concurrent.cd
Tool / `karts up` clones a database from main's template into a per-branch micro-VM and claims the branch's migration numbers, so a second branch adding the same number is refused and told the next free one. Destructive migrations wait for `--allow-destructive`, and `karts down` destroys the VM and its database.

Karts

Every git branch boots in its own micro-VM with its own app, migrated and seeded database, and URL.

The summary describes what the project says it does; inclusion is not an endorsement.

Take

Claiming migration numbers at branch time is a small integration lease placed inside the isolation tool.

AI-drafted