✨ feat: add slash action tags, topic reference tool, and command bus system (#12860)

* ✨ feat: add slash action tags in chat input Made-with: Cursor * ✨ feat: enhance editor with new slash actions and localization updates - Added new slash actions: change tone, condense, expand, polish, rewrite, summarize, and translate. - Updated localization files for English and Chinese to include new action tags and slash commands. - Removed deprecated useSlashItems component and integrated its functionality directly into InputEditor. Signed-off-by: Innei <tukon479@gmail.com> * ✨ feat: add slash placement configuration to chat input components - Introduced `slashPlacement` prop to `ChatInputProvider`, `StoreUpdater`, and `InputEditor` for customizable slash menu positioning. - Updated initial state to include `slashPlacement` with default value 'top'. - Adjusted `ChatInput` and `InputArea` components to utilize the new `slashPlacement` prop. This enhancement allows for better control over the user interface in chat input interactions. Signed-off-by: Innei <tukon479@gmail.com> * ✨ feat: implement command bus for slash action tags processing Add command bus system to parse and execute slash commands (compact context, new topic). Refactor action tag categories from ai/prompt to command/skill. Add useEnabledSkills hook for dynamic skill registration. * feat: compress command Signed-off-by: Innei <tukon479@gmail.com> * refactor: compress Signed-off-by: Innei <tukon479@gmail.com> * fix: skill inject * ✨ feat: slash action tags with context engine integration Made-with: Cursor * ✨ feat: add topic reference builtin tool and server runtime Made-with: Cursor * ✨ feat: add topic mention items and update ReferTopic integration Made-with: Cursor * 🐛 fix: preserve editorData through assistant-group edit flow and update RichTextMessage reactively - EditState now forwards editorData from EditorModal to modifyMessageContent - modifyMessageContent accepts and passes editorData to updateMessageContent - RichTextMessage uses useEditor + effect to update document on content change instead of key-based remount - Refactored RichTextMessage plugins to use shared createChatInputRichPlugins() * ✨ feat(context-engine): add metadata types and update processors/providers Made-with: Cursor * ✨ feat(chat-input): add slash action tags and restore failed input state * 🔧 chore: update package dependencies and enhance Vite configuration - Changed @lobehub/ui dependency to a specific package URL. - Added multiple SPA entry points and layout files to the Vite warmup configuration. - Removed unused monorepo packages from sharedOptimizeDeps and added various dayjs locales for better localization support. Signed-off-by: Innei <tukon479@gmail.com> * 🔧 chore: update @lobehub/ui dependency to version 5.4.0 in package.json Signed-off-by: Innei <tukon479@gmail.com> * 🐛 fix: correct SkillsApiName.runSkill to activateSkill and update trimmed content assertions * 🐛 fix: resolve type errors in context-engine tests and InputEditor slashPlacement * 🐛 fix: update runSkill to activateSkill in conversationLifecycle test * 🐛 fix: avoid regex backtracking in placeholder parser * ✨ feat(localization): add action tags and tooltips for slash commands across multiple languages Signed-off-by: Innei <tukon479@gmail.com> * 🐛 fix: preserve file attachments when /newTopic has no text content * cleanup Signed-off-by: Innei <tukon479@gmail.com> --------- Signed-off-by: Innei <tukon479@gmail.com>
2026-04-21 17:47:27 +00:00 · 2026-03-13 22:17:36 +08:00 · 2026-03-13 22:17:36 +08:00 · 4438b559e6
commit 4438b559e6
parent d7bfd1b6c8
180 changed files with 6021 additions and 534 deletions
--- a/.agents/skills/typescript/SKILL.md
+++ b/.agents/skills/typescript/SKILL.md
@ -14,6 +14,9 @@ description: TypeScript code style and optimization guidelines. Use when writing
 - Prefer `as const satisfies XyzInterface` over plain `as const`
 - Prefer `@ts-expect-error` over `@ts-ignore` over `as any`
 - Avoid meaningless null/undefined parameters; design strict function contracts
+- Prefer ES module augmentation (`declare module '...'`) over `namespace`; do not introduce `namespace`-based extension patterns
+- When a type needs extensibility, expose a small mergeable interface at the source type and let each feature/plugin augment it locally instead of centralizing all extension fields in one registry file
+- For package-local extensibility patterns like `PipelineContext.metadata`, define the metadata fields next to the processor/provider/plugin that reads or writes them

 ## Async Patterns

--- a/locales/ar/editor.json
+++ b/locales/ar/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "أمر",
+  "actionTag.category.skill": "مهارة",
+  "actionTag.category.tool": "أداة",
+  "actionTag.tooltip.command": "يشغّل أمر الشرطة المائلة على جانب العميل قبل الإرسال.",
+  "actionTag.tooltip.skill": "يحمّل حزمة مهارات قابلة لإعادة الاستخدام لهذا الطلب.",
+  "actionTag.tooltip.tool": "يشير إلى أداة اختارها المستخدم صراحةً لهذا الطلب.",
  "actions.expand.off": "طي",
  "actions.expand.on": "توسيع",
  "actions.typobar.off": "إخفاء شريط تنسيق النص",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "الاحتفاظ بالجميع",
  "modifier.reject": "تراجع",
  "modifier.rejectAll": "تراجع عن الكل",
+  "slash.compact": "ضغط السياق",
  "slash.h1": "عنوان 1",
  "slash.h2": "عنوان 2",
  "slash.h3": "عنوان 3",
  "slash.hr": "فاصل",
+  "slash.newTopic": "الإرسال في موضوع جديد",
+  "slash.rewrite": "إعادة الصياغة",
+  "slash.summarize": "تلخيص",
  "slash.table": "جدول",
  "slash.tex": "صيغة TeX",
+  "slash.translate": "ترجمة",
  "table.delete": "حذف الجدول",
  "table.deleteColumn": "حذف العمود",
  "table.deleteRow": "حذف الصف",
--- a/locales/ar/plugin.json
+++ b/locales/ar/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "البحث عن المهارات",
  "builtins.lobe-skills.title": "المهارات",
  "builtins.lobe-tools.apiName.activateTools": "تفعيل الأدوات",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "الحصول على سياق الموضوع",
+  "builtins.lobe-topic-reference.title": "مرجع الموضوع",
  "builtins.lobe-user-memory.apiName.addContextMemory": "إضافة ذاكرة السياق",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "إضافة ذاكرة الخبرة",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "إضافة ذاكرة الهوية",
--- a/locales/bg-BG/editor.json
+++ b/locales/bg-BG/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Команда",
+  "actionTag.category.skill": "Умение",
+  "actionTag.category.tool": "Инструмент",
+  "actionTag.tooltip.command": "Изпълнява локална slash команда преди изпращане.",
+  "actionTag.tooltip.skill": "Зарежда многократно използваем пакет с умения за тази заявка.",
+  "actionTag.tooltip.tool": "Маркира инструмент, който потребителят е избрал изрично за тази заявка.",
  "actions.expand.off": "Свий",
  "actions.expand.on": "Разгъни",
  "actions.typobar.off": "Скрий лентата с форматиране",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Запази всички",
  "modifier.reject": "Отмени",
  "modifier.rejectAll": "Отмени всички",
+  "slash.compact": "Компресирай контекста",
  "slash.h1": "Заглавие 1",
  "slash.h2": "Заглавие 2",
  "slash.h3": "Заглавие 3",
  "slash.hr": "Разделител",
+  "slash.newTopic": "Изпрати в нова тема",
+  "slash.rewrite": "Пренапиши",
+  "slash.summarize": "Обобщи",
  "slash.table": "Таблица",
  "slash.tex": "TeX формула",
+  "slash.translate": "Преведи",
  "table.delete": "Изтрий таблицата",
  "table.deleteColumn": "Изтрий колона",
  "table.deleteRow": "Изтрий ред",
--- a/locales/bg-BG/plugin.json
+++ b/locales/bg-BG/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Търсене на умения",
  "builtins.lobe-skills.title": "Умения",
  "builtins.lobe-tools.apiName.activateTools": "Активиране на инструменти",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Вземи контекста на темата",
+  "builtins.lobe-topic-reference.title": "Препратка към тема",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Добавяне на контекстна памет",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Добавяне на памет за опит",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Добавяне на памет за идентичност",
--- a/locales/de-DE/editor.json
+++ b/locales/de-DE/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Befehl",
+  "actionTag.category.skill": "Fähigkeit",
+  "actionTag.category.tool": "Werkzeug",
+  "actionTag.tooltip.command": "Führt vor dem Senden einen clientseitigen Slash-Befehl aus.",
+  "actionTag.tooltip.skill": "Lädt für diese Anfrage ein wiederverwendbares Fähigkeitspaket.",
+  "actionTag.tooltip.tool": "Markiert ein Werkzeug, das der Benutzer für diese Anfrage ausdrücklich ausgewählt hat.",
  "actions.expand.off": "Einklappen",
  "actions.expand.on": "Ausklappen",
  "actions.typobar.off": "Formatierungsleiste ausblenden",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Alle beibehalten",
  "modifier.reject": "Zurücksetzen",
  "modifier.rejectAll": "Alle zurücksetzen",
+  "slash.compact": "Kontext komprimieren",
  "slash.h1": "Überschrift 1",
  "slash.h2": "Überschrift 2",
  "slash.h3": "Überschrift 3",
  "slash.hr": "Trennlinie",
+  "slash.newTopic": "In neuem Thema senden",
+  "slash.rewrite": "Umschreiben",
+  "slash.summarize": "Zusammenfassen",
  "slash.table": "Tabelle",
  "slash.tex": "TeX-Formel",
+  "slash.translate": "Übersetzen",
  "table.delete": "Tabelle löschen",
  "table.deleteColumn": "Spalte löschen",
  "table.deleteRow": "Zeile löschen",
--- a/locales/de-DE/plugin.json
+++ b/locales/de-DE/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Fähigkeiten suchen",
  "builtins.lobe-skills.title": "Fähigkeiten",
  "builtins.lobe-tools.apiName.activateTools": "Werkzeuge aktivieren",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Themenkontext abrufen",
+  "builtins.lobe-topic-reference.title": "Themenreferenz",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Kontextgedächtnis hinzufügen",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Erfahrungsgedächtnis hinzufügen",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Identitätsgedächtnis hinzufügen",
--- a/locales/en-US/editor.json
+++ b/locales/en-US/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Command",
+  "actionTag.category.skill": "Skill",
+  "actionTag.category.tool": "Tool",
+  "actionTag.tooltip.command": "Runs a client-side slash command before sending.",
+  "actionTag.tooltip.skill": "Loads a reusable skill package for this request.",
+  "actionTag.tooltip.tool": "Marks a tool the user explicitly selected for this request.",
  "actions.expand.off": "Collapse",
  "actions.expand.on": "Expand",
  "actions.typobar.off": "Hide formatting toolbar",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Keep All",
  "modifier.reject": "Revert",
  "modifier.rejectAll": "Revert All",
+  "slash.compact": "Compact context",
  "slash.h1": "Heading 1",
  "slash.h2": "Heading 2",
  "slash.h3": "Heading 3",
  "slash.hr": "Divider",
+  "slash.newTopic": "Send in new topic",
+  "slash.rewrite": "Rewrite",
+  "slash.summarize": "Summarize",
  "slash.table": "Table",
  "slash.tex": "TeX Formula",
+  "slash.translate": "Translate",
  "table.delete": "Delete table",
  "table.deleteColumn": "Delete column",
  "table.deleteRow": "Delete row",
--- a/locales/en-US/plugin.json
+++ b/locales/en-US/plugin.json
@ -202,6 +202,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Search Skills",
  "builtins.lobe-skills.title": "Skills",
  "builtins.lobe-tools.apiName.activateTools": "Activate Tools",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Get Topic Context",
+  "builtins.lobe-topic-reference.title": "Topic Reference",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Add context memory",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Add experience memory",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Add identity memory",
--- a/locales/es-ES/editor.json
+++ b/locales/es-ES/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Comando",
+  "actionTag.category.skill": "Habilidad",
+  "actionTag.category.tool": "Herramienta",
+  "actionTag.tooltip.command": "Ejecuta un comando de barra en el cliente antes de enviar.",
+  "actionTag.tooltip.skill": "Carga un paquete de habilidades reutilizable para esta solicitud.",
+  "actionTag.tooltip.tool": "Marca una herramienta que el usuario seleccionó explícitamente para esta solicitud.",
  "actions.expand.off": "Colapsar",
  "actions.expand.on": "Expandir",
  "actions.typobar.off": "Ocultar barra de formato",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Conservar todo",
  "modifier.reject": "Revertir",
  "modifier.rejectAll": "Revertir todo",
+  "slash.compact": "Compactar contexto",
  "slash.h1": "Encabezado 1",
  "slash.h2": "Encabezado 2",
  "slash.h3": "Encabezado 3",
  "slash.hr": "Separador",
+  "slash.newTopic": "Enviar en un tema nuevo",
+  "slash.rewrite": "Reescribir",
+  "slash.summarize": "Resumir",
  "slash.table": "Tabla",
  "slash.tex": "Fórmula TeX",
+  "slash.translate": "Traducir",
  "table.delete": "Eliminar tabla",
  "table.deleteColumn": "Eliminar columna",
  "table.deleteRow": "Eliminar fila",
--- a/locales/es-ES/plugin.json
+++ b/locales/es-ES/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Buscar Habilidades",
  "builtins.lobe-skills.title": "Habilidades",
  "builtins.lobe-tools.apiName.activateTools": "Activar Herramientas",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Obtener contexto del tema",
+  "builtins.lobe-topic-reference.title": "Referencia de tema",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Agregar memoria de contexto",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Agregar memoria de experiencia",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Agregar memoria de identidad",
--- a/locales/fa-IR/editor.json
+++ b/locales/fa-IR/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "دستور",
+  "actionTag.category.skill": "مهارت",
+  "actionTag.category.tool": "ابزار",
+  "actionTag.tooltip.command": "پیش از ارسال، یک دستور اسلش سمت کلاینت را اجرا می‌کند.",
+  "actionTag.tooltip.skill": "برای این درخواست، یک بسته مهارت قابل استفاده مجدد را بارگذاری می‌کند.",
+  "actionTag.tooltip.tool": "ابزاری را که کاربر به‌طور صریح برای این درخواست انتخاب کرده است علامت‌گذاری می‌کند.",
  "actions.expand.off": "جمع کردن",
  "actions.expand.on": "باز کردن",
  "actions.typobar.off": "پنهان کردن نوار ابزار قالب‌بندی",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "نگه‌داشتن همه",
  "modifier.reject": "بازگرداندن",
  "modifier.rejectAll": "بازگرداندن همه",
+  "slash.compact": "فشرده‌سازی زمینه",
  "slash.h1": "سرفصل ۱",
  "slash.h2": "سرفصل ۲",
  "slash.h3": "سرفصل ۳",
  "slash.hr": "خط جداکننده",
+  "slash.newTopic": "ارسال در موضوع جدید",
+  "slash.rewrite": "بازنویسی",
+  "slash.summarize": "خلاصه‌سازی",
  "slash.table": "جدول",
  "slash.tex": "فرمول TeX",
+  "slash.translate": "ترجمه",
  "table.delete": "حذف جدول",
  "table.deleteColumn": "حذف ستون",
  "table.deleteRow": "حذف ردیف",
--- a/locales/fa-IR/plugin.json
+++ b/locales/fa-IR/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "جستجوی مهارت‌ها",
  "builtins.lobe-skills.title": "مهارت‌ها",
  "builtins.lobe-tools.apiName.activateTools": "فعال کردن ابزارها",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "دریافت زمینه موضوع",
+  "builtins.lobe-topic-reference.title": "ارجاع به موضوع",
  "builtins.lobe-user-memory.apiName.addContextMemory": "افزودن حافظه زمینه",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "افزودن حافظه تجربه",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "افزودن حافظه هویتی",
--- a/locales/fr-FR/editor.json
+++ b/locales/fr-FR/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Commande",
+  "actionTag.category.skill": "Compétence",
+  "actionTag.category.tool": "Outil",
+  "actionTag.tooltip.command": "Exécute une commande slash côté client avant l’envoi.",
+  "actionTag.tooltip.skill": "Charge un paquet de compétences réutilisable pour cette requête.",
+  "actionTag.tooltip.tool": "Marque un outil que l’utilisateur a explicitement sélectionné pour cette requête.",
  "actions.expand.off": "Réduire",
  "actions.expand.on": "Développer",
  "actions.typobar.off": "Masquer la barre de mise en forme",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Tout conserver",
  "modifier.reject": "Annuler",
  "modifier.rejectAll": "Tout annuler",
+  "slash.compact": "Compacter le contexte",
  "slash.h1": "Titre 1",
  "slash.h2": "Titre 2",
  "slash.h3": "Titre 3",
  "slash.hr": "Séparateur",
+  "slash.newTopic": "Envoyer dans un nouveau sujet",
+  "slash.rewrite": "Réécrire",
+  "slash.summarize": "Résumer",
  "slash.table": "Tableau",
  "slash.tex": "Formule TeX",
+  "slash.translate": "Traduire",
  "table.delete": "Supprimer le tableau",
  "table.deleteColumn": "Supprimer la colonne",
  "table.deleteRow": "Supprimer la ligne",
--- a/locales/fr-FR/plugin.json
+++ b/locales/fr-FR/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Rechercher des Compétences",
  "builtins.lobe-skills.title": "Compétences",
  "builtins.lobe-tools.apiName.activateTools": "Activer les Outils",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Obtenir le contexte du sujet",
+  "builtins.lobe-topic-reference.title": "Référence de sujet",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Ajouter une mémoire de contexte",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Ajouter une mémoire d'expérience",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Ajouter une mémoire d'identité",
--- a/locales/it-IT/editor.json
+++ b/locales/it-IT/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Comando",
+  "actionTag.category.skill": "Abilità",
+  "actionTag.category.tool": "Strumento",
+  "actionTag.tooltip.command": "Esegue un comando slash lato client prima dell'invio.",
+  "actionTag.tooltip.skill": "Carica un pacchetto di abilità riutilizzabile per questa richiesta.",
+  "actionTag.tooltip.tool": "Contrassegna uno strumento selezionato esplicitamente dall'utente per questa richiesta.",
  "actions.expand.off": "Comprimi",
  "actions.expand.on": "Espandi",
  "actions.typobar.off": "Nascondi barra di formattazione",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Mantieni tutto",
  "modifier.reject": "Ripristina",
  "modifier.rejectAll": "Ripristina tutto",
+  "slash.compact": "Compatta il contesto",
  "slash.h1": "Titolo 1",
  "slash.h2": "Titolo 2",
  "slash.h3": "Titolo 3",
  "slash.hr": "Separatore",
+  "slash.newTopic": "Invia in un nuovo argomento",
+  "slash.rewrite": "Riscrivi",
+  "slash.summarize": "Riassumi",
  "slash.table": "Tabella",
  "slash.tex": "Formula TeX",
+  "slash.translate": "Traduci",
  "table.delete": "Elimina tabella",
  "table.deleteColumn": "Elimina colonna",
  "table.deleteRow": "Elimina riga",
--- a/locales/it-IT/plugin.json
+++ b/locales/it-IT/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Cerca Abilità",
  "builtins.lobe-skills.title": "Abilità",
  "builtins.lobe-tools.apiName.activateTools": "Attiva Strumenti",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Ottieni contesto dell'argomento",
+  "builtins.lobe-topic-reference.title": "Riferimento argomento",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Aggiungi memoria contestuale",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Aggiungi memoria esperienziale",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Aggiungi memoria identità",
--- a/locales/ja-JP/editor.json
+++ b/locales/ja-JP/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "コマンド",
+  "actionTag.category.skill": "スキル",
+  "actionTag.category.tool": "ツール",
+  "actionTag.tooltip.command": "送信前にクライアント側のスラッシュコマンドを実行します。",
+  "actionTag.tooltip.skill": "このリクエスト用に再利用可能なスキルパッケージを読み込みます。",
+  "actionTag.tooltip.tool": "このリクエストでユーザーが明示的に選択したツールを示します。",
  "actions.expand.off": "折りたたむ",
  "actions.expand.on": "展開する",
  "actions.typobar.off": "書式ツールバーを非表示",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "すべて承諾する",
  "modifier.reject": "取り消し",
  "modifier.rejectAll": "すべてを取り消す",
+  "slash.compact": "コンテキストを圧縮",
  "slash.h1": "見出し1",
  "slash.h2": "見出し2",
  "slash.h3": "見出し3",
  "slash.hr": "区切り線",
+  "slash.newTopic": "新しいトピックで送信",
+  "slash.rewrite": "書き直す",
+  "slash.summarize": "要約",
  "slash.table": "表",
  "slash.tex": "TeX 数式",
+  "slash.translate": "翻訳",
  "table.delete": "表を削除",
  "table.deleteColumn": "列を削除",
  "table.deleteRow": "行を削除",
--- a/locales/ja-JP/plugin.json
+++ b/locales/ja-JP/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "スキルを検索",
  "builtins.lobe-skills.title": "スキル",
  "builtins.lobe-tools.apiName.activateTools": "ツールをアクティブ化",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "トピックコンテキストを取得",
+  "builtins.lobe-topic-reference.title": "トピック参照",
  "builtins.lobe-user-memory.apiName.addContextMemory": "コンテキスト記憶を追加",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "経験記憶を追加",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "アイデンティティ記憶を追加",
--- a/locales/ko-KR/editor.json
+++ b/locales/ko-KR/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "명령",
+  "actionTag.category.skill": "스킬",
+  "actionTag.category.tool": "도구",
+  "actionTag.tooltip.command": "전송 전에 클라이언트 측 슬래시 명령을 실행합니다.",
+  "actionTag.tooltip.skill": "이번 요청에 사용할 재사용 가능한 스킬 패키지를 불러옵니다.",
+  "actionTag.tooltip.tool": "이번 요청에서 사용자가 명시적으로 선택한 도구를 표시합니다.",
  "actions.expand.off": "접기",
  "actions.expand.on": "펼치기",
  "actions.typobar.off": "서식 도구 모음 숨기기",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "모두 수락",
  "modifier.reject": "취소",
  "modifier.rejectAll": "모두 취소",
+  "slash.compact": "컨텍스트 압축",
  "slash.h1": "제목 1",
  "slash.h2": "제목 2",
  "slash.h3": "제목 3",
  "slash.hr": "구분선",
+  "slash.newTopic": "새 토픽으로 보내기",
+  "slash.rewrite": "다시 쓰기",
+  "slash.summarize": "요약",
  "slash.table": "표",
  "slash.tex": "TeX 수식",
+  "slash.translate": "번역",
  "table.delete": "표 삭제",
  "table.deleteColumn": "열 삭제",
  "table.deleteRow": "행 삭제",
--- a/locales/ko-KR/plugin.json
+++ b/locales/ko-KR/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "스킬 검색",
  "builtins.lobe-skills.title": "스킬",
  "builtins.lobe-tools.apiName.activateTools": "도구 활성화",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "토픽 컨텍스트 가져오기",
+  "builtins.lobe-topic-reference.title": "토픽 참조",
  "builtins.lobe-user-memory.apiName.addContextMemory": "상황 기억 추가",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "경험 기억 추가",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "신원 기억 추가",
--- a/locales/nl-NL/editor.json
+++ b/locales/nl-NL/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Commando",
+  "actionTag.category.skill": "Vaardigheid",
+  "actionTag.category.tool": "Hulpmiddel",
+  "actionTag.tooltip.command": "Voert vóór het verzenden een slash-commando aan de clientzijde uit.",
+  "actionTag.tooltip.skill": "Laadt voor dit verzoek een herbruikbaar vaardigheidspakket.",
+  "actionTag.tooltip.tool": "Markeert een hulpmiddel dat de gebruiker expliciet voor dit verzoek heeft geselecteerd.",
  "actions.expand.off": "Samenvouwen",
  "actions.expand.on": "Uitvouwen",
  "actions.typobar.off": "Opmaakwerkbalk verbergen",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Alles behouden",
  "modifier.reject": "Ongedaan maken",
  "modifier.rejectAll": "Alles ongedaan maken",
+  "slash.compact": "Context comprimeren",
  "slash.h1": "Kop 1",
  "slash.h2": "Kop 2",
  "slash.h3": "Kop 3",
  "slash.hr": "Scheiding",
+  "slash.newTopic": "Verzenden in nieuw onderwerp",
+  "slash.rewrite": "Herschrijven",
+  "slash.summarize": "Samenvatten",
  "slash.table": "Tabel",
  "slash.tex": "TeX-formule",
+  "slash.translate": "Vertalen",
  "table.delete": "Tabel verwijderen",
  "table.deleteColumn": "Kolom verwijderen",
  "table.deleteRow": "Rij verwijderen",
--- a/locales/nl-NL/plugin.json
+++ b/locales/nl-NL/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Vaardigheden Zoeken",
  "builtins.lobe-skills.title": "Vaardigheden",
  "builtins.lobe-tools.apiName.activateTools": "Hulpmiddelen Activeren",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Onderwerpcontext ophalen",
+  "builtins.lobe-topic-reference.title": "Onderwerpverwijzing",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Contextgeheugen toevoegen",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Ervaringsgeheugen toevoegen",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Identiteitsgeheugen toevoegen",
--- a/locales/pl-PL/editor.json
+++ b/locales/pl-PL/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Polecenie",
+  "actionTag.category.skill": "Umiejętność",
+  "actionTag.category.tool": "Narzędzie",
+  "actionTag.tooltip.command": "Uruchamia polecenie slash po stronie klienta przed wysłaniem.",
+  "actionTag.tooltip.skill": "Wczytuje pakiet umiejętności wielokrotnego użytku dla tego żądania.",
+  "actionTag.tooltip.tool": "Oznacza narzędzie, które użytkownik jawnie wybrał dla tego żądania.",
  "actions.expand.off": "Zwiń",
  "actions.expand.on": "Rozwiń",
  "actions.typobar.off": "Ukryj pasek formatowania",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Zachowaj wszystkie",
  "modifier.reject": "Cofnij",
  "modifier.rejectAll": "Cofnij wszystkie",
+  "slash.compact": "Kompresuj kontekst",
  "slash.h1": "Nagłówek 1",
  "slash.h2": "Nagłówek 2",
  "slash.h3": "Nagłówek 3",
  "slash.hr": "Separator",
+  "slash.newTopic": "Wyślij w nowym temacie",
+  "slash.rewrite": "Przepisz",
+  "slash.summarize": "Podsumuj",
  "slash.table": "Tabela",
  "slash.tex": "Formuła TeX",
+  "slash.translate": "Tłumacz",
  "table.delete": "Usuń tabelę",
  "table.deleteColumn": "Usuń kolumnę",
  "table.deleteRow": "Usuń wiersz",
--- a/locales/pl-PL/plugin.json
+++ b/locales/pl-PL/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Wyszukaj Umiejętności",
  "builtins.lobe-skills.title": "Umiejętności",
  "builtins.lobe-tools.apiName.activateTools": "Aktywuj Narzędzia",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Pobierz kontekst tematu",
+  "builtins.lobe-topic-reference.title": "Odwołanie do tematu",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Dodaj pamięć kontekstu",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Dodaj pamięć doświadczenia",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Dodaj pamięć tożsamości",
--- a/locales/pt-BR/editor.json
+++ b/locales/pt-BR/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Comando",
+  "actionTag.category.skill": "Habilidade",
+  "actionTag.category.tool": "Ferramenta",
+  "actionTag.tooltip.command": "Executa um comando slash no cliente antes do envio.",
+  "actionTag.tooltip.skill": "Carrega um pacote de habilidades reutilizável para esta solicitação.",
+  "actionTag.tooltip.tool": "Marca uma ferramenta que o usuário selecionou explicitamente para esta solicitação.",
  "actions.expand.off": "Recolher",
  "actions.expand.on": "Expandir",
  "actions.typobar.off": "Ocultar barra de formatação",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Manter tudo",
  "modifier.reject": "Reverter",
  "modifier.rejectAll": "Reverter tudo",
+  "slash.compact": "Compactar contexto",
  "slash.h1": "Título 1",
  "slash.h2": "Título 2",
  "slash.h3": "Título 3",
  "slash.hr": "Divisor",
+  "slash.newTopic": "Enviar em novo tópico",
+  "slash.rewrite": "Reescrever",
+  "slash.summarize": "Resumir",
  "slash.table": "Tabela",
  "slash.tex": "Fórmula TeX",
+  "slash.translate": "Traduzir",
  "table.delete": "Excluir tabela",
  "table.deleteColumn": "Excluir coluna",
  "table.deleteRow": "Excluir linha",
--- a/locales/pt-BR/plugin.json
+++ b/locales/pt-BR/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Buscar Habilidades",
  "builtins.lobe-skills.title": "Habilidades",
  "builtins.lobe-tools.apiName.activateTools": "Ativar Ferramentas",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Obter contexto do tópico",
+  "builtins.lobe-topic-reference.title": "Referência de tópico",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Adicionar memória de contexto",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Adicionar memória de experiência",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Adicionar memória de identidade",
--- a/locales/ru-RU/editor.json
+++ b/locales/ru-RU/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Команда",
+  "actionTag.category.skill": "Навык",
+  "actionTag.category.tool": "Инструмент",
+  "actionTag.tooltip.command": "Выполняет клиентскую slash-команду перед отправкой.",
+  "actionTag.tooltip.skill": "Загружает для этого запроса переиспользуемый пакет навыков.",
+  "actionTag.tooltip.tool": "Помечает инструмент, который пользователь явно выбрал для этого запроса.",
  "actions.expand.off": "Свернуть",
  "actions.expand.on": "Развернуть",
  "actions.typobar.off": "Скрыть панель форматирования",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Оставить все",
  "modifier.reject": "Отменить",
  "modifier.rejectAll": "Отменить все",
+  "slash.compact": "Сжать контекст",
  "slash.h1": "Заголовок 1",
  "slash.h2": "Заголовок 2",
  "slash.h3": "Заголовок 3",
  "slash.hr": "Разделитель",
+  "slash.newTopic": "Отправить в новую тему",
+  "slash.rewrite": "Переписать",
+  "slash.summarize": "Суммировать",
  "slash.table": "Таблица",
  "slash.tex": "Формула TeX",
+  "slash.translate": "Перевести",
  "table.delete": "Удалить таблицу",
  "table.deleteColumn": "Удалить столбец",
  "table.deleteRow": "Удалить строку",
--- a/locales/ru-RU/plugin.json
+++ b/locales/ru-RU/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Поиск навыков",
  "builtins.lobe-skills.title": "Навыки",
  "builtins.lobe-tools.apiName.activateTools": "Активировать инструменты",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Получить контекст темы",
+  "builtins.lobe-topic-reference.title": "Ссылка на тему",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Добавить контекстную память",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Добавить память опыта",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Добавить память личности",
--- a/locales/tr-TR/editor.json
+++ b/locales/tr-TR/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Komut",
+  "actionTag.category.skill": "Beceri",
+  "actionTag.category.tool": "Araç",
+  "actionTag.tooltip.command": "Göndermeden önce istemci tarafında bir slash komutu çalıştırır.",
+  "actionTag.tooltip.skill": "Bu istek için yeniden kullanılabilir bir beceri paketini yükler.",
+  "actionTag.tooltip.tool": "Kullanıcının bu istek için açıkça seçtiği bir aracı işaretler.",
  "actions.expand.off": "Daralt",
  "actions.expand.on": "Genişlet",
  "actions.typobar.off": "Biçimlendirme araç çubuğunu gizle",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Tümünü koru",
  "modifier.reject": "Geri al",
  "modifier.rejectAll": "Tümünü geri al",
+  "slash.compact": "Bağlamı sıkıştır",
  "slash.h1": "Başlık 1",
  "slash.h2": "Başlık 2",
  "slash.h3": "Başlık 3",
  "slash.hr": "Ayraç",
+  "slash.newTopic": "Yeni konuda gönder",
+  "slash.rewrite": "Yeniden yaz",
+  "slash.summarize": "Özetle",
  "slash.table": "Tablo",
  "slash.tex": "TeX Formülü",
+  "slash.translate": "Çevir",
  "table.delete": "Tabloyu sil",
  "table.deleteColumn": "Sütunu sil",
  "table.deleteRow": "Satırı sil",
--- a/locales/tr-TR/plugin.json
+++ b/locales/tr-TR/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Becerileri Ara",
  "builtins.lobe-skills.title": "Beceriler",
  "builtins.lobe-tools.apiName.activateTools": "Araçları Etkinleştir",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Konu bağlamını al",
+  "builtins.lobe-topic-reference.title": "Konu referansı",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Bağlam hafızası ekle",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Deneyim hafızası ekle",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Kimlik hafızası ekle",
--- a/locales/vi-VN/editor.json
+++ b/locales/vi-VN/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "Lệnh",
+  "actionTag.category.skill": "Kỹ năng",
+  "actionTag.category.tool": "Công cụ",
+  "actionTag.tooltip.command": "Chạy lệnh slash phía client trước khi gửi.",
+  "actionTag.tooltip.skill": "Tải gói kỹ năng có thể tái sử dụng cho yêu cầu này.",
+  "actionTag.tooltip.tool": "Đánh dấu công cụ mà người dùng đã chọn rõ ràng cho yêu cầu này.",
  "actions.expand.off": "Thu gọn",
  "actions.expand.on": "Mở rộng",
  "actions.typobar.off": "Ẩn thanh công cụ định dạng",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "Giữ tất cả",
  "modifier.reject": "Hoàn tác",
  "modifier.rejectAll": "Hoàn tác tất cả",
+  "slash.compact": "Nén ngữ cảnh",
  "slash.h1": "Tiêu đề 1",
  "slash.h2": "Tiêu đề 2",
  "slash.h3": "Tiêu đề 3",
  "slash.hr": "Đường phân cách",
+  "slash.newTopic": "Gửi trong chủ đề mới",
+  "slash.rewrite": "Viết lại",
+  "slash.summarize": "Tóm tắt",
  "slash.table": "Bảng",
  "slash.tex": "Công thức TeX",
+  "slash.translate": "Dịch",
  "table.delete": "Xóa bảng",
  "table.deleteColumn": "Xóa cột",
  "table.deleteRow": "Xóa hàng",
--- a/locales/vi-VN/plugin.json
+++ b/locales/vi-VN/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "Tìm kiếm Kỹ năng",
  "builtins.lobe-skills.title": "Kỹ năng",
  "builtins.lobe-tools.apiName.activateTools": "Kích hoạt Công cụ",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "Lấy ngữ cảnh chủ đề",
+  "builtins.lobe-topic-reference.title": "Tham chiếu chủ đề",
  "builtins.lobe-user-memory.apiName.addContextMemory": "Thêm trí nhớ ngữ cảnh",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "Thêm trí nhớ kinh nghiệm",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "Thêm trí nhớ danh tính",
--- a/locales/zh-CN/editor.json
+++ b/locales/zh-CN/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "指令",
+  "actionTag.category.skill": "技能",
+  "actionTag.category.tool": "工具",
+  "actionTag.tooltip.command": "发送前会先在客户端执行这条 slash 指令。",
+  "actionTag.tooltip.skill": "表示这是一条可为本次请求加载的技能包。",
+  "actionTag.tooltip.tool": "表示这是用户为本次请求显式选中的工具。",
  "actions.expand.off": "收起",
  "actions.expand.on": "展开",
  "actions.typobar.off": "隐藏格式工具栏",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "全部保留",
  "modifier.reject": "撤销",
  "modifier.rejectAll": "全部撤销",
+  "slash.compact": "压缩上下文",
  "slash.h1": "一级标题",
  "slash.h2": "二级标题",
  "slash.h3": "三级标题",
  "slash.hr": "分割线",
+  "slash.newTopic": "在新话题中发送",
+  "slash.rewrite": "重写",
+  "slash.summarize": "总结",
  "slash.table": "表格",
  "slash.tex": "TeX 公式",
+  "slash.translate": "翻译",
  "table.delete": "删除表格",
  "table.deleteColumn": "删除列",
  "table.deleteRow": "删除行",
--- a/locales/zh-CN/plugin.json
+++ b/locales/zh-CN/plugin.json
@ -202,6 +202,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "搜索技能",
  "builtins.lobe-skills.title": "技能",
  "builtins.lobe-tools.apiName.activateTools": "激活工具",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "获取话题上下文",
+  "builtins.lobe-topic-reference.title": "话题引用",
  "builtins.lobe-user-memory.apiName.addContextMemory": "添加情境记忆",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "添加经验记忆",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "添加身份记忆",
--- a/locales/zh-TW/editor.json
+++ b/locales/zh-TW/editor.json
@ -1,4 +1,10 @@
 {
+  "actionTag.category.command": "命令",
+  "actionTag.category.skill": "技能",
+  "actionTag.category.tool": "工具",
+  "actionTag.tooltip.command": "在發送前執行客戶端斜線命令。",
+  "actionTag.tooltip.skill": "為此次請求載入可重用的技能包。",
+  "actionTag.tooltip.tool": "標記使用者在此次請求中明確選擇的工具。",
  "actions.expand.off": "收合",
  "actions.expand.on": "展開",
  "actions.typobar.off": "隱藏格式工具列",
@ -34,12 +40,17 @@
  "modifier.acceptAll": "全部接受",
  "modifier.reject": "撤銷",
  "modifier.rejectAll": "全部取消",
+  "slash.compact": "壓縮上下文",
  "slash.h1": "一級標題",
  "slash.h2": "二級標題",
  "slash.h3": "三級標題",
  "slash.hr": "分隔線",
+  "slash.newTopic": "在新話題中發送",
+  "slash.rewrite": "改寫",
+  "slash.summarize": "摘要",
  "slash.table": "表格",
  "slash.tex": "TeX 公式",
+  "slash.translate": "翻譯",
  "table.delete": "刪除表格",
  "table.deleteColumn": "刪除列",
  "table.deleteRow": "刪除行",
--- a/locales/zh-TW/plugin.json
+++ b/locales/zh-TW/plugin.json
@ -201,6 +201,8 @@
  "builtins.lobe-skills.apiName.searchSkill": "搜尋技能",
  "builtins.lobe-skills.title": "技能",
  "builtins.lobe-tools.apiName.activateTools": "啟用工具",
+  "builtins.lobe-topic-reference.apiName.getTopicContext": "取得話題上下文",
+  "builtins.lobe-topic-reference.title": "話題引用",
  "builtins.lobe-user-memory.apiName.addContextMemory": "新增情境記憶",
  "builtins.lobe-user-memory.apiName.addExperienceMemory": "新增經驗記憶",
  "builtins.lobe-user-memory.apiName.addIdentityMemory": "新增身份記憶",
--- a/package.json
+++ b/package.json
@ -195,6 +195,7 @@
    "@icons-pack/react-simple-icons": "^13.8.0",
    "@khmyznikov/pwa-install": "0.3.9",
    "@langchain/community": "^0.3.59",
+    "@lexical/utils": "^0.39.0",
    "@lobechat/adapter-lark": "workspace:*",
    "@lobechat/adapter-qq": "workspace:*",
    "@lobechat/agent-runtime": "workspace:*",
@ -216,6 +217,7 @@
    "@lobechat/builtin-tool-skill-store": "workspace:*",
    "@lobechat/builtin-tool-skills": "workspace:*",
    "@lobechat/builtin-tool-tools": "workspace:*",
+    "@lobechat/builtin-tool-topic-reference": "workspace:*",
    "@lobechat/builtin-tool-web-browsing": "workspace:*",
    "@lobechat/builtin-tools": "workspace:*",
    "@lobechat/business-config": "workspace:*",
@ -312,6 +314,7 @@
    "fflate": "^0.8.2",
    "ffmpeg-static": "^5.3.0",
    "file-type": "^21.3.0",
+    "fuse.js": "^7.0.0",
    "gray-matter": "^4.0.3",
    "html-to-text": "^9.0.5",
    "i18next": "^25.8.0",
@ -326,6 +329,7 @@
    "langchain": "^0.3.37",
    "langfuse": "^3.38.6",
    "langfuse-core": "^3.38.6",
+    "lexical": "^0.39.0",
    "lucide-react": "^0.562.0",
    "mammoth": "^1.11.0",
    "marked": "^17.0.1",
--- a/packages/builtin-tool-agent-management/src/executor.ts
+++ b/packages/builtin-tool-agent-management/src/executor.ts
@ -67,8 +67,14 @@ class AgentManagementExecutor extends BaseExecutor<typeof AgentManagementApiName
    params: CallAgentParams,
    ctx: BuiltinToolContext,
  ): Promise<BuiltinToolResult> => {
-    const { agentId, instruction, runAsTask, taskTitle, timeout, skipCallSupervisor = false } =
-      params;
+    const {
+      agentId,
+      instruction,
+      runAsTask,
+      taskTitle,
+      timeout,
+      skipCallSupervisor = false,
+    } = params;

    if (runAsTask) {
      // Execute as async task using GTD exec_task pattern
@ -184,17 +190,27 @@ class AgentManagementExecutor extends BaseExecutor<typeof AgentManagementApiName
          return;
        }

+        // If instruction is provided, inject it as a virtual User Message
+        // Same pattern as group orchestration's call_agent executor:
+        // virtual message with <speaker> tag gives the called agent clear direction
+        const now = Date.now();
+        const messagesWithInstruction = instruction
+          ? [
+              ...messages,
+              {
+                content: `<speaker name="Supervisor" />\n${instruction}`,
+                createdAt: now,
+                id: `virtual_speak_instruction_${now}`,
+                role: 'user' as const,
+                updatedAt: now,
+              },
+            ]
+          : messages;
+
        try {
-          // Execute with subAgentId + scope: 'sub_agent'
-          // - context.agentId = current agent (for message storage and message.agentId)
-          // - context.topicId = current topic
-          // - context.subAgentId = target agent (for agent config - model, prompt, etc.)
-          // - context.scope = 'sub_agent' (indicates this is agent-to-agent call, not group)
-          // This will create messages in current agent's conversation but use target agent's config
-          // The message.agentId will still be current agent, but metadata stores subAgentId + scope
          await get().internal_execAgentRuntime({
            context: { ...conversationContext, subAgentId: agentId, scope: 'sub_agent' },
-            messages,
+            messages: messagesWithInstruction,
            parentMessageId: ctx.messageId,
            parentMessageType: 'tool',
          });
--- a/packages/builtin-tool-topic-reference/package.json
+++ b/packages/builtin-tool-topic-reference/package.json
@ -0,0 +1,13 @@
+{
+  "name": "@lobechat/builtin-tool-topic-reference",
+  "version": "1.0.0",
+  "private": true,
+  "exports": {
+    ".": "./src/index.ts",
+    "./executor": "./src/executor/index.ts"
+  },
+  "main": "./src/index.ts",
+  "devDependencies": {
+    "@lobechat/types": "workspace:*"
+  }
+}
--- a/packages/builtin-tool-topic-reference/src/executor/index.ts
+++ b/packages/builtin-tool-topic-reference/src/executor/index.ts
@ -0,0 +1,40 @@
+import type { BuiltinToolContext, BuiltinToolResult } from '@lobechat/types';
+import { BaseExecutor } from '@lobechat/types';
+
+import { lambdaClient } from '@/libs/trpc/client';
+
+import { TopicReferenceIdentifier } from '../types';
+
+const TopicReferenceApiName = {
+  getTopicContext: 'getTopicContext',
+} as const;
+
+interface GetTopicContextParams {
+  topicId: string;
+}
+
+class TopicReferenceExecutor extends BaseExecutor<typeof TopicReferenceApiName> {
+  readonly identifier = TopicReferenceIdentifier;
+  protected readonly apiEnum = TopicReferenceApiName;
+
+  getTopicContext = async (
+    params: GetTopicContextParams,
+    _ctx: BuiltinToolContext,
+  ): Promise<BuiltinToolResult> => {
+    const { topicId } = params;
+
+    if (!topicId) {
+      return { content: 'topicId is required', success: false };
+    }
+
+    try {
+      const result = await lambdaClient.topic.getTopicContext.query({ topicId });
+      return { content: result.content, success: result.success };
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      return { content: `Failed to fetch topic context: ${errorMessage}`, success: false };
+    }
+  };
+}
+
+export const topicReferenceExecutor = new TopicReferenceExecutor();
--- a/packages/builtin-tool-topic-reference/src/index.ts
+++ b/packages/builtin-tool-topic-reference/src/index.ts
@ -0,0 +1,6 @@
+export { TopicReferenceManifest } from './manifest';
+export {
+  TopicReferenceApiName,
+  type TopicReferenceApiNameType,
+  TopicReferenceIdentifier,
+} from './types';
--- a/packages/builtin-tool-topic-reference/src/manifest.ts
+++ b/packages/builtin-tool-topic-reference/src/manifest.ts
@ -0,0 +1,32 @@
+import { type BuiltinToolManifest } from '@lobechat/types';
+
+import { TopicReferenceApiName, TopicReferenceIdentifier } from './types';
+
+export const TopicReferenceManifest: BuiltinToolManifest = {
+  api: [
+    {
+      description:
+        'Retrieve context from a referenced topic conversation. Returns the topic summary if available, otherwise returns the most recent messages. Use this when you see a topic reference tag in the user message and need to understand what was discussed in that topic.',
+      name: TopicReferenceApiName.getTopicContext,
+      parameters: {
+        additionalProperties: false,
+        properties: {
+          topicId: {
+            description: 'The ID of the topic to retrieve context from',
+            type: 'string',
+          },
+        },
+        required: ['topicId'],
+        type: 'object',
+      },
+    },
+  ],
+  identifier: TopicReferenceIdentifier,
+  meta: {
+    avatar: '📋',
+    description: 'Retrieve context from referenced topic conversations',
+    title: 'Topic Reference',
+  },
+  systemRole: '',
+  type: 'builtin',
+};
--- a/packages/builtin-tool-topic-reference/src/types.ts
+++ b/packages/builtin-tool-topic-reference/src/types.ts
@ -0,0 +1,8 @@
+export const TopicReferenceIdentifier = 'lobe-topic-reference';
+
+export const TopicReferenceApiName = {
+  getTopicContext: 'getTopicContext',
+} as const;
+
+export type TopicReferenceApiNameType =
+  (typeof TopicReferenceApiName)[keyof typeof TopicReferenceApiName];
--- a/packages/builtin-tool-topic-reference/tsconfig.json
+++ b/packages/builtin-tool-topic-reference/tsconfig.json
@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "declaration": true,
+    "outDir": "dist",
+    "rootDir": "src",
+    "strict": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true
+  },
+  "exclude": ["node_modules"],
+  "include": ["src/**/*"]
+}
--- a/packages/builtin-tools/package.json
+++ b/packages/builtin-tools/package.json
@ -30,6 +30,7 @@
    "@lobechat/builtin-tool-skill-store": "workspace:*",
    "@lobechat/builtin-tool-skills": "workspace:*",
    "@lobechat/builtin-tool-tools": "workspace:*",
+    "@lobechat/builtin-tool-topic-reference": "workspace:*",
    "@lobechat/builtin-tool-web-browsing": "workspace:*",
    "@lobechat/const": "workspace:*"
  },
--- a/packages/builtin-tools/src/identifiers.ts
+++ b/packages/builtin-tools/src/identifiers.ts
@ -13,6 +13,7 @@ import { PageAgentManifest } from '@lobechat/builtin-tool-page-agent';
 import { SkillStoreManifest } from '@lobechat/builtin-tool-skill-store';
 import { SkillsManifest } from '@lobechat/builtin-tool-skills';
 import { LobeToolsManifest } from '@lobechat/builtin-tool-tools';
+import { TopicReferenceManifest } from '@lobechat/builtin-tool-topic-reference';
 import { WebBrowsingManifest } from '@lobechat/builtin-tool-web-browsing';

 export const builtinToolIdentifiers: string[] = [
@ -30,6 +31,7 @@ export const builtinToolIdentifiers: string[] = [
  GTDManifest.identifier,
  MemoryManifest.identifier,
  NotebookManifest.identifier,
+  TopicReferenceManifest.identifier,
  LobeToolsManifest.identifier,
  SkillStoreManifest.identifier,
 ];
--- a/packages/builtin-tools/src/index.ts
+++ b/packages/builtin-tools/src/index.ts
@ -14,6 +14,7 @@ import { RemoteDeviceManifest } from '@lobechat/builtin-tool-remote-device';
 import { SkillStoreManifest } from '@lobechat/builtin-tool-skill-store';
 import { SkillsManifest } from '@lobechat/builtin-tool-skills';
 import { LobeToolsManifest } from '@lobechat/builtin-tool-tools';
+import { TopicReferenceManifest } from '@lobechat/builtin-tool-topic-reference';
 import { WebBrowsingManifest } from '@lobechat/builtin-tool-web-browsing';
 import { isDesktop } from '@lobechat/const';
 import { type LobeBuiltinTool } from '@lobechat/types';
@ -31,6 +32,7 @@ export const defaultToolIds = [
  MemoryManifest.identifier,
  LocalSystemManifest.identifier,
  CloudSandboxManifest.identifier,
+  TopicReferenceManifest.identifier,
 ];

 /**
@ -147,4 +149,11 @@ export const builtinTools: LobeBuiltinTool[] = [
    manifest: RemoteDeviceManifest,
    type: 'builtin',
  },
+  {
+    discoverable: false,
+    hidden: true,
+    identifier: TopicReferenceManifest.identifier,
+    manifest: TopicReferenceManifest,
+    type: 'builtin',
+  },
 ];
--- a/packages/context-engine/src/tests/metadata.types.test.ts
+++ b/packages/context-engine/src/tests/metadata.types.test.ts
@ -0,0 +1,49 @@
+import { describe, expectTypeOf, it } from 'vitest';
+
+import type { PipelineContext, PipelineContextMetadata } from '../types';
+
+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    customMetadata?: {
+      enabled: boolean;
+      source: 'test';
+    };
+  }
+}
+
+describe('PipelineContextMetadata', () => {
+  it('should keep built-in metadata fields strongly typed', () => {
+    expectTypeOf<PipelineContextMetadata['historySummary']>().toEqualTypeOf<
+      | {
+          formattedLength: number;
+          injected: boolean;
+          originalLength: number;
+        }
+      | undefined
+    >();
+    expectTypeOf<PipelineContextMetadata['toolMessageReorder']>().toEqualTypeOf<
+      | {
+          originalCount: number;
+          removedInvalidTools: number;
+          reorderedCount: number;
+        }
+      | undefined
+    >();
+  });
+
+  it('should support template literal injected-count metadata keys', () => {
+    expectTypeOf<PipelineContextMetadata['CustomProviderInjectedCount']>().toEqualTypeOf<
+      number | undefined
+    >();
+  });
+
+  it('should expose consumer-side metadata extensions through pipeline context', () => {
+    expectTypeOf<PipelineContext['metadata']['customMetadata']>().toEqualTypeOf<
+      | {
+          enabled: boolean;
+          source: 'test';
+        }
+      | undefined
+    >();
+  });
+});
--- a/packages/context-engine/src/tests/pipeline.test.ts
+++ b/packages/context-engine/src/tests/pipeline.test.ts
@ -176,9 +176,9 @@ describe('ContextEngine', () => {

      expect(result.isAborted).toBe(false);
      expect(result.messages).toEqual(input.messages);
-      expect(result.metadata.p1).toBe(true);
-      expect(result.metadata.p2).toBe(true);
-      expect(result.metadata.p3).toBe(true);
+      expect((result.metadata as any).p1).toBe(true);
+      expect((result.metadata as any).p2).toBe(true);
+      expect((result.metadata as any).p3).toBe(true);
      expect(result.stats.processedCount).toBe(3);
    });

--- a/packages/context-engine/src/base/tests/BaseProcessor.test.ts
+++ b/packages/context-engine/src/base/tests/BaseProcessor.test.ts
@ -185,14 +185,14 @@ describe('BaseProcessor', () => {
    it('should preserve all context properties', async () => {
      const processor = new TestProcessor();
      const context = createContext([{ content: 'test', role: 'user' }]);
-      context.metadata.customField = 'customValue';
+      (context.metadata as any).customField = 'customValue';

      const result = await processor.process(context);

      expect(result.isAborted).toBe(context.isAborted);
      expect(result.metadata.model).toBe(context.metadata.model);
      expect(result.metadata.maxTokens).toBe(context.metadata.maxTokens);
-      expect(result.metadata.customField).toBe('customValue');
+      expect((result.metadata as any).customField).toBe('customValue');
    });
  });

--- a/packages/context-engine/src/engine/messages/MessagesEngine.ts
+++ b/packages/context-engine/src/engine/messages/MessagesEngine.ts
@ -35,6 +35,7 @@ import {
  KnowledgeInjector,
  PageEditorContextInjector,
  PageSelectionsInjector,
+  SelectedSkillInjector,
  SkillContextProvider,
  SystemDateProvider,
  SystemRoleInjector,
@ -129,6 +130,7 @@ export class MessagesEngine {
      formatHistorySummary,
      knowledge,
      skillsConfig,
+      selectedSkills,
      toolDiscoveryConfig,
      toolsConfig,
      capabilities,
@ -157,6 +159,8 @@ export class MessagesEngine {
    const isGroupContextEnabled =
      isAgentGroupEnabled || !!agentGroup?.currentAgentId || !!agentGroup?.members;
    const isUserMemoryEnabled = userMemory?.enabled && userMemory?.memories;
+    const hasSelectedSkills = (selectedSkills?.length ?? 0) > 0;
+
    // Page editor is enabled if either direct pageContentContext or initialContext.pageEditor is provided
    const isPageEditorEnabled = !!pageContentContext || !!initialContext?.pageEditor;
    // GTD is enabled if gtd.enabled is true and either plan or todos is provided
@ -283,16 +287,19 @@ export class MessagesEngine {
        historySummary,
      }),

-      // 14. Page Selections injection (inject user-selected text into each user message that has them)
+      // 14. Selected skill injection (ephemeral user-selected slash skills for this request)
+      ...(hasSelectedSkills ? [new SelectedSkillInjector({ selectedSkills })] : []),
+
+      // 15. Page Selections injection (inject user-selected text into each user message that has them)
      new PageSelectionsInjector({ enabled: isPageEditorEnabled }),

-      // 15. Page Editor context injection (inject current page content to last user message)
+      // 16. Page Editor context injection (inject current page content to last user message)
      new PageEditorContextInjector({
        enabled: isPageEditorEnabled,
        // Use direct pageContentContext if provided (server-side), otherwise build from initialContext + stepContext (frontend)
-        pageContentContext: pageContentContext
-          ? pageContentContext
-          : initialContext?.pageEditor
+        pageContentContext:
+          pageContentContext ??
+          (initialContext?.pageEditor
            ? {
                markdown: initialContext.pageEditor.markdown,
                metadata: {
@ -303,10 +310,10 @@ export class MessagesEngine {
                // Use latest XML from stepContext if available, otherwise fallback to initial XML
                xml: stepContext?.stepPageEditor?.xml || initialContext.pageEditor.xml,
              }
-            : undefined,
+            : undefined),
      }),

-      // 16. GTD Todo injection (conditionally added, at end of last user message)
+      // 17. GTD Todo injection (conditionally added, at end of last user message)
      ...(isGTDTodoEnabled ? [new GTDTodoInjector({ enabled: true, todos: gtd.todos })] : []),

      // =============================================
--- a/packages/context-engine/src/engine/messages/types.ts
+++ b/packages/context-engine/src/engine/messages/types.ts
@ -1,6 +1,10 @@
 /* eslint-disable perfectionist/sort-interfaces */
 import type { FileContent, KnowledgeBaseInfo, PageContentContext } from '@lobechat/prompts';
-import type { RuntimeInitialContext, RuntimeStepContext } from '@lobechat/types';
+import type {
+  RuntimeInitialContext,
+  RuntimeSelectedSkill,
+  RuntimeStepContext,
+} from '@lobechat/types';

 import type { OpenAIChatMessage, UIChatMessage } from '@/types/index';

@ -15,6 +19,7 @@ import type { GTDPlan } from '../../providers/GTDPlanInjector';
 import type { GTDTodoList } from '../../providers/GTDTodoInjector';
 import type { SkillMeta } from '../../providers/SkillContextProvider';
 import type { ToolDiscoveryMeta } from '../../providers/ToolDiscoveryProvider';
+import type { PipelineContextMetadata } from '../../types';
 import type { LobeToolManifest } from '../tools/types';

 /**
@ -239,6 +244,8 @@ export interface MessagesEngineParams {
  // ========== Skills ==========
  /** Skills configuration */
  skillsConfig?: SkillsConfig;
+  /** Skills explicitly selected by the user for the current request */
+  selectedSkills?: RuntimeSelectedSkill[];

  // ========== Tool Discovery ==========
  /** Tool Discovery configuration (available tools for dynamic activation) */
@ -299,7 +306,7 @@ export interface MessagesEngineResult {
  /** Processed messages in OpenAI format */
  messages: OpenAIChatMessage[];
  /** Processing metadata */
-  metadata: Record<string, any>;
+  metadata: PipelineContextMetadata;
  /** Processing statistics */
  stats: {
    /** Number of processors executed */
--- a/packages/context-engine/src/processors/AgentCouncilFlatten.ts
+++ b/packages/context-engine/src/processors/AgentCouncilFlatten.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    agentCouncilAssistantMessagesCreated?: number;
+    agentCouncilFlattenProcessed?: number;
+    agentCouncilMessagesFlattened?: number;
+    agentCouncilToolMessagesCreated?: number;
+  }
+}
+
 const log = debug('context-engine:processor:AgentCouncilFlattenProcessor');

 /**
--- a/packages/context-engine/src/processors/CompressedGroupRoleTransform.ts
+++ b/packages/context-engine/src/processors/CompressedGroupRoleTransform.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { Message, PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    compressedGroupRoleTransformProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:CompressedGroupRoleTransformProcessor');

 /**
--- a/packages/context-engine/src/processors/GroupMessageFlatten.ts
+++ b/packages/context-engine/src/processors/GroupMessageFlatten.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    assistantMessagesCreated?: number;
+    groupMessagesFlattened?: number;
+    groupMessagesFlattenProcessed?: number;
+    toolMessagesCreated?: number;
+  }
+}
+
 const log = debug('context-engine:processor:GroupMessageFlattenProcessor');

 /**
--- a/packages/context-engine/src/processors/GroupOrchestrationFilter.ts
+++ b/packages/context-engine/src/processors/GroupOrchestrationFilter.ts
@ -3,6 +3,16 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { Message, PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    orchestrationFilterProcessed?: {
+      assistantFiltered: number;
+      filteredCount: number;
+      toolFiltered: number;
+    };
+  }
+}
+
 const log = debug('context-engine:processor:GroupOrchestrationFilterProcessor');

 /**
--- a/packages/context-engine/src/processors/GroupRoleTransform.ts
+++ b/packages/context-engine/src/processors/GroupRoleTransform.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { Message, PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    groupRoleTransformProcessed?: {
+      assistantTransformed: number;
+      toolTransformed: number;
+    };
+  }
+}
+
 const log = debug('context-engine:processor:GroupRoleTransformProcessor');

 /**
--- a/packages/context-engine/src/processors/HistoryTruncate.ts
+++ b/packages/context-engine/src/processors/HistoryTruncate.ts
@ -3,6 +3,13 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    finalMessageCount?: number;
+    historyTruncated?: number;
+  }
+}
+
 const log = debug('context-engine:processor:HistoryTruncateProcessor');

 export interface HistoryTruncateConfig {
@ -261,7 +268,11 @@ export const getSlicedMessages = (

  // Step 2: Walk backwards through messages to select last N groups
  const selectedGroupIndices = new Set<number>();
-  for (let i = messages.length - 1; i >= 0 && selectedGroupIndices.size < options.historyCount; i--) {
+  for (
+    let i = messages.length - 1;
+    i >= 0 && selectedGroupIndices.size < options.historyCount;
+    i--
+  ) {
    const msg = messages[i] as MinimalMessage;
    const groupIdx = messageToGroup.get(msg.id);
    if (groupIdx !== undefined) {
--- a/packages/context-engine/src/processors/InputTemplate.ts
+++ b/packages/context-engine/src/processors/InputTemplate.ts
@ -4,6 +4,12 @@ import { template } from 'es-toolkit/compat';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    inputTemplateProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:InputTemplateProcessor');

 export interface InputTemplateConfig {
@ -39,7 +45,7 @@ export class InputTemplateProcessor extends BaseProcessor {
    try {
      // Compile the template
      const compiler = template(this.config.inputTemplate, {
-        interpolate: /{{\s*(text)\s*}}/g,
+        interpolate: /\{\{\s*(text)\s*\}\}/g,
      });

      log(`Applying input template: ${this.config.inputTemplate}`);
--- a/packages/context-engine/src/processors/MessageCleanup.ts
+++ b/packages/context-engine/src/processors/MessageCleanup.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    messageCleanup?: {
+      cleanedCount: number;
+      totalMessages: number;
+    };
+  }
+}
+
 const log = debug('context-engine:processor:MessageCleanupProcessor');

 /**
--- a/packages/context-engine/src/processors/MessageContent.ts
+++ b/packages/context-engine/src/processors/MessageContent.ts
@ -8,6 +8,14 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    assistantMessagesProcessed?: number;
+    messageContentProcessed?: number;
+    userMessagesProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:MessageContentProcessor');

 /**
--- a/packages/context-engine/src/processors/PlaceholderVariables.ts
+++ b/packages/context-engine/src/processors/PlaceholderVariables.ts
@ -3,9 +3,23 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    placeholderVariablesProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:PlaceholderVariablesProcessor');

-const placeholderVariablesRegex = /{{(.*?)}}/g;
+const PLACEHOLDER_START = '{{';
+const PLACEHOLDER_END = '}}';
+
+interface PlaceholderToken {
+  end: number;
+  key: string;
+  raw: string;
+  start: number;
+}

 export type PlaceholderValue = unknown | (() => unknown);
 export type PlaceholderValueMap = Record<string, PlaceholderValue>;
@ -63,9 +77,56 @@ export interface PlaceholderVariablesConfig {
 * @param text String containing template variables
 * @returns Array of variable names, e.g. ['date', 'nickname']
 */
-const extractPlaceholderVariables = (text: string): string[] => {
-  const matches = [...text.matchAll(placeholderVariablesRegex)];
-  return matches.map((m) => m[1].trim());
+const extractPlaceholderTokens = (text: string): PlaceholderToken[] => {
+  const tokens: PlaceholderToken[] = [];
+  let searchIndex = 0;
+
+  while (searchIndex < text.length) {
+    const start = text.indexOf(PLACEHOLDER_START, searchIndex);
+    if (start === -1) break;
+
+    const end = text.indexOf(PLACEHOLDER_END, start + PLACEHOLDER_START.length);
+    if (end === -1) break;
+
+    const tokenEnd = end + PLACEHOLDER_END.length;
+    tokens.push({
+      end: tokenEnd,
+      key: text.slice(start + PLACEHOLDER_START.length, end).trim(),
+      raw: text.slice(start, tokenEnd),
+      start,
+    });
+
+    searchIndex = tokenEnd;
+  }
+
+  return tokens;
+};
+
+const replaceAvailablePlaceholders = (
+  text: string,
+  placeholders: PlaceholderToken[],
+  availableVariables: Record<string, string>,
+): string => {
+  const output: string[] = [];
+  let cursor = 0;
+  let changed = false;
+
+  for (const placeholder of placeholders) {
+    output.push(text.slice(cursor, placeholder.start));
+
+    if (Object.hasOwn(availableVariables, placeholder.key)) {
+      output.push(availableVariables[placeholder.key]);
+      changed = true;
+    } else {
+      output.push(placeholder.raw);
+    }
+
+    cursor = placeholder.end;
+  }
+
+  output.push(text.slice(cursor));
+
+  return changed ? output.join('') : text;
 };

 /**
@ -85,14 +146,17 @@ export const parsePlaceholderVariables = (
  // Recursive parsing to handle cases like {{text}} containing additional preset variables
  for (let i = 0; i < depth; i++) {
    try {
-      const extractedVariables = extractPlaceholderVariables(result);
+      const placeholders = extractPlaceholderTokens(result);
+      const extractedVariables = placeholders.map((placeholder) => placeholder.key);
+
+      if (placeholders.length === 0) break;

      log('Extracted variables from text: %o', extractedVariables);
      log('Available generator keys: %o', Object.keys(variableGenerators));

      // Debug: check if text contains {{username}} pattern
      if (result.includes('username') || result.includes('{{')) {
-        const matches = result.match(/{{[^}]*}}/g);
+        const matches = placeholders.map((placeholder) => placeholder.raw);
        log('All {{...}} patterns found in text: %o', matches);
      }

@ -112,16 +176,7 @@ export const parsePlaceholderVariables = (
      // Only perform replacement when there are available variables
      if (Object.keys(availableVariables).length === 0) break;

-      // Replace variables one by one to avoid es-toolkit template's error handling for undefined variables
-      let tempResult = result;
-      for (const [key, value] of Object.entries(availableVariables)) {
-        const regex = new RegExp(
-          `{{\\s*${key.replaceAll(/[$()*+.?[\\\]^{|}]/g, '\\$&')}\\s*}}`,
-          'g',
-        );
-        // @ts-ignore
-        tempResult = tempResult.replace(regex, value);
-      }
+      const tempResult = replaceAvailablePlaceholders(result, placeholders, availableVariables);

      if (tempResult === result) break;
      result = tempResult;
--- a/packages/context-engine/src/processors/ReactionFeedback.ts
+++ b/packages/context-engine/src/processors/ReactionFeedback.ts
@ -4,6 +4,12 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    reactionFeedbackProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:ReactionFeedbackProcessor');

 export interface ReactionFeedbackConfig {
--- a/packages/context-engine/src/processors/SupervisorRoleRestore.ts
+++ b/packages/context-engine/src/processors/SupervisorRoleRestore.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { Message, PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    supervisorRoleRestoreProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:SupervisorRoleRestoreProcessor');

 /**
--- a/packages/context-engine/src/processors/TaskMessage.ts
+++ b/packages/context-engine/src/processors/TaskMessage.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    taskMessagesProcessed?: number;
+  }
+}
+
 const log = debug('context-engine:processor:TaskMessageProcessor');

 /**
--- a/packages/context-engine/src/processors/TasksFlatten.ts
+++ b/packages/context-engine/src/processors/TasksFlatten.ts
@ -3,6 +3,14 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    taskMessagesCreated?: number;
+    tasksFlattenProcessed?: number;
+    tasksMessagesFlattened?: number;
+  }
+}
+
 const log = debug('context-engine:processor:TasksFlattenProcessor');

 /**
--- a/packages/context-engine/src/processors/ToolCall.ts
+++ b/packages/context-engine/src/processors/ToolCall.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { MessageToolCall, PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    supportTools?: boolean;
+    toolCallProcessed?: number;
+    toolCallsConverted?: number;
+    toolMessagesConverted?: number;
+  }
+}
+
 const log = debug('context-engine:processor:ToolCallProcessor');

 export interface ToolCallConfig {
--- a/packages/context-engine/src/processors/ToolMessageReorder.ts
+++ b/packages/context-engine/src/processors/ToolMessageReorder.ts
@ -3,6 +3,16 @@ import debug from 'debug';
 import { BaseProcessor } from '../base/BaseProcessor';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    toolMessageReorder?: {
+      originalCount: number;
+      removedInvalidTools: number;
+      reorderedCount: number;
+    };
+  }
+}
+
 const log = debug('context-engine:processor:ToolMessageReorder');

 /**
--- a/packages/context-engine/src/processors/tests/MessageCleanup.test.ts
+++ b/packages/context-engine/src/processors/tests/MessageCleanup.test.ts
@ -301,8 +301,8 @@ describe('MessageCleanupProcessor', () => {
      const result = await processor.process(context);

      // Both messages are "cleaned" because comparison is done by reference
-      expect(result.metadata.messageCleanup.cleanedCount).toBe(2);
-      expect(result.metadata.messageCleanup.totalMessages).toBe(2);
+      expect(result.metadata.messageCleanup!.cleanedCount).toBe(2);
+      expect(result.metadata.messageCleanup!.totalMessages).toBe(2);
    });

    it('should handle empty messages array', async () => {
--- a/packages/context-engine/src/processors/tests/PlaceholderVariables.test.ts
+++ b/packages/context-engine/src/processors/tests/PlaceholderVariables.test.ts
@ -53,6 +53,18 @@ describe('PlaceholderVariablesProcessor', () => {
      const result = parsePlaceholderVariables(text, mockVariableGenerators);
      expect(result).toBe('No placeholders here');
    });
+
+    it('should replace placeholders with surrounding whitespace', () => {
+      const text = 'Hello {{ username }}, today is {{ date }}';
+      const result = parsePlaceholderVariables(text, mockVariableGenerators);
+      expect(result).toBe('Hello TestUser, today is 2023-12-25');
+    });
+
+    it('should handle malformed repeated opening braces without backtracking issues', () => {
+      const text = '{{{{'.repeat(2000);
+      const result = parsePlaceholderVariables(text, mockVariableGenerators);
+      expect(result).toBe(text);
+    });
  });

  describe('parsePlaceholderVariablesMessages', () => {
--- a/packages/context-engine/src/providers/AgentBuilderContextInjector.ts
+++ b/packages/context-engine/src/providers/AgentBuilderContextInjector.ts
@ -1,21 +1,16 @@
+import { escapeXml } from '@lobechat/prompts';
 import debug from 'debug';

 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

-const log = debug('context-engine:provider:AgentBuilderContextInjector');
+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    agentBuilderContextInjected?: boolean;
+  }
+}

-/**
- * Escape XML special characters
- */
-const escapeXml = (str: string): string => {
-  return str
-    .replaceAll('&', '&amp;')
-    .replaceAll('<', '&lt;')
-    .replaceAll('>', '&gt;')
-    .replaceAll('"', '&quot;')
-    .replaceAll("'", '&apos;');
-};
+const log = debug('context-engine:provider:AgentBuilderContextInjector');

 /**
 * Official tool item for Agent Builder context
--- a/packages/context-engine/src/providers/AgentManagementContextInjector.ts
+++ b/packages/context-engine/src/providers/AgentManagementContextInjector.ts
@ -1,21 +1,17 @@
+import { escapeXml } from '@lobechat/prompts';
+import type { RuntimeMentionedAgent } from '@lobechat/types';
 import debug from 'debug';

 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

-const log = debug('context-engine:provider:AgentManagementContextInjector');
+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    agentManagementContextInjected?: boolean;
+  }
+}

-/**
- * Escape XML special characters
- */
-const escapeXml = (str: string): string => {
-  return str
-    .replaceAll('&', '&amp;')
-    .replaceAll('<', '&lt;')
-    .replaceAll('>', '&gt;')
-    .replaceAll('"', '&quot;')
-    .replaceAll("'", '&apos;');
-};
+const log = debug('context-engine:provider:AgentManagementContextInjector');

 /**
 * Available model info for Agent Management context
@ -70,6 +66,8 @@ export interface AgentManagementContext {
  availablePlugins?: AvailablePluginInfo[];
  /** Available providers and models */
  availableProviders?: AvailableProviderInfo[];
+  /** Agents @mentioned by the user — supervisor should delegate to these via callAgent */
+  mentionedAgents?: RuntimeMentionedAgent[];
 }

 export interface AgentManagementContextInjectorConfig {
@ -166,6 +164,21 @@ ${parts.join('\n')}
 </agent_management_context>`;
 };

+/**
+ * Format mentioned agents as delegation context for injection after the user message.
+ * Instructs the AI to delegate to the mentioned agent(s) via callAgent.
+ */
+const formatMentionedAgentsContext = (mentionedAgents: RuntimeMentionedAgent[]): string => {
+  const agentsXml = mentionedAgents
+    .map((a) => `  <agent id="${escapeXml(a.id)}" name="${escapeXml(a.name)}" />`)
+    .join('\n');
+
+  return `<mentioned_agents>
+<instruction>The user has @mentioned the following agent(s) in their message. You MUST use the callAgent tool to delegate the user's request to the mentioned agent. Do NOT attempt to handle the request yourself — call the agent and let them respond.</instruction>
+${agentsXml}
+</mentioned_agents>`;
+};
+
 /**
 * Agent Management Context Injector
 * Responsible for injecting available models and plugins when Agent Management tool is enabled
@ -195,41 +208,70 @@ export class AgentManagementContextInjector extends BaseProvider {
      return this.markAsExecuted(clonedContext);
    }

-    // Format context
+    const hasMentionedAgents =
+      this.config.context.mentionedAgents && this.config.context.mentionedAgents.length > 0;
+
+    // Format context (excluding mentionedAgents — those are injected separately after the last user message)
+    const contextWithoutMentions: AgentManagementContext = hasMentionedAgents
+      ? {
+          availablePlugins: this.config.context.availablePlugins,
+          availableProviders: this.config.context.availableProviders,
+        }
+      : this.config.context;
+
    const formatFn = this.config.formatContext || defaultFormatContext;
-    const formattedContent = formatFn(this.config.context);
+    const formattedContent = formatFn(contextWithoutMentions);

-    // Skip if no content to inject
-    if (!formattedContent) {
-      log('No content to inject after formatting');
-      return this.markAsExecuted(clonedContext);
+    // Inject agent-management context (providers/plugins) before the first user message
+    if (formattedContent) {
+      const firstUserIndex = clonedContext.messages.findIndex((msg) => msg.role === 'user');
+
+      if (firstUserIndex !== -1) {
+        const contextMessage = {
+          content: formattedContent,
+          createdAt: Date.now(),
+          id: `agent-management-context-${Date.now()}`,
+          meta: { injectType: 'agent-management-context', systemInjection: true },
+          role: 'user' as const,
+          updatedAt: Date.now(),
+        };
+
+        clonedContext.messages.splice(firstUserIndex, 0, contextMessage);
+        clonedContext.metadata.agentManagementContextInjected = true;
+        log('Agent Management context injected before first user message');
+      }
    }

-    // Find the first user message index
-    const firstUserIndex = clonedContext.messages.findIndex((msg) => msg.role === 'user');
+    // Inject mentionedAgents delegation context AFTER the last user message
+    // This position makes the delegation instruction most salient to the model
+    if (hasMentionedAgents) {
+      const mentionedContent = formatMentionedAgentsContext(this.config.context.mentionedAgents!);

-    if (firstUserIndex === -1) {
-      log('No user messages found, skipping injection');
-      return this.markAsExecuted(clonedContext);
+      // Find the last user message index
+      let lastUserIndex = -1;
+      for (let i = clonedContext.messages.length - 1; i >= 0; i--) {
+        if (clonedContext.messages[i].role === 'user') {
+          lastUserIndex = i;
+          break;
+        }
+      }
+
+      if (lastUserIndex !== -1) {
+        const mentionMessage = {
+          content: mentionedContent,
+          createdAt: Date.now(),
+          id: `agent-mention-delegation-${Date.now()}`,
+          meta: { injectType: 'agent-mention-delegation', systemInjection: true },
+          role: 'user' as const,
+          updatedAt: Date.now(),
+        };
+
+        // Insert after the last user message
+        clonedContext.messages.splice(lastUserIndex + 1, 0, mentionMessage);
+        log('Mentioned agents delegation context injected after last user message');
+      }
    }

-    // Insert a new user message with context before the first user message
-    const contextMessage = {
-      content: formattedContent,
-      createdAt: Date.now(),
-      id: `agent-management-context-${Date.now()}`,
-      meta: { injectType: 'agent-management-context', systemInjection: true },
-      role: 'user' as const,
-      updatedAt: Date.now(),
-    };
-
-    clonedContext.messages.splice(firstUserIndex, 0, contextMessage);
-
-    // Update metadata
-    clonedContext.metadata.agentManagementContextInjected = true;
-
-    log('Agent Management context injected as new user message');
-
    return this.markAsExecuted(clonedContext);
  }
 }
--- a/packages/context-engine/src/providers/EvalContextSystemInjector.ts
+++ b/packages/context-engine/src/providers/EvalContextSystemInjector.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    evalContextInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:EvalContextSystemInjector');

 export interface EvalContext {
--- a/packages/context-engine/src/providers/ForceFinishSummaryInjector.ts
+++ b/packages/context-engine/src/providers/ForceFinishSummaryInjector.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    forceFinishInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:ForceFinishSummaryInjector');

 export interface ForceFinishSummaryInjectorConfig {
--- a/packages/context-engine/src/providers/GTDPlanInjector.ts
+++ b/packages/context-engine/src/providers/GTDPlanInjector.ts
@ -3,6 +3,13 @@ import debug from 'debug';
 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    gtdPlanId?: string;
+    gtdPlanInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:GTDPlanInjector');

 /**
--- a/packages/context-engine/src/providers/GTDTodoInjector.ts
+++ b/packages/context-engine/src/providers/GTDTodoInjector.ts
@ -3,6 +3,15 @@ import debug from 'debug';
 import { BaseLastUserContentProvider } from '../base/BaseLastUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    gtdTodoCompletedCount?: number;
+    gtdTodoCount?: number;
+    gtdTodoInjected?: boolean;
+    gtdTodoProcessingCount?: number;
+  }
+}
+
 const log = debug('context-engine:provider:GTDTodoInjector');

 /** Status of a todo item */
--- a/packages/context-engine/src/providers/GroupAgentBuilderContextInjector.ts
+++ b/packages/context-engine/src/providers/GroupAgentBuilderContextInjector.ts
@ -1,21 +1,16 @@
+import { escapeXml } from '@lobechat/prompts';
 import debug from 'debug';

 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

-const log = debug('context-engine:provider:GroupAgentBuilderContextInjector');
+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    groupAgentBuilderContextInjected?: boolean;
+  }
+}

-/**
- * Escape XML special characters
- */
-const escapeXml = (str: string): string => {
-  return str
-    .replaceAll('&', '&amp;')
-    .replaceAll('<', '&lt;')
-    .replaceAll('>', '&gt;')
-    .replaceAll('"', '&quot;')
-    .replaceAll("'", '&apos;');
-};
+const log = debug('context-engine:provider:GroupAgentBuilderContextInjector');

 /**
 * Group member info for Group Agent Builder context
--- a/packages/context-engine/src/providers/GroupContextInjector.ts
+++ b/packages/context-engine/src/providers/GroupContextInjector.ts
@ -5,6 +5,12 @@ import debug from 'debug';
 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    groupContextInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:GroupContextInjector');

 /**
--- a/packages/context-engine/src/providers/HistorySummary.ts
+++ b/packages/context-engine/src/providers/HistorySummary.ts
@ -3,6 +3,16 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    historySummary?: {
+      formattedLength: number;
+      injected: boolean;
+      originalLength: number;
+    };
+  }
+}
+
 const log = debug('context-engine:provider:HistorySummaryProvider');

 /**
--- a/packages/context-engine/src/providers/KnowledgeInjector.ts
+++ b/packages/context-engine/src/providers/KnowledgeInjector.ts
@ -5,6 +5,14 @@ import debug from 'debug';
 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    filesCount?: number;
+    knowledgeBasesCount?: number;
+    knowledgeInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:KnowledgeInjector');

 export interface KnowledgeInjectorConfig {
--- a/packages/context-engine/src/providers/PageEditorContextInjector.ts
+++ b/packages/context-engine/src/providers/PageEditorContextInjector.ts
@ -5,6 +5,12 @@ import debug from 'debug';
 import { BaseLastUserContentProvider } from '../base/BaseLastUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    pageEditorContextInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:PageEditorContextInjector');

 export interface PageEditorContextInjectorConfig {
--- a/packages/context-engine/src/providers/SelectedSkillInjector.ts
+++ b/packages/context-engine/src/providers/SelectedSkillInjector.ts
@ -0,0 +1,92 @@
+import { escapeXml } from '@lobechat/prompts';
+import type { RuntimeSelectedSkill } from '@lobechat/types';
+import debug from 'debug';
+
+import { BaseLastUserContentProvider } from '../base/BaseLastUserContentProvider';
+import type { PipelineContext, ProcessorOptions } from '../types';
+
+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    selectedSkillContext?: {
+      injected: boolean;
+      skillsCount: number;
+    };
+  }
+}
+
+const log = debug('context-engine:provider:SelectedSkillInjector');
+
+export interface SelectedSkillInjectorConfig {
+  selectedSkills?: RuntimeSelectedSkill[];
+}
+
+const formatSelectedSkills = (selectedSkills: RuntimeSelectedSkill[]): string | null => {
+  if (selectedSkills.length === 0) return null;
+
+  const lines = [
+    'The user explicitly selected these skills for this request. Prefer them when relevant.',
+    '<selected_skills>',
+    ...selectedSkills.map(
+      (skill) =>
+        `  <skill identifier="${escapeXml(skill.identifier)}" name="${escapeXml(skill.name)}" />`,
+    ),
+    '</selected_skills>',
+  ];
+
+  return lines.join('\n');
+};
+
+/**
+ * Selected Skill Injector
+ * Appends user-selected slash-menu skills to the last user message as ephemeral context.
+ */
+export class SelectedSkillInjector extends BaseLastUserContentProvider {
+  readonly name = 'SelectedSkillInjector';
+
+  constructor(
+    private config: SelectedSkillInjectorConfig,
+    options: ProcessorOptions = {},
+  ) {
+    super(options);
+  }
+
+  protected async doProcess(context: PipelineContext): Promise<PipelineContext> {
+    const clonedContext = this.cloneContext(context);
+    const selectedSkills = this.config.selectedSkills ?? [];
+
+    if (selectedSkills.length === 0) {
+      log('No selected skills, skipping injection');
+      return this.markAsExecuted(clonedContext);
+    }
+
+    const content = formatSelectedSkills(selectedSkills);
+
+    if (!content) {
+      log('No selected skill content generated, skipping injection');
+      return this.markAsExecuted(clonedContext);
+    }
+
+    const lastUserIndex = this.findLastUserMessageIndex(clonedContext.messages);
+
+    if (lastUserIndex === -1) {
+      log('No user messages found, skipping injection');
+      return this.markAsExecuted(clonedContext);
+    }
+
+    const hasExistingWrapper = this.hasExistingSystemContext(clonedContext);
+    const contentToAppend = hasExistingWrapper
+      ? this.createContextBlock(content, 'selected_skill_context')
+      : this.wrapWithSystemContext(content, 'selected_skill_context');
+
+    this.appendToLastUserMessage(clonedContext, contentToAppend);
+
+    clonedContext.metadata.selectedSkillContext = {
+      injected: true,
+      skillsCount: selectedSkills.length,
+    };
+
+    log('Selected skill context appended, skills count: %d', selectedSkills.length);
+
+    return this.markAsExecuted(clonedContext);
+  }
+}
--- a/packages/context-engine/src/providers/SkillContextProvider.ts
+++ b/packages/context-engine/src/providers/SkillContextProvider.ts
@ -4,6 +4,15 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    skillContext?: {
+      injected: boolean;
+      skillsCount: number;
+    };
+  }
+}
+
 const log = debug('context-engine:provider:SkillContextProvider');

 /**
--- a/packages/context-engine/src/providers/SystemDateProvider.ts
+++ b/packages/context-engine/src/providers/SystemDateProvider.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    systemDateInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:SystemDateProvider');

 export interface SystemDateProviderConfig {
--- a/packages/context-engine/src/providers/SystemRoleInjector.ts
+++ b/packages/context-engine/src/providers/SystemRoleInjector.ts
@ -3,6 +3,12 @@ import debug from 'debug';
 import { BaseProvider } from '../base/BaseProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    systemRoleInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:SystemRoleInjector');

 export interface SystemRoleInjectorConfig {
--- a/packages/context-engine/src/providers/ToolDiscoveryProvider.ts
+++ b/packages/context-engine/src/providers/ToolDiscoveryProvider.ts
@ -4,6 +4,15 @@ import debug from 'debug';
 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    toolDiscoveryContext?: {
+      injected: boolean;
+      toolsCount: number;
+    };
+  }
+}
+
 const log = debug('context-engine:provider:ToolDiscoveryProvider');

 export interface ToolDiscoveryMeta {
--- a/packages/context-engine/src/providers/ToolSystemRole.ts
+++ b/packages/context-engine/src/providers/ToolSystemRole.ts
@ -7,6 +7,17 @@ import { ToolNameResolver } from '../engine/tools';
 import type { LobeToolManifest } from '../engine/tools/types';
 import type { PipelineContext, ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    toolSystemRole?: {
+      contentLength: number;
+      injected: boolean;
+      supportsFunctionCall: boolean;
+      toolsCount: number;
+    };
+  }
+}
+
 const log = debug('context-engine:provider:ToolSystemRoleProvider');

 /**
@ -58,7 +69,7 @@ export class ToolSystemRoleProvider extends BaseProvider {
    clonedContext.metadata.toolSystemRole = {
      contentLength: toolSystemRole.length,
      injected: true,
-      supportsFunctionCall: this.config.isCanUseFC(this.config.model, this.config.provider),
+      supportsFunctionCall: !!this.config.isCanUseFC(this.config.model, this.config.provider),
      toolsCount: this.config.manifests.length,
    };

--- a/packages/context-engine/src/providers/UserMemoryInjector.ts
+++ b/packages/context-engine/src/providers/UserMemoryInjector.ts
@ -5,6 +5,12 @@ import debug from 'debug';
 import { BaseFirstUserContentProvider } from '../base/BaseFirstUserContentProvider';
 import { type PipelineContext, type ProcessorOptions } from '../types';

+declare module '../types' {
+  interface PipelineContextMetadataOverrides {
+    userMemoryInjected?: boolean;
+  }
+}
+
 const log = debug('context-engine:provider:UserMemoryInjector');

 export interface UserMemoryInjectorConfig {
--- a/packages/context-engine/src/providers/tests/AgentManagementContextInjector.test.ts
+++ b/packages/context-engine/src/providers/tests/AgentManagementContextInjector.test.ts
@ -0,0 +1,205 @@
+import { describe, expect, it } from 'vitest';
+
+import type { PipelineContext } from '../../types';
+import { AgentManagementContextInjector } from '../AgentManagementContextInjector';
+
+describe('AgentManagementContextInjector', () => {
+  const createContext = (messages: any[]): PipelineContext => ({
+    initialState: { messages: [] },
+    isAborted: false,
+    messages,
+    metadata: {},
+  });
+
+  describe('disabled / no context', () => {
+    it('should skip when disabled', async () => {
+      const injector = new AgentManagementContextInjector({ enabled: false });
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'hi' },
+      ]);
+      const result = await injector.process(ctx);
+      expect(result.messages).toHaveLength(2);
+    });
+
+    it('should skip when no context provided', async () => {
+      const injector = new AgentManagementContextInjector({ enabled: true });
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'hi' },
+      ]);
+      const result = await injector.process(ctx);
+      expect(result.messages).toHaveLength(2);
+    });
+  });
+
+  describe('agent-management context (providers/plugins)', () => {
+    it('should inject before the first user message', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          availableProviders: [
+            {
+              id: 'openai',
+              name: 'OpenAI',
+              models: [{ id: 'gpt-4', name: 'GPT-4' }],
+            },
+          ],
+        },
+      });
+
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'create an agent' },
+      ]);
+      const result = await injector.process(ctx);
+
+      expect(result.messages).toHaveLength(3);
+      expect(result.messages[0].role).toBe('system');
+      // Injected context before user message
+      expect(result.messages[1].role).toBe('user');
+      expect(result.messages[1].content).toContain('<agent_management_context>');
+      expect(result.messages[1].content).toContain('gpt-4');
+      // Original user message
+      expect(result.messages[2].content).toBe('create an agent');
+      expect(result.metadata.agentManagementContextInjected).toBe(true);
+    });
+  });
+
+  describe('mentionedAgents delegation', () => {
+    it('should inject delegation context after the last user message', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          mentionedAgents: [{ id: 'agt_designer', name: 'Designer Agent' }],
+        },
+      });
+
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'Let @Designer Agent help me' },
+      ]);
+      const result = await injector.process(ctx);
+
+      // system + user + injected delegation
+      expect(result.messages).toHaveLength(3);
+      expect(result.messages[1].content).toBe('Let @Designer Agent help me');
+
+      const delegationMsg = result.messages[2];
+      expect(delegationMsg.role).toBe('user');
+      expect(delegationMsg.content).toContain('<mentioned_agents>');
+      expect(delegationMsg.content).toContain('agt_designer');
+      expect(delegationMsg.content).toContain('Designer Agent');
+      expect(delegationMsg.content).toContain('MUST use the callAgent tool');
+      expect(delegationMsg.meta.injectType).toBe('agent-mention-delegation');
+    });
+
+    it('should inject after the LAST user message, not the first', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          mentionedAgents: [{ id: 'agt_1', name: 'Agent A' }],
+        },
+      });
+
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'first message' },
+        { role: 'assistant', content: 'reply' },
+        { role: 'user', content: 'Let @Agent A do this' },
+      ]);
+      const result = await injector.process(ctx);
+
+      // system + user + assistant + user + injected
+      expect(result.messages).toHaveLength(5);
+      expect(result.messages[3].content).toBe('Let @Agent A do this');
+      expect(result.messages[4].content).toContain('<mentioned_agents>');
+      expect(result.messages[4].content).toContain('agt_1');
+    });
+
+    it('should handle multiple mentioned agents', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          mentionedAgents: [
+            { id: 'agt_1', name: 'Agent A' },
+            { id: 'agt_2', name: 'Agent B' },
+          ],
+        },
+      });
+
+      const ctx = createContext([{ role: 'user', content: 'hello' }]);
+      const result = await injector.process(ctx);
+
+      const delegationMsg = result.messages[1];
+      expect(delegationMsg.content).toContain('agt_1');
+      expect(delegationMsg.content).toContain('agt_2');
+      expect(delegationMsg.content).toContain('Agent A');
+      expect(delegationMsg.content).toContain('Agent B');
+    });
+  });
+
+  describe('combined: agent-management + mentionedAgents', () => {
+    it('should inject providers before first user and delegation after last user', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          availableProviders: [
+            {
+              id: 'anthropic',
+              name: 'Anthropic',
+              models: [{ id: 'claude-sonnet-4-5-20250514', name: 'Claude Sonnet' }],
+            },
+          ],
+          mentionedAgents: [{ id: 'agt_dev', name: 'Developer' }],
+        },
+      });
+
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'Let @Developer build this' },
+      ]);
+      const result = await injector.process(ctx);
+
+      // system + management_context + user + delegation
+      expect(result.messages).toHaveLength(4);
+
+      // Management context before first user
+      expect(result.messages[1].content).toContain('<agent_management_context>');
+      expect(result.messages[1].content).toContain('claude-sonnet-4-5-20250514');
+      // Management context should NOT contain mentionedAgents
+      expect(result.messages[1].content).not.toContain('<mentioned_agents>');
+
+      // Original user message
+      expect(result.messages[2].content).toBe('Let @Developer build this');
+
+      // Delegation after last user
+      expect(result.messages[3].content).toContain('<mentioned_agents>');
+      expect(result.messages[3].content).toContain('agt_dev');
+    });
+  });
+
+  describe('only mentionedAgents (no providers/plugins)', () => {
+    it('should NOT inject empty agent-management context but SHOULD inject delegation', async () => {
+      const injector = new AgentManagementContextInjector({
+        enabled: true,
+        context: {
+          // No providers, no plugins — only mentionedAgents
+          mentionedAgents: [{ id: 'agt_x', name: 'Agent X' }],
+        },
+      });
+
+      const ctx = createContext([
+        { role: 'system', content: 'sys' },
+        { role: 'user', content: 'Ask @Agent X' },
+      ]);
+      const result = await injector.process(ctx);
+
+      // system + user + delegation (no empty management context)
+      expect(result.messages).toHaveLength(3);
+      expect(result.messages[1].content).toBe('Ask @Agent X');
+      expect(result.messages[2].content).toContain('<mentioned_agents>');
+      expect(result.messages[2].content).toContain('agt_x');
+    });
+  });
+});
--- a/packages/context-engine/src/providers/tests/SelectedSkillInjector.test.ts
+++ b/packages/context-engine/src/providers/tests/SelectedSkillInjector.test.ts
@ -0,0 +1,76 @@
+import { describe, expect, it } from 'vitest';
+
+import type { PipelineContext } from '../../types';
+import { SelectedSkillInjector } from '../SelectedSkillInjector';
+
+const createContext = (messages: any[] = []): PipelineContext => ({
+  initialState: {
+    messages: [],
+    model: 'gpt-4',
+    provider: 'openai',
+  },
+  isAborted: false,
+  messages,
+  metadata: {
+    maxTokens: 4096,
+    model: 'gpt-4',
+  },
+});
+
+describe('SelectedSkillInjector', () => {
+  it('should append selected skills to the last user message', async () => {
+    const provider = new SelectedSkillInjector({
+      selectedSkills: [
+        { identifier: 'user_memory', name: 'User Memory' },
+        { identifier: 'instruction', name: 'Instruction' },
+      ],
+    });
+
+    const context = createContext([
+      { content: 'Earlier question', id: 'user-1', role: 'user' },
+      { content: 'Assistant reply', id: 'assistant-1', role: 'assistant' },
+      { content: 'Current request', id: 'user-2', role: 'user' },
+    ]);
+
+    const result = await provider.process(context);
+
+    expect(result.messages).toHaveLength(3);
+    expect(result.messages[2].content).toContain('Current request');
+    expect(result.messages[2].content).toContain('<selected_skill_context>');
+    expect(result.messages[2].content).toContain('<selected_skills>');
+    expect(result.messages[2].content).toContain(
+      '<skill identifier="user_memory" name="User Memory" />',
+    );
+    expect(result.metadata.selectedSkillContext).toEqual({
+      injected: true,
+      skillsCount: 2,
+    });
+  });
+
+  it('should reuse existing system context wrapper on the last user message', async () => {
+    const provider = new SelectedSkillInjector({
+      selectedSkills: [{ identifier: 'user_memory', name: 'User Memory' }],
+    });
+
+    const context = createContext([
+      {
+        content: `Current request
+
+<!-- SYSTEM CONTEXT (NOT PART OF USER QUERY) -->
+<current_page_context>
+<page>draft</page>
+</current_page_context>
+<!-- END SYSTEM CONTEXT -->`,
+        id: 'user-1',
+        role: 'user',
+      },
+    ]);
+
+    const result = await provider.process(context);
+    const content = result.messages[0].content as string;
+
+    expect(content.match(/<!-- SYSTEM CONTEXT \(NOT PART OF USER QUERY\) -->/g)).toHaveLength(1);
+    expect(content).toContain('<current_page_context>');
+    expect(content).toContain('<selected_skill_context>');
+  });
+});
--- a/packages/context-engine/src/providers/tests/ToolSystemRoleProvider.test.ts
+++ b/packages/context-engine/src/providers/tests/ToolSystemRoleProvider.test.ts
@ -44,8 +44,8 @@ describe('ToolSystemRoleProvider', () => {

    // Should update metadata
    expect(result.metadata.toolSystemRole).toBeDefined();
-    expect(result.metadata.toolSystemRole.injected).toBe(true);
-    expect(result.metadata.toolSystemRole.supportsFunctionCall).toBe(true);
+    expect(result.metadata.toolSystemRole!.injected).toBe(true);
+    expect(result.metadata.toolSystemRole!.supportsFunctionCall).toBe(true);
  });

  it('should merge tool system role with existing system message', async () => {
--- a/packages/context-engine/src/providers/index.ts
+++ b/packages/context-engine/src/providers/index.ts
@ -12,6 +12,7 @@ export { HistorySummaryProvider } from './HistorySummary';
 export { KnowledgeInjector } from './KnowledgeInjector';
 export { PageEditorContextInjector } from './PageEditorContextInjector';
 export { PageSelectionsInjector } from './PageSelectionsInjector';
+export { SelectedSkillInjector } from './SelectedSkillInjector';
 export { SkillContextProvider } from './SkillContextProvider';
 export { SystemDateProvider } from './SystemDateProvider';
 export { SystemRoleInjector } from './SystemRoleInjector';
@ -51,6 +52,7 @@ export type { HistorySummaryConfig } from './HistorySummary';
 export type { KnowledgeInjectorConfig } from './KnowledgeInjector';
 export type { PageEditorContextInjectorConfig } from './PageEditorContextInjector';
 export type { PageSelectionsInjectorConfig } from './PageSelectionsInjector';
+export type { SelectedSkillInjectorConfig } from './SelectedSkillInjector';
 export type { SkillContextProviderConfig, SkillMeta } from './SkillContextProvider';
 export type { SystemDateProviderConfig } from './SystemDateProvider';
 export type { SystemRoleInjectorConfig } from './SystemRoleInjector';
--- a/packages/context-engine/src/types.ts
+++ b/packages/context-engine/src/types.ts
@ -1,5 +1,17 @@
 import type { UIChatMessage } from '@lobechat/types';

+/**
+ * Consumer-side metadata extensions for PipelineContext.metadata.
+ *
+ * Example:
+ * declare module '@lobechat/context-engine' {
+ *   interface PipelineContextMetadataOverrides {
+ *     myCustomFlag?: boolean;
+ *   }
+ * }
+ */
+export interface PipelineContextMetadataOverrides {}
+
 /**
 * Agent state - inferred from original project types
 */
@ -39,6 +51,19 @@ export interface Message {
  role: string;
 }

+/**
+ * Metadata shared across pipeline processors.
+ * Consumers can extend this through declaration merging on
+ * `LobeChatContextEngine.PipelineContextMetadataOverrides`.
+ */
+export interface PipelineContextMetadata extends PipelineContextMetadataOverrides {
+  [key: `${string}InjectedCount`]: number | undefined;
+  currentTokenCount?: number;
+  maxTokens?: number;
+  model?: string;
+  provider?: string;
+}
+
 /**
 * Pipeline context - core data structure flowing through the pipeline
 */
@ -55,16 +80,7 @@ export interface PipelineContext {
  /** Mutable message list being built */
  messages: Message[];
  /** Metadata for communication between processors */
-  metadata: {
-    /** Other custom metadata */
-    [key: string]: any;
-    /** Current token count estimate */
-    currentTokenCount?: number;
-    /** Maximum token limit */
-    maxTokens?: number;
-    /** Model identifier */
-    model?: string;
-  };
+  metadata: PipelineContextMetadata;
 }

 /**
@ -98,7 +114,7 @@ export interface PipelineResult {
  /** Final processed messages */
  messages: any[];
  /** Metadata from processing */
-  metadata: Record<string, any>;
+  metadata: PipelineContextMetadata;
  /** Execution statistics */
  stats: {
    /** Number of processors processed */
--- a/packages/database/src/models/message.ts
+++ b/packages/database/src/models/message.ts
@ -217,6 +217,7 @@ export class MessageModel {
        id: messages.id,
        role: messages.role,
        content: messages.content,
+        editorData: messages.editorData,
        reasoning: messages.reasoning,
        search: messages.search,
        metadata: messages.metadata,
@ -555,6 +556,7 @@ export class MessageModel {
        id: messages.id,
        role: messages.role,
        content: messages.content,
+        editorData: messages.editorData,
        reasoning: messages.reasoning,
        search: messages.search,
        metadata: messages.metadata,
--- a/packages/prompts/src/prompts/search/index.ts
+++ b/packages/prompts/src/prompts/search/index.ts
@ -1,2 +1,3 @@
 export * from './crawlResults';
 export * from './searchResults';
+export * from './xmlEscape';
--- a/packages/prompts/src/prompts/search/xmlEscape.ts
+++ b/packages/prompts/src/prompts/search/xmlEscape.ts
@ -1,3 +1,17 @@
+/**
+ * Escape all XML special characters (safe for both attributes and content)
+ * Includes: & < > " '
+ */
+export const escapeXml = (text: string | undefined | null): string => {
+  if (!text) return '';
+  return text
+    .replaceAll('&', '&amp;')
+    .replaceAll('<', '&lt;')
+    .replaceAll('>', '&gt;')
+    .replaceAll('"', '&quot;')
+    .replaceAll("'", '&apos;');
+};
+
 /**
 * Escape special characters for XML attributes
 * Includes: & " < >
--- a/packages/types/src/aiChat.ts
+++ b/packages/types/src/aiChat.ts
@ -1,6 +1,9 @@
 import { z } from 'zod';

+import type { MessageMetadata } from './message/common';
+import { ChatToolPayloadSchema, MessageMetadataSchema } from './message/common';
 import type { UIChatMessage } from './message';
+import type { CreateMessageParams } from './message/ui/params';
 import type { PageSelection } from './message/ui/params';
 import { PageSelectionSchema } from './message/ui/params';
 import type { OpenAIChatMessage } from './openai/chat';
@ -12,6 +15,8 @@ import { ThreadType } from './topic/thread';

 export interface SendNewMessage {
  content: string;
+  /** Lexical editor JSON state for rich text rendering */
+  editorData?: Record<string, any>;
  // if message has attached with files, then add files to message and the agent
  files?: string[];
  /** Page selections attached to this message (for Ask AI functionality) */
@ -19,6 +24,15 @@ export interface SendNewMessage {
  parentId?: string;
 }

+export interface SendPreloadMessage
+  extends Omit<
+    Pick<CreateMessageParams, 'content' | 'metadata' | 'plugin' | 'tool_call_id' | 'tools'>,
+    'metadata'
+  > {
+  metadata?: MessageMetadata;
+  role: 'assistant' | 'tool';
+}
+
 /**
 * Parameters for creating a new thread along with message
 */
@ -57,6 +71,7 @@ export interface SendMessageServerParams {
    title?: string;
    topicMessageIds?: string[];
  };
+  preloadMessages?: SendPreloadMessage[];
  newUserMessage: SendNewMessage;
  sessionId?: string;
  threadId?: string;
@ -71,6 +86,22 @@ export const CreateThreadWithMessageSchema = z.object({
  type: z.enum([ThreadType.Continuation, ThreadType.Standalone, ThreadType.Isolation]),
 });

+const SendPreloadMessageSchema = z.object({
+  content: z.string(),
+  metadata: MessageMetadataSchema.optional(),
+  plugin: z
+    .object({
+      apiName: z.string(),
+      arguments: z.string(),
+      identifier: z.string(),
+      type: z.string(),
+    })
+    .optional(),
+  role: z.enum(['assistant', 'tool']),
+  tool_call_id: z.string().optional(),
+  tools: z.array(ChatToolPayloadSchema).optional(),
+});
+
 export const AiSendMessageServerSchema = z.object({
  agentId: z.string().optional(),
  groupId: z.string().optional(),
@ -86,8 +117,10 @@ export const AiSendMessageServerSchema = z.object({
      topicMessageIds: z.array(z.string()).optional(),
    })
    .optional(),
+  preloadMessages: z.array(SendPreloadMessageSchema).optional(),
  newUserMessage: z.object({
    content: z.string(),
+    editorData: z.record(z.unknown()).optional(),
    files: z.array(z.string()).optional(),
    pageSelections: z.array(PageSelectionSchema).optional(),
    parentId: z.string().optional(),
--- a/packages/types/src/message/db/params.ts
+++ b/packages/types/src/message/db/params.ts
@ -91,6 +91,7 @@ export interface NewMessage {

 export interface UpdateMessageParams {
  content?: string;
+  editorData?: Record<string, any> | null;
  error?: ChatMessageError | null;
  imageList?: ChatImageItem[];
  metadata?: MessageMetadata;
@ -117,6 +118,7 @@ export interface NewMessageQueryParams {
 export const UpdateMessageParamsSchema = z
  .object({
    content: z.string().optional(),
+    editorData: z.record(z.any()).nullable().optional(),
    error: ChatMessageErrorSchema.nullable().optional(),
    imageList: z.array(ChatImageItemSchema).optional(),
    metadata: MessageMetadataSchema.optional(),
--- a/packages/types/src/message/ui/chat.ts
+++ b/packages/types/src/message/ui/chat.ts
@ -113,6 +113,8 @@ export interface UIChatMessage {
  compressedMessages?: UIChatMessage[];
  content: string;
  createdAt: number;
+  /** Lexical editor JSON state for rich text rendering */
+  editorData?: Record<string, any> | null;
  error?: ChatMessageError | null;
  // Extended fields
  extra?: ChatMessageExtra;
--- a/Show more
+++ b/Show more