diff --git a/README.md b/README.md
index 50f5171..453634f 100644
--- a/README.md
+++ b/README.md
@@ -30,9 +30,9 @@ Telegram **手机遥控器** for DeepSeek Harness：附着本机正在跑的 Web
 
 ### 30 秒理解
 
-1. 电脑 `dsh web` 开着，并打开一个对话  
-2. 手机 Bot 发 `/sessions`，点选该对话  
-3. 之后手机 ↔ Web 走**同一条**轨迹
+1. 电脑 `dsh web` 开着（会话列表与 Web 对齐，已归档除外）  
+2. 手机 Bot：`/sessions` → **工作区** → **会话** → 附着  
+3. 之后手机 ↔ Web 走**同一条**轨迹；可用 `/model` 切换模型（下一回合生效）
 
 ### 效果截图
 
@@ -115,14 +115,16 @@ curl -fsSL https://raw.githubusercontent.com/hi-wenw/dsh-telegram-channel/master
 ### 手机怎么用
 
 1. 菜单选 **2** 启动 `dsh web`（或自己运行 `dsh web`）  
-2. 浏览器打开一个对话并保持运行  
-3. 手机对 Bot：`/start` → `/sessions` → 点选 → 聊天  
+2. 浏览器里可看到工作区与会话（归档会话不会出现在手机列表）  
+3. 手机对 Bot：`/start` → `/sessions` → 选工作区 → 选会话 → 聊天  
+4. 需要换模型时：`/model` → 点选（与 Web 同 API，下一回合生效）
 
-输入框旁的 **/** 菜单应有：`start` `sessions` `status` `unbind` `help`。
+输入框旁的 **/** 菜单应有：`start` `sessions` `model` `status` `unbind` `help`。
 
 | 命令 | 作用 |
 |---|---|
-| `/sessions` | 列出并附着本机 live 会话 |
+| `/sessions` | 先列工作区，再列该工作区会话（与 Web 对齐，排除归档/空白/子代理）；冷会话附着时会自动 resume |
+| `/model` | 切换当前绑定会话的模型 |
 | `/status` | 当前绑定 |
 | `/unbind` | 只断开手机，**不关**电脑会话 |
 | `/help` | 帮助 |
@@ -184,7 +186,9 @@ dsh plugin --profile web add D:\path\to\dsh-telegram-channel
 | 手机完全没回复 / ConnectTimeout | 打开本地代理（如 7890），重启 `dsh web` |
 | `missing bot token` | 检查环境变量；**新开终端**再 `dsh web` |
 | 「无权限」 | User ID 必须是 `@userinfobot` 的数字 |
-| `/sessions` 无会话 | 先在 Web 打开对话 |
+| `/sessions` 无会话 | 确认 Web 有未归档会话；空白会话会被隐藏 |
+| `/sessions` 比电脑少很多 | 升级到 ≥0.3.0：应按工作区列出；仍少则检查是否归档 |
+| `/model` 不可用 | 需 `dsh web`（apiProxy）；先 `/sessions` 绑定 |
 | Telegram 401 | Token 错了或被 revoke |
 
 ---
@@ -233,11 +237,11 @@ dsh plugin --profile web add github:hi-wenw/dsh-telegram-channel
 
 ### What this is
 
-Telegram **mobile remote** for **live** DeepSeek Harness Web agents. Desktop/Web is the source of truth; the phone **attaches** (no parallel hidden agent).
+Telegram **mobile remote** for DeepSeek Harness Web sessions. Desktop/Web is the source of truth; the phone **attaches** (no parallel hidden agent). `/sessions` is **workspace → session** (Web-aligned, archived excluded). `/model` switches the bound session’s model for the next turn.
 
 ### Screenshots
 
-Phone: pick a live session and chat:
+Phone: pick a session and chat:
 
 ![Telegram mobile remote](docs/screenshots/mobile-chat.jpg)
 
@@ -267,7 +271,7 @@ Direct actions:
 .\scripts\install.ps1 -Action install -Token '...' -UserId '123456789'
 ```
 
-The script sets user env vars, ensures `allowBuilds`, and runs `dsh plugin add`. After **start**, open a Web chat → phone: `/sessions` → bind.
+The script sets user env vars, ensures `allowBuilds`, and runs `dsh plugin add`. After **start**, phone: `/sessions` → workspace → session → bind; optional `/model`.
 
 ### Unix
 
diff --git a/examples/telegram-agent/README.md b/examples/telegram-agent/README.md
index eb6895b..997a45a 100644
--- a/examples/telegram-agent/README.md
+++ b/examples/telegram-agent/README.md
@@ -27,4 +27,4 @@ dsh plugin --profile web add github:hi-wenw/dsh-telegram-channel
 Optional YAML allowlist (id override only — do **not** re-insert):  
 [`cordis.patch.example.yml`](cordis.patch.example.yml)
 
-Then: `dsh web` → open a Web chat → phone `/sessions` → bind. `/unbind` disconnects phone only.
+Then: `dsh web` → phone `/sessions` → workspace → session → bind. Optional `/model`. `/unbind` disconnects phone only.
diff --git a/lib/bridge.d.ts b/lib/bridge.d.ts
index 4e8aa51..3731968 100644
--- a/lib/bridge.d.ts
+++ b/lib/bridge.d.ts
@@ -18,6 +18,7 @@ export declare class TelegramBridge {
     private readonly sleep;
     private readonly maxMessageLength;
     private readonly bindings;
+    private readonly pickers;
     private polling;
     private offset;
     private pollPromise;
@@ -28,9 +29,17 @@ export declare class TelegramBridge {
     stop(): Promise<void>;
     processUpdate(update: TelegramUpdate): Promise<void>;
     private handleCallback;
+    private resolveCatalog;
+    private sendWorkspacePicker;
+    private sendSessionPicker;
+    private bindSession;
+    private sendModelPicker;
+    private sendEffortPicker;
+    private applyModel;
     private liveAgents;
     private findLiveAgent;
-    private sendSessionPicker;
+    /** Resume cold sessions when needed; never dispose the returned handle. */
+    private ensureLiveAgent;
     private sendStatus;
     private followupBound;
     private pollLoop;
diff --git a/lib/bridge.js b/lib/bridge.js
index 9bea425..b37faa6 100644
--- a/lib/bridge.js
+++ b/lib/bridge.js
@@ -1,10 +1,19 @@
 import { createUserMessage } from '@deepseek-ai/dsh-llm/message';
 import { SessionId } from '@deepseek-ai/dsh-session/types';
 import { isAuthorized } from './auth.js';
+import { catalogFromLiveAgents, loadCatalog, truncateButton, visibleSessionsForWorkspace, workspacesWithVisibleSessions, } from './catalog.js';
 import { TelegramClient, } from './client.js';
-import { BIND_CB_PREFIX, MSG, parseCommand } from './commands.js';
+import { MSG, parseCommand } from './commands.js';
 import { markdownToHtml, splitMessage } from './format.js';
-import { buttonLabel, describeAgent, detailLines, displayLabel } from './label.js';
+import { describeAgent, displayLabel } from './label.js';
+import { formatModel, loadSessionModels, selectSessionModel, } from './models.js';
+const WS_CB = 'ws:';
+const SID_CB = 'sid:';
+const BACK_WS_CB = 'wb';
+const MODEL_CB = 'mdl:';
+const EFFORT_CB = 'me:';
+const BACK_MODEL_CB = 'mb';
+const MAX_BUTTONS = 40;
 const defaultSleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
 function contentToText(content) {
     return content
@@ -21,6 +30,7 @@ export class TelegramBridge {
     sleep;
     maxMessageLength;
     bindings = new Map();
+    pickers = new Map();
     polling = false;
     offset;
     pollPromise;
@@ -46,7 +56,8 @@ export class TelegramBridge {
         });
         void this.client.setMyCommands([
             { command: 'start', description: '欢迎与用法' },
-            { command: 'sessions', description: '列出并附着本机 live 会话' },
+            { command: 'sessions', description: '按工作区列出并附着会话' },
+            { command: 'model', description: '切换当前绑定会话的模型' },
             { command: 'status', description: '查看当前绑定' },
             { command: 'unbind', description: '断开手机绑定（不关闭本机会话）' },
             { command: 'help', description: '显示帮助' },
@@ -70,6 +81,7 @@ export class TelegramBridge {
         this.disposeSessionListener = undefined;
         // Never dispose host agents — only clear remote bindings.
         this.bindings.clear();
+        this.pickers.clear();
         if (this.pollPromise) {
             await this.pollPromise.catch(() => { });
             this.pollPromise = undefined;
@@ -98,13 +110,17 @@ export class TelegramBridge {
                 await this.client.sendMessage(chatId, MSG.HELP);
                 return;
             case 'sessions':
-                await this.sendSessionPicker(chatId);
+                await this.sendWorkspacePicker(chatId);
+                return;
+            case 'model':
+                await this.sendModelPicker(chatId);
                 return;
             case 'status':
                 await this.sendStatus(chatId);
                 return;
             case 'unbind':
                 this.bindings.delete(String(chatId));
+                this.pickers.delete(String(chatId));
                 await this.client.sendMessage(chatId, MSG.UNBOUND);
                 return;
             case 'unknown':
@@ -129,21 +145,261 @@ export class TelegramBridge {
             return;
         }
         const data = cq.data ?? '';
-        if (!data.startsWith(BIND_CB_PREFIX)) {
+        const picker = this.pickers.get(String(chatId));
+        if (data === BACK_WS_CB) {
             await this.client.answerCallbackQuery(cq.id);
+            await this.sendWorkspacePicker(chatId, picker?.catalog);
             return;
         }
-        const sessionId = data.slice(BIND_CB_PREFIX.length);
-        const agent = this.findLiveAgent(sessionId);
+        if (data === BACK_MODEL_CB) {
+            await this.client.answerCallbackQuery(cq.id);
+            await this.sendModelPicker(chatId);
+            return;
+        }
+        if (data.startsWith(WS_CB)) {
+            const index = Number(data.slice(WS_CB.length));
+            await this.client.answerCallbackQuery(cq.id);
+            await this.sendSessionPicker(chatId, index);
+            return;
+        }
+        if (data.startsWith(SID_CB)) {
+            const index = Number(data.slice(SID_CB.length));
+            const row = picker?.sessions[index];
+            if (!row) {
+                await this.client.answerCallbackQuery(cq.id, '会话已过期');
+                await this.client.sendMessage(chatId, MSG.PICKER_STALE);
+                return;
+            }
+            await this.bindSession(chatId, cq.id, row);
+            return;
+        }
+        if (data.startsWith(MODEL_CB)) {
+            const index = Number(data.slice(MODEL_CB.length));
+            const option = picker?.models?.[index];
+            if (!option) {
+                await this.client.answerCallbackQuery(cq.id, '列表已过期');
+                await this.client.sendMessage(chatId, MSG.PICKER_STALE);
+                return;
+            }
+            if (option.efforts && option.efforts.length > 0) {
+                if (picker)
+                    picker.pendingModel = option;
+                await this.client.answerCallbackQuery(cq.id);
+                await this.sendEffortPicker(chatId, option);
+                return;
+            }
+            await this.applyModel(chatId, cq.id, option);
+            return;
+        }
+        if (data.startsWith(EFFORT_CB)) {
+            const index = Number(data.slice(EFFORT_CB.length));
+            const pending = picker?.pendingModel;
+            const effort = pending?.efforts?.[index];
+            if (!pending || !effort) {
+                await this.client.answerCallbackQuery(cq.id, '列表已过期');
+                await this.client.sendMessage(chatId, MSG.PICKER_STALE);
+                return;
+            }
+            await this.applyModel(chatId, cq.id, pending, effort.id);
+            return;
+        }
+        // Legacy bind:<sessionId> callbacks (older messages / tests)
+        if (data.startsWith('bind:')) {
+            const sessionId = data.slice('bind:'.length);
+            await this.bindSession(chatId, cq.id, {
+                sessionId,
+                title: sessionId,
+                blank: false,
+                running: true,
+                updatedAt: 0,
+            });
+            return;
+        }
+        await this.client.answerCallbackQuery(cq.id);
+    }
+    async resolveCatalog() {
+        try {
+            const fromApi = await loadCatalog(this.ctx);
+            if (fromApi)
+                return fromApi;
+        }
+        catch (err) {
+            this.ctx.logger.warn(`dsh-telegram-channel: catalog via apiProxy failed: ${this.redact(err)}`);
+        }
+        return catalogFromLiveAgents(this.liveAgents(), this.ctx);
+    }
+    async sendWorkspacePicker(chatId, existing) {
+        const catalog = existing ?? await this.resolveCatalog();
+        const workspaces = workspacesWithVisibleSessions(catalog);
+        if (workspaces.length === 0) {
+            this.pickers.delete(String(chatId));
+            await this.client.sendMessage(chatId, MSG.NO_SESSIONS);
+            return;
+        }
+        const shown = workspaces.slice(0, MAX_BUTTONS);
+        this.pickers.set(String(chatId), { workspaces: shown, sessions: [], catalog });
+        const keyboard = {
+            inline_keyboard: shown.map((ws, i) => ([{
+                    text: truncateButton(`${i + 1}. ${ws.title}`),
+                    callback_data: `${WS_CB}${i}`,
+                }])),
+        };
+        const body = [
+            `选择工作区（共 ${workspaces.length} 个，与 Web 对齐，已排除归档）：`,
+            '',
+            ...shown.map((ws, i) => {
+                const n = visibleSessionsForWorkspace(catalog, ws).length;
+                return `${i + 1}. ${ws.title}\n   ${ws.path}\n   会话：${n}`;
+            }),
+            workspaces.length > MAX_BUTTONS ? `\n仅显示前 ${MAX_BUTTONS} 个工作区。` : '',
+            '',
+            '点下方按钮进入该工作区的会话列表。',
+        ].filter(Boolean).join('\n');
+        await this.client.sendMessage(chatId, body, undefined, keyboard);
+    }
+    async sendSessionPicker(chatId, workspaceIndex) {
+        const picker = this.pickers.get(String(chatId));
+        const catalog = picker?.catalog ?? await this.resolveCatalog();
+        const workspaces = picker?.workspaces?.length
+            ? picker.workspaces
+            : workspacesWithVisibleSessions(catalog);
+        const workspace = workspaces[workspaceIndex];
+        if (!workspace) {
+            await this.client.sendMessage(chatId, MSG.PICKER_STALE);
+            return;
+        }
+        const sessions = visibleSessionsForWorkspace(catalog, workspace)
+            .slice()
+            .sort((a, b) => b.updatedAt - a.updatedAt);
+        if (sessions.length === 0) {
+            await this.client.sendMessage(chatId, MSG.NO_SESSIONS_IN_WS(workspace.title));
+            return;
+        }
+        const shown = sessions.slice(0, MAX_BUTTONS);
+        this.pickers.set(String(chatId), { workspaces, sessions: shown, catalog });
+        const keyboard = {
+            inline_keyboard: [
+                ...shown.map((row, i) => ([{
+                        text: truncateButton(`${i + 1}. ${row.title}${row.running ? '' : ' · 冷'}`),
+                        callback_data: `${SID_CB}${i}`,
+                    }])),
+                [{ text: '← 返回工作区', callback_data: BACK_WS_CB }],
+            ],
+        };
+        const body = [
+            `工作区：${workspace.title}`,
+            workspace.path,
+            '',
+            `选择会话（共 ${sessions.length} 个）：`,
+            '',
+            ...shown.map((row, i) => {
+                const mark = row.running ? '运行中' : '未附着';
+                return `${i + 1}. ${row.title}\n   ${mark} · …${row.sessionId.slice(-12)}`;
+            }),
+            sessions.length > MAX_BUTTONS ? `\n仅显示前 ${MAX_BUTTONS} 个会话。` : '',
+            '',
+            '点下方按钮附着；冷会话会自动 resume（不关闭 Web）。',
+        ].filter(Boolean).join('\n');
+        await this.client.sendMessage(chatId, body, undefined, keyboard);
+    }
+    async bindSession(chatId, callbackId, row) {
+        const agent = await this.ensureLiveAgent(row.sessionId);
         if (!agent) {
-            await this.client.answerCallbackQuery(cq.id, '会话不存在');
+            await this.client.answerCallbackQuery(callbackId, '无法附着');
+            await this.client.sendMessage(chatId, MSG.RESUME_FAILED);
+            return;
+        }
+        const parts = describeAgent(agent, 0, this.ctx);
+        const label = row.title && row.title !== row.sessionId
+            ? displayLabel({ ...parts, title: row.title })
+            : displayLabel(parts);
+        this.bindings.set(String(chatId), { chatId, sessionId: String(agent.id), label });
+        await this.client.answerCallbackQuery(callbackId, '已附着');
+        await this.client.sendMessage(chatId, MSG.BOUND(label));
+    }
+    async sendModelPicker(chatId) {
+        const binding = this.bindings.get(String(chatId));
+        if (!binding) {
+            await this.client.sendMessage(chatId, MSG.NEED_BIND);
+            return;
+        }
+        const agent = await this.ensureLiveAgent(binding.sessionId);
+        if (!agent) {
+            this.bindings.delete(String(chatId));
             await this.client.sendMessage(chatId, MSG.GONE);
             return;
         }
-        const label = displayLabel(describeAgent(agent, 0, this.ctx));
-        this.bindings.set(String(chatId), { chatId, sessionId: String(agent.id), label });
-        await this.client.answerCallbackQuery(cq.id, '已附着');
-        await this.client.sendMessage(chatId, MSG.BOUND(label));
+        try {
+            const snap = await loadSessionModels(this.ctx, binding.sessionId);
+            if (!snap.routable) {
+                await this.client.sendMessage(chatId, MSG.MODEL_UNROUTABLE(formatModel(snap.current)));
+                return;
+            }
+            if (snap.options.length === 0) {
+                await this.client.sendMessage(chatId, MSG.MODEL_EMPTY(formatModel(snap.current)));
+                return;
+            }
+            const shown = snap.options.slice(0, MAX_BUTTONS);
+            const prev = this.pickers.get(String(chatId));
+            this.pickers.set(String(chatId), {
+                workspaces: prev?.workspaces ?? [],
+                sessions: prev?.sessions ?? [],
+                catalog: prev?.catalog,
+                models: shown,
+            });
+            const keyboard = {
+                inline_keyboard: shown.map((opt, i) => ([{
+                        text: truncateButton(`${opt.label}${opt.provider === snap.current.provider && opt.model === snap.current.model ? ' ✓' : ''}`),
+                        callback_data: `${MODEL_CB}${i}`,
+                    }])),
+            };
+            const body = [
+                `当前模型：${formatModel(snap.current)}`,
+                `会话：${binding.label}`,
+                '',
+                '选择新模型（下一回合生效）：',
+            ].join('\n');
+            await this.client.sendMessage(chatId, body, undefined, keyboard);
+        }
+        catch (err) {
+            this.ctx.logger.warn(`dsh-telegram-channel: /model failed: ${this.redact(err)}`);
+            await this.client.sendMessage(chatId, MSG.MODEL_UNAVAILABLE);
+        }
+    }
+    async sendEffortPicker(chatId, option) {
+        const efforts = option.efforts ?? [];
+        const keyboard = {
+            inline_keyboard: [
+                ...efforts.map((e, i) => ([{
+                        text: truncateButton(e.name || e.id),
+                        callback_data: `${EFFORT_CB}${i}`,
+                    }])),
+                [{ text: '← 返回模型列表', callback_data: BACK_MODEL_CB }],
+            ],
+        };
+        await this.client.sendMessage(chatId, `已选 ${option.label}\n请选择 reasoning effort：`, undefined, keyboard);
+    }
+    async applyModel(chatId, callbackId, option, reasoningEffort) {
+        const binding = this.bindings.get(String(chatId));
+        if (!binding) {
+            await this.client.answerCallbackQuery(callbackId, '未绑定');
+            await this.client.sendMessage(chatId, MSG.NEED_BIND);
+            return;
+        }
+        try {
+            const selected = await selectSessionModel(this.ctx, binding.sessionId, {
+                provider: option.provider,
+                model: option.model,
+                reasoningEffort,
+            });
+            await this.client.answerCallbackQuery(callbackId, '已切换');
+            await this.client.sendMessage(chatId, MSG.MODEL_SET(formatModel(selected)));
+        }
+        catch (err) {
+            this.ctx.logger.warn(`dsh-telegram-channel: selectModel failed: ${this.redact(err)}`);
+            await this.client.answerCallbackQuery(callbackId, '切换失败');
+            await this.client.sendMessage(chatId, MSG.MODEL_FAILED);
+        }
     }
     liveAgents() {
         const agents = this.ctx.agents;
@@ -170,27 +426,22 @@ export class TelegramBridge {
         }
         return this.liveAgents().find((a) => String(a.id) === sessionId);
     }
-    async sendSessionPicker(chatId) {
-        const agents = this.liveAgents();
-        if (agents.length === 0) {
-            await this.client.sendMessage(chatId, MSG.NO_LIVE);
-            return;
+    /** Resume cold sessions when needed; never dispose the returned handle. */
+    async ensureLiveAgent(sessionId) {
+        const live = this.findLiveAgent(sessionId);
+        if (live)
+            return live;
+        const agents = this.ctx.agents;
+        if (typeof agents.resume !== 'function')
+            return undefined;
+        try {
+            const handle = await agents.resume({ resumeSessionId: SessionId(sessionId) });
+            return handle.agent;
+        }
+        catch (err) {
+            this.ctx.logger.warn(`dsh-telegram-channel: resume failed for ${sessionId}: ${this.redact(err)}`);
+            return undefined;
         }
-        const described = agents.map((agent, i) => describeAgent(agent, i, this.ctx));
-        const keyboard = {
-            inline_keyboard: described.map((parts) => ([{
-                    text: buttonLabel(parts),
-                    callback_data: `${BIND_CB_PREFIX}${parts.sessionId}`,
-                }])),
-        };
-        const body = [
-            `选择要遥控的本机会话（共 ${agents.length} 个）：`,
-            '',
-            ...described.map((parts) => detailLines(parts)),
-            '',
-            '点下方按钮附着对应会话。',
-        ].join('\n');
-        await this.client.sendMessage(chatId, body, undefined, keyboard);
     }
     async sendStatus(chatId) {
         const binding = this.bindings.get(String(chatId));
@@ -200,8 +451,7 @@ export class TelegramBridge {
         }
         const stillLive = this.findLiveAgent(binding.sessionId);
         if (!stillLive) {
-            this.bindings.delete(String(chatId));
-            await this.client.sendMessage(chatId, MSG.GONE);
+            await this.client.sendMessage(chatId, MSG.STATUS_BOUND_COLD(binding.label));
             return;
         }
         await this.client.sendMessage(chatId, MSG.STATUS_BOUND(binding.label));
@@ -212,7 +462,7 @@ export class TelegramBridge {
             await this.client.sendMessage(chatId, MSG.NEED_BIND);
             return;
         }
-        const agent = this.findLiveAgent(binding.sessionId);
+        const agent = await this.ensureLiveAgent(binding.sessionId);
         if (!agent) {
             this.bindings.delete(String(chatId));
             await this.client.sendMessage(chatId, MSG.GONE);
diff --git a/lib/catalog.d.ts b/lib/catalog.d.ts
new file mode 100644
index 0000000..e1f4cdc
--- /dev/null
+++ b/lib/catalog.d.ts
@@ -0,0 +1,30 @@
+import type { Context } from '@deepseek-ai/cordis';
+import type { Agent } from '@deepseek-ai/dsh-agent';
+export interface WorkspaceRow {
+    id: string;
+    title: string;
+    path: string;
+    sessionIds: string[];
+}
+export interface SessionRow {
+    sessionId: string;
+    title: string;
+    cwd?: string;
+    blank: boolean;
+    running: boolean;
+    origin?: string;
+    updatedAt: number;
+}
+export interface CatalogSnapshot {
+    workspaces: WorkspaceRow[];
+    sessionsById: Map<string, SessionRow>;
+    archivedIds: Set<string>;
+}
+/** Load workspaces + sessions aligned with Web UI (via apiProxy when available). */
+export declare function loadCatalog(ctx: Context): Promise<CatalogSnapshot | undefined>;
+/** Sessions visible under one workspace (Web-like filters). */
+export declare function visibleSessionsForWorkspace(catalog: CatalogSnapshot, workspace: WorkspaceRow): SessionRow[];
+export declare function workspacesWithVisibleSessions(catalog: CatalogSnapshot): WorkspaceRow[];
+export declare function truncateButton(text: string, max?: number): string;
+/** Fallback when apiProxy is unavailable: group live agents by cwd. */
+export declare function catalogFromLiveAgents(agents: Agent[], ctx?: Context): CatalogSnapshot;
diff --git a/lib/catalog.js b/lib/catalog.js
new file mode 100644
index 0000000..730adc0
--- /dev/null
+++ b/lib/catalog.js
@@ -0,0 +1,119 @@
+import { randomUUID } from 'node:crypto';
+import { describeAgent, workspaceName } from './label.js';
+function rpcCall(fn, payload) {
+    if (typeof fn !== 'function')
+        return undefined;
+    return fn({ rpcId: randomUUID(), payload });
+}
+function unwrap(res) {
+    const r = res;
+    if (r?.result && r.result.ok === true) {
+        return r.result.value;
+    }
+    // Some wrappers may return value directly
+    if (res && typeof res === 'object' && 'items' in res)
+        return res;
+    return undefined;
+}
+function titleOf(summary) {
+    const t = summary.projections?.values?.title;
+    if (typeof t === 'string' && t.trim())
+        return t.trim();
+    const ws = workspaceName(summary.cwd);
+    if (ws)
+        return ws;
+    const id = String(summary.sessionId);
+    return id.length > 12 ? `…${id.slice(-12)}` : id;
+}
+/** Load workspaces + sessions aligned with Web UI (via apiProxy when available). */
+export async function loadCatalog(ctx) {
+    const api = ctx.apiProxy;
+    const wsPromise = rpcCall(api?.workspace?.list, {});
+    const sessPromise = rpcCall(api?.sessions?.list, {});
+    if (!wsPromise || !sessPromise)
+        return undefined;
+    const [wsRaw, sessRaw] = await Promise.all([wsPromise, sessPromise]);
+    const wsVal = unwrap(wsRaw);
+    const sessVal = unwrap(sessRaw);
+    if (!wsVal || !sessVal)
+        return undefined;
+    const archivedIds = new Set((wsVal.archivedSessionIds ?? []).map(String));
+    const sessionsById = new Map();
+    for (const item of sessVal.items ?? []) {
+        const sessionId = String(item.sessionId);
+        sessionsById.set(sessionId, {
+            sessionId,
+            title: titleOf({ ...item, sessionId }),
+            cwd: item.cwd,
+            blank: Boolean(item.blank),
+            running: Boolean(item.running),
+            origin: item.origin,
+            updatedAt: Number(item.updatedAt) || 0,
+        });
+    }
+    const workspaces = (wsVal.items ?? []).map((w) => ({
+        id: String(w.workspaceId),
+        title: w.title || workspaceName(w.path) || String(w.workspaceId),
+        path: w.path,
+        sessionIds: (w.sessionIds ?? []).map(String),
+    }));
+    return { workspaces, sessionsById, archivedIds };
+}
+/** Sessions visible under one workspace (Web-like filters). */
+export function visibleSessionsForWorkspace(catalog, workspace) {
+    const rows = [];
+    for (const id of workspace.sessionIds) {
+        if (catalog.archivedIds.has(id))
+            continue;
+        const row = catalog.sessionsById.get(id);
+        if (!row)
+            continue;
+        if (row.origin === 'subagent')
+            continue;
+        if (row.blank)
+            continue;
+        rows.push(row);
+    }
+    return rows;
+}
+export function workspacesWithVisibleSessions(catalog) {
+    return catalog.workspaces.filter((w) => visibleSessionsForWorkspace(catalog, w).length > 0);
+}
+export function truncateButton(text, max = 64) {
+    const chars = [...text];
+    if (chars.length <= max)
+        return text;
+    return `${chars.slice(0, max - 1).join('')}…`;
+}
+/** Fallback when apiProxy is unavailable: group live agents by cwd. */
+export function catalogFromLiveAgents(agents, ctx) {
+    const sessionsById = new Map();
+    const byPath = new Map();
+    agents.forEach((agent, index) => {
+        const parts = describeAgent(agent, index, ctx);
+        const sessionId = parts.sessionId;
+        const cwd = parts.cwd ?? '(unknown)';
+        sessionsById.set(sessionId, {
+            sessionId,
+            title: parts.title || parts.workspace || sessionId,
+            cwd: parts.cwd,
+            blank: false,
+            running: true,
+            updatedAt: Date.now() - index,
+        });
+        const bucket = byPath.get(cwd) ?? {
+            title: parts.workspace || cwd,
+            path: cwd,
+            sessionIds: [],
+        };
+        bucket.sessionIds.push(sessionId);
+        byPath.set(cwd, bucket);
+    });
+    const workspaces = [...byPath.entries()].map(([path, bucket], i) => ({
+        id: `live:${i}`,
+        title: bucket.title,
+        path,
+        sessionIds: bucket.sessionIds,
+    }));
+    return { workspaces, sessionsById, archivedIds: new Set() };
+}
diff --git a/lib/commands.d.ts b/lib/commands.d.ts
index 3d93faf..ea81248 100644
--- a/lib/commands.d.ts
+++ b/lib/commands.d.ts
@@ -3,12 +3,23 @@ export declare const MSG: {
     readonly WELCOME: string;
     readonly HELP: string;
     readonly NEED_BIND: "尚未绑定本机会话。请先发送 /sessions 选择一个。";
-    readonly NO_LIVE: "当前没有正在运行的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。";
+    readonly NO_SESSIONS: "当前没有可附着的本机会话（已排除归档与空白会话）。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。";
+    readonly NO_SESSIONS_IN_WS: (title: string) => string;
+    /** @deprecated use NO_SESSIONS */
+    readonly NO_LIVE: "当前没有可附着的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。";
+    readonly PICKER_STALE: "列表已过期，请重新发送 /sessions。";
+    readonly RESUME_FAILED: "无法附着该会话（resume 失败）。请确认会话存在于 Web，或先在电脑打开后再试。";
     readonly BOUND: (label: string) => string;
     readonly UNBOUND: "已断开绑定。本机会话仍在运行。";
     readonly STATUS_NONE: "当前未绑定任何本机会话。发送 /sessions 选择。";
     readonly STATUS_BOUND: (label: string) => string;
-    readonly GONE: "绑定的会话已不在本机运行（可能已在 Web 关闭）。请重新 /sessions。";
+    readonly STATUS_BOUND_COLD: (label: string) => string;
+    readonly GONE: "绑定的会话已不可用。请重新 /sessions。";
+    readonly MODEL_UNAVAILABLE: "无法读取模型列表（需要 dsh web / apiProxy）。请确认本机 Harness 已加载 host-apiproxy。";
+    readonly MODEL_UNROUTABLE: (current: string) => string;
+    readonly MODEL_EMPTY: (current: string) => string;
+    readonly MODEL_SET: (selected: string) => string;
+    readonly MODEL_FAILED: "切换模型失败。请稍后重试或在 Web 中切换。";
     readonly unknown: (command: string) => string;
 };
 export type ParsedCommand = {
@@ -20,6 +31,9 @@ export type ParsedCommand = {
 } | {
     type: 'sessions';
     text: string;
+} | {
+    type: 'model';
+    text: string;
 } | {
     type: 'status';
     text: string;
@@ -35,5 +49,5 @@ export type ParsedCommand = {
     text: string;
 };
 export declare function parseCommand(text: string): ParsedCommand;
-/** Callback data prefix for session bind buttons. */
+/** @deprecated Prefer short index callbacks (ws:/sid:); kept for old messages. */
 export declare const BIND_CB_PREFIX = "bind:";
diff --git a/lib/commands.js b/lib/commands.js
index ac2ab3b..eb4d3af 100644
--- a/lib/commands.js
+++ b/lib/commands.js
@@ -2,20 +2,28 @@ export const MSG = {
     DENIED: '无权限。',
     WELCOME: [
         '你好，这是 DeepSeek Harness 的手机遥控器。',
-        '本机会话是真相源：请先在 Web 打开对话，再用 /sessions 选择并附着。',
+        '本机会话是真相源：请先在 Web 打开对话，再用 /sessions 选择工作区 → 会话并附着。',
         '发送 /help 查看命令。',
     ].join('\n'),
     HELP: [
-        '/sessions — 列出本机正在运行的会话并选择附着',
+        '/sessions — 按工作区列出本机会话（与 Web 对齐，排除归档）并附着',
+        '/model — 切换当前绑定会话的模型（下一回合生效）',
         '/status — 查看当前绑定',
         '/unbind — 断开绑定（不关闭本机会话）',
         '/help — 显示帮助',
         '',
         '绑定后直接发文字，消息会进入该本机会话；Web 与手机看到同一条轨迹。',
-        '仅白名单用户可用。无 live 会话时请先在 dsh web 开对话。',
+        '仅白名单用户可用。无会话时请先在 dsh web 开对话或保留历史会话。',
     ].join('\n'),
     NEED_BIND: '尚未绑定本机会话。请先发送 /sessions 选择一个。',
-    NO_LIVE: '当前没有正在运行的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+    NO_SESSIONS: '当前没有可附着的本机会话（已排除归档与空白会话）。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+    NO_SESSIONS_IN_WS(title) {
+        return `工作区「${title}」下没有可附着的会话。`;
+    },
+    /** @deprecated use NO_SESSIONS */
+    NO_LIVE: '当前没有可附着的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+    PICKER_STALE: '列表已过期，请重新发送 /sessions。',
+    RESUME_FAILED: '无法附着该会话（resume 失败）。请确认会话存在于 Web，或先在电脑打开后再试。',
     BOUND(label) {
         return `已附着本机会话：${label}\n此后消息将进入该会话（与 Web 同轨迹）。`;
     },
@@ -24,7 +32,21 @@ export const MSG = {
     STATUS_BOUND(label) {
         return `当前绑定：${label}`;
     },
-    GONE: '绑定的会话已不在本机运行（可能已在 Web 关闭）。请重新 /sessions。',
+    STATUS_BOUND_COLD(label) {
+        return `当前绑定：${label}\n（会话当前未在内存中运行；发消息时会自动 resume。）`;
+    },
+    GONE: '绑定的会话已不可用。请重新 /sessions。',
+    MODEL_UNAVAILABLE: '无法读取模型列表（需要 dsh web / apiProxy）。请确认本机 Harness 已加载 host-apiproxy。',
+    MODEL_UNROUTABLE(current) {
+        return `当前模型不可路由：${current}\n请在 Web 或本机配置可用 provider 后再试 /model。`;
+    },
+    MODEL_EMPTY(current) {
+        return `当前：${current}\n没有可切换的模型选项。`;
+    },
+    MODEL_SET(selected) {
+        return `已切换模型：${selected}\n下一回合生效。`;
+    },
+    MODEL_FAILED: '切换模型失败。请稍后重试或在 Web 中切换。',
     unknown(command) {
         return `未知命令 ${command}。发送 /help 查看可用命令。`;
     },
@@ -42,6 +64,8 @@ export function parseCommand(text) {
         case '/sessions':
         case '/list':
             return { type: 'sessions', text };
+        case '/model':
+            return { type: 'model', text };
         case '/status':
             return { type: 'status', text };
         case '/unbind':
@@ -51,5 +75,5 @@ export function parseCommand(text) {
             return { type: 'unknown', command, text };
     }
 }
-/** Callback data prefix for session bind buttons. */
+/** @deprecated Prefer short index callbacks (ws:/sid:); kept for old messages. */
 export const BIND_CB_PREFIX = 'bind:';
diff --git a/lib/models.d.ts b/lib/models.d.ts
new file mode 100644
index 0000000..938f092
--- /dev/null
+++ b/lib/models.d.ts
@@ -0,0 +1,34 @@
+import type { Context } from '@deepseek-ai/cordis';
+export interface ModelOption {
+    provider: string;
+    model: string;
+    label: string;
+    efforts?: Array<{
+        id: string;
+        name: string;
+    }>;
+}
+export interface ModelSnapshot {
+    current: {
+        provider: string;
+        model: string;
+        reasoningEffort?: string;
+    };
+    routable: boolean;
+    options: ModelOption[];
+}
+export declare function loadSessionModels(ctx: Context, sessionId: string): Promise<ModelSnapshot>;
+export declare function selectSessionModel(ctx: Context, sessionId: string, selection: {
+    provider: string;
+    model: string;
+    reasoningEffort?: string;
+}): Promise<{
+    provider: string;
+    model: string;
+    reasoningEffort?: string;
+}>;
+export declare function formatModel(sel: {
+    provider: string;
+    model: string;
+    reasoningEffort?: string;
+}): string;
diff --git a/lib/models.js b/lib/models.js
new file mode 100644
index 0000000..d324670
--- /dev/null
+++ b/lib/models.js
@@ -0,0 +1,52 @@
+import { randomUUID } from 'node:crypto';
+function unwrap(res) {
+    const r = res;
+    if (r?.result?.ok === true)
+        return r.result.value;
+    return undefined;
+}
+async function call(fn, payload) {
+    if (typeof fn !== 'function')
+        throw new Error('apiProxy sessions API unavailable');
+    return fn({ rpcId: randomUUID(), payload });
+}
+export async function loadSessionModels(ctx, sessionId) {
+    const api = ctx.apiProxy;
+    const raw = await call(api?.sessions?.models, { sessionId });
+    const value = unwrap(raw);
+    if (!value)
+        throw new Error('failed to load session models');
+    const options = [];
+    for (const group of value.groups ?? []) {
+        for (const m of group.models ?? []) {
+            options.push({
+                provider: group.id,
+                model: m.id,
+                label: `${group.name}/${m.name}`,
+                efforts: m.reasoning?.efforts?.map((e) => ({ id: e.id, name: e.name })),
+            });
+        }
+    }
+    return {
+        current: value.current,
+        routable: value.routable,
+        options,
+    };
+}
+export async function selectSessionModel(ctx, sessionId, selection) {
+    const api = ctx.apiProxy;
+    const raw = await call(api?.sessions?.selectModel, {
+        sessionId,
+        provider: selection.provider,
+        model: selection.model,
+        reasoningEffort: selection.reasoningEffort,
+    });
+    const value = unwrap(raw);
+    if (!value?.selected)
+        throw new Error('failed to select model');
+    return value.selected;
+}
+export function formatModel(sel) {
+    const base = `${sel.provider}/${sel.model}`;
+    return sel.reasoningEffort ? `${base} (${sel.reasoningEffort})` : base;
+}
diff --git a/package.json b/package.json
index d031f81..1695629 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "dsh-telegram-channel",
-  "version": "0.2.3",
-  "description": "DeepSeek Harness Telegram mobile remote: bind live Web sessions (Codex-style), same trajectory, /sessions picker, unbind/clear — dsh-plugin",
+  "version": "0.3.0",
+  "description": "DeepSeek Harness Telegram mobile remote: workspace→session picker (Web-aligned), /model switch, same trajectory — dsh-plugin",
   "keywords": [
     "telegram",
     "bot",
@@ -9,6 +9,8 @@
     "remote",
     "channel",
     "sessions",
+    "workspace",
+    "model",
     "bind",
     "unbind",
     "remove",
diff --git a/src/bridge.ts b/src/bridge.ts
index f2b9be9..aaec237 100644
--- a/src/bridge.ts
+++ b/src/bridge.ts
@@ -4,15 +4,31 @@ import { createUserMessage } from '@deepseek-ai/dsh-llm/message'
 import type { ContentBlock, TextBlock } from '@deepseek-ai/dsh-llm/types'
 import { SessionId, type SessionEvent } from '@deepseek-ai/dsh-session/types'
 import { isAuthorized } from './auth.js'
+import {
+  catalogFromLiveAgents,
+  loadCatalog,
+  truncateButton,
+  visibleSessionsForWorkspace,
+  workspacesWithVisibleSessions,
+  type CatalogSnapshot,
+  type SessionRow,
+  type WorkspaceRow,
+} from './catalog.js'
 import {
   TelegramClient,
   type InlineKeyboardMarkup,
   type TelegramClientLike,
   type TelegramUpdate,
 } from './client.js'
-import { BIND_CB_PREFIX, MSG, parseCommand } from './commands.js'
+import { MSG, parseCommand } from './commands.js'
 import { markdownToHtml, splitMessage } from './format.js'
-import { buttonLabel, describeAgent, detailLines, displayLabel } from './label.js'
+import { describeAgent, displayLabel } from './label.js'
+import {
+  formatModel,
+  loadSessionModels,
+  selectSessionModel,
+  type ModelOption,
+} from './models.js'
 
 export interface TelegramBridgeOptions {
   token: string
@@ -31,10 +47,26 @@ interface Binding {
   label: string
 }
 
+interface PickerState {
+  workspaces: WorkspaceRow[]
+  sessions: SessionRow[]
+  catalog?: CatalogSnapshot
+  models?: ModelOption[]
+  pendingModel?: ModelOption
+}
+
 interface SessionLike {
   id: ReturnType<typeof SessionId>
 }
 
+const WS_CB = 'ws:'
+const SID_CB = 'sid:'
+const BACK_WS_CB = 'wb'
+const MODEL_CB = 'mdl:'
+const EFFORT_CB = 'me:'
+const BACK_MODEL_CB = 'mb'
+const MAX_BUTTONS = 40
+
 const defaultSleep = (ms: number) => new Promise<void>((resolve) => setTimeout(resolve, ms))
 
 function contentToText(content: readonly ContentBlock[]): string {
@@ -54,6 +86,7 @@ export class TelegramBridge {
   private readonly maxMessageLength: number
 
   private readonly bindings = new Map<string, Binding>()
+  private readonly pickers = new Map<string, PickerState>()
   private polling = false
   private offset: number | undefined
   private pollPromise: Promise<void> | undefined
@@ -81,7 +114,8 @@ export class TelegramBridge {
     })
     void this.client.setMyCommands([
       { command: 'start', description: '欢迎与用法' },
-      { command: 'sessions', description: '列出并附着本机 live 会话' },
+      { command: 'sessions', description: '按工作区列出并附着会话' },
+      { command: 'model', description: '切换当前绑定会话的模型' },
       { command: 'status', description: '查看当前绑定' },
       { command: 'unbind', description: '断开手机绑定（不关闭本机会话）' },
       { command: 'help', description: '显示帮助' },
@@ -106,6 +140,7 @@ export class TelegramBridge {
     this.disposeSessionListener = undefined
     // Never dispose host agents — only clear remote bindings.
     this.bindings.clear()
+    this.pickers.clear()
     if (this.pollPromise) {
       await this.pollPromise.catch(() => {})
       this.pollPromise = undefined
@@ -137,13 +172,17 @@ export class TelegramBridge {
         await this.client.sendMessage(chatId, MSG.HELP)
         return
       case 'sessions':
-        await this.sendSessionPicker(chatId)
+        await this.sendWorkspacePicker(chatId)
+        return
+      case 'model':
+        await this.sendModelPicker(chatId)
         return
       case 'status':
         await this.sendStatus(chatId)
         return
       case 'unbind':
         this.bindings.delete(String(chatId))
+        this.pickers.delete(String(chatId))
         await this.client.sendMessage(chatId, MSG.UNBOUND)
         return
       case 'unknown':
@@ -169,21 +208,278 @@ export class TelegramBridge {
       return
     }
     const data = cq.data ?? ''
-    if (!data.startsWith(BIND_CB_PREFIX)) {
+    const picker = this.pickers.get(String(chatId))
+
+    if (data === BACK_WS_CB) {
       await this.client.answerCallbackQuery(cq.id)
+      await this.sendWorkspacePicker(chatId, picker?.catalog)
       return
     }
-    const sessionId = data.slice(BIND_CB_PREFIX.length)
-    const agent = this.findLiveAgent(sessionId)
+    if (data === BACK_MODEL_CB) {
+      await this.client.answerCallbackQuery(cq.id)
+      await this.sendModelPicker(chatId)
+      return
+    }
+    if (data.startsWith(WS_CB)) {
+      const index = Number(data.slice(WS_CB.length))
+      await this.client.answerCallbackQuery(cq.id)
+      await this.sendSessionPicker(chatId, index)
+      return
+    }
+    if (data.startsWith(SID_CB)) {
+      const index = Number(data.slice(SID_CB.length))
+      const row = picker?.sessions[index]
+      if (!row) {
+        await this.client.answerCallbackQuery(cq.id, '会话已过期')
+        await this.client.sendMessage(chatId, MSG.PICKER_STALE)
+        return
+      }
+      await this.bindSession(chatId, cq.id, row)
+      return
+    }
+    if (data.startsWith(MODEL_CB)) {
+      const index = Number(data.slice(MODEL_CB.length))
+      const option = picker?.models?.[index]
+      if (!option) {
+        await this.client.answerCallbackQuery(cq.id, '列表已过期')
+        await this.client.sendMessage(chatId, MSG.PICKER_STALE)
+        return
+      }
+      if (option.efforts && option.efforts.length > 0) {
+        if (picker) picker.pendingModel = option
+        await this.client.answerCallbackQuery(cq.id)
+        await this.sendEffortPicker(chatId, option)
+        return
+      }
+      await this.applyModel(chatId, cq.id, option)
+      return
+    }
+    if (data.startsWith(EFFORT_CB)) {
+      const index = Number(data.slice(EFFORT_CB.length))
+      const pending = picker?.pendingModel
+      const effort = pending?.efforts?.[index]
+      if (!pending || !effort) {
+        await this.client.answerCallbackQuery(cq.id, '列表已过期')
+        await this.client.sendMessage(chatId, MSG.PICKER_STALE)
+        return
+      }
+      await this.applyModel(chatId, cq.id, pending, effort.id)
+      return
+    }
+
+    // Legacy bind:<sessionId> callbacks (older messages / tests)
+    if (data.startsWith('bind:')) {
+      const sessionId = data.slice('bind:'.length)
+      await this.bindSession(chatId, cq.id, {
+        sessionId,
+        title: sessionId,
+        blank: false,
+        running: true,
+        updatedAt: 0,
+      })
+      return
+    }
+
+    await this.client.answerCallbackQuery(cq.id)
+  }
+
+  private async resolveCatalog(): Promise<CatalogSnapshot> {
+    try {
+      const fromApi = await loadCatalog(this.ctx)
+      if (fromApi) return fromApi
+    } catch (err) {
+      this.ctx.logger.warn(`dsh-telegram-channel: catalog via apiProxy failed: ${this.redact(err)}`)
+    }
+    return catalogFromLiveAgents(this.liveAgents(), this.ctx)
+  }
+
+  private async sendWorkspacePicker(chatId: number, existing?: CatalogSnapshot): Promise<void> {
+    const catalog = existing ?? await this.resolveCatalog()
+    const workspaces = workspacesWithVisibleSessions(catalog)
+    if (workspaces.length === 0) {
+      this.pickers.delete(String(chatId))
+      await this.client.sendMessage(chatId, MSG.NO_SESSIONS)
+      return
+    }
+    const shown = workspaces.slice(0, MAX_BUTTONS)
+    this.pickers.set(String(chatId), { workspaces: shown, sessions: [], catalog })
+    const keyboard: InlineKeyboardMarkup = {
+      inline_keyboard: shown.map((ws, i) => ([{
+        text: truncateButton(`${i + 1}. ${ws.title}`),
+        callback_data: `${WS_CB}${i}`,
+      }])),
+    }
+    const body = [
+      `选择工作区（共 ${workspaces.length} 个，与 Web 对齐，已排除归档）：`,
+      '',
+      ...shown.map((ws, i) => {
+        const n = visibleSessionsForWorkspace(catalog, ws).length
+        return `${i + 1}. ${ws.title}\n   ${ws.path}\n   会话：${n}`
+      }),
+      workspaces.length > MAX_BUTTONS ? `\n仅显示前 ${MAX_BUTTONS} 个工作区。` : '',
+      '',
+      '点下方按钮进入该工作区的会话列表。',
+    ].filter(Boolean).join('\n')
+    await this.client.sendMessage(chatId, body, undefined, keyboard)
+  }
+
+  private async sendSessionPicker(chatId: number, workspaceIndex: number): Promise<void> {
+    const picker = this.pickers.get(String(chatId))
+    const catalog = picker?.catalog ?? await this.resolveCatalog()
+    const workspaces = picker?.workspaces?.length
+      ? picker.workspaces
+      : workspacesWithVisibleSessions(catalog)
+    const workspace = workspaces[workspaceIndex]
+    if (!workspace) {
+      await this.client.sendMessage(chatId, MSG.PICKER_STALE)
+      return
+    }
+    const sessions = visibleSessionsForWorkspace(catalog, workspace)
+      .slice()
+      .sort((a, b) => b.updatedAt - a.updatedAt)
+    if (sessions.length === 0) {
+      await this.client.sendMessage(chatId, MSG.NO_SESSIONS_IN_WS(workspace.title))
+      return
+    }
+    const shown = sessions.slice(0, MAX_BUTTONS)
+    this.pickers.set(String(chatId), { workspaces, sessions: shown, catalog })
+    const keyboard: InlineKeyboardMarkup = {
+      inline_keyboard: [
+        ...shown.map((row, i) => ([{
+          text: truncateButton(`${i + 1}. ${row.title}${row.running ? '' : ' · 冷'}`),
+          callback_data: `${SID_CB}${i}`,
+        }])),
+        [{ text: '← 返回工作区', callback_data: BACK_WS_CB }],
+      ],
+    }
+    const body = [
+      `工作区：${workspace.title}`,
+      workspace.path,
+      '',
+      `选择会话（共 ${sessions.length} 个）：`,
+      '',
+      ...shown.map((row, i) => {
+        const mark = row.running ? '运行中' : '未附着'
+        return `${i + 1}. ${row.title}\n   ${mark} · …${row.sessionId.slice(-12)}`
+      }),
+      sessions.length > MAX_BUTTONS ? `\n仅显示前 ${MAX_BUTTONS} 个会话。` : '',
+      '',
+      '点下方按钮附着；冷会话会自动 resume（不关闭 Web）。',
+    ].filter(Boolean).join('\n')
+    await this.client.sendMessage(chatId, body, undefined, keyboard)
+  }
+
+  private async bindSession(chatId: number, callbackId: string, row: SessionRow): Promise<void> {
+    const agent = await this.ensureLiveAgent(row.sessionId)
     if (!agent) {
-      await this.client.answerCallbackQuery(cq.id, '会话不存在')
+      await this.client.answerCallbackQuery(callbackId, '无法附着')
+      await this.client.sendMessage(chatId, MSG.RESUME_FAILED)
+      return
+    }
+    const parts = describeAgent(agent, 0, this.ctx)
+    const label = row.title && row.title !== row.sessionId
+      ? displayLabel({ ...parts, title: row.title })
+      : displayLabel(parts)
+    this.bindings.set(String(chatId), { chatId, sessionId: String(agent.id), label })
+    await this.client.answerCallbackQuery(callbackId, '已附着')
+    await this.client.sendMessage(chatId, MSG.BOUND(label))
+  }
+
+  private async sendModelPicker(chatId: number): Promise<void> {
+    const binding = this.bindings.get(String(chatId))
+    if (!binding) {
+      await this.client.sendMessage(chatId, MSG.NEED_BIND)
+      return
+    }
+    const agent = await this.ensureLiveAgent(binding.sessionId)
+    if (!agent) {
+      this.bindings.delete(String(chatId))
       await this.client.sendMessage(chatId, MSG.GONE)
       return
     }
-    const label = displayLabel(describeAgent(agent, 0, this.ctx))
-    this.bindings.set(String(chatId), { chatId, sessionId: String(agent.id), label })
-    await this.client.answerCallbackQuery(cq.id, '已附着')
-    await this.client.sendMessage(chatId, MSG.BOUND(label))
+    try {
+      const snap = await loadSessionModels(this.ctx, binding.sessionId)
+      if (!snap.routable) {
+        await this.client.sendMessage(chatId, MSG.MODEL_UNROUTABLE(formatModel(snap.current)))
+        return
+      }
+      if (snap.options.length === 0) {
+        await this.client.sendMessage(chatId, MSG.MODEL_EMPTY(formatModel(snap.current)))
+        return
+      }
+      const shown = snap.options.slice(0, MAX_BUTTONS)
+      const prev = this.pickers.get(String(chatId))
+      this.pickers.set(String(chatId), {
+        workspaces: prev?.workspaces ?? [],
+        sessions: prev?.sessions ?? [],
+        catalog: prev?.catalog,
+        models: shown,
+      })
+      const keyboard: InlineKeyboardMarkup = {
+        inline_keyboard: shown.map((opt, i) => ([{
+          text: truncateButton(
+            `${opt.label}${opt.provider === snap.current.provider && opt.model === snap.current.model ? ' ✓' : ''}`,
+          ),
+          callback_data: `${MODEL_CB}${i}`,
+        }])),
+      }
+      const body = [
+        `当前模型：${formatModel(snap.current)}`,
+        `会话：${binding.label}`,
+        '',
+        '选择新模型（下一回合生效）：',
+      ].join('\n')
+      await this.client.sendMessage(chatId, body, undefined, keyboard)
+    } catch (err) {
+      this.ctx.logger.warn(`dsh-telegram-channel: /model failed: ${this.redact(err)}`)
+      await this.client.sendMessage(chatId, MSG.MODEL_UNAVAILABLE)
+    }
+  }
+
+  private async sendEffortPicker(chatId: number, option: ModelOption): Promise<void> {
+    const efforts = option.efforts ?? []
+    const keyboard: InlineKeyboardMarkup = {
+      inline_keyboard: [
+        ...efforts.map((e, i) => ([{
+          text: truncateButton(e.name || e.id),
+          callback_data: `${EFFORT_CB}${i}`,
+        }])),
+        [{ text: '← 返回模型列表', callback_data: BACK_MODEL_CB }],
+      ],
+    }
+    await this.client.sendMessage(
+      chatId,
+      `已选 ${option.label}\n请选择 reasoning effort：`,
+      undefined,
+      keyboard,
+    )
+  }
+
+  private async applyModel(
+    chatId: number,
+    callbackId: string,
+    option: ModelOption,
+    reasoningEffort?: string,
+  ): Promise<void> {
+    const binding = this.bindings.get(String(chatId))
+    if (!binding) {
+      await this.client.answerCallbackQuery(callbackId, '未绑定')
+      await this.client.sendMessage(chatId, MSG.NEED_BIND)
+      return
+    }
+    try {
+      const selected = await selectSessionModel(this.ctx, binding.sessionId, {
+        provider: option.provider,
+        model: option.model,
+        reasoningEffort,
+      })
+      await this.client.answerCallbackQuery(callbackId, '已切换')
+      await this.client.sendMessage(chatId, MSG.MODEL_SET(formatModel(selected)))
+    } catch (err) {
+      this.ctx.logger.warn(`dsh-telegram-channel: selectModel failed: ${this.redact(err)}`)
+      await this.client.answerCallbackQuery(callbackId, '切换失败')
+      await this.client.sendMessage(chatId, MSG.MODEL_FAILED)
+    }
   }
 
   private liveAgents(): Agent[] {
@@ -209,27 +505,19 @@ export class TelegramBridge {
     return this.liveAgents().find((a) => String(a.id) === sessionId)
   }
 
-  private async sendSessionPicker(chatId: number): Promise<void> {
-    const agents = this.liveAgents()
-    if (agents.length === 0) {
-      await this.client.sendMessage(chatId, MSG.NO_LIVE)
-      return
+  /** Resume cold sessions when needed; never dispose the returned handle. */
+  private async ensureLiveAgent(sessionId: string): Promise<Agent | undefined> {
+    const live = this.findLiveAgent(sessionId)
+    if (live) return live
+    const agents = this.ctx.agents as { resume?: (opts: { resumeSessionId: ReturnType<typeof SessionId> }) => Promise<{ agent: Agent }> }
+    if (typeof agents.resume !== 'function') return undefined
+    try {
+      const handle = await agents.resume({ resumeSessionId: SessionId(sessionId) })
+      return handle.agent
+    } catch (err) {
+      this.ctx.logger.warn(`dsh-telegram-channel: resume failed for ${sessionId}: ${this.redact(err)}`)
+      return undefined
     }
-    const described = agents.map((agent, i) => describeAgent(agent, i, this.ctx))
-    const keyboard: InlineKeyboardMarkup = {
-      inline_keyboard: described.map((parts) => ([{
-        text: buttonLabel(parts),
-        callback_data: `${BIND_CB_PREFIX}${parts.sessionId}`,
-      }])),
-    }
-    const body = [
-      `选择要遥控的本机会话（共 ${agents.length} 个）：`,
-      '',
-      ...described.map((parts) => detailLines(parts)),
-      '',
-      '点下方按钮附着对应会话。',
-    ].join('\n')
-    await this.client.sendMessage(chatId, body, undefined, keyboard)
   }
 
   private async sendStatus(chatId: number): Promise<void> {
@@ -240,8 +528,7 @@ export class TelegramBridge {
     }
     const stillLive = this.findLiveAgent(binding.sessionId)
     if (!stillLive) {
-      this.bindings.delete(String(chatId))
-      await this.client.sendMessage(chatId, MSG.GONE)
+      await this.client.sendMessage(chatId, MSG.STATUS_BOUND_COLD(binding.label))
       return
     }
     await this.client.sendMessage(chatId, MSG.STATUS_BOUND(binding.label))
@@ -253,7 +540,7 @@ export class TelegramBridge {
       await this.client.sendMessage(chatId, MSG.NEED_BIND)
       return
     }
-    const agent = this.findLiveAgent(binding.sessionId)
+    const agent = await this.ensureLiveAgent(binding.sessionId)
     if (!agent) {
       this.bindings.delete(String(chatId))
       await this.client.sendMessage(chatId, MSG.GONE)
diff --git a/src/catalog.ts b/src/catalog.ts
new file mode 100644
index 0000000..eab45b6
--- /dev/null
+++ b/src/catalog.ts
@@ -0,0 +1,178 @@
+import { randomUUID } from 'node:crypto'
+import type { Context } from '@deepseek-ai/cordis'
+import type { Agent } from '@deepseek-ai/dsh-agent'
+import { describeAgent, workspaceName } from './label.js'
+
+export interface WorkspaceRow {
+  id: string
+  title: string
+  path: string
+  sessionIds: string[]
+}
+
+export interface SessionRow {
+  sessionId: string
+  title: string
+  cwd?: string
+  blank: boolean
+  running: boolean
+  origin?: string
+  updatedAt: number
+}
+
+export interface CatalogSnapshot {
+  workspaces: WorkspaceRow[]
+  sessionsById: Map<string, SessionRow>
+  archivedIds: Set<string>
+}
+
+type RpcOk<T> = { result: { ok: true; value: T } }
+type ApiFn = (req: { rpcId: string; payload: unknown }) => Promise<unknown>
+
+function rpcCall(fn: ApiFn | undefined, payload: unknown): Promise<unknown> | undefined {
+  if (typeof fn !== 'function') return undefined
+  return fn({ rpcId: randomUUID(), payload })
+}
+
+function unwrap<T>(res: unknown): T | undefined {
+  const r = res as RpcOk<T> | undefined
+  if (r?.result && (r.result as { ok?: boolean }).ok === true) {
+    return (r.result as { value: T }).value
+  }
+  // Some wrappers may return value directly
+  if (res && typeof res === 'object' && 'items' in (res as object)) return res as T
+  return undefined
+}
+
+function titleOf(summary: {
+  sessionId: string
+  cwd?: string
+  projections?: { values?: { title?: string | null } }
+}): string {
+  const t = summary.projections?.values?.title
+  if (typeof t === 'string' && t.trim()) return t.trim()
+  const ws = workspaceName(summary.cwd)
+  if (ws) return ws
+  const id = String(summary.sessionId)
+  return id.length > 12 ? `…${id.slice(-12)}` : id
+}
+
+/** Load workspaces + sessions aligned with Web UI (via apiProxy when available). */
+export async function loadCatalog(ctx: Context): Promise<CatalogSnapshot | undefined> {
+  const api = (ctx as {
+    apiProxy?: {
+      workspace?: { list?: ApiFn }
+      sessions?: { list?: ApiFn }
+    }
+  }).apiProxy
+
+  const wsPromise = rpcCall(api?.workspace?.list, {})
+  const sessPromise = rpcCall(api?.sessions?.list, {})
+  if (!wsPromise || !sessPromise) return undefined
+
+  const [wsRaw, sessRaw] = await Promise.all([wsPromise, sessPromise])
+  const wsVal = unwrap<{
+    items: Array<{ workspaceId: string; path: string; title: string; sessionIds: string[] }>
+    archivedSessionIds: string[]
+  }>(wsRaw)
+  const sessVal = unwrap<{
+    items: Array<{
+      sessionId: string
+      updatedAt: number
+      running: boolean
+      blank: boolean
+      origin?: string
+      cwd?: string
+      projections?: { values?: { title?: string | null } }
+    }>
+  }>(sessRaw)
+
+  if (!wsVal || !sessVal) return undefined
+
+  const archivedIds = new Set((wsVal.archivedSessionIds ?? []).map(String))
+  const sessionsById = new Map<string, SessionRow>()
+  for (const item of sessVal.items ?? []) {
+    const sessionId = String(item.sessionId)
+    sessionsById.set(sessionId, {
+      sessionId,
+      title: titleOf({ ...item, sessionId }),
+      cwd: item.cwd,
+      blank: Boolean(item.blank),
+      running: Boolean(item.running),
+      origin: item.origin,
+      updatedAt: Number(item.updatedAt) || 0,
+    })
+  }
+
+  const workspaces: WorkspaceRow[] = (wsVal.items ?? []).map((w) => ({
+    id: String(w.workspaceId),
+    title: w.title || workspaceName(w.path) || String(w.workspaceId),
+    path: w.path,
+    sessionIds: (w.sessionIds ?? []).map(String),
+  }))
+
+  return { workspaces, sessionsById, archivedIds }
+}
+
+/** Sessions visible under one workspace (Web-like filters). */
+export function visibleSessionsForWorkspace(
+  catalog: CatalogSnapshot,
+  workspace: WorkspaceRow,
+): SessionRow[] {
+  const rows: SessionRow[] = []
+  for (const id of workspace.sessionIds) {
+    if (catalog.archivedIds.has(id)) continue
+    const row = catalog.sessionsById.get(id)
+    if (!row) continue
+    if (row.origin === 'subagent') continue
+    if (row.blank) continue
+    rows.push(row)
+  }
+  return rows
+}
+
+export function workspacesWithVisibleSessions(catalog: CatalogSnapshot): WorkspaceRow[] {
+  return catalog.workspaces.filter((w) => visibleSessionsForWorkspace(catalog, w).length > 0)
+}
+
+export function truncateButton(text: string, max = 64): string {
+  const chars = [...text]
+  if (chars.length <= max) return text
+  return `${chars.slice(0, max - 1).join('')}…`
+}
+
+/** Fallback when apiProxy is unavailable: group live agents by cwd. */
+export function catalogFromLiveAgents(agents: Agent[], ctx?: Context): CatalogSnapshot {
+  const sessionsById = new Map<string, SessionRow>()
+  const byPath = new Map<string, { title: string; path: string; sessionIds: string[] }>()
+
+  agents.forEach((agent, index) => {
+    const parts = describeAgent(agent, index, ctx)
+    const sessionId = parts.sessionId
+    const cwd = parts.cwd ?? '(unknown)'
+    sessionsById.set(sessionId, {
+      sessionId,
+      title: parts.title || parts.workspace || sessionId,
+      cwd: parts.cwd,
+      blank: false,
+      running: true,
+      updatedAt: Date.now() - index,
+    })
+    const bucket = byPath.get(cwd) ?? {
+      title: parts.workspace || cwd,
+      path: cwd,
+      sessionIds: [],
+    }
+    bucket.sessionIds.push(sessionId)
+    byPath.set(cwd, bucket)
+  })
+
+  const workspaces: WorkspaceRow[] = [...byPath.entries()].map(([path, bucket], i) => ({
+    id: `live:${i}`,
+    title: bucket.title,
+    path,
+    sessionIds: bucket.sessionIds,
+  }))
+
+  return { workspaces, sessionsById, archivedIds: new Set() }
+}
diff --git a/src/commands.ts b/src/commands.ts
index c736e36..5d23c5b 100644
--- a/src/commands.ts
+++ b/src/commands.ts
@@ -2,20 +2,28 @@ export const MSG = {
   DENIED: '无权限。',
   WELCOME: [
     '你好，这是 DeepSeek Harness 的手机遥控器。',
-    '本机会话是真相源：请先在 Web 打开对话，再用 /sessions 选择并附着。',
+    '本机会话是真相源：请先在 Web 打开对话，再用 /sessions 选择工作区 → 会话并附着。',
     '发送 /help 查看命令。',
   ].join('\n'),
   HELP: [
-    '/sessions — 列出本机正在运行的会话并选择附着',
+    '/sessions — 按工作区列出本机会话（与 Web 对齐，排除归档）并附着',
+    '/model — 切换当前绑定会话的模型（下一回合生效）',
     '/status — 查看当前绑定',
     '/unbind — 断开绑定（不关闭本机会话）',
     '/help — 显示帮助',
     '',
     '绑定后直接发文字，消息会进入该本机会话；Web 与手机看到同一条轨迹。',
-    '仅白名单用户可用。无 live 会话时请先在 dsh web 开对话。',
+    '仅白名单用户可用。无会话时请先在 dsh web 开对话或保留历史会话。',
   ].join('\n'),
   NEED_BIND: '尚未绑定本机会话。请先发送 /sessions 选择一个。',
-  NO_LIVE: '当前没有正在运行的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+  NO_SESSIONS: '当前没有可附着的本机会话（已排除归档与空白会话）。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+  NO_SESSIONS_IN_WS(title: string): string {
+    return `工作区「${title}」下没有可附着的会话。`
+  },
+  /** @deprecated use NO_SESSIONS */
+  NO_LIVE: '当前没有可附着的本机会话。请先在 Web（dsh web）打开或继续一个对话，再发 /sessions。',
+  PICKER_STALE: '列表已过期，请重新发送 /sessions。',
+  RESUME_FAILED: '无法附着该会话（resume 失败）。请确认会话存在于 Web，或先在电脑打开后再试。',
   BOUND(label: string): string {
     return `已附着本机会话：${label}\n此后消息将进入该会话（与 Web 同轨迹）。`
   },
@@ -24,7 +32,21 @@ export const MSG = {
   STATUS_BOUND(label: string): string {
     return `当前绑定：${label}`
   },
-  GONE: '绑定的会话已不在本机运行（可能已在 Web 关闭）。请重新 /sessions。',
+  STATUS_BOUND_COLD(label: string): string {
+    return `当前绑定：${label}\n（会话当前未在内存中运行；发消息时会自动 resume。）`
+  },
+  GONE: '绑定的会话已不可用。请重新 /sessions。',
+  MODEL_UNAVAILABLE: '无法读取模型列表（需要 dsh web / apiProxy）。请确认本机 Harness 已加载 host-apiproxy。',
+  MODEL_UNROUTABLE(current: string): string {
+    return `当前模型不可路由：${current}\n请在 Web 或本机配置可用 provider 后再试 /model。`
+  },
+  MODEL_EMPTY(current: string): string {
+    return `当前：${current}\n没有可切换的模型选项。`
+  },
+  MODEL_SET(selected: string): string {
+    return `已切换模型：${selected}\n下一回合生效。`
+  },
+  MODEL_FAILED: '切换模型失败。请稍后重试或在 Web 中切换。',
   unknown(command: string): string {
     return `未知命令 ${command}。发送 /help 查看可用命令。`
   },
@@ -34,6 +56,7 @@ export type ParsedCommand =
   | { type: 'start'; text: string }
   | { type: 'help'; text: string }
   | { type: 'sessions'; text: string }
+  | { type: 'model'; text: string }
   | { type: 'status'; text: string }
   | { type: 'unbind'; text: string }
   | { type: 'unknown'; command: string; text: string }
@@ -51,6 +74,8 @@ export function parseCommand(text: string): ParsedCommand {
     case '/sessions':
     case '/list':
       return { type: 'sessions', text }
+    case '/model':
+      return { type: 'model', text }
     case '/status':
       return { type: 'status', text }
     case '/unbind':
@@ -61,5 +86,5 @@ export function parseCommand(text: string): ParsedCommand {
   }
 }
 
-/** Callback data prefix for session bind buttons. */
+/** @deprecated Prefer short index callbacks (ws:/sid:); kept for old messages. */
 export const BIND_CB_PREFIX = 'bind:'
diff --git a/src/models.ts b/src/models.ts
new file mode 100644
index 0000000..300922f
--- /dev/null
+++ b/src/models.ts
@@ -0,0 +1,91 @@
+import { randomUUID } from 'node:crypto'
+import type { Context } from '@deepseek-ai/cordis'
+
+export interface ModelOption {
+  provider: string
+  model: string
+  label: string
+  efforts?: Array<{ id: string; name: string }>
+}
+
+export interface ModelSnapshot {
+  current: { provider: string; model: string; reasoningEffort?: string }
+  routable: boolean
+  options: ModelOption[]
+}
+
+type ApiFn = (req: { rpcId: string; payload: unknown }) => Promise<unknown>
+
+function unwrap<T>(res: unknown): T | undefined {
+  const r = res as { result?: { ok?: boolean; value?: T } } | undefined
+  if (r?.result?.ok === true) return r.result.value
+  return undefined
+}
+
+async function call(fn: ApiFn | undefined, payload: unknown): Promise<unknown> {
+  if (typeof fn !== 'function') throw new Error('apiProxy sessions API unavailable')
+  return fn({ rpcId: randomUUID(), payload })
+}
+
+export async function loadSessionModels(ctx: Context, sessionId: string): Promise<ModelSnapshot> {
+  const api = (ctx as {
+    apiProxy?: { sessions?: { models?: ApiFn } }
+  }).apiProxy
+  const raw = await call(api?.sessions?.models, { sessionId })
+  const value = unwrap<{
+    current: { provider: string; model: string; reasoningEffort?: string }
+    routable: boolean
+    groups: Array<{
+      id: string
+      name: string
+      models: Array<{
+        id: string
+        name: string
+        reasoning?: { efforts?: Array<{ id: string; name: string }> }
+      }>
+    }>
+  }>(raw)
+  if (!value) throw new Error('failed to load session models')
+
+  const options: ModelOption[] = []
+  for (const group of value.groups ?? []) {
+    for (const m of group.models ?? []) {
+      options.push({
+        provider: group.id,
+        model: m.id,
+        label: `${group.name}/${m.name}`,
+        efforts: m.reasoning?.efforts?.map((e) => ({ id: e.id, name: e.name })),
+      })
+    }
+  }
+
+  return {
+    current: value.current,
+    routable: value.routable,
+    options,
+  }
+}
+
+export async function selectSessionModel(
+  ctx: Context,
+  sessionId: string,
+  selection: { provider: string; model: string; reasoningEffort?: string },
+): Promise<{ provider: string; model: string; reasoningEffort?: string }> {
+  const api = (ctx as {
+    apiProxy?: { sessions?: { selectModel?: ApiFn } }
+  }).apiProxy
+  const raw = await call(api?.sessions?.selectModel, {
+    sessionId,
+    provider: selection.provider,
+    model: selection.model,
+    reasoningEffort: selection.reasoningEffort,
+  })
+  const value = unwrap<{ selected: { provider: string; model: string; reasoningEffort?: string } }>(raw)
+  if (!value?.selected) throw new Error('failed to select model')
+  return value.selected
+}
+
+export function formatModel(sel: { provider: string; model: string; reasoningEffort?: string }): string {
+  const base = `${sel.provider}/${sel.model}`
+  return sel.reasoningEffort ? `${base} (${sel.reasoningEffort})` : base
+}
diff --git a/tests/bridge.test.ts b/tests/bridge.test.ts
index df82686..3c8fcd6 100644
--- a/tests/bridge.test.ts
+++ b/tests/bridge.test.ts
@@ -65,6 +65,10 @@ function makeAgent(id: string, followups: UserMessage[], opts?: {
   }
 }
 
+function rpcOk<T>(value: T) {
+  return { rpcId: 'x', result: { ok: true as const, value } }
+}
+
 test('unauthorized user gets denied', async () => {
   const sent: SentMessage[] = []
   const ctx = {
@@ -108,7 +112,7 @@ test('plain text without bind prompts NEED_BIND and does not create', async () =
   assert.equal(sent[0]?.text, MSG.NEED_BIND)
 })
 
-test('/sessions with no live agents shows NO_LIVE', async () => {
+test('/sessions with no sessions shows NO_SESSIONS', async () => {
   const sent: SentMessage[] = []
   const ctx = {
     logger: { info() {}, warn() {}, error() {} },
@@ -123,10 +127,10 @@ test('/sessions with no live agents shows NO_LIVE', async () => {
     sleep: async () => {},
   })
   await bridge.processUpdate(messageUpdate(10, 1, '/sessions'))
-  assert.equal(sent[0]?.text, MSG.NO_LIVE)
+  assert.equal(sent[0]?.text, MSG.NO_SESSIONS)
 })
 
-test('/sessions lists live agents with bind callbacks', async () => {
+test('/sessions lists workspaces then sessions via callbacks', async () => {
   const sent: SentMessage[] = []
   const followups: UserMessage[] = []
   const agent = makeAgent('live-aaa', followups, {
@@ -150,11 +154,94 @@ test('/sessions lists live agents with bind callbacks', async () => {
     sleep: async () => {},
   })
   await bridge.processUpdate(messageUpdate(10, 1, '/sessions'))
-  assert.match(sent[0]!.text, /选择要遥控/)
-  assert.match(sent[0]!.text, /演示会话/)
-  assert.match(sent[0]!.text, /D:\/gitData\/demo-app/)
-  assert.match(sent[0]!.replyMarkup!.inline_keyboard![0]![0]!.text, /演示会话/)
-  assert.ok(sent[0]!.replyMarkup?.inline_keyboard?.[0]?.[0]?.callback_data?.startsWith(BIND_CB_PREFIX))
+  assert.match(sent[0]!.text, /选择工作区/)
+  assert.match(sent[0]!.text, /demo-app/)
+  assert.equal(sent[0]!.replyMarkup?.inline_keyboard?.[0]?.[0]?.callback_data, 'ws:0')
+
+  await bridge.processUpdate({
+    update_id: 2,
+    callback_query: {
+      id: 'cq-ws',
+      from: { id: 1 },
+      message: { message_id: 1, date: 0, chat: { id: 10, type: 'private' } },
+      data: 'ws:0',
+    },
+  })
+  const sessionMsg = sent.at(-1)!
+  assert.match(sessionMsg.text, /选择会话/)
+  assert.match(sessionMsg.text, /演示会话/)
+  assert.equal(sessionMsg.replyMarkup?.inline_keyboard?.[0]?.[0]?.callback_data, 'sid:0')
+})
+
+test('/sessions via apiProxy shows all workspaces excluding archived', async () => {
+  const sent: SentMessage[] = []
+  const ctx = {
+    logger: { info() {}, warn() {}, error() {} },
+    agents: { list: () => [], roots: () => [], get: () => undefined },
+    apiProxy: {
+      workspace: {
+        list: async () => rpcOk({
+          items: [
+            {
+              workspaceId: 'w1',
+              path: 'D:/a',
+              title: 'Alpha',
+              sessionIds: ['s1', 's-archived'],
+            },
+            {
+              workspaceId: 'w2',
+              path: 'D:/b',
+              title: 'Beta',
+              sessionIds: ['s2'],
+            },
+          ],
+          archivedSessionIds: ['s-archived'],
+        }),
+      },
+      sessions: {
+        list: async () => rpcOk({
+          items: [
+            {
+              sessionId: 's1',
+              updatedAt: 2,
+              running: true,
+              blank: false,
+              cwd: 'D:/a',
+              projections: { values: { title: '会话一' } },
+            },
+            {
+              sessionId: 's-archived',
+              updatedAt: 1,
+              running: false,
+              blank: false,
+              cwd: 'D:/a',
+              projections: { values: { title: '已归档' } },
+            },
+            {
+              sessionId: 's2',
+              updatedAt: 3,
+              running: false,
+              blank: false,
+              cwd: 'D:/b',
+              projections: { values: { title: '会话二' } },
+            },
+          ],
+        }),
+      },
+    },
+    on() { return () => {} },
+  }
+  const bridge = new TelegramBridge(ctx as any, {
+    token: 't',
+    allowedUserIds: [1],
+    allowAllUsers: false,
+    client: fakeClient(sent),
+    sleep: async () => {},
+  })
+  await bridge.processUpdate(messageUpdate(10, 1, '/sessions'))
+  assert.match(sent[0]!.text, /Alpha/)
+  assert.match(sent[0]!.text, /Beta/)
+  assert.equal(sent[0]!.replyMarkup?.inline_keyboard?.length, 2)
 })
 
 test('callback bind then plain text followups live agent; mirror assistant to chat', async () => {
@@ -215,6 +302,148 @@ test('callback bind then plain text followups live agent; mirror assistant to ch
   await bridge.stop()
 })
 
+test('cold session bind resumes then followups', async () => {
+  const sent: SentMessage[] = []
+  const followups: UserMessage[] = []
+  const agent = makeAgent('cold-1', followups, { cwd: 'D:/proj', title: '冷会话' })
+  let resumed = false
+  const ctx = {
+    logger: { info() {}, warn() {}, error() {} },
+    agents: {
+      list: () => [],
+      roots: () => [],
+      get: () => (resumed ? agent : undefined),
+      resume: async () => {
+        resumed = true
+        return { agent, dispose: async () => {} }
+      },
+    },
+    apiProxy: {
+      workspace: {
+        list: async () => rpcOk({
+          items: [{ workspaceId: 'w', path: 'D:/proj', title: 'proj', sessionIds: ['cold-1'] }],
+          archivedSessionIds: [],
+        }),
+      },
+      sessions: {
+        list: async () => rpcOk({
+          items: [{
+            sessionId: 'cold-1',
+            updatedAt: 1,
+            running: false,
+            blank: false,
+            cwd: 'D:/proj',
+            projections: { values: { title: '冷会话' } },
+          }],
+        }),
+      },
+    },
+    on() { return () => {} },
+  }
+  const bridge = new TelegramBridge(ctx as any, {
+    token: 't',
+    allowedUserIds: [1],
+    allowAllUsers: false,
+    client: fakeClient(sent),
+    sleep: async () => {},
+  })
+  await bridge.processUpdate(messageUpdate(10, 1, '/sessions'))
+  await bridge.processUpdate({
+    update_id: 2,
+    callback_query: {
+      id: 'cq-ws',
+      from: { id: 1 },
+      message: { message_id: 1, date: 0, chat: { id: 10, type: 'private' } },
+      data: 'ws:0',
+    },
+  })
+  await bridge.processUpdate({
+    update_id: 3,
+    callback_query: {
+      id: 'cq-sid',
+      from: { id: 1 },
+      message: { message_id: 2, date: 0, chat: { id: 10, type: 'private' } },
+      data: 'sid:0',
+    },
+  })
+  assert.equal(resumed, true)
+  assert.match(sent.at(-1)!.text, /已附着/)
+  await bridge.processUpdate(messageUpdate(10, 1, 'hi cold', 4))
+  assert.equal(followups.length, 1)
+})
+
+test('/model lists and selects via apiProxy', async () => {
+  const sent: SentMessage[] = []
+  const followups: UserMessage[] = []
+  const agent = makeAgent('live-mdl', followups)
+  let selected: unknown
+  const ctx = {
+    logger: { info() {}, warn() {}, error() {} },
+    agents: {
+      list: () => [agent],
+      roots: () => [agent],
+      get: () => agent,
+    },
+    apiProxy: {
+      sessions: {
+        models: async () => rpcOk({
+          current: { provider: 'deepseek', model: 'chat' },
+          routable: true,
+          groups: [{
+            id: 'deepseek',
+            name: 'DeepSeek',
+            models: [
+              { id: 'chat', name: 'Chat' },
+              { id: 'reasoner', name: 'Reasoner', reasoning: { efforts: [{ id: 'high', name: 'High' }] } },
+            ],
+          }],
+        }),
+        selectModel: async (req: { payload: unknown }) => {
+          selected = req.payload
+          return rpcOk({ selected: { provider: 'deepseek', model: 'chat' } })
+        },
+      },
+    },
+    on() { return () => {} },
+  }
+  const bridge = new TelegramBridge(ctx as any, {
+    token: 't',
+    allowedUserIds: [1],
+    allowAllUsers: false,
+    client: fakeClient(sent),
+    sleep: async () => {},
+  })
+  await bridge.processUpdate({
+    update_id: 1,
+    callback_query: {
+      id: 'bind',
+      from: { id: 1 },
+      message: { message_id: 1, date: 0, chat: { id: 10, type: 'private' } },
+      data: `${BIND_CB_PREFIX}live-mdl`,
+    },
+  })
+  await bridge.processUpdate(messageUpdate(10, 1, '/model', 2))
+  assert.match(sent.at(-1)!.text, /当前模型/)
+  assert.equal(sent.at(-1)!.replyMarkup?.inline_keyboard?.[0]?.[0]?.callback_data, 'mdl:0')
+
+  await bridge.processUpdate({
+    update_id: 3,
+    callback_query: {
+      id: 'pick',
+      from: { id: 1 },
+      message: { message_id: 2, date: 0, chat: { id: 10, type: 'private' } },
+      data: 'mdl:0',
+    },
+  })
+  assert.deepEqual(selected, {
+    sessionId: 'live-mdl',
+    provider: 'deepseek',
+    model: 'chat',
+    reasoningEffort: undefined,
+  })
+  assert.match(sent.at(-1)!.text, /已切换模型/)
+})
+
 test('/unbind clears binding without needing create/dispose', async () => {
   const sent: SentMessage[] = []
   const followups: UserMessage[] = []
diff --git a/tests/catalog.test.ts b/tests/catalog.test.ts
new file mode 100644
index 0000000..f49e437
--- /dev/null
+++ b/tests/catalog.test.ts
@@ -0,0 +1,28 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+import {
+  visibleSessionsForWorkspace,
+  workspacesWithVisibleSessions,
+  type CatalogSnapshot,
+} from '../src/catalog.ts'
+
+test('visible sessions exclude archived blank and subagent', () => {
+  const catalog: CatalogSnapshot = {
+    archivedIds: new Set(['arch']),
+    sessionsById: new Map([
+      ['ok', { sessionId: 'ok', title: 'OK', blank: false, running: true, updatedAt: 1 }],
+      ['arch', { sessionId: 'arch', title: 'Arch', blank: false, running: false, updatedAt: 1 }],
+      ['blank', { sessionId: 'blank', title: 'Blank', blank: true, running: false, updatedAt: 1 }],
+      ['sub', { sessionId: 'sub', title: 'Sub', blank: false, running: false, origin: 'subagent', updatedAt: 1 }],
+    ]),
+    workspaces: [{
+      id: 'w',
+      title: 'W',
+      path: '/w',
+      sessionIds: ['ok', 'arch', 'blank', 'sub', 'missing'],
+    }],
+  }
+  const rows = visibleSessionsForWorkspace(catalog, catalog.workspaces[0]!)
+  assert.deepEqual(rows.map((r) => r.sessionId), ['ok'])
+  assert.equal(workspacesWithVisibleSessions(catalog).length, 1)
+})
diff --git a/tests/commands.test.ts b/tests/commands.test.ts
index 9ff7b6c..242d460 100644
--- a/tests/commands.test.ts
+++ b/tests/commands.test.ts
@@ -10,6 +10,7 @@ test('parse slash commands for remote control', () => {
   assert.equal(parseCommand('/status').type, 'status')
   assert.equal(parseCommand('/unbind').type, 'unbind')
   assert.equal(parseCommand('/disconnect').type, 'unbind')
+  assert.equal(parseCommand('/model').type, 'model')
   assert.equal(parseCommand('/sessions@MyBot').type, 'sessions')
   assert.equal(parseCommand('/foo').type, 'unknown')
   assert.equal(parseCommand('hello').type, 'plain')
@@ -18,6 +19,7 @@ test('parse slash commands for remote control', () => {
 test('Chinese copy mentions sessions and bind', () => {
   assert.ok(MSG.DENIED.includes('权限') || MSG.DENIED.includes('授权'))
   assert.ok(MSG.HELP.includes('/sessions'))
+  assert.ok(MSG.HELP.includes('/model'))
   assert.ok(MSG.NEED_BIND.includes('/sessions'))
   assert.ok(MSG.WELCOME.includes('Web') || MSG.WELCOME.includes('遥控器'))
 })