MiniMax H3 VLM System Instruction Advanced Presets Experimental

This is the most configurable of the four MiniMax H3 system-instruction nodes: the experimental timeline presets from UC_MiniMaxH3VLMSysInstrPresetsExperimental, plus the full set of override fields from UC_MiniMaxH3VLMSysInstrAdvPresets. If you want to steer H3's prompt-driven timeline and inject your own system and user instructions on top, this is the node. It's the intersection of the experimental and advanced axes in silveroxides/ComfyUI-UtilsCollection's H3 text tooling.

What's on the node

• preset - the experimental dropdown, defaulting to minimax_h3_timeline_fl2va, with ref2va and the "crude" variants alongside it.
• system_query - your instruction, appended last as "Highest-priority system override", so it wins.
• user_query - target-video requirements, appended as "Requested target-video requirements".
• system_query_additional - extra context that doesn't override the preset.
• jailbreak - wraps the result in the pack's jailbreak prefix/suffix, off by default.
• system_instruction - the assembled output string.

The assembly order is identical to the stable Advanced node: preset, then user query, then additional system text, then the jailbreak framing, with your system_query landing last as the override. Same mechanics, experimental preset list underneath.

Installing it

Via the pack:

• ComfyUI Manager: search "ComfyUI-UtilsCollection".
• Or:

cd ComfyUI/custom_nodes
git clone https://github.com/silveroxides/ComfyUI-UtilsCollection

Restart ComfyUI. No models for the node itself; the H3 weights are the separate, license-gated download.

Gotchas

You're stacking two layers of "experimental" here - new timeline presets and the override machinery - which is exactly where you want to be disciplined about testing. Change one thing per run, keep a fixed seed, and when the result gets weird, first try dropping your system_query override to see if it's fighting the timeline preset. It's also worth remembering this node exists so you don't end up chaining three other nodes together to do the same job: if you want timeline presets plus overrides, this is the single-node answer, and that's what it's for.