Registers the remove-pdf-background-gray skill for DSH: whitens gray/off-white scan backgrounds in image-based PDFs while preserving resolution, page geometry, and anti-aliased text edges (lossless Flate write-back), via a single Python script (pypdf + Pillow + numpy).
Install
# from npm (prebuilt)
dsh plugin --profile web add dsh-pdf-background-gray
# from GitHub (first run asks for allowBuilds approval — follow the hint, retry)
dsh plugin --profile web add github:zjsthmjialin/pdf-background-gray-codex-skill#path:/dsh-pdf-background-gray
Any plugin you install runs third-party code with your own permissions — it can read your files, use your credentials, and reach the network, and tool approvals don’t sandbox it. GitHub-sourced plugins also run build scripts at install time — pnpm blocks those until you allow them, so an install can stop with ERR_PNPM_GIT_DEP_PREPARE_NOT_ALLOWED or ERR_PNPM_IGNORED_BUILDS; dsh prints the exact key to add under allowBuilds in your profile’s pnpm-workspace.yaml, and the install works on the next run. Allowing a build is a trust decision: only install sources you trust, and pin a commit (github:owner/repo#sha).
README
This plugin publishes its README in Chinese only.
「Remove PDF Background Gray」技能的 DeepSeek Harness (DSH) 插件化分发包。
安装后自动向 DSH 技能系统注册 remove-pdf-background-gray 技能：去除扫描 PDF 的灰色/米白底色，保持原始分辨率、页面几何与抗锯齿文字边缘（不做硬阈值/二值化、不重采样、无损 Flate 压缩）。
安装
dsh plugin --profile web add dsh-pdf-background-gray
重启 DSH Web 后，向 Agent 说"把这份扫描 PDF 去底灰"即自动走技能工作流。
运行时要求（Python）
- Python 3.10+
python -m pip install pypdf Pillow numpy
用法（技能内嵌，直接给 agent 即可）
python scripts/remove_pdf_background_gray.py INPUT.pdf OUTPUT.pdf
# 深色纸张：--low 235 --white-point 250
内容
SKILL.md：工作流与护栏（pdfinfo 检查 → 直改图像对象 → 验证）scripts/remove_pdf_background_gray.py：核心脚本（单文件，124 行）
发布 / 维护
npm pack --dry-run
npm publish
维护纪律：技能本体改动 → 同步 skills/remove-pdf-background-gray/ 快照 → 版本迭代重发。
完整迁移流程见 SKILL-TO-DSH-PLUGIN.md（同目录模板）。
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