0.16.0

Released 2026-09-24

viv install refuses, with Composer's Problem wording and exit code 2, when the lock needs a PHP version, extension or library the detected platform lacks, before anything is written; config.platform, --ignore-platform-reqs and --ignore-platform-req are honoured. The verdict is cached in the store so an unchanged project costs one stat and one small read; with no php on PATH the check is skipped (#300)
--ignore-platform-reqs and --ignore-platform-req=<name> now reach the solve in update, require and remove, so a package pinned to a PHP this machine lacks resolves as it does in Composer (#242)
Top-level "type": "path" repositories: a glob or plain relative url, options.symlink, options.versions, the git-guessed version, dist.reference and transport-options as Composer writes them (#305)
self.version in the root composer.json's own require and require-dev resolves to the root's version, in both the first solve and the dev-split second solve (#304)

Warm viv install -o on bench/laravel from 78 ms to 53 ms: the root package's classmap scan is cached by directory fingerprint (#269), the classmap merge and autoload render allocate less (#302), and each archive's classmap sidecar is stored in its final key form (#303). Link concurrency was measured at the syscall floor and left alone (#270)
Composer's platform Problem wording for php, ext-* and lib-* requirements is now reproduced exactly, including the "your php version (x) does not satisfy" case a present-but-mismatched platform package used to skip

Chapter 3, workspaces, closed as measured and not pursued: on every corpus repository whose members are installed alone, standalone and aggregate solves agree (#279); four candidate chapters and an rspack prior-art note written up
CI per push from 5.4 min to a 4.4 min median, with macOS in three offline partitions and optimised dependencies in the dev profile (#195)