V0

V0 is a version label used in software development and related fields to denote a preliminary, experimental, or early release. The prefix 'v' commonly stands for 'version,' and the numeral '0' signals that the major version is zero, often indicating ongoing development or an API that is not yet stable.

In semantic versioning, zero-major releases (0.y.z) are treated as initial development; the public API and behavior may change between releases. Projects issuing v0 releases typically provide limited guarantees and may accompany them with milestones, migration notes, or a plan for stabilization before a 1.0.0 release.

V0 can also appear in build tags, packaging identifiers, or project milestones used in internal workflows to label prototypes or experimental builds. Because there is no universal standard for v0 tagging, its meaning can vary between teams and ecosystems.

As a project progresses, major version increments to 1.x.x or higher usually indicate a stable API and distributed compatibility guarantees, while ongoing minor or patch releases continue under that major version. The use of v0 signals early-stage status and the expectation of significant changes.