What is the purpose of Dependabot in software development?

Modern applications typically depend on dozens or hundreds of third-party packages, each of which can receive bug fixes, new features, or critical security patches independently of the application's own release cycle. Manually tracking every dependency's latest version and known vulnerabilities across a large codebase is tedious and easy to fall behind on — which is exactly the gap Dependabot fills.

Its purpose is twofold: reducing the manual effort of routine dependency maintenance (opening a PR the moment a newer version is available), and closing the security exposure window when a vulnerability is discovered in a dependency already in use, since outdated dependencies are one of the most common real-world attack vectors in modern software supply chains.

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