[Legacy] MiniMax H3 RefDelta Reference Replay

What this is

The thinnest node in the pack: a deprecated alias for the Ref2VA diagnostic replay pass, kept so old saved workflows still load. Its own description says everything you need: "Legacy Ref2VA replay alias. Use MiniMax H3 RefDelta Comparison Replay."

Underneath it's the same disk-backed comparison-replay machinery - replay exact captured fused sampler states through the currently loaded model, return the captured fused final latent - but with the comparison label hardcoded to the Ref2VA pass. If you have a workflow with this node in it, it's doing the "Pass 3" step of the three-pass diagnostic workflow from a version of the pack before the comparison node generalized the labels.

The inputs

Two strings and nothing else:

• calibration_id (default refdelta_calibration) - must match the ID used when the fused capture was written, or the replay finds nothing.
• telemetry_prefix (default refdelta_reference_replay) - filename prefix for this pass's telemetry.

Output is a single SAMPLER, wired into a KSampler/SamplerCustomAdvanced sampler socket like any other.

Should you use it?

Not for new work. It's a compatibility shim. The modern replacement is MiniMax H3 RefDelta Comparison Replay with comparison_label = ref2va, which does the same job with an explicit label and keeps the same on-disk capture format. The historical calibration_* naming is retained throughout the pack for exactly this reason - files and workflows from the old era keep working.

One caveat to remember from the parent workflow: the Ref2VA pass depends on a completed FL2VA pass, and both depend on the fused capture from the diagnostic sampler. If you're chasing a replay error with this node, check that the capture actually exists under ComfyUI/output/refdelta_calibration/<calibration_id>/.

Install

cd ComfyUI/custom_nodes
git clone https://github.com/xmarre/ComfyUI-MiniMax-H3-RefDelta-Solver.git

Restart ComfyUI. No pip dependencies; you still need the fused checkpoint and the genuine Ref2VA model on disk for the pass to mean anything.