Last good version.

Last good version is the paid part: $5 a month. Every night, roll call notes the last version of each tool that passed all five checks. With a subscription, fieldtrip installs that one instead of the newest.

fieldtrip subscribe ftk_…   # once; the key comes after you pay
fieldtrip update            # moves your tools to their last good version

When an update breaks, you stay on the last good version and get an email saying what failed.
When a fixed version passes, you get another email, and fieldtrip update moves you onto it.

Two limits

• Railway comes through Homebrew, which always installs the newest, so fieldtrip can warn you but not hold it back.
• If a version that already passed fails one night, that isn't blamed on the tool. It's usually our test account or the company's servers.

What fieldtrip sends

Your subscription key and the names of the tools you set up. Never a tool's key.

Cancel any time from the Last good version page. fieldtrip unsubscribe forgets the key on this computer.