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npm packages can now include signed provenance data from GitHub Actions

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Developers publishing packages to npm from GitHub Actions can now include signed provenance statements with a single flag. This feature creates a verifiable link between the published package and the specific GitHub commit and workflow that built it. Without provenance, there is no proof a package matches its advertised source code. The setup requires specific workflow permissions and a correctly configured repository URL. The result is a verified badge on the npm package page.

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