Individual skill
comfyui-launch-flags
Pick the right ComfyUI startup flags for VRAM, attention, caching, and speed. The full decision matrix for OOM (--novram / --cache-none / --disable-smart-memory), shared-VRAM creep on Windows (--reserve-vram N), model-switching with big text encoders (--cache-none), high-VRAM throughput (--gpu-only / --highvram), and attention-backend selection (--use-sage-attention for speed, --use-pytorch-cross-attention as the highest-quality / Z-Image-safe fallback). Also the acceleration-stack + Blackwell/RTX 5000 (sm_120) notes. Use when a graph OOMs (especially long video like LTX 2 / WAN), when the GPU spills into shared VRAM and slows to a crawl, when switching between models eats all RAM, when Z-Image produces black/garbled output under Sage, or when deciding which attention backend to launch with. Flag names verified against upstream comfy/cli_args.py; see Sources.
plugin/skills/comfyui-launch-flags/SKILL.md
Source commit 5bfe534ed114c3037137b3fabd209011238e9d10
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 4, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 900
- Repository last updated
- Nov 4, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- agent-skills Repository topic
- ai-agent Repository topic
- claude-code Repository topic
- claude-plugin Repository topic
- comfyui Repository topic
- comfyui-extension Repository topic
- flux Repository topic
- image-generation Repository topic
- mcp Repository topic
- mcp-server Repository topic
- productivity Derived category
- productivity-notes Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
Read excerpt
# ComfyUI launch/performance flags
## Overview
CLI flags passed to `main.py` control ComfyUI's runtime behavior
(e.g. `python main.py --reserve-vram 2 --use-sage-attention`). The three that
matter most for making a graph *run* rather than OOM or crawl are the
VRAM strategy, the attention backend, and the cache mode. This skill
is the decision matrix for choosing them.
> ⚠<U+FE0F> **Verification note (August 2026).** Every flag below was checked against
> upstream [`comfy/cli_args.py`](https://github.com/comfyanonymous/ComfyUI/blob/master/comfy/cli_args.py)
> on current master. ComfyUI adds/renames flags often — when in doubt run
> `python main.py --help` in the target install and prefer that over this list.