Telegram plugin: MCP channel notifications not received by Claude Code v2.1.81

Description

The Telegram plugin's MCP server correctly sends notifications/claude/channel after receiving inbound messages, but Claude Code does not display or process these notifications. Users cannot receive Telegram messages in their Claude Code session.

Environment

• Claude Code: 2.1.81
• OS: Linux (CentOS Stream 9)
• Bun: 1.3.11
• Telegram plugin: 0.0.1 (telegram@claude-plugins-official)

Steps to Reproduce

1. Configure the Telegram plugin (/telegram:configure <token>)
2. Approve a pairing (/telegram:access pair <code>)
3. Send a message to the bot from Telegram

Expected

Message appears as <channel source="telegram" ...> in the conversation.

Actual

Nothing appears. Message is silently consumed.

Debugging

• Bot token valid, MCP server running, bot receives messages
• gate() returns deliver for allowlisted sender
• mcp.notification() is called
• strace shows no write to stdout after mcp.notification() — SDK may be buffering or dropping
• Outbound tools (reply, react) work fine — only inbound notifications are broken