Agent skill · creative production · aiskillstore
flux-2-klein
Generate images with Flux 2 Klein (Black Forest Labs' distilled fast variant of Flux 2) on RunComfy — bundled with the model's documented prompting patterns so the skill gets sharper output than naive prompting against the same model. Documents Flux 2 Klein's strengths (sub-second latency, multi-reference brand styling, declarative subject-first prompts), the step-count strategy (4–8 for fast iteration, ~25 for polish), the 9B vs 4B variant trade-off, and when to route to Flux 2 Pro / Seedream 5 / GPT Image 2 instead. Calls `runcomfy run blackforestlabs/flux-2-klein/9b/text-to-image` (or `/4b/`) through the local RunComfy CLI. Triggers on "flux 2 klein", "flux-2-klein", "flux klein", "BFL flux 2", or any explicit ask to generate with this model.
Why this skill is useful
Documents specific prompting patterns and model strengths for effective image generation that the AI wouldn't reliably generate on its own.
What it needs
Requires @runcomfy/cli installed locally. Requires runcomfy account access. About 6k tokens when loaded. Last updated 2026-08-07. 405 stars on the source repository.
What this skill does
Flux 2 Klein — Pro Pack on RunComfy runcomfy.com · 9B model · 4B model · GitHub Black Forest Labs' Flux 2 Klein (the distilled, low-latency variant of Flux 2) hosted on the RunComfy Model API — no API key, async REST. When to pick this model (vs siblings) Flux 2 Klein's distinct strength is latency-first creative iteration: sub-second feedback enables live art-direction sessions and rapid product visualization that batch-style models can't sustain. Pick it when iteration speed matters more than ceiling resolution. You want Use --- --- Real-time / live art-direction sessions Flux 2 Klein 4B Fast iteration with strong detail at the end Flux 2 Klein 9B Multi-reference brand styling with consistent looks Flux 2 Klein 2K–4K hero images, max resolution Seedream 5 Maximum prompt adherence + extreme detail Flux 2 Pro Embedded text, logos, multilingual signage GPT Image 2 Hyperrealistic portrait Nano Banana Pro If the user said "Flux 2 Klein" / "BFL Klein" / "flux klein" explicitly, route here regardless. If they said "Flux 2" generically, ask whether they want Klein (fast) or Pro (max quality) before defaulting. Prerequisites 1. RunComfy CLI — npm i -g @runcomfy/cli 2. RunComfy account — runcomfy login opens a browser device-code flow. 3. CI / containers — set RUNCOMFYTOKEN=<token> instead of runcomfy login. Endpoints + input schema Two variants, same endpoint shape, same prompt grammar. blackforestlabs/flux-2-klein/9b/text-to-image The fidelity-first variant. Use for polish / final output. Field Type Required Default Notes --- --- --- --- --- prompt string yes — Up to ~512 tokens. Longer degrades. steps int no 25 4–50. Step-distilled architecture — 4–8 enough for concepting; ~25 for polish; >25 buys little. width int no 1024 512–1536 typical. Aspect ratio capped at 16:9, max ~2K total. height int no 1024 Match width's aspect intent. blackforestlabs/flux-2-klein/4b/text-to-image The latency-first variant. Sub-second 4-step inference. Use for live iteration / concepting. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills aiskillstore/flux-2-klein