diff --git a/CHANGELOG.md b/CHANGELOG.md
index 658ef4d85..1eb9d5082 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,11 @@
 
 ## [Unreleased]
 
-## [v0.51.439] — 2026-06-15 — Release OZ (Insights dashboard polish)
+## [v0.51.440] — 2026-06-15 — Release PA (advanced per-model options + auxiliary model routing)
+
+### Added
+
+- **Advanced model options and auxiliary model routing in Settings → Preferences.** A gear button next to the main model selector opens a "Main model options" dialog (Base URL override, Extra body JSON merged into the request, API key override — all the fields that actually take effect). An "Auxiliary Models" section lets you route side-tasks (vision, compression, web-extract, session-search, approval, MCP, title-generation, skills-hub, curator, kanban-decomposer, profile-describer, triage-specifier) to specific models/providers, each with its own advanced options (including per-task timeout / download-timeout / max-concurrency). API keys are write-only (never echoed back), `extra_body` must be a valid JSON object (malformed input is rejected with a 400), and the main model's `extra_body` is now passed through to the agent at request time via `request_overrides`. (#3097)
 
 ### Changed
 
diff --git a/api/config.py b/api/config.py
index 2e648ce34..f539b5215 100644
--- a/api/config.py
+++ b/api/config.py
@@ -3056,7 +3056,78 @@ def set_reasoning_effort(
     )
 
 
-def set_hermes_default_model(model_id: str) -> dict:
+def _public_advanced_model_options(model_cfg: dict) -> dict:
+    """Return write-only-safe advanced options from a model config block."""
+    if not isinstance(model_cfg, dict):
+        model_cfg = {}
+    return {
+        "base_url": str(model_cfg.get("base_url") or "").strip(),
+        "timeout": model_cfg.get("timeout", ""),
+        "download_timeout": model_cfg.get("download_timeout", ""),
+        "max_concurrency": model_cfg.get("max_concurrency", ""),
+        "extra_body": model_cfg.get("extra_body") if isinstance(model_cfg.get("extra_body"), dict) else {},
+        "api_key_set": bool(str(model_cfg.get("api_key") or "").strip()),
+    }
+
+
+def _main_model_request_overrides(config_data: dict) -> dict:
+    """Return supported runtime request overrides for the main chat model."""
+    if not isinstance(config_data, dict):
+        return {}
+    model_cfg = config_data.get("model", {})
+    if not isinstance(model_cfg, dict):
+        return {}
+    overrides = {}
+    extra_body = model_cfg.get("extra_body")
+    if isinstance(extra_body, dict) and extra_body:
+        overrides["extra_body"] = copy.deepcopy(extra_body)
+    return overrides
+
+
+def _apply_advanced_model_options(model_cfg: dict, advanced: dict | None) -> None:
+    """Apply supported advanced model options to a config block in-place."""
+    if advanced is None:
+        return
+    if not isinstance(advanced, dict):
+        raise ValueError("advanced model options must be an object")
+    if "base_url" in advanced:
+        base_url = str(advanced.get("base_url") or "").strip().rstrip("/")
+        if base_url:
+            model_cfg["base_url"] = base_url
+        else:
+            model_cfg.pop("base_url", None)
+    for field in ("timeout", "download_timeout", "max_concurrency"):
+        if field in advanced:
+            coerced = _coerce_optional_positive_int(advanced.get(field), field)
+            if coerced == "":
+                model_cfg.pop(field, None)
+            elif coerced is not None:
+                model_cfg[field] = coerced
+    if "extra_body" in advanced:
+        extra_body = advanced.get("extra_body")
+        if isinstance(extra_body, str):
+            text = extra_body.strip()
+            try:
+                extra_body = json.loads(text) if text else {}
+            except json.JSONDecodeError as exc:
+                raise ValueError("extra_body must be valid JSON") from exc
+        if extra_body in (None, ""):
+            model_cfg.pop("extra_body", None)
+        elif isinstance(extra_body, dict):
+            if extra_body:
+                model_cfg["extra_body"] = extra_body
+            else:
+                model_cfg.pop("extra_body", None)
+        else:
+            raise ValueError("extra_body must be a JSON object")
+    if advanced.get("api_key_clear"):
+        model_cfg.pop("api_key", None)
+    api_key = str(advanced.get("api_key") or "").strip()
+    if api_key:
+        model_cfg["api_key"] = api_key
+
+
+def set_hermes_default_model(model_id: str, advanced: dict | None = None) -> dict:
     """Persist the Hermes default model in config.yaml and reload runtime config."""
     selected_model = str(model_id or "").strip()
     if not selected_model:
@@ -3107,6 +3178,8 @@ def set_hermes_default_model(model_id: str) -> dict:
             elif not persisted_provider.startswith("custom:"):
                 model_cfg.pop("base_url", None)
 
+        _apply_advanced_model_options(model_cfg, advanced)
+
         config_data["model"] = model_cfg
         _save_yaml_config_file(config_path, config_data)
     # Reload outside the lock — reload_config() acquires _cfg_lock itself.
@@ -3133,6 +3206,9 @@ AUX_TASK_SLOTS: tuple[str, ...] = (
  "mcp",
  "title_generation",
  "curator",
+ "kanban_decomposer",
+ "profile_describer",
+ "triage_specifier",
 )
 
 
@@ -3169,18 +3245,46 @@ def get_auxiliary_models() -> dict:
             "provider": str(entry.get("provider") or "auto").strip(),
             "model": str(entry.get("model") or "").strip(),
             "base_url": str(entry.get("base_url") or "").strip(),
+            "timeout": entry.get("timeout", ""),
+            "download_timeout": entry.get("download_timeout", ""),
+            "max_concurrency": entry.get("max_concurrency", ""),
+            "extra_body": entry.get("extra_body") if isinstance(entry.get("extra_body"), dict) else {},
+            "api_key_set": bool(str(entry.get("api_key") or "").strip()),
         })
 
     return {
         "tasks": tasks,
-        "main": {"provider": main_provider, "model": main_model},
+        "main": {
+            "provider": main_provider,
+            "model": main_model,
+            **_public_advanced_model_options(model_cfg),
+        },
     }
 
 
-def set_auxiliary_model(task: str, provider: str, model: str) -> dict:
+def _coerce_optional_positive_int(value, field: str):
+    if value is None:
+        return None
+    if isinstance(value, str):
+        value = value.strip()
+        if value == "":
+            return ""
+    try:
+        number = int(value)
+    except (TypeError, ValueError) as exc:
+        raise ValueError(f"{field} must be a positive integer") from exc
+    if number < 1:
+        raise ValueError(f"{field} must be a positive integer")
+    return number
+
+
+def set_auxiliary_model(task: str, provider: str, model: str, advanced: dict | None = None) -> dict:
     """Persist an auxiliary model assignment in config.yaml.
 
     Special case: task='__reset__' clears all auxiliary slots.
+    ``advanced`` may update per-slot fields surfaced behind the WebUI gear menu.
+    Sensitive api_key values are write-only: get_auxiliary_models() only reports
+    whether one is set.
     """
     if task != "__reset__" and task not in AUX_TASK_SLOTS:
         raise ValueError(
@@ -3220,6 +3324,12 @@ def set_auxiliary_model(task: str, provider: str, model: str) -> dict:
                         slot_cfg["base_url"] = str(resolved_base_url).strip().rstrip("/")
                 except Exception:
                     pass
+            if advanced is not None:
+                try:
+                    _apply_advanced_model_options(slot_cfg, advanced)
+                except ValueError as exc:
+                    msg = str(exc).replace("advanced model options", "advanced auxiliary options")
+                    raise ValueError(msg) from exc
             aux_cfg[task] = slot_cfg
             config_data["auxiliary"] = aux_cfg
 
diff --git a/api/routes.py b/api/routes.py
index 8b6009498..3e6e65f00 100644
--- a/api/routes.py
+++ b/api/routes.py
@@ -8207,7 +8207,8 @@ def handle_post(handler, parsed) -> bool:
 
     if parsed.path == "/api/default-model":
         try:
-            return j(handler, set_hermes_default_model(body.get("model")))
+            advanced = body.get("advanced") if isinstance(body, dict) else None
+            return j(handler, set_hermes_default_model(body.get("model"), advanced=advanced))
         except ValueError as e:
             return bad(handler, str(e))
         except RuntimeError as e:
@@ -8219,15 +8220,16 @@ def handle_post(handler, parsed) -> bool:
         task = str(body.get("task") or "").strip()
         provider = str(body.get("provider") or "auto").strip()
         model = str(body.get("model") or "").strip()
+        advanced = body.get("advanced") if isinstance(body, dict) else None
         if scope == "auxiliary":
             from api.config import set_auxiliary_model
             try:
-                return j(handler, set_auxiliary_model(task, provider, model))
+                return j(handler, set_auxiliary_model(task, provider, model, advanced=advanced))
             except Exception as exc:
                 return bad(handler, str(exc), status=400)
         if scope == "main":
             try:
-                return j(handler, set_hermes_default_model(model))
+                return j(handler, set_hermes_default_model(model, advanced=advanced))
             except ValueError as exc:
                 return bad(handler, str(exc), status=400)
         return bad(handler, f"unknown scope: {scope}", status=400)
diff --git a/api/streaming.py b/api/streaming.py
index 4220888f9..d06c17faa 100644
--- a/api/streaming.py
+++ b/api/streaming.py
@@ -38,6 +38,7 @@ from api.config import (
     load_settings,
     parse_reasoning_effort,
     coerce_reasoning_effort_for_model,
+    _main_model_request_overrides,
 )
 from api.helpers import redact_session_data, _redact_text
 from api.compression_anchor import is_context_compression_marker, visible_messages_for_anchor
@@ -6189,6 +6190,7 @@ def _run_agent_streaming(
             _prefill_context = _load_webui_prefill_context(_cfg)
             _prefill_messages = _prefill_messages_with_webui_context(_prefill_context, _cfg)
             _prefill_messages = _normalize_prefill_messages_before_user_turn(_prefill_messages)
+            _main_request_overrides = _main_model_request_overrides(_cfg)
             put('context_status', {
                 'session_id': session_id,
                 'prefill': _public_prefill_context_status(_prefill_context),
@@ -6370,6 +6372,8 @@ def _run_agent_streaming(
                 _agent_kwargs['max_iterations'] = _max_iterations_cfg
             if 'max_tokens' in _agent_params and _max_tokens_cfg is not None:
                 _agent_kwargs['max_tokens'] = _max_tokens_cfg
+            if 'request_overrides' in _agent_params and _main_request_overrides:
+                _agent_kwargs['request_overrides'] = _main_request_overrides
             # Params added in newer hermes-agent — skip if not supported
             if 'api_mode' in _agent_params:
                 _agent_kwargs['api_mode'] = _rt.get('api_mode')
@@ -6411,6 +6415,7 @@ def _run_agent_streaming(
                     _fallback_resolved or {},
                     sorted(_toolsets) if _toolsets else [],
                     _reasoning_config or {},
+                    _main_request_overrides or {},
                     _public_prefill_context_status(_prefill_context),
                     # #1897: profile_home is part of the agent's identity because
                     # AIAgent caches `_cached_system_prompt` from `load_soul_md()`
diff --git a/static/i18n.js b/static/i18n.js
index 07e8bf62c..bcbbe61c1 100644
--- a/static/i18n.js
+++ b/static/i18n.js
@@ -609,6 +609,11 @@ const LOCALES = {
     settings_save_btn: 'Save Settings',
     settings_label_model: 'Default Model',
     settings_desc_model: 'Used for new conversations. Existing conversations keep their selected model.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Auxiliary Models',
     settings_desc_auxiliary_models: 'Side-task routing for vision, compression, title generation, etc. "Auto" uses your main chat model.',
     settings_btn_reset_aux_models: 'Reset all to auto',
@@ -625,6 +630,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Failed to save auxiliary model',
     settings_aux_saved: 'Auxiliary models updated',
     settings_aux_no_changes: 'No changes to apply',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Send Key',
     settings_label_theme: 'Theme',
     settings_label_skin: 'Skin',
@@ -2035,6 +2087,11 @@ const LOCALES = {
     settings_save_btn: 'Salva Impostazioni',
     settings_label_model: 'Modello Predefinito',
     settings_desc_model: 'Usato per le nuove conversazioni. Le conversazioni esistenti mantengono il modello selezionato.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Modelli Ausiliari',
     settings_desc_auxiliary_models: 'Routing per attività secondarie come visione, compressione, generazione titoli, ecc. "Auto" utilizza il modello chat principale.',
     settings_btn_reset_aux_models: 'Ripristina tutto ad auto',
@@ -2051,6 +2108,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Salvataggio del modello ausiliario non riuscito',
     settings_aux_saved: 'Modelli ausiliari aggiornati',
     settings_aux_no_changes: 'Nessuna modifica da applicare',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Tasto Invio',
     settings_label_theme: 'Tema',
     settings_label_skin: 'Skin',
@@ -3452,6 +3556,11 @@ const LOCALES = {
     settings_save_btn: '設定を保存',
     settings_label_model: 'デフォルトモデル',
     settings_desc_model: '新しい会話で使用されます。既存の会話は選択済みモデルを保持します。',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: '補助モデル',
     settings_desc_auxiliary_models: 'ビジョン、圧縮、タイトル生成などの補助タスクのルーティング。「自動」はメインチャットモデルを使用します。',
     settings_btn_reset_aux_models: 'すべて自動にリセット',
@@ -3468,6 +3577,53 @@ const LOCALES = {
     settings_aux_save_failed: '補助モデルの保存に失敗しました',
     settings_aux_saved: '補助モデルを更新しました',
     settings_aux_no_changes: '適用する変更はありません',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: '送信キー',
     settings_label_theme: 'テーマ',
     settings_label_skin: 'スキン',
@@ -4661,6 +4817,11 @@ const LOCALES = {
     settings_save_btn: 'Сохранить настройки',
     settings_label_model: 'Модель по умолчанию',
     settings_desc_model: 'Используется для новых бесед. Существующие беседы сохраняют выбранную модель.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Вспомогательные модели',
     settings_desc_auxiliary_models: 'Маршрутизация побочных задач: зрение, сжатие, генерация заголовков и т.д. «Авто» использует основную модель чата.',
     settings_btn_reset_aux_models: 'Сбросить всё на авто',
@@ -4677,6 +4838,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Не удалось сохранить вспомогательную модель',
     settings_aux_saved: 'Вспомогательные модели обновлены',
     settings_aux_no_changes: 'Нет изменений для применения',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Клавиша отправки',
     settings_label_theme: 'Тема',
     settings_label_language: 'Язык',
@@ -5995,6 +6203,11 @@ const LOCALES = {
     settings_save_btn: 'Guardar configuración',
     settings_label_model: 'Modelo predeterminado',
     settings_desc_model: 'Se usa para conversaciones nuevas. Las conversaciones existentes conservan su modelo seleccionado.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Modelos auxiliares',
     settings_desc_auxiliary_models: 'Enrutamiento para tareas secundarias como visión, compresión, generación de títulos, etc. «Auto» usa el modelo de chat principal.',
     settings_btn_reset_aux_models: 'Restablecer todo a auto',
@@ -6011,6 +6224,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Error al guardar el modelo auxiliar',
     settings_aux_saved: 'Modelos auxiliares actualizados',
     settings_aux_no_changes: 'Sin cambios para aplicar',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Tecla de envío',
     settings_label_theme: 'Tema',
     settings_label_skin: 'Piel',
@@ -7333,6 +7593,11 @@ const LOCALES = {
     settings_save_btn: 'Einstellungen speichern',
     settings_label_model: 'Standard-Modell',
     settings_desc_model: 'Wird für neue Chats verwendet. Bestehende Chats behalten ihr ausgewähltes Modell.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Hilfsmodelle',
     settings_desc_auxiliary_models: 'Routing für Nebenaufgaben wie Vision, Komprimierung, Titelgenerierung usw. „Auto" verwendet das Haupt-Chat-Modell.',
     settings_btn_reset_aux_models: 'Alle auf auto zurücksetzen',
@@ -7349,6 +7614,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Hilfsmodell konnte nicht gespeichert werden',
     settings_aux_saved: 'Hilfsmodelle aktualisiert',
     settings_aux_no_changes: 'Keine Änderungen anzuwenden',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'Bild-/Screenshot-Analyse',
+    settings_aux_task_compression: 'Komprimierung',
+    settings_aux_task_compression_desc: 'Kontext-Zusammenfassung',
+    settings_aux_task_web_extract: 'Web-Extraktion',
+    settings_aux_task_web_extract_desc: 'Webseiten-Zusammenfassung',
+    settings_aux_task_session_search: 'Sitzungssuche',
+    settings_aux_task_session_search_desc: 'Erinnerung an frühere Gespräche',
+    settings_aux_task_approval: 'Freigabe',
+    settings_aux_task_approval_desc: 'intelligente Befehlsfreigabe',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP-Tool-Reasoning',
+    settings_aux_task_title_generation: 'Titelgenerierung',
+    settings_aux_task_title_generation_desc: 'Sitzungstitel',
+    settings_aux_task_skills_hub: 'Skills Hub',
+    settings_aux_task_skills_hub_desc: 'Skill-Suche/-Installation',
+    settings_aux_task_curator: 'Kurator',
+    settings_aux_task_curator_desc: 'Skill-Nutzungsprüfung',
+    settings_aux_task_kanban_decomposer: 'Kanban-Zerleger',
+    settings_aux_task_kanban_decomposer_desc: 'Aufgabenzerlegung',
+    settings_aux_task_profile_describer: 'Profilbeschreiber',
+    settings_aux_task_profile_describer_desc: 'Profil-Zusammenfassungen',
+    settings_aux_task_triage_specifier: 'Triage-Spezifizierer',
+    settings_aux_task_triage_specifier_desc: 'Issue-/Aufgaben-Triage-Spezifikationen',
+    settings_aux_advanced_button_title: 'Erweiterte Optionen',
+    settings_aux_advanced_button_aria: 'Erweiterte Optionen für {task}',
+    settings_aux_advanced_title: '{task}-Optionen',
+    settings_aux_advanced_subtitle: 'Erweiterte Konfiguration für diese Hilfsaufgabe.',
+    settings_aux_advanced_save: 'Optionen speichern',
+    settings_aux_advanced_base_url: 'Basis-URL',
+    settings_aux_advanced_base_url_desc: 'Optionaler Provider-Endpunkt-Override.',
+    settings_aux_advanced_timeout: 'Timeout in Sekunden',
+    settings_aux_advanced_timeout_desc: 'Request-Timeout für diese Hilfsaufgabe. Leer nutzt den Hermes-Standard.',
+    settings_aux_advanced_download_timeout: 'Download-Timeout in Sekunden',
+    settings_aux_advanced_download_timeout_desc: 'Nur relevant für Aufgaben, die Medien/Inhalte herunterladen, z. B. Vision. Leer nutzt den Standard.',
+    settings_aux_advanced_max_concurrency: 'Maximale Parallelität',
+    settings_aux_advanced_max_concurrency_desc: 'Optionale Parallelitätsgrenze pro Aufgabe. Leer nutzt den Standard.',
+    settings_aux_advanced_extra_body: 'Extra-Body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optionales JSON-Objekt, das in den Model-Request-Body gemischt wird.',
+    settings_aux_advanced_api_key: 'API-Key-Override',
+    settings_aux_advanced_api_key_set_hint: 'API-Key ist gesetzt. Leer lassen, um ihn zu behalten, oder Löschen aktivieren.',
+    settings_aux_advanced_api_key_empty_hint: 'Leer lassen, um Provider-/Standard-Zugangsdaten zu verwenden.',
+    settings_aux_advanced_api_key_clear: 'Vorhandenen API-Key-Override löschen',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra-Body muss gültiges JSON sein',
+    settings_aux_advanced_extra_body_object_required: 'Extra-Body muss ein JSON-Objekt sein',
+    settings_aux_advanced_saved: 'Hilfsoptionen gespeichert',
+    settings_aux_advanced_save_failed: 'Hilfsoptionen konnten nicht gespeichert werden',
     settings_label_send_key: 'Sende-Taste',
     settings_label_theme: 'Theme',
     settings_label_skin: 'Skin',
@@ -8724,6 +9036,11 @@ const LOCALES = {
     settings_save_btn: '保存设置',
     settings_label_model: '默认模型',
     settings_desc_model: '用于新对话。现有对话保持各自选定的模型。',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: '辅助模型',
     settings_desc_auxiliary_models: '视觉分析、上下文压缩、标题生成等辅助任务的路由。"自动"表示使用主聊天模型。',
     settings_btn_reset_aux_models: '全部重置为自动',
@@ -8740,6 +9057,53 @@ const LOCALES = {
     settings_aux_save_failed: '辅助模型保存失败',
     settings_aux_saved: '辅助模型已更新',
     settings_aux_no_changes: '没有需要应用的更改',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: '发送快捷键',
     settings_label_theme: '主题',
     settings_label_skin: '皮肤',
@@ -10286,6 +10650,11 @@ const LOCALES = {
     settings_save_btn: '儲存設定',
     settings_label_model: '預設模型',
     settings_desc_model: '用於新對話。現有對話會保留各自選定的模型。',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: '輔助模型',
     settings_desc_auxiliary_models: '視覺分析、脈絡壓縮、標題產生等輔助任務的路由。「自動」表示使用主要聊天模型。',
     settings_btn_reset_aux_models: '全部重置為自動',
@@ -10302,8 +10671,57 @@ const LOCALES = {
     settings_aux_save_failed: '輔助模型儲存失敗',
     settings_aux_saved: '輔助模型已更新',
     settings_aux_no_changes: '沒有需要應用的變更',
+
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: '送出按鍵',
     settings_label_theme: '主題',
+
     settings_label_skin: '佈景',
     settings_label_font_size: '字型大小',
     font_size_small: '小',
@@ -11593,6 +12011,11 @@ const LOCALES = {
     settings_save_btn: 'Salvar Configurações',
     settings_label_model: 'Modelo Padrão',
     settings_desc_model: 'Usado para novas conversas. Conversas existentes mantêm o modelo selecionado.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Modelos auxiliares',
     settings_desc_auxiliary_models: 'Roteamento para tarefas secundárias como visão, compressão, geração de títulos, etc. "Auto" usa o modelo de chat principal.',
     settings_btn_reset_aux_models: 'Restaurar tudo para auto',
@@ -11609,6 +12032,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Falha ao salvar o modelo auxiliar',
     settings_aux_saved: 'Modelos auxiliares atualizados',
     settings_aux_no_changes: 'Nenhuma alteração para aplicar',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Tecla de Envio',
     settings_label_theme: 'Tema',
     settings_label_skin: 'Skin',
@@ -12911,6 +13381,11 @@ const LOCALES = {
     settings_save_btn: '설정 저장',
     settings_label_model: '기본 모델',
     settings_desc_model: '새 대화에 사용됩니다. 기존 대화는 선택된 모델을 유지합니다.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: '보조 모델',
     settings_desc_auxiliary_models: '비전, 압축, 제목 생성 등 보조 작업 라우팅. "자동"은 기본 채팅 모델을 사용합니다.',
     settings_btn_reset_aux_models: '모두 자동으로 재설정',
@@ -12927,6 +13402,53 @@ const LOCALES = {
     settings_aux_save_failed: '보조 모델 저장 실패',
     settings_aux_saved: '보조 모델 업데이트됨',
     settings_aux_no_changes: '적용할 변경 사항 없음',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: '전송 키',
     settings_label_theme: '테마',
     settings_label_skin: '스킨',
@@ -14246,6 +14768,11 @@ const LOCALES = {
     settings_save_btn: 'Enregistrer les paramètres',
     settings_label_model: 'Modèle par défaut',
     settings_desc_model: 'Utilisé pour les nouvelles conversations. Les conversations existantes conservent leur modèle sélectionné.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_auxiliary_models: 'Modèles auxiliaires',
     settings_desc_auxiliary_models: 'Routage des tâches secondaires : vision, compression, génération de titres, etc. « Auto » utilise le modèle de chat principal.',
     settings_btn_reset_aux_models: 'Tout réinitialiser à auto',
@@ -14262,6 +14789,53 @@ const LOCALES = {
     settings_aux_save_failed: 'Échec de la sauvegarde du modèle auxiliaire',
     settings_aux_saved: 'Modèles auxiliaires mis à jour',
     settings_aux_no_changes: 'Aucune modification à appliquer',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Envoyer la clé',
     settings_label_theme: 'Thème',
     settings_label_skin: 'Peau',
@@ -15690,6 +16264,53 @@ const LOCALES = {
       settings_aux_model_custom: 'Özel model…',
       settings_aux_model_custom_prompt: 'Model kimliğini girin:',
       settings_aux_no_changes: 'Uygulanacak değişiklik yok',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
       settings_aux_saved: 'Yardımcı modeller güncellendi',
       settings_aux_save_failed: 'Yardımcı model kaydedilemedi',
       settings_aux_reset_confirm_title: 'Yardımcı modeller sıfırlansın mı?',
@@ -15698,6 +16319,11 @@ const LOCALES = {
       settings_btn_apply_aux_models: 'Değişiklikleri uygula',
       settings_btn_reset_aux_models: 'Tümünü otomatiğe sıfırla',
     settings_desc_model: 'Yeni konuşmalar için kullanılır. Mevcut konuşmalar seçilen modellerini korur.',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
     settings_label_send_key: 'Anahtar Gönder',
     settings_label_theme: 'Tema',
     settings_label_skin: 'Deri',
@@ -17128,6 +17754,58 @@ const LOCALES = {
     settings_aux_save_failed: 'Nie udało się zapisać modelu pomocniczego',
     settings_aux_saved: 'Zaktualizowano modele pomocnicze',
     settings_aux_no_changes: 'Brak zmian do zastosowania',
+    settings_aux_task_vision: 'Vision',
+    settings_aux_task_vision_desc: 'image/screenshot analysis',
+    settings_aux_task_compression: 'Compression',
+    settings_aux_task_compression_desc: 'context summarization',
+    settings_aux_task_web_extract: 'Web extract',
+    settings_aux_task_web_extract_desc: 'web page summarization',
+    settings_aux_task_session_search: 'Session search',
+    settings_aux_task_session_search_desc: 'past-conversation recall',
+    settings_aux_task_approval: 'Approval',
+    settings_aux_task_approval_desc: 'smart command approval',
+    settings_aux_task_mcp: 'MCP',
+    settings_aux_task_mcp_desc: 'MCP tool reasoning',
+    settings_aux_task_title_generation: 'Title generation',
+    settings_aux_task_title_generation_desc: 'session titles',
+    settings_aux_task_skills_hub: 'Skills hub',
+    settings_aux_task_skills_hub_desc: 'skills search/install',
+    settings_aux_task_curator: 'Curator',
+    settings_aux_task_curator_desc: 'skill-usage review pass',
+    settings_aux_task_kanban_decomposer: 'Kanban decomposer',
+    settings_aux_task_kanban_decomposer_desc: 'task decomposition',
+    settings_aux_task_profile_describer: 'Profile describer',
+    settings_aux_task_profile_describer_desc: 'profile summaries',
+    settings_aux_task_triage_specifier: 'Triage specifier',
+    settings_aux_task_triage_specifier_desc: 'issue/task triage specs',
+    settings_main_advanced_button_aria: 'Advanced options for main model',
+    settings_main_advanced_title: 'Main model options',
+    settings_main_advanced_subtitle: 'Advanced config for the default chat model.',
+    settings_main_advanced_saved: 'Main model options saved',
+    settings_main_advanced_save_failed: 'Failed to save main model options',
+    settings_aux_advanced_button_title: 'Advanced options',
+    settings_aux_advanced_button_aria: 'Advanced options for {task}',
+    settings_aux_advanced_title: '{task} options',
+    settings_aux_advanced_subtitle: 'Advanced config for auxiliary.',
+    settings_aux_advanced_save: 'Save options',
+    settings_aux_advanced_base_url: 'Base URL',
+    settings_aux_advanced_base_url_desc: 'Optional provider endpoint override.',
+    settings_aux_advanced_timeout: 'Timeout seconds',
+    settings_aux_advanced_timeout_desc: 'Request timeout for this auxiliary task. Blank uses Hermes default.',
+    settings_aux_advanced_download_timeout: 'Download timeout seconds',
+    settings_aux_advanced_download_timeout_desc: 'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.',
+    settings_aux_advanced_max_concurrency: 'Max concurrency',
+    settings_aux_advanced_max_concurrency_desc: 'Optional per-task concurrency limit. Blank uses default.',
+    settings_aux_advanced_extra_body: 'Extra body JSON',
+    settings_aux_advanced_extra_body_desc: 'Optional JSON object merged into the model request body.',
+    settings_aux_advanced_api_key: 'API key override',
+    settings_aux_advanced_api_key_set_hint: 'API key is set. Leave blank to keep it, or use clear to remove it.',
+    settings_aux_advanced_api_key_empty_hint: 'Leave blank to use provider/default credentials.',
+    settings_aux_advanced_api_key_clear: 'Clear existing API key override',
+    settings_aux_advanced_extra_body_invalid_json: 'Extra body must be valid JSON',
+    settings_aux_advanced_extra_body_object_required: 'Extra body must be a JSON object',
+    settings_aux_advanced_saved: 'Auxiliary options saved',
+    settings_aux_advanced_save_failed: 'Failed to save auxiliary options',
     settings_label_send_key: 'Klawisz wysyłania',
     settings_label_theme: 'Motyw',
     settings_label_skin: 'Skórka',
diff --git a/static/index.html b/static/index.html
index 4bca04e28..d3501dd50 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1056,7 +1056,10 @@
             </div>
             <div class="settings-field">
               <label for="settingsModel" data-i18n="settings_label_model">Default Model</label>
-              <select id="settingsModel" style="width:100%;padding:8px;background:var(--code-bg);color:var(--text);border:1px solid var(--border2);border-radius:6px"></select>
+              <div class="model-advanced-row">
+                <select id="settingsModel" style="width:100%;padding:8px;background:var(--code-bg);color:var(--text);border:1px solid var(--border2);border-radius:6px"></select>
+                <button type="button" id="mainAdvancedBtn" class="model-advanced-btn" title="Advanced options" aria-label="Advanced options for main model"><svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09A1.65 1.65 0 0 0 9 19.4a1.65 1.65 0 0 0-1.82.33l-.06.06a2 2 0 0 1-2.83-2.83l.06-.06A1.65 1.65 0 0 0 4.68 15a1.65 1.65 0 0 0-1.51-1H3a2 2 0 0 1 0-4h.09A1.65 1.65 0 0 0 4.6 9a1.65 1.65 0 0 0-.33-1.82l-.06-.06a2 2 0 0 1 2.83-2.83l.06.06A1.65 1.65 0 0 0 9 4.68a1.65 1.65 0 0 0 1-1.51V3a2 2 0 0 1 4 0v.09a1.65 1.65 0 0 0 1 1.51 1.65 1.65 0 0 0 1.82-.33l.06-.06a2 2 0 0 1 2.83 2.83l-.06.06A1.65 1.65 0 0 0 19.4 9a1.65 1.65 0 0 0 1.51 1H21a2 2 0 0 1 0 4h-.09a1.65 1.65 0 0 0-1.51 1z"/></svg></button>
+              </div>
               <div style="font-size:11px;color:var(--muted);margin-top:4px" data-i18n="settings_desc_model">Used for new conversations. Existing conversations keep their selected model.</div>
             </div>
             <div class="settings-field">
diff --git a/static/panels.js b/static/panels.js
index d4d6010f6..bcfdf0d51 100644
--- a/static/panels.js
+++ b/static/panels.js
@@ -6706,6 +6706,7 @@ async function loadSettingsPanel(){
       modelSel.addEventListener('change',_markSettingsDirty,{once:false});
     }
     // Auxiliary models — load task assignments and provider/model options
+    _bindMainAdvancedOptionsButton();
     _loadAuxiliaryModels();
     // Send key preference
     const sendKeySel=$('settingsSendKey');
@@ -8009,19 +8010,23 @@ async function checkUpdatesNow(){
 // Canonical auxiliary task slots with display names.
 // Keep in sync with hermes_cli/main.py _AUX_TASKS and hermes_cli/web_server.py _AUX_TASK_SLOTS.
 const _AUX_TASK_SLOTS=[
- {key:'vision',name:'Vision',desc:'image/screenshot analysis'},
- {key:'compression',name:'Compression',desc:'context summarization'},
- {key:'web_extract',name:'Web extract',desc:'web page summarization'},
- {key:'session_search',name:'Session search',desc:'past-conversation recall'},
- {key:'approval',name:'Approval',desc:'smart command approval'},
- {key:'mcp',name:'MCP',desc:'MCP tool reasoning'},
- {key:'title_generation',name:'Title generation',desc:'session titles'},
- {key:'skills_hub',name:'Skills hub',desc:'skills search/install'},
- {key:'curator',name:'Curator',desc:'skill-usage review pass'},
+ {key:'vision',nameKey:'settings_aux_task_vision',descKey:'settings_aux_task_vision_desc'},
+ {key:'compression',nameKey:'settings_aux_task_compression',descKey:'settings_aux_task_compression_desc'},
+ {key:'web_extract',nameKey:'settings_aux_task_web_extract',descKey:'settings_aux_task_web_extract_desc'},
+ {key:'session_search',nameKey:'settings_aux_task_session_search',descKey:'settings_aux_task_session_search_desc'},
+ {key:'approval',nameKey:'settings_aux_task_approval',descKey:'settings_aux_task_approval_desc'},
+ {key:'mcp',nameKey:'settings_aux_task_mcp',descKey:'settings_aux_task_mcp_desc'},
+ {key:'title_generation',nameKey:'settings_aux_task_title_generation',descKey:'settings_aux_task_title_generation_desc'},
+ {key:'skills_hub',nameKey:'settings_aux_task_skills_hub',descKey:'settings_aux_task_skills_hub_desc'},
+ {key:'curator',nameKey:'settings_aux_task_curator',descKey:'settings_aux_task_curator_desc'},
+ {key:'kanban_decomposer',nameKey:'settings_aux_task_kanban_decomposer',descKey:'settings_aux_task_kanban_decomposer_desc'},
+ {key:'profile_describer',nameKey:'settings_aux_task_profile_describer',descKey:'settings_aux_task_profile_describer_desc'},
+ {key:'triage_specifier',nameKey:'settings_aux_task_triage_specifier',descKey:'settings_aux_task_triage_specifier_desc'},
 ];
 
-let _auxProviders=[];       // cached provider list from /api/model/options
+let _auxProviders=[];       // cached provider list from /api/models
 let _auxOriginalConfig=null; // snapshot of initial config for dirty detection
+let _mainAdvancedConfig=null; // current advanced config for the default chat model
 
 function _auxSelectStyle(){
  return 'width:100%;padding:6px 8px;background:var(--code-bg);color:var(--text);border:1px solid var(--border2);border-radius:6px;font-size:12px;box-sizing:border-box';
@@ -8109,6 +8114,154 @@ function _markAuxDirty(){
  _markSettingsDirty();
 }
 
+function _auxAdvancedValue(cfg,key){
+ const v=cfg&&Object.prototype.hasOwnProperty.call(cfg,key)?cfg[key]:'';
+ return v===null||v===undefined?'':String(v);
+}
+
+function _ensureAuxAdvancedModal(){
+ let overlay=$('auxAdvancedOverlay');
+ if(overlay) return overlay;
+ overlay=document.createElement('div');
+ overlay.id='auxAdvancedOverlay';
+ overlay.style.cssText='position:fixed;inset:0;z-index:9999;background:rgba(5,7,15,.68);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:20px';
+ const neutralBtn='font-size:12px;padding:7px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;font-weight:600';
+ const primaryBtn='font-size:12px;padding:7px 12px;border-radius:8px;border:1px solid var(--accent);background:var(--accent);color:#1a1a1a;cursor:pointer;font-weight:700';
+ overlay.innerHTML=`<div role="dialog" aria-modal="true" aria-labelledby="auxAdvancedTitle" style="width:min(620px,calc(100vw - 32px));max-height:calc(100vh - 48px);overflow:auto;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:14px;box-shadow:0 18px 60px rgba(0,0,0,.45);padding:16px">
+  <style>#auxAdvancedOverlay input:-webkit-autofill,#auxAdvancedOverlay textarea:-webkit-autofill{box-shadow:0 0 0 1000px var(--code-bg) inset!important;-webkit-box-shadow:0 0 0 1000px var(--code-bg) inset!important;-webkit-text-fill-color:var(--text)!important;caret-color:var(--text)!important}</style>
+  <div style="display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px">
+   <div><div id="auxAdvancedTitle" style="font-weight:700;font-size:16px"></div><div id="auxAdvancedSubtitle" style="font-size:11px;color:var(--muted);margin-top:2px"></div></div>
+   <button type="button" id="auxAdvancedClose" aria-label="${esc(t('terminal_close')||'Close')}" style="width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;border:1px solid var(--border);background:var(--input-bg);color:var(--text);cursor:pointer;font-size:18px;line-height:1">×</button>
+  </div>
+  <div id="auxAdvancedBody" style="display:grid;gap:10px"></div>
+  <div style="display:flex;justify-content:flex-end;gap:8px;margin-top:14px">
+   <button type="button" id="auxAdvancedCancel" style="${neutralBtn}">${esc(t('cancel')||'Cancel')}</button>
+   <button type="button" id="auxAdvancedSave" style="${primaryBtn}">${esc(t('settings_aux_advanced_save')||'Save options')}</button>
+  </div>
+ </div>`;
+ document.body.appendChild(overlay);
+ const close=()=>{overlay.style.display='none';overlay.dataset.task='';};
+ $('auxAdvancedClose')?.addEventListener('click',close);
+ $('auxAdvancedCancel')?.addEventListener('click',close);
+ overlay.addEventListener('click',ev=>{if(ev.target===overlay) close();});
+ return overlay;
+}
+
+function _auxAdvancedInputHtml(id,label,value,desc,type='text',extraAttrs='',extraStyle=''){
+ const fieldName=id==='auxAdvancedApiKey'?'aux-manual-override-value':('aux-field-'+id.replace(/^auxAdvanced/,'').toLowerCase());
+ const autocompleteAttr=/\bautocomplete=/.test(extraAttrs)?'':'autocomplete="off"';
+ const inputAttrs=`id="${id}" name="${fieldName}" type="${type}" value="${esc(value)}" ${autocompleteAttr} autocapitalize="off" autocorrect="off" spellcheck="false" data-lpignore="true" data-1p-ignore="true" ${extraAttrs}`;
+ return `<label style="display:grid;gap:4px;font-size:12px;color:var(--text)"><span style="font-weight:600">${esc(label)}</span><input ${inputAttrs} style="width:100%;box-sizing:border-box;padding:7px 8px;background:var(--code-bg);color:var(--text);border:1px solid var(--border2);border-radius:6px;font-size:12px${extraStyle}"><span style="font-size:10px;color:var(--muted);line-height:1.35">${esc(desc)}</span></label>`;
+}
+
+function _openAuxAdvancedOptions(taskKey,cfg){
+ const isMain=taskKey==='__main__';
+ const slot=isMain?{key:taskKey,nameKey:'settings_label_model',descKey:'settings_desc_model'}:(_AUX_TASK_SLOTS.find(s=>s.key===taskKey)||{key:taskKey,nameKey:'',descKey:''});
+ const overlay=_ensureAuxAdvancedModal();
+ overlay.dataset.task=taskKey;
+ const title=$('auxAdvancedTitle'),sub=$('auxAdvancedSubtitle'),body=$('auxAdvancedBody');
+ const slotName=t(slot.nameKey)||slot.key;
+ if(title) title.textContent=isMain?(t('settings_main_advanced_title')||'Main model options'):((t('settings_aux_advanced_title')||'{task} options').replace('{task}',slotName));
+ if(sub) sub.textContent=isMain?(t('settings_main_advanced_subtitle')||'Advanced config for the default chat model.'):(t('settings_aux_advanced_subtitle')||'Advanced config for auxiliary.');
+ const extraBody=cfg&&cfg.extra_body&&typeof cfg.extra_body==='object'&&Object.keys(cfg.extra_body).length?JSON.stringify(cfg.extra_body,null,2):'';
+ const apiKeyHint=cfg&&cfg.api_key_set?(t('settings_aux_advanced_api_key_set_hint')||'API key is set. Leave blank to keep it, or use clear to remove it.'):(t('settings_aux_advanced_api_key_empty_hint')||'Leave blank to use provider/default credentials.');
+ if(body){
+  const timingFields=isMain?'':(
+   _auxAdvancedInputHtml('auxAdvancedTimeout',t('settings_aux_advanced_timeout')||'Timeout seconds',_auxAdvancedValue(cfg,'timeout'),t('settings_aux_advanced_timeout_desc')||'Request timeout for this auxiliary task. Blank uses Hermes default.','number','inputmode="numeric" min="1" step="1"')+
+   _auxAdvancedInputHtml('auxAdvancedDownloadTimeout',t('settings_aux_advanced_download_timeout')||'Download timeout seconds',_auxAdvancedValue(cfg,'download_timeout'),t('settings_aux_advanced_download_timeout_desc')||'Only relevant for tasks that download media/content, e.g. vision. Blank uses default.','number','inputmode="numeric" min="1" step="1"')+
+   _auxAdvancedInputHtml('auxAdvancedMaxConcurrency',t('settings_aux_advanced_max_concurrency')||'Max concurrency',_auxAdvancedValue(cfg,'max_concurrency'),t('settings_aux_advanced_max_concurrency_desc')||'Optional per-task concurrency limit. Blank uses default.','number','inputmode="numeric" min="1" step="1"'));
+  body.innerHTML=
+   _auxAdvancedInputHtml('auxAdvancedBaseUrl',t('settings_aux_advanced_base_url')||'Base URL',_auxAdvancedValue(cfg,'base_url'),t('settings_aux_advanced_base_url_desc')||'Optional provider endpoint override.','text','inputmode="url"')+
+   timingFields+
+   `<label style="display:grid;gap:4px;font-size:12px;color:var(--text)"><span style="font-weight:600">${esc(t('settings_aux_advanced_extra_body')||'Extra body JSON')}</span><textarea id="auxAdvancedExtraBody" rows="6" style="width:100%;box-sizing:border-box;padding:7px 8px;background:var(--code-bg);color:var(--text);border:1px solid var(--border2);border-radius:6px;font-size:12px;font-family:var(--mono,monospace)">${esc(extraBody)}</textarea><span style="font-size:10px;color:var(--muted);line-height:1.35">${esc(t('settings_aux_advanced_extra_body_desc')||'Optional JSON object merged into the model request body.')}</span></label>`+
+   _auxAdvancedInputHtml('auxAdvancedApiKey',t('settings_aux_advanced_api_key')||'API key override','',apiKeyHint,'text','autocomplete="one-time-code" inputmode="text" readonly onfocus="this.removeAttribute(&quot;readonly&quot;)"',';-webkit-text-security:disc')+
+   `<label style="display:${cfg&&cfg.api_key_set?'flex':'none'};align-items:center;gap:8px;font-size:12px;color:var(--text)"><input id="auxAdvancedApiKeyClear" type="checkbox" style="width:15px;height:15px;accent-color:var(--accent)"><span>${esc(t('settings_aux_advanced_api_key_clear')||'Clear existing API key override')}</span></label>`;
+ }
+ const save=$('auxAdvancedSave');
+ if(save){
+  save.onclick=async()=>{
+   let extra={};
+   const extraText=($('auxAdvancedExtraBody')?.value||'').trim();
+   if(extraText){
+    try{extra=JSON.parse(extraText);}catch(e){if(typeof showToast==='function') showToast(t('settings_aux_advanced_extra_body_invalid_json')||'Extra body must be valid JSON');return;}
+    if(!extra||Array.isArray(extra)||typeof extra!=='object'){if(typeof showToast==='function') showToast(t('settings_aux_advanced_extra_body_object_required')||'Extra body must be a JSON object');return;}
+   }
+   const provSel=isMain?null:$('aux-prov-'+taskKey),modelSel=isMain?$('settingsModel'):$('aux-model-'+taskKey);
+   const provider=isMain?((cfg&&cfg.provider)||''):(provSel?provSel.value:((cfg&&cfg.provider)||'auto'));
+   const model=modelSel&&modelSel.value!=='__custom__'?(modelSel.value||''):((cfg&&cfg.model)||'');
+   const advanced={
+    base_url:$('auxAdvancedBaseUrl')?.value||'',
+    extra_body:extra,
+    api_key:$('auxAdvancedApiKey')?.value||'',
+    api_key_clear:!!($('auxAdvancedApiKeyClear')&&$('auxAdvancedApiKeyClear').checked),
+   };
+   if(!isMain){
+    advanced.timeout=$('auxAdvancedTimeout')?.value||'';
+    advanced.download_timeout=$('auxAdvancedDownloadTimeout')?.value||'';
+    advanced.max_concurrency=$('auxAdvancedMaxConcurrency')?.value||'';
+   }
+   try{
+    await api('/api/model/set',{method:'POST',body:JSON.stringify({scope:isMain?'main':'auxiliary',task:isMain?'':taskKey,provider,model,advanced})});
+    if(typeof showToast==='function') showToast(isMain?(t('settings_main_advanced_saved')||'Main model options saved'):(t('settings_aux_advanced_saved')||'Auxiliary options saved'));
+    overlay.style.display='none';
+    _loadAuxiliaryModels();
+   }catch(e){
+    if(typeof showToast==='function') showToast(isMain?(t('settings_main_advanced_save_failed')||'Failed to save main model options'):(t('settings_aux_advanced_save_failed')||'Failed to save auxiliary options'));
+   }
+  };
+ }
+ overlay.style.display='flex';
+ setTimeout(()=>$('auxAdvancedBaseUrl')?.focus(),0);
+}
+
+function _bindMainAdvancedOptionsButton(){
+ const modelSel=$('settingsModel');
+ let btn=$('mainAdvancedBtn');
+ if(modelSel){
+  const parent=modelSel.parentElement;
+  let row=parent&&parent.classList&&parent.classList.contains('model-advanced-row')?parent:null;
+  if(!row){
+   row=document.createElement('div');
+   row.className='model-advanced-row';
+   parent.insertBefore(row,modelSel);
+   row.appendChild(modelSel);
+  }
+  if(!btn){
+   btn=document.createElement('button');
+   btn.type='button';
+   btn.id='mainAdvancedBtn';
+  }
+  if(btn.parentElement!==row) row.appendChild(btn);
+  row.style.cssText='display:grid;grid-template-columns:minmax(0,1fr) 34px;gap:8px;align-items:center';
+  modelSel.style.width='100%';
+  modelSel.style.minWidth='0';
+  modelSel.style.boxSizing='border-box';
+ }
+ if(!btn) return;
+ btn.classList.add('model-advanced-btn');
+ if(!btn.querySelector('svg')&&typeof li==='function') btn.innerHTML=li('settings',15);
+ btn.style.position='';
+ btn.style.right='';
+ btn.style.top='';
+ btn.style.transform='';
+ btn.style.width='32px';
+ btn.style.height='32px';
+ btn.style.display='flex';
+ btn.style.alignItems='center';
+ btn.style.justifyContent='center';
+ btn.style.flex='0 0 32px';
+ btn.style.boxSizing='border-box';
+ const title=t('settings_aux_advanced_button_title')||'Advanced options';
+ btn.title=title;
+ btn.setAttribute('aria-label',t('settings_main_advanced_button_aria')||'Advanced options for main model');
+ btn.disabled=_mainAdvancedConfig===null;
+ btn.style.opacity='';
+ btn.style.cursor='';
+ if(btn._bound) return;
+ btn._bound=true;
+ btn.addEventListener('click',()=>{if(_mainAdvancedConfig!==null)_openAuxAdvancedOptions('__main__',_mainAdvancedConfig||{});});
+}
+
 async function _loadAuxiliaryModels(){
  const container=$('auxModelsContainer');
  if(!container) return;
@@ -8128,6 +8281,12 @@ async function _loadAuxiliaryModels(){
  name:g.provider,
  models:g.models.map(m=>m.id),
  }));
+ if(auxData&&Object.prototype.hasOwnProperty.call(auxData,'main')){
+ _mainAdvancedConfig=auxData.main||{};
+ }else{
+ _mainAdvancedConfig=null;
+ }
+ _bindMainAdvancedOptionsButton();
  const tasks=(auxData&&auxData.tasks)||[];
   // Build a quick lookup: taskKey → {provider, model}
   const taskMap={};
@@ -8138,12 +8297,12 @@ async function _loadAuxiliaryModels(){
   for(const slot of _AUX_TASK_SLOTS){
    const cfg=taskMap[slot.key]||{provider:'auto',model:''};
    const row=document.createElement('div');
-   row.style.cssText='display:grid;grid-template-columns:120px 1fr 1fr;gap:8px;align-items:center;margin-bottom:8px';
+   row.style.cssText='display:grid;grid-template-columns:120px 1fr 1fr 34px;gap:8px;align-items:center;margin-bottom:8px';
 
    // Task name + description
    const label=document.createElement('div');
    label.style.cssText='font-size:12px;font-weight:500;color:var(--text);line-height:1.3';
-   label.innerHTML=esc(slot.name)+'<div style="font-size:10px;color:var(--muted);font-weight:400">'+esc(slot.desc)+'</div>';
+   label.innerHTML=esc(t(slot.nameKey)||slot.key)+'<div style="font-size:10px;color:var(--muted);font-weight:400">'+esc(t(slot.descKey)||'')+'</div>';
    row.appendChild(label);
 
    // Provider select
@@ -8162,6 +8321,17 @@ async function _loadAuxiliaryModels(){
    modelSel.addEventListener('change',()=>_onAuxModelChange(slot.key));
    row.appendChild(modelSel);
 
+   const advancedBtn=document.createElement('button');
+   advancedBtn.type='button';
+   advancedBtn.className='aux-advanced-btn model-advanced-btn';
+   const advTitle=t('settings_aux_advanced_button_title')||'Advanced options';
+   const slotName=t(slot.nameKey)||slot.key;
+   advancedBtn.title=advTitle;
+   advancedBtn.setAttribute('aria-label',(t('settings_aux_advanced_button_aria')||'Advanced options for {task}').replace('{task}',slotName));
+   advancedBtn.innerHTML=typeof li==='function'?li('settings',15):'⚙';
+   advancedBtn.addEventListener('click',()=>_openAuxAdvancedOptions(slot.key,cfg));
+   row.appendChild(advancedBtn);
+
    container.appendChild(row);
   }
   // Hide apply button (no changes yet)
@@ -8211,7 +8381,7 @@ async function _applyAuxModels(){
     saved++;
    }catch(e){
     console.warn('[settings] failed to save aux task',slot.key,e);
-    if(typeof showToast==='function') showToast(t('settings_aux_save_failed')||'Failed to save auxiliary model for '+slot.name);
+    if(typeof showToast==='function') showToast(t('settings_aux_save_failed')||'Failed to save auxiliary model');
     return;
    }
   }
diff --git a/static/style.css b/static/style.css
index f22d32f95..69e86c5b0 100644
--- a/static/style.css
+++ b/static/style.css
@@ -4055,6 +4055,49 @@ main.main > #mainPlugin{display:none;}
 #mainSettings .settings-field > div[style*="color:var(--muted)"],
 #mainSettings .settings-field > div[style*="color: var(--muted)"]{font-size:12px;color:var(--muted);line-height:1.5;}
 
+.model-advanced-row{
+  display:grid;
+  grid-template-columns:minmax(0,1fr) 34px;
+  gap:8px;
+  align-items:center;
+}
+.model-advanced-row #settingsModel{
+  width:100%!important;
+  min-width:0;
+  box-sizing:border-box;
+}
+.model-advanced-btn{
+  width:32px;
+  height:32px;
+  display:flex;
+  align-items:center;
+  justify-content:center;
+  border-radius:8px;
+  border:1px solid var(--border);
+  background:var(--input-bg);
+  color:var(--muted);
+  cursor:pointer;
+  line-height:1;
+  padding:0;
+  flex:0 0 32px;
+  box-sizing:border-box;
+}
+.model-advanced-btn svg{display:block;flex-shrink:0;}
+.model-advanced-btn:hover:not(:disabled),
+.model-advanced-btn:focus-visible:not(:disabled){
+  color:var(--accent);
+  border-color:var(--accent);
+  background:var(--accent-bg);
+}
+.model-advanced-btn:focus-visible{
+  outline:2px solid var(--focus-ring);
+  outline-offset:2px;
+}
+.model-advanced-btn:disabled{
+  opacity:.7;
+  cursor:not-allowed;
+}
+
 /* Sidebar tab visibility — hide nav-tab and matching rail-btn when toggled off by user */
 .nav-tab-hidden{display:none!important;}
 
diff --git a/tests/test_auxiliary_models_settings.py b/tests/test_auxiliary_models_settings.py
index 5ec6684e0..25fd253eb 100644
--- a/tests/test_auxiliary_models_settings.py
+++ b/tests/test_auxiliary_models_settings.py
@@ -10,6 +10,7 @@ ROOT = Path(__file__).parent.parent
 PANELS_JS = (ROOT / "static" / "panels.js").read_text(encoding="utf-8")
 INDEX_HTML = (ROOT / "static" / "index.html").read_text(encoding="utf-8")
 I18N_JS = (ROOT / "static" / "i18n.js").read_text(encoding="utf-8")
+STREAMING_PY = (ROOT / "api" / "streaming.py").read_text(encoding="utf-8")
 
 
 class TestAuxiliaryModelsHTML:
@@ -62,17 +63,107 @@ class TestAuxiliaryModelsJS:
         )
 
     def test_aux_task_slots_defined(self):
-        """_AUX_TASK_SLOTS must list the 9 canonical task slots."""
+        """_AUX_TASK_SLOTS must list the 12 canonical task slots."""
         assert "_AUX_TASK_SLOTS" in PANELS_JS, (
             "Missing _AUX_TASK_SLOTS constant in panels.js"
         )
-        # Verify all 9 tasks are present
+        # Verify all 12 tasks are present
         for key in ("vision", "compression", "web_extract", "session_search",
-                     "approval", "mcp", "title_generation", "skills_hub", "curator"):
+                     "approval", "mcp", "title_generation", "skills_hub", "curator",
+                     "kanban_decomposer", "profile_describer", "triage_specifier"):
             assert f"key:'{key}'" in PANELS_JS, (
                 f"Missing auxiliary task slot '{key}' in _AUX_TASK_SLOTS"
             )
 
+    def test_advanced_options_button_and_modal_wiring(self):
+        """Each auxiliary row and the main model should expose gear-driven advanced config editing."""
+        for marker in (
+            "aux-advanced-btn",
+            "model-advanced-row",
+            "model-advanced-btn",
+            "mainAdvancedBtn",
+            "_bindMainAdvancedOptionsButton",
+            "document.createElement('button')",
+            "row.appendChild(btn)",
+            "_openAuxAdvancedOptions",
+            "_mainAdvancedConfig=null",
+            "btn.disabled=_mainAdvancedConfig===null",
+            "if(_mainAdvancedConfig!==null)",
+            "Object.prototype.hasOwnProperty.call(auxData,'main')",
+            "_mainAdvancedConfig=null;",
+            "auxAdvancedOverlay",
+            "auxAdvancedBaseUrl",
+            "auxAdvancedTimeout",
+            "auxAdvancedDownloadTimeout",
+            "auxAdvancedMaxConcurrency",
+            "auxAdvancedExtraBody",
+            "auxAdvancedApiKey",
+            "api_key_clear",
+            "Object.keys(cfg.extra_body).length",
+        ):
+            assert marker in PANELS_JS
+
+    def test_main_advanced_modal_hides_unsupported_timing_fields_but_keeps_request_body(self):
+        """Main-model modal should not advertise timing knobs that the chat agent cannot apply."""
+        open_idx = PANELS_JS.find("function _openAuxAdvancedOptions")
+        assert open_idx >= 0
+        modal_body = PANELS_JS[open_idx:open_idx + 3200]
+        assert "const timingFields=isMain?'':(" in modal_body
+        assert "auxAdvancedExtraBody" in modal_body
+        assert "auxAdvancedBaseUrl" in modal_body
+
+    def test_main_advanced_save_omits_unsupported_timing_keys(self):
+        """Saving main-model options must not send blank timing keys that backend treats as clears."""
+        save_idx = PANELS_JS.find("const advanced={")
+        assert save_idx >= 0
+        save_body = PANELS_JS[save_idx:save_idx + 900]
+        object_literal = save_body[:save_body.find("};") + 2]
+        assert "timeout:" not in object_literal
+        assert "download_timeout:" not in object_literal
+        assert "max_concurrency:" not in object_literal
+        assert "if(!isMain){" in save_body
+        assert "advanced.timeout=$('auxAdvancedTimeout')?.value||''" in save_body
+        assert "advanced.download_timeout=$('auxAdvancedDownloadTimeout')?.value||''" in save_body
+        assert "advanced.max_concurrency=$('auxAdvancedMaxConcurrency')?.value||''" in save_body
+
+    def test_main_extra_body_flows_to_agent_request_overrides(self):
+        """Persisted main extra_body must be passed to AIAgent, not only shown in Settings."""
+        assert "_main_model_request_overrides" in STREAMING_PY
+        assert "'request_overrides' in _agent_params" in STREAMING_PY
+        assert "_agent_kwargs['request_overrides'] = _main_request_overrides" in STREAMING_PY
+        assert "_main_request_overrides or {}" in STREAMING_PY
+
+    def test_advanced_modal_uses_defined_theme_tokens_and_inline_button_styles(self):
+        """The modal is appended outside #mainSettings, so scoped button CSS must not be required."""
+        modal_idx = PANELS_JS.find("function _ensureAuxAdvancedModal")
+        assert modal_idx >= 0
+        modal_body = PANELS_JS[modal_idx:modal_idx + 2400]
+        assert "var(--panel)" not in modal_body, "--panel is not a defined WebUI theme token"
+        assert "class=\"settings-btn\"" not in modal_body, "settings-btn is scoped under #mainSettings"
+        assert "background:var(--surface)" in modal_body
+        assert "background:var(--input-bg)" in modal_body
+        assert ":-webkit-autofill" in PANELS_JS
+        assert "settings_aux_advanced_title" in PANELS_JS
+        assert "settings_aux_advanced_button_aria" in PANELS_JS
+
+    def test_advanced_modal_inputs_disable_browser_autofill(self):
+        """Advanced modal fields must not be mistaken for browser login/password fields."""
+        input_helper_idx = PANELS_JS.find("function _auxAdvancedInputHtml")
+        assert input_helper_idx >= 0
+        input_helper = PANELS_JS[input_helper_idx:input_helper_idx + 1200]
+        assert 'autocomplete="off"' in input_helper
+        assert 'data-lpignore="true"' in input_helper
+        assert 'data-1p-ignore="true"' in input_helper
+        assert "aux-manual-override-value" in input_helper
+        assert "aux-${id}" not in input_helper
+        assert "autocompleteAttr" in input_helper
+        api_key_idx = PANELS_JS.find("_auxAdvancedInputHtml('auxAdvancedApiKey'")
+        assert api_key_idx >= 0
+        api_key_call = PANELS_JS[api_key_idx:api_key_idx + 450]
+        assert "'password'" not in api_key_call
+        assert 'autocomplete="one-time-code"' in api_key_call
+        assert "-webkit-text-security:disc" in api_key_call
+
     def test_calls_model_auxiliary_api(self):
         """_loadAuxiliaryModels must call /api/model/auxiliary."""
         assert "/api/model/auxiliary" in PANELS_JS, (
@@ -149,6 +240,58 @@ class TestAuxiliaryModelsI18n:
         "settings_aux_save_failed",
         "settings_aux_saved",
         "settings_aux_no_changes",
+        "settings_aux_advanced_button_title",
+        "settings_aux_advanced_button_aria",
+        "settings_aux_advanced_title",
+        "settings_aux_advanced_subtitle",
+        "settings_aux_advanced_save",
+        "settings_aux_advanced_base_url",
+        "settings_aux_advanced_base_url_desc",
+        "settings_aux_advanced_timeout",
+        "settings_aux_advanced_timeout_desc",
+        "settings_aux_advanced_download_timeout",
+        "settings_aux_advanced_download_timeout_desc",
+        "settings_aux_advanced_max_concurrency",
+        "settings_aux_advanced_max_concurrency_desc",
+        "settings_aux_advanced_extra_body",
+        "settings_aux_advanced_extra_body_desc",
+        "settings_aux_advanced_api_key",
+        "settings_aux_advanced_api_key_set_hint",
+        "settings_aux_advanced_api_key_empty_hint",
+        "settings_aux_advanced_api_key_clear",
+        "settings_aux_advanced_extra_body_invalid_json",
+        "settings_aux_advanced_extra_body_object_required",
+        "settings_aux_advanced_saved",
+        "settings_aux_advanced_save_failed",
+        "settings_main_advanced_button_aria",
+        "settings_main_advanced_title",
+        "settings_main_advanced_subtitle",
+        "settings_main_advanced_saved",
+        "settings_main_advanced_save_failed",
+        "settings_aux_task_vision",
+        "settings_aux_task_vision_desc",
+        "settings_aux_task_compression",
+        "settings_aux_task_compression_desc",
+        "settings_aux_task_web_extract",
+        "settings_aux_task_web_extract_desc",
+        "settings_aux_task_session_search",
+        "settings_aux_task_session_search_desc",
+        "settings_aux_task_approval",
+        "settings_aux_task_approval_desc",
+        "settings_aux_task_mcp",
+        "settings_aux_task_mcp_desc",
+        "settings_aux_task_title_generation",
+        "settings_aux_task_title_generation_desc",
+        "settings_aux_task_skills_hub",
+        "settings_aux_task_skills_hub_desc",
+        "settings_aux_task_curator",
+        "settings_aux_task_curator_desc",
+        "settings_aux_task_kanban_decomposer",
+        "settings_aux_task_kanban_decomposer_desc",
+        "settings_aux_task_profile_describer",
+        "settings_aux_task_profile_describer_desc",
+        "settings_aux_task_triage_specifier",
+        "settings_aux_task_triage_specifier_desc",
     ]
 
     def test_all_i18n_keys_present(self):
@@ -191,6 +334,71 @@ class TestAuxiliaryModelsBackend:
             "Missing get_auxiliary_models() in api/config.py"
         )
 
+    def test_backend_aux_task_slots_include_agent_defaults(self):
+        """Backend allow-list must include newer Hermes auxiliary slots."""
+        for key in ("kanban_decomposer", "profile_describer", "triage_specifier"):
+            assert f'"{key}"' in self.CONFIG_PY
+
+    def test_backend_surfaces_advanced_fields_without_api_key_value(self, monkeypatch):
+        """Advanced fields should be visible, but API keys remain write-only."""
+        from api import config
+
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+        monkeypatch.setattr(config, "cfg", {
+            "model": {"provider": "openai", "default": "gpt-5.5"},
+            "auxiliary": {
+                "vision": {
+                    "provider": "openai",
+                    "model": "gpt-5.5",
+                    "base_url": "https://example.invalid/v1",
+                    "timeout": 42,
+                    "download_timeout": 7,
+                    "max_concurrency": 2,
+                    "extra_body": {"reasoning_effort": "none"},
+                    "api_key": "DUMMY_KEY_DO_NOT_RETURN",
+                }
+            },
+        })
+
+        data = config.get_auxiliary_models()
+        vision = next(t for t in data["tasks"] if t["task"] == "vision")
+        assert vision["base_url"] == "https://example.invalid/v1"
+        assert vision["timeout"] == 42
+        assert vision["download_timeout"] == 7
+        assert vision["max_concurrency"] == 2
+        assert vision["extra_body"] == {"reasoning_effort": "none"}
+        assert vision["api_key_set"] is True
+        assert "api_key" not in vision
+
+    def test_backend_surfaces_main_advanced_fields_without_api_key_value(self, monkeypatch):
+        """Main model advanced fields should be visible, but API keys remain write-only."""
+        from api import config
+
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+        monkeypatch.setattr(config, "cfg", {
+            "model": {
+                "provider": "openai",
+                "default": "gpt-5.5",
+                "base_url": "https://example.invalid/v1",
+                "timeout": 42,
+                "download_timeout": 7,
+                "max_concurrency": 2,
+                "extra_body": {"reasoning_effort": "none"},
+                "api_key": "DUMMY_KEY_DO_NOT_RETURN",
+            },
+            "auxiliary": {},
+        })
+
+        data = config.get_auxiliary_models()
+        main = data["main"]
+        assert main["base_url"] == "https://example.invalid/v1"
+        assert main["timeout"] == 42
+        assert main["download_timeout"] == 7
+        assert main["max_concurrency"] == 2
+        assert main["extra_body"] == {"reasoning_effort": "none"}
+        assert main["api_key_set"] is True
+        assert "api_key" not in main
+
     def test_set_auxiliary_model_function_exists(self):
         """set_auxiliary_model() must exist in api/config.py."""
         assert "def set_auxiliary_model" in self.CONFIG_PY, (
@@ -234,6 +442,171 @@ class TestAuxiliaryModelsBackend:
 
         assert "arbitrary_key" not in config_path.read_text(encoding="utf-8")
 
+    def test_set_hermes_default_model_persists_advanced_options(self, monkeypatch, tmp_path):
+        """Main-model gear-modal payload should persist supported model options."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text("model:\n  provider: openai\n  default: gpt-5.5\n", encoding="utf-8")
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+        monkeypatch.setattr(config, "invalidate_models_cache", lambda: None)
+        monkeypatch.setattr(config, "resolve_model_provider", lambda model: (model, "openai", None))
+
+        result = config.set_hermes_default_model(
+            "gpt-5.5",
+            advanced={
+                "base_url": "https://example.invalid/v1/",
+                "timeout": "45",
+                "download_timeout": "9",
+                "max_concurrency": "2",
+                "extra_body": {"reasoning_effort": "none"},
+                "api_key": "DUMMY_KEY_DO_NOT_PRINT",
+            },
+        )
+
+        assert result["ok"] is True
+        text = config_path.read_text(encoding="utf-8")
+        assert "https://example.invalid/v1" in text
+        assert "timeout: 45" in text
+        assert "download_timeout: 9" in text
+        assert "max_concurrency: 2" in text
+        assert "reasoning_effort: none" in text
+        assert "DUMMY_KEY_DO_NOT_PRINT" in text
+
+    def test_set_auxiliary_model_persists_advanced_options(self, monkeypatch, tmp_path):
+        """Gear-modal payload should persist supported per-slot options."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text("auxiliary:\n  vision:\n    provider: auto\n    model: ''\n", encoding="utf-8")
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+
+        result = config.set_auxiliary_model(
+            "vision",
+            "openai",
+            "gpt-5.5",
+            advanced={
+                "base_url": "https://example.invalid/v1/",
+                "timeout": "45",
+                "download_timeout": "9",
+                "max_concurrency": "2",
+                "extra_body": {"reasoning_effort": "none"},
+                "api_key": "DUMMY_KEY_DO_NOT_PRINT",
+            },
+        )
+
+        assert result["ok"] is True
+        text = config_path.read_text(encoding="utf-8")
+        assert "https://example.invalid/v1" in text
+        assert "timeout: 45" in text
+        assert "download_timeout: 9" in text
+        assert "max_concurrency: 2" in text
+        assert "reasoning_effort: none" in text
+        assert "DUMMY_KEY_DO_NOT_PRINT" in text
+
+    def test_set_auxiliary_model_explicit_advanced_base_url_wins_over_custom_resolution(self, monkeypatch, tmp_path):
+        """Custom-provider auto-resolution must not clobber an explicit gear base_url."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text("auxiliary:\n  vision:\n    provider: auto\n    model: ''\n", encoding="utf-8")
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+        monkeypatch.setattr(
+            config,
+            "resolve_model_provider",
+            lambda model: (model, "custom:demo", "https://resolved.invalid/v1"),
+        )
+
+        result = config.set_auxiliary_model(
+            "vision",
+            "custom:demo",
+            "demo/model",
+            advanced={"base_url": "https://manual.invalid/v1/"},
+        )
+
+        assert result["ok"] is True
+        text = config_path.read_text(encoding="utf-8")
+        assert "https://manual.invalid/v1" in text
+        assert "https://resolved.invalid/v1" not in text
+
+    def test_main_extra_body_becomes_runtime_request_overrides(self):
+        """The main-model extra_body option is live only if it reaches request_overrides."""
+        from api import config
+
+        cfg = {
+            "model": {
+                "provider": "openai",
+                "default": "gpt-5.5",
+                "extra_body": {"reasoning_effort": "none"},
+            }
+        }
+
+        overrides = config._main_model_request_overrides(cfg)
+
+        assert overrides == {"extra_body": {"reasoning_effort": "none"}}
+        assert overrides["extra_body"] is not cfg["model"]["extra_body"]
+
+
+
+    def test_set_hermes_default_model_clear_api_key_removes_key(self, monkeypatch, tmp_path):
+        """Clearing a write-only API key override should remove the key, not persist api_key: ''."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text(
+            "model:\n  provider: openai\n  default: gpt-5.5\n  api_key: old-secret\n",
+            encoding="utf-8",
+        )
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+        monkeypatch.setattr(config, "invalidate_models_cache", lambda: None)
+        monkeypatch.setattr(config, "resolve_model_provider", lambda model: (model, "openai", None))
+
+        result = config.set_hermes_default_model(
+            "gpt-5.5",
+            advanced={"api_key_clear": True, "api_key": ""},
+        )
+
+        assert result["ok"] is True
+        text = config_path.read_text(encoding="utf-8")
+        assert "old-secret" not in text
+        assert "api_key" not in text
+
+    def test_set_auxiliary_model_clears_empty_extra_body(self, monkeypatch, tmp_path):
+        """Blank extra_body from the modal should remove config noise instead of writing {}."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text(
+            "auxiliary:\n  vision:\n    provider: openai\n    model: gpt-5.5\n    extra_body:\n      reasoning_effort: none\n",
+            encoding="utf-8",
+        )
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+        monkeypatch.setattr(config, "reload_config", lambda: None)
+
+        result = config.set_auxiliary_model("vision", "openai", "gpt-5.5", advanced={"extra_body": {}})
+
+        assert result["ok"] is True
+        assert "extra_body" not in config_path.read_text(encoding="utf-8")
+
+    def test_set_auxiliary_model_validates_extra_body_object(self, monkeypatch, tmp_path):
+        """extra_body must stay an object, not arbitrary JSON."""
+        from api import config
+
+        config_path = tmp_path / "config.yaml"
+        config_path.write_text("auxiliary: {}\n", encoding="utf-8")
+        monkeypatch.setattr(config, "_get_config_path", lambda: config_path)
+
+        try:
+            config.set_auxiliary_model("vision", "openai", "gpt-5.5", advanced={"extra_body": ["bad"]})
+        except ValueError as exc:
+            assert "extra_body must be a JSON object" in str(exc)
+        else:
+            raise AssertionError("set_auxiliary_model accepted non-object extra_body")
+
     def test_model_set_route_returns_400_for_unknown_auxiliary_task(self, monkeypatch):
         """The route should surface invalid auxiliary task names as a client error."""
         from types import SimpleNamespace