Claude Prompt Enhancer

Claude Prompt Enhancer is the fastest win in the ERPK Claude section: type "a cat," pick a style, and get back a long, rich, image-model-ready prompt that reads like a photography brief. It exists because the gap between what humans type and what diffusion models need is enormous - a bare subject produces a bare image, and this node spends a Claude call to fill in the lighting, lens, composition, and mood for you.

The mechanism is about as direct as it gets. Each of the 51 styles is a distinct system prompt that tells Claude what kind of expert it should be - "You are an expert photography director. Include: lighting setup, camera settings, lens choice, depth of field…" for photorealistic, a cinematography expert for cinematic, a fantasy art director for fantasy_art, and so on through cyberpunk, anime, oil_painting, watercolor, concept_art, minimalist, maximalist, and more. Your prompt goes in, the style's system prompt shapes the output, and you get a single enhanced prompt STRING out the other side. It's prompt engineering as a dropdown.

The inputs

• prompt - the simple thing you want enhanced (e.g. "a cat")
• style - the dropdown of 51 styles, default photorealistic
• detail_level - how much detail to add
• seed - cache control; randomize for fresh results each run, fixed to reuse
• temperature - 0 to 1, default 0.7
• max_tokens - default 1024, up to 4096
• client - optional, falls through to ERPK Settings
• use_streaming - boolean, off by default; the tooltip honestly notes streaming may not display in real time in ComfyUI

The single output is enhanced_prompt (STRING). Wire it into the prompt input of whatever image node you're feeding - a local checkpoint's CLIP text encode, or any of this pack's hosted image nodes. The natural chain is Claude Prompt Enhancer → image node, so your terse idea arrives as a well-described scene.

Install

It's part of the ERPK Collection:

cd ComfyUI/custom_nodes
git clone https://github.com/eRepublik-Labs/comfyui-nodes-erpk.git erpk
cd erpk && pip install -r requirements.txt

Requires anthropic>=0.96.0 and an Anthropic API key in ERPK Settings (right-click canvas). Or "ERPK Custom Nodes" via ComfyUI Manager, restart, done.

Where it fits - and where it doesn't

Honestly, this node is a great on-ramp if you're new to prompting: it teaches you, by example, what a good prompt contains. The output is usually verbose - sometimes too verbose for local checkpoints, where a paragraph of camera jargon can dilute a style rather than sharpen it. If you're feeding a local SDXL or Flux pipeline, you may want detail_level low and to keep the style focused. For hosted models that reward long natural-language descriptions, go detailed. And a practical note: because each run is a paid Claude call, the seed widget exists to let you cache and reuse an enhancement you like instead of re-billing every queue. Randomized seed means fresh (and slightly different) text every run - if you want the same enriched prompt back, fix it.