fastmod

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Use fastmod to make mass code updates to avoid many repetitive changes.

pydantic By pydantic schedule Updated 12/20/2025

name: fastmod description: Use fastmod to make mass code updates to avoid many repetitive changes.

fastmod

Instructions

You can occasionally use fastmod or sed to make mass updates to the codebase and avoid wasting tokens changing each case one at a time.

Before making many repetitive changes to the codebase, consider using fastmod --accept-all.

THINK HARD about how best to use fastmod as it can dramatically improve your productivity.

Examples

Example of switching the py_type function to use impl ResourceTracker instead of T: ResourceTracker:

fastmod --accept-all 'fn py_type<T: ResourceTracker>(\(.+?)<T>' 'fn py_type$1<impl ResourceTracker>'
Install via CLI
npx skills add https://github.com/pydantic/monty --skill fastmod
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