You've encountered an interesting behavior difference between turbo run lint and turbo watch lint when it comes to detecting changes in your root-level eslint.config.mjs file.

The Problem

• turbo run lint correctly cache misses when eslint.config.mjs changes
• turbo watch lint doesn't rerun when eslint.config.mjs changes, despite it being in the inputs array
• Moving the file to globalDependencies fixes the issue for turbo watch

Why This Happens

This appears to be related to how turbo watch handles task-level inputs versus global dependencies. The watcher functionality might not be correctly processing the $TURBO_ROOT$ path prefix in the inputs array.

Solutions

1. Use globalDependencies (Recommended)

Since you've already found this solution works, this is the most straightforward approach:

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{
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  "globalDependencies": ["eslint.config.mjs"],
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  "tasks": {
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    "lint": {
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      "outputs": [],
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      "inputs": ["$TURBO_DEFAULT$"]
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    }
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  }
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}