Channels 参考

#!/usr/bin/env bun
import { Server } from '@modelcontextprotocol/sdk/server/index.js'
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'
import { ListToolsRequestSchema, CallToolRequestSchema } from '@modelcontextprotocol/sdk/types.js'

// --- 出站：写入 /events 上的任何 curl -N 侦听器 ---
// 真实的桥接会改为 POST 到您的聊天平台。
const listeners = new Set<(chunk: string) => void>()
function send(text: string) {
  const chunk = text.split('\n').map(l => `data: ${l}\n`).join('') + '\n'
  for (const emit of listeners) emit(chunk)
}

const mcp = new Server(
  { name: 'webhook', version: '0.0.1' },
  {
    capabilities: {
      experimental: { 'claude/channel': {} },
      tools: {},
    },
    instructions: 'Messages arrive as <channel source="webhook" chat_id="...">. Reply with the reply tool, passing the chat_id from the tag.',
  },
)

mcp.setRequestHandler(ListToolsRequestSchema, async () => ({
  tools: [{
    name: 'reply',
    description: 'Send a message back over this channel',
    inputSchema: {
      type: 'object',
      properties: {
        chat_id: { type: 'string', description: 'The conversation to reply in' },
        text: { type: 'string', description: 'The message to send' },
      },
      required: ['chat_id', 'text'],
    },
  }],
}))

mcp.setRequestHandler(CallToolRequestSchema, async req => {
  if (req.params.name === 'reply') {
    const { chat_id, text } = req.params.arguments as { chat_id: string; text: string }
    send(`Reply to ${chat_id}: ${text}`)
    return { content: [{ type: 'text', text: 'sent' }] }
  }
  throw new Error(`unknown tool: ${req.params.name}`)
})

await mcp.connect(new StdioServerTransport())

let nextId = 1
Bun.serve({
  port: 8788,
  hostname: '127.0.0.1',
  idleTimeout: 0,  // 不要关闭空闲 SSE 流
  async fetch(req) {
    const url = new URL(req.url)

    // GET /events：SSE 流，以便 curl -N 可以实时观看 Claude 的回复
    if (req.method === 'GET' && url.pathname === '/events') {
      const stream = new ReadableStream({
        start(ctrl) {
          ctrl.enqueue(': connected\n\n')  // 所以 curl 立即显示一些内容
          const emit = (chunk: string) => ctrl.enqueue(chunk)
          listeners.add(emit)
          req.signal.addEventListener('abort', () => listeners.delete(emit))
        },
      })
      return new Response(stream, {
        headers: { 'Content-Type': 'text/event-stream', 'Cache-Control': 'no-cache' },
      })
    }

    // POST：作为频道事件转发给 Claude
    const body = await req.text()
    const chat_id = String(nextId++)
    await mcp.notification({
      method: 'notifications/claude/channel',
      params: {
        content: body,
        meta: { chat_id, path: url.pathname, method: req.method },
      },
    })
    return new Response('ok')
  },
})

#!/usr/bin/env bun
import { Server } from '@modelcontextprotocol/sdk/server/index.js'
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'
import { ListToolsRequestSchema, CallToolRequestSchema } from '@modelcontextprotocol/sdk/types.js'
import { z } from 'zod'

// --- 出站：写入 /events 上的任何 curl -N 侦听器 ---
// 真实的桥接会改为 POST 到您的聊天平台。
const listeners = new Set<(chunk: string) => void>()
function send(text: string) {
  const chunk = text.split('\n').map(l => `data: ${l}\n`).join('') + '\n'
  for (const emit of listeners) emit(chunk)
}

// 发送者允许列表。对于本地演练，我们信任单个 X-Sender
// 标头值 "dev"；真实的桥接会检查平台的用户 ID。
const allowed = new Set(['dev'])

const mcp = new Server(
  { name: 'webhook', version: '0.0.1' },
  {
    capabilities: {
      experimental: {
        'claude/channel': {},
        'claude/channel/permission': {},  // 选择加入权限中继
      },
      tools: {},
    },
    instructions:
      'Messages arrive as <channel source="webhook" chat_id="...">. ' +
      'Reply with the reply tool, passing the chat_id from the tag.',
  },
)

// --- 回复工具：Claude 调用此项以发送消息回复 ---
mcp.setRequestHandler(ListToolsRequestSchema, async () => ({
  tools: [{
    name: 'reply',
    description: 'Send a message back over this channel',
    inputSchema: {
      type: 'object',
      properties: {
        chat_id: { type: 'string', description: 'The conversation to reply in' },
        text: { type: 'string', description: 'The message to send' },
      },
      required: ['chat_id', 'text'],
    },
  }],
}))

mcp.setRequestHandler(CallToolRequestSchema, async req => {
  if (req.params.name === 'reply') {
    const { chat_id, text } = req.params.arguments as { chat_id: string; text: string }
    send(`Reply to ${chat_id}: ${text}`)
    return { content: [{ type: 'text', text: 'sent' }] }
  }
  throw new Error(`unknown tool: ${req.params.name}`)
})

// --- 权限中继：当对话打开时，Claude Code（不是 Claude）调用此项
const PermissionRequestSchema = z.object({
  method: z.literal('notifications/claude/channel/permission_request'),
  params: z.object({
    request_id: z.string(),
    tool_name: z.string(),
    description: z.string(),
    input_preview: z.string(),
  }),
})

mcp.setNotificationHandler(PermissionRequestSchema, async ({ params }) => {
  send(
    `Claude wants to run ${params.tool_name}: ${params.description}\n\n` +
    `Reply "yes ${params.request_id}" or "no ${params.request_id}"`,
  )
})

await mcp.connect(new StdioServerTransport())

// --- HTTP on :8788：GET /events 流出站，POST 路由入站 ---
const PERMISSION_REPLY_RE = /^\s*(y|yes|n|no)\s+([a-km-z]{5})\s*$/i
let nextId = 1

Bun.serve({
  port: 8788,
  hostname: '127.0.0.1',
  idleTimeout: 0,  // 不要关闭空闲 SSE 流
  async fetch(req) {
    const url = new URL(req.url)

    // GET /events：SSE 流，以便 curl -N 可以实时观看回复和提示
    if (req.method === 'GET' && url.pathname === '/events') {
      const stream = new ReadableStream({
        start(ctrl) {
          ctrl.enqueue(': connected\n\n')  // 所以 curl 立即显示一些内容
          const emit = (chunk: string) => ctrl.enqueue(chunk)
          listeners.add(emit)
          req.signal.addEventListener('abort', () => listeners.delete(emit))
        },
      })
      return new Response(stream, {
        headers: { 'Content-Type': 'text/event-stream', 'Cache-Control': 'no-cache' },
      })
    }

    // 其他一切都是入站：首先根据发送者进行门控
    const body = await req.text()
    const sender = req.headers.get('X-Sender') ?? ''
    if (!allowed.has(sender)) return new Response('forbidden', { status: 403 })

    // 在将其视为聊天之前检查判决格式
    const m = PERMISSION_REPLY_RE.exec(body)
    if (m) {
      await mcp.notification({
        method: 'notifications/claude/channel/permission',
        params: {
          request_id: m[2].toLowerCase(),
          behavior: m[1].toLowerCase().startsWith('y') ? 'allow' : 'deny',
        },
      })
      return new Response('verdict recorded')
    }

    // 正常聊天：作为频道事件转发给 Claude
    const chat_id = String(nextId++)
    await mcp.notification({
      method: 'notifications/claude/channel',
      params: { content: body, meta: { chat_id, path: url.pathname } },
    })
    return new Response('ok')
  },
})