Vercel has announced the addition of the vercel flags split command to the Vercel CLI. This update allows developers to configure weighted traffic splits directly for Vercel Flags without needing to use the web interface.
Key details
Previously, managing and splitting traffic for experimental versions required users to perform manual actions on the Vercel dashboard. According to the Vercel Blog announcement, the new feature optimizes developer workflows by integrating deeply into the familiar CLI environment. The new command supports both interactive mode and direct inputs for environment variables, bucketing attributes, and variant weights via flags.
Why it matters
With this improvement, engineering teams can easily implement techniques like A/B testing or canary deployments. Splitting traffic percentages among different variants can now be fully automated within CI/CD pipelines, minimizing risks when deploying new source code to production. For developers operating products on the Vercel platform, this tool provides more flexible traffic control without disrupting existing workflows.