feat(adapters): add /new <project> quick switch and unify project selection

- Add matchProject() to http-client for fuzzy project matching by
  index or name
- Extract startNewSession() in both adapters to share reset + match +
  create logic
- Project selection replies now go through startNewSession(), creating
  a clean new session instead of continuing the old one
- Support: /new 2 (by index), /new backend (by name), /new (default)
- Add usage hint in /projects list output

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

adapters/common/http-client.ts

@@ -41,4 +41,34 @@ export class AdapterHttpClient {
     const data = (await res.json()) as { projects: RecentProject[] }
     return data.projects
   }
+
+  /**
+   * Match a project by index (1-based) or fuzzy name from recent projects.
+   * Returns { project, ambiguous[] } — ambiguous is set when multiple projects match.
+   */
+  async matchProject(query: string): Promise<{ project?: RecentProject; ambiguous?: RecentProject[] }> {
+    const projects = await this.listRecentProjects()
+
+    // Try as 1-based index
+    const num = parseInt(query, 10)
+    if (!isNaN(num) && num >= 1 && num <= projects.length && String(num) === query.trim()) {
+      return { project: projects[num - 1] }
+    }
+
+    const q = query.toLowerCase()
+
+    // Exact project name match
+    const exact = projects.find(p => p.projectName.toLowerCase() === q)
+    if (exact) return { project: exact }
+
+    // Fuzzy: name or path contains query
+    const matches = projects.filter(p =>
+      p.projectName.toLowerCase().includes(q) ||
+      p.realPath.toLowerCase().includes(q)
+    )
+    if (matches.length === 1) return { project: matches[0] }
+    if (matches.length > 1) return { ambiguous: matches }
+
+    return {}
+  }
 }

adapters/feishu/index.ts

@@ -252,12 +252,54 @@ async function showProjectPicker(chatId: string): Promise<void> {
       `${i + 1}. **${p.projectName}**${p.branch ? ` (${p.branch})` : ''}\n   ${p.realPath}`
     )
     pendingProjectSelection.set(chatId, true)
-    await sendText(chatId, `选择项目（回复编号）：\n\n${lines.join('\n\n')}`)
+    await sendText(chatId, `选择项目（回复编号）：\n\n${lines.join('\n\n')}\n\n💡 下次可直接 /new <编号或名称> 快速新建会话`)
   } catch (err) {
     await sendText(chatId, `❌ 无法获取项目列表: ${err instanceof Error ? err.message : String(err)}`)
   }
 }
 
+async function startNewSession(chatId: string, query?: string): Promise<void> {
+  bridge.resetSession(chatId)
+  sessionStore.delete(chatId)
+  chatStates.delete(chatId)
+  accumulatedText.delete(chatId)
+  buffers.get(chatId)?.reset()
+  buffers.delete(chatId)
+  pendingProjectSelection.delete(chatId)
+
+  if (query) {
+    try {
+      const { project, ambiguous } = await httpClient.matchProject(query)
+      if (project) {
+        const ok = await createSessionForChat(chatId, project.realPath)
+        if (ok) {
+          await sendText(chatId,
+            `✅ 已新建会话：**${project.projectName}**${project.branch ? ` (${project.branch})` : ''}`)
+        }
+        return
+      }
+      if (ambiguous) {
+        const list = ambiguous.map((p, i) => `${i + 1}. **${p.projectName}** — ${p.realPath}`).join('\n')
+        await sendText(chatId, `匹配到多个项目，请更精确：\n\n${list}`)
+        return
+      }
+      await sendText(chatId, `未找到匹配 "${query}" 的项目。发送 /projects 查看完整列表。`)
+    } catch (err) {
+      await sendText(chatId, `❌ ${err instanceof Error ? err.message : String(err)}`)
+    }
+  } else {
+    const workDir = config.defaultProjectDir
+    if (workDir) {
+      const ok = await createSessionForChat(chatId, workDir)
+      if (ok) {
+        await sendText(chatId, '✅ 已新建会话，可以开始对话了。')
+      }
+    } else {
+      await showProjectPicker(chatId)
+    }
+  }
+}
+
 // ---------- server message handler ----------
 
 async function handleServerMessage(chatId: string, msg: ServerMessage): Promise<void> {
@@ -436,24 +478,9 @@ async function handleMessage(data: any): Promise<void> {
   if (!text) return
 
   // Handle commands
-  if (text === '/new' || text === '新会话') {
-    bridge.resetSession(chatId)
-    sessionStore.delete(chatId)
-    chatStates.delete(chatId)
-    accumulatedText.delete(chatId)
-    buffers.get(chatId)?.reset()
-    buffers.delete(chatId)
-    pendingProjectSelection.delete(chatId)
-
-    const workDir = config.defaultProjectDir
-    if (workDir) {
-      const ok = await createSessionForChat(chatId, workDir)
-      if (ok) {
-        await sendText(chatId, '✅ 已新建会话，可以开始对话了。')
-      }
-    } else {
-      await showProjectPicker(chatId)
-    }
+  if (text === '/new' || text === '新会话' || text.startsWith('/new ')) {
+    const arg = text.startsWith('/new ') ? text.slice(5).trim() : ''
+    await startNewSession(chatId, arg || undefined)
     return
   }
   if (text === '/stop' || text === '停止') {
@@ -468,20 +495,7 @@ async function handleMessage(data: any): Promise<void> {
 
   // Check if user is responding to project selection
   if (pendingProjectSelection.has(chatId)) {
-    const num = parseInt(text, 10)
-    if (num >= 1) {
-      try {
-        const projects = await httpClient.listRecentProjects()
-        const selected = projects[num - 1]
-        if (selected) {
-          pendingProjectSelection.delete(chatId)
-          await createSessionForChat(chatId, selected.realPath)
-          await sendText(chatId, `✅ 已选择 **${selected.projectName}**。现在可以开始对话了。`)
-          return
-        }
-      } catch { /* fall through */ }
-    }
-    await sendText(chatId, '请输入有效的编号。')
+    await startNewSession(chatId, text.trim())
     return
   }
 

adapters/telegram/index.ts

@@ -147,7 +147,7 @@ async function showProjectPicker(chatId: string): Promise<void> {
     )
     pendingProjectSelection.set(chatId, true)
     await bot.api.sendMessage(numericChatId,
-      `选择项目（回复编号）：\n\n${lines.join('\n\n')}`)
+      `选择项目（回复编号）：\n\n${lines.join('\n\n')}\n\n💡 下次可直接 /new <编号或名称> 快速新建会话`)
   } catch (err) {
     await bot.api.sendMessage(numericChatId,
       `❌ 无法获取项目列表: ${err instanceof Error ? err.message : String(err)}`)
@@ -266,14 +266,19 @@ bot.command('start', (ctx) => {
   ctx.reply(
     '👋 Claude Code Bot 已就绪。\n\n' +
     '命令:\n' +
-    '/projects — 选择/切换项目\n' +
-    '/new — 新建会话\n' +
+    '/new — 新建会话（使用默认项目）\n' +
+    '/new <名称或编号> — 新建会话并指定项目\n' +
+    '/projects — 查看项目列表\n' +
     '/stop — 停止生成'
   )
 })
 
-bot.command('new', async (ctx) => {
-  const chatId = String(ctx.chat.id)
+/** Reset session state and start a new session for chatId.
+ *  If `query` is provided, match a project by index or name;
+ *  otherwise use defaultProjectDir or show the picker. */
+async function startNewSession(chatId: string, query?: string): Promise<void> {
+  const numericChatId = Number(chatId)
+
   bridge.resetSession(chatId)
   sessionStore.delete(chatId)
   placeholders.delete(chatId)
@@ -282,15 +287,43 @@ bot.command('new', async (ctx) => {
   buffers.delete(chatId)
   pendingProjectSelection.delete(chatId)
 
-  const workDir = config.defaultProjectDir
-  if (workDir) {
-    const ok = await createSessionForChat(chatId, workDir)
-    if (ok) {
-      await bot.api.sendMessage(Number(chatId), '✅ 已新建会话，可以开始对话了。')
+  if (query) {
+    try {
+      const { project, ambiguous } = await httpClient.matchProject(query)
+      if (project) {
+        const ok = await createSessionForChat(chatId, project.realPath)
+        if (ok) {
+          await bot.api.sendMessage(numericChatId,
+            `✅ 已新建会话：${project.projectName}${project.branch ? ` (${project.branch})` : ''}`)
+        }
+        return
+      }
+      if (ambiguous) {
+        const list = ambiguous.map((p, i) => `${i + 1}. ${p.projectName} — ${p.realPath}`).join('\n')
+        await bot.api.sendMessage(numericChatId, `匹配到多个项目，请更精确：\n\n${list}`)
+        return
+      }
+      await bot.api.sendMessage(numericChatId, `未找到匹配 "${query}" 的项目。发送 /projects 查看完整列表。`)
+    } catch (err) {
+      await bot.api.sendMessage(numericChatId,
+        `❌ ${err instanceof Error ? err.message : String(err)}`)
     }
   } else {
-    await showProjectPicker(chatId)
+    const workDir = config.defaultProjectDir
+    if (workDir) {
+      const ok = await createSessionForChat(chatId, workDir)
+      if (ok) {
+        await bot.api.sendMessage(numericChatId, '✅ 已新建会话，可以开始对话了。')
+      }
+    } else {
+      await showProjectPicker(chatId)
+    }
   }
+}
+
+bot.command('new', async (ctx) => {
+  const chatId = String(ctx.chat.id)
+  await startNewSession(chatId, ctx.match?.trim() || undefined)
 })
 
 bot.command('projects', async (ctx) => {
@@ -330,23 +363,9 @@ bot.on('message:text', (ctx) => {
   }
 
   enqueue(chatId, async () => {
-    // Check if user is responding to project selection
+    // Project selection pending — treat input as /new <query>
     if (pendingProjectSelection.has(chatId)) {
-      const num = parseInt(text, 10)
-      if (num >= 1) {
-        try {
-          const projects = await httpClient.listRecentProjects()
-          const selected = projects[num - 1]
-          if (selected) {
-            pendingProjectSelection.delete(chatId)
-            await createSessionForChat(chatId, selected.realPath)
-            await bot.api.sendMessage(Number(chatId),
-              `✅ 已选择 ${selected.projectName}。现在可以开始对话了。`)
-            return
-          }
-        } catch { /* fall through */ }
-      }
-      await bot.api.sendMessage(Number(chatId), '请输入有效的编号。')
+      await startNewSession(chatId, text.trim())
       return
     }