telegram: exit when Claude Code closes the connection

When the MCP stdio transport closes, the bot kept polling Telegram as
a zombie process — holding the token and causing 409 Conflict for the
next session.

- Listen for stdin end/close and SIGTERM/SIGINT -> bot.stop() + exit
- Force-exit after 2s if bot.stop() stalls on the long-poll timeout
- unref the approval-check interval so it doesn't keep us alive

Fixes #793, partial #788 (issue 3)

external_plugins/discord/server.ts

@@ -58,15 +58,6 @@ if (!TOKEN) {
 }
 const INBOX_DIR = join(STATE_DIR, 'inbox')
 
-// Last-resort safety net — without these the process dies silently on any
-// unhandled promise rejection. With them it logs and keeps serving tools.
-process.on('unhandledRejection', err => {
-  process.stderr.write(`discord channel: unhandled rejection: ${err}\n`)
-})
-process.on('uncaughtException', err => {
-  process.stderr.write(`discord channel: uncaught exception: ${err}\n`)
-})
-
 const client = new Client({
   intents: [
     GatewayIntentBits.DirectMessages,
@@ -351,7 +342,7 @@ function checkApprovals(): void {
   }
 }
 
-if (!STATIC) setInterval(checkApprovals, 5000).unref()
+if (!STATIC) setInterval(checkApprovals, 5000)
 
 // Discord caps messages at 2000 chars (hard limit — larger sends reject).
 // Split long replies, preferring paragraph boundaries when chunkMode is
@@ -646,25 +637,6 @@ mcp.setRequestHandler(CallToolRequestSchema, async req => {
 
 await mcp.connect(new StdioServerTransport())
 
-// When Claude Code closes the MCP connection, stdin gets EOF. Without this
-// the gateway stays connected as a zombie holding resources.
-let shuttingDown = false
-function shutdown(): void {
-  if (shuttingDown) return
-  shuttingDown = true
-  process.stderr.write('discord channel: shutting down\n')
-  setTimeout(() => process.exit(0), 2000)
-  void Promise.resolve(client.destroy()).finally(() => process.exit(0))
-}
-process.stdin.on('end', shutdown)
-process.stdin.on('close', shutdown)
-process.on('SIGTERM', shutdown)
-process.on('SIGINT', shutdown)
-
-client.on('error', err => {
-  process.stderr.write(`discord channel: client error: ${err}\n`)
-})
-
 client.on('messageCreate', msg => {
   if (msg.author.bot) return
   handleInbound(msg).catch(e => process.stderr.write(`discord: handleInbound failed: ${e}\n`))
@@ -713,7 +685,7 @@ async function handleInbound(msg: Message): Promise<void> {
   // forgeable by any allowlisted sender typing that string.
   const content = msg.content || (atts.length > 0 ? '(attachment)' : '')
 
-  mcp.notification({
+  void mcp.notification({
     method: 'notifications/claude/channel',
     params: {
       content,
@@ -726,8 +698,6 @@ async function handleInbound(msg: Message): Promise<void> {
         ...(atts.length > 0 ? { attachment_count: String(atts.length), attachments: atts.join('; ') } : {}),
       },
     },
-  }).catch(err => {
-    process.stderr.write(`discord channel: failed to deliver inbound to Claude: ${err}\n`)
   })
 }
 
@@ -735,7 +705,4 @@ client.once('ready', c => {
   process.stderr.write(`discord channel: gateway connected as ${c.user.tag}\n`)
 })
 
-client.login(TOKEN).catch(err => {
-  process.stderr.write(`discord channel: login failed: ${err}\n`)
-  process.exit(1)
-})
+await client.login(TOKEN)

external_plugins/telegram/server.ts

@@ -304,7 +304,7 @@ function checkApprovals(): void {
   }
 }
 
-if (!STATIC) setInterval(checkApprovals, 5000)
+if (!STATIC) setInterval(checkApprovals, 5000).unref()
 
 // Telegram caps messages at 4096 chars. Split long replies, preferring
 // paragraph boundaries when chunkMode is 'newline'.
@@ -507,6 +507,24 @@ mcp.setRequestHandler(CallToolRequestSchema, async req => {
 
 await mcp.connect(new StdioServerTransport())
 
+// When Claude Code closes the MCP connection, stdin gets EOF. Without this
+// the bot keeps polling forever as a zombie, holding the token and blocking
+// the next session with 409 Conflict.
+let shuttingDown = false
+function shutdown(): void {
+  if (shuttingDown) return
+  shuttingDown = true
+  process.stderr.write('telegram channel: shutting down\n')
+  // bot.stop() signals the poll loop to end; the current getUpdates request
+  // may take up to its long-poll timeout to return. Force-exit after 2s.
+  setTimeout(() => process.exit(0), 2000)
+  void Promise.resolve(bot.stop()).finally(() => process.exit(0))
+}
+process.stdin.on('end', shutdown)
+process.stdin.on('close', shutdown)
+process.on('SIGTERM', shutdown)
+process.on('SIGINT', shutdown)
+
 bot.on('message:text', async ctx => {
   await handleInbound(ctx, ctx.message.text, undefined)
 })