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/README.md

@@ -55,9 +55,7 @@ Install the plugin:
 /discord:configure MTIz...
 ```
 
-Writes `DISCORD_BOT_TOKEN=...` to `~/.claude/channels/discord/.env`. You can also write that file by hand, or set the variable in your shell environment — shell takes precedence.
-
-> To run multiple bots on one machine (different tokens, separate allowlists), point `DISCORD_STATE_DIR` at a different directory per instance.
+Writes `DISCORD_BOT_TOKEN=...` to `.claude/channels/discord/.env` in your project. You can also write that file by hand, or set the variable in your shell environment — shell takes precedence.
 
 **6. Relaunch with the channel flag.**
 

external_plugins/discord/server.ts

@@ -29,7 +29,7 @@ import { readFileSync, writeFileSync, mkdirSync, readdirSync, rmSync, statSync,
 import { homedir } from 'os'
 import { join, sep } from 'path'
 
-const STATE_DIR = process.env.DISCORD_STATE_DIR ?? join(homedir(), '.claude', 'channels', 'discord')
+const STATE_DIR = join(homedir(), '.claude', 'channels', 'discord')
 const ACCESS_FILE = join(STATE_DIR, 'access.json')
 const APPROVED_DIR = join(STATE_DIR, 'approved')
 const ENV_FILE = join(STATE_DIR, '.env')

external_plugins/telegram/README.md

@@ -35,9 +35,7 @@ Install the plugin:
 /telegram:configure 123456789:AAHfiqksKZ8...
 ```
 
-Writes `TELEGRAM_BOT_TOKEN=...` to `~/.claude/channels/telegram/.env`. You can also write that file by hand, or set the variable in your shell environment — shell takes precedence.
-
-> To run multiple bots on one machine (different tokens, separate allowlists), point `TELEGRAM_STATE_DIR` at a different directory per instance.
+Writes `TELEGRAM_BOT_TOKEN=...` to `.claude/channels/telegram/.env` in your project. You can also write that file by hand, or set the variable in your shell environment — shell takes precedence.
 
 **4. Relaunch with the channel flag.**
 

external_plugins/telegram/server.ts

@@ -22,7 +22,7 @@ import { readFileSync, writeFileSync, mkdirSync, readdirSync, rmSync, statSync,
 import { homedir } from 'os'
 import { join, extname, sep } from 'path'
 
-const STATE_DIR = process.env.TELEGRAM_STATE_DIR ?? join(homedir(), '.claude', 'channels', 'telegram')
+const STATE_DIR = join(homedir(), '.claude', 'channels', 'telegram')
 const ACCESS_FILE = join(STATE_DIR, 'access.json')
 const APPROVED_DIR = join(STATE_DIR, 'approved')
 const ENV_FILE = join(STATE_DIR, '.env')
@@ -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)
 })