Watch background tasks with the Monitor tool
The Monitor tool replaces the old `/loop` workaround — Claude streams stdout from a background process and only spends tokens when an error appears.
- Type: Prompt
- Tags: Coding Agent Hacks, Intermediate, Claude Code
- Updated: 2026-10-01
Prompt
The Monitor tool replaces the old `/loop` workaround — Claude streams stdout from a background process and only spends tokens when an error appears. Tracking background tasks used to mean running `/loop` over and over to check for errors, burning API calls. Claude Code PM Noah Zweben replaced that pattern with a built-in Monitor tool. A single prompt starts your dev server and watches stdout — zero tokens while everything is healthy, instant intervention when a stack trace shows up. Implementation example: Start my dev server and use the Monitor tool to watch for errors.
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