Claude Code v2.1.79 → v2.1.80: Channels enable MCP message pushing

[claude-yolo]

WHY THIS MATTERS: Channels let MCP servers push events into running sessions (research preview), plus better rate limit visibility

Key features:

• 🔄 --channels - MCP servers can push messages into sessions
• 📊 Rate limits in statusline - shows 5hr/7day usage windows
• 🔌 Plugin marketplace source: 'settings' - inline plugin entries
• ⚡ effort frontmatter for skills/slash commands
• 🔧 Various fixes: resume parallel tools, voice WebSocket, API proxy streaming

From: https://github.com/anthropics/claude-code-docs/pull/776

@lroolle FYI - research preview channels feature landed