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Offline VM intelligence.

Score boot readiness before power-on, repair disks offline, and certify cutover with a signed Passport — no appliance daemon, no "just try it and hope." GuestKit reads the disk while the guest is off and emits a reviewable fix plan.

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The cutover problem — solved offline

Every hypervisor exit fails the same way: you discover the disk was broken at 2am, in the cutover window, after power-on. GuestKit reads the disk while the guest is off, scores first-boot probability 0–100, and emits a reviewable fix plan.

It's the first step in a suite: certify with GuestKit, run & manage with FluxVM, convert & deploy with h2kvm. GuestKit itself stays focused on offline intelligence — it doesn't own production networking or disposable fleet lifecycle.

Doctor: boot-readiness scoring

Score first-boot probability 0–100 with a root-cause chain, offline — before you ever power on the guest. Works against qcow2, vmdk, vhdx, vhd, vdi, and raw.

Migrate-plan + CI gate

A structured, reviewable fix plan as JSON/YAML, plus a CI gate (guestkit gate --fail-below 80) so a broken disk fails the pipeline, not the cutover window.

Cutover Passport

A signed, verifiable record (guestkit passport emit / verify) — an audit trail for migration that MTV or virt-v2v can otherwise skip entirely.

Assured QEMU launch

guestkit-qemu plans and runs from the same evidence gate — assured first boot without hand-building QEMU argv yourself.

h2kvm pipeline integration

Pre-flight with guestkit doctor, then hand off to h2kvm for hypervisor-to-KVM conversion and deploy — offline repair and conversion in one flow.

Python bindings + GitHub Action

Same assurance engine on PyPI (zyvor-guestkit) for scripting, plus a zyvorai/guestkit@v1 GitHub Action for CI gating with no CLI install step.

The web console

The bundled OSS console rendering its offline demo data. See the tour and recorded demos →

Assurance — doctor score 78 with ranked findingsSummary — OS identity and inventory countsImage Vault landing page

Real, recorded demos

Apache-2.0 core, 70+ commands across 6 disk formats, 0 appliance daemons. The CLI & TUI and web dashboard demos are recorded live against real deployments — not staged screenshots.

See the full command reference →
CI statuscrates.io versionApache 2.0 license

Open source core, Enterprise for scale

GuestKit's core is Apache-2.0 and free to run in production. Zyvor Enterprise adds a 30-day trial with fleet analysis, policy-as-code, and production support for teams running this at scale.

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