# Migration

v3.x → v4.0.0 is a rebrand. All command names changed:
`/ultrabrief-local` → `/trekbrief`, `/ultraresearch-local` → `/trekresearch`,
`/ultraplan-local` → `/trekplan`, `/ultraexecute-local` → `/trekexecute`,
`/ultrareview-local` → `/trekreview`, `/ultracontinue-local` → `/trekcontinue`,
`/ultraplan-end-session-local` → `/trekendsession`. The plugin is now
named `voyage`. Re-fork from main if upgrading. There is no migration
path — see `GOVERNANCE.md` for the fork-and-own model.

Prior version migration notes (v1→v2, v2→v3) are preserved in
`CHANGELOG.md` only.