Manage Vercel Flags segments with Vercel CLI

Vercel Flags segments can now be managed from the Vercel CLI with the new vercel flags segments command.

A segment is the targeting primitive a flag uses to decide who sees what. Membership composes from three repeatable tokens: include:, exclude:, and rule:. Pass them to --add or --remove for incremental edits. For full replacement, --data takes the entire segment definition as raw JSON.

# Create a segment and seed it with specific users
vercel flags segments create beta-users \
  --label "Beta users" \
  --add include:user.id=user_123 \
  --add include:user.id=user_456
# Add a rule-based condition and remove a specific user
vercel flags segments update beta-users \
  --add rule:user.plan:eq:enterprise \
  --remove include:user.id=user_123

All segment commands support --json output, making them scriptable from CI, local workflows, and agent-driven pipelines that need to inspect or update flag targeting from the terminal.

Update to the latest version of the Vercel CLI and learn more in the Vercel Flags CLI documentation to get started.