Discord plugin: channel notifications not delivered after initial session

Summary

The Discord plugin (v0.0.4) delivers real-time channel notifications (notifications/claude/channel) correctly in the first session after installation, but stops delivering them in all subsequent sessions (new or resumed).

Environment

• Claude Code: 2.1.92
• Discord plugin: 0.0.4 (claude-plugins-official)
• OS: macOS (Darwin 25.3.0, Apple Silicon)
• Shell: zsh, Terminal.app

What works

• MCP tools (fetch_messages, reply, react, etc.) work correctly
• Bot receives DMs (typing indicator appears in Discord)
• Pairing flow works (bot sends pairing codes)
• Manual fetch → reply workflow functions perfectly

What doesn't work

• notifications/claude/channel is not delivered to the Claude Code session after the initial session
• The bot calls sendTyping() (user sees "typing" in Discord) and mcp.notification() runs without error, but the notification never appears in the CLI session

Steps to reproduce

1. Install Discord plugin: claude plugins install discord@claude-plugins-official
2. Configure bot token via /discord:configure
3. DM the bot → pairing works → real-time notifications work in this session
4. Exit the session (/exit)
5. Start a new session (claude) → DM the bot → typing indicator appears but no notification is delivered to the session

What I've tried

• New sessions (claude, not --resume or -c)
• /reload-plugins
• Full plugin uninstall → reinstall
• Reset Discord bot token
• Delete ~/.claude/channels/discord/ and reconfigure from scratch
• Mac full reboot
• Verified single MCP server process (no duplicates)
• Confirmed access.json and .env are correct