat selector label combines the effective preset with only the leaf name of its main model; utility and provider text stay out of the closed selector.
-- The adjacent agent-profile selector reads the always-enabled Agent Editor list endpoint directly so the active profile shows its effective title and avatar, and omits profiles disabled in the chat's current scope.
+- The adjacent agent-profile selector reads the always-enabled Agent Editor list
+  endpoint directly so the active profile shows its effective title and avatar,
+  and omits profiles disabled in the chat's current scope plus the exact
+  `default` utility profile. A chat already using `default` may still show that
+  current status without adding a selectable or editable row.
 - Reload the agent-profile selector catalog when a chat changes project or
   active profile so project-only profiles never linger in the visible choices.
 - When forced agent-profile catalog loads overlap, only the newest request may
diff --git a/plugins/_model_config/webui/switcher-mixin.js b/plugins/_model_config/webui/switcher-mixin.js
index d4df9fa42..9ec17dcf8 100644
--- a/plugins/_model_config/webui/switcher-mixin.js
+++ b/plugins/_model_config/webui/switcher-mixin.js
@@ -51,7 +51,7 @@ export const switcherMethods = {
       });
       if (requestSeq !== this.agentProfilesLoadSeq) return this.agentProfiles;
       this.agentProfiles = (data.profiles || [])
-        .filter(profile => profile.id && profile.id !== "_example" && profile.enabled !== false)
+        .filter(profile => profile.id && !["_example", "default"].includes(profile.id) && profile.enabled !== false)
         .map(profile => ({
           key: profile.id,
           label: profile.title || profile.id,
@@ -127,7 +127,7 @@ export const switcherMethods = {
 
   getAgentProfileList(activeKey = "", activeLabel = "") {
     const profiles = [...(this.agentProfiles || [])];
-    if (activeKey && !profiles.some(profile => profile.key === activeKey)) {
+    if (activeKey && activeKey !== "default" && !profiles.some(profile => profile.key === activeKey)) {
       profiles.unshift({ key: activeKey, label: activeLabel || activeKey });
     }
     return profiles;
diff --git a/plugins/_telegram_integration/AGENTS.md b/plugins/_telegram_integration/AGENTS.md
index 3b36cb663..256ac1ee6 100644
--- a/plugins/_telegram_integration/AGENTS.md
+++ b/plugins/_telegram_integration/AGENTS.md
@@ -16,7 +16,10 @@
 - Treat bot tokens, chat IDs, attachments, and user data as sensitive.
 - Keep allowed-user, group-mode, project, model, and `/send` controls enforced.
 - Install Telegram dependencies into the framework runtime only when required.
-- Agent profile picker actions change the top-level chat profile and must preserve existing subordinate agent profiles.
+- Agent profile picker actions change the top-level chat profile and must
+  preserve existing subordinate agent profiles. Picker rows and direct matches
+  use the shared presentation catalog while current status may still report an
+  existing chat that uses the utility profile.
 - Model picker status shows the effective preset; clearing a chat override returns to its scoped preset rather than assuming `Default`.
 
 ## Work Guidance
diff --git a/tests/test_agent_editor.py b/tests/test_agent_editor.py
index 1cf70bf24..fd0025127 100644
--- a/tests/test_agent_editor.py
+++ b/tests/test_agent_editor.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 from io import BytesIO
 import json
 from pathlib import Path
@@ -1082,7 +1083,10 @@ def test_settings_default_profile_catalog_uses_global_availability(
         lambda _project: {
             "default": settings.subagents.SubAgentListItem(
                 name="default", title="Default"
-            )
+            ),
+            "agent0": settings.subagents.SubAgentListItem(
+                name="agent0", title="Agent 0"
+            ),
         },
     )
     configured = settings.get_default_settings().copy()
@@ -1091,7 +1095,7 @@ def test_settings_default_profile_catalog_uses_global_availability(
     options = settings.convert_out(configured)["additional"]["agent_subdirs"]
 
     assert options == [
-        {"value": "default", "label": "Default"},
+        {"value": "agent0", "label": "Agent 0"},
         {
             "value": "disabled-profile",
             "label": "disabled-profile (unavailable)",
@@ -1099,6 +1103,30 @@ def test_settings_default_profile_catalog_uses_global_availability(
     ]
 
 
+def test_shared_profile_catalog_drives_generic_and_web_selectors(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    from api import agents
+    from helpers import integration_commands, subagents
+
+    profiles = [{"key": "agent0", "label": "Agent 0"}]
+    monkeypatch.setattr(subagents, "get_all_agents_list", lambda: profiles)
+
+    handler = agents.Agents.__new__(agents.Agents)
+    response = asyncio.run(handler.process({"action": "list"}, None))
+    assert [item["key"] for item in response["data"]] == ["agent0"]
+
+    context = SimpleNamespace(
+        agent0=SimpleNamespace(config=SimpleNamespace(profile="default")),
+        is_running=lambda: False,
+    )
+    status = integration_commands._handle_agent(context, "")
+    assert "Current agent: default" in status
+    assert "Agent 0 (agent0)" in status
+    assert "Default (default)" not in status
+    assert "was not found" in integration_commands._handle_agent(context, "default")
+
+
 @pytest.mark.parametrize(
     ("relative_path", "patch", "label"),
     (
diff --git a/tests/test_subagent_metadata_merge.py b/tests/test_subagent_metadata_merge.py
index db82950d3..459653d3f 100644
--- a/tests/test_subagent_metadata_merge.py
+++ b/tests/test_subagent_metadata_merge.py
@@ -132,3 +132,15 @@ def test_available_agents_include_project_profiles_and_project_overrides(
 
     assert requested == ["demo"]
     assert list(available) == ["project-only"]
+
+
+def test_all_agents_list_omits_default_utility_profile(
+    tmp_path: Path, monkeypatch
+) -> None:
+    root = tmp_path / "agents"
+    _write_profile(root, "default", "title: Default\n")
+    _write_profile(root, "agent0", "title: Agent 0\n")
+    monkeypatch.setattr(subagents, "get_agents_roots", lambda: [str(root)])
+
+    assert "default" in subagents._get_agents_list_from_dir(str(root), "default")
+    assert subagents.get_all_agents_list() == [{"key": "agent0", "label": "Agent 0"}]