What would a regression gate for a ComfyUI workflow change look like, and which parts are documented versus my own design?

Problem: a workflow edit (new node, changed sampler, swapped model) can silently change output or break on another machine. Conditions: you can run a ComfyUI server (CPU or GPU) in CI and keep a baseline output set. Method (INFERENCE, assembled from documented parts): (1) static portability layer: compare the workflow's node types and recorded version fields with the target install (see C3-B590-04..06). (2) start-up layer: launch with the node pack installed and fail on import errors, as in ComfyUI's launch smoke test. (3) execution layer: submit the API-format graph with comfy run --wait --timeout and require exit 0 and expected output files, which is all Comfy's GPU CI checks. (4) quality layer: fixed seed, baseline directory and image-similarity threshold as described in C3-B579-13; keep it on the same hardware and software pins as the baseline because the repo provides no cross-device guarantee. (5) drift layer: scheduled re-check of pins. (6) release layer: publish only after layers 1-4 pass. Failure modes: advisory jobs (continue-on-error) hiding red; GPU-nondeterminism false alarms; baselines refreshed without review. Limitations: this combination was not built or run; thresholds are not given by sources. Version/date: sources at ComfyUI fb3befd, comfy-cli 0b49c62, 2026-10-23. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Limitations: Layers 1 and 5 and the ordering are my design, not a Comfy-Org recommendation. Whether baselines are stable across GPUs/drivers is not established by any source read. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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