Picnow — Image Generation

通过 Node 脚本调用 Picnow 的 GPT-Image-2 异步图像接口，按文本提示或参考图生成图片，支持 1K/2K/4K、方形/横版/竖版比例及 1-10 张批量出图；需设置 LETMEGO_API_KEY，脚本提交任务并轮询后输出图片 URL。

jeekchen

热度 43.94

最近更新 2026-05-28 23:04:00

分类：创作依赖：代码执行 / 第三方 API / 读写文件应用场景：图像生成 / 品牌素材 / 社交媒体

安装技能

复制下面的话术发给你的 Agent，它会通过 secure-skills 检索并安装该技能。

执行命令安装此 skill： npx secure-skills-cli add picnow

Metadata

name: picnow
description: Generate high-quality images via Picnow (api.letmego.top). Activate when the user wants to create, generate, draw, or design images — including product photos, posters, banners, illustrations, social media visuals, hero shots, covers, and thumbnails. Also handles image editing: style transfer, background change, image-to-image (改图/配图/修图/图改图). Supports 1K / 2K / 4K resolution, square / landscape / portrait aspect ratios. Requires LETMEGO_API_KEY environment variable (your letmego 令牌/token).
when_to_use: ["User asks to generate, draw, create, or make an image / picture / photo / visual / graphic / artwork / illustration","User says \"image for\", \"picture for\", \"visual for\", \"banner for\", \"poster for\"","User wants a product photo, hero shot, thumbnail, cover, poster, banner, or social media image","User wants to edit, retouch, restyle, stylize, or transform an existing image","User wants image-to-image, style transfer, background change, or outpainting","User asks to \"add an image\", \"pair with image\", \"create a graphic\", or \"design a visual\"","User wants to render, visualize, or illustrate something","用户说生图 / 出图 / 做图 / 画图 / 画张 / 画一张 / 帮我画 / 帮我出图","用户说配图 / 加图 / 插图 / 来张图 / 给我图 / 图片素材","用户说改图 / 修图 / 图改图 / 换风格 / 风格化 / 重绘","用户说生成图片 / 生成图像 / 创作图 / 设计图","用户说产品图 / 主图 / 效果图 / 宣传图 / 海报 / 封面 / 头图 / 背景图","用户说换背景 / 去背景 / 修改图片 / 图片编辑"]
allowed-tools: ["Bash"]

Picnow Image Generation Skill

Picnow wraps the api.letmego.top GPT-Image-2 API. This skill handles text-to-image and image-to-image (edit) generation.

The script uses the async API (/v1/async/images/...) — it submits the job, polls until completion, and prints the final URL. This avoids the 100s Cloudflare edge timeout that 2K/4K renders used to hit. A single call may take up to ~5 minutes for heavy renders; no extra flags needed.

1. Environment check

Before generating, verify the token is set:

if [ -z "$LETMEGO_API_KEY" ]; then
  echo "❌ LETMEGO_API_KEY is not set."
  echo "Visit https://api.letmego.top to get your 令牌, then:"
  echo "  export LETMEGO_API_KEY=your_token"
  exit 1
fi

2. Gather parameters

Ask the user if not already provided:

Parameter	Options	Default
`prompt`	any text description	(required)
`quality`	`1k` · `2k` · `4k`	`1k`
`aspect`	`square` · `landscape` · `portrait`	`square`
`n`	1 – 10	`1`
`ref`	local file path (optional)	(none → text-to-image)

Quality guide:

1k — up to 1536×1536, fast and cheap, great for previews and social media
2k — up to 2048×2048, suitable for e-commerce and print
4k — up to 3840×2160, landscape or portrait only (no 4k square)

3. Locate and run the generation script

# Resolve skill directory (user-global → project-local)
SKILL_DIR="$HOME/.claude/skills/picnow"
[ -d "$SKILL_DIR" ] || SKILL_DIR=".claude/skills/picnow"

node "$SKILL_DIR/scripts/generate.js" \
  --prompt "PROMPT_HERE" \
  --quality QUALITY \
  --aspect ASPECT \
  --n N
  # add: --ref /path/to/image.jpg   for image-to-image

The script outputs a single JSON line:

{ "urls": ["https://...cdn.../image.png"] }

4. Present results

Display each URL as a clickable link or inline image.
For multiple images, list them with index labels (1/3, 2/3, …).
Offer to download, save to a project, or run another variation.

Error handling

Exit condition	Meaning	Action
`LETMEGO_API_KEY` missing	Token not set	Guide user to picnow settings
HTTP 401	Token invalid	Ask user to check or refresh token
HTTP 402 / quota	Insufficient balance	Direct to letmego.top recharge
HTTP 4xx other	Bad request	Show upstream error message
Network error	Connection issue	Suggest retry

Examples

Text-to-image:

User: 帮我画一张珠宝产品主图，白色背景，高清
→ quality=2k, aspect=square
→ node "$SKILL_DIR/scripts/generate.js" \
    --prompt "jewelry product hero shot, white background, studio lighting, photorealistic" \
    --quality 2k --aspect square --n 1

Image-to-image:

User: 把这张图改成动漫风格 [uploads reference.jpg]
→ quality=1k, ref=reference.jpg
→ node "$SKILL_DIR/scripts/generate.js" \
    --prompt "anime style illustration, vibrant colors, clean linework" \
    --quality 1k --aspect square --n 1 --ref reference.jpg

Landscape banner:

User: Generate a landscape banner for a coffee brand
→ quality=1k, aspect=landscape, n=2
→ node "$SKILL_DIR/scripts/generate.js" \
    --prompt "coffee brand lifestyle banner, warm tones, morning light, artisan aesthetic" \
    --quality 1k --aspect landscape --n 2