--target defaulted to "latest", and since 2026-10-26 Stalwart's latest
release is 1.0.0. With default flags, preflight then planned 0.16.x -> 1.0.0
as a same-boundary patch upgrade (the binary swapped in over a 0.16 store,
which 1.0 can't read) and 0.15.5 -> 1.0.0 as an ordinary 0.16 migration.
preflight's upgrade-direction check and plan.Decide now refuse any target at
1.0 or later, naming 0.16.27, until the route in docs/design-1.0.md is
built. --target defaults to 0.16.27, the last 0.16 release, in preflight,
rehearse and run. The test that pinned 0.15.x -> 1.0.0 as accepted is
rewritten to pin the refusal, and a new preflight test covers "latest"
resolving to v1.0.0.
jcoffey-dev
ae5dd5f4a3