MCP inbound notifications not reaching Claude Code session (Discord & Telegram)

Summary

MCP plugin notifications (notifications/claude/channel) are not being delivered to the Claude Code session. This affects both the Discord and Telegram channel plugins — identical symptom on both.

What works

• Bot process runs correctly (confirmed via logs)
• Bot receives inbound messages from users ✅
• fetch_messages tool reads messages successfully ✅
• reply tool sends responses back to users ✅
• gate() / allowlist authorization passes ✅
• Bot shows typing indicator in Discord ✅

What doesn't work

• mcp.notification("notifications/claude/channel") never reaches the Claude Code session ❌
• No inbound message prompt appears in Claude Code when a user sends a DM
• This is consistent across both Discord and Telegram plugins — same notification path, same failure

Environment

• macOS (Darwin 25.2.0)
• Claude Code CLI (latest)
• Discord plugin: cache/discord/0.0.4
• Telegram plugin: also configured and exhibiting the same behavior

Steps to reproduce

1. Configure Discord (or Telegram) bot with token, pairing, and allowlist
2. Start Claude Code session
3. Send a DM to the bot from Discord
4. Bot receives the message (visible via fetch_messages), but Claude Code session is never notified

Expected behavior

Inbound messages should trigger a notification in the active Claude Code session so the assistant can respond automatically.

Workaround

Manual polling via fetch_messages + reply works, but defeats the purpose of real-time inbound message handling.