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Image Compress

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image-compress

Image Compress is an Agent Skill for documents published in the dongsheng123132/u-claw repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

图片压缩/转换 - 批量压缩、改尺寸、转格式(jpg/png/webp),本地处理不失隐私

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How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

  1. Open your project in Codex.
  2. Copy and paste the prompt below.
  3. Review files and risks before approving any action.
Prompt to paste
Inspect the Agent Skill at https://github.com/dongsheng123132/u-claw/blob/HEAD/portable/skills-cn/image-compress/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/image-compress, but wait for my approval before writing files or running scripts.

Copying this prompt does not install or run the skill. Review third-party files before use.

图片压缩 / 转换

帮用户压缩图片体积、调整尺寸、转换格式,全部本地处理,照片不外传。

能力概述

  • 压缩:降低体积(控制质量/分辨率),适合发邮件、传微信
  • 改尺寸:按宽高或百分比缩放
  • 转格式:jpg / png / webp 互转(webp 体积最小)
  • 批量:处理整个文件夹

操作方式

用 Bash 工具,Python 的 Pillow 库(跨平台、纯本地):

python -c "import PIL" 2>/dev/null || pip install -q Pillow

# 单张压缩(质量 75,宽度限制 1600px 等比缩放)
python - <<'PY'
from PIL import Image
im = Image.open("input.jpg")
if im.width > 1600:
    im = im.resize((1600, int(im.height*1600/im.width)))
im.convert("RGB").save("output.jpg", "JPEG", quality=75, optimize=True)
print("已压缩 -> output.jpg")
PY

# 批量:当前目录所有 jpg/png -> webp(体积更小)
python - <<'PY'
from PIL import Image
import glob, os
for f in glob.glob("*.jpg") + glob.glob("*.png"):
    out = os.path.splitext(f)[0] + ".webp"
    Image.open(f).save(out, "WEBP", quality=80)
    print(f"{f} -> {out}")
PY

使用建议

  • 处理前 ls -lh 看原图体积,处理后再 ls -lh 对比,告诉用户压缩了多少
  • 默认不覆盖原图(输出新文件名),除非用户明确要求覆盖
  • 含透明通道的 PNG 转 JPG 会丢透明,转 webp 可保留——按需选格式