yarnpkg/yarn

Choose this fork if you need classic Yarn 1.x with a small set of practical performance and reliability improvements. Do not choose it if you want active maintenance, broad feature growth, or a path toward newer Yarn capabilities.

Prefer this fork only if you need the old Esy-specific compiled-language workflow and can accept a frozen, highly diverged codebase. For general Yarn usage, upstream Yarn Berry or stock Yarn 1 is the safer choice.

Prefer this fork only if you need Yarn 1.x with a narrow manifest-bin safety fix and can tolerate a stale codebase. If you want ongoing maintenance or broader fixes, upstream or Yarn Berry is the better choice.

Prefer this fork only if you need its exact legacy behavior and local build workflow; otherwise upstream Yarn 1.x or Yarn Berry is the safer choice.

Prefer upstream over this fork unless you specifically need an older historical snapshot. This fork adds no visible functionality and is too stale to be a good default choice for new or ongoing installs.

Choose this fork only if you want the classic Yarn 1.x codebase in essentially upstream form. It offers no clear fork-specific advantage, so most users should treat it as equivalent to upstream 1.x rather than a differentiated distribution.

Prefer upstream Yarn 1.x only if you need an unchanged snapshot; otherwise this fork offers no clear advantages and is behind upstream, so it is a weak choice for adopters unless legacy pinning is the goal.

Choose this fork only if you specifically need an old, frozen Yarn 1.x snapshot. For most users, the lack of changes plus the stale state makes upstream or a more current maintained fork a better choice.

Prefer upstream Yarn 1.x over this fork unless you specifically need a dormant historical snapshot. It adds no visible value and appears behind on maintenance.